WO2025035361A1 - 用于无线通信的方法及设备 - Google Patents
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- WO2025035361A1 WO2025035361A1 PCT/CN2023/112932 CN2023112932W WO2025035361A1 WO 2025035361 A1 WO2025035361 A1 WO 2025035361A1 CN 2023112932 W CN2023112932 W CN 2023112932W WO 2025035361 A1 WO2025035361 A1 WO 2025035361A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/34—Reselection control
- H04W36/36—Reselection control by user or terminal equipment
Definitions
- the present application relates to the field of communication technology, and more specifically to a method and device for wireless communication.
- Layer 1/Layer 2-triggered mobility supports the terminal device to establish uplink synchronization with the candidate cell in advance.
- the early uplink synchronization process is triggered and indicated by the source cell's L1-based measurement results. In the future, the terminal device may not need to report the L1-based measurement results. In this case, how to achieve early uplink synchronization between the terminal device and the candidate cell is an urgent problem to be solved.
- the present application provides a method and device for wireless communication.
- the following introduces various aspects of the present application.
- a method for wireless communication comprising: a first terminal device determines whether to initiate an early uplink synchronization process to a first LTM candidate cell based on a first condition; wherein the first condition is associated with one or more of the following: an L1 measurement result of the LTM candidate cell; the location of the terminal device; a first timer; a moving speed of the terminal device; and whether the TA value of the LTM candidate cell is known.
- a method for wireless communication comprising: a first terminal device sends a random access request to a network device, the random access request is used to perform uplink synchronization with an LTM candidate cell in advance, the random access request is associated with a first random access resource, and the first random access resource is one of the following: a CFRA resource; a two-step CBRA resource; and a four-step CBRA resource.
- a method for wireless communication comprising: a network device sends first configuration information to a first terminal device, the first configuration information is used to determine a first condition, the first condition is used to determine whether to initiate an early uplink synchronization process to a first LTM candidate cell; wherein the first condition is associated with one or more of the following: L1 measurement results of the LTM candidate cell; the location of the terminal device; a first timer; a moving speed of the terminal device; and whether the TA value of the LTM candidate cell is known.
- a method for wireless communication comprising: a network device receives a random access request sent by a first terminal device, the random access request is used to perform uplink synchronization with an LTM candidate cell in advance, the random access request is associated with a first random access resource, and the first random access resource is one of the following: a CFRA resource; a two-step CBRA resource; and a four-step CBRA resource.
- a terminal device wherein the terminal device is a first terminal device, and the terminal device includes: a determination unit, used to determine whether to initiate an early uplink synchronization process to a first LTM candidate cell according to a first condition; wherein the first condition is associated with one or more of the following: L1 measurement results of the LTM candidate cell; the location of the terminal device; a first timer; a moving speed of the terminal device; and whether the TA value of the LTM candidate cell is known.
- a terminal device wherein the terminal device is a first terminal device, and the terminal device includes: a first sending unit, used to send a random access request to a network device, wherein the random access request is used to perform uplink synchronization with an LTM candidate cell in advance, and the random access request is associated with a first random access resource, and the first random access resource is one of the following: a CFRA resource; a two-step CBRA resource; and a four-step CBRA resource.
- a network device including: a sending unit, used to send first configuration information to a first terminal device, the first configuration information is used to determine a first condition, the first condition is used to determine whether to initiate an early uplink synchronization process to a first LTM candidate cell; wherein the first condition is associated with one or more of the following: L1 measurement results of the LTM candidate cell; the location of the terminal device; a first timer; the moving speed of the terminal device; and whether the TA value of the LTM candidate cell is known.
- a network device comprising: a first receiving unit, used to receive a random access request sent by a first terminal device, the random access request being used to perform uplink synchronization with an LTM candidate cell in advance, the random access request being associated with a first random access resource, the first random access resource being one of the following: CFRA resource; two-step CBRA resource; and four-step CBRA resource.
- a terminal device comprising a processor, a memory and a communication interface, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the terminal device executes part or all of the steps in the method of the first aspect or the second aspect.
- a network device comprising a processor, a memory, and a communication interface, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the network device executes part or all of the steps in the method of the third aspect or the fourth aspect.
- an embodiment of the present application provides a communication system, the system including the above-mentioned terminal device and/or network device.
- the system may also include the scheme provided in the embodiment of the present application for communicating with the terminal device or network device. other devices that are interconnected.
- an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a terminal device to execute part or all of the steps in the method of the first aspect or the second aspect above.
- an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a network device to execute part or all of the steps in the method of the third aspect or the fourth aspect above.
- an embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a terminal device to perform some or all of the steps in the method of the first aspect or the second aspect above.
- the computer program product can be a software installation package.
- an embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a network device to perform some or all of the steps in the method of the third aspect or the fourth aspect above.
- the computer program product can be a software installation package.
- an embodiment of the present application provides a chip, which includes a memory and a processor.
- the processor can call and run a computer program from the memory to implement part or all of the steps described in the method of any one of the first to fourth aspects above.
- the terminal device can initiate an early uplink synchronization process with the LTM candidate cell, thereby helping the terminal device to achieve the early uplink synchronization process with the LTM candidate cell without reporting the L1 measurement result, or when the network device does not trigger the early uplink synchronization and does not indicate the early uplink synchronization resources.
- the triggering condition of early uplink synchronization i.e., the first condition
- FIG1 is a schematic diagram of a wireless communication system used in an embodiment of the present application.
- FIG. 2 is a schematic flow chart of a cell switching process based on L3 measurement/signaling.
- FIG. 3 is a schematic diagram of a conditional switching process.
- FIG. 4 is a schematic diagram of a cell switching process based on LTM.
- FIG5 is a schematic flow chart of a method for wireless communication provided in accordance with an embodiment of the present application.
- FIG6 is a schematic flow chart of a method for wireless communication provided in another embodiment of the present application.
- FIG. 7 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application.
- FIG8 is a schematic diagram of the structure of another terminal device provided in an embodiment of the present application.
- FIG. 9 is a schematic diagram of the structure of a network device provided in an embodiment of the present application.
- FIG. 10 is a schematic diagram of the structure of another network device provided in an embodiment of the present application.
- FIG. 11 is a schematic diagram of the structure of a device provided in an embodiment of the present application.
- FIG1 is a wireless communication system 100 used in an embodiment of the present application.
- the wireless communication system 100 may include a network device 110 and a terminal device 120.
- the network device 110 may be a device that communicates with the terminal device 120.
- the network device 110 may provide communication coverage for a specific geographical area, and may communicate with the terminal device 120 located in the coverage area.
- FIG1 exemplarily shows a network device and two terminals.
- the wireless communication system 100 may include multiple network devices and each network device may include other number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.
- the wireless communication system 100 may further include one or more core network devices, which is not limited in the embodiments of the present application.
- the core network device may include one or more of the following: an access and mobility management function (AMF) entity, a session management function (SMF) entity, a user plane function (UPF) entity, etc.
- AMF access and mobility management function
- SMF session management function
- UPF user plane function
- the AMF entity may also be called an AMF network element or an AMF functional entity.
- the AMF entity may be responsible for access management and mobility management of terminal devices.
- SMF entities can also be called SMF network elements or SMF functional entities.
- SMF entities can be responsible for session management (such as user session establishment), Internet protocol (IP) address allocation and management of terminal devices, etc.
- IP Internet protocol
- UPF entity may also be called UPF network element or UPF functional entity.
- UPF entity may be a functional entity of the user plane, i.e., a user plane gateway.
- UPF entity may be used for packet routing and forwarding, or quality of service (QoS) processing of user plane data.
- User data may be accessed to an external network, such as a data network (DN), through the UPF entity.
- DN data network
- the wireless communication system 100 may also include other network entities such as a network controller, which is not limited in the present embodiment.
- a network controller such as a network controller, which is not limited in the present embodiment.
- the technical solution of the present embodiment can be applied to various communication systems, such as the fifth generation (5G) System or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, etc.
- LTE long term evolution
- FDD frequency division duplex
- TDD time division duplex
- the technical solution provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.
- the terminal device in the embodiment of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.
- the terminal device in the embodiment of the present application may be a device that provides voice and/or data connectivity to a user, and can be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc.
- the terminal device in the embodiment of the present application can be a mobile phone, a tablet computer, a laptop, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc.
- the UE can be used to act as a base station.
- the UE can act as a scheduling entity that provides sidelink signals between UEs in V2X or D2D, etc.
- a cellular phone and a car communicate with each other using a sidelink signal.
- the cellular phone and the smart home device communicate with each other without relaying the communication signal through the base station.
- the network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be referred to as an access network device or a wireless access network device, such as a base station.
- the network device in the embodiment of the present application may refer to a wireless access network (RAN) node (or device) that connects a terminal device to a wireless network.
- RAN wireless access network
- Base station can broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmitting point (TRP), transmitting point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc.
- the base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof.
- the base station may also refer to a communication module, a modem or a chip used to be arranged in the aforementioned device or apparatus.
- the base station may also be a mobile switching center and a device to device D2D, vehicle-to-everything (V2X), a device that performs the base station function in machine-to-machine (M2M) communications, a network side device in a 6G network, and a device that performs the base station function in future communication systems.
- the base station may support networks with the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network equipment.
- Base stations can be fixed or mobile.
- a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station.
- a helicopter or drone can be configured to act as a device that communicates with another base station.
- the network device in the embodiments of the present application may refer to a CU or a DU, or the network device includes a CU and a DU.
- the gNB may also include an AAU.
- the network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and satellites in the air.
- the embodiments of the present application do not limit the scenarios in which the network equipment and terminal equipment are located.
- 5G 3rd Generation Partnership Project
- eMBB enhanced mobile broadband
- URLLC ultra reliable low latency communications
- mMTC massive machine type communications
- the terminal device can establish a connection with the cell and obtain uplink synchronization information by initiating a random access process.
- Random access can include a four-step random access process and a two-step random access process.
- the random access process can also be divided into a contention-based random access (CBRA) process and a non-contention-based random access (CFRA) process.
- CBRA contention-based random access
- CFRA non-contention-based random access
- the contention-based random access process can include a four-step random access process and a two-step random access process
- the non-contention-based random access process can include a four-step random access process and a two-step random access process.
- the four-step random access procedure may include step 1 to step 4.
- step 1 the terminal device sends a random access request to the network device, and the random access request may include a random access preamble.
- the random access request may also be referred to as the first message or message 1 (Msg1) in the random access process.
- step 2 after detecting the random access preamble sent by the terminal device, the network device sends a random access response (RAR) to the terminal device.
- RAR random access response
- the RAR message can also be called the second message or message 2 (Msg2) in the random access process.
- the terminal device sends message 3 (Msg3) to the network device.
- Message 3 can be used to notify the network device of the event that triggers the random access process. For example, if the event is the initial access random process, the terminal device identifier and establishment cause (establishment cause) will be carried in message 3; if the event is radio resource control (RRC) reconstruction, the connected state terminal device identifier and establishment cause will be carried.
- RRC radio resource control
- step 4 the network device sends message 4 (Msg4) to the terminal device.
- Message 4 can be used for conflict resolution, so message 4 can also be called a contention resolution message.
- the two-step random access process may include step 1 and step 2.
- step 1 the terminal device sends a message A (MsgA) to the network device.
- Message A may include message 1 and message 3 in the four-step random access process.
- step 2 the network device sends a message B (MsgB), namely a random access response, to the terminal device, wherein the message B can be used for contention resolution.
- MsgB message B
- the message B can be used for contention resolution.
- Cell handover aims to improve the continuity of services provided by the communication system to the terminal equipment.
- the terminal equipment can move from one cell (also known as the "source cell”) to another cell (also known as the "target cell”).
- source cell also known as the "source cell”
- target cell also known as the "target cell”
- cell handover can be divided into two types: traditional handover mechanism and conditional handover mechanism.
- the source cell may refer to a cell that provides services to the terminal device before the handover
- the target cell may refer to a cell that provides services to the terminal device after the handover.
- a cell may refer to a coverage area of a network device, that is, a cell corresponds to a network device.
- a source cell corresponds to a source network device (eg, a source base station)
- a target cell corresponds to a target network device (eg, a target base station).
- source cell can be replaced by “network equipment to which the source cell belongs” and "target cell” can be replaced by “network equipment to which the target cell belongs”.
- the source cell and the target cell may belong to the same network device (such as a base station), or the source cell and the target cell may belong to different network devices.
- the source network device and the target network device may refer to the same network device. The embodiments of the present application are not limited to this.
- a wireless communication system such as an LTE system or NR system, etc.
- a terminal device that is using network services moves from one cell to another, or due to wireless transmission service load adjustment, activation operation maintenance, equipment failure, etc.
- the system needs to transfer the communication link between the terminal device and the original cell to the new cell, that is, perform a cell switching process.
- This cell switching mechanism can also be called traditional switching.
- step 1 the source network device sends a handover request to the target network device.
- the source network device may trigger a handover based on the L3 measurement result reported by the terminal, and send a handover request to the target cell through the Xn interface.
- step 2 the target network device sends a handover request acknowledgment to the source network device.
- the target network device may accept the handover request from the source network device, and provide the RRC configuration of the target network device as a part of the handover request confirmation to feed back to the source network device.
- step 3 the source network device sends an RRC reconfiguration message to the terminal device.
- the source network device sends an RRC reconfiguration message to the terminal device to instruct the terminal device to initiate a handover process, as well as an RRC configuration message for accessing the target cell.
- step 4 the terminal device sends an RRC reconfiguration complete message to the target network device.
- the terminal device accesses the target cell and sends an RRC configuration completion message to the target cell.
- the terminal device needs to initiate a random access process to the target cell.
- conditional switching is mainly to improve the reliability and robustness of user switching, in order to solve the problem of late switching due to too long switching preparation time or the problem of switching failure caused by a sharp drop in the source cell channel quality during the switching process.
- the core idea of conditional switching is to pre-configure the switching command content to the terminal device in advance. When specific conditions are met, the terminal device can autonomously execute the configuration in the switching command and directly initiate switching access to the target cell that meets the conditions. Since the terminal device no longer triggers measurement reporting when the switching conditions are met, and the terminal device has already obtained the configuration in the switching command in advance, the problem of the measurement reporting and switching command not being correctly received mentioned above is solved.
- Conditional switching can greatly improve the switching success rate.
- the handover process can be divided into three stages: handover preparation, handover execution, and handover completion.
- the following is a brief introduction to the conditional handover process in conjunction with Figure 3.
- the process shown in Figure 3 can be performed by a terminal device, a source network device (i.e., a network device corresponding to a source cell), a target network device (i.e., a network device corresponding to a target cell), other potential target network devices, an AMF, and an UPF(s).
- the source network device can be a source gNB (source gNB).
- the target network device can be a target gNB (target gNB).
- Other potential target network devices can be other potential gNBs (other potential target gNB(s)).
- Phase 1 Switchover preparation (steps 1 to 7)
- step 1 measurement control and reports are performed between the source network device and the terminal device.
- the source network device triggers the terminal device to perform neighboring area measurement, so that the terminal device can measure the neighboring area and report the measurement results to the source network device.
- user data can be transmitted between the terminal device and the source network device.
- User data can be transmitted between the source network device and the UPF.
- the first stage may also include step 0.
- AMF provides mobility control information (mobility control information provided by AMF).
- step 2 the source network device evaluates the measurement results reported by the terminal device and decides whether to trigger a handover (CHO decision).
- step 3 if the source network device decides to trigger a handover, it may send a handover request to the target network device and other candidate target network devices.
- step 4 after the target network device and other candidate target network devices receive the switching request sent by the source network device, they can start admission control and perform wireless resource configuration according to the service information carried by the source network device.
- step 5 the target network device and other candidate target network devices send a handover request acknowledgment message to the source network device.
- the handover request acknowledgment message includes the RRC reconfiguration message of the target network device and other candidate target network devices.
- step 6 after the source network device receives the switching request confirmation message from the target network device and other candidate target network devices, it can send an RRC reconfiguration message (RRC reconfiguration) of the target network device and other candidate target network devices to the terminal device.
- RRC reconfiguration RRC reconfiguration
- step 7 the terminal device sends an RRC reconfiguration completion message to the source network device. At this point, the handover preparation phase is completed.
- step 7a the terminal device evaluates the CHO conditions and performs early status transfer based on the evaluation results. If the CHO conditions are met, the terminal device detaches from the old cell and synchronizes to the new cell.
- step 8 the conditional handover is completed (CHO handover completion).
- Phase 3 Handover completed (steps 8a to 8c)
- step 8a the target network device sends a handover success message to the source network device.
- the source network device may forward the buffered data, the transmitted data packets, the associated sequence number (SN) of the data, etc. to the target network device via SN status transfer (SN status transfer).
- SN status transfer SN status transfer
- step 8c the source network device sends a handover cancel message to the target network device and other candidate target network devices.
- the third stage may also include steps 9 to 12 in Figure 9.2.3.2.1-1 of the conditional switching related section in the protocol, which will not be repeated here for the sake of brevity.
- the switching process in the related technology is triggered by L3 signaling (RRC reconfiguration).
- RRC reconfiguration the R18 mobility topic will support cell switching triggered by L1/L2 signaling, namely LTM.
- the LTM-based cell switching process can be divided into four stages: LTM preparation, advance synchronization, LTM execution, and LTM completion.
- LTM preparation preparation
- advance synchronization advance synchronization
- LTM execution LTM execution
- LTM completion LTM completion
- step 1 the terminal device in the RRC connected state reports a measurement report to the network device.
- the measurement report in this step is based on L3 measurement.
- the network device can determine to initiate the LTM process based on the measurement result and trigger candidate cell preparation.
- step 2 the network device sends an RRC reconfiguration message to the terminal device.
- the network device can send an RRC message (i.e., RRC reconfiguration message) containing the LTM candidate cell configuration to the terminal device, where the number of candidate cells is one or more.
- RRC message i.e., RRC reconfiguration message
- step 3 the terminal device stores the LTM candidate cell configuration and feeds back a reconfiguration completion message (ie, an RRC reconfiguration complete message) to the network device.
- a reconfiguration completion message ie, an RRC reconfiguration complete message
- step 4a the terminal device performs downlink synchronization with the candidate cell.
- step 4b the terminal device performs uplink synchronization with the candidate cell.
- the terminal device Before receiving the LTM cell switching command, the terminal device can perform uplink/downlink synchronization with the candidate cell in advance to reduce the interruption delay of the switching process.
- Phase 3 LTM Execution (Step 5-Step 7)
- step 5 the terminal device performs L1 measurement on each candidate cell and reports the L1 measurement result to the network device.
- step 6 the network device determines the target cell based on the L1 measurement results reported by the terminal device, and instructs the terminal device to switch to the target cell through the media access control element (MAC CE).
- MAC CE media access control element
- step 7 if the terminal device currently does not have a valid timing advance (TA) for the target cell, then after receiving the LTM switching indication, the terminal device initiates a random access process to the target cell.
- TA timing advance
- the mobility topic in R18 mainly discusses LTM triggered by the network side, that is, the terminal device first reports the L1 measurement results of the candidate cell (beam) to the network device, and the network device determines the target cell based on the received L1 measurement results, and sends a cell switching instruction to the terminal device through MAC CE.
- the delay required for reporting the measurement results and sending the cell switching instruction may increase the probability of switching failure.
- LTM triggered by the terminal device, or conditional LTM can be considered in the research of the next protocol version (R19).
- R18LTM supports the terminal equipment to establish uplink synchronization with the candidate cell in advance.
- the uplink synchronization process is triggered by the physical downlink control channel (PDCCH) order sent by the source cell.
- the terminal equipment sends the preamble code to the candidate cell based on the PDCCH order. Unlike the traditional random access process, the terminal equipment does not need to monitor the RAR after completing the preamble code transmission.
- the network equipment sends the TA information of the target cell to the terminal equipment through the LTM cell switching command, which can save the switching interruption delay caused by the terminal equipment obtaining the target cell TA through the random access process after receiving the switching command.
- the source cell determines when and to which candidate cell the terminal device initiates the early uplink synchronization process based on the L1 measurement results reported by the terminal device.
- the terminal device may not need to report the measurement results based on L1.
- conditional LTM may not require the terminal device to report the L1 measurement results of the candidate cell to the network device. In this case, how to achieve early uplink synchronization between the terminal device and the candidate cell is an urgent problem to be solved.
- How to achieve early uplink synchronization between the terminal device and the candidate cell may include, for example, how to trigger the terminal device to establish uplink synchronization with the candidate cell in advance.
- FIG5 is a method for wireless communication provided by an embodiment of the present application to solve the above problem.
- the method shown in FIG. 5 may include step S510 .
- step S510 the first terminal device determines whether to initiate an early uplink synchronization process to the first LTM candidate cell according to a first condition.
- the first LTM candidate cell may be one of the LTM candidate cells configured by the network device for the terminal device.
- the information of the LTM candidate cell may be carried in an RRC message.
- the early uplink synchronization mentioned here may refer to the uplink synchronization process between the terminal device and the LTM candidate cell before determining the target cell.
- the first condition may be associated with one or more of: L1 measurement results of the LTM candidate cell; the location of the terminal device; the first timer; the moving speed of the terminal device; and whether the TA value of the LTM candidate cell is known.
- the terminal device can perform L1 measurement on the candidate cell.
- the first condition can be associated with the L1 measurement result of the LTM candidate cell.
- the L1 measurement result of the LTM candidate cell may include the cell measurement result of the LTM candidate cell, and may also include the beam measurement result of the LTM candidate cell, that is, the first condition can be associated with the cell measurement result and/or beam measurement result of the LTM candidate cell.
- the L1 measurement result of the LTM candidate cell may include the reference signal received power (RSRP) measurement result, that is, the first condition can be associated with the RSRP measurement result of the LTM candidate cell, such as the first condition can be associated with the RSRP measurement result of the cell and/or beam of the candidate cell.
- RSRP reference signal received power
- the scenario in which the terminal device accesses or prepares to access the first LTM candidate cell may change.
- the above-mentioned scenario changes such as changes in the location of the terminal device, may cause the TA acquired by the terminal device to be unsuitable for the scenario in which the terminal device accesses the first LTM candidate cell, or there is no valid TA value for the candidate cell when the terminal device accesses or prepares to access the first LTM candidate cell. Therefore, the first condition may be associated with the scenario in which the terminal device acquires the TA and/or the scenario in which the terminal device accesses the first LTM candidate cell.
- the terminal device may initiate an early uplink synchronization process to the first LTM candidate cell when the TA may not be applicable to the current scenario, or re-trigger the terminal device to perform uplink synchronization with the first LTM candidate cell in advance, thereby helping to avoid the impact of the above-mentioned scenario changes on the TA, and further helping to improve the accuracy of the TA.
- the above-mentioned scene change may include, for example, a change in the location of the terminal device. Therefore, the first condition may be associated with the location of the terminal device. For example, the first condition may be associated with the location change of the terminal device to avoid the influence of the location change of the terminal device on the TA.
- the scene change may be affected by the moving speed of the terminal device. For example, when the moving speed of the terminal device is fast, the scene change is more likely to occur. Therefore, the first condition may be associated with the moving speed of the terminal device.
- the first condition may be associated with the first timer. For example, after a certain period of time has passed since the terminal device acquired the TA of the first LTM candidate cell, the scene in which the terminal device is located may change. Therefore, the first condition is associated with the first timer, which can avoid the impact of the scene change in which the terminal device is located on the TA. At the same time, the first condition is associated with the first timer, which can avoid the impact of various changes in the scene in which the terminal device is located on the TA, and is easy to implement.
- the first condition may be associated with whether the TA value of the LTM candidate cell is known. If the TA value of the LTM candidate cell is known, the terminal device may not initiate an uplink synchronization process to the first LTM candidate cell to save overhead.
- the first condition mentioned above is associated with the location of the terminal device, which may include associating the first condition with the current location of the terminal device and/or the reference location of the terminal device.
- the reference position of the terminal device may be, for example, the position where the terminal device is located when receiving the TA of the LTM candidate cell.
- the reference position of the terminal device may also include the position of the terminal device when executing LTM.
- the terminal device may perform multiple switching in the LTM candidate cell within a certain period of time, that is, the current service cell of the terminal device may be a cell in the LTM candidate cell.
- the TA value of the current service cell can be saved for use when the terminal device returns to the cell again.
- the TA value is obtained when the terminal device executes LTM, or in other words, the TA value corresponds to the position of the terminal device when executing LTM.
- the first condition may include that the position difference between the current position and the reference position is greater than or equal to the first threshold.
- the change in the location of the terminal device may be associated with the change in the signal quality of the terminal device. For example, if the signal quality of the terminal device changes greatly, or the difference between the signal quality of the terminal device at the first location and the signal quality of the terminal device at the second location is large, the location difference between the first location and the second location may be large. Therefore, the first condition may also include that the difference between the signal quality corresponding to the current location of the terminal device and the signal quality corresponding to the reference location is greater than or equal to the second threshold.
- the above-mentioned signal quality can be characterized by, for example, RSRP measurement results. Since the change in the position of the terminal device may cause a change in the signal quality of the current serving cell, it may also cause a change in the signal quality of the LTM candidate cell. Therefore, the above-mentioned signal quality can be determined based on the RSRP of the LTM candidate cell measured by the terminal device, and/or the RSRP of the serving cell.
- the first condition may, for example, include that the difference between the RSRP of the serving cell corresponding to the current position of the terminal device and the RSRP of the serving cell corresponding to the reference position is greater than or equal to a second threshold; and/or the first condition may include that the difference between the RSRP of the LTM candidate cell corresponding to the current position of the terminal device and the RSRP of the LTM candidate cell corresponding to the reference position is greater than or equal to the second threshold.
- the terminal device Since the terminal device usually measures the signal quality, such as RSRP, during operation, the judgment of the first condition can reuse the existing signal quality measurement results, thereby helping to reduce the overhead of the terminal device.
- the signal quality such as RSRP
- the first condition mentioned above is associated with the first timer, which may include the first condition being associated with the first timer and the moment when the terminal device receives the TA value of the LTM candidate cell.
- the start time of the first timer is associated with the moment when the terminal device receives the TA value of the LTM candidate cell.
- the first timer may be started when the terminal device receives the TA value of the LTM candidate cell.
- the first condition may include that the first duration is greater than or equal to the timing duration of the first timer.
- the first duration is determined based on the time difference between the moment when the terminal device receives the TA value of the LTM candidate cell and the current moment.
- the first duration is the time difference between the moment when the terminal device receives the TA value of the LTM candidate cell and the current moment. That is, when the first timer times out, or after the timeout, the terminal device initiates an early uplink synchronization process to the LTM candidate cell.
- the first condition being associated with a moving speed of the terminal device may include the first condition being associated with a moving speed of the terminal device after receiving the TA value of the LTM candidate cell.
- the first condition may include that the moving speed of the terminal device after receiving the TA value of the LTM candidate cell is greater than or equal to the third threshold.
- the moving speed mentioned here may be the average moving speed of the terminal device, or it may be the instantaneous moving speed of the terminal device.
- the threshold corresponding to the instantaneous moving speed of the terminal device may be greater than or equal to the threshold corresponding to the average moving speed.
- the first condition may be associated with the L1 measurement result of the LTM candidate cell.
- the first condition may include that the L1 measurement result of the terminal device on the LTM candidate cell is greater than or equal to the fifth threshold. It may include the cell measurement results of the candidate cell, and may also include the beam measurement results of the candidate cell. Therefore, the first condition may include that the cell measurement result of the terminal device for the LTM candidate cell is greater than or equal to the fifth threshold, and/or the beam measurement result of the terminal device for the LTM candidate cell is greater than or equal to the fifth threshold.
- the beam measurement results mentioned here may include the measurement results of at least N (N is an integer greater than or equal to 1) beams, for example, N is 1.
- the above-mentioned L1 measurement results may include, for example, RSRP measurement results.
- the first condition may be pre-configured or determined based on first configuration information sent by the network device, such as an RRC configuration message. That is, in some embodiments, the network device may send first configuration information to the first terminal device, and the first configuration information may be used to determine the first condition.
- the first condition is associated with whether the TA value of the LTM candidate cell is known, and the first configuration information can be used to indicate whether the TA value of the LTM candidate cell is known.
- the first configuration information can include or indicates the TA value of the LTM candidate cell, it can indicate that the TA value of the LTM candidate cell is known; if the first configuration information does not indicate the TA value of the LTM candidate cell, it can indicate that the TA value of the LTM candidate cell is unknown.
- the first configuration information can include the first type of configuration information and/or the second type of configuration information to indicate two situations in which the TA value of the LTM candidate cell may be known.
- the above-mentioned first type of configuration information can be used to indicate the relationship between the TA of the first cell and the second cell; wherein: the first cell and the second cell are both LTM candidate cells of the first terminal device; or, the first cell is the service cell of the first terminal device, and the second cell is the LTM candidate cell of the first terminal device.
- the first type of configuration information can be used to indicate the relationship between the TA of the LTM candidate cell and other cells, and the other cells can be either service cells or LTM candidate cells.
- the relationship of the TA between the first cell and the second cell may include one or more of the following: whether the first cell and the second cell belong to the same timing advance group (TAG); and the offset of the TA between the first cell and the second cell.
- TAG timing advance group
- the TA values of the first cell and the second cell are the same. At this time, it can be indicated by configuring the association relationship between the first cell and the second cell, such as using the same identifier to indicate that the first cell and the second cell belong to the same TAG group, or it can be indicated by the TA offset between the first cell and the second cell, such as the offset is 0, which is flexible to use.
- the TA value of the LTM candidate cell is known.
- the second type of configuration information may be used to indicate that the TA value of the LTM candidate cell is 0. If the first configuration information includes the second type of configuration information, the TA value of the LTM candidate cell is known.
- the terminal device may not initiate an early uplink synchronization process with the LTM candidate cell, thereby helping to save the terminal device's overhead.
- the terminal device can determine whether to initiate an early uplink synchronization process to the first LTM candidate cell based on other conditions in the first condition mentioned above.
- the first condition may be pre-configured, or may be determined based on the first configuration information sent by the network device, such as an RRC configuration message.
- the first configuration information may include the first threshold and/or the second threshold.
- the first configuration information may include the first timer.
- the first configuration information may include the start condition and the timing duration of the first timer.
- the first configuration information may include the third threshold.
- the first configuration information may include the type of mobility of the terminal device corresponding to the third threshold, such as the average moving speed and/or the instantaneous moving speed.
- the first configuration information may include the fifth threshold.
- the first configuration information may include the type of L1 measurement result corresponding to the fifth threshold, such as the cell measurement result and/or the beam measurement result.
- the first configuration information may include the parameter corresponding to the L1 measurement result corresponding to the fifth threshold, such as RSRP.
- the first configuration information may include the configuration information of the first type, and/or the configuration information of the second type.
- the above-mentioned multiple conditions for the terminal device to determine whether to initiate an early uplink synchronization process to the first LTM candidate cell can be used separately or in combination with each other. For example, if the location change of the terminal device satisfies the first condition, it can be used in combination with whether the L1 measurement result of the LTM candidate cell satisfies the first condition. That is to say, if the location change of the terminal device satisfies the first condition, it is also necessary to determine whether the L1 measurement result of the first LTM candidate cell satisfies the first condition before determining whether to initiate an early uplink synchronization process to the first LTM candidate cell.
- the terminal device initiates an early uplink synchronization process to the first LTM candidate cell.
- the terminal device can also determine whether the TA value of the first LTM candidate cell is known based on the first configuration information, thereby determining whether to initiate an early uplink synchronization process to the first LTM candidate cell.
- the first configuration information may include one or more configuration information, that is, the multiple conditions included in the above-mentioned first condition may be determined based on the same configuration information or based on different configuration information.
- the terminal device can initiate an early uplink synchronization process with the LTM candidate cell; thereby helping the terminal device to not report the L1 measurement result, or the network device is not triggered.
- the early uplink synchronization process between the terminal equipment and the LTM candidate cell is realized.
- the terminal device can select the first LTM candidate cell based on certain rules. For example, multiple LTM candidate cells of the first terminal device meet the first condition, and the first LTM candidate cell is determined from the multiple LTM candidate cells based on one or more of the following: L1 measurement results of multiple LTM candidate cells; and whether multiple LTM candidate cells are configured with terminal device-exclusive CFRA resources.
- the terminal device can give priority to a candidate cell that is more likely to become the target cell of the terminal device. For example, the terminal device can give priority to a candidate cell with the best L1 measurement result, or a candidate cell with a better L1 measurement result. If the third cell and the fourth cell in the LTM candidate cells both meet the first condition, and the RSRP measurement result of the fourth cell is greater than the RSRP measurement result of the third cell, the terminal device can select the fourth cell as the first LTM candidate cell.
- the terminal device may give priority to the candidate cell configured with CFRA resources exclusive to the terminal device, thereby helping to increase the probability of successful early uplink synchronization between the terminal device and the LTM candidate cell.
- the above LTM may be a conditional LTM. That is, the first terminal device determines whether to initiate an early uplink synchronization process to the first LTM candidate cell according to the first condition, which may include during the conditional LTM process or before executing the conditional LTM process, the first terminal device determines whether to initiate an early uplink synchronization process to the first LTM candidate cell according to the first condition.
- the first configuration information may also include one or more of the following: at least one candidate cell configuration, a measurement configuration, and a first resource configuration.
- the candidate cell configuration may include associating a candidate cell index and an execution condition with each candidate cell configuration; the measurement configuration may be used by the terminal device to perform L1 measurement related to the candidate cell, for example, the measurement configuration includes frequency configuration, synchronization signal block measurement timing configuration (SS/PBCH block measurement timing configuration, SMTC), filtering coefficients, etc.; the first resource configuration may include resource configuration for early uplink synchronization process, such as downlink reference information, uplink reference signal (for example, sounding reference signal (SRS)), physical uplink control channel (physical uplink control channel, PUCCH) resources, physical uplink shared channel (physical uplink shared channel, PUSCH) resources, and random access resources.
- uplink reference signal for example, sounding reference signal (SRS)
- PUCCH physical uplink control channel
- PUSCH physical uplink shared channel
- How to achieve early uplink synchronization between the terminal device and the candidate cell may include, for example, how to determine the resources used by the terminal device to establish uplink synchronization with the candidate cell in advance.
- Figure 6 is a flow chart of a method for wireless communication provided by another embodiment of the present application to solve the above problem.
- the method shown in Figure 6 involves a first terminal device and a network device, and the method provided by the embodiment of the present application is introduced from the perspective of the interaction between the first terminal device and the network device.
- the method shown in Figure 6 may include step S610.
- step S610 the first terminal device sends a random access request to the network device, or the network device receives the random access request from the first terminal device.
- the random access request is used to perform uplink synchronization with the LTM candidate cell in advance, and the random access request is associated with the first random access resource, or the first random access resource can be used to send the random access request.
- the first random access resource can be one of the following: CFRA resource; two-step CBRA resource; and four-step CBRA resource.
- the early uplink synchronization process between the first terminal device and the first LTM candidate cell requires the first terminal device to establish early uplink synchronization with the first LTM candidate cell while maintaining connection with the current serving cell.
- the first terminal device may not be able to obtain some competition-related information from the first LTM candidate cell, such as conflict resolution information. Based on this, the first terminal device can give priority to using CFRA resources for early uplink synchronization to improve the reliability of the early uplink synchronization process.
- the first CFRA resource has a higher priority than the first CBRA resource.
- the terminal device preferentially uses the CFRA resource for early uplink synchronization.
- the first CBRA resource is used when the first CFRA resource is unavailable. That is, if the terminal device is configured with the CFRA resource and the CBRA resource, and the CFRA resource is unavailable, the terminal device uses the CBRA resource for early uplink synchronization.
- the unavailability of the first CFRA resource may, for example, refer to a poor beam measurement result of the LTM candidate cell of the first terminal device, such as a measurement result of the SSB associated with the CFRA resource being less than or equal to a preset threshold. In this case, not using the CFRA resource for early uplink synchronization helps avoid uplink synchronization failure.
- the first terminal device may determine whether to use CBRA resources for early uplink synchronization based on an indication from the network device. For example, the first terminal device may receive first indication information sent by the network device, and the first indication information may be used to indicate whether the first terminal device is allowed to initiate an early uplink synchronization process based on CBRA.
- the method shown in FIG6 may further include step S620.
- the terminal device may The first request is to obtain resources for early uplink synchronization.
- step S620 the first terminal device sends a first request to the network device, or the network device receives the first request sent by the first terminal device.
- the above-mentioned first request can be used to request the network device to allocate resources for the early uplink synchronization process, such as random access channel (RACH) resources or terminal device-specific CFRA resources.
- RACH random access channel
- CFRA terminal device-specific CFRA resources.
- the first request is triggered when a second condition is not met, and the second condition is associated with one or more of the following: first resource configuration information sent by the network device; and a beam measurement result of the LTM candidate cell of the first terminal device.
- the second condition may include that the first resource configuration information includes resources for the first terminal device to perform an early uplink synchronization process. That is, if the first resource configuration information does not include resources for the first terminal device to perform an early uplink synchronization process, the first terminal device may send the above-mentioned first request to the network device. In some cases, the first terminal device is only allowed to initiate an early uplink synchronization process based on CFRA to improve the reliability of the early uplink synchronization process. Therefore, the second condition may, for example, include that the first resource configuration information includes terminal device-exclusive CFRA resources. That is, if the first resource configuration information does not include terminal device-exclusive CFRA resources, the first terminal device may send the above-mentioned first request to the network device.
- the first terminal device may determine whether to use the resources for early uplink synchronization based on the beam measurement result of the LTM candidate cell of the first terminal device, thereby helping to improve the reliability of the early uplink synchronization result.
- the second condition may include that the first resource configuration information includes resources used by the first terminal device for early uplink synchronization, and the measurement result of one or more SSBs is greater than or equal to a fourth threshold. The one or more SSBs are associated with the resources used by the first terminal device for early uplink synchronization included in the first resource configuration information.
- the first terminal device is only allowed to initiate an early uplink synchronization process based on CFRA
- the second condition may include, for example, that the first resource configuration information includes a terminal device-specific CFRA resource, and the measurement result of one or more SSBs is greater than or equal to a fourth threshold.
- the one or more SSBs are associated with the terminal device-specific CFRA resource included in the first resource configuration information.
- whether the first terminal device is allowed to send the first request to the network device, or whether the first terminal device is allowed to send the first request to the network device without satisfying the second condition can be determined based on an indication of the network device. In other words, whether the first terminal device is allowed to send the first request to the network device, or whether the first terminal device is allowed to send the first request to the network device without satisfying the second condition, can be determined based on an indication of the network device.
- the first request may include one or more of the following information: an index of the LTM candidate cell; an SSB index; indication information of a non-supplimentary uplink (NUL, i.e., normal uplink) or a supplementary uplink (SUL); measurement results of some or all beams of the LTM candidate cell; and cell measurement results of the LTM candidate cell.
- NUL non-supplimentary uplink
- SUL supplementary uplink
- the network device may allocate RACH resources for early uplink synchronization to the terminal device through the PDCCH order. For example, the network device may allocate RACH resources for early uplink synchronization to the terminal device through the PDCCH order in response to the first request.
- the first random access resource can be the CFRA resource exclusive to a terminal device in the first resource configuration information sent by the network device.
- the first random access resource can be a resource with better quality or better measurement results (such as the measurement results of the signal associated with the terminal device-specific CFRA resource) among the terminal device-specific CFRA resources, or the first random access resource can be any one of the terminal device-specific CFRA resources (that is, the resource can be randomly selected).
- the above-mentioned terminal device-specific CFRA resource is associated with one or more SSBs, if the measurement result of the first SSB among the one or more SSBs is greater than or equal to the fourth threshold, the first random access resource is the terminal device-specific CFRA resource associated with the first SSB; if the measurement results of one or more SSBs are all less than the fourth threshold, the first random access resource is the terminal device-specific CFRA resource associated with the second SSB among the one or more SSBs, and the second SSB is randomly selected by the first terminal device from the one or more SSBs.
- the early uplink synchronization process between the first terminal device and the LTM candidate cell is stopped.
- the third condition may include one or more of the following: the channel quality of the LTM candidate cell does not meet the triggering condition of the early uplink synchronization process; the CFRA resources based on the early uplink synchronization process are unavailable; there are other LTM candidate cells with L1 measurement results better than the LTM candidate cell; and an event that triggers random access to the serving cell.
- the triggering condition of the above-mentioned early uplink synchronization process may be the first condition mentioned above.
- the third condition may include that the cell measurement result and/or beam measurement result of the LTM candidate cell does not meet the fifth threshold.
- the cell measurement result and/or beam measurement result mentioned here may refer to the RSRP measurement result.
- the CFRA resources on which the above-mentioned early uplink synchronization process is based are unavailable, which may include that the measurement results of one or more SSBs associated with the terminal device's exclusive CFRA resources are all less than the fourth threshold; or the measurement results of one or more SSBs associated with the terminal device's exclusive CFRA resources are all less than the fourth threshold and the first terminal device is only allowed to initiate an early uplink synchronization process based on CFRA resources.
- the random access process can be performed with the serving cell first. For example, when an event that triggers random access to the serving cell is met, the first terminal device preferentially initiates a random access process with the serving cell, that is, the early uplink synchronization process between the first terminal device and the LTM candidate cell is stopped.
- the random access process may include a two-step random access process and a four-step random access process.
- the payload of the message A sent by the first terminal device includes one or more of the following information: the cell radio network temporary identifier (C-RNTI) configured by the LTM candidate cell for the first terminal device; the identifier of the serving cell; the identifier of the serving DU; and the identifier of the serving CU.
- C-RNTI cell radio network temporary identifier
- the message 3 sent by the first terminal device includes one or more of the following information: the C-RNTI configured by the LTM candidate cell for the first terminal device; the identifier of the serving cell; the identifier of the serving DU; and the identifier of the serving CU.
- the above-mentioned SSB measurement result may refer to, for example, a synchronization signal reference signal received power (SS-RSRP) measurement result (or may be referred to as the SS-RSRP measurement result of the SSB).
- the SS-RSRP measurement result of the SSB may refer to the average power of the synchronization signal in each resource element (RE) (or referred to as a resource unit).
- the resources (i.e., the first random resources) used to initiate early uplink synchronization can be flexibly determined based on various situations of the terminal device and the LTM candidate cell, which helps the terminal device to achieve early uplink synchronization between the terminal device and the LTM candidate cell without reporting the L1 measurement results.
- Fig. 7 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application.
- the terminal device 700 may include a determining unit 710.
- the determination unit 710 is used to determine whether to initiate an early uplink synchronization process to a first LTM candidate cell according to a first condition; wherein the first condition is associated with one or more of the following: an L1 measurement result of the LTM candidate cell; the location of the terminal device; a first timer; a moving speed of the terminal device; and whether the TA value of the LTM candidate cell is known.
- the first condition is associated with the location of the terminal device, including: the first condition is associated with the current location of the terminal device and/or the reference location of the terminal device.
- the reference location is one of the following: the location where the terminal device is located when receiving the TA of the LTM candidate cell; and the location where the terminal device is located when executing LTM.
- the first condition includes one or more of the following: the position difference between the current position and the reference position is greater than or equal to a first threshold; and the difference between the signal quality corresponding to the current position and the signal quality corresponding to the reference position is greater than or equal to a second threshold.
- the signal quality is determined based on the RSRP of the LTM candidate cell measured by the terminal device and/or the RSRP of the serving cell.
- the first condition is associated with the first timer, including: the first condition is associated with the first timer and the moment when the terminal device receives the TA value of the LTM candidate cell.
- the first condition includes: a first duration is greater than or equal to a timing duration of the first timer; wherein the first duration is determined based on the time difference between the moment when the terminal device receives the TA value of the LTM candidate cell and the current moment.
- the first condition is associated with a moving speed of the terminal device, including: the first condition is associated with a moving speed of the terminal device after receiving a TA value of the LTM candidate cell.
- the first condition includes: the moving speed or average moving speed of the terminal device after receiving the TA value of the LTM candidate cell is greater than or equal to a third threshold.
- the first condition is determined based on first configuration information sent by the network device.
- the first configuration information includes a first type of configuration information, and the first type of configuration information is used to indicate the TA relationship between the first cell and the second cell; wherein: the first cell and the second cell are both LTM candidate cells for the first terminal device; or, the first cell is the service cell of the first terminal device, and the second cell is the LTM candidate cell for the first terminal device.
- the relationship of the TA between the first cell and the second cell includes one or more of the following: whether the first cell and the second cell belong to the same TAG; and the offset of the TA between the first cell and the second cell.
- the TA value of the first cell is If it is known, then the TA value of the LTM candidate cell is known.
- the first configuration information includes a second type of configuration information, and the second type of configuration information is used to indicate that the TA value of the LTM candidate cell is 0.
- the first configuration information is carried in an RRC configuration message.
- multiple LTM candidate cells of the first terminal device meet the first condition, and the first LTM candidate cell is determined from the multiple LTM candidate cells based on one or more of the following: L1 measurement results of the multiple LTM candidate cells; and whether the multiple LTM candidate cells are configured with terminal device-exclusive CFRA resources.
- the first LTM candidate cell is the LTM candidate cell with the best L1 measurement result among the multiple LTM candidate cells; or, the first LTM candidate cell is the LTM candidate cell among the multiple LTM candidate cells that is configured with terminal device-exclusive CFRA resources.
- the determining unit is used to: in a conditional LTM process, determine whether to initiate an early uplink synchronization process to the first LTM candidate cell according to the first condition.
- Fig. 8 is a schematic diagram of the structure of another terminal device provided in an embodiment of the present application.
- the terminal device 800 may include a first sending unit 810.
- the first sending unit 810 is used to send a random access request to a network device, where the random access request is used to perform uplink synchronization with an LTM candidate cell in advance, and the random access request is associated with a first random access resource, where the first random access resource is one of the following: a CFRA resource; a two-step CBRA resource; and a four-step CBRA resource.
- the first CFRA resource if the network device configures a first CFRA resource and a first CBRA resource for the first terminal device, the first CFRA resource has a higher priority than the first CBRA resource; or, if the network device configures a first CFRA resource and a first CBRA resource for the first terminal device, the first CBRA resource is used if the first CFRA resource is not available.
- the device further includes: a receiving unit, configured to receive first indication information sent by the network device, wherein the first indication information is used to indicate whether the first terminal device is allowed to initiate an early uplink synchronization process based on CBRA.
- the device further includes: a second sending unit, configured to send a first request to the network device, wherein the first request is configured to request the network device to allocate RACH resources for an early uplink synchronization process or terminal device-specific CFRA resources.
- a second sending unit configured to send a first request to the network device, wherein the first request is configured to request the network device to allocate RACH resources for an early uplink synchronization process or terminal device-specific CFRA resources.
- the first request is triggered when a second condition is not met, and the second condition is associated with one or more of the following: first resource configuration information sent by the network device; and a beam measurement result of the LTM candidate cell of the first terminal device.
- the second condition includes: the first resource configuration information includes a terminal device-specific CFRA resource; and
- the measurement results of one or more SSBs are greater than or equal to a fourth threshold; wherein the one or more SSBs are associated with the terminal device-specific CFRA resources included in the first resource configuration information.
- the first request includes one or more of the following information: an index of the LTM candidate cell; an SSB index; indication information of NUL or SUL; measurement results of some or all beams of the LTM candidate cell; and cell measurement results of the LTM candidate cell.
- the first random access resource is a terminal device-specific CFRA resource in the first resource configuration information sent by the network device.
- the first resource configuration information includes a terminal device-specific CFRA resource, the terminal device-specific CFRA resource is associated with one or more SSBs, a measurement result of a first SSB among the one or more SSBs is greater than or equal to a fourth threshold, and the first random access resource is a terminal device-specific CFRA resource associated with the first SSB; or, the first resource configuration information includes a terminal device-specific CFRA resource, the terminal device-specific CFRA resource is associated with one or more SSBs, and the measurement results of the one or more SSBs are all less than a fourth threshold, the first random access resource is a terminal device-specific CFRA resource associated with a second SSB among the one or more SSBs, and the second SSB is randomly selected by the first terminal device from the one or more SSBs.
- the first terminal device is only allowed to initiate an early uplink synchronization process based on CFRA.
- the third condition includes one or more of the following: the channel quality of the LTM candidate cell does not meet the triggering conditions of the early uplink synchronization process; the CFRA resources on which the early uplink synchronization process is based are unavailable; there are other LTM candidate cells whose L1 measurement results are better than the LTM candidate cell; and an event that triggers random access to the serving cell is met.
- the payload of the message A sent by the first terminal device includes one or more of the following information: the C-RNTI configured for the first terminal device by the LTM candidate cell; the identifier of the serving cell; the identifier of the serving DU; and the identifier of the serving CU.
- the message 3 sent by the first terminal device includes one or more of the following information: the LTM candidate cell is a C-RNTI configured for the first terminal device; the service The identity of the cell; the identity of the serving DU; and the identity of the serving CU.
- Fig. 9 is a schematic diagram of the structure of a network device provided in an embodiment of the present application.
- the network device 900 may include a sending unit 910.
- a sending unit 910 is used to send first configuration information to a first terminal device, wherein the first configuration information is used to determine a first condition, and the first condition is used to determine whether to initiate an early uplink synchronization process to a first LTM candidate cell; wherein the first condition is associated with one or more of the following: an L1 measurement result of the LTM candidate cell; the location of the terminal device; a first timer; a moving speed of the terminal device; and whether the TA value of the LTM candidate cell is known.
- the first condition is associated with the location of the terminal device, including: the first condition is associated with the current location of the terminal device and/or the reference location of the terminal device.
- the reference location is one of the following: the location where the terminal device is located when receiving the TA of the LTM candidate cell; and the location where the terminal device is located when executing LTM.
- the first condition includes one or more of the following: the position difference between the current position and the reference position is greater than or equal to a first threshold; and the difference between the signal quality corresponding to the current position and the signal quality corresponding to the reference position is greater than or equal to a second threshold.
- the signal quality is determined based on the RSRP of the LTM candidate cell measured by the terminal device and/or the RSRP of the serving cell.
- the first condition is associated with the first timer, including: the first condition is associated with the first timer and the moment when the terminal device receives the TA value of the LTM candidate cell.
- the first condition includes: a first duration is greater than or equal to a timing duration of the first timer; wherein the first duration is determined based on the time difference between the moment when the terminal device receives the TA value of the LTM candidate cell and the current moment.
- the first condition is associated with a moving speed of the terminal device, including: the first condition is associated with a moving speed of the terminal device after receiving a TA value of the LTM candidate cell.
- the first condition includes: the moving speed or average moving speed of the terminal device after receiving the TA value of the LTM candidate cell is greater than or equal to a third threshold.
- the first configuration information includes a first type of configuration information, and the first type of configuration information is used to indicate the TA relationship between the first cell and the second cell; wherein: the first cell and the second cell are both LTM candidate cells for the first terminal device; or, the first cell is the service cell of the first terminal device, and the second cell is the LTM candidate cell for the first terminal device.
- the relationship of the TA between the first cell and the second cell includes one or more of the following: whether the first cell and the second cell belong to the same TAG; and the offset of the TA between the first cell and the second cell.
- the TA value of the LTM candidate cell is known.
- the first configuration information includes a second type of configuration information, and the second type of configuration information is used to indicate that the TA value of the LTM candidate cell is 0.
- the first configuration information is carried in an RRC configuration message.
- multiple LTM candidate cells of the first terminal device meet the first condition, and the first LTM candidate cell is determined from the multiple LTM candidate cells based on one or more of the following: L1 measurement results of the multiple LTM candidate cells; and whether the multiple LTM candidate cells are configured with terminal device-exclusive CFRA resources.
- the first LTM candidate cell is the LTM candidate cell with the best L1 measurement result among the multiple LTM candidate cells; or, the first LTM candidate cell is the LTM candidate cell among the multiple LTM candidate cells that is configured with terminal device-exclusive CFRA resources.
- the network device sends the first configuration information to the first terminal device, including: in a conditional LTM process, the network device sends the first configuration information to the first terminal device.
- Fig. 10 is a schematic diagram of the structure of a network device provided in an embodiment of the present application.
- the network device 1000 may include a first receiving unit 1010 .
- the first receiving unit 1010 is used to receive a random access request sent by a first terminal device, where the random access request is used to perform uplink synchronization with an LTM candidate cell in advance, and the random access request is associated with a first random access resource, which is one of the following: a CFRA resource; a two-step CBRA resource; and a four-step CBRA resource.
- the first CFRA resource if the network device configures a first CFRA resource and a first CBRA resource for the first terminal device, the first CFRA resource has a higher priority than the first CBRA resource; or, if the network device configures a first CFRA resource and a first CBRA resource for the first terminal device, the first CBRA resource is used if the first CFRA resource is not available.
- the device further includes: a sending unit, configured to send first indication information to the first terminal device, The first indication information is used to indicate whether the first terminal device is allowed to initiate an early uplink synchronization process based on CBRA.
- the device further includes: a second receiving unit, configured to receive a first request sent by the first terminal device, wherein the first request is configured to request the network device to allocate RACH resources for an early uplink synchronization process or terminal device-specific CFRA resources.
- the first request is triggered when a second condition is not met, and the second condition is associated with one or more of the following: first resource configuration information sent by the network device; and a beam measurement result of the LTM candidate cell of the first terminal device.
- the second condition includes: the first resource configuration information includes a CFRA resource dedicated to the terminal device; and the measurement results of one or more SSBs are greater than or equal to a fourth threshold; wherein the one or more SSBs are associated with the CFRA resources included in the first resource configuration information.
- the first request includes one or more of the following information: an index of the LTM candidate cell; an SSB index; indication information of NUL or SUL; measurement results of some or all beams of the LTM candidate cell; and cell measurement results of the LTM candidate cell.
- the first random access resource is a terminal device-specific CFRA resource in the first resource configuration information sent by the network device.
- the first resource configuration information includes a terminal device-specific CFRA resource, the terminal device-specific CFRA resource is associated with one or more SSBs, a measurement result of a first SSB among the one or more SSBs is greater than or equal to a fourth threshold, and the first random access resource is a terminal device-specific CFRA resource associated with the first SSB; or, the first resource configuration information includes a terminal device-specific CFRA resource, the terminal device-specific CFRA resource is associated with one or more SSBs, and the measurement results of the one or more SSBs are all less than a fourth threshold, the first random access resource is a terminal device-specific CFRA resource associated with a second SSB among the one or more SSBs, and the second SSB is randomly selected by the first terminal device from the one or more SSBs.
- the first terminal device is only allowed to initiate an early uplink synchronization process based on CFRA.
- the third condition includes one or more of the following: the channel quality of the LTM candidate cell does not meet the triggering conditions of the early uplink synchronization process; the CFRA resources on which the early uplink synchronization process is based are unavailable; there are other LTM candidate cells whose L1 measurement results are better than the LTM candidate cell; and an event that triggers random access to the serving cell is met.
- the payload of the message A sent by the first terminal device includes one or more of the following information: the C-RNTI allocated by the LTM candidate cell to the first terminal device; the identifier of the serving cell; the identifier of the serving DU; and the identifier of the serving CU.
- the message 3 sent by the first terminal device includes one or more of the following information: the C-RNTI allocated by the LTM candidate cell to the first terminal device; the identifier of the serving cell; the identifier of the serving DU; and the identifier of the serving CU.
- the sending unit and the receiving unit described above may be a transceiver 1130.
- the terminal device 700, the terminal device 800, the network device 900, and the network device 1000 may further include a processor 1110 and a memory 1120, as specifically shown in FIG. 11 .
- FIG11 is a schematic structural diagram of a communication device according to an embodiment of the present application.
- the dotted lines in FIG11 indicate that the unit or module is optional.
- the device 1100 may be used to implement the method described in the above method embodiment.
- the device 1100 may be a chip or a terminal device or a network device.
- the device 1100 may include one or more processors 1110.
- the processor 1110 may support the device 1100 to implement the method described in the above method embodiment.
- the processor 1110 may be a general-purpose processor or a special-purpose processor.
- the processor may be a central processing unit (CPU).
- the processor may also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
- DSP digital signal processor
- ASIC application specific integrated circuits
- FPGA field programmable gate arrays
- a general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.
- the apparatus 1100 may further include one or more memories 1120.
- the memory 1120 stores a program, which can be executed by the processor 1110, so that the processor 1110 executes the method described in the above method embodiment.
- the memory 1120 may be independent of the processor 1110 or integrated in the processor 1110.
- the apparatus 1100 may further include a transceiver 1130.
- the processor 1110 may communicate with other devices or chips through the transceiver 1130.
- the processor 1110 may transmit and receive data with other devices or chips through the transceiver 1130.
- the present application also provides a computer-readable storage medium for storing a program.
- the computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal device or network device in each embodiment of the present application.
- the present application also provides a computer program product.
- the computer program product includes a program.
- the computer program product can be applied to the terminal or network device provided in the present application, and the program enables the computer to execute the instructions of the terminal in each embodiment of the present application. Or a method performed by a network device.
- the embodiment of the present application also provides a computer program.
- the computer program can be applied to the terminal device or network device provided in the embodiment of the present application, and the computer program enables a computer to execute the method executed by the terminal device or network device in each embodiment of the present application.
- the "indication" mentioned can be a direct indication, an indirect indication, or an indication of an association relationship.
- a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.
- the term “include” may refer to direct inclusion or indirect inclusion.
- the term “include” in the embodiments of the present application may be replaced with “indicates” or “is used to determine”.
- “A includes B” may be replaced with “A indicates B” or "A is used to determine B”.
- B corresponding to A means that B is associated with A, and B can be determined according to A.
- determining B according to A does not mean determining B only according to A, and B can also be determined according to A and/or other information.
- the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship of indication and being indicated, configuration and being configured, etc.
- pre-definition or “pre-configuration” can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit the specific implementation method.
- pre-definition can refer to what is defined in the protocol.
- the “protocol” may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.
- the term "and/or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships.
- a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
- the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.
- the size of the serial numbers of the above-mentioned processes does not mean the order of execution.
- the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.
- the disclosed systems, devices and methods can be implemented in other ways.
- the device embodiments described above are only schematic.
- the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
- Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
- the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
- each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
- the computer program product includes one or more computer instructions.
- the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
- the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
- the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center.
- the computer-readable storage medium may be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated.
- the available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital versatile disk (DVD)), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.
- a magnetic medium e.g., a floppy disk, a hard disk, a magnetic tape
- an optical medium e.g., a digital versatile disk (DVD)
- DVD digital versatile disk
- SSD solid state disk
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Abstract
提供了一种用于无线通信的方法及设备,该方法包括:第一终端设备根据第一条件确定是否向第一LTM候选小区发起提前上行同步过程;其中,所述第一条件与以下中的一种或多种关联:LTM候选小区的L1测量结果;终端设备的位置;第一定时器;终端设备的移动速度;以及所述LTM候选小区的TA值是否已知。本申请实施例中,通过提前上行同步的触发条件(即第一条件),终端设备可以发起与LTM候选小区的提前上行同步过程;从而有助于终端设备在不上报L1测量结果的情况下,或者说网络设备未触发提前上行同步、未指示提前上行同步资源的情况下,实现终端设备与LTM候选小区的提前上行同步过程。
Description
本申请涉及通信技术领域,并且更为具体地涉及一种用于无线通信的方法及设备。
层1/层2触发的移动性(L1/L2-triggered mobility,LTM)支持终端设备与候选小区提前建立上行同步。其中,提前上行同步过程是由源小区基于L1的测量结果触发以及指示的。在未来,终端设备可能不需要上报基于L1的测量结果,这种情况下如何实现终端设备与候选小区之间的提前上行同步是亟待解决的问题。
发明内容
本申请提供一种用于无线通信的方法及设备。下面对本申请涉及的各个方面进行介绍。
第一方面,提供了一种用于无线通信的方法,该方法包括:第一终端设备根据第一条件确定是否向第一LTM候选小区发起提前上行同步过程;其中,所述第一条件与以下中的一种或多种关联:LTM候选小区的L1测量结果;终端设备的位置;第一定时器;终端设备的移动速度;以及所述LTM候选小区的TA值是否已知。
第二方面,提供了一种用于无线通信的方法,该方法包括:第一终端设备向网络设备发送随机接入请求,所述随机接入请求用于与LTM候选小区提前进行上行同步,所述随机接入请求与第一随机接入资源关联,所述第一随机接入资源为以下中的一种:CFRA资源;两步CBRA资源;以及四步CBRA资源。
第三方面,提供一种用于无线通信的方法,该方法包括:网络设备向第一终端设备发送第一配置信息,所述第一配置信息用于确定第一条件,所述第一条件用于确定是否向第一LTM候选小区发起提前上行同步过程;其中,所述第一条件与以下中的一种或多种关联:LTM候选小区的L1测量结果;终端设备的位置;第一定时器;终端设备的移动速度;以及所述LTM候选小区的TA值是否已知。
第四方面,提供一种用于无线通信的方法,该方法包括:网络设备接收第一终端设备发送的随机接入请求,所述随机接入请求用于与LTM候选小区提前进行上行同步,所述随机接入请求与第一随机接入资源关联,所述第一随机接入资源为以下中的一种:CFRA资源;两步CBRA资源;以及四步CBRA资源。
第五方面,提供一种终端设备,所述终端设备为第一终端设备,所述终端设备包括:确定单元,用于根据第一条件确定是否向第一LTM候选小区发起提前上行同步过程;其中,所述第一条件与以下中的一种或多种关联:LTM候选小区的L1测量结果;终端设备的位置;第一定时器;终端设备的移动速度;以及所述LTM候选小区的TA值是否已知。
第六方面,提供一种终端设备,所述终端设备为第一终端设备,所述终端设备包括:第一发送单元,用于向网络设备发送随机接入请求,所述随机接入请求用于与LTM候选小区提前进行上行同步,所述随机接入请求与第一随机接入资源关联,所述第一随机接入资源为以下中的一种:CFRA资源;两步CBRA资源;以及四步CBRA资源。
第七方面,提供一种网络设备,包括:发送单元,用于向第一终端设备发送第一配置信息,所述第一配置信息用于确定第一条件,所述第一条件用于确定是否向第一LTM候选小区发起提前上行同步过程;其中,所述第一条件与以下中的一种或多种关联:LTM候选小区的L1测量结果;终端设备的位置;第一定时器;终端设备的移动速度;以及所述LTM候选小区的TA值是否已知。
第八方面,提供一种网络设备,包括:第一接收单元,用于接收第一终端设备发送的随机接入请求,所述随机接入请求用于与LTM候选小区提前进行上行同步,所述随机接入请求与第一随机接入资源关联,所述第一随机接入资源为以下中的一种:CFRA资源;两步CBRA资源;以及四步CBRA资源。
第九方面,提供一种终端设备,包括处理器、存储器以及通信接口,所述存储器用于存储一个或多个计算机程序,所述处理器用于调用所述存储器中的计算机程序使得所述终端设备执行第一方面或第二方面的方法中的部分或全部步骤。
第十方面,提供一种网络设备,包括处理器、存储器、通信接口,所述存储器用于存储一个或多个计算机程序,所述处理器用于调用所述存储器中的计算机程序使得所述网络设备执行第三方面或第四方面的方法中的部分或全部步骤。
第十一方面,本申请实施例提供了一种通信系统,该系统包括上述的终端设备和/或网络设备。在另一种可能的设计中,该系统还可以包括本申请实施例提供的方案中与该终端设备或网络设备进行交
互的其他设备。
第十二方面,本申请实施例提供了一种计算机可读存储介质,所述计算机可读存储介质存储有计算机程序,所述计算机程序使得终端设备执行上述第一方面或第二方面的方法中的部分或全部步骤。
第十三方面,本申请实施例提供了一种计算机可读存储介质,所述计算机可读存储介质存储有计算机程序,所述计算机程序使得网络设备执行上述第三方面或第四方面的方法中的部分或全部步骤。
第十四方面,本申请实施例提供了一种计算机程序产品,其中,所述计算机程序产品包括存储了计算机程序的非瞬时性计算机可读存储介质,所述计算机程序可操作来使终端设备执行上述第一方面或第二方面的方法中的部分或全部步骤。在一些实现方式中,该计算机程序产品可以为一个软件安装包。
第十五方面,本申请实施例提供了一种计算机程序产品,其中,所述计算机程序产品包括存储了计算机程序的非瞬时性计算机可读存储介质,所述计算机程序可操作来使网络设备执行上述第三方面或第四方面的方法中的部分或全部步骤。在一些实现方式中,该计算机程序产品可以为一个软件安装包。
第十六方面,本申请实施例提供了一种芯片,该芯片包括存储器和处理器,处理器可以从存储器中调用并运行计算机程序,以实现上述第一方面至第四方面中任一方面的方法中所描述的部分或全部步骤。
本申请实施例中,基于提前上行同步的触发条件(即第一条件),终端设备可以发起与LTM候选小区的提前上行同步过程,从而有助于终端设备在不上报L1测量结果的情况下,或者说网络设备未触发提前上行同步、未指示提前上行同步资源的情况下,实现终端设备与LTM候选小区的提前上行同步过程。
图1为本申请实施例应用的无线通信系统示意图。
图2为基于L3测量/信令的小区切换过程的流程示意图。
图3为一种条件切换流程的示意图。
图4为一种基于LTM的小区切换流程的示意图。
图5为本申请一实施例提供的用于无线通信的方法的流程示意图。
图6为本申请另一实施例提供的用于无线通信的方法的流程示意图。
图7为本申请实施例提供的一种终端设备的结构示意图。
图8为本申请实施例提供的另一种终端设备的结构示意图。
图9为本申请实施例提供的一种网络设备的结构示意图。
图10为本申请实施例提供的另一种网络设备的结构示意图。
图11为本申请实施例提供的一种装置的结构示意图。
下面将结合附图,对本申请中的技术方案进行描述。
图1是本申请实施例应用的无线通信系统100。该无线通信系统100可以包括网络设备110和终端设备120。网络设备110可以是与终端设备120通信的设备。网络设备110可以为特定的地理区域提供通信覆盖,并且可以与位于该覆盖区域内的终端设备120进行通信。
图1示例性地示出了一个网络设备和两个终端,可选地,该无线通信系统100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端设备,本申请实施例对此不做限定。
可选地,该无线通信系统100还可以包括一个或多个核心网设备,本申请实施例对此不作限定。示例性地,核心网设备例如可以包括以下一项或多项:接入和移动性管理功能(access and mobility management function,AMF)实体、会话管理功能(session management function,SMF)实体、用户面功能(user plane function,UPF)实体等。
AMF实体,例如也可以称为AMF网元或AMF功能实体。AMF实体可以用于负责终端设备的接入管理和移动性管理等。
SMF实体,例如也可以称为SMF网元或SMF功能实体。SMF实体可以负责会话管理(如用户的会话建立)、终端设备的网际协议(internet protocol,IP)地址分配和管理等。
UPF实体,例如也可以称为UPF网元或UPF功能实体。UPF实体可以是用户面的功能实体,即用户面网关。UPF实体可以用于分组路由和转发、或用户面数据的服务质量(quality of service,QoS)处理等。用户数据可以通过UPF实体接入到外部网络,如数据网络(data network,DN)。
可选地,该无线通信系统100还可以包括网络控制器等其他网络实体,本申请实施例对此不作限定。应理解,本申请实施例的技术方案可以应用于各种通信系统,例如:第五代(5th generation,5G)
系统或新无线(new radio,NR)、长期演进(long term evolution,LTE)系统、LTE频分双工(frequency division duplex,FDD)系统、LTE时分双工(time division duplex,TDD)等。本申请提供的技术方案还可以应用于未来的通信系统,如第六代移动通信系统,又如卫星通信系统,等等。
本申请实施例中的终端设备也可以称为用户设备(user equipment,UE)、接入终端、用户单元、用户站、移动站、移动台(mobile station,MS)、移动终端(mobile terminal,MT)、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。本申请实施例中的终端设备可以是指向用户提供语音和/或数据连通性的设备,可以用于连接人、物和机,例如具有无线连接功能的手持式设备、车载设备等。本申请的实施例中的终端设备可以是手机(mobile phone)、平板电脑(Pad)、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device,MID)、可穿戴设备,虚拟现实(virtual reality,VR)设备、增强现实(augmented reality,AR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等。可选地,UE可以用于充当基站。例如,UE可以充当调度实体,其在V2X或D2D等中的UE之间提供侧行链路信号。比如,蜂窝电话和汽车利用侧行链路信号彼此通信。蜂窝电话和智能家居设备之间通信,而无需通过基站中继通信信号。
本申请实施例中的网络设备可以是用于与终端设备通信的设备,该网络设备也可以称为接入网设备或无线接入网设备,如网络设备可以是基站。本申请实施例中的网络设备可以是指将终端设备接入到无线网络的无线接入网(radio access network,RAN)节点(或设备)。基站可以广义的覆盖如下中的各种名称,或与如下名称进行替换,比如:节点B(NodeB)、演进型基站(evolved NodeB,eNB)、下一代基站(next generation NodeB,gNB)、中继站、接入点、传输点(transmitting and receiving point,TRP)、发射点(transmitting point,TP)、主站MeNB、辅站SeNB、多制式无线(MSR)节点、家庭基站、网络控制器、接入节点、无线节点、接入点(access point,AP)、传输节点、收发节点、基带单元(base band unit,BBU)、射频拉远单元(remote radio unit,RRU)、有源天线单元(active antenna unit,AAU)、射频头(remote radio head,RRH)、中心单元(central unit,CU)、分布式单元(distributed unit,DU)、定位节点等。基站可以是宏基站、微基站、中继节点、施主节点或类似物,或其组合。基站还可以指用于设置于前述设备或装置内的通信模块、调制解调器或芯片。基站还可以是移动交换中心以及设备到设备D2D、车辆外联(vehicle-to-everything,V2X)、机器到机器(machine-to-machine,M2M)通信中承担基站功能的设备、6G网络中的网络侧设备、未来的通信系统中承担基站功能的设备等。基站可以支持相同或不同接入技术的网络。本申请的实施例对网络设备所采用的具体技术和具体设备形态不做限定。
基站可以是固定的,也可以是移动的。例如,直升机或无人机可以被配置成充当移动基站,一个或多个小区可以根据该移动基站的位置移动。在其他示例中,直升机或无人机可以被配置成用作与另一基站通信的设备。
在一些部署中,本申请实施例中的网络设备可以是指CU或者DU,或者,网络设备包括CU和DU。gNB还可以包括AAU。
网络设备和终端设备可以部署在陆地上,包括室内或室外、手持或车载;也可以部署在水面上;还可以部署在空中的飞机、气球和卫星上。本申请实施例中对网络设备和终端设备所处的场景不做限定。
应理解,本申请中的通信设备的全部或部分功能也可以通过在硬件上运行的软件功能来实现,或者通过平台(例如云平台)上实例化的虚拟化功能来实现。
随着人们对速率、延迟、高速移动性、能效的追求以及未来生活中业务的多样性和复杂性,第三代移动通信合作伙伴计划(3rd generation partnership project,3GPP)国际标准组织开始研发5G。5G的主要应用场景可以包括:增强移动超宽带(enhance mobile broadband,eMBB)、低时延高可靠通信(ultra reliable low latency communications,URLLC)和大规模机器类通信(massive machine type communication,mMTC)。
为了便于理解,下文介绍本申请实施例涉及的通信过程。
随机接入过程
终端设备可以通过发起随机接入过程与小区建立连接并获取上行同步信息。随机接入可以包括四步随机接入过程和两步随机接入过程。随机接入过程也可以分为基于竞争的随机接入(contention based random access,CBRA)过程和基于非竞争的随机接入(contention free random access,CFRA)过程。其中,基于竞争的随机接入过程可以包括四步随机接入过程和两步随机接入过程,基于非竞争的随机接入过程可以包括四步随机接入过程和两步随机接入过程。
四步随机接入过程可以包括步骤1至步骤4。
在步骤1,终端设备向网络设备发送随机接入请求,随机接入请求可以包括随机接入前导码(preamble)。随机接入请求又可以称为随机接入过程中的第一消息或消息1(Msg1)。
在步骤2,网络设备在检测到终端设备发送的随机接入前导码后,向终端设备发送随机接入响应(random access response,RAR)。RAR消息又可以称为随机接入过程中的第二消息或消息2(Msg2)。
在步骤3,终端设备向网络设备发送消息3(Msg3),消息3可以用于通知网络设备触发该随机接入过程的事件。示例性地,如果事件是初始接入随机过程,则在消息3中会携带终端设备标识和建立原因(establishment cause);如果事件是无线资源控制(radio resource control,RRC)重建,则会携带连接态终端设备标识和建立原因。
在步骤4,网络设备向终端设备发送消息4(Msg4),消息4可以用于冲突解决,因此,消息4也可以称为竞争解决消息。
为了降低时延开销,引入了两步随机接入。两步步随机接入过程可以包括步骤1和步骤2。
在步骤1,终端设备向网络设备发送消息A(MsgA)。消息A可以包括四步随机接入过程中的消息1和消息3。
在步骤2,网络设备向终端设备发送消息B(MsgB),即随机接入响应。其中,消息B可以用于竞争解决。
小区切换
小区切换(handover,HO)旨在提高通信系统为终端设备提供服务的连续性。在无线通信系统中,终端设备可以从一个小区(又称“源小区”)移动到另一个小区(又称“目标小区”)。通常,小区切换可以分为传统的切换机制和条件切换机制两种。
在本申请实施例中,源小区可以表示切换前为终端设备提供服务的小区。目标小区可以表示切换后为终端设备提供服务的小区。
应理解,小区可以是指网络设备的覆盖区域,即小区与网络设备是对应的。换句话说,在本申请实施例中,源小区对应源网络设备(例如源基站),目标小区对应目标网络设备(例如目标基站)。
还应理解,在本申请实施例中,“源小区”可以替换为“源小区所属的网络设备”,“目标小区”可以替换为“目标小区所属的网络设备”。
还应理解,在本申请实施例中,源小区与目标小区可能属于同一个网络设备(如基站),或者,源小区和目标小区也可能属于不同的网络设备。换句话说,在一些实施例中,源网络设备和目标网络设备可以是指同一个网络设备。本申请实施例对此并不限定。
传统切换
在无线通信系统中(如LTE系统或NR系统等),当正在使用网络服务的终端设备从一个小区移动到另一个小区,或由于无线传输业务负荷量调整、激活操作维护、设备故障等原因,为了保持终端设备的通信的连续性和服务的质量,系统需要将该终端设备与原小区的通信链路转移到新的小区上,即执行小区切换过程。该小区切换机制也可以称为传统切换。
下面结合图2对基于L3测量/信令的小区切换过程进行简单介绍。
在步骤1,源网络设备向目标网络设备发送切换请求(handover request)。
源网络设备可以基于终端上报的L3测量结果触发切换,并通过Xn接口向目标小区发送切换请求。
在步骤2,目标网络设备向源网络设备发送切换请求确认(handover request acknowledge)。
目标网络设备可以接受来自源网络设备的切换请求,并提供目标网络设备的RRC配置作为切换请求确认的一部分反馈给源网络设备。
在步骤3,源网络设备向终端设备发送RRC重配(RRC reconfiguration)消息。
源网络设备向终端设备发送RRC重配消息,以指示终端设备发起切换流程,以及用于接入目标小区的RRC配置消息。
在步骤4,终端设备向目标网络设备发送RRC重配完成(RRC reconfiguration complete)消息。
终端设备接入目标小区,并向目标小区发送RRC配置完成消息。为了与目标小区建立上行同步,终端设备需要向目标小区发起随机接入过程。
条件切换(conditional handover,CHO)
条件切换的目标主要是为了提高用户切换的可靠性及鲁棒性,用以解决在切换过程中由于切换准备时间过长导致切换过晚的问题或者是切换过程中源小区信道质量急剧下降而导致的切换失败的问题。条件切换的核心思想是提前将切换命令内容预配置给终端设备,当特定条件满足时,终端设备就可以自主地执行切换命令中的配置,直接向满足条件的目标小区发起切换接入。由于切换条件满足时终端设备不再触发测量上报,且终端设备已经提前获取了切换命令中的配置,因而解决了前面提到的测量上报和切换命令不能被正确接收的问题。特别是针对高速移动场景或者是在切换带出现信号快速衰落的场景,
条件切换能极大提高切换成功率。
通常切换过程可以分为三个阶段:切换准备、切换执行和切换完成。下面结合图3,对条件切换过程进行简单介绍。图3所示的过程可以由终端设备、源网络设备(即源小区对应的网络设备)、目标网络设备(即目标小区对应的网络设备)、其他备选目标网络设备、AMF以及UPF(s)执行。例如,源网络设备可以为源gNB(source gNB)。目标网络设备可以为目标gNB(target gNB)。其他备选目标网络设备可以为其他备选gNB(other potential target gNB(s))。
第一阶段:切换准备(步骤1至步骤7)
在步骤1,源网络设备与终端设备之间进行测量控制及上报(measurement control and reports)。具体地,源网络设备触发终端设备进行邻区测量,从而终端设备可以对邻区进行测量,并将测量结果上报给源网络设备。
在步骤1之前,终端设备和源网络设备之间可以传输用户数据(user data)。源网络设备和UPF之间可以传输用户数据。
如图3所示,在步骤1之前,第一阶段还可以包括步骤0。步骤0,AMF提供移动控制信息(mobility control information provided by AMF)。
在步骤2,源网络设备对终端设备上报的测量结果进行评估,决定是否触发切换(CHO decision)。
在步骤3,若源网络设备决定触发切换,则可以向目标网络设备以及其他候选目标网络设备发送切换请求(handover request)。
在步骤4,目标网络设备、其他候选目标网络设备接收到源网络设备发送的切换请求后,可以根据源网络设备携带的业务信息开始准入(admission control),并进行无线资源配置。
在步骤5,目标网络设备、其他候选目标网络设备向源网络设备发送切换请求确认消息(handover request acknowledge)。在切换请求确认消息中包含目标网络设备、其他候选目标网络设备的RRC重配消息。
在步骤6,源网络设备接收到目标网络设备、其他候选目标网络设备的切换请求确认消息后,可以向终端设备发送目标网络设备、其他候选目标网络设备的RRC重配消息(RRC reconfiguration)。
在步骤7,终端设备向源网络设备发送RRC重配完成消息。至此,切换准备阶段完成。
第二阶段:切换执行(步骤7a至步骤8)
在步骤7a,终端设备对条件切换的条件进行评估(evaluate the CHO conditions),并基于评估结果提前状态转移(early status transfer)。如果符合条件切换条件,则终端设备离开旧小区,与新小区进行同步(detach from the old cell,synchronize to the new cell)。
在步骤8,条件切换完成(CHO handover completion)。
第三阶段:切换完成(步骤8a至步骤8c)
在步骤8a,目标网络设备向源网络设备发送切换成功(handover success)信息。
在步骤8b,源网络设备可以将缓冲数据、在传数据包、数据的关联序列号(sequence number,SN)等通过SN状态传输(SN status transfer)转发给目标网络设备。
在步骤8c,源网络设备向目标网络设备、其他候选目标网络设备发送切换取消(handover cancel)信息。
在一些实施例中,第三阶段还可以包括协议中条件切换相关章节的图9.2.3.2.1-1中的步骤9至步骤12,为了简洁,此处不再赘述。
LTM
相关技术中的切换过程由L3信令(RRC reconfiguration)触发,为了进一步减小L3切换过程的时延,R18移动性课题将支持基于L1/L2信令触发的小区切换,即LTM。
基于LTM的小区切换过程可以分为LTM准备、提前同步、LTM执行和LTM完成四个阶段。下面结合图4,对基于LTM的小区切换流程进行简单介绍。
第一阶段:LTM准备(步骤1-步骤3)
在步骤1,处于RRC连接态的终端设备向网络设备上报测量报告。
该步骤中的测量报告为基于L3测量的。网络设备可以基于测量结果确定发起LTM过程,并触发候选小区准备。
在步骤2,网络设备向终端设备发送RRC重配消息。
网络设备可以向终端设备发送包含LTM候选小区配置的RRC消息(即RRC reconfiguration消息),其中,候选小区个数为一个或多个。
在步骤3,终端设备存储LTM候选小区配置,并向网络设备反馈重配完成消息(即RRC reconfiguration complete消息)。
第二阶段:提前同步(步骤4a和步骤4b)
在步骤4a,终端设备与候选小区进行下行同步。
在步骤4b,终端设备与候选小区进行上行同步。
在收到LTM小区切换命令前,终端设备可以提前向候选小区做上/下行同步,以缩减切换过程的中断时延。
第三阶段:LTM执行(步骤5-步骤7)
在步骤5,终端设备对各个候选小区执行L1测量,并向网络设备上报L1测量结果。
在步骤6,网络设备基于终端设备上报的L1测量结果确定目标小区,并通过媒体接入控制单元(media access control control element,MAC CE)指示终端设备切换到目标小区。
在步骤7,如果终端设备当前没有目标小区的有效定时提前(timing advance,TA),那么在收到LTM切换指示后,终端设备向目标小区发起随机接入过程。
第四阶段:LTM完成(步骤8)
在步骤8,LTM完成。
R18中移动性课题主要讨论了由网络侧触发的LTM,即终端设备先向网络设备上报对于候选小区(波束)的L1测量结果,网络设备基于接收到的L1测量结果确定目标小区,并通过MAC CE向终端设备发送小区切换指令。测量结果上报以及小区切换指令下发过程所需的时延可能会增加切换失败的概率。为了进一步增强LTM过程的鲁棒性,在下一个协议版本(R19)的研究中可以考虑由终端设备触发的LTM,或者称为条件LTM(conditional LTM)。
R18LTM支持终端设备与候选小区提前建立上行同步,提前上行同步过程由源小区发送的物理下行控制信道(physical downlink control channel,PDCCH)order触发,终端设备基于PDCCH order向候选小区发送前导码。与传统随机接入过程不同的是,终端设备在完成前导码发送后不需要监听RAR,在LTM执行阶段,网络设备将目标小区的TA信息通过LTM小区切换命令下发给终端设备,这样就可以省去终端设备在收到切换命令后再通过随机接入过程获取目标小区TA所产生的切换中断时延。
源小区基于终端设备上报的L1测量结果,确定终端设备在什么时间,向哪个候选小区发起提前上行同步过程。但是,在未来,终端设备可能不需要上报基于L1的测量结果,如条件LTM可能不需要终端设备向网络设备上报对于候选小区的L1测量结果,这种情况下如何实现终端设备与候选小区之间的提前上行同步是亟待解决的问题。
如何实现终端设备与候选小区之间的提前上行同步例如可以包括如何触发终端设备提前与候选小区建立上行同步。图5为本申请一实施例提供的用于无线通信的方法,以解决上述问题。
图5所示的方法可以包括步骤S510。
在步骤S510,第一终端设备根据第一条件确定是否向第一LTM候选小区发起提前上行同步过程。
第一LTM候选小区可以为网络设备为终端设备配置的LTM候选小区中的一个小区。例如,LTM候选小区的信息可以承载在RRC消息中。
这里提到的提前上行同步可以指在确定目标小区之前,终端设备与LTM候选小区之间的上行同步过程。
在一些实施例中,第一条件可以与以下中的一种或多种关联:LTM候选小区的L1测量结果;终端设备的位置;第一定时器;终端设备的移动速度;以及LTM候选小区的TA值是否已知。
如前文所述,条件LTM执行过程中,终端设备可以对候选小区执行L1测量。在一些实施例中,第一条件可以与LTM候选小区的L1测量结果关联。例如,LTM候选小区的L1测量结果可以包括LTM候选小区的小区测量结果,也可以包括LTM候选小区的波束测量结果,也就是说,第一条件可以与LTM候选小区的小区测量结果和/或波束测量结果关联。又如,LTM候选小区的L1测量结果可以包括参考信号接收功率(reference signal received power,RSRP)测量结果,也就是说,第一条件可以与LTM候选小区的RSRP测量结果关联,如第一条件可以与候选小区的小区和/或波束的RSRP测量结果关联。
与终端设备获取到第一LTM候选小区的TA的场景相比,终端设备接入或者准备接入第一LTM候选小区时的场景可能会发生变化。上述场景变化,如终端设备所处的位置变化可能会导致终端设备获取到的TA不适用于终端设备接入第一LTM候选小区时的场景,或者说终端设备接入或准备接入第一LTM候选小区时没有该候选小区的有效TA值。因此,第一条件可以与终端设备获取到TA的场景和/或终端设备接入第一LTM候选小区时的场景关联。基于此,终端设备可以在TA可能不适用于当前场景时,向第一LTM候选小区发起提前上行同步过程,或者说再次触发终端设备与第一LTM候选小区提前进行上行同步,从而有助于避免上述场景变化对TA的影响,进而有助于提高TA的准确度。
上述场景变化例如可以包括终端设备所处的位置的变化。因此,第一条件可以与终端设备的位置关联。例如,第一条件可以与终端设备的位置变化关联,以避免终端设备的位置变化对TA的影响。
在一些实施例中,上述场景变化可能会受到终端设备移动速度的影响,如终端设备移动速度较快时,上述场景发生变化的概率更大。因此,第一条件可以与终端设备的移动速度关联。
在一些实施例中,第一条件可以与第一定时器关联。例如,当终端设备获取到第一LTM候选小区的TA经过了一定的时间,终端设备所处的场景可能会发生变化。因此,第一条件与第一定时器关联,可以避免终端设备所处的场景变化对TA的影响。同时,第一条件与第一定时器关联,可以避免终端设备所处的场景的多种变化对TA的影响,且便于实现。
在一些实施例中,第一条件可以与LTM候选小区的TA值是否已知关联。如果LTM候选小区的TA值已知,那么终端设备可以不用向第一LTM候选小区发起上行同步过程,以节约开销。
下文将结合具体的示例对本申请实施例提供的第一条件的多种情况进行详细介绍。
在一些实施例中,前文提到的第一条件与终端设备的位置关联,可以包括第一条件与终端设备的当前位置和/或终端设备的参考位置关联。
基于前文的分析可知,终端设备的参考位置例如可以为终端设备接收到LTM候选小区的TA时所处的位置。
又如,终端设备的参考位置还可以包括终端设备执行LTM时所处的位置。作为一个示例,在一些情况下,一定时间内终端设备可能会在LTM候选小区中执行多次切换,也就是说,终端设备的当前服务小区可能为LTM候选小区中的某个小区。这种情况下,当终端设备从当前服务小区通过LTM接入到其他某个候选小区时,可以保存当前服务小区的TA值,以便终端设备再次回到该小区时使用。也就是说,该TA值是终端设备执行LTM时获取的,或者说,该TA值与终端设备执行LTM时所处的位置相对应。
在一些实施例中,终端设备的当前位置与参考位置之间的位置差值较大时,终端设备获取到的第一LTM候选小区的TA可能不适用于终端设备当前所处的场景。因此,第一条件可以包括当前位置与参考位置之间的位置差大于或等于第一阈值。
在一些实施例中,终端设备的位置变化可以与终端设备的信号质量变化关联。例如,如果终端设备的信号质量变化较大,或者说第一位置终端设备的信号质量和第二位置终端设备的信号质量差值较大,则第一位置与第二位置的位置差可能较大。因此,第一条件还可以包括终端设备的当前位置对应的信号质量与参考位置对应的信号质量之间的差值大于或等于第二阈值。
上述信号质量例如可以通过RSRP测量结果来表征。由于终端设备的位置变化可能会引起当前服务小区的信号质量变化,也可能引起LTM候选小区的信号质量变化。因此,上述信号质量可以基于终端设备测量得到的LTM候选小区的RSRP,和/或服务小区的RSRP确定。也就是说,第一条件例如可以包括终端设备的当前位置对应的服务小区的RSRP与参考位置对应的服务小区RSRP的差值大于或等于第二阈值;和/或第一条件可以包括终端设备的当前位置对应的LTM候选小区的RSRP与参考位置对应的LTM候选小区的RSRP的差值大于或等于第二阈值。
由于终端设备在工作过程中,通常会对信号质量,如RSRP进行测量,因此第一条件的判断可以复用现有的信号质量测量结果,从而有助于降低终端设备的开销。
需要说明的是,上述两种终端设备参考位置可以单独使用,也可以结合使用。本申请对此不做限定。
在一些实施例中,前文提到的第一条件与第一定时器关联,可以包括第一条件与第一定时器以及终端设备接收到LTM候选小区的TA值的时刻关联。例如,第一定时器的启动时刻与终端设备接收到LTM候选小区的TA值的时刻关联。作为一个示例,可以在终端设备接收到LTM候选小区的TA值时,启动第一定时器。
例如,第一条件可以包括第一时长大于或等于第一定时器的定时时长。其中,第一时长基于终端设备接收到LTM候选小区的TA值的时刻与当前时刻之间的时间差确定。作为一个示例,第一时长为终端设备接收到LTM候选小区的TA值的时刻与当前时刻之间的时间差。也就是说,当第一定时器超时时,或者超时之后,终端设备发起向LTM候选小区的提前上行同步过程。
在一些实施例中,第一条件与终端设备的移动速度关联可以包括第一条件与终端设备在接收到LTM候选小区的TA值之后的移动速度关联。
当终端设备的移动速度很慢,或者终端设备未移动时,终端设备所处的场景,如终端设备的位置变化的可能性较小;当终端设备的移动速度较快时,终端设备所处的场景变化的可能性较大。因此,第一条件可以包括终端设备接收到LTM候选小区的TA值后的移动速度大于或等于第三阈值。这里提到的移动速度可以为终端设备的平均移动速度,也可以为终端设备瞬时移动速度。在一些实施例中,终端设备瞬时移动速度对应的阈值可以大于或等于平均移动速度对应的阈值。
如前文所述,第一条件可以与LTM候选小区的L1测量结果关联。例如,第一条件可以包括终端设备对LTM候选小区的L1测量结果大于或等于第五阈值。前文提到,LTM候选小区的L1测量结果
可以包括候选小区的小区测量结果,也可以包括候选小区的波束测量结果。因此,第一条件可以包括终端设备对LTM候选小区的小区测量结果大于或等于第五阈值,和/或终端设备对LTM候选小区的波束测量结果大于或等于第五阈值。其中,这里提到的波束测量结果可以包括至少N(N为大于或等于1的整数)个波束的测量结果,例如,N为1。另外,上述L1测量结果例如可以包括RSRP测量结果。
在一些实施例中,上述第一条件可以为预配置的,也可以基于网络设备发送的第一配置信息,如RRC配置消息确定。也就是说,在一些实施例中,网络设备可以向第一终端设备发送第一配置信息,该第一配置信息可以用于确定第一条件。
在一些实施例中,第一条件与LTM候选小区的TA值是否已知关联,那么第一配置信息可以用于指示LTM候选小区的TA值是否已知。例如,如果第一配置信息包含或指示LTM候选小区的TA值,可以表示LTM候选小区的TA值为已知的;如果第一配置信息未指示LTM候选小区的TA值,可以表示LTM候选小区的TA值为未知的。又如,第一配置信息可以包括第一类型的配置信息和/或第二类型的配置信息,以指示LTM候选小区的TA值可能已知的两种情况。
上述第一类型的配置信息可以用于指示第一小区和第二小区之间的TA的关系;其中:第一小区和第二小区均为第一终端设备的LTM候选小区;或者,第一小区为第一终端设备的服务小区,第二小区为第一终端设备的LTM候选小区。也就是说,第一类型的配置信息可以用于指示LTM候选小区与其他小区之间的TA的关系,其他小区可以是服务小区,也可以是LTM候选小区。
在一些实施例中,第一小区和第二小区之间的TA的关系可以包括以下中的一种或多种:第一小区和第二小区是否属于同一定时提前组(timing advance group,TAG);以及第一小区和第二小区之间的TA的偏移量。
如果第一小区和第二小区属于同一TAG,则第一小区和第二小区的TA值相同。此时,可以通过配置第一小区和第二小区的关联关系进行指示,如使用相同的标识指示第一小区和第二小区属于同一TAG组,也可以通过第一小区和第二小区之间的TA偏移量进行指示,如偏移量为0,使用灵活。
若第一配置信息包括上述第一类型的配置信息,且第一小区的TA值为已知的,那么LTM候选小区的TA值为已知的。
上述第二类型的配置信息可以用于指示LTM候选小区的TA值为0。若第一配置信息包括第二类型的配置信息,那么LTM候选小区的TA值为已知的。
在本申请实施例中,如果LTM候选小区的TA值是已知的,那么终端设备可以不发起与该LTM候选小区的提前上行同步过程,从而有助于节约终端设备的开销。
在一些实施例中,如果LTM候选小区的TA值是未知的,如终端设备未获取到上述第一类型的配置信息和/或第二类型的配置信息,或者说第一配置信息中不包括上述第一类型的配置信息和/或第二类型的配置信息,那么终端设备可以基于前文提到的第一条件中的其他条件,确定是否向第一LTM候选小区发起提前上行同步过程。
在一些实施例中,上述第一条件可以为预配置的,也可以基于网络设备发送的第一配置信息,如RRC配置消息确定。例如,第一配置信息可以包括上述第一阈值和/或第二阈值。又如,第一配置信息可以包括上述第一定时器。可选地,第一配置信息可以包括上述第一定时器的启动条件以及定时时长。又如,第一配置信息可以包括上述第三阈值。可选地,第一配置信息可以包括第三阈值对应的终端设备的移度的类型,如平均移动速度和/或瞬时移动速度。又如,第一配置信息可以包括上述第五阈值。可选地,第一配置信息可以包括第五阈值对应的L1测量结果的类型,如小区测量结果和/或波束测量结果。可选地,第一配置信息可以包括第五阈值对应的L1测量结果对应的参数,如RSRP。又如,第一配置信息可以包括第一类型的配置信息,和/或第二类型的配置信息。
需要说明的是,上述终端设备确定是否向第一LTM候选小区发起提前上行同步过程的多种条件,可以单独使用,也可以相互结合。例如,如果终端设备的位置变化是否满足第一条件可以与LTM候选小区的L1测量结果是否满足第一条件组合使用,也就是说,如果终端设备的位置变化满足第一条件,还需要判断第一LTM候选小区的L1测量结果是否满足第一条件,才能确定是否向第一LTM候选小区发起提前上行同步过程。又如,终端设备的移动速度是否满足第一条件,以及终端设备的位置变化是否满足第一条件的判断结果中,至少一个判断结果为是,则终端设备向第一LTM候选小区发起提前上行同步过程。另如,如果终端设备的位置变化满足第一条件,则终端设备还可以基于第一配置信息确定第一LTM候选小区的TA值是否已知,从而确定是否向第一LTM候选小区发起提前上行同步过程。
需要说明的是,第一配置信息可以包括一个或多个配置信息,也就是说,上述第一条件中包含的多种条件可以基于同一个配置信息确定,也可以基于不同的配置信息确定。
本申请实施例中,基于提前上行同步的触发条件(即第一条件),终端设备可以发起与LTM候选小区的提前上行同步过程;从而有助于终端设备在不上报L1测量结果的情况下,或者说网络设备未触
发提前上行同步、未指示提前上行同步资源的情况下,实现终端设备与LTM候选小区的提前上行同步过程。
在一些实施例中,可能会存在多个LTM候选小区满足触发提前上行同步过程的条件,终端设备可以基于一定的规则选取第一LTM候选小区。例如,第一终端设备的多个LTM候选小区满足第一条件,第一LTM候选小区基于以下中的一种或多种从多个LTM候选小区中确定:多个LTM候选小区的L1测量结果;以及多个LTM候选小区是否配置了终端设备专属CFRA资源。
作为一个示例,在满足第一条件的多个LTM候选小区中,终端设备可以优先选择更有可能成为终端设备目标小区的候选小区。比如,终端设备可以优先选择L1测量结果最好的候选小区,或L1测量结果较好的候选小区。如果LTM候选小区中的第三小区和第四小区均满足第一条件,且第四小区的RSRP测量结果大于第三小区的RSRP的测量结果,则终端设备可以选择第四小区作为第一LTM候选小区。
作为另一个示例,在满足第一条件的多个LTM候选小区中,终端设备可以优先选择配置了终端设备专属的CFRA资源的候选小区,从而有助于提高终端设备与LTM候选小区的提前上行同步成功的概率。
在一些实施例中,上述LTM可以为条件LTM。也就是说,第一终端设备根据第一条件确定是否向第一LTM候选小区发起提前上行同步过程,可以包括在条件LTM过程中或执行条件LTM过程前,第一终端设备根据第一条件确定是否向第一LTM候选小区发起提前上行同步过程。
在一些实施例中,上述第一配置信息除了包括第一条件之外,还可以包括以下中的一种或多种:至少一个候选小区配置,测量配置,以及第一资源配置。
其中,候选小区配置可以包括每个候选小区配置关联一个候选小区索引和执行条件;测量配置可以用于终端设备执行与候选小区相关的L1测量,例如,测量配置中包括频点配置,同步信号块测量定时配置(SS/PBCH block measurement timing configuration,SMTC),滤波系数等;第一资源配置可以包括用于提前上行同步过程的资源配置,如下行参考信息,上行参考信号(例如,探测参考信号(sounding reference signal,SRS)),物理上行控制信道(physical uplink control channel,PUCCH)资源,物理上行共享信道(physical uplink shared channel,PUSCH)资源,随机接入资源。
如何实现终端设备与候选小区之间的提前上行同步例如可以包括如何确定终端设备与候选小区提前建立上行同步所使用的资源。图6为本申请另一实施例提供的用于无线通信的方法的流程示意图,以解决上述问题。
图6所示的方法涉及第一终端设备和网络设备,下面站在第一终端设备和网络设备交互的角度对本申请实施例提供的方法进行介绍。其中,图6所示的方法可以包括步骤S610。
在步骤S610中,第一终端设备向网络设备发送随机接入请求。或者网络设备接收第一终端设备的随机接入请求。
上述随机接入请求用于与LTM候选小区提前进行上行同步,随机接入请求与第一随机接入资源关联,或者说第一随机接入资源可以用于发送随机接入请求。其中,第一随机接入资源可以为以下中的一种:CFRA资源;两步CBRA资源;以及四步CBRA资源。
第一终端设备与第一LTM候选小区之间的提前上行同步过程,需要第一终端设备在与当前服务小区保持连接的情况下,与第一LTM候选小区建立提前上行同步。在这种情况下,第一终端设备可能无法从第一LTM候选小区获取一些与竞争关联的信息,如冲突解决的信息。基于此,第一终端设备可以优先使用CFRA资源进行提前上行同步,以提高该提前上行同步过程的可靠性。
在一些实施例中,如果网络设备为第一终端设备配置了第一CFRA资源和第一CBRA资源,则第一CFRA资源的优先级高于第一CBRA资源。也就是说,如果终端设备被配置了CFRA资源和CBRA资源,则终端设备优先使用CFRA资源进行提前上行同步。
在一些实施例中,如果网络设备为第一终端设备配置了第一CFRA资源和第一CBRA资源,则第一CBRA资源在第一CFRA资源不可用的情况下使用。也就是说,如果终端设备被配置了CFRA资源和CBRA资源,且CFRA资源不可用,则终端设备使用CBRA资源进行提前上行同步。
上述第一CFRA资源不可用例如可以指第一终端设备的LTM候选小区的波束测量结果较差,如关联CFRA资源的SSB的测量结果小于或等于预设阈值。这种情况下,不使用CFRA资源进行提前上行同步,有助于避免上行同步失败。
在一些实施例中,第一终端设备可以基于网络设备的指示确定是否可以使用CBRA资源进行提前上行同步。例如,第一终端设备可以接收网络设备发送的第一指示信息,第一指示信息可以用于指示是否允许第一终端设备发起基于CBRA的提前上行同步过程。
在一些实施例中,图6所示的方法还可以包括步骤S620。在本申请实施例中,终端设备可以通过
第一请求以获取用于提前上行同步的资源。
在步骤S620中,第一终端设备向网络设备发送第一请求。或者网络设备接收第一终端设备发送的第一请求。
上述第一请求可以用于请求网络设备分配用于提前上行同步过程的资源,如随机接入信道(random access channel,RACH)资源或终端设备专属CFRA资源。
在一些实施例中,第一请求是在第二条件不满足的情况下触发的,第二条件与以下中的一种或多种关联:网络设备发送的第一资源配置信息;以及第一终端设备的LTM候选小区的波束测量结果。
在一些实施例中,第二条件可以包括第一资源配置信息包含用于第一终端设备进行提前上行同步过程的资源。也就是说,如果第一资源配置信息中不包含用于第一终端设备进行提前上行同步过程的资源时,第一终端设备可以向网络设备发送上述第一请求。在一些情况下,第一终端设备只允许发起基于CFRA的提前上行同步过程,以提高提前上行同步过程的可靠性。因此,第二条件例如可以包括第一资源配置信息包含终端设备专属CFRA资源。也就是说,如果第一资源配置信息中不包含终端设备专属CFRA资源时,第一终端设备可以向网络设备发送上述第一请求。
在一些实施例中,如果第一资源配置信息包括第一终端设备用于提前上行同步的资源,那么第一终端设备可以基于第一终端设备的LTM候选小区的波束测量结果确定是否使用该资源进行提前上行同步,从而有助于提高提前上行同步结果的可靠性。例如,第二条件可以包括第一资源配置信息包括第一终端设备用于提前上行同步的资源,且一个或多个SSB的测量结果大于或等于第四阈值。其中,一个或多个SSB与第一资源配置信息包含的第一终端设备用于提前上行同步的资源关联。
如前文所述,在一些情况下,第一终端设备只允许发起基于CFRA的提前上行同步过程,因此,第二条件例如可以包括第一资源配置信息包含终端设备专属CFRA资源,且一个或多个SSB的测量结果大于或等于第四阈值。其中,一个或多个SSB与第一资源配置信息包含的终端设备专属CFRA资源关联。
在一些实施例中,第一终端设备是否被允许向网络设备发送第一请求,或者第一终端设备是否被允许在不满足第二条件的情况下,向网络设备发送第一请求,可以基于网络设备的指示确定。换句话说,是否允许第一终端设备向网络设备发送第一请求,或者是否允许第一终端设备在不满足第二条件的情况下,向网络设备发送第一请求,可以基于网络设备的指示确定。
在一些实施例中,第一请求可以包括以下信息中的一种或多种:LTM候选小区的索引;SSB索引;非补充上行链路(non supplimentary uplink,NUL,即正常上行链路)或补充上行链路(supplimentary uplink,SUL)的指示信息;LTM候选小区的部分或全部波束的测量结果;以及LTM候选小区的小区测量结果。
在一些实施例中,网络设备可以通过PDCCH order为终端设备分配用于提前上行同步的RACH资源。例如,网络设备可以响应于上述第一请求,通过PDCCH order为终端设备分配用于提前上行同步的RACH资源。
在一些实施例中,如果第一资源配置信息中包括终端设备专属CFRA资源,或者第一资源配置信息中包括终端设备专属CFRA资源,且第一终端设备仅允许发起基于CFRA的提前上行同步过程,则第一随机接入资源可以为网络设备发送的第一资源配置信息中的终端设备专属CFRA资源。
在一些实施例中,如果第一资源配置信息包括终端设备专属CFRA资源,或者第一终端设备仅允许发起基于CFRA的提前上行同步过程,且第一资源配置信息包括终端设备专属CFRA资源,那么第一随机接入资源可以为终端设备专属CFRA资源中质量较好或测量结果(如与终端设备专属CFRA资源关联的信号的测量结果)较好的资源,或者第一随机接入资源可以为终端设备专属CFRA资源中任一个资源(即该资源可以是随机选择的)。例如,上述终端设备专属CFRA资源关联一个或多个SSB,如果一个或多个SSB中的第一SSB的测量结果大于或等于第四阈值,第一随机接入资源为第一SSB关联的终端设备专属CFRA资源;如果一个或多个SSB的测量结果均小于第四阈值,第一随机接入资源为一个或多个SSB中的第二SSB关联的终端设备专属CFRA资源,第二SSB由第一终端设备从一个或多个SSB中随机选择。
在一些情况下,如第三条件满足时,第一终端设备与LTM候选小区的提前上行同步过程停止。其中,第三条件可以包括以下中的一种或多种:LTM候选小区的信道质量不满足提前上行同步过程的触发条件;提前上行同步过程所基于的CFRA资源不可用;存在L1测量结果优于LTM候选小区的其他LTM候选小区;以及满足触发向服务小区发起随机接入的事件。
上述提前上行同步过程的触发条件可以为前文提到的第一条件。例如,第三条件可以包括LTM候选小区的小区测量结果和/或波束测量结果不满足第五阈值。这里提到的小区测量结果和/或波束测量结果可以指RSRP的测量结果。
上述提前上行同步过程所基于的CFRA资源不可用,可以包括终端设备专属CFRA资源关联的一个或多个SSB的测量结果均小于第四阈值;或者终端设备专属CFRA资源关联的一个或多个SSB的测量结果均小于第四阈值且第一终端设备只允许发起基于CFRA资源的提前上行同步过程。
当终端设备需要同时与服务小区以及第一LTM候选小区执行随机接入过程时,为了保障第一终端设备的通信质量,可以优先与服务小区执行随机接入过程。例如,在满足触发向服务小区发起随机接入的事件时,第一终端设备优先向服务小区发起随机接入过程,也就是说,第一终端设备与LTM候选小区的提前上行同步过程停止。
前文提到,随机接入过程可以包括两步随机接入过程和四步随机接入过程。如果第一随机接入资源为两步CBRA资源,则第一终端设备发送的消息A的净荷中包含以下信息中的一种或多种:LTM候选小区为第一终端设备配置的小区无线网络临时标识(cell radio network temporary identifier,C-RNTI);服务小区的标识;服务DU的标识;以及服务CU的标识。如果第一随机接入资源为四步CBRA资源,则第一终端设备发送的消息3中包含以下信息中的一种或多种:LTM候选小区为第一终端设备配置的C-RNTI;服务小区的标识;服务DU的标识;以及服务CU的标识。
需要说明的是,上述SSB的测量结果例如可以指同步信号参考信号接收功率(synchronization signal reference signal received power,SS-RSRP)测量结果(或者可以称为SSB的SS-RSRP测量结果)。其中,SSB的SS-RSRP测量结果可以指同步信号在每个资源元素(resource element,RE)(或称为资源单元)的平均功率。
在本申请实施例中,可以基于终端设备与LTM候选小区的多种情况,灵活确定用于发起提前上行同步的资源(即第一随机资源),有助于终端设备在不上报L1测量结果情况下实现终端设备与LTM候选小区之间的提前上行同步。
上文结合图1至图6,详细描述了本申请的方法实施例,下面结合图7至图11,详细描述本申请的装置实施例。应理解,方法实施例的描述与装置实施例的描述相互对应,因此,未详细描述的部分可以参见前面方法实施例。
图7为本申请实施例提供的一种终端设备的结构示意图。该终端设备700可以包括确定单元710。
确定单元710,用于根据第一条件确定是否向第一LTM候选小区发起提前上行同步过程;其中,所述第一条件与以下中的一种或多种关联:LTM候选小区的L1测量结果;终端设备的位置;第一定时器;终端设备的移动速度;以及所述LTM候选小区的TA值是否已知。
在一些实施例中,所述第一条件与终端设备的位置关联,包括:所述第一条件与终端设备的当前位置和/或终端设备的参考位置关联。
在一些实施例中,所述参考位置为以下中的一种:终端设备接收到LTM候选小区的TA时所处的位置;以及终端设备执行LTM时所处的位置。
在一些实施例中,所述第一条件包括以下中的一种或多种:所述当前位置与所述参考位置之间的位置差大于或等于第一阈值;以及所述当前位置对应的信号质量与所述参考位置对应的信号质量之间的差值大于或等于第二阈值。
在一些实施例中,所述信号质量基于终端设备测量得到的所述LTM候选小区的RSRP,和/或服务小区的RSRP确定。
在一些实施例中,所述第一条件与所述第一定时器关联,包括:所述第一条件与所述第一定时器以及终端设备接收到LTM候选小区的TA值的时刻关联。
在一些实施例中,所述第一条件包括:第一时长大于或等于所述第一定时器的定时时长;其中,所述第一时长基于终端设备接收到LTM候选小区的TA值的时刻与当前时刻之间的时间差确定。
在一些实施例中,所述第一条件与终端设备的移动速度关联,包括:所述第一条件与终端设备在接收到LTM候选小区的TA值之后的移动速度关联。
在一些实施例中,所述第一条件包括:终端设备接收到LTM候选小区的TA值后的移动速度或平均移动速度大于或等于第三阈值。
在一些实施例中,所述第一条件基于网络设备发送的第一配置信息确定。
在一些实施例中,若所述第一条件与所述LTM候选小区的TA值是否已知关联,所述第一配置信息包括第一类型的配置信息,所述第一类型的配置信息用于指示第一小区和第二小区之间的TA的关系;其中:所述第一小区和所述第二小区均为所述第一终端设备的LTM候选小区;或者,所述第一小区为所述第一终端设备的服务小区,所述第二小区为所述第一终端设备的LTM候选小区。
在一些实施例中,所述第一小区和第二小区之间的TA的关系包括以下中的一种或多种:所述第一小区和所述第二小区是否属于同一TAG;以及所述第一小区和所述第二小区之间的TA的偏移量。
在一些实施例中,若所述第一配置信息包括所述第一类型的配置信息,且所述第一小区的TA值为
已知的,那么所述LTM候选小区的TA值为已知的。
在一些实施例中,若所述第一条件与所述LTM候选小区的TA值是否已知关联,所述第一配置信息包括第二类型的配置信息,所述第二类型的配置信息用于指示所述LTM候选小区的TA值为0。
在一些实施例中,所述第一配置信息承载在RRC配置消息中。
在一些实施例中,所述第一终端设备的多个LTM候选小区满足所述第一条件,所述第一LTM候选小区基于以下中的一种或多种从所述多个LTM候选小区中确定:所述多个LTM候选小区的L1测量结果;以及所述多个LTM候选小区是否配置了终端设备专属CFRA资源。
在一些实施例中,所述第一LTM候选小区为所述多个LTM候选小区中的L1测量结果最好的LTM候选小区;或者,所述第一LTM候选小区为所述多个LTM候选小区中的配置了终端设备专属CFRA资源的LTM候选小区。
在一些实施例中,所述确定单元用于:在条件LTM过程中,根据所述第一条件确定是否向所述第一LTM候选小区发起提前上行同步过程。
图8为本申请实施例提供的另一种终端设备的结构示意图。该终端设备800可以包括第一发送单元810。
第一发送单元810,用于向网络设备发送随机接入请求,所述随机接入请求用于与LTM候选小区提前进行上行同步,所述随机接入请求与第一随机接入资源关联,所述第一随机接入资源为以下中的一种:CFRA资源;两步CBRA资源;以及四步CBRA资源。
在一些实施例中,如果所述网络设备为所述第一终端设备配置了第一CFRA资源和第一CBRA资源,则所述第一CFRA资源的优先级高于所述第一CBRA资源;或者,如果所述网络设备为所述第一终端设备配置了第一CFRA资源和第一CBRA资源,则所述第一CBRA资源在所述第一CFRA资源不可用的情况下使用。
在一些实施例中,所述设备还包括:接收单元,用于接收所述网络设备发送的第一指示信息,所述第一指示信息用于指示是否允许所述第一终端设备发起基于CBRA的提前上行同步过程。
在一些实施例中,所述设备还包括:第二发送单元,用于向所述网络设备发送第一请求,所述第一请求用于请求所述网络设备分配用于提前上行同步过程的RACH资源或终端设备专属CFRA资源。
在一些实施例中,所述第一请求是在第二条件不满足的情况下触发的,所述第二条件与以下中的一种或多种关联:所述网络设备发送的第一资源配置信息;以及所述第一终端设备的LTM候选小区的波束测量结果。
在一些实施例中,所述第二条件包括:所述第一资源配置信息包含终端设备专属CFRA资源;以及
一个或多个SSB的测量结果大于或等于第四阈值;其中,所述一个或多个SSB与所述第一资源配置信息包含的终端设备专属CFRA资源关联。
在一些实施例中,所述第一请求包括以下信息中的一种或多种:所述LTM候选小区的索引;SSB索引;NUL或SUL的指示信息;所述LTM候选小区的部分或全部波束的测量结果;以及所述LTM候选小区的小区测量结果。
在一些实施例中,所述第一随机接入资源为所述网络设备发送的第一资源配置信息中的终端设备专属CFRA资源。
在一些实施例中,所述第一资源配置信息包括终端设备专属CFRA资源,所述终端设备专属CFRA资源关联一个或多个SSB,所述一个或多个SSB中的第一SSB的测量结果大于或等于第四阈值,所述第一随机接入资源为所述第一SSB关联的终端设备专属CFRA资源;或者,所述第一资源配置信息包括终端设备专属CFRA资源,所述终端设备专属CFRA资源关联一个或多个SSB,且所述一个或多个SSB的测量结果均小于第四阈值,所述第一随机接入资源为所述一个或多个SSB中的第二SSB关联的终端设备专属CFRA资源,所述第二SSB由所述第一终端设备从所述一个或多个SSB中随机选择。
在一些实施例中,所述第一终端设备仅允许发起基于CFRA的提前上行同步过程。
在一些实施例中,如果第三条件满足,则所述第一终端设备与所述LTM候选小区的提前上行同步过程停止;其中,所述第三条件包括以下中的一种或多种:所述LTM候选小区的信道质量不满足所述提前上行同步过程的触发条件;所述提前上行同步过程所基于的CFRA资源不可用;存在L1测量结果优于所述LTM候选小区的其他LTM候选小区;以及满足触发向服务小区发起随机接入的事件。
在一些实施例中,如果所述第一随机接入资源为两步CBRA资源,则所述第一终端设备发送的消息A的净荷中包含以下信息中的一种或多种:所述LTM候选小区为所述第一终端设备配置的C-RNTI;服务小区的标识;服务DU的标识;以及服务CU的标识。
在一些实施例中,如果所述第一随机接入资源为四步CBRA资源,则所述第一终端设备发送的消息3中包含以下信息中的一种或多种:所述LTM候选小区为所述第一终端设备配置的C-RNTI;服务
小区的标识;服务DU的标识;以及服务CU的标识。
图9为本申请实施例提供的一种网络设备的结构示意图。该网络设备900可以包括发送单元910。
发送单元910,用于向第一终端设备发送第一配置信息,所述第一配置信息用于确定第一条件,所述第一条件用于确定是否向第一LTM候选小区发起提前上行同步过程;其中,所述第一条件与以下中的一种或多种关联:LTM候选小区的L1测量结果;终端设备的位置;第一定时器;终端设备的移动速度;以及所述LTM候选小区的TA值是否已知。
在一些实施例中,所述第一条件与终端设备的位置关联,包括:所述第一条件与终端设备的当前位置和/或终端设备的参考位置关联。
在一些实施例中,所述参考位置为以下中的一种:终端设备接收到LTM候选小区的TA时所处的位置;以及终端设备执行LTM时所处的位置。
在一些实施例中,所述第一条件包括以下中的一种或多种:所述当前位置与所述参考位置之间的位置差大于或等于第一阈值;以及所述当前位置对应的信号质量与所述参考位置对应的信号质量之间的差值大于或等于第二阈值。
在一些实施例中,所述信号质量基于终端设备测量得到的所述LTM候选小区的RSRP,和/或服务小区的RSRP确定。
在一些实施例中,所述第一条件与所述第一定时器关联,包括:所述第一条件与所述第一定时器以及终端设备接收到LTM候选小区的TA值的时刻关联。
在一些实施例中,所述第一条件包括:第一时长大于或等于所述第一定时器的定时时长;其中,所述第一时长基于终端设备接收到LTM候选小区的TA值的时刻与当前时刻之间的时间差确定。
在一些实施例中,所述第一条件与终端设备的移动速度关联,包括:所述第一条件与终端设备在接收到LTM候选小区的TA值之后的移动速度关联。
在一些实施例中,所述第一条件包括:终端设备接收到LTM候选小区的TA值后的移动速度或平均移动速度大于或等于第三阈值。
在一些实施例中,若所述第一条件与所述LTM候选小区的TA值是否已知关联,所述第一配置信息包括第一类型的配置信息,所述第一类型的配置信息用于指示第一小区和第二小区之间的TA的关系;其中:所述第一小区和所述第二小区均为所述第一终端设备的LTM候选小区;或者,所述第一小区为所述第一终端设备的服务小区,所述第二小区为所述第一终端设备的LTM候选小区。
在一些实施例中,所述第一小区和第二小区之间的TA的关系包括以下中的一种或多种:所述第一小区和所述第二小区是否属于同一TAG;以及所述第一小区和所述第二小区之间的TA的偏移量。
在一些实施例中,若所述第一配置信息包括所述第一类型的配置信息,且所述第一小区的TA值为已知的,那么所述LTM候选小区的TA值为已知的。
在一些实施例中,若所述第一条件与所述LTM候选小区的TA值是否已知关联,所述第一配置信息包括第二类型的配置信息,所述第二类型的配置信息用于指示所述LTM候选小区的TA值为0。
在一些实施例中,所述第一配置信息承载在RRC配置消息中。
在一些实施例中,所述第一终端设备的多个LTM候选小区满足所述第一条件,所述第一LTM候选小区基于以下中的一种或多种从所述多个LTM候选小区中确定:所述多个LTM候选小区的L1测量结果;以及所述多个LTM候选小区是否配置了终端设备专属CFRA资源。
在一些实施例中,所述第一LTM候选小区为所述多个LTM候选小区中的L1测量结果最好的LTM候选小区;或者,所述第一LTM候选小区为所述多个LTM候选小区中的配置了终端设备专属CFRA资源的LTM候选小区。
在一些实施例中,所述网络设备向第一终端设备发送第一配置信息,包括:在条件LTM过程中,所述网络设备向所述第一终端设备发送所述第一配置信息。
图10为本申请实施例提供的一种网络设备的结构示意图。该网络设备1000可以包括第一接收单元1010。
第一接收单元1010,用于接收第一终端设备发送的随机接入请求,所述随机接入请求用于与LTM候选小区提前进行上行同步,所述随机接入请求与第一随机接入资源关联,所述第一随机接入资源为以下中的一种:CFRA资源;两步CBRA资源;以及四步CBRA资源。
在一些实施例中,如果所述网络设备为所述第一终端设备配置了第一CFRA资源和第一CBRA资源,则所述第一CFRA资源的优先级高于所述第一CBRA资源;或者,如果所述网络设备为所述第一终端设备配置了第一CFRA资源和第一CBRA资源,则所述第一CBRA资源在所述第一CFRA资源不可用的情况下使用。
在一些实施例中,所述设备还包括:发送单元,用于向所述第一终端设备发送第一指示信息,所述
第一指示信息用于指示是否允许所述第一终端设备发起基于CBRA的提前上行同步过程。
在一些实施例中,所述设备还包括:第二接收单元,用于接收所述第一终端设备发送的第一请求,所述第一请求用于请求所述网络设备分配用于提前上行同步过程的RACH资源或终端设备专属CFRA资源。
在一些实施例中,所述第一请求是在第二条件不满足的情况下触发的,所述第二条件与以下中的一种或多种关联:所述网络设备发送的第一资源配置信息;以及所述第一终端设备的LTM候选小区的波束测量结果。
在一些实施例中,所述第二条件包括:所述第一资源配置信息包含终端设备专属CFRA资源;以及一个或多个SSB的测量结果大于或等于第四阈值;其中,所述一个或多个SSB与所述第一资源配置信息包含的CFRA资源关联。
在一些实施例中,所述第一请求包括以下信息中的一种或多种:所述LTM候选小区的索引;SSB索引;NUL或SUL的指示信息;所述LTM候选小区的部分或全部波束的测量结果;以及所述LTM候选小区的小区测量结果。
在一些实施例中,所述第一随机接入资源为所述网络设备发送的第一资源配置信息中的终端设备专属CFRA资源。
在一些实施例中,所述第一资源配置信息包括终端设备专属CFRA资源,所述终端设备专属CFRA资源关联一个或多个SSB,所述一个或多个SSB中的第一SSB的测量结果大于或等于第四阈值,所述第一随机接入资源为所述第一SSB关联的终端设备专属CFRA资源;或者,所述第一资源配置信息包括终端设备专属CFRA资源,所述终端设备专属CFRA资源关联一个或多个SSB,且所述一个或多个SSB的测量结果均小于第四阈值,所述第一随机接入资源为所述一个或多个SSB中的第二SSB关联的终端设备专属CFRA资源,所述第二SSB由所述第一终端设备从所述一个或多个SSB中随机选择。
在一些实施例中,所述第一终端设备仅允许发起基于CFRA的提前上行同步过程。
在一些实施例中,如果第三条件满足,则所述第一终端设备与所述LTM候选小区的提前上行同步过程停止;其中,所述第三条件包括以下中的一种或多种:所述LTM候选小区的信道质量不满足所述提前上行同步过程的触发条件;所述提前上行同步过程所基于的CFRA资源不可用;存在L1测量结果优于所述LTM候选小区的其他LTM候选小区;以及满足触发向服务小区发起随机接入的事件。
在一些实施例中,如果所述第一随机接入资源为两步CBRA资源,则所述第一终端设备发送的消息A的净荷中包含以下信息中的一种或多种:所述LTM候选小区为所述第一终端设备分配的C-RNTI;服务小区的标识;服务DU的标识;以及服务CU的标识。
在一些实施例中,如果所述第一随机接入资源为四步CBRA资源,则所述第一终端设备发送的消息3中包含以下信息中的一种或多种:所述LTM候选小区为所述第一终端设备分配的C-RNTI;服务小区的标识;服务DU的标识;以及服务CU的标识。
在可选地实施例中,上文所述的发送单元和接收单元可以为收发器1130。终端设备700、终端设备800、网络设备900、网络设备1000还可以包括处理器1110和存储器1120,具体如图11所示。
图11是本申请实施例的通信装置的示意性结构图。图11中的虚线表示该单元或模块为可选的。该装置1100可用于实现上述方法实施例中描述的方法。装置1100可以是芯片或终端设备或网络设备。
装置1100可以包括一个或多个处理器1110。该处理器1110可支持装置1100实现前文方法实施例所描述的方法。该处理器1110可以是通用处理器或者专用处理器。例如,该处理器可以为中央处理单元(central processing unit,CPU)。或者,该处理器还可以是其他通用处理器、数字信号处理器(digital signal processor,DSP)、专用集成电路(application specific integrated circuit,ASIC)、现场可编程门阵列(field programmable gate array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
装置1100还可以包括一个或多个存储器1120。存储器1120上存储有程序,该程序可以被处理器1110执行,使得处理器1110执行前文方法实施例所描述的方法。存储器1120可以独立于处理器1110也可以集成在处理器1110中。
装置1100还可以包括收发器1130。处理器1110可以通过收发器1130与其他设备或芯片进行通信。例如,处理器1110可以通过收发器1130与其他设备或芯片进行数据收发。
本申请实施例还提供一种计算机可读存储介质,用于存储程序。该计算机可读存储介质可应用于本申请实施例提供的终端或网络设备中,并且该程序使得计算机执行本申请各个实施例中的由终端设备或网络设备执行的方法。
本申请实施例还提供一种计算机程序产品。该计算机程序产品包括程序。该计算机程序产品可应用于本申请实施例提供的终端或网络设备中,并且该程序使得计算机执行本申请各个实施例中的由终端
或网络设备执行的方法。
本申请实施例还提供一种计算机程序。该计算机程序可应用于本申请实施例提供的终端设备或网络设备中,并且该计算机程序使得计算机执行本申请各个实施例中的由终端设备或网络设备执行的方法。
应理解,本申请中术语“系统”和“网络”可以被可互换使用。另外,本申请使用的术语仅用于对本申请的具体实施例进行解释,而非旨在限定本申请。本申请的说明书和权利要求书及所述附图中的术语“第一”、“第二”、“第三”和“第四”等是用于区别不同对象,而不是用于描述特定顺序。此外,术语“包括”和“具有”以及它们任何变形,意图在于覆盖不排他的包含。
在本申请的实施例中,提到的“指示”可以是直接指示,也可以是间接指示,还可以是表示具有关联关系。举例说明,A指示B,可以表示A直接指示B,例如B可以通过A获取;也可以表示A间接指示B,例如A指示C,B可以通过C获取;还可以表示A和B之间具有关联关系。
本申请的实施例,提到的“包括”可以指直接包括,也可以指间接包括。可选地,可以将本申请实施例中提到的“包括”替换为“指示”或“用于确定”。例如,A包括B,可以替换为A指示B,或A用于确定B。
在本申请实施例中,“与A相应的B”表示B与A相关联,根据A可以确定B。但还应理解,根据A确定B并不意味着仅仅根据A确定B,还可以根据A和/或其它信息确定B。
在本申请实施例中,术语“对应”可表示两者之间具有直接对应或间接对应的关系,也可以表示两者之间具有关联关系,也可以是指示与被指示、配置与被配置等关系。
本申请实施例中,“预定义”或“预配置”可以通过在设备(例如,包括终端设备和网络设备)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现,本申请对于其具体的实现方式不做限定。比如预定义可以是指协议中定义的。
本申请实施例中,所述“协议”可以指通信领域的标准协议,例如可以包括LTE协议、NR协议以及应用于未来的通信系统中的相关协议,本申请对此不做限定。
本申请实施例中术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本文中字符“/”,一般表示前后关联对象是一种“或”的关系。
在本申请的各种实施例中,上述各过程的序号的大小并不意味着执行顺序的先后,各过程的执行顺序应以其功能和内在逻辑确定,而不应对本申请实施例的实施过程构成任何限定。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
在上述实施例中,可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时,可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时,全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一个计算机可读存储介质传输,例如,所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line,DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够读取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质,(例如,软盘、硬盘、磁带)、光介质(例如,数字通用光盘(digital video disc,DVD))或者半导体介质(例如,固态硬盘(solid state disk,SSD))等。
以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应以所述权利要求的保护范围为准。
Claims (134)
- 一种用于无线通信的方法,其特征在于,包括:第一终端设备根据第一条件确定是否向第一层1/层2触发的移动性LTM候选小区发起提前上行同步过程;其中,所述第一条件与以下中的一种或多种关联:LTM候选小区的层1L1测量结果;终端设备的位置;第一定时器;终端设备的移动速度;以及所述LTM候选小区的定时提前TA值是否已知。
- 根据权利要求1所述的方法,其特征在于,所述第一条件与终端设备的位置关联,包括:所述第一条件与终端设备的当前位置和/或终端设备的参考位置关联。
- 根据权利要求2所述的方法,其特征在于,所述参考位置为以下中的一种:终端设备接收到LTM候选小区的TA时所处的位置;以及终端设备执行LTM时所处的位置。
- 根据权利要求2或3所述的方法,其特征在于,所述第一条件包括以下中的一种或多种:所述当前位置与所述参考位置之间的位置差大于或等于第一阈值;以及所述当前位置对应的信号质量与所述参考位置对应的信号质量之间的差值大于或等于第二阈值。
- 根据权利要求4所述的方法,其特征在于,所述信号质量基于终端设备测量得到的所述LTM候选小区的参考信号接收功率RSRP,和/或服务小区的RSRP确定。
- 根据权利要求1至5中任一项所述的方法,其特征在于,所述第一条件与所述第一定时器关联,包括:所述第一条件与所述第一定时器以及终端设备接收到LTM候选小区的TA值的时刻关联。
- 根据权利要求6所述的方法,其特征在于,所述第一条件包括:第一时长大于或等于所述第一定时器的定时时长;其中,所述第一时长基于终端设备接收到LTM候选小区的TA值的时刻与当前时刻之间的时间差确定。
- 根据权利要求1至7中任一项所述的方法,其特征在于,所述第一条件与终端设备的移动速度关联,包括:所述第一条件与终端设备在接收到LTM候选小区的TA值之后的移动速度关联。
- 根据权利要求8所述的方法,其特征在于,所述第一条件包括:终端设备接收到LTM候选小区的TA值后的移动速度或平均移动速度大于或等于第三阈值。
- 根据权利要求1至9中任一项所述的方法,其特征在于,所述第一条件基于网络设备发送的第一配置信息确定。
- 根据权利要求10所述的方法,其特征在于,若所述第一条件与所述LTM候选小区的TA值是否已知关联,所述第一配置信息包括第一类型的配置信息,所述第一类型的配置信息用于指示第一小区和第二小区之间的TA的关系;其中:所述第一小区和所述第二小区均为所述第一终端设备的LTM候选小区;或者,所述第一小区为所述第一终端设备的服务小区,所述第二小区为所述第一终端设备的LTM候选小区。
- 根据权利要求11所述的方法,其特征在于,所述第一小区和第二小区之间的TA的关系包括以下中的一种或多种:所述第一小区和所述第二小区是否属于同一定时提前组TAG;以及所述第一小区和所述第二小区之间的TA的偏移量。
- 根据权利要求11或12所述的方法,其特征在于,若所述第一配置信息包括所述第一类型的配置信息,且所述第一小区的TA值为已知的,那么所述LTM候选小区的TA值为已知的。
- 根据权利要求10所述的方法,其特征在于,若所述第一条件与所述LTM候选小区的TA值是否已知关联,所述第一配置信息包括第二类型的配置信息,所述第二类型的配置信息用于指示所述LTM候选小区的TA值为0。
- 根据权利要求10至14中任一项所述的方法,其特征在于,所述第一配置信息承载在无线资源控制RRC配置消息中。
- 根据权利要求1至15中任一项所述的方法,其特征在于,所述第一终端设备的多个LTM候选小区满足所述第一条件,所述第一LTM候选小区基于以下中的一种或多种从所述多个LTM候选小区中确定:所述多个LTM候选小区的L1测量结果;以及所述多个LTM候选小区是否配置了终端设备专属基于非竞争的随机接入CFRA资源。
- 根据权利要求16所述的方法,其特征在于:所述第一LTM候选小区为所述多个LTM候选小区中的L1测量结果最好的LTM候选小区;或者,所述第一LTM候选小区为所述多个LTM候选小区中的配置了终端设备专属CFRA资源的LTM候选小区。
- 根据权利要求1至17中任一项所述的方法,其特征在于,所述第一终端设备根据第一条件确定是否向第一LTM候选小区发起提前上行同步过程,包括:在条件LTM过程中,所述第一终端设备根据所述第一条件确定是否向所述第一LTM候选小区发起提前上行同步过程。
- 一种用于无线通信的方法,其特征在于,包括:第一终端设备向网络设备发送随机接入请求,所述随机接入请求用于与层1/层2触发的移动性LTM候选小区提前进行上行同步,所述随机接入请求与第一随机接入资源关联,所述第一随机接入资源为以下中的一种:基于非竞争的随机接入CFRA资源;两步基于竞争的随机接入CBRA资源;以及四步CBRA资源。
- 根据权利要求19所述的方法,其特征在于:如果所述网络设备为所述第一终端设备配置了第一CFRA资源和第一CBRA资源,则所述第一CFRA资源的优先级高于所述第一CBRA资源;或者,如果所述网络设备为所述第一终端设备配置了第一CFRA资源和第一CBRA资源,则所述第一CBRA资源在所述第一CFRA资源不可用的情况下使用。
- 根据权利要求19或20所述的方法,其特征在于,所述方法还包括:所述第一终端设备接收所述网络设备发送的第一指示信息,所述第一指示信息用于指示是否允许所述第一终端设备发起基于CBRA的提前上行同步过程。
- 根据权利要求19至21中任一项所述的方法,其特征在于,所述方法还包括:所述第一终端设备向所述网络设备发送第一请求,所述第一请求用于请求所述网络设备分配用于提前上行同步过程的随机接入信道RACH资源或终端设备专属CFRA资源。
- 根据权利要求22所述的方法,其特征在于,所述第一请求是在第二条件不满足的情况下触发的,所述第二条件与以下中的一种或多种关联:所述网络设备发送的第一资源配置信息;以及所述第一终端设备的LTM候选小区的波束测量结果。
- 根据权利要求23所述的方法,其特征在于,所述第二条件包括:所述第一资源配置信息包含终端设备专属CFRA资源;以及一个或多个同步信号块SSB的测量结果大于或等于第四阈值;其中,所述一个或多个SSB与所述第一资源配置信息包含的终端设备专属CFRA资源关联。
- 根据权利要求22至24中任一项所述的方法,其特征在于,所述第一请求包括以下信息中的一种或多种:所述LTM候选小区的索引;SSB索引;非补充上行链路NUL或补充上行链路SUL的指示信息;所述LTM候选小区的部分或全部波束的测量结果;以及所述LTM候选小区的小区测量结果。
- 根据权利要求19至21中任一项所述的方法,其特征在于,所述第一随机接入资源为所述网络设备发送的第一资源配置信息中的终端设备专属CFRA资源。
- 根据权利要求26所述的方法,其特征在于:所述第一资源配置信息包括终端设备专属CFRA资源,所述终端设备专属CFRA资源关联一个或多个SSB,所述一个或多个SSB中的第一SSB的测量结果大于或等于第四阈值,所述第一随机接入资源为所述第一SSB关联的终端设备专属CFRA资源;或者,所述第一资源配置信息包括终端设备专属CFRA资源,所述终端设备专属CFRA资源关联一个或多个SSB,且所述一个或多个SSB的测量结果均小于第四阈值,所述第一随机接入资源为所述一个或多个SSB中的第二SSB关联的终端设备专属CFRA资源,所述第二SSB由所述第一终端设备从所述一个或多个SSB中随机选择。
- 根据权利要求22至27中任一项所述的方法,其特征在于,所述第一终端设备仅允许发起基于CFRA的提前上行同步过程。
- 根据权利要求19至28中任一项所述的方法,其特征在于,如果第三条件满足,则所述第一终端设备与所述LTM候选小区的提前上行同步过程停止;其中,所述第三条件包括以下中的一种或多种:所述LTM候选小区的信道质量不满足所述提前上行同步过程的触发条件;所述提前上行同步过程所基于的CFRA资源不可用;存在L1测量结果优于所述LTM候选小区的其他LTM候选小区;以及满足触发向服务小区发起随机接入的事件。
- 根据权利要求19至21中任一项所述的方法,其特征在于,如果所述第一随机接入资源为两步CBRA资源,则所述第一终端设备发送的消息A的净荷中包含以下信息中的一种或多种:所述LTM候选小区为所述第一终端设备配置的小区无线网络临时标识C-RNTI;服务小区的标识;服务分布式单元DU的标识;以及服务中心单元CU的标识。
- 根据权利要求19至21中任一项所述的方法,其特征在于,如果所述第一随机接入资源为四步CBRA资源,则所述第一终端设备发送的消息3中包含以下信息中的一种或多种:所述LTM候选小区为所述第一终端设备配置的C-RNTI;服务小区的标识;服务DU的标识;以及服务CU的标识。
- 一种用于无线通信的方法,其特征在于,包括:网络设备向第一终端设备发送第一配置信息,所述第一配置信息用于确定第一条件,所述第一条件用于确定是否向第一层1/层2触发的移动性LTM候选小区发起提前上行同步过程;其中,所述第一条件与以下中的一种或多种关联:LTM候选小区的层1L1测量结果;终端设备的位置;第一定时器;终端设备的移动速度;以及所述LTM候选小区的定时提前TA值是否已知。
- 根据权利要求32所述的方法,其特征在于,所述第一条件与终端设备的位置关联,包括:所述第一条件与终端设备的当前位置和/或终端设备的参考位置关联。
- 根据权利要求33所述的方法,其特征在于,所述参考位置为以下中的一种:终端设备接收到LTM候选小区的TA时所处的位置;以及终端设备执行LTM时所处的位置。
- 根据权利要求33或34所述的方法,其特征在于,所述第一条件包括以下中的一种或多种:所述当前位置与所述参考位置之间的位置差大于或等于第一阈值;以及所述当前位置对应的信号质量与所述参考位置对应的信号质量之间的差值大于或等于第二阈值。
- 根据权利要求35所述的方法,其特征在于,所述信号质量基于终端设备测量得到的所述LTM候选小区的参考信号接收功率RSRP,和/或服务小区的RSRP确定。
- 根据权利要求32至36中任一项所述的方法,其特征在于,所述第一条件与所述第一定时器关联,包括:所述第一条件与所述第一定时器以及终端设备接收到LTM候选小区的TA值的时刻关联。
- 根据权利要求37所述的方法,其特征在于,所述第一条件包括:第一时长大于或等于所述第一定时器的定时时长;其中,所述第一时长基于终端设备接收到LTM候选小区的TA值的时刻与当前时刻之间的时间差确定。
- 根据权利要求32至38中任一项所述的方法,其特征在于,所述第一条件与终端设备的移动速度关联,包括:所述第一条件与终端设备在接收到LTM候选小区的TA值之后的移动速度关联。
- 根据权利要求39所述的方法,其特征在于,所述第一条件包括:终端设备接收到LTM候选小区的TA值后的移动速度或平均移动速度大于或等于第三阈值。
- 根据权利要求32至40中任一项所述的方法,其特征在于,若所述第一条件与所述LTM候选小区的TA值是否已知关联,所述第一配置信息包括第一类型的配置信息,所述第一类型的配置信息用于指示第一小区和第二小区之间的TA的关系;其中:所述第一小区和所述第二小区均为所述第一终端设备的LTM候选小区;或者,所述第一小区为所述第一终端设备的服务小区,所述第二小区为所述第一终端设备的LTM候选小区。
- 根据权利要求41所述的方法,其特征在于,所述第一小区和第二小区之间的TA的关系包括以下中的一种或多种:所述第一小区和所述第二小区是否属于同一定时提前组TAG;以及所述第一小区和所述第二小区之间的TA的偏移量。
- 根据权利要求41或42所述的方法,其特征在于,若所述第一配置信息包括所述第一类型的配置信息,且所述第一小区的TA值为已知的,那么所述LTM候选小区的TA值为已知的。
- 根据权利要求32至43中任一项所述的方法,其特征在于,若所述第一条件与所述LTM候选小区的TA值是否已知关联,所述第一配置信息包括第二类型的配置信息,所述第二类型的配置信息用于指示所述LTM候选小区的TA值为0。
- 根据权利要求32至44中任一项所述的方法,其特征在于,所述第一配置信息承载在无线资源控制RRC配置消息中。
- 根据权利要求32至45中任一项所述的方法,其特征在于,所述第一终端设备的多个LTM候选小区满足所述第一条件,所述第一LTM候选小区基于以下中的一种或多种从所述多个LTM候选小区中确定:所述多个LTM候选小区的L1测量结果;以及所述多个LTM候选小区是否配置了终端设备专属基于非竞争的随机接入CFRA资源。
- 根据权利要求46所述的方法,其特征在于:所述第一LTM候选小区为所述多个LTM候选小区中的L1测量结果最好的LTM候选小区;或者,所述第一LTM候选小区为所述多个LTM候选小区中的配置了终端设备专属CFRA资源的LTM候选小区。
- 根据权利要求32至47中任一项所述的方法,其特征在于,所述网络设备向第一终端设备发送第一配置信息,包括:在条件LTM过程中,所述网络设备向所述第一终端设备发送所述第一配置信息。
- 一种用于无线通信的方法,其特征在于,包括:网络设备接收第一终端设备发送的随机接入请求,所述随机接入请求用于与层1/层2触发的移动性LTM候选小区提前进行上行同步,所述随机接入请求与第一随机接入资源关联,所述第一随机接入资源为以下中的一种:基于非竞争的随机接入CFRA资源;两步基于竞争的随机接入CBRA资源;以及四步CBRA资源。
- 根据权利要求49所述的方法,其特征在于:如果所述网络设备为所述第一终端设备配置了第一CFRA资源和第一CBRA资源,则所述第一CFRA资源的优先级高于所述第一CBRA资源;或者,如果所述网络设备为所述第一终端设备配置了第一CFRA资源和第一CBRA资源,则所述第一CBRA资源在所述第一CFRA资源不可用的情况下使用。
- 根据权利要求49或50所述的方法,其特征在于,所述方法还包括:所述网络设备向所述第一终端设备发送第一指示信息,所述第一指示信息用于指示是否允许所述第一终端设备发起基于CBRA的提前上行同步过程。
- 根据权利要求49至51中任一项所述的方法,其特征在于,所述方法还包括:所述网络设备接收所述第一终端设备发送的第一请求,所述第一请求用于请求所述网络设备分配用于提前上行同步过程的随机接入信道RACH资源或终端设备专属CFRA资源。
- 根据权利要求52所述的方法,其特征在于,所述第一请求是在第二条件不满足的情况下触发的,所述第二条件与以下中的一种或多种关联:所述网络设备发送的第一资源配置信息;以及所述第一终端设备的LTM候选小区的波束测量结果。
- 根据权利要求53所述的方法,其特征在于,所述第二条件包括:所述第一资源配置信息包含终端设备专属CFRA资源;以及一个或多个同步信号块SSB的测量结果大于或等于第四阈值;其中,所述一个或多个SSB与所述第一资源配置信息包含的CFRA资源关联。
- 根据权利要求52至54中任一项所述的方法,其特征在于,所述第一请求包括以下信息中的一种或多种:所述LTM候选小区的索引;SSB索引;非补充上行链路NUL或补充上行链路SUL的指示信息;所述LTM候选小区的部分或全部波束的测量结果;以及所述LTM候选小区的小区测量结果。
- 根据权利要求49至51中任一项所述的方法,其特征在于,所述第一随机接入资源为所述网络设备发送的第一资源配置信息中的终端设备专属CFRA资源。
- 根据权利要求56所述的方法,其特征在于:所述第一资源配置信息包括终端设备专属CFRA资源,所述终端设备专属CFRA资源关联一个或多个SSB,所述一个或多个SSB中的第一SSB的测量结果大于或等于第四阈值,所述第一随机接入资源为所述第一SSB关联的终端设备专属CFRA资源;或者,所述第一资源配置信息包括终端设备专属CFRA资源,所述终端设备专属CFRA资源关联一个或多个SSB,且所述一个或多个SSB的测量结果均小于第四阈值,所述第一随机接入资源为所述一个或多个SSB中的第二SSB关联的终端设备专属CFRA资源,所述第二SSB由所述第一终端设备从所述一个或多个SSB中随机选择。
- 根据权利要求52至57中任一项所述的方法,其特征在于,所述第一终端设备仅允许发起基于CFRA的提前上行同步过程。
- 根据权利要求49至58中任一项所述的方法,其特征在于,如果第三条件满足,则所述第一终端设备与所述LTM候选小区的提前上行同步过程停止;其中,所述第三条件包括以下中的一种或多种:所述LTM候选小区的信道质量不满足所述提前上行同步过程的触发条件;所述提前上行同步过程所基于的CFRA资源不可用;存在L1测量结果优于所述LTM候选小区的其他LTM候选小区;以及满足触发向服务小区发起随机接入的事件。
- 根据权利要求49至51中任一项所述的方法,其特征在于,如果所述第一随机接入资源为两步CBRA资源,则所述第一终端设备发送的消息A的净荷中包含以下信息中的一种或多种:所述LTM候选小区为所述第一终端设备分配的小区无线网络临时标识C-RNTI;服务小区的标识;服务分布式单元DU的标识;以及服务中心单元CU的标识。
- 根据权利要求49至51中任一项所述的方法,其特征在于,如果所述第一随机接入资源为四步CBRA资源,则所述第一终端设备发送的消息3中包含以下信息中的一种或多种:所述LTM候选小区为所述第一终端设备分配的C-RNTI;服务小区的标识;服务DU的标识;以及服务CU的标识。
- 一种终端设备,其特征在于,所述终端设备为第一终端设备,所述终端设备包括:确定单元,用于根据第一条件确定是否向第一层1/层2触发的移动性LTM候选小区发起提前上行同步过程;其中,所述第一条件与以下中的一种或多种关联:LTM候选小区的层1L1测量结果;终端设备的位置;第一定时器;终端设备的移动速度;以及所述LTM候选小区的定时提前TA值是否已知。
- 根据权利要求62所述的设备,其特征在于,所述第一条件与终端设备的位置关联,包括:所述第一条件与终端设备的当前位置和/或终端设备的参考位置关联。
- 根据权利要求63所述的设备,其特征在于,所述参考位置为以下中的一种:终端设备接收到LTM候选小区的TA时所处的位置;以及终端设备执行LTM时所处的位置。
- 根据权利要求63或64所述的设备,其特征在于,所述第一条件包括以下中的一种或多种:所述当前位置与所述参考位置之间的位置差大于或等于第一阈值;以及所述当前位置对应的信号质量与所述参考位置对应的信号质量之间的差值大于或等于第二阈值。
- 根据权利要求65所述的设备,其特征在于,所述信号质量基于终端设备测量得到的所述LTM候选小区的参考信号接收功率RSRP,和/或服务小区的RSRP确定。
- 根据权利要求62至66中任一项所述的设备,其特征在于,所述第一条件与所述第一定时器关联,包括:所述第一条件与所述第一定时器以及终端设备接收到LTM候选小区的TA值的时刻关联。
- 根据权利要求67所述的设备,其特征在于,所述第一条件包括:第一时长大于或等于所述第一定时器的定时时长;其中,所述第一时长基于终端设备接收到LTM候选小区的TA值的时刻与当前时刻之间的时间差确定。
- 根据权利要求62至68中任一项所述的设备,其特征在于,所述第一条件与终端设备的移动速度关联,包括:所述第一条件与终端设备在接收到LTM候选小区的TA值之后的移动速度关联。
- 根据权利要求69所述的设备,其特征在于,所述第一条件包括:终端设备接收到LTM候选小区的TA值后的移动速度或平均移动速度大于或等于第三阈值。
- 根据权利要求62至70中任一项所述的设备,其特征在于,所述第一条件基于网络设备发送的第一配置信息确定。
- 根据权利要求71所述的设备,其特征在于,若所述第一条件与所述LTM候选小区的TA值是否已知关联,所述第一配置信息包括第一类型的配置信息,所述第一类型的配置信息用于指示第一小区和第二小区之间的TA的关系;其中:所述第一小区和所述第二小区均为所述第一终端设备的LTM候选小区;或者,所述第一小区为所述第一终端设备的服务小区,所述第二小区为所述第一终端设备的LTM候选小区。
- 根据权利要求72所述的设备,其特征在于,所述第一小区和第二小区之间的TA的关系包括以下中的一种或多种:所述第一小区和所述第二小区是否属于同一定时提前组TAG;以及所述第一小区和所述第二小区之间的TA的偏移量。
- 根据权利要求72或73所述的设备,其特征在于,若所述第一配置信息包括所述第一类型的配置信息,且所述第一小区的TA值为已知的,那么所述LTM候选小区的TA值为已知的。
- 根据权利要求71所述的设备,其特征在于,若所述第一条件与所述LTM候选小区的TA值是否已知关联,所述第一配置信息包括第二类型的配置信息,所述第二类型的配置信息用于指示所述LTM候选小区的TA值为0。
- 根据权利要求71至75中任一项所述的设备,其特征在于,所述第一配置信息承载在无线资源控制RRC配置消息中。
- 根据权利要求62至76中任一项所述的设备,其特征在于,所述第一终端设备的多个LTM候选小区满足所述第一条件,所述第一LTM候选小区基于以下中的一种或多种从所述多个LTM候选小区中确定:所述多个LTM候选小区的L1测量结果;以及所述多个LTM候选小区是否配置了终端设备专属基于非竞争的随机接入CFRA资源。
- 根据权利要求77所述的设备,其特征在于:所述第一LTM候选小区为所述多个LTM候选小区中的L1测量结果最好的LTM候选小区;或者,所述第一LTM候选小区为所述多个LTM候选小区中的配置了终端设备专属CFRA资源的LTM候选小区。
- 根据权利要求62至78中任一项所述的设备,其特征在于,所述确定单元用于:在条件LTM过程中,根据所述第一条件确定是否向所述第一LTM候选小区发起提前上行同步过程。
- 一种终端设备,其特征在于,所述终端设备为第一终端设备,所述终端设备包括:第一发送单元,用于向网络设备发送随机接入请求,所述随机接入请求用于与层1/层2触发的移动性LTM候选小区提前进行上行同步,所述随机接入请求与第一随机接入资源关联,所述第一随机接入资源为以下中的一种:基于非竞争的随机接入CFRA资源;两步基于竞争的随机接入CBRA资源;以及四步CBRA资源。
- 根据权利要求80所述的设备,其特征在于:如果所述网络设备为所述第一终端设备配置了第一CFRA资源和第一CBRA资源,则所述第一CFRA资源的优先级高于所述第一CBRA资源;或者,如果所述网络设备为所述第一终端设备配置了第一CFRA资源和第一CBRA资源,则所述第一CBRA资源在所述第一CFRA资源不可用的情况下使用。
- 根据权利要求80或81所述的设备,其特征在于,所述设备还包括:接收单元,用于接收所述网络设备发送的第一指示信息,所述第一指示信息用于指示是否允许所述第一终端设备发起基于CBRA的提前上行同步过程。
- 根据权利要求80至82中任一项所述的设备,其特征在于,所述设备还包括:第二发送单元,用于向所述网络设备发送第一请求,所述第一请求用于请求所述网络设备分配用于提前上行同步过程的随机接入信道RACH资源或终端设备专属CFRA资源。
- 根据权利要求83所述的设备,其特征在于,所述第一请求是在第二条件不满足的情况下触发的,所述第二条件与以下中的一种或多种关联:所述网络设备发送的第一资源配置信息;以及所述第一终端设备的LTM候选小区的波束测量结果。
- 根据权利要求84所述的设备,其特征在于,所述第二条件包括:所述第一资源配置信息包含终端设备专属CFRA资源;以及一个或多个同步信号块SSB的测量结果大于或等于第四阈值;其中,所述一个或多个SSB与所述第一资源配置信息包含的终端设备专属CFRA资源关联。
- 根据权利要求83至85中任一项所述的设备,其特征在于,所述第一请求包括以下信息中的一种或多种:所述LTM候选小区的索引;SSB索引;非补充上行链路NUL或补充上行链路SUL的指示信息;所述LTM候选小区的部分或全部波束的测量结果;以及所述LTM候选小区的小区测量结果。
- 根据权利要求80至82中任一项所述的设备,其特征在于,所述第一随机接入资源为所述网络设备发送的第一资源配置信息中的终端设备专属CFRA资源。
- 根据权利要求87所述的设备,其特征在于:所述第一资源配置信息包括终端设备专属CFRA资源,所述终端设备专属CFRA资源关联一个或多个SSB,所述一个或多个SSB中的第一SSB的测量结果大于或等于第四阈值,所述第一随机接入资源为所述第一SSB关联的终端设备专属CFRA资源;或者,所述第一资源配置信息包括终端设备专属CFRA资源,所述终端设备专属CFRA资源关联一个或多个SSB,且所述一个或多个SSB的测量结果均小于第四阈值,所述第一随机接入资源为所述一个或多个SSB中的第二SSB关联的终端设备专属CFRA资源,所述第二SSB由所述第一终端设备从所述一个或多个SSB中随机选择。
- 根据权利要求83至88中任一项所述的设备,其特征在于,所述第一终端设备仅允许发起基于CFRA的提前上行同步过程。
- 根据权利要求80至89中任一项所述的设备,其特征在于,如果第三条件满足,则所述第一终端设备与所述LTM候选小区的提前上行同步过程停止;其中,所述第三条件包括以下中的一种或多种:所述LTM候选小区的信道质量不满足所述提前上行同步过程的触发条件;所述提前上行同步过程所基于的CFRA资源不可用;存在L1测量结果优于所述LTM候选小区的其他LTM候选小区;以及满足触发向服务小区发起随机接入的事件。
- 根据权利要求80至82中任一项所述的设备,其特征在于,如果所述第一随机接入资源为两步CBRA资源,则所述第一终端设备发送的消息A的净荷中包含以下信息中的一种或多种:所述LTM候选小区为所述第一终端设备配置的小区无线网络临时标识C-RNTI;服务小区的标识;服务分布式单元DU的标识;以及服务中心单元CU的标识。
- 根据权利要求80至82中任一项所述的设备,其特征在于,如果所述第一随机接入资源为四步 CBRA资源,则所述第一终端设备发送的消息3中包含以下信息中的一种或多种:所述LTM候选小区为所述第一终端设备配置的C-RNTI;服务小区的标识;服务DU的标识;以及服务CU的标识。
- 一种网络设备,其特征在于,包括:发送单元,用于向第一终端设备发送第一配置信息,所述第一配置信息用于确定第一条件,所述第一条件用于确定是否向第一层1/层2触发的移动性LTM候选小区发起提前上行同步过程;其中,所述第一条件与以下中的一种或多种关联:LTM候选小区的L1测量结果;终端设备的位置;第一定时器;终端设备的移动速度;以及所述LTM候选小区的定时提前TA值是否已知。
- 根据权利要求93所述的设备,其特征在于,所述第一条件与终端设备的位置关联,包括:所述第一条件与终端设备的当前位置和/或终端设备的参考位置关联。
- 根据权利要求94所述的设备,其特征在于,所述参考位置为以下中的一种:终端设备接收到LTM候选小区的TA时所处的位置;以及终端设备执行LTM时所处的位置。
- 根据权利要求94或95所述的设备,其特征在于,所述第一条件包括以下中的一种或多种:所述当前位置与所述参考位置之间的位置差大于或等于第一阈值;以及所述当前位置对应的信号质量与所述参考位置对应的信号质量之间的差值大于或等于第二阈值。
- 根据权利要求96所述的设备,其特征在于,所述信号质量基于终端设备测量得到的所述LTM候选小区的参考信号接收功率RSRP,和/或服务小区的RSRP确定。
- 根据权利要求93至97中任一项所述的设备,其特征在于,所述第一条件与所述第一定时器关联,包括:所述第一条件与所述第一定时器以及终端设备接收到LTM候选小区的TA值的时刻关联。
- 根据权利要求98所述的设备,其特征在于,所述第一条件包括:第一时长大于或等于所述第一定时器的定时时长;其中,所述第一时长基于终端设备接收到LTM候选小区的TA值的时刻与当前时刻之间的时间差确定。
- 根据权利要求93至99中任一项所述的设备,其特征在于,所述第一条件与终端设备的移动速度关联,包括:所述第一条件与终端设备在接收到LTM候选小区的TA值之后的移动速度关联。
- 根据权利要求100所述的设备,其特征在于,所述第一条件包括:终端设备接收到LTM候选小区的TA值后的移动速度或平均移动速度大于或等于第三阈值。
- 根据权利要求93至101中任一项所述的设备,其特征在于,若所述第一条件与所述LTM候选小区的TA值是否已知关联,所述第一配置信息包括第一类型的配置信息,所述第一类型的配置信息用于指示第一小区和第二小区之间的TA的关系;其中:所述第一小区和所述第二小区均为所述第一终端设备的LTM候选小区;或者,所述第一小区为所述第一终端设备的服务小区,所述第二小区为所述第一终端设备的LTM候选小区。
- 根据权利要求102所述的设备,其特征在于,所述第一小区和第二小区之间的TA的关系包括以下中的一种或多种:所述第一小区和所述第二小区是否属于同一定时提前组TAG;以及所述第一小区和所述第二小区之间的TA的偏移量。
- 根据权利要求102或103所述的设备,其特征在于,若所述第一配置信息包括所述第一类型的配置信息,且所述第一小区的TA值为已知的,那么所述LTM候选小区的TA值为已知的。
- 根据权利要求93至104中任一项所述的设备,其特征在于,若所述第一条件与所述LTM候选小区的TA值是否已知关联,所述第一配置信息包括第二类型的配置信息,所述第二类型的配置信息用于指示所述LTM候选小区的TA值为0。
- 根据权利要求93至105中任一项所述的设备,其特征在于,所述第一配置信息承载在无线资源控制RRC配置消息中。
- 根据权利要求93至106中任一项所述的设备,其特征在于,所述第一终端设备的多个LTM候选小区满足所述第一条件,所述第一LTM候选小区基于以下中的一种或多种从所述多个LTM候选 小区中确定:所述多个LTM候选小区的L1测量结果;以及所述多个LTM候选小区是否配置了终端设备专属基于非竞争的随机接入CFRA资源。
- 根据权利要求107所述的设备,其特征在于:所述第一LTM候选小区为所述多个LTM候选小区中的L1测量结果最好的LTM候选小区;或者,所述第一LTM候选小区为所述多个LTM候选小区中的配置了终端设备专属CFRA资源的LTM候选小区。
- 根据权利要求93至108中任一项所述的设备,其特征在于,所述网络设备向第一终端设备发送第一配置信息,包括:在条件LTM过程中,所述网络设备向所述第一终端设备发送所述第一配置信息。
- 一种网络设备,其特征在于,包括:第一接收单元,用于接收第一终端设备发送的随机接入请求,所述随机接入请求用于与层1/层2触发的移动性LTM候选小区提前进行上行同步,所述随机接入请求与第一随机接入资源关联,所述第一随机接入资源为以下中的一种:基于非竞争的随机接入CFRA资源;两步基于竞争的随机接入CBRA资源;以及四步CBRA资源。
- 根据权利要求110所述的设备,其特征在于:如果所述网络设备为所述第一终端设备配置了第一CFRA资源和第一CBRA资源,则所述第一CFRA资源的优先级高于所述第一CBRA资源;或者,如果所述网络设备为所述第一终端设备配置了第一CFRA资源和第一CBRA资源,则所述第一CBRA资源在所述第一CFRA资源不可用的情况下使用。
- 根据权利要求110或111所述的设备,其特征在于,所述设备还包括:发送单元,用于向所述第一终端设备发送第一指示信息,所述第一指示信息用于指示是否允许所述第一终端设备发起基于CBRA的提前上行同步过程。
- 根据权利要求110至112中任一项所述的设备,其特征在于,所述设备还包括:第二接收单元,用于接收所述第一终端设备发送的第一请求,所述第一请求用于请求所述网络设备分配用于提前上行同步过程的随机接入信道RACH资源或终端设备专属CFRA资源。
- 根据权利要求113所述的设备,其特征在于,所述第一请求是在第二条件不满足的情况下触发的,所述第二条件与以下中的一种或多种关联:所述网络设备发送的第一资源配置信息;以及所述第一终端设备的LTM候选小区的波束测量结果。
- 根据权利要求114所述的设备,其特征在于,所述第二条件包括:所述第一资源配置信息包含终端设备专属CFRA资源;以及一个或多个同步信号块SSB的测量结果大于或等于第四阈值;其中,所述一个或多个SSB与所述第一资源配置信息包含的CFRA资源关联。
- 根据权利要求113至115中任一项所述的设备,其特征在于,所述第一请求包括以下信息中的一种或多种:所述LTM候选小区的索引;SSB索引;非补充上行链路NUL或补充上行链路SUL的指示信息;所述LTM候选小区的部分或全部波束的测量结果;以及所述LTM候选小区的小区测量结果。
- 根据权利要求110至112中任一项所述的设备,其特征在于,所述第一随机接入资源为所述网络设备发送的第一资源配置信息中的终端设备专属CFRA资源。
- 根据权利要求117所述的设备,其特征在于:所述第一资源配置信息包括终端设备专属CFRA资源,所述终端设备专属CFRA资源关联一个或多个SSB,所述一个或多个SSB中的第一SSB的测量结果大于或等于第四阈值,所述第一随机接入资源为所述第一SSB关联的终端设备专属CFRA资源;或者,所述第一资源配置信息包括终端设备专属CFRA资源,所述终端设备专属CFRA资源关联一个或多个SSB,且所述一个或多个SSB的测量结果均小于第四阈值,所述第一随机接入资源为所述一个或多个SSB中的第二SSB关联的终端设备专属CFRA资源,所述第二SSB由所述第一终端设备从所述 一个或多个SSB中随机选择。
- 根据权利要求113至118中任一项所述的设备,其特征在于,所述第一终端设备仅允许发起基于CFRA的提前上行同步过程。
- 根据权利要求110至119中任一项所述的设备,其特征在于,如果第三条件满足,则所述第一终端设备与所述LTM候选小区的提前上行同步过程停止;其中,所述第三条件包括以下中的一种或多种:所述LTM候选小区的信道质量不满足所述提前上行同步过程的触发条件;所述提前上行同步过程所基于的CFRA资源不可用;存在L1测量结果优于所述LTM候选小区的其他LTM候选小区;以及满足触发向服务小区发起随机接入的事件。
- 根据权利要求110至112中任一项所述的设备,其特征在于,如果所述第一随机接入资源为两步CBRA资源,则所述第一终端设备发送的消息A的净荷中包含以下信息中的一种或多种:所述LTM候选小区为所述第一终端设备分配的小区无线网络临时标识C-RNTI;服务小区的标识;服务分布式单元DU的标识;以及服务中心单元CU的标识。
- 根据权利要求110至112中任一项所述的设备,其特征在于,如果所述第一随机接入资源为四步CBRA资源,则所述第一终端设备发送的消息3中包含以下信息中的一种或多种:所述LTM候选小区为所述第一终端设备分配的C-RNTI;服务小区的标识;服务DU的标识;以及服务CU的标识。
- 一种终端设备,其特征在于,包括存储器和处理器,所述存储器用于存储程序,所述处理器用于调用所述存储器中的程序,以使所述终端设备执行如权利要求1-31中任一项所述的方法。
- 一种网络设备,其特征在于,包括存储器和处理器,所述存储器用于存储程序,所述处理器用于调用所述存储器中的程序,以使所述网络设备执行如权利要求32-61中任一项所述的方法。
- 一种装置,其特征在于,包括处理器,用于从存储器中调用程序,以使所述装置执行如权利要求1-31中任一项所述的方法。
- 一种装置,其特征在于,包括处理器,用于从存储器中调用程序,以使所述装置执行如权利要求32-61中任一项所述的方法。
- 一种芯片,其特征在于,包括处理器,用于从存储器调用程序,使得安装有所述芯片的设备执行如权利要求1-31中任一项所述的方法。
- 一种芯片,其特征在于,包括处理器,用于从存储器调用程序,使得安装有所述芯片的设备执行如权利要求32-61中任一项所述的方法。
- 一种计算机可读存储介质,其特征在于,其上存储有程序,所述程序使得计算机执行如权利要求1-31中任一项所述的方法。
- 一种计算机可读存储介质,其特征在于,其上存储有程序,所述程序使得计算机执行如权利要求32-61中任一项所述的方法。
- 一种计算机程序产品,其特征在于,包括程序,所述程序使得计算机执行如权利要求1-31中任一项所述的方法。
- 一种计算机程序产品,其特征在于,包括程序,所述程序使得计算机执行如权利要求32-61中任一项所述的方法。
- 一种计算机程序,其特征在于,所述计算机程序使得计算机执行如权利要求1-31中任一项所述的方法。
- 一种计算机程序,其特征在于,所述计算机程序使得计算机执行如权利要求32-61中任一项所述的方法。
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022116093A1 (zh) * | 2020-12-03 | 2022-06-09 | Oppo广东移动通信有限公司 | 无线通信方法和设备 |
| US20220361071A1 (en) * | 2019-11-07 | 2022-11-10 | Nokia Technologies Oy | Conditional Handover for Wireless Networks |
| WO2023107220A1 (en) * | 2021-12-09 | 2023-06-15 | Qualcomm Incorporated | Conditional handover based on beam specific measurements |
-
2023
- 2023-08-14 CN CN202380100799.9A patent/CN121816784A/zh active Pending
- 2023-08-14 WO PCT/CN2023/112932 patent/WO2025035361A1/zh active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220361071A1 (en) * | 2019-11-07 | 2022-11-10 | Nokia Technologies Oy | Conditional Handover for Wireless Networks |
| WO2022116093A1 (zh) * | 2020-12-03 | 2022-06-09 | Oppo广东移动通信有限公司 | 无线通信方法和设备 |
| WO2023107220A1 (en) * | 2021-12-09 | 2023-06-15 | Qualcomm Incorporated | Conditional handover based on beam specific measurements |
Non-Patent Citations (3)
| Title |
|---|
| ERDEM BALA, RAKUTEN SYMPHONY: "Discussion on RACH-less Handover for L1/L2 Triggered Mobility", 3GPP DRAFT; R2-2211520; TYPE DISCUSSION, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Toulouse, FR; 20221114 - 20221118, 3 November 2022 (2022-11-03), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052215627 * |
| ERDEM BALA, RAKUTEN SYMPHONY: "Performance Enhancements for L1/L2 Triggered Mobility", 3GPP DRAFT; R2-2211652; TYPE DISCUSSION, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Toulouse, FR; 20221114 - 20221118, 3 November 2022 (2022-11-03), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052215756 * |
| LI-CHUAN TSENG, MEDIATEK INC.: "Procedures of L1L2-triggered Mobility", 3GPP DRAFT; R2-2211195; TYPE DISCUSSION, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Toulouse, FR; 20221114 - 20221118, 4 November 2022 (2022-11-04), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052215307 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120075924A (zh) * | 2025-03-07 | 2025-05-30 | 深圳传音控股股份有限公司 | 处理方法、通信设备及存储介质 |
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