User terminal and wireless communication method
阅读说明:本技术 用户终端以及无线通信方法 (User terminal and wireless communication method ) 是由 武田一树 永田聪 陈晓航 赵群 侯晓林 蒋惠玲 于 2017-03-23 设计创作,主要内容包括:为了在应用使用反复发送的冲突型UL发送的情况下恰当地进行通信,在本发明的用户终端的一方式中,特征在于,具有:以无来自无线基站的UL发送指示的方式发送UL数据的发送单元;以及使用传输块(TB)对所述UL数据的反复发送进行控制的控制单元,所述控制单元在使用多个TB发送所述UL数据的情况下,对各TB至少进行时分复用、频分复用或者码分复用。(In order to appropriately perform communication when collision-type UL transmission using repeated transmission is applied, one aspect of a user terminal according to the present invention includes: a transmitting unit configured to transmit UL data so that there is no UL transmission instruction from the radio base station; and a control unit that controls repeated transmission of the UL data using Transport Blocks (TBs), wherein the control unit performs at least time division multiplexing, frequency division multiplexing, or code division multiplexing on each TB when the UL data is transmitted using a plurality of TBs.)
1. A user terminal, comprising:
a transmission unit configured to transmit UL data so that there is no UL transmission instruction from the radio base station; and
a control unit which controls repeated transmission of the UL data using a Transport Block (TB),
the control unit performs at least time division multiplexing, frequency division multiplexing, or code division multiplexing on each TB when the UL data is transmitted using a plurality of TBs.
2. The user terminal of claim 1,
the control unit retains the repeated transmission of the TB corresponding to the UL data, and resumes the repeated transmission of the TB corresponding to the UL data that has been transmitted after the transmission of the TB corresponding to the initial transmission of new UL data.
3. The user terminal of claim 1,
the control unit notifies a scheduling request for new data.
4. The user terminal according to any one of claim 1 to claim 3, further having:
and a reception unit configured to receive at least one of information on the number of TBs used for transmission of the UL data, information on a configuration of repeated transmission of the TBs, and information on the set TB.
5. The user terminal of any of claims 1 to 4,
the transmission unit transmits information for identifying each TB during transmission of each TB.
6. A wireless communication method for a user terminal, comprising:
a step of transmitting UL data so that there is no UL transmission instruction from the radio base station; and
a step of controlling repeated transmission of the UL data using a Transport Block (TB),
when the UL data is transmitted using a plurality of TBs, each TB is at least time-division multiplexed, frequency-division multiplexed, or code-division multiplexed.
Technical Field
The present invention relates to a user terminal and a wireless communication method in a next generation mobile communication system.
Background
In a UMTS (Universal Mobile Telecommunications System) network, Long Term Evolution (LTE) is standardized for the purpose of higher data rate, lower latency, and the like (non-patent document 1). Further, for the purpose of further increasing the bandwidth and speed of LTE, systems following LTE (for example, also referred to as LTE-a (LTE-Advanced), FRA (Future Radio Access), 4G, 5G + (plus), nr (new rat), LTE rel.14, 15, and the like) have been studied.
In a conventional LTE system (e.g., LTE rel.8-13), a Downlink (DL: Downlink) and/or an Uplink (UL: Uplink) are communicated using a subframe of 1ms (also referred to as a Transmission Time Interval (TTI)) or the like. This subframe is a transmission time unit of 1 data packet after channel coding, and is a processing unit of scheduling, link adaptation, retransmission control (Hybrid Automatic repeat request (HARQ)), and the like.
The radio base station controls allocation (scheduling) of data to the user terminal, and notifies the user terminal of the scheduling of data using Downlink Control Information (DCI). The user terminal controls reception of DL data and transmission of uplink data based on the downlink control information. For example, in the conventional LTE system, when receiving downlink control information (e.g., UL grant) instructing UL transmission, the user terminal transmits uplink data in a predetermined subframe after a predetermined period (e.g., after 4 ms).
Disclosure of Invention
Problems to be solved by the invention
In future wireless communication systems (e.g., LTE rel.14, 15 to 5G, NR), it is assumed that scheduling of data is controlled in a configuration different from that of the conventional LTE system (e.g., LTE rel.13 ago). For example, in order to provide a communication service that seeks low delay and high reliability (e.g., URLLC (Ultra Reliable and low delay Communications)), reduction of communication delay (Latency reduction) has been studied.
Specifically, in order to shorten the delay time until the start of transmission of UL data, it is considered to allow a plurality of user terminals to perform communication by collision of UL transmissions. For example, the user terminal transmits UL data without a UL grant from the radio base station (also referred to as UL grant-free UL transmission, UL grant-less UL transmission, collision-type UL transmission (Contention-based UL transmission), no UL grant, collision-type UL transmission, and the like).
However, it has not been determined how to control the user terminal to perform UL data transmission by applying collision-type UL transmission, and it is difficult to apply a method of the conventional LTE system on the premise of UL transmission by UL grant. In addition, in the collision-type UL transmission, although it is studied to apply the repetitive transmission, how to control the repetitive transmission becomes a problem.
The present invention has been made in view of the above, and it is an object of the present invention to provide a user terminal and a radio communication method capable of performing communication appropriately when collision-type UL transmission using repeated transmission is applied.
Means for solving the problems
A user terminal according to an aspect of the present invention includes: the wireless base station includes a transmission unit configured to transmit UL data so that there is no UL transmission instruction from the wireless base station, and a control unit configured to control repeated transmission of the UL data using Transport Blocks (TBs), wherein the control unit is configured to perform at least time division multiplexing, frequency division multiplexing, or code division multiplexing on each TB when the UL data is transmitted using a plurality of TBs.
Effects of the invention
According to the present invention, communication can be appropriately performed when collision-type UL transmission using repeated transmission is applied.
Drawings
Fig. 1A is a diagram for explaining transmission based on UL grant, and fig. 1B is a diagram for explaining transmission of UL grant exemption.
Fig. 2 is a diagram showing an example of UL data transmission using a plurality of TBs. Fig. 2A is a diagram illustrating a transmission method, and fig. 2B is a diagram illustrating a packet.
Fig. 3 is a diagram showing an example in which new data is generated in the UL-exempt grant transmission. Fig. 3A is a diagram illustrating a transmission method, and fig. 3B is a diagram illustrating a packet.
Fig. 4 is a diagram illustrating an example of the UL data transmission method according to the first aspect of the present invention. Fig. 4A is a diagram illustrating packets stored in a UE buffer, and fig. 4B is a diagram illustrating a transmission method according to a first embodiment.
Fig. 5 is a diagram illustrating an example of a UL data transmission method according to a second embodiment of the present invention.
Fig. 6 is a diagram illustrating an example of the UL data transmission method according to the first option of the third embodiment of the present invention.
Fig. 7 is a diagram for explaining a problem in the case of performing repeated transmission using a plurality of TBs.
Fig. 8 is a diagram illustrating an example of association between TB and RS information.
Fig. 9 is a diagram showing another example of association between TB and RS information.
Fig. 10 is a diagram for explaining an example of a notification method in the fifth embodiment of the present invention.
Fig. 11 is a diagram showing a relationship between the signaling of the above information and the transmission of the URLLC packet.
Fig. 12 is a diagram showing a relationship between the signaling of the above information and the transmission of URLLC packets.
Fig. 13 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment of the present invention.
Fig. 14 is a diagram showing an example of the overall configuration of a radio base station according to an embodiment of the present invention.
Fig. 15 is a diagram showing an example of a functional configuration of a radio base station according to an embodiment of the present invention.
Fig. 16 is a diagram showing an example of the overall configuration of a user terminal according to an embodiment of the present invention.
Fig. 17 is a diagram showing an example of a functional configuration of a user terminal according to an embodiment of the present invention.
Fig. 18 is a diagram showing an example of hardware configurations of a radio base station and a user terminal according to an embodiment of the present invention.
Detailed Description
In future wireless Communication systems, various services are desired such as high-speed and large-capacity Communication (enhanced Mobile broadband (eMBB)), massive connection (MTC) of devices (user terminals) for Machine-to-Machine Communication (M2M: Machine-to-Machine), such as IoT (internet of Things) and MTC (Machine Type Communication), and low-latency and high-reliability Communication (URLLC: Ultra-reliable and low-latency Communication) are accommodated in a single frame (frame).
In order to meet the requirements of URLLC, it may be necessary to set the delay of U-plane to be within 0.5ms, for example, and set the information of a predetermined payload size (for example, 32 bytes) to be 10 BLER (Block Error Rate) within 0.5ms or 1ms-5Is sent with the reliability of (1).
In order to meet the requirements of URLLC, UL grant-based transmission (UL grant-based transmission) for transmitting UL data based on UL grant is insufficient, and it is necessary to apply UL grant-free transmission (UL grant-free transmission) for transmitting UL data without UL grant. Here, description is made regarding UL grant transmission and UL exempt grant transmission. Fig. 1A is a diagram for explaining transmission based on UL grant, and fig. 1B is a diagram for explaining transmission of UL grant exemption.
In the UL grant transmission, as shown in fig. 1A, the radio base station transmits a downlink control channel (UL grant) indicating allocation of UL data (PUSCH), and the User Terminal (UE) transmits UL data in accordance with the UL grant. On the other hand, in the UL grant free transmission, as shown in fig. 1B, the user terminal transmits UL data without receiving a UL grant for scheduling of data.
In addition, in the UL grant-free transmission, repeated transmission of UL data is considered. In the repeated transmission of UL data, it is assumed that a user terminal repeatedly transmits a predetermined number (K) of UL data using Transport Blocks (TBs) (in TB units). For example, the user terminal repeatedly transmits a TB corresponding to UL data until downlink control information (UL grant) instructing retransmission of UL data is transmitted or until the number of repeated transmissions reaches a predetermined number (K).
As described above, when the user terminal repeatedly transmits a predetermined number (K) of UL data, the K may include the Redundancy Version (RV) of the TB and/or the Modulation and Coding Scheme (MCS) of the TB that is transmitted repeatedly after the initial transmission, and may be the same or different values. In addition, frequency hopping may be applied to the repeated transmission.
In the UL grant transmission, when data that cannot be transmitted in one TB size is stored in the UE buffer, it is considered to perform UL data transmission using a plurality of TBs (for example,
In the repetitive transmission shown in fig. 2A, the repetitive transmission of
Here, when UL data is transmitted in each TB, an HARQ (Hybrid Automatic Repeat reQuest) process is allocated. The HARQ Process is a retransmission control processing unit, and each HARQ Process is identified by an HARQ Process Number (HPN). More than one HARQ process is set for the user terminal. In the HARQ process of the same HPN, the same data is retransmitted until receiving ACK.
When the HARQ process is applied to the UL grant-free iterative transmission, if only one HARQ process is used when data that cannot be transmitted with one TB size is stored in the UE buffer as shown in fig. 2B, a higher modulation scheme is allowed for transmitting a TB with a larger size. Accordingly, a high SINR (Signal to Interference plus Noise Ratio) is required for reception, and it is considered that the reliability of communication is lowered. On the other hand, in the case of using a plurality of HARQ processes, the radio base station (gNB) needs to determine the respective HARQ processes. Furthermore, processing delays need to be taken into account as well.
Further, it is also considered that new data (new traffic) is generated in the middle of transmission and reception of data which is being transmitted so as not to allow UL grant. Fig. 3 is a diagram showing an example in which new data is generated in the UL-exempt grant transmission. Fig. 3A is a diagram illustrating a transmission method, and fig. 3B is a diagram illustrating a packet. In fig. 3A, new data (
In the repetitive transmission shown in fig. 3A, the repetitive transmission of
Therefore, the present inventors have focused on the fact that, when applying repeated transmission to UL-exempt grant transmission, transmission delay occurs after the transmission of a subsequent TB is completed as the repeated transmission of a previous TB, and have conceived to control the transmission of each TB so that an increase in delay is suppressed. That is, in one aspect of the present invention, in order to appropriately perform communication when collision-type UL transmission using repeated transmission is applied, when UL data is transmitted without an UL transmission instruction from a radio base station, a plurality of TBs are at least time-division multiplexed, frequency-division multiplexed, or code-division multiplexed when repeated transmission is performed.
Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. The radio communication methods according to the respective embodiments may be applied individually or in combination. In the following description, a case is shown where UL data transmission is controlled using TBs (in TB units), but the present embodiment is not limited to this. For example, the same can be applied to a case where UL transmission is controlled using Code Blocks (CBs) (in CB units).
(first mode)
In this embodiment, when a packet includes a plurality of TBs, the plurality of TBs are Frequency Division Multiplexed (FDM) and/or Code Division Multiplexed (CDM).
Fig. 4 is a diagram illustrating an example of the UL data transmission method according to the first aspect of the present invention. Fig. 4A is a diagram illustrating packets accumulated in a UE buffer, and fig. 4B is a diagram illustrating a transmission method according to a first embodiment.
In this embodiment, for example, as shown in fig. 4A, data that cannot be transmitted in one TB size is stored in the UE buffer, and when UL data transmission is performed using a plurality of TBs (for example,
In this embodiment, when a plurality of TBs (for example,
In this case,
In this way, when a plurality of TBs are transmitted by applying the repetitive transmission, the plurality of TBs are frequency division multiplexed before each TB is continuously and repetitively transmitted, and thus it is possible to suppress the occurrence of delay in a specific TB.
(second mode)
In this embodiment, when a packet includes a plurality of TBs, the plurality of TBs are Time Division Multiplexed (TDM).
Fig. 5 is a diagram illustrating an example of a UL data transmission method according to a second embodiment of the present invention. In this embodiment, the time domain is divided and a plurality of TBs are allocated. The time domain information allocated to
In this embodiment, when
(third mode)
In this embodiment, there are a plurality of TBs. In this approach, there are three options. First, in the first option, the repeated transmission of the TB corresponding to UL data is retained, and after the transmission of the TB corresponding to the initial transmission of new data, the repeated transmission of the TB corresponding to UL data that has already been transmitted is resumed. In this way, in the first option, during the repeated transmission of the UL grant transmission exempt, the resource of the TB (TB #1) corresponding to UL data is left open, and the TB (TB #2) corresponding to new data is transmitted using the resource.
Fig. 6 is a diagram illustrating an example of the UL data transmission method according to the first option of the third embodiment of the present invention. As shown in fig. 6, when
The UL data transmission method according to the second option of the third aspect is a method of frequency division multiplexing or code division multiplexing a plurality of TBs. This is the same as the UL data transmission method according to the first embodiment shown in fig. 4B.
The UL data transmission method according to the third option of the third aspect is a method for notifying a scheduling request for new data. In this method, a user terminal notifies a radio base station of a scheduling request for new data through a control channel, and the radio base station transmits an UL grant for scheduling the new data to the user terminal.
(fourth mode)
As shown in fig. 7, when a user terminal (UE) transmits a plurality of TBs (
In this embodiment, in order to solve the above problem, information for identifying each TB is transmitted from the user terminal to the radio base station during transmission of each TB. The information for identifying each TB includes Reference Signal (Reference Signal) information, for example, RS sequence, RS index, RS pattern, RSID, and the like. For example, as shown in fig. 8,
Further, as shown in fig. 9, information related to the allocation of TB and RS information may be transmitted from the user terminal to the radio base station by a UL control signal in the UL grant free transmission. The UL control signal may also include information on HARQ processes and indexes. In the repeated transmission without the UL grant transmission, the UL control signal may be transmitted only in the first transmission of each TB and not in the subsequent transmission.
In this embodiment, the HARQ process is associated with RS information (for example, RS sequence or RS code), a scrambling pattern, or UE identification information in advance, and the radio base station can identify which TB is transmitted and which HARQ process is by detecting the RS information, the scrambling pattern, or the UE identification information.
(fifth mode)
In this embodiment, the user terminal receives at least one of information on the number of TBs used for transmission of UL data, information on the configuration of the repeated transmission of TBs, and information on the set TB. These pieces of information are set for each TB (
Fig. 11 and 12 are diagrams showing a relationship between the signaling of the information and the transmission of the URLLC packet. Fig. 11 shows a case where the above-described information is semi-statically signaled, and fig. 12 shows a case where the above-described information DL is dynamically signaled.
As shown in fig. 11, the radio base station (gNB) transmits configuration information (setting information) for transmission of a plurality of TBs to the user terminal (UE) semi-statically by RRC signaling, for example. After receiving the configuration information (setting information), the user terminal performs UL-exempt grant transmission to the radio base station. In this case, signaling overhead can be reduced.
As shown in fig. 12, the radio base station (gNB) performs DL signaling including a new TB transmission instruction to the user terminal (UE). The new TB transmission instruction includes, for example, repetition of transmission of
(Wireless communication System)
Hereinafter, a configuration of a radio communication system according to an embodiment of the present invention will be described. In this radio communication system, communication is performed using one of the radio communication methods according to the above-described embodiments of the present invention or a combination thereof.
Fig. 13 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment of the present invention. In the
In the
The
The
The
The
The
The
The
Each
In the
OFDMA is a multicarrier transmission scheme in which a frequency band is divided into a plurality of narrow frequency bands (subcarriers) and data is mapped to each subcarrier to perform communication. SC-FDMA is a single-carrier transmission scheme in which a system bandwidth is divided into bands each composed of one or consecutive resource blocks for each terminal, and a plurality of terminals use different bands to reduce interference between terminals. The uplink and downlink radio access schemes are not limited to the combination thereof, and other radio access schemes may be used.
In the
In the
The Downlink L1/L2 Control Channel includes PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control format indicator Channel), PHICH (Physical Hybrid-ARQ indicator Channel), and the like. Downlink Control Information (DCI) including scheduling Information of the PDSCH and the PUSCH and the like are transmitted through the PDCCH. The number of OFDM symbols for PDCCH is transmitted through PCFICH. Transmission acknowledgement information (for example, also referred to as retransmission control information, HARQ-ACK, ACK/NACK, and the like) of HARQ (Hybrid Automatic repeat request) for PUSCH is transmitted by PHICH. EPDCCH and PDSCH (downlink shared data channel) are frequency division multiplexed, and used for transmission of DCI and the like in the same manner as PDCCH.
In the
In the
(radio base station)
Fig. 14 is a diagram showing an example of the overall configuration of a radio base station according to an embodiment of the present invention. The
User data transmitted from the
In baseband
Transmission/
On the other hand, regarding the uplink signal, the radio frequency signal received by the transmission/
The baseband
The
Fig. 15 is a diagram showing an example of a functional configuration of a radio base station according to an embodiment of the present invention. In this example, the functional blocks mainly representing the characteristic parts in the present embodiment are shown, and the
The baseband
The control unit (scheduler) 301 performs overall control of the
The
Transmission
Transmission
Received
The received
The
For example,
(user terminal)
Fig. 16 is a diagram showing an example of the overall configuration of a user terminal according to an embodiment of the present invention. The
The radio frequency signal received by the transmission and
Baseband
On the other hand, uplink user data is input from the
Further, transmission/
Fig. 17 is a diagram showing an example of a functional configuration of a user terminal according to an embodiment of the present invention. In this example, the functional blocks mainly showing the characteristic parts in the present embodiment are assumed to be provided that the
The baseband
The
Further,
Further, when there are a plurality of TBs,
Further, the
Transmission
Transmission
Received
The received
The
(hardware construction)
In addition, the block diagrams used for the description of the above embodiments show blocks in functional units. These functional blocks (structural units) are implemented by any combination of hardware and/or software. Note that the means for implementing each functional block is not particularly limited. That is, each functional block may be implemented by one apparatus which is physically and/or logically combined, and two or more apparatuses which are physically and/or logically separated may be directly and/or indirectly (for example, by wire and/or wireless) connected and implemented by the plurality of apparatuses.
For example, a radio base station, a user terminal, and the like in one embodiment of the present invention function as a computer that performs processing of the radio communication method of the present invention. Fig. 18 is a diagram showing an example of hardware configurations of a radio base station and a user terminal according to an embodiment of the present invention. The
In the following description, a language "device" can be interpreted as a circuit, an apparatus, a unit, or the like. The hardware configuration of the
For example, only one
Each function in the
The
The
The
The
The
The
Further, the
The
(modification example)
In addition, terms described in the present specification and/or terms necessary for understanding the present specification may be replaced with terms having the same or similar meanings. For example, a channel and/or symbol may also be a signal (signaling). Further, the signal may also be a message. The reference signal may be also referred to as rs (reference signal) or may be referred to as Pilot (Pilot), Pilot signal, or the like according to the applied standard. In addition, a Component Carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, and the like.
The radio frame may be configured of one or more periods (frames) in the time domain. The one or more periods (frames) constituting the radio frame may also be referred to as subframes. Further, the subframe may be configured by one or more slots in the time domain. The sub-frame may also be a fixed length of time (e.g., 1ms) independent of the parameter set.
Further, the slot may be configured by one or more symbols in the time domain (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, or the like). Further, the time slot may also be a time unit based on a parameter set. Further, a slot may also include a plurality of mini slots (mini slots). Each mini-slot may also be made up of one or more symbols in the time domain. Further, a mini-slot may also be referred to as a subslot.
The radio frame, subframe, slot, mini-slot, and symbol all represent a unit of time when a signal is transmitted. The radio frame, subframe, slot, mini-slot, and symbol may also use other designations corresponding to each. For example, 1 subframe may be referred to as a Transmission Time Interval (TTI), a plurality of consecutive subframes may be referred to as TTIs, and 1 slot or 1 mini-slot may be referred to as a TTI. That is, the subframe and/or TTI may be a subframe (1ms) in the conventional LTE, may be a period shorter than 1ms (for example, 1 to 13 symbols), or may be a period longer than 1 ms. The unit indicating TTI may be referred to as a slot, a mini slot, or the like instead of a subframe.
Here, the TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in the LTE system, the radio base station performs scheduling for allocating radio resources (frequency bandwidth, transmission power, and the like that can be used by each user terminal) to each user terminal in TTI units. In addition, the definition of TTI is not limited thereto.
The TTI may be a transmission time unit of a channel-coded data packet (transport block), code block, and/or code word, or may be a processing unit such as scheduling or link adaptation. In addition, given a TTI, the time interval (e.g., number of symbols) to which the transport block, code block, and/or codeword are actually mapped may also be shorter than the TTI.
In addition, when 1 slot or 1 mini-slot is referred to as TTI, TTI of 1 or more (i.e., slot of 1 or more or mini-slot of 1 or more) may be the minimum time unit for scheduling. The number of slots (the number of mini-slots) constituting the minimum time unit of the schedule may be controlled.
The TTI having a time length of 1ms may also be referred to as a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a long subframe, or the like. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, or the like.
In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length smaller than the long TTI and equal to or longer than 1 ms.
A Resource Block (RB) is a Resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous sub carriers (subcarriers) in the frequency domain. The RB may include one or more symbols in the time domain, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. The 1TTI and 1 subframe may be formed of one or more resource blocks. In addition, one or more RBs may also be referred to as Physical Resource Blocks (PRBs), Sub-Carrier groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB peers, and so on.
In addition, a Resource block may also be composed of one or more Resource Elements (REs). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
The above-described structures of radio frames, subframes, slots, mini slots, symbols, and the like are merely examples. For example, the number of subframes included in the radio frame, the number of slots per subframe or radio frame, the number of mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the Cyclic Prefix (CP) length, and other configurations may be variously changed.
The information, parameters, and the like described in the present specification may be expressed as absolute values, relative values to predetermined values, or other corresponding information. For example, the radio resource may be indicated by a predetermined index. Further, the equations and the like using these parameters may be different from those explicitly disclosed in the present specification.
The names used in this specification for parameters and the like are not limitative in any way. For example, various channels (PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), and the like) and information elements can be identified by all suitable names, and thus various names assigned to these various channels and information elements are not limited in any point.
Information, signals, and the like described in this specification can also be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, and the like that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.
Information, signals, and the like can be output from a higher layer (upper layer) to a lower layer (lower layer) and/or from a lower layer to a higher layer. Information, signals, and the like may also be input and output via a plurality of network nodes.
The information, signals, and the like that are input/output may be stored in a specific place (for example, a memory) or may be managed by a management table. The information, signals, and the like to be input and output can be overwritten, updated, or written. The information, signals, etc. that are output may also be deleted. The input information, signal, and the like may be transmitted to another device.
The information notification is not limited to the embodiment described in the present specification, and may be performed by other methods. For example, the Information may be notified by physical layer signaling (e.g., Downlink Control Information (DCI)), Uplink Control Information (UCI), higher layer signaling (e.g., RRC (Radio resource Control) signaling), broadcast Information (Master Information Block, SIB (System Information Block, etc.), MAC (Medium Access Control) signaling), other signals, or a combination thereof.
In addition, physical Layer signaling may also be referred to as L1/L2 (Layer) 1/Layer 2) control information (L1/L2 control signals), L1 control information (L1 control signals), and the like. The RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like. The MAC signaling may be notified by a MAC Control Element (MAC CE (Control Element)), for example.
Note that the notification of the predetermined information (for example, the notification of "X") is not limited to be explicitly performed, and may be implicitly performed (for example, by not performing the notification of the predetermined information or by performing the notification of other information).
The determination may be performed by a value (0 or 1) expressed by 1 bit, by a true or false value (boolean value) expressed by true (true) or false (false), or by a comparison of numerical values (for example, a comparison with a predetermined value).
Software shall be construed broadly to mean instructions, instruction sets, code segments, program code, programs, subroutines, software modules, applications, software packages, routines, subroutines, object (objects), executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names.
In addition, software, instructions, information, and the like may also be transmitted or received via a transmission medium. For example, where software is transmitted from a website, server, or other remote source using wired and/or wireless techniques (e.g., coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless techniques (infrared, microwave, etc.), such wired and/or wireless techniques are included within the definition of transmission medium.
The terms "system" and "network" as used in this specification are used interchangeably.
In the present specification, terms such as "Base Station (BS)", "radio Base Station", "eNB", "gNB", "cell", "sector", "cell group", "carrier", and "component carrier" can be used interchangeably. A base station is sometimes referred to as a fixed station (fixed station), NodeB, eNodeB (eNB), access point (access point), transmission point, reception point, femto cell, small cell, etc.
A base station can accommodate one or more (e.g., three) cells (also referred to as sectors). In the case where a base station accommodates multiple cells, the coverage area of the base station as a whole can be divided into multiple smaller areas, and each smaller area can also provide communication service through a base station subsystem (e.g., a small indoor base station (RRH) Remote Radio Head) — the term "cell" or "sector" refers to a part or the whole of the coverage area of the base station and/or the base station subsystem that performs communication service in the coverage area.
In this specification, terms such as "Mobile Station (MS)", "User terminal (User terminal)", "User Equipment (UE)", and "terminal" can be used interchangeably. A base station may also be referred to by terms such as fixed station (fixed station), NodeB, eNodeB (eNB), access point (access point), transmission point, reception point, femto cell, small cell, and the like.
A mobile station is sometimes referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless communications device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, or several other appropriate terms.
The radio base station in this specification may be interpreted as a user terminal. For example, the respective aspects/embodiments of the present invention can be applied to a configuration in which communication between a radio base station and a user terminal is replaced with communication between a plurality of user terminals (Device-to-Device (D2D)). In this case, the
Similarly, the user terminal in this specification can be interpreted as a radio base station. In this case, the
In this specification, it is assumed that a specific operation performed by a base station is sometimes performed by its upper node (upper node) depending on the situation. In a network configured by one or more network nodes (network nodes) having a base station, it is apparent that various operations performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (for example, consider MME (Mobility Management Entity), S-GW (Serving-Gateway), and the like, but not limited thereto), or a combination thereof.
The respective modes and embodiments described in the present specification may be used alone, may be used in combination, or may be switched to use with execution. Note that, the order of the processing procedures, sequences, flowcharts, and the like of the respective modes and embodiments described in the present specification may be changed as long as there is no contradiction. For example, elements of various steps are presented in an exemplary order in the method described in the present specification, and the method is not limited to the specific order presented.
The aspects/embodiments described in this specification may also be applied to LTE (Long Term Evolution), LTE-a (LTE-Advanced), LTE-B (LTE-Beyond), SUPER3G, IMT-Advanced, 4G (fourth generation Mobile communication System), 5G (fifth generation Mobile communication System), FRA (future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New Radio Access), FX (future Radio Access), GSM (Global System for Mobile communication), Radio Broadband (Radio Access 802, Radio over Broadband), and GSM (Global System for Mobile communication), CDMA (wireless telecommunications System), Radio over Broadband (Radio over Broadband), CDMA (Radio over cellular) 11 (Radio over cellular) IEEE 802.16(WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), a system using other appropriate wireless communication method, and/or a next generation system expanded based thereon.
The term "based on" used in the present specification does not mean "based only on" unless otherwise noted. In other words, the expression "based on" means both "based only on" and "based at least on".
Any reference to an element using the designations "first", "second", etc. used in this specification is not intended to limit the amount or order of such elements generally. These designations can be used herein as a convenient means of distinguishing between two or more elements. Thus, reference to first and second elements does not imply that only two elements can be used or that in some form the first element must precede the second element.
The term "determining" used in the present specification sometimes includes various operations. For example, the "determination" may be a calculation (calculating), a processing (processing), a derivation (deriving), an investigation (investigating), a search (logging) (for example, a search in a table, a database, or another data structure), a confirmation (intercepting), or the like. In addition, the "determination (decision)" may be a reception (e.g., reception information), a transmission (e.g., transmission information), an input (input), an output (output), an access (e.g., data accessed to a memory), or the like. In addition, as the "judgment (decision)", solution (solving), selection (selecting), selection (smoothening), establishment (establishing), comparison (comparing), and the like may be regarded as the "judgment (decision)". That is, as for "judgment (decision)", some operations may be regarded as "judgment (decision)".
The terms "connected", "coupled" and "coupled" or any variation thereof used in the present specification mean all direct or indirect connections or couplings between 2 or more elements, and can include an intermediate element of 1 or more between two elements that are "connected" or "coupled" to each other. The combination or connection between the elements may be physical, logical, or a combination thereof. For example, "connected" may also be interpreted as "accessed". As used herein, two elements may be considered to be "connected" or "coupled" to each other by using 1 or more electrical wires, cables, and/or printed electrical connections, and by using electromagnetic energy having a wavelength in the radio frequency domain, the microwave domain, and/or the optical (both visible and invisible) domain, as a few non-limiting and non-inclusive examples.
When the terms "including", "including" and "comprising" and variations thereof are used in the specification or the claims, these terms are intended to be inclusive in the same way as the term "comprising". Further, the term "or" as used in the specification or claims means not exclusive or.
While the present invention has been described in detail, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented as modifications and variations without departing from the spirit and scope of the present invention defined by the claims. Therefore, the description of the present specification is for illustrative purposes, and the present invention is not limited thereto.
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