阅读说明：本技术 用于管理有限无线电覆盖中的无线装置的设备与方法 (Apparatus and method for managing wireless devices in limited radio coverage ) 是由 P.施利瓦-贝尔特林 M.孙德贝里 J.W.迪亚基纳 N.约翰松 于 2015-06-24 设计创作，主要内容包括：本文中公开了用于基于在无线装置与网络(例如,无线电接入网络(RAN)节点、核心网络(CN)节点)之间交换上行链路和下行链路无线电条件信息(称为上行链路和下行链路无线电覆盖类别(RCC)值)以便在数据传送(例如,控制平面有关信令或用户平面有关有效负载传送)中使用而增强用于无线装置的无线电覆盖的机制。(Disclosed herein are mechanisms for enhancing radio coverage for a wireless device based on exchanging uplink and downlink radio condition information (referred to as uplink and downlink Radio Coverage Class (RCC) values) between the wireless device and a network (e.g., a Radio Access Network (RAN) node, a Core Network (CN) node) for use in data transfer (e.g., control plane related signaling or user plane related payload transfer).)

1. Wireless device (104)₂) The wireless device comprises:

processor (118)₂) (ii) a And

memory (120) storing processor-executable instructions₂) Wherein the processor interfaces with the memory to execute the processor-executable instructions whereby the wireless device is operable to receive (602) from a Radio Access Network (RAN) node (102)₂) The control channel of (a); estimating (604) downlink radio conditions based on a signal quality of the received control channel; mapping (606) the estimated downlink radio condition to one of a plurality of downlink Radio Coverage Class (RCC) values; transmitting (608) a first message (202) comprising the one downlink RCC value to the RAN node; and receiving (610) a second message (204) from the RAN node having a number of repeated downlink transmissions based on the one downlink RCC value.

2. The wireless device of claim 1, wherein the wireless device is further operable to

Determining (608') an estimated number of repeated uplink transmissions to be used when transmitting the first message to the RAN node, wherein the first message is a first contact with the RAN node, and wherein the estimated number of repeated uplink transmissions in the first message is based on the estimated downlink radio condition or preconfigured information.

3. The wireless device of claim 1, wherein:

the second message includes an uplink RCC value, an

The wireless device is also operable to map (612) the uplink RCC value to a number of repeated uplink transmissions; and transmitting (614) a third message (206) to the RAN node that is repeated according to the number of repeated uplink transmissions.

4. The wireless device of claim 3, wherein the second message further includes a new downlink RCC value when the RAN node determines to use the new downlink RCC value instead of the one downlink RCC value included in the first message transmitted to the RAN node.

5. In a wireless device (104)₂) The method (600) of (1), the method comprising:

receiving (602) a signal from a Radio Access Network (RAN) node (102)₂) The control channel of (a);

estimating (604) downlink radio conditions based on a signal quality of the received control channel;

mapping (606) the estimated downlink radio condition to one of a plurality of downlink Radio Coverage Class (RCC) values;

transmitting (608) a first message (202) comprising the one downlink RCC value to the RAN node; and

receiving (610) a second message (204) from the RAN node having a number of repeated downlink transmissions based on the one downlink RCC value.

6. The method of claim 5, further comprising:

determining (608') an estimated number of repeated uplink transmissions to be used when transmitting the first message to the RAN node, wherein the first message is a first contact with the RAN node, and wherein the estimated number of repeated uplink transmissions in the first message is based on the estimated downlink radio condition or preconfigured information.

7. The method of claim 5, wherein:

the second message includes an uplink RCC value, an

The method further comprises the following steps:

mapping (612) the uplink RCC value to a number of repeated uplink transmissions; and

transmitting (614) a third message to the RAN node that is repeated according to the number of repeated uplink transmissions.

8. The method of claim 7, wherein the second message further includes a new downlink RCC value when the RAN node determines to use the new downlink RCC value instead of the one downlink RCC value included in the first message transmitted to the RAN node.

9. A Radio Access Network (RAN) node (102)₂) The RAN node comprises:

processor (132)₂) (ii) a And

memory (134) storing processor-executable instructions₂) Wherein the processor interfaces with the memory to execute the processor-executable instructions whereby the node is operable to communicate to one or more wireless devices (104)₂,104₃…104_n) Transmitting (802) a control channel; receiving (804) a signal from one of the wireless devices (104)₂) Comprises a first downlink Radio Coverage Class (RCC) value (202); and transmitting (809) a second message (204) to the one wireless device that is repeated according to the first downlink RCC value included in the first message received from the one wireless device.

10. The RAN node of claim 9, wherein the RAN node is further operable prior to transmitting the second message to determine (806) a downlink RCC value to be used for the one wireless device; mapping (808) the determined downlink RCC value to a number of repeated downlink transmissions of a downlink message to be used for transmission to the one wireless device, wherein the determined downlink RCC value is added to the second message when the determined downlink RCC value is different from the first downlink RCC value; and transmitting (810) a third message (205) to the one wireless device, the third message being repeated according to the number of repeated downlink transmissions based on the determined downlink RCC value.

11. The RAN node of claim 10, wherein the RAN node is further operable to

Determining the downlink RCC value to be used for the one wireless device based on: (1) the first downlink RCC value; (2) an estimated downlink RCC value; or (3) a running average of the previously estimated downlink RCC value and the previously received first downlink RCC value.

12. The RAN node of claim 9, wherein the RAN node is further operable to estimate (816) an uplink RCC value based on the received first message; and adding (818) the estimated uplink RCC value to the second message transmitted to the one wireless device.

13. The RAN node of claim 9, wherein the RAN node is further operable to receive (828) a paging message (208) for the one wireless device from a Core Network (CN) node (107), wherein the paging message comprises at least a paging downlink RCC value for the one wireless device; and

transmitting (832 a, 832 b) a paging message (208') to the one wireless device having a number of repeated paging downlink transmissions, wherein the number of repeated paging downlink transmissions is determined based on the paging downlink RCC value.

14. In a Radio Access Network (RAN) node (102)₂) The method (800) of (1), the method comprising:

to one or more wireless devices (104)₂, 104₃…104_n) Transmitting (802) a control channel;

receiving (804) a signal from one of the wireless devices (104)₂) Comprises a first downlink Radio Coverage Class (RCC) value (202); and

transmitting (809), to the one wireless device, a second message (204) that is repeated according to the first downlink RCC value included in the first message received from the one wireless device.

15. The method of claim 14, wherein prior to transmitting the second message, the method further comprises:

determining (806) a downlink RCC value to be used for the one wireless device;

mapping (808) the determined downlink RCC value to a number of repeated downlink transmissions of a downlink message to be used for transmission to the one wireless device, wherein the determined downlink RCC value is added to the second message when the determined downlink RCC value is different from the first downlink RCC value; and

transmitting (810) a third message (205) to the one wireless device, the third message being repeated according to the number of repeated downlink transmissions based on the determined downlink RCC value.

16. The method of claim 15, further comprising:

determining the downlink RCC value to be used for the one wireless device based on: (1) the first downlink RCC value; (2) an estimated downlink RCC value; or (3) a running average of the previously estimated downlink RCC value and the previously received first downlink RCC value.

17. The method of claim 14, further comprising:

estimating (816) an uplink RCC value based on the received first message; and

adding (818) the estimated uplink RCC value to the second message transmitted to the one wireless device.

18. The method of claim 14, further comprising:

receiving (828) a paging message (208) for the one wireless device from a Core Network (CN) node (107), wherein the paging message comprises at least a paging downlink RCC value for the one wireless device; and

transmitting (832 a, 832 b) a paging message (208') to the one wireless device having a number of repeated paging downlink transmissions, wherein the number of repeated paging downlink transmissions is determined based on the paging downlink RCC value.

19. A Core Network (CN) node (107), the CN node comprising:

a processor (146); and

a memory (148) storing processor-executable instructions, wherein the processor interfaces with the memory to execute the processor-executable instructions, whereby the CN node is operable to receive (1002) a request from a Radio Access Network (RAN) node (102)₂) Or a wireless device (104)₂) A message comprising a downlink Radio Coverage Class (RCC) value and an uplink RCC value associated with the one wireless device; and transmitting (1006) a paging message (208) for the one wireless device to the RAN node when a downlink payload becomes available for the one wireless device, wherein the paging message comprises the downlink RCC value and the uplink RCC value associated with the one wireless device.

20. The CN node of claim 19, wherein the paging message further comprises a timestamp indicating a time when the message comprising the downlink RCC value and the uplink RCC value was received by the CN node and a cell identifier indicating where the one wireless device was connected when the message comprising the downlink RCC value and the uplink RCC value was received by the CN node.

21. A method (1000) in a Core Network (CN) node (107), the method comprising:

receiving (1002) a signal from a Radio Access Network (RAN) node (102)₂) Or a wireless device (104)₂) A message comprising a downlink Radio Coverage Class (RCC) value and an uplink RCC value associated with the one wireless device; and

transmitting (1006) a paging message (208) for the one wireless device to the RAN node when a downlink payload becomes available for the one wireless device, wherein the paging message comprises the downlink RCC value and the uplink RCC value associated with the one wireless device.

22. The method of claim 21, wherein the paging message further comprises a timestamp indicating a time when the message comprising the downlink RCC value and the uplink RCC value was received by the CN node and a cell identifier indicating where the one wireless device was connected when the message comprising the downlink RCC value and the uplink RCC value was received by the CN node.

Technical Field

The present disclosure relates to radio transmission and reception of networks and wireless devices, and more particularly, to techniques for enhancing radio coverage based on the exchange of radio condition information between the network and the wireless device for repeated data transmission over a radio interface between the network and the wireless device.

Background

The following abbreviations and terms are defined herein, at least some of which are referred to within the following description of the present disclosure.

3GPP third generation partnership project

AGCH Access grant channel

ASIC specific integrated circuit

BCCH broadcast control channel

BSC base station controller

BSS base station subsystem

CC coverage class

CN core network

DSP digital signal processor

eDRX extended discontinuous reception

EC-GSM extended coverage-global system for mobile communications

Enhanced data rates for EDGE GSM evolution

EGPRS enhanced general packet radio service

eNB evolved node B

E-UTRA evolved universal terrestrial radio access

FCCH frequency correction channel

GSM global mobile communication system

GERAN GSM/EDGE radio access network

IMSI International Mobile subscriber identity

IoT Internet of things

LLC logical link control

MME mobility management entity

MTC machine type communication

NAS non-access stratum

LTE Long term evolution

PACCH packet associated control channel

PDN packet data network

PDTCH packet data traffic channel

PDU protocol data unit

RACH random access channel

RAN radio access network

RAT radio access technology

RAU routing area update

RCC radio coverage class

RLC radio link control

RNC radio network controller

RRC radio resource control

SCH synchronous channel

SGSN serving GPRS support node

SI system information

TLLI temporary logical link identifier

UE user equipment

UL uplink

UMTS universal mobile telecommunications system

WCDMA wideband code division multiple access

Worldwide interoperability for WiMAX microwave access

The expected widespread deployment of wireless devices for what is known as Machine Type Communication (MTC) will result in the placement of wireless devices outside the typical radio coverage of existing radio networks, e.g., in basements and similar locations. One way to improve radio coverage is by extending the radio access network infrastructure, such as by adding additional Radio Base Station (RBS) equipment. However, this can cause unreasonable investment work very quickly and may not be acceptable to the operator.

An alternative to adding further devices is to keep the existing radio access network infrastructure unchanged, but instead improve the radio coverage by novel radio transmission and reception techniques and new radio resource management algorithms. The latter scheme is currently being discussed in the wireless industry and is the subject of standardized work in, for example, the third Generation partnership project (3GPP), as described in the technical report 3GPP TR 36.824 V11.0.0 entitled "Evolved Universal radio Access (E-UTRA); LTE coverage enhancements" and the description GP-140421 of the 3GPP TSG-GERAN #62 conference work Item entitled "New Study Item on Cellular System Support for Ultra Low availability and Low Throughput Internet of thinnings". The contents of these two documents are hereby incorporated by reference herein for all purposes.

While there are many techniques that can be used to enhance radio coverage, one technique is to enhance radio coverage by using repeated transmissions. The duplicate transfer technique is currently considered in the context of the standardization effort in 3GPP TSG GERAN, as described in the above-mentioned 3GPP TR 36.824 V11.0.0 technical report entitled "Evolved Universal Radio Access (E-UTRA); LTE coverage enhancements", in 3GPP TSG RAN and as described in the 3GPP TR 45.820 V1.3.0 technical report entitled "Cellular System Support for Ultra Low complexity and Low Throughput Internet of thinnings".

A problem seen in existing solutions associated with the duplicate transmission technique described in the above-mentioned technical report is that the wireless device or the network, in this case, the Radio Access Network (RAN) node responsible for the duplicate transmission (e.g. evolved node b (enb) in Long Term Evolution (LTE), the Radio Network Controller (RNC) in 3G or the Base Station Controller (BSC) in 2G) is not aware of the Radio Coverage Class (RCC) applicable when initiating a new uplink or downlink data transmission for the wireless device. This may, to a large extent, cause too few or too many repeated transmissions during the initial phase of data transmission with the wireless device (e.g., during periods when the RAN node is not aware of wireless device-specific RCC information). For example, too few duplicate transmissions may be initially applied to the transmission, resulting in a failed data transmission, due to an erroneous initial estimate in the number of duplicate transmissions required. Subsequently, another set of repeated transmissions based on a better understanding of the required number of repeated transmissions (e.g. derived from failed data transmissions) may follow, but still result in an inefficient use of scarce radio resources. Alternatively, too many repeated transmissions may be initially applied to the transmission, causing inefficient use of scarce radio resources, increasing interference to the network, and consuming too much energy, among other things.

Given that most of the applications associated with MTC, including the internet of things (IoT), will be primarily used to transmit small amounts of data (e.g., meter data, temperature sensor data, etc.), an improved mechanism for accurately determining the number of repeated transmissions to and/or from a wireless device's need would be an extremely valuable, if not critical, requirement to be met during the initial stages of downlink or uplink data transmission between a RAN node and a wireless device. The present disclosure addresses this and other needs.

Disclosure of Invention

Wireless devices, RAN nodes, CN nodes and various methods for addressing at least the above mentioned needs are described in the independent claims. Advantageous embodiments of the wireless device, the RAN node, the CN node and the various methods are also described in the dependent claims.

In an aspect, the present disclosure provides a wireless device configured to communicate with a RAN node and a CN node. The wireless device includes a processor and a memory storing processor-executable instructions, wherein the processor interfaces with the memory to execute the processor-executable instructions, whereby the wireless device is operable to perform a first receive operation, an estimate operation, a map operation, a transmit operation, and a second receive operation. In a first receiving operation, the wireless device is operable to receive a control channel from the RAN node. In the estimating operation, the wireless device may be operable to estimate downlink radio conditions based on a signal quality of the received control channel. In the mapping operation, the wireless device is operable to map the estimated downlink radio condition to one of a plurality of downlink Radio Coverage Class (RCC) values. In a transmitting operation, the wireless device is operable to transmit a first message comprising one downlink RCC value to the RAN node. In a second receiving operation, the wireless device is operable to receive a second message from the RAN node having a number of repeated downlink transmissions based on the one downlink RCC value. A wireless device configured to operate in this manner would address the needs in the state of the art by effectively using scarce radio resources during the initial phase of data transfer, reducing interference to the network, and reducing the consumption of battery power by the wireless device, among other things.

In another aspect, the present disclosure provides a method in a wireless device configured to communicate with a RAN node and a CN node. The method comprises a first receiving step, an estimating step, a mapping step, a transmitting step and a second receiving step. In a first receiving step, a control channel is received from the RAN node. In the estimating step, a downlink radio condition is estimated based on the signal quality of the received control channel. In the mapping step, the estimated downlink radio condition is mapped to one of a plurality of downlink Radio Coverage Class (RCC) values. In the transmitting step, a first message is transmitted to the RAN node, wherein the first message comprises a downlink RCC value. In a second receiving step, a second message is received from the RAN node, wherein the second message has a number of repeated downlink transmissions based on the one downlink RCC value. The method will address the needs in the state of the art by efficiently using scarce radio resources during the initial phase of data transfer, reducing interference to the network, and reducing the consumption of battery power by the wireless device, etc.

In yet another aspect, the present disclosure provides a RAN node configured to communicate with one or more wireless devices and a CN node. The RAN node comprises a processor and at least one memory storing processor-executable instructions, wherein the processor interfaces with the at least one memory to execute the processor-executable instructions, whereby the RAN node is operable to perform a first transmit operation, a receive operation, and a second transmit operation. In a first transmission operation, the RAN node is operable to transmit a control channel to one or more wireless devices. In a receiving operation, the RAN node is operable to receive a first message comprising a first downlink Radio Coverage Class (RCC) value from one of the wireless devices. In the second transmitting operation, the RAN node is operable to transmit, to the one wireless device, a second message that is repeated according to the first downlink RCC value included in the first message received from the one wireless device. A RAN node configured to operate in this manner will address the needs in the state of the art by efficiently using scarce radio resources during the initial phase of data transfer, reducing interference to the network, and reducing the consumption of battery power by wireless devices, among other things.

In yet another aspect, the present disclosure provides a method in a RAN node configured to communicate with one or more wireless devices and a CN node. The method includes a first transmitting step, a receiving step, and a second transmitting step. In a first transmitting step, a control channel is transmitted to one or more wireless devices. In the receiving step, a first message from one of the wireless devices, wherein the first message includes a first downlink Radio Coverage Class (RCC) value. In the second transmitting step, a second message is transmitted to the one wireless device, wherein the second message is repeated according to the first downlink RCC value included in the first message received from the one wireless device. The method will address the needs in the state of the art by efficiently using scarce radio resources during the initial phase of data transfer, reducing interference to the network, and reducing the consumption of battery power by the wireless device, etc.

In yet another aspect, the present disclosure provides a CN node configured to communicate with a plurality of wireless devices and a RAN node. The CN node comprises a processor and at least one memory storing processor-executable instructions, wherein the processor interfaces with the at least one memory to execute the processor-executable instructions, whereby the CN node is operable to perform receive operations, store operations, and transmit operations. In a receiving operation, the CN node is operable to receive a message from one of the RAN node or the wireless device comprising a downlink Radio Coverage Class (RCC) value and an uplink RCC value associated with the one wireless device. In the storing operation, the CN node is operable to store a downlink RCC value and an uplink RCC value associated with the one wireless device. In the transmitting operation, the CN node is operable to transmit a paging message for the one wireless device to the RAN node when the downlink payload becomes available for the one wireless device, wherein the paging message comprises a downlink RCC value and an uplink RCC value associated with the one wireless device. CN nodes configured to operate in this manner will address the needs in the state of the art by effectively using scarce radio resources during the initial phase of data transfer, reducing interference to the network, and reducing the consumption of battery power by wireless devices, among other things.

In yet another aspect, the present disclosure provides a method in a CN node configured to communicate with a plurality of wireless devices and a RAN node. The method includes a receiving step, a storing step, and a transmitting step. In the receiving step, a message is received from one of the RAN node or the wireless device, wherein the message comprises a message of a downlink Radio Coverage Class (RCC) value and an uplink RCC value associated with the one wireless device. In the storing step, a downlink RCC value and an uplink RCC value associated with the one wireless device are stored. In the transmitting step, a paging message for the one wireless device is transmitted to the RAN node when the downlink payload becomes available for the one wireless device, wherein the paging message includes a downlink RCC value and an uplink RCC value associated with the one wireless device. The method will address the needs in the state of the art by efficiently using scarce radio resources during the initial phase of data transfer, reducing interference to the network, and reducing the consumption of battery power by the wireless device, etc.

Additional aspects of the invention will be set forth, in part, in the detailed description, figures and any claims which follow, and in part will be derived from the detailed description, or can be learned by practice of the invention. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as disclosed.

Drawings

A more complete understanding of the present invention may be derived by referring to the following detailed description when considered in connection with the accompanying drawings:

fig. 1 is a diagram of an exemplary wireless communication network according to an embodiment of the present disclosure;

fig. 2 is a signal flow diagram illustrating a downlink RCC value determination process conducted during a wireless device originated transmission, in accordance with an embodiment of the present disclosure;

fig. 3 is a diagram illustrating different wireless devices with different downlink RCC values being addressed by the same resource assignment message, according to an embodiment of the present disclosure;

fig. 4 is a signal flow diagram illustrating an uplink RCC value determination process performed during a wireless device originated transmission, according to an embodiment of the present disclosure;

fig. 5 is a signal flow diagram illustrating a process associated with a wireless device terminating a transmission according to an embodiment of the present disclosure;

fig. 6 is a flow chart of a method implemented in a wireless device according to an embodiment of the present disclosure;

FIG. 7 is a block diagram illustrating the structure of an exemplary wireless device according to an embodiment of the present disclosure;

figures 8A-8B are flow diagrams of methods implemented in a RAN node according to embodiments of the present disclosure;

fig. 9 is a block diagram illustrating the structure of an exemplary RAN node according to an embodiment of the present disclosure;

figure 10 is a flow chart of a method implemented in a CN node according to an embodiment of the present disclosure;

figure 11 is a block diagram illustrating the structure of an exemplary CN node according to an embodiment of the present disclosure;

fig. 12 is a signal flow diagram illustrating further steps in an uplink RCC value determination process performed during a wireless device originated transmission as shown in fig. 4, in accordance with another embodiment of the present disclosure;

fig. 13 is a flow chart illustrating further steps in a method implemented in the wireless device shown in fig. 6, according to another embodiment of the present disclosure; and

figure 14 is a flow chart illustrating further steps in a method implemented in the CN node shown in figure 10, according to another embodiment of the present disclosure.

Detailed Description

To describe technical features of the present disclosure, a discussion is first provided to describe an exemplary wireless communication network (see fig. 1) including a plurality of wireless devices, a plurality of RAN nodes, and CN nodes, each configured according to the present disclosure. Subsequently, a discussion is provided to explain the basic techniques and use cases implemented by the wireless device, the RAN node, and the CN node according to the present disclosure (see fig. 2-5). Following this, a discussion is provided to explain in greater detail various techniques implemented by each of a wireless device, a RAN node, and a CN node in accordance with the present disclosure (see fig. 6-11). Finally, a discussion is provided to explain how a network can be updated with coverage class information by a wireless device according to another embodiment of the present disclosure (see fig. 12-14).

Exemplary Wireless communication network 100

Referring to fig. 1, an exemplary wireless communication network 100 is shown in accordance with the present disclosure. The wireless communication network 100 includes a plurality of wireless devices 104₁、104₂、104₃…104_nDocked multiple RAN nodes 102₁And 102₂Two only shown) and a core network 106 (e.g., CN node 107). The wireless communication network 100 also includes many well-known components, but for clarity only the components necessary to describe the features of the present disclosure are described herein. Further, the wireless communication network 100 is described herein as being a GSM/EGPRS wireless communication network 100, also referred to as an EDGE wireless communication network 100. However, those skilled in the art will readily appreciate that the techniques of the present disclosure as applied to the GSM/EGPRS wireless communication network 100 are generally applicable to other types of wireless communication systems, including, for example, WCDMA, LTE, and WiMAX systems.

The wireless communication network 100 includes RAN nodes 102₁And 102₂(only two shown) provided to the wireless device 104₁、104₂、104₃… 104_nNetwork access. In this example, RAN node 102₁Is being provided to the wireless device 104₁And RAN node 102, and₂is being provided to the wireless device 104₂、104₃…104_nNetwork access. RAN node 102₁And 102₂To a core network 106 (e.g., EGPRS core network 106) and in particular to a CN node 107. The core network 106 is connected to an external Packet Data Network (PDN) 108, such as the internet, and a server 110 (only one shown). Wireless device 104₁、104₂、104₃…104_nMay communicate with one or more servers 110 (only one shown) connected to the core network 106 and/or the PDN 108.

Wireless device 104₁、104₂、104₃…104_nMay generally refer to a terminal (user) attached to the wireless communication network 100, and may refer to an MTC deviceOr a non-MTC device. Furthermore, the term "wireless device" is generally intended to be synonymous with the term "user equipment" or UE, as the term is used by the third generation partnership project (3GPP) and includes stand-alone wireless devices such as terminals, cellular telephones, smart phones, tablets, and wireless-enabled personal digital assistants (pda's) and wireless cards or modules designed for attaching to or plugging in another electronic device such as a personal computer, an electricity meter, and the like.

Similarly, RAN node 102₁And 102₂May generally refer to a base station in a wireless communication network 100, and may refer to a RAN node 102 controlled by a physically distinct radio network controller₁And 102₂And to a more autonomous access point, such as a so-called evolved node b (enodeb) in a Long Term Evolution (LTE) network.

Each wireless device 104₁、104₂、104₃…104_nMay be included for communicating with RAN node 102₁And 102₂Transceiver circuitry 110 for communicating₁、110₂、110₃…110_nAnd for processing slave transceiver circuitry 110₁、110₂、110₃…110_nTransmit and receive by transceiver circuitry 110₁、110₂、110₃…110_nReceived signals and used to control corresponding wireless devices 104₁、104₂、104₃…104_nOf the operation of processing circuit 112₁、112₂、112₃…112_n. Transceiver circuits 110, 110₂、110₀…110_nMay include a transmitter 114₁、114₂、114₃…114_nAnd a receiver 116₁、116₂、116₃…116_nWhich may operate according to any standard, such as the GSM/EDGE standard. Processing circuit 112₁、112₂、112₃…112_nMay include a processor 118₁、118₂、118₃…118_nAnd for storing information for controlling the corresponding wireless device 104₁、104₂、104₃…104_nOf the operating program codeMemory 120₁、120₂、120₃…120_n. The program code may include code for performing a process as described below with respect to fig. 6 and 13.

Each RAN node 102₁And 102₂May be included for communicating with the wireless device 104₁、104₂、104₃…104_nTransceiver circuitry 122 for communicating₁And 122₂For processing slave transceiver circuitry 122₁And 122₂Transmit and receive by transceiver circuit 122₁And 122₂Received signals and for controlling the corresponding radio access node 102₁And 102₂Processing circuit 124 of operations of₁And 124₂And a network interface 126 for communicating with the core network 106₁And 126₂. Transceiver circuit 122₁And 122₂May include a conveyor 128₁And 128₂And a receiver 130₁And 130₂Which may operate according to any standard, such as the GSM/EDGE standard. Processing circuit 124₁And 124₂May include a processor 132₁And 132₂And for storing information for controlling the corresponding radio access node 102₁And 102₂Of program code 134₁And 134₂. The program code may include code for performing a process as described below with respect to fig. 8A-8B.

CN node 107 (e.g., SGSN 107, MME 107) may include a means for communicating with RAN node 102₁And 102₂Transceiver circuitry 136 in communication, for processing signals transmitted from and received by transceiver circuitry 136, and for controlling RAN node 102₁And 102₂And for use with RAN node 102₁And 102₂A network interface 140 to communicate. The transceiver circuitry 136 may include a transmitter 142 and a receiver 144, which may operate in accordance with any standard, such as the GSM/EDGE standard. The processing circuitry 138 may include a processor 146 and a memory 148 for storing program code for controlling the operation of the CN node 107. Program code may include instructions for performing the following description with respect to FIGS. 10 and 14Code for the process described above.

Basic technology and exemplary use cases of the present disclosure

The present disclosure provides for basing the processing at the wireless device 104₂For example, with network 100 (e.g., RAN node 102)₂And/or CN node 107) for use in data transfer (e.g., control plane related signaling or user plane related payload transfer) to enhance radio coverage. It is noted that other wireless devices 104₁、104₃…104_nAnd RAN node 102₁New mechanisms of the present disclosure can also be implemented. The disclosure is based on the network 100 and the wireless device 104₂For applying a certain number of repeated transmissions (e.g. a predefined number) of estimated RCC values over the radio interface. May be downlink (e.g., from wireless device 104)₂Angle) and estimates an RCC value for the uplink (e.g., from the network 100 perspective). The RCC value may be stored, for example, at RAN node 102₂And in the wireless device 104 in a related network node such as a CN node₂For use in determining an appropriate number of repeated transmissions for subsequent data transmissions, e.g., at a paging occasion.

The disclosed technology can implement one or more of the following principles:

may be at RAN node 102₂With a given wireless device 104₂The uplink and downlink radio conditions in between are classified, organized or divided into a series of RCC values.

Mapping a given RCC value to the number of repeated transmissions. The mapping of each RCC value to a particular number of repeated transmissions may be standardized and made to the network 100 (e.g., RAN node 102)₂And/or CN node 107) and wireless device 104₂As is known. Thus, a given RCC value may implicitly or explicitly indicate the number of repeated transmissions, and may thus be a deterministic way for the involved entities 102₂107 and 104₂As is known. Alternatively, the mapping may be adjustable and signaled (a)E.g., in system information) to the involved entity 102₂107 and 104₂。

A wireless device 104₂Its downlink RCC value (with its serving RAN node 102) is transmitted in an applicable procedure and/or message₂Cell-related) estimates are provided to the network 100.

RAN node 102₂Will be associated with a particular wireless device 104 in applicable processes and/or messages₂An estimate of the associated uplink RCC value is provided to the wireless device 104₂。

The network 100 may be, for example, at a RAN node 102₂And the CN node 107 or the like, stores this information in a node that will reuse the information on the uplink and downlink RCC values in subsequent radio transmissions.

A wireless device 104₂Information about uplink and downlink RCC values may be stored and reused in subsequent radio transmissions.

RAN node 102₂May be used to communicate with a particular wireless device 104₂The wireless device specific RCC values for the associated uplink and downlink are uploaded to the relevant CN node 107 (e.g., SGSN 107, MME 107). Alternatively, wireless device specific RCC information may be by the wireless device 104, for example, during non-access stratum (NAS) signaling₂To the CN node 107.

RAN node 102 based on available wireless device specific downlink RCC values₂A number of downlink repeat transmissions are applied over the air interface. The RCC value for determining the number of times to repeat a transmission on the downlink may be based on information from the wireless device 104₂Of the last received RCC value, a network 100 of downlink RCC values (e.g., RAN node 102)₂) Estimated or received downlink RCC values and/or network 100 (e.g., RAN node 102)₂) A running average of the estimated downlink RCC values.

A wireless device 104₂Based on slave RAN node 102₂The received available uplink RCC value applies a certain number of uplink retransmissions. For determining duplicate transmissions on the uplinkMay be based on the slave network 100 (e.g., RAN node 102)₂) Received latest estimated uplink RCC value, wireless device 104 of uplink RCC value₂Estimating (e.g., based on downlink radio quality) or received uplink RCC value and/or wireless device 104₂A running average of the estimated uplink RCC values.

After initial deployment and power on (power on) of the wireless device 104 in the field₂With RAN node 102₂When making its first contact, or after a period of sleep, the wireless device 104₂Case when waking up to perform a system access procedure, the wireless device 104₂The number of repeated transmissions used in performing a random access procedure (e.g., sending a first message on a Random Access Channel (RACH), such as a channel request message on the RACH) may be based on (1) the wireless device's own independent evaluation of the appropriate uplink RCC value, or (2) the wireless device's pre-configured information of the appropriate uplink RCC value.

Network 100 (e.g., RAN node 102)₂) Based on wireless device 104₂The stored RCC of (1), apply a certain number of repetitions. This can be done, for example, at paging wireless device 104₂Or in response to a first message on a Random Access Channel (RACH), such as a channel request message on the RACH.

RAN node 102 in deciding whether to apply a certain number of repetitions based on the stored RCC value₂And a wireless device 104₂Knowledge of the type of use of the wireless device, e.g., as a fixed device, can be leveraged, which can be preconfigured at the wireless device 104₂And in subscription data, for example, in the network 100.

Referring to fig. 2, there is a signal flow diagram illustrating a downlink RCC value determination process conducted during a wireless device originated transmission in accordance with an embodiment of the present disclosure. At an access RAN node 102₂Front, wireless device 104₂Receiving (e.g., monitoring) some Radio Access Technology (RAT) -specific set of control channels, e.g., to obtain information with the RAN node 102₂In (see fig. 2 for synchronization of)Step 1). In a Global System for Mobile (GSM) scenario, the wireless device 104 is prior to accessing a GSM/EDGE radio access network (GERAN)₂The Synchronization Channel (SCH) and the Frequency Correction Channel (FCCH) will be monitored. After SCH decoding, the wireless device 104₂System Information (SI) transmitted on a Broadcast Control Channel (BCCH) may also be decoded. The SCH, FCCH and BCCH in GSM are continuously transmitted at full power.

Wireless device 104₂The received control channel is used to estimate the downlink radio conditions it experiences based on, for example, the Received Signal Strength Indicator (RSSI), the reception estimation quality (e.g., decoding quality of SCH and system information), or any other metric that estimates the downlink radio conditions of the wireless device (see step 2 of fig. 2).

Wireless device 104₂The estimated downlink radio condition is mapped to one of a plurality of downlink RCC values (see step 3 of fig. 2 and graph "a"). In this example, an RSSI-based mapping is shown in which an estimated RSSI value is mapped to one of four different downlink RCC values. It is noted that the number of downlink RCC values and the number of transmissions for each downlink RCC value shown in fig. 2 (i.e., 1 transmission for RCC 0, 2 transmissions for RCC 1, 4 transmissions for RCC2, and 16 transmissions for RCC 3) are provided as examples. In other cases, there may be fewer or more downlink RCC values, and/or different numbers of transmissions may be associated with the downlink RCC values.

Wireless device 104₂Communicating a message 202 including a downlink RCC value to RAN node 102₂(see step 4 of FIG. 2). More particularly, RAN node 102 is accessed for a certain wireless device originating data transmissions₂Then, the wireless device 104₂The downlink specific RCC value is provided in an appropriate RRC message 202 (e.g., a channel request message 202 in GERAN, an RRCConnectionRequest 202 in LTE or UMTS) or some message during the radio capability acquisition procedure. Wireless device 104 is described in U.S. patent application No.61/968,621 entitled "Accessed System Access Procedure (ASAP)" filed 3/21 2014₂Being able to communicate downlink-specific RCC values to RAN node 102₂(e.g., BSS 102)₂) The method (1). The contents of this document are hereby incorporated by reference.

RAN node 102₂Determining to be used for wireless device 104₂Downlink RCC value (see step 5 of fig. 2). RAN node 102₂The determination for the wireless device 104 can be based on₂Downlink RCC value of: (1) a received first downlink RCC value (e.g., the downlink RCC value of step 4 of fig. 2); (2) an estimated downlink RCC value (e.g., based on uplink radio conditions); or (3) a running average of previously received first downlink RCC values and/or previously estimated downlink RCC values. For example, RAN node 102₂May be based on use for the wireless device 104₂Estimates a downlink-specific RCC value, and may correlate this value with the uplink radio conditions of the wireless device 104₂Is itself determining to be used for the wireless device 104₂The estimated RCC value is combined with the downlink RCC value of (a). Further, by RAN node 102₂The particular algorithm used to determine the downlink RCC value used may depend on the implementation.

RAN node 102₂Mapping the determined downlink RCC value to be used for wireless device 104₂Of one or more downlink messages 205 (see step 6 of figure 2 and graph "a"; note: RAN node 102)₂The downlink RCC value received in step 4 of fig. 2 is also mapped to be used for transmission to the wireless device 104₂The number of repeated downlink transmissions of the downlink message 204). RAN node 102 then₂To the wireless device 104₂Transmitting based on slave wireless device 104₂Received downlink RCC value, e.g., immediate assignment message (see step 6a of fig. 2). If the RAN node determined downlink RCC value from step 5 of fig. 2 is different from the downlink RCC value of the wireless device in message 202, then message 204 will include the RAN node determined downlink RCC value from step 5 of fig. 2. RAN node 102 then₂To wireless deviceDevice 104₂The subsequent downlink message(s) 205 is transmitted with the number of repeated downlink transmissions based on the determined downlink RCC value of the RAN node (see step 7 of fig. 2). Basically, if the RAN node 102₂The decision to use is different from the wireless device 104 in step 4 of fig. 2₂A downlink RCC value of the transmitted downlink RCC values, RAN node 102₂Will transmit the determined downlink RCC value to the wireless device 104 by including the determined downlink RCC value in the first downlink message 204₂Indicating this value, the first downlink message 204 is always utilized according to which wireless device 104 in step 4 of fig. 2₂A repeated transmission of the transmitted downlink RCC value is transmitted.

It should be noted that this may depend, for example, on the wireless device 104 to be transmitted to₂The number of repetitions can be different for the logical channel associated with the downlink message 204 or 205. For example, in GERAN, the RAN node 102₂The first number of repetitions can be applied when the immediate assignment message 204 is transmitted on the Access Grant Channel (AGCH) according to the determined downlink RCC value, but the second number of repetitions is applied when the packet power control/timing advance message 205 is transmitted, for example, on the Packet Associated Control Channel (PACCH). Similarly, at RAN node 102₂The number of repetitions used for the signaling radio bearer may be different from the number used for the data radio bearer.

It should be noted that when using a repetition-based only scheme, and at multiple wireless devices 104₂、104₃And 104₄When addressed by the same message 204 or 205, for example, all wireless devices 104 are not present₂、104₃And 104₄The need to have the same downlink RCC value. The number of repetitions used may in turn be determined by, for example, the wireless device 104 with the highest downlink RCC value (i.e., worst coverage)₄And (4) determining. An example of this message format is shown in fig. 3, where the wireless device 104₂、104₃And 104₄Addressed by the same resource assignment message 204. In this example, due to the wireless device 104₄Will be in the same AGCH (mapping to 16 repetitions)The resource assignment message 204 above repeats 16 times while wireless devices 104 with lower coverage classes (i.e., less repetition is needed)₂And 104₃Will be able to be in a coverage class according to its RCC (i.e., for wireless device 104)₂4 repetitions of and for the wireless device 104₃8 repetitions), the same resource assignment message 204 is read.

In some embodiments, the same number of repeated transmissions according to the downlink RCC value of the wireless device (which can vary depending on the logical channel under consideration) may be applied to any subsequent downlink message 204, control or user plane message 204, until the RAN node 102₂Such as by wireless device 104₂Determination that different downlink RCC values should be used for wireless device 104 with the aid of provisioned ACK/NACK or measurement report information₂(see step 8 of FIG. 2). Any change in downlink RCC value (number of repeated transmissions) may be made by RAN node 102₂Explicit signaling by means of dedicated signaling in the control plane, or e.g. by to the wireless device 104₂Is implicitly signaled (see step 9 of fig. 2). Use of the value for wireless device 104 that it stored prior to deciding to make a change to the downlink RCC value when explicitly signaling a change to the downlink RCC value₂Is determined by RAN node 102₂The number of repeated transfers used. Similar to the downlink, RAN node 102₂Can estimate the current state of use for a given wireless device 104₂Is applicable to the uplink. This process is described next with respect to fig. 4.

Referring to fig. 4, there is a signal flow diagram illustrating an uplink RCC value determination process conducted during a wireless device originated transmission according to an embodiment of the present disclosure. RAN node 102₂Receiving data from a wireless device 104 on a RACH₂E.g., channel request message 202, RRC connection request message 202 (see step 1 of fig. 4). For when the wireless device 104₂With the RAN node 102 after initial deployment and field power-on of the wireless device₂When it is brought into contact for the first time,or when it wakes up after a period of sleep time to perform a system access procedure, the wireless device 104₂The number of repeated transmissions used when sending a RACH burst on the RACH for a channel request message 202 (RRC connection request message 202) may be based, for example, on the wireless device's own independent assessment of the appropriate uplink RCC value (e.g., based on the estimated downlink radio conditions of step 2 of fig. 2), or preconfigured information (see note 1 of fig. 4).

RAN node 102₂Based on the quality (e.g., RSSI) of the received message 202, an uplink RCC value is estimated (see step 2 and graph "a" of fig. 4). In this example, RSSI-based mapping measurements are shown in which an estimated RSSI value for the uplink radio condition associated with the received message 202 is mapped to one of four different uplink RCC values. It is noted that the number of uplink RCC values and the number of transmissions for the uplink RCC values shown in fig. 4 (i.e., 1 transmission for RCC 0, 2 transmissions for RCC 1, 4 transmissions for RCC2, and 16 transmissions for RCC 3) are provided as examples. In other cases, there may be fewer or more uplink RCC values, and/or different numbers of transmissions may be associated with uplink RCC values.

RAN node 102₂Adding (inserting, including) uplink RCC values to transmissions to a wireless device 104₂E.g., an immediate assignment message 204 or any other RRC message 204 following the channel request message 202 (see step 3 of fig. 4). To the wireless device 104₂May be, for example, RAN node 102₂Estimated last uplink RCC value, running average of previously estimated uplink RCC values, and/or for that particular wireless device 104₂Or the downlink RCC value used.

Wireless device 104₂The uplink RCC value is mapped into the number of uplink repetitions (see step 4 of fig. 4 and graph "a"). The wireless device 104 then terminates the connection before the connection is terminated₂On all subsequent uplink messages 206 transmitted on the RACH and to the RAN node 102₂Applies the number of uplink repetitions on the uplink of any subsequently assigned Packet Data Traffic Channel (PDTCH) or Packet Associated Control Channel (PACCH) (see step 5 of fig. 4). After the connection is terminated, if a subsequent uplink message 202 (see step 1 of fig. 4) transmitted on the RACH was transmitted within a finite time period following its most recent reception of the uplink RCC value in message 204, then wireless device 104₂It can optionally continue to use its stored uplink RCC value (see step 9 of fig. 4) for these messages.

Wireless device 104₂Continues to use the uplink RCC value for uplink messages 206 until from the RAN node 102₂The received new uplink RCC value (see step 6 of fig. 4). Wireless device 104₂The reception from the RAN node 102 can be, for example, in a control message or in an implicit manner (e.g., a packet uplink ACK/NACK message indicating failed uplink reception)₂New uplink RCC value.

RAN node 102₂RCC values applicable to both uplink and downlink may be combined with wireless device 104₂Is stored together with the Temporary Logical Link Identifier (TLLI) or other local correlation identifier (see step 7 of fig. 4; note that step 7 is also typically performed immediately after step 2, or as part of step 2). Then, at RAN node 102₂And wireless device 104₂At the termination of a connection (e.g., RRC connection) between RAN nodes 102₂RCC values applicable to both uplink and downlink may be combined with wireless device 104₂Together with the TLLI or other local correlation identifier, to the CN node 107 (see step 8 of figure 4). For example, RAN node 102 sends received message 206 of step 5 to CN 107₂Uplink and downlink RCC values can be included as supplemental information. Additionally or alternatively, wireless device 104₂The RCC values applicable to both uplink and downlink can be stored (see step 9 of fig. 4; note that step 9 can also be performed immediately after steps 1 and 4). In addition, the wireless device 104₂May be signaled, e.g., via NAS (e.g., at periodicity)Within a Routing Area Update (RAU) message) transmits the RCC values for both uplink and downlink to the CN node 107 (see step 10 of fig. 4). In this case, if the wireless device 104₂Performing step 10, the RAN node 102 sends the received message 206 of step 5 to the CN 107₂The uplink and downlink RCC values would not need to be included as supplemental information.

Referring to fig. 5, there is a signal flow diagram illustrating a process associated with a wireless device terminating a transmission according to an embodiment of the present disclosure. The CN node 107 is the RAN node 102 during subsequent wireless device terminated transmissions₂Provisioning for wireless device 104₂Uplink and downlink stored RCC values. More specifically, the payload becomes available to the wireless device 104 in the downlink₂The CN node 107 transmits a paging message 208 with stored RCC values for uplink and downlink (see step 1 of fig. 5). Remember: RAN node 102 ends the previous connection₂And/or wireless device 104₂The RCC values for the uplink and downlink are uploaded to the CN node 107 (see steps 8 and 10 of fig. 4).

The RCC values for both the uplink and downlink may be sent together in a paging message 208 with a time stamp indicating the time at which the RCC values have been uploaded to the CN node 107, and including information about the wireless device 104 at the time these RCC values were obtained₂Cell identifier information of a connected cell. This information and additional information if desired may also be provided in the paging message 208 to allow the RAN node 102 to₂The reliability of the downlink and uplink RCC values is evaluated. The RCC values for the downlink and uplink may be sent with paging messages 208 using the relevant interfaces, e.g., Gb, Iu, SIAP, etc.

RAN node 102₂(e.g., BSC 102 in 2G₂RNC 102 in 3G₂Or eNB 102 in LTE₂) The received downlink RCC value may be used to determine for transmission to the wireless device 104₂The number of paging repetitions of the paging message 208' (see step 2 of fig. 5). RAN node 102₂The paging message 208' is then transmitted to the wireless device 104 using the determined number of page repetitions₂(see step 3 of FIG. 5). Further, RAN node 102₂The uplink RCC value may be added to the paging message 208' itself and, thus, the wireless device 104₂Mapping and using a particular number of uplink repetitions during a triggered random access procedure to transmit a corresponding paging response 210 to a RAN node 102₂(see steps 4 and 5 of FIG. 5). Alternatively, RAN node 102₂Can determine that the RCC values received from the CN node 107 for the uplink and downlink are out of date, and in this case are sent to the wireless device 104₂May repeat the paging message 208' a maximum number of times and be communicated to the wireless device 104 in the paging message 208₂May be set to the highest value (i.e., the maximum number of repetitions) (see note 1 of fig. 5). Wireless device 104₂And RAN node 102₂May be the same as described above with reference to the wireless device initiating transmission in fig. 2-4.

Detailed technology of device implementation

Referring to fig. 6, therein is shown a wireless device 104 according to an embodiment of the disclosure₂A flow diagram of a method 600 implemented (for example). At step 602, the wireless device 104₂Receiving (e.g., monitoring) a certain RAT-specific set of control channels, e.g., to obtain information with RAN node 102₂Synchronization (see step 1 of fig. 2). In step 604, the wireless device 104₂Based on the signal quality (e.g., RSSI) of the received control channel, the downlink radio conditions are estimated (see step 2 of fig. 2). In step 606, the wireless device 104₂The estimated downlink radio condition is mapped to one of a plurality of downlink RCC values (see step 3 of fig. 2 and graph "a"). At step 608, the wireless device 104₂Communicating a message 202 (e.g., a channel request message 202) including a downlink RCC value to RAN node 102₂(see step 4 of FIG. 2). If the message 202 (channel request message 202) is a wireless device with the RAN node 102₂The first contact of, then, the wireless device 104₂May have previously been determined at step 608' to be transmitting the message 202 to the RAN node 102₂An estimated number of repeated uplink transmissions to be used (e.g., based on estimated downlink radio conditions or preconfigured information) (see note 1 of fig. 4).

In step 610, the wireless device 104₂A downlink message 204 (e.g., an immediate assignment message 204) is received having a number of times to repeat the downlink transmission and including an uplink RCC value (see step 7 of fig. 2 and step 3 of fig. 4). Remember: the number of times the downlink transmission is repeated in the downlink message 204 is based on the wireless device 104₂The downlink RCC value sent in message 202 (see step 4 of fig. 2 and step 1 of fig. 4). In addition, the message 204 may include the determined downlink RCC value of the RAN node to be used for a subsequent downlink message 205 (see step 6a of fig. 2). At step 612, the wireless device 104₂The uplink RCC value (included in message 204) is mapped to determine the number of uplink repetitions (see step 4 and chart "a" of fig. 4). At step 614, the wireless device 104₂Transmitting an uplink message 206 to the RAN node 102 that is repeated according to a number of times the uplink transmission is repeated₂(see step 5 of FIG. 4). Wireless device 104₂The uplink RCC value will continue to be used for subsequent uplink messages 206 until from the RAN node 102₂A new uplink RCC value is received (see step 6 of fig. 4). At step 616, the wireless device 104₂The RCC values applicable to both uplink and downlink are stored (see step 9 of fig. 4). In step 618, the wireless device 104₂The RCC values for both uplink and downlink may be communicated to the CN node 107 (see step 10 of fig. 4).

At step 620, the wireless device 104₂Receiving from RAN node 102₂Having a number of downlink repetitions and an uplink RCC value 208' (see step 3 of figure 5; bearing in mind that there is a paging message for the wireless device 104 at the CN node 107;)₂Will be sent, paging message 208'). Used in paging message 208May be based on the number of repeated downlink repetitions by the wireless device 104₂Or RAN node 102₂The downlink RCC value previously sent to the CN node 107 (see step 1-2 of figure 5) or the maximum number of downlink repetitions (see note 1 of figure 5). The uplink RCC value of the paging message 208' may be the wireless device 104₂Or RAN node 102₂The uplink RCC value previously sent to the CN node 107 (see step 1-2 of fig. 5) or the maximum number of uplink repetitions (see note 1 of fig. 5). In step 622, the wireless device 104₂Mapping uplink RCC values to determine when to communicate a corresponding paging response 210 to RAN node 102₂The uplink to be used is repeated a certain number of times (see step 4 of fig. 5). At step 624, the wireless device 104₂Communicating a paging response 210 to a RAN node 102 using a determined number of uplink repetitions₂(see step 5 of FIG. 5). For a more detailed discussion regarding steps 602, 604, 606, 608, 610, 612, 614, 616, 618, 620, 622, and 624, reference is made to fig. 2, 4, and 5.

Referring to fig. 7, a configuration with RAN node 102 is shown in accordance with an embodiment of the present disclosure₂Exemplary Wireless device 104 interacting with CN node 107₂A block diagram of the structure of (1). In an embodiment, the wireless device 104₂May include a first receiving module 702, an estimating module 704, a first mapping module 706, a first transmitting module 708, a second receiving module 710, a second mapping module 712, a second transmitting module 714, a storage module 716, a third transmitting module 718, a third receiving module 720, a third mapping module 722, and a fourth transmitting module 724.

The first receiving module 702 is configured to receive (e.g., monitor) a certain RAT-specific set of control channels, e.g., to obtain information with the RAN node 102₂Synchronization of the radio interface (see step 1 of fig. 2). The estimation module 704 is configured to estimate the downlink radio conditions based on the signal quality (e.g. RSSI) of the received control channel (see step 2 of fig. 2). The first mapping module 706 is configured to map the estimated downlink radio condition to one of a plurality of downlink RCC values (see steps of fig. 2)3 and graph "a"). The first transmission module 708 is configured to transmit a message 202 (e.g., a channel request message 202) including a downlink RCC value to the RAN node 102₂(see step 4 of FIG. 2). The first transmission module 708 may include a determination module 708', the determination module 708' configured to determine if the message 202 (e.g., the channel request message 202) is a wireless device and the RAN node 102₂Is determined to be transmitting the message 202 to the RAN node 102₂An estimated number of repeated uplink transmissions to be used (e.g., based on estimated downlink radio conditions or preconfigured information) (see note 1 of fig. 4).

The second receiving module 710 is configured to receive a downlink message 204 (e.g., an immediate assignment message 204), the downlink message 204 having a number of repeated downlink transmissions and including an uplink RCC value (see step 7 of fig. 2 and step 3 of fig. 4). Remember: the number of times the downlink transmission is repeated in the downlink message 204 is based on the wireless device 104₂The downlink RCC value sent in message 202 (see step 4 of fig. 2 and step 1 of fig. 4). In addition, the message 204 may include the determined downlink RCC value of the RAN node to be used for a subsequent downlink message 205 (see step 6a of fig. 2). The second mapping module 712 is configured to map the uplink RCC value (included in message 204) to determine the number of uplink repetitions (see step 4 and diagram "a" of fig. 4). The second transmitting module 714 is configured to transmit the uplink message 206 having the estimated number of repeated uplink transmissions to the RAN node 102₂(see step 5 of FIG. 4). The second transport module 714 will continue to use the uplink RCC value for subsequent uplink messages 206 until from the RAN node 102₂A new uplink RCC value is received (see step 6 of fig. 4). The storage module 716 is configured to store RCC values applicable to both uplink and downlink (see step 9 of fig. 4). The third transmitting module 718 is configured to transmit the RCC values for both uplink and downlink to the CN node 107 (see step 10 of fig. 4).

The third receiving module 720 is configured to receive a signal from the RAN node 102₂With the number of downlink repetitions and the uplink RCC value of (see step 3 of figure 5; bearing in mind that the paging message 208' will be sent when the CN node 107 has a new downlink payload for the wireless device 1042). The number of repeated downlink repetitions used in the paging message 208' may be based on the downlink RCC value previously sent by the wireless device 1042 or RAN node 1022 to the CN node 107 (see step 1-2 of fig. 5) or the maximum number of downlink repetitions (see note 1 of fig. 5). The uplink RCC value in the paging message 208' may be the uplink RCC value previously sent by the wireless device 1042 or RAN node 1022 to the CN node 107 (see step 1-2 of fig. 5) or the maximum number of uplink repetitions (see note 1 of fig. 5). The third mapping module 722 is configured to map uplink RCC values to determine when to communicate a corresponding page response 210 to the RAN node 102₂The uplink to be used is repeated a certain number of times (see step 4 of fig. 5). The fourth transmitting module 724 is configured to transmit the page response 210 to the RAN node 102 using the determined number of uplink repetitions₂(see step 5 of FIG. 5).

As will be appreciated by those skilled in the art, the wireless device 104₂The above-described modules 702, 704, 706, 708, 710, 712, 714, 716, 718, 720, 722, and 724, respectively, may be implemented individually as suitable dedicated circuitry. Further, modules 702, 704, 706, 708, 710, 712, 714, 716, 718, 720, 722, and 724 can also be implemented using any number of dedicated circuits, either in combination or separately, in their functions. In some embodiments, modules 702, 704, 706, 708, 710, 712, 714, 716, 718, 720, 722, and 724 may even be combined in a single Application Specific Integrated Circuit (ASIC). As an alternative software-based implementation, wireless device 104₂May include a memory 120₂And a processor 118₂(including but not limited to a microprocessor, microcontroller, or Digital Signal Processor (DSP), etc.) and a transceiver 110₂. Memory 120₂Storage by processor 118₂Executable to cause a wireless device 104₂Machine readable program code for performing the steps of the method 600 described above.

Referring to FIGS. 8A-8B, therein are shownAt RAN node 102 according to embodiments of the present disclosure₂A flow diagram of a method 800 implemented (for example). At step 802, the RAN node 102₂Transmitting control channels (e.g., BCCH, SCH, FCCH) for wireless device 104₂For example, obtain with RAN node 102₂Synchronization (see step 1 of fig. 2). At step 804, the RAN node 102₂Receiving from the wireless device 104₂A message 202 (e.g., a channel request message 202) including the downlink RCC value of the wireless device (see step 4 of fig. 2). At step 806, the RAN node 102₂Determining to be used for wireless device 104₂Downlink RCC value (see step 5 of fig. 2). At step 808, the RAN node 102₂Mapping the determined downlink RCC value to a value to be used for transmission to the wireless device 104₂Of the downlink message(s) 205 (see step 6 of fig. 2 and graph "a"; note: RAN node 102)₂The downlink RCC values received in step 804 of fig. 8 are also mapped to be used for transmission to the wireless device 104₂The number of repeated downlink transmissions of the downlink message 204). At step 809, the RAN node 102₂Communicating a first downlink message 204 (e.g., an immediate assignment message 204) to a wireless device 104₂(see step 7 of fig. 2), where the number of repeated downlink transmissions for the downlink message 204 is based on the wireless device 104₂The downlink RCC value sent in message 202 (see step 4 of fig. 2). If RAN node 102₂The decision to use is different from the decision to use from the wireless device 104 in step 804₂A downlink RCC value of the received downlink RCC values, RAN node 102₂Will include the determined downlink RCC value from step 806 in the first downlink message 204 to the wireless device 104₂The value is indicated. Subsequently, at step 810, by RAN node 102₂Communicating a subsequent downlink message 205 to the wireless device 104 based on the downlink RCC value determined from step 806₂. At step 812, the RAN node 102₂Such as by wireless device 104₂Provisioned ACK/NACK or measurement report messagesWith the assistance of information, it is determined that a new downlink RCC value should be used for wireless device 104₂(see step 8 of FIG. 2). At step 814, RAN node 102₂Communicating a new downlink RCC value (number of repeated transmissions) to the wireless device 104₂(see step 9 of FIG. 2). Using the RAN node 102 before deciding to use a new downlink RCC value₂Is already a wireless device 104₂Stored downlink RCC values to determine RAN node 102₂Number of repeated transmissions containing new downlink RCC values.

At step 816, the RAN node 102₂When a message 202 (e.g., a channel request message 202) is received at step 804, an estimate will also be made for the wireless device 104 based on the quality (e.g., RSSI) of the received message 202₂Uplink RCC value (see step 2 and graph "a" of fig. 4). At step 818, RAN node 102₂Adding (inserting, including) the estimated uplink RCC value to the transmission to one wireless device 104 during step 810₂Message 204 (e.g., immediate assignment message 204) (see step 3 of fig. 4). At step 820, the RAN node 102₂Receiving from the wireless device 104₂With a number of repeated uplink transmissions corresponding to the uplink RCC value sent in message 204 (see step 5 of fig. 4). At step 822, RAN node 102, if needed₂Communicating the new downlink RCC value to the wireless device 104₂(see step 6 of FIG. 4). At step 824, RAN node 102₂Combining RCC values applicable to both uplink and downlink with wireless device 104₂Is stored together with the TLLI or other local correlation identifier (see step 7 of figure 4). At step 826, at the wireless device 104₂With RAN node 102₂At the termination of the connection between, RAN node 102₂RCC values applicable to both uplink and downlink may be combined with wireless device 104₂Together with the TLLI or other local correlation identifier, to the CN node 107 (see step 8 of figure 4).

At step 828, the payload becomes available for wireless at the downlinkDevice 104₂RAN node 102₂Receive information from the CN node 107 with information for the wireless device 104₂Paging message 208 of the RCC values of uplink and downlink (see step 1 of fig. 5). At step 830a, the RAN node 102₂The received downlink RCC value may be used to determine for transmission to the wireless device 104₂The number of paging repetitions of the paging message 208' (see step 2 of fig. 5). At step 832a, RAN node 102₂Communicating a paging message 208' (including an uplink RCC value) to the wireless device 104 using the determined number of paging repetitions₂(see step 3 of FIG. 5). At step 834a, the RAN node 102₂Receiving from the wireless device 104₂Paging response 210, paging response 210 having a number of repeated uplink transmissions based on the uplink RCC value in paging message 208' (see step 5 of fig. 5). Alternatively, after step 828, the RAN node 102, at step 830b₂It is determined that the RCC values received from the CN node 107 for the uplink and downlink are out of date, in which case it is transmitted to the wireless device 104 at step 834b₂May repeat the paging message 208' a maximum number of times and be communicated to the wireless device 104 in the paging message 208₂May be set to the highest RCC value (i.e., the maximum number of repetitions) (see note 1 of fig. 5). It should be noted that, in practice, the wireless device 104₂It will typically listen according to the last downlink RCC value it delivered to the network 100, and thus it may be possible for the RAN node 102₂Autonomous decision to use the maximum number of repetitions does not help much. At step 834b, the RAN node 102₂Receiving from the wireless device 104₂The paging response 210, the paging response 210 having a highest number of repeated uplink transmissions based on a highest uplink RCC value.

Referring to fig. 9, a diagram illustrating a wireless device 104 configured to communicate with according to an embodiment of the present disclosure₂Exemplary RAN node 102 interacting with CN node 107₂A block diagram of the structure of (1). In an embodiment, RAN node 102₂May include a first transmitting module 902, a first receiving module 904, a first determining module 906, a mapping module 908, a second transmitting module, a second receiving module, a third receiving module, a fourth receiving module, a fifth receiving module, a sixth receiving module, a fifthA transmit module 909, a third transmit module 910, a second determine module 912, a fourth transmit module 914, an estimate module 916, an add module 918, a second receive module 920, a fifth transmit module 922, a storage module 924, a sixth transmit module 926, a third receive module 928, a use module 930a, a seventh transmit module 932a, a fourth receive module 934a, a third determine module 930b, an eighth transmit module 932b, and a fifth receive module 934 b.

The first receiving module 902 is configured to transmit control channels (e.g., BCCH, SCH, FCCH) for the wireless device 104₂Can, for example, obtain information with RAN node 102₂Synchronization (see step 1 of fig. 2). The first receiving module 904 is configured to receive signals from the wireless device 104₂A message 202 (e.g., a channel request message 202) including the downlink RCC value of the wireless device (see step 4 of fig. 2). The first determination module 996 is configured to determine to be used for the wireless device 104₂Downlink RCC value (see step 5 of fig. 2). The mapping module 908 is configured to map the determined downlink RCC value to one of a plurality of downlink RCC values to determine to use for transmission to the wireless device 104₂Of the downlink message(s) 204 (see step 6 of fig. 2 and graph "a"; note: the mapping module 908 also maps the downlink RCC value received in step 4 of fig. 2 to a value to be used for transmission to the wireless device 104₂The number of repeated downlink transmissions of the downlink message 204). The second transmitting module 909 is configured to transmit a first downlink message 204 (e.g., an immediate assignment message 204) to the wireless device 104₂(see step 7 of fig. 2), where the number of repeated downlink transmissions for the downlink message 204 is based on the wireless device 104₂The downlink RCC value sent in message 202 (see step 4 of fig. 2) (see step 6a of fig. 2). If the first determination module 906 decides to use a different wireless device 104 than the wireless device₂A downlink RCC value of the transmitted downlink RCC values, the second transfer module 909 will transmit the determined downlink RCC value to the wireless device 104 by including the determined downlink RCC value in the first downlink message 204₂The value is indicated. Third passThe sending module 910 is configured to transmit a subsequent downlink message 205 to the wireless device 104 based on the determined downlink RCC value₂(see step 7 of FIG. 2). The second determination module 912 is configured, for example, by the wireless device 104₂Determination that a new downlink RCC value should be used for wireless device 104 with the aid of provisioned ACK/NACK or measurement report information₂(see step 8 of FIG. 2). The fourth transmitting module 914 is configured to transmit a new downlink RCC value (number of repeated transmissions) to the wireless device 104₂(see step 9 of FIG. 2). Using the RAN node 102 before deciding to use a new downlink RCC value₂Is already a wireless device 104₂Stored downlink RCC values to determine RAN node 102₂Number of repeated transmissions containing new downlink RCC values.

The estimation module 916 is configured to estimate, upon receiving a message 202 (e.g., a channel request message 202), a quality (e.g., RSSI) for the wireless device 104 based on the received message 202₂Uplink RCC value (see step 2 and graph "a" of fig. 4). The adding module 918 is configured to add (insert, include) the estimated uplink RCC value to a transmission to one wireless device 104₂Message 204 (e.g., immediate assignment message 204) (see step 3 of fig. 4). The second receiving module 920 is configured to receive data from the wireless device 104₂At least one uplink message 206, the at least one uplink message 206 having a number of repeated uplink transmissions corresponding to the uplink RCC value sent in message 204 (see step 5 of fig. 4). A fifth transmitting module 922 is configured to transmit the new uplink RCC value to the wireless device 104, if needed₂(see step 6 of FIG. 4). Storage module 924 is configured to associate RCC values applicable to both uplink and downlink with wireless device 104₂Is stored together with the TLLI or other local correlation identifier (see step 7 of figure 4). The sixth transmitting module 926 is configured to be at the wireless device 104₂With RAN node 102₂The RCC values applicable to both the uplink and downlink along with the wireless device 104 when the connection between them is terminated₂TLLI or other localThe correlation identifier is transmitted to the CN node 107 together (see step 8 of fig. 4).

The third receive module 928 is configured to become available to the wireless device 104 when a downlink payload becomes available₂Receive data from the CN node 107 with data for the wireless device 104₂Paging message 208 of the RCC values of uplink and downlink (see step 1 of fig. 5). The usage module 930a is configured to determine, using the received downlink RCC value, for transmission to the wireless device 104₂The number of paging repetitions of the paging message 208' (see step 2 of fig. 5). The seventh transmitting module 932a is configured to transmit the paging message 208' (which includes the uplink RCC value) to the wireless device 104 using the determined number of paging repetitions₂(see step 3 of FIG. 5). The fourth receiving module 934a is configured to receive signals from the wireless device 104₂Paging response 210, paging response 210 having a number of repeated uplink transmissions based on the uplink RCC value in paging message 208' (see step 5 of fig. 5). As an alternative to modules 930a, 932a, and 934a, RAN node 102₂Including a third determining module 930b, the third determining module 930b being configured to determine that the RCC values received from the CN node 107 for the uplink and downlink are out of date, an eighth transmitting module 932b configured to transmit the paging message 208' to the wireless device 104 a maximum number of repetitions₂Wherein the paging message 208' may include the uplink RCC value (i.e., the maximum number of repetitions) set to the highest RCC value (see note 1 of fig. 5). The fifth receiving module 934b is configured to receive signals from the wireless device 104₂The paging response 210, the paging response 210 having a highest number of repeated uplink transmissions based on a highest uplink RCC value.

As will be appreciated by those skilled in the art, the RAN node 102₂The above-described modules 902, 904, 906, 908, 909, 910, 912, 914, 916, 918, 920, 922, 924, 926, 928, 930a, 930b, 932a, 932b, 934a, and 934b, described above, may be implemented individually as suitable dedicated circuitry. Furthermore, modules 902, 904, 906, 908, 909, 910, 912, 914, 916, 918, 920, 922, 924, 926, 928, 930a, 930b, 932a, 932b, 934a, and 934b can also be configured by functional groupsThe joining or separating is implemented using any number of dedicated circuits. In some embodiments, modules 902, 904, 906, 908, 909, 910, 912, 914, 916, 918, 920, 922, 924, 926, 928, 930a, 930b, 932a, 932b, 934a, and 934b may even be combined in a single Application Specific Integrated Circuit (ASIC). As an alternative software-based implementation, RAN node 102₂May include a memory 134₂Processor 132₂(including but not limited to a microprocessor, microcontroller, or Digital Signal Processor (DSP), etc.) and a transceiver 122₂. Memory 134₂Storage is by processor 132₂May be executed to enable the RAN node 102₂Machine readable program code for performing the steps of the method 800 described above.

Referring to fig. 10, there is a flow chart of a method 1000 implemented in the CN node 107 according to an embodiment of the present disclosure. At step 1002, at the wireless device 104₂With RAN node 102₂After the connection between the CN node 107 and the wireless device 104 is terminated, the CN node 107 receives the connection from the wireless device 104₂And RAN node 102₂RCC values for one or both of the uplink and downlink (see steps 8 and 10 of fig. 4). In step 1004, the CN node 107 stores the downlink RCC value and the uplink RCC value associated with the one wireless device. In step 1006, the downlink payload becomes available to the wireless device 104₂The CN node 107 towards the RAN node 102₂Transport band for wireless device 104₂Paging message 208 of the RCC values of uplink and downlink (see step 1 of fig. 5). The RCC values for both the uplink and downlink may be sent together in a paging message 208, the paging message 208 with a time stamp indicating the time at which the RCC values have been uploaded to the CN node 107 and information about the wireless device 104 at the time these RCC values were obtained₂Cell identifier information of a connected cell. This information and additional information if desired may also be provided in the paging message 208 to enable the RAN node 102₂The reliability of the downlink and uplink RCC values is evaluated.

Referring to fig. 11, a diagram illustrating a wireless device 104 configured to communicate with a wireless device according to an embodiment of the present disclosure₂And RAN node 102₂A block diagram of the structure of an exemplary CN node 107 interacting. In an embodiment, the CN node 107 may comprise a receiving module 1102, a storing module 1104, and a transmitting module 1106. The receiving module 1102 is configured to be at the wireless device 104₂With RAN node 102₂After the connection between the wireless devices 104 is terminated, the connection is received from the wireless device₂And RAN node 102₂RCC values for one or both of the uplink and downlink (see steps 8 and 10 of fig. 4). The storage module 1104 is configured to store a downlink RCC value and an uplink RCC value associated with the one wireless device. The transmission module 1104 is configured to become available to the wireless device 104 when the downlink payload becomes available₂Towards the RAN node 102₂Transport band for wireless device 104₂Paging message 208 of the RCC values of uplink and downlink (see step 1 of fig. 5). The RCC values for both the uplink and downlink may be sent together in a paging message 208, the paging message 208 with a time stamp indicating the time at which the RCC values have been uploaded to the CN node 107 and information about the wireless device 104 at the time these RCC values were obtained₂Cell identifier information of a connected cell. This information and additional information, if desired, may also be provided in the paging message 208 for the RAN node 102 to use₂The reliability of the downlink and uplink RCC values is evaluated.

As will be appreciated by those skilled in the art, the above-described modules 1102, 1104 and 1106 of the CN node 107 may be implemented individually as suitable dedicated circuitry. Further, modules 1102, 1104, and 1106 can also be implemented using any number of dedicated circuits, either in functional combination or separately. In some embodiments, modules 1102, 1104, and 1106 may even be combined in a single Application Specific Integrated Circuit (ASIC). As an alternative software-based implementation, the CN node may include a memory 148, a processor 146 (including but not limited to a microprocessor, a microcontroller or a Digital Signal Processor (DSP), etc.), and a transceiver 136. The memory 148 stores machine readable program code executable by the processor 146 to cause the CN node 107 to perform the steps of the method 1000 described above.

EC-GSM dynamic overlay class update

3GPP TSG-GERAN conference #62 referred to above, approvedA workitem description GP-140421 entitled "New Study Item on cellular System Support for Ultra Low force and Low thread Internet of things" is described. One of the main goals of this work item is to increase coverage when compared to existing GPRS services. The following description generally ensures that the CN node 107 (e.g., SGSN 107) is always directed to the RAN node 102₂(e.g., BSS 102)₂) Sending the paging message 208 indication is sufficient (equal to or higher than by the wireless device 104)₂Estimated) cause RAN node 102 to₂Successfully paging a wireless device 104₂Of the downlink coverage class. In particular, FIGS. 12-14 illustrate a wireless device 104₂RAN node 102₂And the steps performed by the CN node 107 to implement this new procedure (note: figures 12, 13 and 14 are the same as figures 4, 6 and 10, but for further steps associated with this new procedure (see bold text)). Even though the following discussion is in the context of EC-GSM (GSM operation supporting extended coverage packet data channels when compared to traditional GSM network operation), the solution described herein may be applicable to other types of wireless communication systems, including, for example, WCDMA, LTE, and WiMAX systems.

1. Determination of paging groups

Paging an EC-GSM wireless device 104₂In order to determine the particular group of EC-PCH blocks to use for sending paging messages 208', RAN node 102₂(e.g., BSS 102)₂) Firstly, it is required to know:

eDRX cycle

A downlink coverage class (DL CC), and

a wireless device 104₂The IMSI of (1).

Downlink CC (Downlink RCC value) by wireless device 104₂Estimated and passed to the network 100 (CN node 107). RAN node 102 then₂Receives a downlink CC (downlink RCC value) from CN node 107 and uses it to determine that paging message 208' is being sent to wireless device 104₂In order for the network 100 to identify the wireless device 104₂The number of paging resources (EC-PCH blocks) required to be transmitted.

Even if the EC-GSM device 104 is expected₂Providing the CN node 107 (e.g., SGSN 107) with its estimated DL CC (downlink RCC value) within the context of, for example, RAU procedures, there is also still a wireless device 104 at any time between any two such consecutive procedures₂The likelihood that its estimated DL CC (downlink RCC value) will be altered (see step 11 of fig. 12 and step 1302 of fig. 13). This modification of DL CCs will be discussed in more detail below.

2. Method for updating DL coverage classes

2.1 Pre-paging group update of DL CC

Whenever the wireless device 104₂Such that it will not be able to decode the paging message 208' using the DL coverage class (downlink RCC value) last provided to the CN node 107 (e.g., SGSN 107), proposes to use a cell update procedure that requires only a single RLC data block to be transmitted with the new downlink RCC value, and thus is a power efficient way of triggering a DL CC update in the CN node 107 (e.g., SGSN 107) (see step 12 of fig. 12, step 1304 of fig. 13, and step 1402 of fig. 14).

In addition, to reduce interference at the wireless device 104₂Possibility of excessive signaling with a CN node 107 (e.g., SGSN 107), the wireless device 104 performs a cell update to convey its new DL CC (downlink RCC value) to the CN node 107 (e.g., SGSN 107)₂Can wait until shortly (e.g., 5 seconds) before the next occurrence of its nominal (nominal) paging group (i.e., based on its current DL CC).

In addition, the wireless device 104 is enabled₂Waiting until just before the next occurrence of its nominal paging group to finally decide that its DL CC needs to be changed, which ensures that as few cell updates as possible will be used. Whenever the wireless device 104₂Change to a higher coverage class (requiring more blind repetitions) for wireless device 104₂The paging message 208' that can be sent using its nominal paging group can be read (with a high probability) using this solution. This does not guarantee that the wireless device 104 is₂Will always be able to read for useThe paging message 208 'sent by the nominal paging group indicated by its most recently transmitted cell update, but will reduce the likelihood of missing the paging message 208' to the extent that a secondary paging mechanism is not necessary.

2.2 transaction time update for DL CC

Whenever the DL coverage class (downlink RCC value) has improved, the EC-GSM device 104 is enabled₂It would be possible to decode the paging message 208' with a smaller number of repetitions, without in principle having to update the DL coverage class by the CN node 107 (e.g., SGSN 107) just before paging unless paging bandwidth needs to be saved. In this case, the wireless device 104₂It is possible to wait until the next uplink transaction to inform the CN node 107 (e.g., SGSN 107) of the new DL CC instead of performing a cell update shortly before its next nominal paging group as described earlier. This is possible for the following reasons: wireless device 104₂Reading the paging message 208' using its current DL CC (downlink RCC value) can be safely continued because the wireless device 104₂The currently existing coverage classes are better than the coverage classes currently envisaged by the CN node 107 (e.g., SGSN 107).

Wireless device 104₂The most straightforward way to provide the CN node 107 (e.g., SGSN 107) with a new DL coverage class (downlink RCC value) is to modify the UL-UNITDATA PDU that conveys the wireless device's LLC-PDU and its associated radio interface information across the Gb interface. This implementation is possible for the following reasons: whenever the EC-GSM device 104₂Access network 100, which sends RACH request 202 (e.g., channel request message 202) including an indication of its estimated DL CC (downlink RCC value) to RAN node 102₂For RAN node 102₂(e.g., BSS 102)₂) It is possible to properly assign resources and send an immediate assignment message 204 with the proper number of repetitions (see steps 4 and 7 of fig. 2). This means that whenever the EC-GSM wireless device 104 is in operation₂Sending uplink data to RAN node 102₂(e.g., BSS 102)₂) It may add the latest overlay class information to the UL-UNITDATA PDU (reference to SGSN 107) that it sends to CN node 107 (e.g., SGSN 107)See step 12 of fig. 12, step 1304 of fig. 13, and step 1402 of fig. 14).

3. Conclusion

To ensure that CN node 107 (e.g., SGSN 107) is always directed to RAN node 102₂(e.g., BSS 102)₂) Sending a paging message 208 indicating that it is sufficient (equal to or higher) to have the RAN node 102₂(e.g., BSS 102)₂) Wireless device 104 capable of successful paging in extended coverage₂The downlink coverage class (downlink RCC value) can be adjusted for both pre-paging group update and transaction time downlink solutions of the downlink coverage class as discussed above.

In view of the foregoing, the present disclosure provides for basing the present disclosure on wireless devices 104₂For example, an exchange of uplink and downlink radio condition information, called Radio Coverage Class (RCC), between the network 100 for use by data transfer (e.g., control plane related signaling or user plane related payload transfer) to enhance radio coverage. The disclosed techniques are based on the discovery that the network 100 and the wireless device 104 are in a single location₂For applying a certain number of repeated transmissions (e.g. a predefined number) of estimated RCC values over the radio interface. May be downlink (e.g., from wireless device 104)₂Angle) and estimates an RCC value for the uplink (e.g., from the network 100 perspective). The RCC value may be stored at the relevant network node 102₂And 107 (for example) and in wireless device 104₂For use in determining an appropriate number of repeated transmissions for subsequent data transmissions, e.g., at a paging occasion. Some aspects of the disclosure that have been described herein include:

initial deployment and boot scenario, where the wireless device 104₂Determining, e.g., using information of its evaluation or pre-configuration of downlink radio conditions, that wireless device 104 when its earliest first channel request message 202 is transmitted on the RACH₂The number of repeated transfers that should be used.

Use channel request message 202 (RRC connection request on uplink or any control plane)Surface or user plane messaging) indicates to the wireless device 104₂Has been determined to be applicable to the wireless device 104₂Conveys the RCC value of (e.g., AGCH or PDTCH). RAN node 102₂The RCC value for downlink transmission may be from the wireless device 104, for example₂A last received RCC value, an estimated RCC value (e.g., based on uplink radio conditions), or a running average of received and/or estimated RCC values. The particular algorithm used to determine the downlink RCC value used may depend on the implementation. The downlink RCC value may represent different numbers of repetitions depending on the logical channel or radio bearer used.

Using sending on the downlink to a given wireless device 104₂Assignment message 204 or any control plane or user plane messaging, for example, instructs RAN node 102₂For example, has determined to be applicable to use by the wireless device 104₂An RCC value for a subsequent uplink message transmission (e.g., RACH or PDTCH) made. This RCC value may represent different numbers of repetitions depending on the logical channel used. The RCC value used to determine the number of times to repeat a transmission on the uplink may be based on the most recently estimated uplink RCC value received from network 100, a wireless device estimate of the uplink RCC value (e.g., based on downlink radio quality), or a running average of the received and/or wireless device estimated uplink RCC values.

The techniques disclosed herein have some of the following many advantages:

allows for a reduction in the amount of data transfer between the RAN node and the wireless device.

Reduce the power consumption of the wireless device and thus improve battery life.

Improve the reliability of data delivery.

Reduce the interference level in the network.

Increase system capacity.

Since many of the wireless devices intended for MTC are fixed, the disclosed techniques of RCC value estimation and transfer between the wireless device and the network may be effective in ensuring efficient utilization of radio resources while still allowing the possibility of modifying applicable RCC values if this becomes necessary.

Those skilled in the art will appreciate that the use of the term "exemplary" is used herein to mean "illustrative" or "serving as an example," and is not intended to imply that a particular embodiment is preferred over another embodiment or that a particular feature is required. Similarly, unless the context clearly dictates otherwise, the terms "first" and "second" and similar terms are used only to distinguish one particular instance of an item or feature from another, and do not indicate a particular order or arrangement. Further, as used herein, the term "step" means an agreement with "operation" or "action". Unless the context or details of the described operations clearly indicate, any description herein of a sequence of steps does not imply that these operations must be performed in a particular order, or even that these operations are performed in any order at all.

The present disclosure may, of course, be carried out in other specific ways than those herein set forth without departing from the scope and essential characteristics of the invention. One or more of the specific processes discussed above may be performed in a cellular telephone or other communications transceiver that includes one or more suitably configured processing circuits, which in some embodiments may be implemented in one or more Application Specific Integrated Circuits (ASICs). In some embodiments, these processing circuits may include one or more microprocessors, microcontrollers, and/or digital signal processors programmed with appropriate software and/or firmware to perform one or more of the operations described above or variations thereof. In some embodiments, these processing circuits may include custom hardware to perform one or more of the functions described above. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive.

Although several embodiments of the present disclosure have been illustrated in the accompanying drawings and described in the foregoing detailed description, it should be understood that the invention is not limited to the embodiments disclosed, but is capable of numerous rearrangements, modifications and substitutions without departing from the present disclosure as set forth and defined by the following claims.