Method and device for reducing DC/CA establishment time
阅读说明:本技术 减少dc/ca建立时间的方法及其装置 (Method and device for reducing DC/CA establishment time ) 是由 蔡俊帆 张园园 于 2020-01-21 设计创作,主要内容包括:本公开的各方面提供了用于无线电资源控制的方法和装置。例如,一种装置包括收发器电路和处理电路。所述收发器电路被配置为发送和接收无线信号。所述处理电路被配置为,在所述装置处于节能模式时控制所述收发器电路执行对网络系统提供的潜在载波的测量,以用于处于连接模式下的所述装置的通信使用。然后,所述处理电路在所述装置从所述节能模式过渡到所述连接模式之前并经由所述收发器电路向所述网络系统提供所述潜在载波的所述测量的结果。此外,在所述连接模式下,所述处理电路接收所述网络系统基于所述潜在载波的所述测量的所述结果而确定的载波配置信息。(Aspects of the present disclosure provide methods and apparatus for radio resource control. For example, an apparatus includes a transceiver circuit and a processing circuit. The transceiver circuit is configured to transmit and receive wireless signals. The processing circuitry is configured to control the transceiver circuitry to perform measurements of potential carriers provided by a network system for communication use by the apparatus in a connected mode when the apparatus is in a power saving mode. The processing circuit then provides the results of the measurements of the potential carrier to the network system and via the transceiver circuit before the apparatus transitions from the power-saving mode to the connected mode. Further, in the connected mode, the processing circuitry receives carrier configuration information determined by the network system based on the results of the measurements of the potential carriers.)
1. A method for radio resource management, comprising:
performing, by a user equipment in a power saving mode, a measurement of a potential carrier provided by a network system;
providing results of the measurements of the potential carrier from the user equipment to the network system during a transition of the user equipment from the power saving mode to a connected mode; and
receiving, by the user equipment in the connected mode, carrier configuration information determined by the network system based on the result of the measurement of the potential carrier.
2. The method of claim 1, further comprising:
receiving, by the user equipment in the power saving mode, a message from the network system, the message including an indicator indicating a request for the result of the measurement of the potential carrier; and
sending a response message comprising the result of the measurement of the potential carrier, the request for the result of the measurement of the potential carrier.
3. The method of claim 1, further comprising:
the user equipment in the power saving mode switching on transceiver circuitry to perform the measurement of the potential carrier; and
after the measuring, the user equipment in the power saving mode disconnects the transceiver circuitry.
4. The method of claim 3, further comprising:
the user equipment in the power saving mode periodically switches the transceiver circuitry on or off to perform the measurements of the potential carriers.
5. The method of claim 1, further comprising:
receiving information of the potential carrier in a release message sent from the network system to the user equipment before the user equipment enters the power saving mode.
6. The method of claim 1, further comprising:
receiving information of the potential carrier as broadcasted and received system information when the user equipment is in the power saving mode.
7. The method of claim 1, further comprising:
reconfiguring at least one of a primary and secondary serving cell and/or a secondary serving cell based on the carrier configuration information.
8. An apparatus, comprising:
a transceiver circuit configured to transmit and receive wireless signals; and
a processing circuit configured to:
control the transceiver circuitry to perform measurements of potential carriers provided by a network system while the apparatus is in a power saving mode;
providing results of the measurements of the potential carrier to the network system during a transition of the apparatus from the power-saving mode to a connected mode and via the transceiver circuitry; and
in the connected mode, receiving carrier configuration information determined by the network system based on the result of the measurement of the potential carrier.
9. The apparatus of claim 8, wherein the processing circuit is configured to:
receive, via the transceiver circuit, a message from the network system while the apparatus is in the power saving mode, the message comprising an indicator indicating a request for the result of the measurement of the potential carrier; and
sending, via the transceiver circuitry, a response message including the result of the measurement of the potential carrier, the request for the result of the measurement of the potential carrier.
10. The apparatus of claim 8, wherein the processing circuit is configured to:
switch on the transceiver circuitry to perform the measurement of the potential carrier when the apparatus is in the power saving mode; and
after the measurement, the transceiver circuit is disconnected.
11. The apparatus of claim 10, wherein the processing circuit is configured to:
periodically turning on or off the transceiver circuitry to perform the measurement of the potential carrier while the apparatus is in the power saving mode.
12. The apparatus of claim 8, wherein the processing circuit is configured to:
receiving information of the potential carrier in a release message sent from the network system to the apparatus before the apparatus enters the power saving mode.
13. The apparatus of claim 8, wherein the processing circuit is configured to:
receiving information of the potential carrier as broadcasted and received system information when the apparatus is in the power saving mode.
14. The apparatus of claim 8, wherein the processing circuit is configured to:
reconfiguring at least one of a primary and secondary serving cell and/or a secondary serving cell based on the carrier configuration information.
15. A method for radio resource management, comprising:
configuring, by a network system for providing a carrier used for communication, a User Equipment (UE) to enter a power saving mode;
receiving, by the network system, a result of a measurement of a potential carrier provided by the user equipment before transitioning from the energy-saving mode to a connected mode, the measurement being performed by the user equipment in the energy-saving mode; and
providing, by the network system, carrier configuration information determined based on the result of the measurement of the potential carrier when the user equipment enters the connected mode.
16. The method of claim 15, further comprising:
sending a message to the user equipment, the message comprising an indicator indicating a request for the result of the measurement of the potential carrier.
Technical Field
The disclosed embodiments relate generally to wireless network communications and, more particularly, to Carrier Aggregation (CA) techniques and Dual Connectivity (DC) designs in a 5G new radio wireless communication system.
Background
The background description provided herein is for the purpose of generally presenting the context of the disclosure. Work of the presently named inventors, to the extent it is described in this background section, as well as aspects of the description that may not otherwise qualify as prior art at the time of filing, are neither expressly nor impliedly admitted as prior art against the present disclosure.
Various technologies have been developed in mobile communications. For example, Carrier Aggregation (CA) techniques and Dual Connectivity (DC) techniques enable a User Equipment (UE) to be allocated with multiple component carriers, so the UE may use the multiple component carriers for data transmission and the throughput at the UE is the aggregated bandwidth of the multiple component carriers. In some examples of CA, a UE transmits and receives data on multiple component carriers from one base station at the same time. In some examples of DC, a UE transmits and receives data on multiple component carriers from two or more base stations simultaneously.
Disclosure of Invention
Aspects of the present disclosure provide methods and apparatus for radio resource control. For example, an apparatus includes a transceiver circuit and a processing circuit. The transceiver circuit is configured to transmit and receive wireless signals. The processing circuitry is configured to control the transceiver circuitry to perform measurements of potential carriers provided by a network system for communication use by the apparatus in a connected mode when the apparatus is in a power saving mode. The processing circuit then provides the results of the measurements of the potential carrier to the network system and via the transceiver circuit before the apparatus transitions from the power-saving mode to the connected mode. Further, in the connected mode, the processing circuitry receives carrier configuration information determined by the network system based on the results of the measurements of the potential carriers.
In some implementations, the processing circuit receives, via the transceiver circuit and while the apparatus is in the power saving mode, a message from the network system. The message includes an indicator indicating a request for the result of the measurement of the potential carrier. Then, in response to the request for the result of the measurement of the potential carrier, the processing circuit sends, via the transceiver circuit, a response message including the result of the measurement of the potential carrier.
In an embodiment, the processing circuit sends, via the transceiver circuit and while the apparatus is in the power saving mode, an initiation message to transition from the power saving mode to the connected mode. The initiation message includes an indicator indicating availability of the result of the measurement of the potential carrier.
In some examples, the processing circuitry is configured to turn on the transceiver circuitry to perform the measurement of the potential carrier when the apparatus is in the power saving mode; and after the measuring, opening the transceiver circuit. In an example, the processing circuit is configured to periodically turn on/off the transceiver circuit to perform the measurement of the potential carrier when the apparatus is in the power saving mode.
In an embodiment, the processing circuit receives information of the potential carrier in a release message sent from the network system to the apparatus before the apparatus enters the power saving mode. In another embodiment, the processing circuitry receives information of the potential carrier in the broadcasted and received system information when the apparatus is in the power saving mode. In another embodiment, the processing circuitry determines at least one of a duration for performing the measurement, a frequency for performing the measurement, a cell for performing the measurement, according to a predetermined measurement object.
In some embodiments, the processing circuitry reconfigures (adds) at least one of a primary secondary serving cell and/or a secondary serving cell based on the carrier configuration information.
Aspects of the present disclosure also provide a method for radio resource management by a network system (e.g., a radio access network, a base station in a radio access network, etc.). The method includes configuring, by a network system for providing a carrier used for communication, the UE to enter a power saving mode. The method then includes receiving, by the network system, a result of a measurement of a potential carrier provided by the UE prior to transitioning from the energy-saving mode to a connected mode. The measurement is performed by the UE in the power saving mode. Further, the method includes providing, by the network system, carrier configuration information determined based on the results of the measurements of the potential carrier when the UE enters the connected mode. In some embodiments, the method further comprises sending a message to the UE, and the message comprises an indicator indicating a request for the result of the measurement of the potential carrier.
Drawings
Various embodiments of the present disclosure, set forth by way of example, will be described in detail with reference to the following drawings, wherein like reference numerals represent like components, and wherein:
fig. 1 illustrates a schematic diagram of a wireless communication system, in accordance with some embodiments of the present disclosure;
figure 2 illustrates a schematic diagram of operations in a wireless communication system, in accordance with some embodiments of the present disclosure; and
fig. 3 illustrates a block diagram of a user device in accordance with some embodiments of the present disclosure.
Detailed Description
Aspects of the present disclosure provide techniques for reducing the setup time of CA and/or DC. In order to configure or reconfigure CA/DC in the UE, the network needs measurement reports from the UE. In general, the UE may perform measurements in connected mode and send measurement reports to the network upon request. In some examples, to conserve power, the UE may enter a power-saving mode in which user data is not exchanged with the network. To resume data transmission, the UE transitions from the power-saving mode to the connected mode. Performing measurements in connected mode may take time and delay the establishment of CA/DC at the mode transition from power saving mode to connected mode. Aspects of the present disclosure provide techniques for providing early measurement reports to the network before the UE resumes connected mode, so the network may configure CA/DC for the UE when the UE resumes connected mode with reduced latency and without waiting for the UE to perform measurements in connected mode.
Fig. 1 illustrates a schematic diagram of a
In the example of fig. 1, the
In another example,
In another example,
The
According to one aspect of the present disclosure, CA and/or dual Connectivity (CA) is used in the
In another scenario, UE150 aggregates a first carrier with center frequency f1 and a second carrier with second frequency f2, while
In some examples, a cell may relate to an area served by a carrier and may relate to a carrier serving the area. The carriers may be characterized as frequency bands and center frequencies. When CA/DC is used, a UE (e.g., UE 150) may be served by multiple serving cells and may transmit or receive data simultaneously on multiple serving cells, one for each component carrier. The coverage of the serving cell may vary. In the case of DC, cells are divided into two groups, i.e., a master cell group and a secondary cell group. A Primary Cell in the Primary Cell group is referred to as a Primary Cell (PCell), while a Primary Cell in the Secondary Cell group is referred to as a Primary Secondary Cell (PSCell), and other serving cells are referred to as Secondary serving cells (scells).
According to some aspects of the disclosure,
Typically, the UE150 performs measurements in connected mode. In some examples, in connected mode, UE150 exchanges user-plane data with
In the power-saving mode, the UE150 periodically turns on the transceiver circuitry for various purposes. For example, the UE150 periodically turns on the transceiver circuitry to monitor for paging signals. When the paging signal indicates pending (pending) downlink traffic to the UE150, the UE150 may revert back to connected mode to receive the downlink traffic. In an example, when the paging signal indicates no downlink traffic and the UE150 has no uplink traffic, the UE150 turns off the transceiver circuitry until the next paging interval.
Further, in the example of fig. 1, in the power-saving mode, the UE150 periodically (e.g., according to a measurement interval) turns on transceiver circuitry to perform measurements on certain frequencies. In an example, the UE150 may store the measurements and disconnect the transceiver circuitry. These measurements may be provided later in a measurement report.
Note that in an example, when the measurement interval is set to an integer multiple of the paging interval, the UE150 may perform the measurement when the transceiver circuitry is turned on for the purpose of monitoring the paging signal.
Further, according to some aspects of the present disclosure, UE150 is configured to provide measurement reports to
According to an aspect of the present disclosure, the UE150 transitions from the connected mode to the energy saving mode according to an RRC connection suspend procedure and transitions from the energy saving mode to the connected mode according to an RRC connection resume procedure. During the RRC connection suspension procedure and the RRC connection recovery procedure, some control messages are exchanged using a control channel (control plane).
In some embodiments, the access network 130 (e.g., the current primary serving cell) may start an RRC connection suspension procedure. In an example, the
Both the UE150 and the access network 130 (e.g., base station 131) store an RRC context and an association Identifier (ID), which may be referred to as a recovery ID. For example, the RRC context includes bearer configuration and security related parameters. In some examples, the RRC connection release message includes a recovery ID and security-related parameters. In response to the RRC connection release message, the UE150 stores the RRC context and the recovery ID and enters the power saving mode. In some examples, the
In the power-saving mode, when the paging signal is not available, the UE150 turns off the transceiver circuitry, and the UE150 periodically turns on the transceiver circuitry at a paging interval and monitors the paging signal (carrying the paging message) to check pending downlink traffic. If the paging message indicates that downlink traffic or there is uplink traffic to send, the UE150 performs an RRC connection recovery procedure.
In an example, to begin an RRC connection recovery procedure, UE150 may send an RRC connection recovery request message to access
According to an aspect of the disclosure, UE150 may include the measurement report in one of the control messages (e.g., an RRC connection recovery complete message sent to access
In some embodiments, UE150 includes the measurement report in one of the control messages in response to the measurement request from
In some embodiments, the UE150 may use one of the control messages to inform whether a measurement report is available. In an example, the UE150 is configured to include an indicator in the RRC connection resume request message. The indicator indicates whether a measurement report is available at the
According to some aspects of the disclosure, the UE150 may be informed via various techniques of the frequency or cell to be measured in the energy saving mode. In an embodiment, the frequencies and cells to be measured are determined according to the measurement object. In some examples, the measurement object is predetermined. The
In another example, the
Fig. 2 shows a schematic diagram of an operational flow in a wireless communication system (e.g., wireless communication system 100) according to an embodiment of the present disclosure. The flow starts at S205.
At S205, an RRC suspend message is sent from the
The RRC context includes RRC connection information, for example, parameters related to radio bearers, radio resources, temporary cell identifiers, current configuration of security parameters or keys, MAC configuration, physical layer configuration, and measurement and reporting configuration. In an example, the RRC connection suspend message includes a resume ID associated with an RRC context stored in
In some examples, the RRC connection suspend message also includes measurement information (e.g., a measurement interval, a frequency or cell to be measured, etc.). In the example, the RRC connection suspend message is sent as a type of RRC connection release message. For example, the
At S210, the UE150 enters a power saving mode (e.g., an inactive state). In the power-saving mode, the UE150 does not exchange user-plane data with the
At S220, in a power saving mode (e.g., inactive state), the UE150 periodically turns on the transceiver circuitry according to a measurement interval to perform measurements at certain frequencies, and then the UE150 may store the measurements and turn off the transceiver circuitry. In an embodiment, the frequencies and cells to be measured are configured in a predetermined measurement object. In another embodiment, the frequencies and cells to be measured are configured according to an RRC connection suspend message. In another embodiment, the frequencies and cells to be measured are configured based on system information broadcast by the current serving cell and received by the
In a power-saving mode (e.g., inactive state), the UE150 also periodically turns on transceiver circuitry to monitor for paging signals. The paging signal may carry an indicator of pending downlink traffic for
At S230, when the UE150 receives a paging signal indicating pending downlink traffic or the UE150 has uplink traffic, the UE150 may transmit an RRC connection restoration request message to the
At S240, the
At S250, in response to the RRC connection resume message, the UE150 enters a connected mode. In an example, the UE150 keeps the transceiver circuitry on.
At S260, the UE150 extracts an indicator associated with the measurement from the RRC connection resume message. When the indicator in the RRC connection resume message indicates the request including the measurement result, the UE150 includes the measurement result in an RRC connection resume complete message and transmits the RRC connection resume complete message to the
At S270, the
At S280, the UE150 receives the RRC reconfiguration message and updates CA/DC configuration information according to the RRC reconfiguration message. Then, the UE150 transmits and receives user data according to the updated RRC configuration information. UE150 may send an RRC reconfiguration complete message to
Fig. 3 shows a block diagram of a UE 300 according to an embodiment of the present disclosure. In an example, the UE150 may be configured in the same manner as the UE 300. The UE 300 may be configured to perform various functions in accordance with one or more embodiments or examples described herein. Accordingly, the UE 300 may provide means for implementing the techniques, procedures, functions, components, systems described herein. For example, the UE 300 may be used to implement the functionality of any of the
In various examples, the processing circuitry 310 may include circuitry configured to perform the functions and procedures described herein, with or without software. In various examples, the processing circuit may be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a digital enhancement circuit, or the like, or a combination thereof.
In some other examples, processing circuit 310 may be a Central Processing Unit (CPU) configured to execute program instructions to perform the various functions and flows described herein. Thus, the memory 320 may be configured to store program instructions. When executing program instructions, processing circuitry 310 may perform functions and procedures. Memory 320 may also store other programs or data (e.g., an operating system, application programs, etc.). The memory may include transitory or non-transitory storage media. The memory 320 may include Read Only Memory (ROM), Random Access Memory (RAM), flash memory, solid state memory, a hard disk drive, an optical disk drive, and so forth. The processing circuit 310 may perform various functions such as turning on/off power to another circuit, controlling the RF module 330 to measure frequencies or cells, extracting indicators from messages, including indicators or measurement results in messages, etc.
The RF module 330 receives processed data signals from the processing circuit 310 and transmits signals in a beamformed wireless communication network via the antenna 340, and vice versa. The RF module 330 may include transmit circuitry and receive circuitry (or transceiver circuitry) that may transmit signals carrying outgoing messages or receive signals carrying incoming messages. The RF module 330 may include a digital-to-analog converter (DAC), an analog-to-digital converter (ADC), an up-converter, a down-converter, a filter, and an amplifier for receiving and transmitting operations. The RF module 330 may include a multi-antenna circuit (e.g., an analog signal phase/amplitude control unit) for beamforming operation. The antenna 340 may include one or more antenna arrays. The RF module 330 may also include circuitry that may perform measurements on frequencies or cells.
The UE 300 may optionally include other components such as input and output devices, additional or signal processing circuitry, and the like. Accordingly, the UE 300 is capable of performing other additional functions (e.g., executing applications) as well as handling alternative communication protocols.
The procedures and functions described herein may be implemented as a computer program that, when executed by one or more processors, may cause the one or more processors to perform the respective procedures and functions. A computer program may be stored or distributed on a suitable medium, such as an optical storage medium or a solid-state medium supplied together with or as part of other hardware. The computer program may also be distributed in other forms, such as via the internet or other wired or wireless telecommunication systems. For example, the computer program may be obtained and loaded into an apparatus, including through a physical medium or distributed system, including from a server connected to the internet.
The computer program can be accessed from a computer-readable medium that provides program instructions for use by or in connection with a computer or any instruction execution system. A computer readable medium may include any means that can store, communicate, propagate, or transport a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable medium can be a magnetic, optical, electronic, electromagnetic, infrared, or semiconductor system (or apparatus or device) or a propagation medium. The computer-readable medium may include a computer-readable non-transitory storage medium, such as a semiconductor or solid state memory, magnetic tape, a removable computer diskette, a RAM, a ROM, a magnetic disk, an optical disk, and the like. The computer-readable non-transitory storage medium may include all types of computer-readable media, including magnetic storage media, optical storage media, flash memory media, and solid state storage media.
When implemented in hardware, the hardware may comprise one or more of a discrete component, an integrated circuit, an ASIC, or the like.
While aspects of the present disclosure have been described in conjunction with specific embodiments thereof, which are set forth by way of example, alternatives, modifications, and variations may be made to the examples. Accordingly, the embodiments set forth herein are intended to be illustrative, not limiting. Changes may be made without departing from the scope of the claims set forth below.
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