WO2024202053A1 - 端末 - Google Patents
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- WO2024202053A1 WO2024202053A1 PCT/JP2023/013683 JP2023013683W WO2024202053A1 WO 2024202053 A1 WO2024202053 A1 WO 2024202053A1 JP 2023013683 W JP2023013683 W JP 2023013683W WO 2024202053 A1 WO2024202053 A1 WO 2024202053A1
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- terminal
- random access
- base station
- unit
- access procedure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
- H04W8/24—Transfer of terminal data
Definitions
- This disclosure relates to a terminal that enables appropriate scheduling to be performed depending on the number of receiving antennas.
- the 3rd Generation Partnership Project (3GPP) is developing specifications for the 5th generation mobile communication system (5G, also known as New Radio (NR) or Next Generation (NG)) and is also developing specifications for the next generation of mobile communication systems, known as Beyond 5G, 5G Evolution or 6G.
- 5G also known as New Radio (NR) or Next Generation (NG)
- NG Next Generation
- XR extended reality
- wearable devices have limited space for mounting antennas for receiving wireless signals. Therefore, while conventional UEs are equipped with four receiving antennas (4RX), it is being considered to mount wearable devices with fewer than four receiving antennas, for example, two receiving antennas (2RX).
- 4RX UE a terminal with four receiving antennas
- 2RX UE a terminal with fewer than four receiving antennas
- the number of receiving antennas in a 2RX UE is not limited to two, but may be one or three.
- 2RX UEs are not limited to wearable devices.
- a 2RX UE has a smaller number of antennas than a 4RX UE, which means that its reception sensitivity is reduced. For this reason, base stations (gNodeB, gNB) need to perform different scheduling for 2RX UE than for 4RX UE in terms of modulation coding scheme (MCS) and other aspects.
- MCS modulation coding scheme
- the gNB cannot identify whether the UE is a 2RX UE or not. As a result, there is a risk that inappropriate scheduling will be performed for the 2RX UE even after the random access procedure is completed.
- the present disclosure has been made in light of these circumstances, and aims to provide a terminal that can cause a base station to perform scheduling for 2RX UE.
- One aspect of the disclosure is a terminal that includes a control unit (RA unit 230) that executes a random access procedure with a base station, and a transmission unit (transmission/reception unit 210) that transmits a message indicating that the terminal has a smaller number of receiving antennas than other terminals during the random access procedure, and the message is transmitted in a dedicated resource for the terminal when starting the random access procedure.
- RA unit 230 control unit
- transmission/reception unit 210 transmission/reception unit 210 that transmits a message indicating that the terminal has a smaller number of receiving antennas than other terminals during the random access procedure, and the message is transmitted in a dedicated resource for the terminal when starting the random access procedure.
- One aspect of the disclosure is a terminal that includes a control unit (RA unit 230) that executes a random access procedure with a base station, and a transmission unit (transmission/reception unit 210) that transmits a message indicating that the terminal has a smaller number of receiving antennas than other terminals during the random access procedure, the message including a code point indicating that the terminal is the terminal.
- RA unit 230 control unit
- transmission/reception unit 210 transmission/reception unit 210 that transmits a message indicating that the terminal has a smaller number of receiving antennas than other terminals during the random access procedure, the message including a code point indicating that the terminal is the terminal.
- One aspect of the disclosure is a terminal that includes a control unit (RA unit 230) that executes a random access procedure with a base station, and a transmission unit (transmission/reception unit 210) that transmits a message indicating that the terminal has a smaller number of receiving antennas than other terminals in the random access procedure, and the message indicates the completion of the random access procedure.
- RA unit 230 control unit
- transmission/reception unit 210 transmission/reception unit 210) that transmits a message indicating that the terminal has a smaller number of receiving antennas than other terminals in the random access procedure, and the message indicates the completion of the random access procedure.
- FIG. 1 is a diagram showing the overall configuration of a wireless communication system.
- FIG. 2 shows a diagram illustrating frequency ranges used in a wireless communication system.
- FIG. 3 is a diagram showing an example of the configuration of a radio frame, a subframe, a slot, and a symbol used in a radio communication system.
- FIG. 4 is a functional block diagram of the base station.
- FIG. 5 is a functional block diagram of the terminal.
- FIG. 6 is a sequence diagram relating to whether or not scheduling is possible, which is transmitted to a terminal.
- FIG. 7 is a sequence diagram relating to the possibility of scheduling transmitted from another base station.
- FIG. 8 is a sequence diagram relating to whether or not scheduling is possible, which is transmitted to the central device.
- FIG. 9 is a sequence diagram for indicating that the number of receiving antennas is small in a message of a random access procedure.
- FIG. 10 is a sequence diagram for indicating that the number of receiving antennas is small in the capability information of the terminal.
- FIG. 11 is a sequence diagram for instructing the core network that the number of receiving antennas is small.
- FIG. 12 is a sequence diagram for instructing the central unit that the number of receiving antennas is small.
- FIG. 13 is a diagram illustrating an example of a hardware configuration of a base station and a terminal.
- FIG. 14 is a diagram illustrating an example of the configuration of a vehicle.
- the wireless communication system 10 shown in Fig. 1 is a wireless communication system conforming to a method called 5G.
- the wireless communication system 10 may be a wireless communication system conforming to a method called Beyond 5G, 5G Evolution, or 6G.
- the wireless communication system 10 can support Massive Multiple-Input Multiple-Output (Massive MIMO), which generates more directional beams by controlling the wireless signals transmitted from multiple antenna elements, Carrier Aggregation (CA), which bundles together multiple component carriers (CC), and Dual Connectivity (DC), which communicates with two base stations simultaneously.
- Massive MIMO Massive Multiple-Input Multiple-Output
- CA Carrier Aggregation
- CC component carriers
- DC Dual Connectivity
- the wireless communication system 10 includes a base station (gNodeB, gNB) 100 connected to a Next Generation-Radio Access Network (NG-RAN) 20, and a terminal (User Equipment, UE) 200 that performs wireless communication with the gNB 100.
- the NG-RAN 20 is connected to a core network (CN) 30.
- the CN 30 is composed of a network function (NF) such as an Access and Mobility Management Function (AMF) 300.
- NF network function
- AMF Access and Mobility Management Function
- the gNB100 may be a base station in a Centralized-Radio Access Network (C-RAN) configuration having a distributed unit (DU) that has the function of connecting to the UE200, and a central unit (CU) that has the function of connecting to the network.
- C-RAN Centralized-Radio Access Network
- DU distributed unit
- CU central unit
- the gNB100 may be interpreted as either a DU or a CU, but in the operational example described below, it will mainly be interpreted as a DU.
- the gNB100 when the gNB100 is a DU, it may be called a gNB-DU, an Integrated Access and Backhaul (IAB) node, a wireless communication node, etc.
- IAB Integrated Access and Backhaul
- the gNB100 is a CU
- IAB donor a gNode
- UE200 may be a 4RX UE equipped with four receiving antennas, or a 2RX UE equipped with fewer than four receiving antennas, but in the operational examples described below, it will be primarily a 2RX UE.
- UE200 may be a wearable device such as glasses (see Figure 1).
- UE200 may be a terminal capable of processing large amounts of data at high speed suitable for XR.
- UE200 may be called an XR terminal, and further, if it is a 2RX UE, it may be called a 2RX XR terminal.
- the wireless communication system 10 may also support a plurality of frequency ranges (FRs). That is, as shown in FIG. 2, the wireless communication system 10 may support the following FRs: ⁇ FR1: 410MHz to 7.125GHz ⁇ FR2-1: 24.25GHz to 52.6GHz ⁇ FR2-2: Over 52.6GHz to 71GHz
- a subcarrier spacing (SCS) of 15, 30 or 60 kHz and a bandwidth (BW) of 5 to 100 MHz may be used.
- SCS subcarrier spacing
- BW bandwidth
- an SCS of 60 or 120 kHz (which may include 240 kHz) and a BW of 50 to 400 MHz may be used.
- Cyclic Prefix-Orthogonal Frequency Division Multiplexing CP-OFDM
- DFT-S-OFDM Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing
- one slot in the wireless communication system 10 is composed of 14 symbols. If this configuration is maintained, the larger (wider) the SCS is, the shorter the symbol period (and slot period) will be.
- the SCS is not limited to the frequencies shown in FIG. 3, and may be, for example, frequencies such as 480 kHz and 960 kHz.
- the number of symbols constituting one slot does not necessarily have to be 14 symbols, and may be, for example, 28 or 56 symbols.
- the number of slots per subframe may differ depending on the SCS.
- the gNB 100 includes a transceiver unit 110, a generation unit 120, an HO unit 130, and a control unit 140.
- the transceiver 110 transmits and receives radio signals to and from the UE 200.
- the transceiver 110 may include a transmitter that transmits radio signals to the UE 200 or other gNBs 100, and a receiver that receives radio signals from the UE 200 or other gNBs 100.
- the radio signals include notification information and messages generated by the generator 120.
- the generation unit 120 generates notification information and messages to be transmitted to the UE 200.
- the notification information may be a system information block such as System Information Block 1 (SIB1).
- SIB1 System Information Block 1
- the message may be a message related to handover of the UE 200 controlled by the HO unit 130, a message related to a random access procedure executed by the UE 200, or a message to be transmitted to the network side.
- the generating unit 120 may indicate whether or not scheduling for 2RX UE is possible in the notification information or message. Whether or not scheduling for 2RX UE is possible may be interpreted as whether or not support for 2RX UE is possible.
- the HO unit 130 controls the handover of the UE 200 to another gNB 100 (or a candidate cell formed by the gNB 100). That is, it executes or cancels the handover of the UE 200.
- the HO unit 130 may control the handover of the UE 200 based on an instruction from the other gNB 100 as to whether or not scheduling for a 2RX UE is possible. That is, the HO unit 130 may check whether or not scheduling for a 2RX UE is possible in the other gNB 100 at the handover destination before executing the handover of the UE 200.
- the control unit 140 controls the gNB 100.
- the control unit 140 controls the transmission and reception of radio signals by the transceiver unit 110, the generation of notification information and messages by the generation unit 120, and the execution or cancellation of handover of the UE 200 by the HO unit 130.
- the control unit 140 may perform different scheduling for the 2RX UE than for the 4RX UE. Specifically, different scheduling may be performed in terms of Modulation Coding Scheme (MCS), transmission frequency, etc.
- MCS Modulation Coding Scheme
- the transceiver 210 transmits and receives wireless signals to and from the gNB100.
- the transceiver 210 may include a transmitter that transmits wireless signals to the gNB100, and a receiver that receives wireless signals from the gNB100.
- the wireless signals include a message generated by the generator 220.
- the generating unit 220 generates a message to be transmitted to the gNB 100.
- the message may be a message related to a random access procedure executed by the RA unit 230.
- the generating unit 220 may indicate in the message that it is a 2RX UE.
- the generation unit 220 may instruct the core network 30 via the gNB100 that it is a 2RX UE by sending a message to the gNB100 indicating that it is a 2RX UE.
- the generation unit 220 may instruct the CU via the gNB100 (DU) that it is a 2RX UE by sending a message to the gNB100 (DU) indicating that it is a 2RX UE.
- the RA unit 230 executes a random access procedure with the gNB 100. Specifically, the RA unit 230 establishes communication with the gNB 100 through the transmission of a message generated by the generation unit 220 and the reception of a message generated by the generation unit 120 of the gNB 100. The transmission and reception of various messages in the random access procedure will be explained in the operation example described later.
- the RA unit 230 may execute a random access procedure with the gNB 100 based on an instruction from the gNB 100 as to whether or not scheduling for a 2RX UE is possible. In other words, if the UE 200 is a 2RX UE, the RA unit 230 may execute a random access procedure with the gNB 100 after confirming that the gNB 100 is expecting scheduling for a 2RX UE.
- the control unit 240 controls the UE 200.
- the control unit 240 controls the transmission and reception of radio signals by the transceiver unit 210, the generation of messages by the generation unit 220, and the execution of random access by the RA unit 230.
- the gNB 100 can instruct the UE 200 whether or not to perform scheduling for 2RX UE.
- This instruction may be called a barring indication because it indicates whether or not to perform scheduling.
- This indication may be an IE (or an indication in the IE) such as: ⁇ cellBarredTwoRX-XR-UE ENUMERATED ⁇ barred, not barred ⁇
- This instruction may also be an instruction as to whether or not to perform scheduling for a Reduced Capability UE (RedCap UE).
- the instruction as to whether or not to perform scheduling for a RedCap UE may be reused.
- the instruction as to whether or not to perform scheduling for a RedCap UE is, for example, cellBarredRedCap2Rx (barred, not barred) in SIB1.
- RedCap UE refers to a UE with limited capabilities. Specifically, it may refer to a terminal that supports a narrower bandwidth than conventional UEs (e.g., up to 20 MHz).
- the broadcast information may be a system information block such as SIB1. That is, the gNB100 may indicate in the broadcast information whether or not scheduling for 2RX UE is possible.
- the gNB100 can indicate in the broadcast information whether or not scheduling for a 2RX UE is possible. This allows the UE200 to request random access only from a gNB100 that assumes scheduling for a 2RX UE, thereby preventing a gNB100 that does not assume scheduling for a 2RX UE from mistakenly communicating with a 2RX UE.
- the gNB100 can reuse the instruction on whether to perform scheduling for RedCap UE and instruct whether to perform scheduling for 2RX UE. This eliminates the need to set a new IE, thereby reducing the burden on the gNB100.
- the gNB100 can receive an instruction of whether or not the other gNB100 can schedule the 2RX UE from the other gNB100.
- the other gNB100 is described as a base station that forms a candidate cell for handover of the UE200.
- either of the gNB1 and gNB2 in the figure may be the other gNB100 that transmits an instruction of whether or not the scheduling for the 2RX UE can be performed, and either of them may be the gNB100 that receives this instruction.
- the indication of whether or not scheduling for the 2RX UE is possible may be an IE (or an indication in that IE) such as a Served Cell Information NR IE.
- the indication of whether or not scheduling for the 2RX UE is possible may be received at the Xn interface.
- the Served Cell Information NR IE may be included in a configuration request message such as an Xn setup request message, or may be included in a configuration change message such as an NG-RAN NODE CONFIGURATION UPDATE message.
- the gNB100 receives an instruction as to whether or not scheduling for a 2RX UE is possible, and controls the handover of UE200, which is a 2RX UE, based on this instruction. In other words, if it receives an instruction from another gNB100 that scheduling for a 2RX UE is possible, it executes the handover, and if it receives an instruction that scheduling for a 2RX UE is not possible, it cancels the handover.
- gNB100 when performing a handover of UE200, which is a 2RX UE, gNB100 can know whether or not other gNB100 can perform scheduling for a 2RX UE. This allows gNB100 to avoid the risk of performing a handover to a gNB that does not anticipate scheduling for a 2RX UE.
- the indication of whether or not scheduling for the 2RX UE is possible may be an IE (or an indication in that IE) such as Served Cell Information.
- the indication of whether or not scheduling for the 2RX UE is possible may be sent on the F1 AP interface.
- the Served Cell Information may be included in a configuration request message such as an F1 SETUP REQUEST message, or may be included in a configuration change message such as a GNB-DU CONFIGURATION UPDATE message.
- the gNB100 (DU) can instruct the CU on whether or not to schedule for a 2RX UE. This allows the CU to know which gNB100 (DU) is intended for scheduling for a 2RX UE, making it possible to avoid the risk of erroneously controlling a gNB100 (DU) that is not intended for scheduling for a 2RX UE to communicate with a 2RX UE.
- UE200 when starting the random access procedure, UE200 transmits a physical random access channel (PRACH) in the RACH resource set by gNB100 (corresponding to Msg1 in the figure). Note that PRACH may be interpreted as a preamble.
- PRACH physical random access channel
- UE200 receives a physical downlink shared channel (PDSCH) as a Random Access Response (RAR) (not shown).
- PDSCH physical downlink shared channel
- RAR Random Access Response
- UE200 transmits a PUSCH as an RRC connection request message (corresponding to Msg3 in the figure).
- UE200 receives a PDSCH as a contention resolution message (not shown).
- RRC setup complete message (corresponding to RRCSetupComplete in the figure). Note that the RRC setup complete message may be called Msg5 or a message indicating the completion of the random access procedure.
- UE200 can indicate that it is a 2RX UE (including indicating that it is a 2RX UE) in these messages (Msg1/Msg3/RRCSetupComplete). The instructions in each message are explained in detail below.
- UE200 When indicating in Msg1, UE200 indicates that it is a 2RX UE by transmitting a preamble on a RACH resource dedicated to 2RX UE. Since the preamble is transmitted on a RACH resource dedicated to 2RX UE, gNB100 can identify that UE200 transmitting the preamble is a 2RX UE. The RACH resource dedicated to 2RX UE may be notified by the notification information transmitted by gNB100.
- UE200 When indicating in Msg3, UE200 indicates that it is a 2RX UE by the code point of the logical channel identifier (e.g., LCID for UL-SCH) included in Msg3. In this case, a new code point may be introduced to indicate that it is a 2RX UE (or that it is not a 2RX UE).
- gNB100 can identify that UE200 sending Msg3 is a 2RX UE from the code point included in Msg3.
- UE200 When specifying in Msg5, UE200 transmits Msg5 including an indication that it is a 2RX UE. gNB100 can identify that UE200 transmitting Msg5 is a 2RX UE from the indication that it is a 2RX UE contained in Msg5.
- UE200 can transmit a message indicating that it is a 2RX UE during the random access procedure. This allows gNB100 to know that UE200 performing the random access procedure is a 2RX UE, and therefore, after the random access procedure is completed, it can perform appropriate scheduling for the 2RX UE.
- UE 200 may send UE capability signaling to gNB 100 indicating that it is a 2RX UE. This allows gNB 100 to perform appropriate scheduling for the 2RX UE, although only after the random access procedure has been completed.
- the UE 200 can instruct the gNB 100 that it is a 2RX UE. Furthermore, as shown in Fig. 11, the gNB 100 may instruct the core network 30 that it is a 2RX UE. In other words, the UE 200 may instruct the core network 30 via the gNB 100 that it is a 2RX UE. Specifically, the UE 200 may instruct the AMF 300 constituting the core network 30 that it is a 2RX UE.
- the instruction from gNB100 to the core network 30 (AMF300) that it is a 2RX UE may be executed at the NG-AP interface. Specifically, the instruction that it is a 2RX UE may be included in a message (e.g., INITIAL UE MESSAGE) sent from gNB100 to the core network 30 (AMF300) that includes an identifier of UE200 assigned by gNB100.
- a message e.g., INITIAL UE MESSAGE
- UE200 can instruct the core network 30 (AMF300) via gNB100 that it is a 2RX UE. This allows the core network 30 (AMF300) to understand that UE200 is a 2RX UE.
- the AMF300 identifies the 2RX UE and can set a longer paging DRX cycle (predetermined time interval for paging) compared to a conventional UE (4RX UE). This allows the 2RX UE to achieve power saving effects.
- the UE 200 can instruct the gNB 100 that it is a 2RX UE. Furthermore, as shown in Fig. 12, when the gNB 100 is a distributed unit (DU), it may instruct the central unit (CU) that it is a 2RX UE. In other words, the UE 200 may instruct the CU via the gNB 100 (DU) that it is a 2RX UE.
- DU distributed unit
- CU central unit
- UE 200 may instruct the CU via the gNB 100 (DU) that it is a 2RX UE.
- the instruction from gNB100 (DU) to the CU that it is a 2RX UE may be executed in the F1 AP interface. Specifically, the instruction that it is a 2RX UE may be included in a message (e.g., INITIAL UL RRC MESSAGE TRANSFER) sent from gNB100 (DU) to the CU, which includes a Cell-Radio Network Temporary Identifier (C-RNTI) assigned by gNB100 (DU).
- a message e.g., INITIAL UL RRC MESSAGE TRANSFER
- C-RNTI Cell-Radio Network Temporary Identifier assigned by gNB100 (DU).
- UE200 can instruct the CU via gNB100 (DU) that it is a 2RX UE. This allows the CU to understand that UE200 is a 2RX UE.
- DU gNB100
- UE200 may instruct (notify) the CU (gNB-CU) that it is a 2RX UE in RRCSetupComplete or UE capability signaling.
- the DU gNB-DU
- the CU may instruct (notify) the DU that this UE200 is a 2RX UE.
- the above disclosure is not limited to 2RX UEs (compared to 4RX UEs), but can be applied to UEs with different receiving sensitivity than other UEs. For example, it can be applied to UEs equipped with antennas with relatively low receiving sensitivity even if they have the same number of receiving antennas. Also, in the future, if 8RX UEs equipped with eight receiving antennas (8RX) become widespread, the above disclosure can be applied to UEs with fewer receiving antennas than 8RX UEs (seven or fewer receiving antennas).
- the above disclosure may be applied to 4RX UEs instead of 2RX UEs.
- a gNB100 that does not assume scheduling for 4RX UEs.
- Such a gNB100 may indicate whether or not scheduling for 4RX UEs is possible, and the UE200 may indicate that it is a 4RX UE.
- configuration may be interpreted to mean that a predetermined value or parameter is pre-configured, or that a value or parameter is set by the gNB100 or UE200.
- base station may be read as “node” or “cell.” Also, in handover, “base station (source of handover)” may be read as “source base station” or “source cell,” and “base station (destination of handover)” may be read as “target base station” or “target cell.”
- gNB100 controls handover and UE200 controls random access procedure, but this is not limited to the above.
- gNB100 may control random access procedure and UE200 may control handover.
- either gNB100 or UE200 may control both handover and random access procedure, or both gNB100 and UE200 may cooperate to control both handover and random access procedure.
- operation examples 1 to 3 may be combined with at least one of operation examples 4 to 6.
- configure, activate, update, indicate, enable, specify, and select may be read as interchangeable.
- link, associate, correspond, and map may be read as interchangeable, and allocate, assign, monitor, and map may also be read as interchangeable.
- each functional block may be realized using one device that is physically or logically coupled, or may be realized using two or more devices that are physically or logically separated and connected directly or indirectly (e.g., using wires, wirelessly, etc.) and these multiple devices.
- the functional blocks may be realized by combining the one device or the multiple devices with software.
- Functions include, but are not limited to, judgement, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, regard, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment.
- a functional block (component) that performs the transmission function is called a transmitting unit or transmitter.
- FIG. 13 is a diagram showing an example of the hardware configuration of the device.
- the device may be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.
- apparatus can be interpreted as a circuit, device, unit, etc.
- the hardware configuration of the apparatus may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.
- each function of the device is realized by loading a specific software (program) onto hardware such as the processor 1001 and memory 1002, causing the processor 1001 to perform calculations, control communications by the communications device 1004, and control at least one of reading and writing data in the memory 1002 and storage 1003.
- a specific software program
- the processor 1001 for example, runs an operating system to control the entire computer.
- the processor 1001 may be configured as a central processing unit (CPU) that includes an interface with peripheral devices, a control unit, an arithmetic unit, registers, etc.
- CPU central processing unit
- the processor 1001 also reads out programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these.
- the programs used are those that cause a computer to execute at least some of the operations described in the above-mentioned embodiments.
- the various processes described above may be executed by one processor 1001, or may be executed simultaneously or sequentially by two or more processors 1001.
- the processor 1001 may be implemented by one or more chips.
- the programs may be transmitted from a network via a telecommunications line.
- Memory 1002 is a computer-readable recording medium and may be composed of, for example, at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), Random Access Memory (RAM), etc.
- Memory 1002 may also be called a register, cache, main memory, etc.
- Memory 1002 can store a program (program code), software module, etc. capable of executing a method according to one embodiment of the present disclosure.
- Storage 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc.
- Storage 1003 may also be referred to as an auxiliary storage device.
- the above-mentioned recording medium may be, for example, a database, a server, or other suitable medium including at least one of memory 1002 and storage 1003.
- the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc.
- the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to realize, for example, at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside.
- the output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one structure (e.g., a touch panel).
- each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using different buses between each device.
- the device may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware.
- DSP digital signal processor
- ASIC application specific integrated circuit
- PLD programmable logic device
- FPGA field programmable gate array
- the processor 1001 may be implemented using at least one of these pieces of hardware.
- the notification of information is not limited to the aspects/embodiments described in the present disclosure and may be performed using other methods.
- the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., RRC signaling, Medium Access Control (MAC) signaling), broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination of these.
- RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- SUPER 3G IMT-Advanced
- 4G 5th generation mobile communication system
- 5G Future Radio Access
- FAA New Radio
- NR New Radio
- W-CDMA registered trademark
- GSM registered trademark
- UMB Ultra Mobile Broadband
- IEEE 802.11 Wi-Fi (registered trademark)
- IEEE 802.16 WiMAX (registered trademark)
- IEEE 802.20 Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable systems and next generation systems enhanced therefrom.
- Multiple systems may also be applied in combination (e.g., a combination of at least one of LTE and LTE-A with 5G).
- certain operations that are described as being performed by a base station may in some cases be performed by its upper node.
- various operations performed for communication with terminals may be performed by at least one of the base station and other network nodes other than the base station (such as, but not limited to, an MME or S-GW).
- the above example shows a case where there is one other network node other than the base station, it may also be a combination of multiple other network nodes (such as an MME and an S-GW).
- Information, signals can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). They may be input and output via multiple network nodes.
- the input and output information may be stored in a specific location (e.g., memory) or may be managed using a management table.
- the input and output information may be overwritten, updated, or appended.
- the output information may be deleted.
- the input information may be sent to another device.
- the determination may be based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., a comparison with a predetermined value).
- notification of specific information is not limited to being done explicitly, but may be done implicitly (e.g., not notifying the specific information).
- Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
- software, instructions, information, etc. may be transmitted and received over a transmission medium.
- a transmission medium For example, if software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and/or wireless technologies (such as infrared, microwave, etc.), then at least one of these wired and wireless technologies is included within the definition of a transmission medium.
- wired technologies such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)
- wireless technologies such as infrared, microwave, etc.
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
- the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.
- the channel and the symbol may be a signal (signaling).
- the signal may be a message.
- the component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.
- system and “network” are used interchangeably.
- a radio resource may be indicated by an index.
- the names used for the above-mentioned parameters are not limiting in any respect. Furthermore, the formulas etc. using these parameters may differ from those explicitly disclosed in this disclosure.
- the various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any respect.
- Base station BS
- wireless base station fixed station
- NodeB NodeB
- eNodeB eNodeB
- gNodeB gNodeB
- a base station can accommodate one or more (e.g., three) cells (also called sectors). If a base station accommodates multiple cells, the overall coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head: RRH)).
- a base station subsystem e.g., a small indoor base station (Remote Radio Head: RRH)
- cell refers to part or all of the coverage area of a base station and/or a base station subsystem that provides communication services within that coverage.
- MS Mobile Station
- UE User Equipment
- a mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc.
- At least one of the base station and the mobile station may be a device mounted on a moving object, or the moving object itself, etc.
- the moving object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned).
- At least one of the base station and the mobile station may include a device that does not necessarily move during communication operations.
- at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be interpreted as a mobile station (user terminal, the same applies below).
- each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a mobile station is replaced with communication between multiple mobile stations (which may be called, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
- the mobile station may be configured to have the functions of a base station.
- terms such as "uplink” and "downlink” may be interpreted as terms corresponding to communication between terminals (for example, "side”).
- the uplink channel, downlink channel, etc. may be interpreted as a side channel.
- the mobile station in this disclosure may be interpreted as a base station.
- the base station may be configured to have the functions of the mobile station.
- a radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe.
- a subframe may further be composed of one or more slots in the time domain.
- a subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.
- a slot may consist of one or more symbols in the time domain (e.g., Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.).
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- a slot may be a numerology-based unit of time.
- a slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot.
- a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A.
- a PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.
- Radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals. Radio frame, subframe, slot, minislot, and symbol may each be referred to by a different name that corresponds to the radio frame, subframe, slot, minislot, and symbol.
- one subframe may be called a transmission time interval (TTI)
- TTI transmission time interval
- multiple consecutive subframes may be called a TTI
- one slot or one minislot may be called a TTI.
- at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms.
- the unit expressing the TTI may be called a slot, minislot, etc., instead of a subframe.
- TTI refers to, for example, the smallest time unit for scheduling in wireless communication.
- a base station schedules each user terminal by allocating radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) in TTI units.
- radio resources such as frequency bandwidth and transmission power that can be used by each user terminal
- the TTI may be a transmission time unit for a channel-coded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc.
- the time interval e.g., the number of symbols
- the time interval in which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.
- one slot or one minislot when called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling.
- the number of slots (minislots) that constitute the minimum time unit of scheduling may be controlled.
- a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
- TTI shorter than a normal TTI may be referred to as a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.
- a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms
- a short TTI e.g., a shortened TTI, etc.
- a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
- the number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12.
- the number of subcarriers included in an RB may be determined based on the numerology.
- the time domain of an RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length.
- One TTI, one subframe, etc. may each be composed of one or more resource blocks.
- one or more RBs may also be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.
- PRB physical resource block
- SCG sub-carrier group
- REG resource element group
- PRB pair an RB pair, etc.
- a resource block may be composed of one or more resource elements (RE).
- RE resource elements
- one RE may be a radio resource area of one subcarrier and one symbol.
- a Bandwidth Part which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by an index of the RB relative to a common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
- UL BWP UL BWP
- DL BWP DL BWP
- One or more BWPs may be configured for a UE within one carrier.
- At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
- BWP bitmap
- radio frames, subframes, slots, minislots, and symbols are merely examples.
- the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, as well as the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
- connection refers to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
- the coupling or connection between elements may be physical, logical, or a combination thereof.
- “connected” may be read as "access.”
- two elements may be considered to be “connected” or “coupled” to each other using at least one of one or more wires, cables, and printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.
- the reference signal may also be abbreviated as Reference Signal (RS) or referred to as a pilot depending on the applicable standard.
- RS Reference Signal
- the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
- any reference to an element using a designation such as "first,” “second,” etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed therein or that the first element must precede the second element in some way.
- determining may encompass a wide variety of actions.
- Determining and “determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., searching in a table, database, or other data structure), ascertaining something that is deemed to be a “judging” or “determining,” and the like.
- Determining and “determining” may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like.
- judgment and “decision” can include considering resolving, selecting, choosing, establishing, comparing, etc., to have been “judged” or “decided.” In other words, “judgment” and “decision” can include considering some action to have been “judged” or “decided.” Additionally, “judgment” can be interpreted as “assuming,” “expecting,” “considering,” etc.
- a and B are different may mean “A and B are different from each other.”
- the term may also mean “A and B are each different from C.”
- Terms such as “separate” and “combined” may also be interpreted in the same way as “different.”
- FIG. 14 shows an example of the configuration of a vehicle 2001.
- the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013.
- the drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor.
- the steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.
- a steering wheel also called a handle
- the electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2027 provided in the vehicle.
- the electronic control unit 2010 may also be called an ECU (Electronic Control Unit).
- Signals from the various sensors 2021 to 2028 include a current signal from a current sensor 2021 that senses the current of the motor, a rotation speed signal of the front and rear wheels acquired by a rotation speed sensor 2022, an air pressure signal of the front and rear wheels acquired by an air pressure sensor 2023, a vehicle speed signal acquired by a vehicle speed sensor 2024, an acceleration signal acquired by an acceleration sensor 2025, an accelerator pedal depression amount signal acquired by an accelerator pedal sensor 2029, a brake pedal depression amount signal acquired by a brake pedal sensor 2026, a shift lever operation signal acquired by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by an object detection sensor 2028.
- the information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing various types of information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices.
- the information service unit 2012 uses information acquired from external devices via the communication module 2013, etc., to provide various types of multimedia information and multimedia services to the occupants of the vehicle 1.
- the driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driving burden on the driver, such as a millimeter wave radar, LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high definition (HD) map, autonomous vehicle (AV) map, etc.), a gyro system (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chip, and an AI processor, as well as one or more ECUs that control these devices.
- the driving assistance system unit 2030 also transmits and receives various information via the communication module 2013 to realize driving assistance functions or autonomous driving functions.
- the communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 1 via the communication port.
- the communication module 2013 transmits and receives data via the communication port 2033 between the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in electronic control unit 2010, and sensors 2021 to 2028, which are provided on the vehicle 2001.
- the communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication.
- the communication module 2013 may be located either inside or outside the electronic control unit 2010.
- the external device may be, for example, a base station, a mobile station, etc.
- the communication module 2013 transmits a current signal from the current sensor input to the electronic control unit 2010 to an external device via wireless communication.
- the communication module 2013 also transmits to an external device via wireless communication the following signals input to the electronic control unit 2010: a front wheel or rear wheel rotation speed signal acquired by a rotation speed sensor 2022, a front wheel or rear wheel air pressure signal acquired by an air pressure sensor 2023, a vehicle speed signal acquired by a vehicle speed sensor 2024, an acceleration signal acquired by an acceleration sensor 2025, an accelerator pedal depression amount signal acquired by an accelerator pedal sensor 2029, a brake pedal depression amount signal acquired by a brake pedal sensor 2026, a shift lever operation signal acquired by a shift lever sensor 2027, and a detection signal for detecting an obstacle, a vehicle, a pedestrian, etc. acquired by an object detection sensor 2028.
- the communication module 2013 receives various information (traffic information, signal information, vehicle distance information, etc.) transmitted from an external device, and displays it on an information service unit 2012 provided in the vehicle.
- the communication module 2013 also stores the various information received from the external device in a memory 2032 that can be used by the microprocessor 2031.
- the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, axles 2009, sensors 2021-2028, and the like provided in the vehicle 2001.
- the first feature is a terminal that includes a control unit that executes a random access procedure with a base station, and a transmission unit that transmits a message indicating that the terminal has a smaller number of receiving antennas than other terminals during the random access procedure, and the message is transmitted in a dedicated resource for the terminal when the random access procedure is started.
- the second feature is a terminal that includes a control unit that executes a random access procedure with a base station, and a transmission unit that transmits a message in the random access procedure indicating that the terminal has a smaller number of receiving antennas than other terminals, the message including a code point indicating that the terminal is the terminal.
- the third feature is a terminal that includes a control unit that executes a random access procedure with a base station, and a transmission unit that transmits a message indicating that the terminal has a smaller number of receiving antennas than other terminals in the random access procedure, the message indicating the completion of the random access procedure.
- the fourth feature is that in any one of the first to third features, the transmitter transmits an indication that the terminal is the terminal to a core network via the base station.
- the fifth feature is the terminal of the fourth feature, in which the instruction from the base station to the core network is included in a message including an identifier of the terminal assigned by the base station.
- the sixth feature is that in any of the first to fifth features, the transmitter is a terminal that instructs a central device that it is the terminal via a distributed device that constitutes the base station.
- Wireless Communication Systems 20 NG-RAN 30CN 100 gNB 110 Transmitter/receiver 120 Generator 130 HO unit 140 Controller 200 UE 210 Transmitting/receiving unit 220 Generating unit 230 RA unit 240 Control unit 300
- AMF 1001 processor 1002 memory 1003 storage 1004 communication device 1005 input device 1006 output device 1007 bus 2001 vehicle 2002 drive unit 2003 steering unit 2004 accelerator pedal 2005 brake pedal 2006 shift lever 2007 left and right front wheels 2008 left and right rear wheels 2009 axle 2010 electronic control unit 2012 information service unit 2013 communication module 2021 current sensor 2022 rotation speed sensor 2023 air pressure sensor 2024 vehicle speed sensor 2025 acceleration sensor 2026 brake pedal sensor 2027 shift lever sensor 2028 object detection sensor 2029 accelerator pedal sensor 2030 driving support system unit 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 communication port
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Abstract
Description
図1に示す無線通信システム10は、5Gと呼ばれる方式に従った無線通信システムである。一方で、無線通信システム10は、Beyond 5G、5G Evolutionあるいは6Gと呼ばれる方式に従った無線通信システムであってもよい。
・FR1:410MHz~7.125GHz
・FR2-1:24.25GHz~52.6GHz
・FR2-2: 52.6GHz超~71GHz
(2.1)基地局の機能ブロック構成
図4に示すように、gNB100は、送受信部110と、生成部120と、HO部130と、制御部140とを備える。
図5に示すように、UE200は、送受信部210と、生成部220と、RA部230と、制御部240とを備える。
(3.1)課題
(3.1.1)課題1
2RX UE用のスケジューリングを想定していないgNBも存在する。このようなgNBであっても、2RX UEを識別することが出来ないため、2RX UEからランダムアクセスを要求されると、2RX UEとの通信を実行してしまうおそれがあった。
2RX UE用のスケジューリングを想定していないgNBも存在する。このようなgNBに対して、2RX UEのハンドオーバを実行してしまうおそれがあった。
2RX UE用のスケジューリングを想定していないgNB(DU)も存在する。このようなgNB(DU)に対しても、2RX UEとの通信を実行するようにCUが制御するおそれがあった。
gNBは、UEからランダムアクセスを要求されても、当該UEが2RX UEであるか否かを識別することが出来ない。そのため、ランダムアクセス手順が完了した後も、2RX UEに対して適切でないスケジューリングを実行してしまうおそれがあった。
課題4において、AMFは、UEからランダムアクセスを要求されても、当該UEが2RX UEであるか否かを識別することが出来ないという問題があった。
課題4において、gNBがDUである場合、CUは、UEからランダムアクセスを要求されても、当該UEが2RX UEであるか否かを識別することが出来ないという問題があった。
(3.2.1)動作例1
図6に示すように、gNB100は、UE200に対して、2RX UE用のスケジューリングの可否を指示することができる。この指示は、スケジューリングの可否を指示することから、barring indicationと呼ばれてもよい。
・cellBarredTwoRX-XR-UE ENUMERATED {barred, not barred}
図7に示すように、gNB100は、他のgNB100から、他のgNB100における2RX UE用のスケジューリングの可否の指示を受信することができる。以下では、他のgNB100は、UE200のハンドオーバの候補セルを形成する基地局であるものとして説明する。なお、図中のgNB1、gNB2のうち、いずれが2RX UE用のスケジューリングの可否の指示を送信する他のgNB100であってもよく、いずれがこの指示を受信するgNB100であってもよい。
図8に示すように、gNB100が、分散装置(DU)である場合、中央装置(CU)に対して、2RX UE用のスケジューリングの可否を指示することができる。
図9に示すように、UE200は、gNB100に対して、ランダムアクセス手順を実行する。ここで、ランダムアクセス手順について簡単に説明する。
動作例4で説明したように、UE200は、gNB100に対して、2RX UEであることを指示することが出来る。さらに、図11に示すように、gNB100は、コアネットワーク30に対して、2RX UEであることを指示してもよい。換言すれば、UE200は、gNB100を介して、コアネットワーク30に対して、2RX UEであることを指示してもよい。具体的には、コアネットワーク30を構成するAMF300に対して、2RX UEであることを指示してもよい。
動作例4で説明したように、UE200は、gNB100に対して、2RX UEであることを指示することが出来る。さらに、図12に示すように、gNB100が、分散装置(DU)である場合、中央装置(CU)に対して、2RX UEであることを指示してもよい。換言すれば、UE200は、gNB100(DU)を介して、CUに対して、2RX UEであることを指示してもよい。
以上、実施形態に沿って本発明の内容を説明したが、本発明はこれらの記載に限定されるものではなく、種々の変形及び改良が可能であることは、当業者には自明である。
上述した開示は、以下のように表現されてもよい。
20 NG-RAN
30 CN
100 gNB
110 送受信部
120 生成部
130 HO部
140 制御部
200 UE
210 送受信部
220 生成部
230 RA部
240 制御部
300 AMF
1001 プロセッサ
1002 メモリ
1003 ストレージ
1004 通信装置
1005 入力装置
1006 出力装置
1007 バス
2001 車両
2002 駆動部
2003 操舵部
2004 アクセルペダル
2005 ブレーキペダル
2006 シフトレバー
2007 左右の前輪
2008 左右の後輪
2009 車軸
2010 電子制御部
2012 情報サービス部
2013 通信モジュール
2021 電流センサ
2022 回転数センサ
2023 空気圧センサ
2024 車速センサ
2025 加速度センサ
2026 ブレーキペダルセンサ
2027 シフトレバーセンサ
2028 物体検出センサ
2029 アクセルペダルセンサ
2030 運転支援システム部
2031 マイクロプロセッサ
2032 メモリ(ROM、RAM)
2033 通信ポート
Claims (6)
- 基地局とランダムアクセス手順を実行する制御部と、
前記ランダムアクセス手順において、他の端末よりも受信アンテナ数が少ない端末であることを指示するメッセージを送信する送信部と、
を備え、
前記メッセージは、前記ランダムアクセス手順を開始するにあたって、前記端末の専用リソースにおいて送信される、
端末。 - 基地局とランダムアクセス手順を実行する制御部と、
前記ランダムアクセス手順において、他の端末よりも受信アンテナ数が少ない端末であることを指示するメッセージを送信する送信部と、
を備え、
前記メッセージは、前記端末であることを指示するコードポイントを含む、
端末。 - 基地局とランダムアクセス手順を実行する制御部と、
前記ランダムアクセス手順において、他の端末よりも受信アンテナ数が少ない端末であることを指示するメッセージを送信する送信部と、
を備え、
前記メッセージは、前記ランダムアクセス手順の完了を指示する、
端末。 - 前記送信部は、前記基地局を介して、コアネットワークに前記端末であることの指示を送信する、
請求項1に記載の端末。 - 前記基地局から前記コアネットワークへの指示は、前記基地局が割り当てる前記端末の識別子を含むメッセージに含まれる、
請求項4に記載の端末。 - 前記送信部は、前記基地局を構成する分散装置を介して、中央装置に前記端末であることを指示する、
請求項1に記載の端末。
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| PCT/JP2023/013683 WO2024202053A1 (ja) | 2023-03-31 | 2023-03-31 | 端末 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2023/013683 Ceased WO2024202053A1 (ja) | 2023-03-31 | 2023-03-31 | 端末 |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2024202053A1 (ja) |
| CN (1) | CN120712882A (ja) |
| WO (1) | WO2024202053A1 (ja) |
-
2023
- 2023-03-31 WO PCT/JP2023/013683 patent/WO2024202053A1/ja not_active Ceased
- 2023-03-31 CN CN202380094460.2A patent/CN120712882A/zh active Pending
- 2023-03-31 JP JP2025509632A patent/JPWO2024202053A1/ja active Pending
Non-Patent Citations (4)
| Title |
|---|
| ERICSSON: "Early indication & access restriction for RedCap UEs", 3GPP DRAFT; R2-2111098, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), vol. RAN WG2, no. Electronic meeting; 20211101 - 20211112, 22 October 2021 (2021-10-22), FR, XP052067534 * |
| FUJITSU: "Device type definition and how to signal the device type to network", 3GPP DRAFT; R2-2009008, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), vol. RAN WG2, no. electronic; 20201101, 23 October 2020 (2020-10-23), FR, XP052362061 * |
| HUAWEI: "Summary of email discussion 914 on UE identification and access restrictions", 3GPP DRAFT; R2-2009936, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), vol. RAN WG2, no. Online; 20201102 - 20201113, 23 October 2020 (2020-10-23), FR, XP052362981 * |
| NOKIA, NOKIA SHANGHAI BELL - MODERATOR: "Summary of Offline Discussion – Redcap 2- eDRX Aspects", 3GPP DRAFT; R3-216122, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), vol. RAN WG3, no. Online; 20211101 - 20211111, 10 November 2021 (2021-11-10), FR, XP052098724 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN120712882A (zh) | 2025-09-26 |
| JPWO2024202053A1 (ja) | 2024-10-03 |
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