WO2026025317A1 - 无线通信的方法、终端设备和网络设备 - Google Patents
无线通信的方法、终端设备和网络设备Info
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- WO2026025317A1 WO2026025317A1 PCT/CN2024/108655 CN2024108655W WO2026025317A1 WO 2026025317 A1 WO2026025317 A1 WO 2026025317A1 CN 2024108655 W CN2024108655 W CN 2024108655W WO 2026025317 A1 WO2026025317 A1 WO 2026025317A1
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- synchronization
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
Definitions
- This application relates to the field of communication technology, and more specifically, to a wireless communication method, terminal device, and network device.
- LTM Layer 1/L2-triggered mobility
- This application provides a wireless communication method, terminal device, and network device. The various aspects covered by this application are described below.
- a wireless communication method comprising: a terminal device executing an LTM procedure, wherein the LTM procedure includes advance synchronization for a first node and a second node, the advance synchronization including uplink synchronization and/or downlink synchronization.
- a wireless communication method comprising: a network device instructing a terminal device to perform an LTM procedure, wherein the LTM procedure includes advance synchronization for a first node and a second node, the advance synchronization including uplink synchronization and/or downlink synchronization.
- a terminal device comprising: a processing unit for executing an LTM process, wherein the LTM process includes advance synchronization for a first node and a second node, the advance synchronization including uplink synchronization and/or downlink synchronization.
- a network device comprising: a processing unit for instructing a terminal device to execute an LTM process, wherein the LTM process includes advance synchronization for a first node and a second node, the advance synchronization including uplink synchronization and/or downlink synchronization.
- a terminal device including a transceiver, a memory, and a processor, wherein the memory is used to store a program, and the processor is used to invoke the program in the memory and control the transceiver to receive or send signals so that the terminal device performs the method as described in the first aspect.
- a network device including a transceiver, a memory, and a processor, wherein the memory is used to store a program, and the processor is used to invoke the program in the memory and control the transceiver to receive or transmit signals so that the network device performs the method as described in the second aspect.
- a seventh aspect provides an apparatus including a processor for calling a program from a memory to cause the apparatus to perform the method as described in any one of the first or second aspects.
- a chip including a processor for calling a program from memory to cause a device having the chip mounted to perform the method as described in the first or second aspect.
- a computer-readable storage medium having a program stored thereon that causes a computer to perform the method as described in the first or second aspect.
- a tenth aspect provides a computer program product, including a program that causes a computer to perform the method as described in the first or second aspect.
- a computer program is provided that causes a computer to perform the method as described in the first or second aspect.
- the LTM process executed by the terminal device includes advance synchronization of uplink and/or downlink for the first node and the second node, so that the LTM process can be applied to scenarios in which the terminal device can connect to multiple nodes at the same time.
- Figure 1 is a system architecture example diagram of a wireless communication system applicable to embodiments of this application.
- FIG. 2 is a schematic diagram of the LTM process.
- Figure 3 is a flowchart illustrating the wireless communication method according to an embodiment of this application.
- Figure 4 is a schematic diagram of the structure of the terminal device according to an embodiment of this application.
- Figure 5 is a schematic diagram of the structure of a network device according to an embodiment of this application.
- Figure 6 is a schematic diagram of an apparatus applicable to embodiments of this application.
- FIG 1 is an example diagram of the system architecture of a wireless communication system 100 to which embodiments of this application can be applied.
- 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 be a special...
- the system provides network coverage over a defined geographical area and enables communication with terminal devices 120 located within that coverage area.
- Terminal devices 120 can access a network, such as a wireless network, via network device 110.
- the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity; this embodiment does not limit the scope of the application.
- the technical solutions of the embodiments of this application can be applied to various communication systems, such as: fifth generation (5G) systems, new radio (NR), long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, etc.
- 5G fifth generation
- NR new radio
- LTE long term evolution
- TDD time division duplex
- the technical solutions provided in this application can also be applied to future communication systems, such as sixth generation mobile communication systems, satellite communication systems, etc.
- the terminal device in this application embodiment can 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.
- UE user equipment
- MS mobile station
- MT mobile terminal
- remote station remote terminal
- mobile device user terminal
- terminal wireless communication device
- user agent user agent
- user device can 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 this application embodiment can 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 connectivity, vehicle-mounted device, etc.
- the terminal devices in the embodiments of this application can be mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc.
- the terminal device can be used to act as a base station.
- the terminal device can act as a scheduling entity, providing sidelink signals between terminal devices in vehicle-to-everything (V2X) or device-to-device (D2D) applications.
- V2X vehicle-to-everything
- D2D device-to-device
- cellular phones and cars communicate with each other using sidelink signals.
- Cellular phones and smart home devices communicate with each other without needing to relay communication signals through base stations.
- the network device in this application embodiment can be a device for communicating with terminal devices.
- This network device can be, for example, an access network device or a wireless access network device.
- the network device can be a base station.
- the term "base station” can broadly encompass various names such as, or be replaced by, the following: NodeB, evolved NodeB (eNB), next-generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), 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.
- a 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.
- Cell handover aims to improve the continuity of service provided by a communication system to terminal devices.
- a terminal device moves from one cell (also called the source cell) to another cell (also called the target cell), it needs to hand over to the new cell to maintain communication.
- cell handover can include two mechanisms: traditional handover and conditional handover (CHO).
- the network device will send a handover command to the terminal device at an appropriate time, such as when the signal measurement result of the terminal device in the serving cell is below a threshold, to instruct the terminal device to perform cell handover.
- This handover command can be, for example, a radio resource control (RRC) reconfiguration message that includes synchronization reconfiguration information.
- RRC radio resource control
- network devices can configure one or more candidate cells, along with associated conditional handover events, to the terminal device. These conditional handover events can also be called conditional handover trigger conditions. Accordingly, the terminal device can determine whether the conditional handover event is met based on signal measurement results from the candidate cells. If the terminal device determines that a candidate cell meets the conditional handover event, it can initiate random access to that candidate cell.
- the 3rd generation partnership project (3GPP) supports the LTM (Last Time To Meet) process.
- LTM Long Time To Meet
- the LTM process can include the LTM preparation phase, the LTM execution phase, and the LTM completion phase.
- Steps 210 and 230 in Figure 2 belong to the LTM preparation stage.
- the terminal device reports the measurement results to the network device.
- These measurement results can be layer 3 (L3) measurements.
- the network device can then determine whether to initiate an LTM process and trigger candidate cell preparation based on the measurement results reported by the terminal device.
- the network device sends an RRC message to the terminal device, including the LTM candidate cell configuration (or LTM candidate configuration, LTM configuration).
- the network device can send an RRC reconfiguration message to the terminal device to... Instructions for LTM candidate cell configuration.
- the LTM candidate cell configuration sent by the network device to the terminal device may include configuration information for one or more candidate cells, such as configuration information for one or more primary cells, and configuration information for one or more primary-secondary cells or one or more secondary cells.
- This configuration information is used by the terminal device to perform early synchronization processes, such as early uplink synchronization and/or early downlink synchronization.
- step 230 after receiving the LTM candidate cell configuration, the terminal device stores the LTM candidate cell configuration and sends an RRC reconfiguration complete message to the network device.
- the terminal device after the terminal device completes the LTM preparation phase in steps 240a and 240b, it can perform synchronization with the candidate cell in advance to shorten the interruption latency during the handover process.
- This process can be regarded as an early synchronization phase, or an early synchronization phase.
- the synchronization may include downlink synchronization (see step 240a) and/or uplink synchronization (see step 240b).
- Steps 250, 260 and 270 in Figure 2 belong to the LTM execution phase, with step 270 being optional.
- step 250 the terminal device performs Layer 1 (L1) measurements on each candidate cell and reports the L1 measurement results to the network device.
- the network device can determine the target cell based on the L1 measurement results.
- the network device sends a cell switch command to the terminal device, instructing the terminal device to switch to the target cell.
- this cell switch command can be carried in the medium access control element (MAC CE).
- the terminal device After receiving the cell switch command, the terminal device detaches from the source cell and applies the configuration of the target cell, i.e., the target configuration.
- the terminal device can still execute step 270 during the LTM execution phase.
- the terminal device executes the random access channel (RACH) procedure, that is, initiates random access to the target cell.
- RACH random access channel
- Step 280 in Figure 2 belongs to the LTM completion stage.
- the terminal device indicates that LTM is complete. For example, the terminal device may send an indication that LTM has been successfully completed to the target cell.
- the terminal device can perform synchronization with the candidate cell in advance before receiving the cell handover command in step 260, thereby shortening the interruption latency during the handover process.
- the process of the terminal device performing uplink synchronization for the candidate cell in advance can include the following two methods: 1) The terminal device calculates the TA value of the candidate cell based on the TA value of the current serving cell, for example, by estimating the TA value of the candidate cell based on the difference between the downlink reference signal delays of the serving cell and the candidate cell; 2) The serving cell triggers the terminal device to send a preamble to the candidate cell via a physical downlink control channel (PDCCH) order.
- PDCCH physical downlink control channel
- the candidate cell upon receiving the preamble sent by the terminal device, calculates the TA value of the terminal device in that cell and informs the serving cell of the TA value and its associated timing advance group (TAG) identifier, so that the serving cell can include it in the cell handover command. If the advance synchronization process is successfully executed, then step 270 mentioned above does not need to be executed again. Therefore, this process can also be called RACH-less LTM. If the advance synchronization process fails due to some reason, such as the location of the terminal device moving or signal delay, and the terminal device does not obtain the TA value of the target cell, then step 270 mentioned above needs to be executed.
- TAG timing advance group
- the process of the terminal device performing downlink synchronization for candidate cells in advance includes the terminal device performing downlink measurements based on the measurement configuration information of the network device.
- CA Carrier Aggregation
- CCs component carriers
- SCells secondary cells
- a terminal device may simultaneously connect to two cell sets: a master cell group (MCG) and a secondary cell group (SCG).
- MCG master cell group
- SCG secondary cell group
- Each MCG includes at least one primary cell (PCell), and optionally, one or more secondary cells (SCells).
- SCells secondary cells
- SCG includes one primary and one secondary cell (PSCell), and optionally, one or more SCells.
- MN master node
- SCG secondary node
- the introduction of the LTM procedure can reduce latency during handover.
- the LTM procedure needs to be applicable to scenarios where the terminal device can connect to multiple nodes simultaneously. Therefore, this application embodiment improves the pre-synchronization scheme in the LTM procedure.
- the LTM procedure executed by the terminal device includes actions for the first node and the second node.
- the advance synchronization enables the LTM process to be applied in scenarios where terminal devices can connect to multiple nodes simultaneously. For example, in a DC scenario, in addition to the advance synchronization of the primary cell, the primary and secondary cells are also synchronized in advance; or, in a CA scenario, in addition to the advance synchronization of the primary cell, the secondary cells are also synchronized in advance.
- Figure 3 is a flowchart illustrating a wireless communication method provided in an embodiment of this application.
- the method 300 shown in Figure 3 can be executed by a terminal device and a network device.
- method 300 may include some or all of the following steps.
- step 310 the network device instructs the terminal device to perform the LTM procedure.
- step 320 the terminal device executes the LTM process.
- the LTM process includes advance synchronization for the first and second nodes, where advance synchronization includes uplink synchronization and/or downlink synchronization.
- the first node includes one or more of the following: primary cell, primary-secondary cell, secondary cell; and/or, the second node includes one or more of the following: primary-secondary cell, secondary cell.
- the second node may also include a transmission and receiving point (TRP), wherein the TRP may belong to the same cell as the first node, or to a different cell.
- TRP transmission and receiving point
- the first node can be the primary cell
- the second node can be a primary or secondary cell.
- the first node can be the primary cell and the second node can be the secondary cell; or, the first node can be both the primary and secondary cells and the second node can be the secondary cell.
- the terminal device can perform advance synchronization for two or more nodes in the LTM process.
- the first node may include one or more primary cells, and the second node may include one or more primary and secondary cells; or, for another example, the first node may include one or more primary cells, and the second node may include one or more secondary cells.
- the terminal device can perform advance synchronization on the first node and all second nodes associated with the first node, or it can perform advance synchronization on the first node and some of the second nodes associated with the first node.
- the terminal device can perform advance synchronization on the primary cell and all secondary cells associated with the primary cell; or, the terminal device can perform advance synchronization on the primary cell and one of the secondary cells associated with the primary cell.
- the advance synchronization of the first and second nodes can be performed in parallel. That is, the terminal device can simultaneously perform advance synchronization with both the first and second nodes. For example, the terminal device can simultaneously perform advance synchronization with both the primary and secondary cells, or simultaneously with both the primary and secondary cells. Alternatively, if simultaneous synchronization of the first and second nodes is not supported, the terminal device can perform advance synchronization with the first and second nodes sequentially based on their priority order.
- the terminal device can first synchronize with TRP11, and then synchronize with TRP21.
- method 300 may further include the terminal device receiving first information sent by the network device.
- This first information is used for advance synchronization of the first node.
- This first information may also be referred to as a first configuration. The first information will be described in detail below.
- the first information includes one or more of the following: first resource information for uplink synchronization of the first node; second resource information for downlink synchronization of the first node; power information for uplink synchronization of the first node; and identification information related to the first node.
- the first resource information used for uplink synchronization of the first node may include, for example, RACH resources and/or resources for uplink reference signals such as sounding reference signals (SRS).
- RACH resources may include, for example, SSB, MSG1 repetition number, and PRACH mask index.
- SRS resources may include, for example, resources for SRS and/or SRS sets.
- Secondary resource information used for downlink synchronization of the first node may include, for example, downlink reference signal resources, such as one or more of the following: transmission configuration indication (TCI) state, synchronization signal block/physical broadcast channel block (SS/PBCH block, SSB), channel state information reference signal (CSI-RS) resources, tracking reference signal (TRS) resources, and SRS resources.
- TCI transmission configuration indication
- SS/PBCH block synchronization signal block/physical broadcast channel block
- CSI-RS channel state information reference signal
- TRS tracking reference signal
- SRS resources may include, for example, SRS and/or SRS set resources.
- the TCI state may be for uplink or downlink, or for both uplink and downlink simultaneously.
- the power information used for uplink synchronization of the first node could be, for example, the power used to transmit the preamble during the RACH process.
- the identification information associated with the first node could be, for example, the identifier of the first node, such as its cell identifier or candidate configuration identifier, which is a different identifier than its cell identifier that is reassigned to the first node when it is selected as a candidate cell; or, the identification information associated with the first node could also be resource information related to the resources corresponding to the first node, such as the physical cell identifier.
- the resources include (physical cell identifier, PCI), TRP identifier, control-resource set (CORESET), CORESET resource pool, carrier, and reference signal resources.
- the reference signal may include, for example, SRS, TRS, SSB, and CSI-RS.
- the terminal device can use the first information to perform uplink synchronization and/or downlink synchronization for the first node.
- uplink synchronization may include initiating a random access procedure to the first node or performing SRS transmission based on SRS configuration information sent by the network device.
- Downlink synchronization may include determining the downlink reference signal based on the first information and then measuring or tracking the downlink reference signal accordingly.
- the network device can then indicate the result of the uplink synchronization performed by the terminal device, such as the TA value, to the terminal device in a subsequent transmitted message.
- method 300 may further include the terminal device receiving second information sent by the network device.
- This second information is used for advance synchronization of the second node.
- This second information may also be referred to as a second configuration. The second information is described in detail below.
- the second information includes one or more of the following: first resource information for uplink synchronization of the second node; second resource information for downlink synchronization of the second node; power information for uplink synchronization of the second node; identification information related to the second node; and status information of the second node.
- the first resource information used for uplink synchronization of the second node may include, for example, RACH resources and/or uplink reference signal resources such as SRS.
- RACH resources may include, for example, SSB, MSG1 repetition number, and PRACH MASK index.
- SRS resources may include, for example, SRS and/or SRS set resources.
- Secondary resource information used for downlink synchronization of the second node may include, for example, resources for downlink reference signals, such as one or more of the following: TCI state, SSB, CSI-RS resources, TRS resources, and SRS resources.
- SRS resources may include, for example, resources for SRS and/or SRS sets.
- the power information used for uplink synchronization of the second node could be, for example, the power used to transmit the preamble during the RACH process.
- the identification information related to the second node can be, for example, the second node's identifier, such as its cell identifier or candidate configuration identifier.
- This candidate configuration identifier is a different identifier than the cell identifier that is reassigned to the second node when it is selected as a candidate cell.
- the second node being a TRP (Telematics Resource Repository)
- it can also be the identifier of the cell associated with the TRP.
- the identification information related to the second node can also be resource information associated with the resources corresponding to the second node, such as PCI, TRP identifier, CORESET, CORESET resource pool, carrier, reference signal resources, etc.
- the reference signal includes, for example, SRS, TRS, SSB, CSI-RS, etc.
- the TCI status can be for uplink or downlink, or for both uplink and downlink simultaneously.
- the status information of the second node may include, for example, its active or deactivated status.
- the terminal device can use the second information to perform uplink and/or downlink synchronization for the second node.
- uplink synchronization operations include initiating a random access procedure to the second node or performing SRS transmission based on SRS configuration information sent by the network device.
- Downlink synchronization operations include determining the downlink reference signal based on the second information and then performing corresponding measurements or tracking of the downlink reference signal.
- the network device can then indicate the result of the uplink synchronization performed by the terminal device, such as the TA value, to the terminal device in a subsequent transmitted message.
- the network device may optionally send cell indication information to the terminal device.
- This cell indication information is used to indicate whether the uplink synchronization process, or random access process, is initiated for a candidate cell or a serving cell.
- the second information can be transmitted independently of the first information; or, the second information can be carried within the first information, i.e., the second information is carried within the first information.
- a network device can trigger two pieces of information, namely the first information and the second information, to instruct the terminal device to perform advance synchronization for the first node and the second node, respectively, or it can trigger a single piece of information, namely the first information, to instruct the terminal device to perform advance synchronization for the first node and the second node.
- a synchronization indication message can be used to instruct the terminal device to perform advance synchronization for the second node.
- the second information may include the synchronization indication message; or, the first information may include the synchronization indication message; or, the synchronization indication message may be transmitted independently of the first and second information. Instructing the terminal device to perform advance synchronization for the second node using this synchronization indication message allows for more flexible triggering of the advance synchronization of the second node.
- this synchronization indication information occupies 1 bit, which indicates whether the terminal device needs to perform advance synchronization for the second node when advance synchronization for the first node is triggered. For example, if the bit is 1, it means that advance synchronization for both the first and second nodes is performed, and if the bit is 0, it means that advance synchronization for the first node is performed only.
- the network device may not send the synchronization indication information to the terminal device.
- the LTM procedure may include performing advance synchronization for the second node by default, in addition to performing advance synchronization for the first node. This way, advance synchronization for both the first and second nodes can be triggered simultaneously without incurring additional signaling overhead.
- the network device may not send the first and/or second information to the terminal device.
- the terminal device can perform advance synchronization for the second node based on the resource information in the LTM candidate cell configuration received during the aforementioned LTM preparation phase.
- implicit instructions can be used to instruct the terminal device to perform advance synchronization for the first node, which also requires...
- the first and second nodes may optionally share a candidate configuration identifier.
- candidate configuration identifier 000 indicates the primary and secondary cells
- candidate configuration identifier 001 indicates the primary and secondary cells, and so on.
- the terminal device can determine another cell that needs to be synchronized with the primary cell simultaneously.
- Network devices can send the aforementioned first and/or second information to terminal devices during the LTM preparation phase, the advance synchronization phase, or the LTM execution phase.
- the first and/or second information can be carried in one or more of the following ways: MAC CE; downlink control information (DCI); RRC signaling; cell handover command.
- the above describes how a terminal device performs advance synchronization for a first node and a second node in the LTM process based on instructions from a network device.
- the terminal device may also trigger advance synchronization of the first node and/or the second node based on conditions.
- method 300 may further include, upon meeting predetermined conditions, the terminal device determining to perform advance synchronization for the first node and the second node.
- the predetermined conditions may be determined based on one or more of the following: signal measurement results; the location of the terminal device; and time information. Alternatively, the predetermined conditions may also be determined based on the internal implementation of the terminal device. For example, if the measured signal quality of the current serving cell is less than a corresponding threshold, advance synchronization for the first node and/or the second node may be performed; as another example, if the measured signal quality of the first node and/or the second node is greater than a corresponding threshold, advance synchronization for the first node and/or the second node may be performed; as another example, if the terminal device is located in a designated area, advance synchronization for the first node and/or the second node may be performed; as another example, if the current time falls within a designated time period, advance synchronization for the first node and/or the second node may be performed.
- the designated time period may be pre-agreed or sent by the network device.
- This predetermined condition can be combined with an instruction from the network device to trigger the terminal device to perform advance synchronization for the first node and the second node. For example, in some implementations, the terminal device determines to perform advance synchronization for the first node based on first information sent by the network device, and determines to perform advance synchronization for the second node if the predetermined condition is met. Specifically, the terminal device can determine whether to trigger advance synchronization for the second node based on the predetermined condition after receiving the first information or after the advance synchronization for the first node is completed.
- the predetermined conditions may be, for example, pre-agreed upon; or, the network device may send information about the predetermined conditions to the terminal device, which are used to trigger advance synchronization for the first node and/or the second node.
- the first node is the primary cell
- the second node is the secondary cell.
- the terminal device receives first information sent by the network device.
- This first information includes: identification information related to the primary cell, such as the primary cell's identification information or information about transmission resources associated with the primary cell; first resource information required for the primary cell's uplink synchronization process, such as RACH resources or SRS resources; and second resource information required for the primary cell's downlink synchronization process, such as configuration information for TCI status, SSB, CSI-RS, TRS, and SRS.
- the terminal device can also receive second information sent by the network device.
- This second information includes: identification information related to the primary and secondary cells, such as the primary and secondary cell's identification information or information about transmission resources associated with the primary and secondary cells; first resource information required for the primary and secondary cell's uplink synchronization process, such as RACH resources or SRS resources; and second resource information required for the primary and secondary cell's downlink synchronization process, such as configuration information for TCI status, SSB, CSI-RS, TRS, and SRS.
- the second information can be independent of the first information, or the second information can be carried within the first information.
- the terminal device may also receive cell indication information, condition indication information, etc., sent by the network device.
- the terminal device performs uplink synchronization for the primary cell and the primary and secondary cells, initiates uplink random access procedures for the primary cell and the primary and secondary cells, and performs downlink synchronization for the primary cell and the primary and secondary cells, and performs corresponding measurements on the downlink reference signal.
- the first node is the primary cell
- the second node is the secondary cell associated with the primary cell.
- the terminal device receives first information sent by the network device.
- This first information includes: identification information related to the primary cell, such as the primary cell's identification information or information about transmission resources associated with the primary cell; first resource information required for the primary cell's uplink synchronization process, such as RACH resources or SRS resources; and second resource information required for the primary cell's downlink synchronization process, such as configuration information for TCI status, SSB, CSI-RS, TRS, and SRS.
- the terminal device can also receive second information sent by the network device.
- This second information includes: identification information related to the secondary cell, such as the secondary cell's identification information or information about transmission resources associated with the secondary cell; first resource information required for the secondary cell's uplink synchronization process, such as RACH resources or SRS resources; and second resource information required for the secondary cell's downlink synchronization process, such as configuration information for TCI status, SSB, CSI-RS, TRS, and SRS.
- the second information can be independent of the first information, or the second information can be carried within the first information.
- the terminal device may also receive cell indication information, condition indication information, etc., sent by the network device.
- the terminal device performs uplink synchronization for the primary cell and the secondary cell associated with the primary cell, initiates uplink random access procedures to the primary cell and the secondary cell, and performs downlink synchronization for the primary cell and the secondary cell, and performs corresponding measurements on the downlink reference signal.
- the first node is the primary cell
- the second node is the TRP associated with that primary cell.
- the terminal device receives the network.
- the terminal device receives first information sent by the network device, which includes: identification information related to the primary cell, such as the identification information of the primary cell or information on transmission resources associated with the primary cell; first resource information required for the uplink synchronization process of the primary cell, such as RACH resources or SRS resources; and second resource information required for the downlink synchronization process of the primary cell, such as configuration information of TCI status, SSB, CSI-RS, TRS, SRS, etc.
- the terminal device can also receive second information sent by the network device, which includes: identification information related to the TRP, such as the identification information of the TRP or information on transmission resources associated with the TRP; first resource information required for the uplink synchronization process of the TRP, such as RACH resources or SRS resources; and second resource information required for the downlink synchronization process of the TRP, such as configuration information of TCI status, SSB, CSI-RS, TRS, SRS, etc.
- the second information can be independent of the first information, or the second information can be carried within the first information.
- the terminal device may also receive cell indication information, condition indication information, etc., sent by the network device.
- the terminal device performs uplink synchronization for the main cell and the TRP within the main cell, initiates an uplink random access procedure to the main cell and the TRP, and performs downlink synchronization for the main cell and the TRP, and performs corresponding measurements on the downlink reference signal.
- FIG 4 is a schematic diagram of the structure of a terminal device provided in an embodiment of this application.
- the terminal device 400 shown in Figure 4 may include a processing unit 410.
- the processing unit 410 is used to execute an LTM process, which includes advance synchronization for a first node and a second node, the advance synchronization including uplink synchronization and/or downlink synchronization.
- the first node includes one or more of the following: primary cell, primary-secondary cell, secondary cell; and/or, the second node includes one or more of the following: primary-secondary cell, secondary cell, TRP.
- the terminal device further includes a transceiver unit 420, configured to: receive first information sent by a network device, the first information being used for advance synchronization of the first node.
- the first information includes one or more of the following: first resource information for uplink synchronization of the first node; second resource information for downlink synchronization of the first node; power information for uplink synchronization of the first node; and identification information associated with the first node.
- the transceiver unit 420 is also used to: receive second information sent by the network device, the second information being used for advance synchronization of the second node.
- the second information includes one or more of the following: first resource information for uplink synchronization of the second node; second resource information for downlink synchronization of the second node; power information for uplink synchronization of the second node; identification information associated with the second node; and status information of the second node.
- the second information is transmitted independently of the first information; or, the second information is carried in the first information.
- the second information further includes synchronization indication information, which is used to instruct the terminal device to perform advance synchronization for the second node; or, the first information further includes the synchronization indication information; or, the synchronization indication information is transmitted to the terminal device independently of the first information and the second information; or, the LTM process includes, in the case of performing advance synchronization for the first node, defaulting to performing advance synchronization for the second node.
- the first resource information includes random access channel (RACH) resources and/or sounding reference signal (SRS) resources; and/or, the second resource information includes one or more of the following: TCI state, SSB, CSI-RS resources, TRS resources, and SRS resources.
- RACH random access channel
- SRS sounding reference signal
- the first information and/or the second information are carried in one or more of the following: MAC CE; DCI; RRC signaling; cell handover command.
- the processing unit 410 is further configured to: determine, under predetermined conditions, to perform advance synchronization for the first node and/or the second node.
- the predetermined conditions are determined based on one or more of the following: signal measurement results; the location of the terminal device; and current time information.
- the processing unit 410 is specifically used to: determine, based on the first information sent by the network device, to perform advance synchronization for the first node; and, if the predetermined conditions are met, determine to perform advance synchronization for the second node.
- the transceiver unit 420 is further configured to: receive information about the predetermined conditions sent by the network device.
- the terminal device is used in DC scenarios and/or CA scenarios.
- the processing unit 410 may be a processor 610, and the transceiver unit 420 may be a transceiver 630. Additionally, the terminal device 400 may optionally include a memory 620.
- FIG. 5 is a schematic diagram of the structure of a network device provided in an embodiment of this application.
- the network device 500 shown in Figure 5 includes a transceiver unit 510.
- the transceiver unit 510 is used to instruct a terminal device to execute a Layer 1/Layer 2 triggered Mobility LTM procedure, wherein the LTM procedure includes a procedure for the first... Early synchronization of a node and a second node, wherein the early synchronization includes uplink synchronization and/or downlink synchronization.
- the first node includes one or more of the following: primary cell, primary-secondary cell, secondary cell; and/or, the second node includes one or more of the following: primary-secondary cell, secondary cell, TRP.
- the transceiver unit 510 is specifically used to: send first information to the terminal device, the first information being used for advance synchronization of the first node.
- the first information includes one or more of the following: first resource information for uplink synchronization of the first node; second resource information for downlink synchronization of the first node; power information for uplink synchronization of the first node; and identification information associated with the first node.
- the transceiver unit 510 is specifically used to: send second information to the terminal device, the second information being used for advance synchronization of the second node.
- the second information includes one or more of the following: first resource information for uplink synchronization of the second node; second resource information for downlink synchronization of the second node; power information for uplink synchronization of the second node; identification information associated with the second node; and status information of the second node.
- the second information is transmitted independently of the first information; or, the second information is carried in the first information.
- the second information further includes synchronization indication information, which is used to instruct the terminal device to perform advance synchronization for the second node; or, the first information further includes the synchronization indication information; or, the synchronization indication information is transmitted to the terminal device independently of the first information and the second information; or, the LTM process includes, in the case of performing advance synchronization for the first node, defaulting to performing advance synchronization for the second node.
- the first resource information includes random access channel (RACH) resources and/or sounding reference signal (SRS) resources; and/or, the second resource information includes one or more of the following: TCI state, SSB, CSI-RS resources, TRS resources, and SRS resources.
- RACH random access channel
- SRS sounding reference signal
- the first information and/or the second information are carried in one or more of the following: MAC CE; DCI; RRC signaling; cell handover command.
- the transceiver unit 510 is further configured to: send information about predetermined conditions to the terminal device, the predetermined conditions being used to trigger advance synchronization for the first node and/or the second node.
- the predetermined conditions are determined based on one or more of the following: signal measurement results; the location of the terminal device; and current time information.
- the advance synchronization of the first node is triggered based on the first information sent by the network device, and the advance synchronization of the second node is triggered based on the predetermined conditions.
- the network device is used in DC (Data Center) and/or CA (Data Access Center) scenarios.
- the transceiver unit 510 can be a transceiver 630. Additionally, the network device 500 may optionally include a processor 610 and a memory 620, as shown in Figure 6.
- Figure 6 is a schematic structural diagram of a communication apparatus applicable to embodiments of this application.
- the dashed lines in Figure 6 indicate that the unit or module is optional.
- Apparatus 600 can be used to implement the methods described in the above method embodiments.
- Apparatus 600 may be, for example, a chip, a terminal device, or a network device.
- Apparatus 600 may include one or more processors 610.
- Processor 610 may support apparatus 600 in implementing the methods described in the foregoing method embodiments.
- Processor 610 may be a general-purpose processor or a special-purpose processor.
- processor 610 may be a central processing unit (CPU).
- processor 610 may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
- DSPs digital signal processors
- ASICs application-specific integrated circuits
- FPGAs field-programmable gate arrays
- General-purpose processors may be microprocessors or any conventional processor, etc.
- the apparatus 600 may also include one or more memories 620.
- the memories 620 store programs that can be executed by the processor 610, causing the processor 610 to perform the methods described in the preceding method embodiments.
- the memories 620 may be independent of the processor 610 or integrated within the processor 610.
- the device 600 may also include a transceiver 630.
- the processor 610 can communicate with other devices or chips via the transceiver 630.
- the processor 610 can send and receive data with other devices or chips via the transceiver 630.
- the communication system includes the terminal device and network device described above. In some implementations, the system further includes other devices that interact with the terminal device and network device.
- This application also provides a computer-readable storage medium for storing a program.
- This computer-readable storage medium can be applied to a terminal device or network device provided in this application, and the program causes a computer to execute the methods performed by the terminal device or network device in various embodiments of this application.
- the application also provides a computer program product.
- the computer program product includes a program.
- This computer program product can be applied to a terminal device or network device provided in this application embodiment, and the program causes a computer to execute the methods performed by the terminal device or network device in the various embodiments of this application.
- This application also provides a computer program.
- This computer program can be applied to the terminal device or network device provided in this application, and the computer program causes the computer to execute the methods performed by the terminal device or network device in the various embodiments of this application.
- the term "instruction" can be a direct instruction, an indirect instruction, or an indication of a relationship.
- a instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.
- B corresponding to A means that B is associated with A, and B can be determined based on A.
- determining B based on A does not mean that B is determined solely based on A; B can also be determined based on A and/or other information.
- correlate can indicate a direct or indirect correspondence between two things, or an association between two things, or a relationship such as instruction and being instructed, configuration and being configured.
- predefined or “preconfigured” can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices).
- predefined can refer to what is defined in the protocol.
- the "protocol” may refer to a standard protocol in the field of communication, such as the LTE protocol, the NR protocol, and related protocols applied to future communication systems. This application does not limit this.
- the term "and/or” is merely a description of the relationship between related objects, indicating that three relationships can exist.
- a and/or B can represent: A existing alone, A and B existing simultaneously, or B existing alone.
- the character "/" in this document generally indicates that the preceding and following related objects have an "or" relationship.
- the disclosed systems, apparatuses, and methods can be implemented in other ways.
- the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods.
- multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.
- the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.
- the units described as separate components may or may not be physically separate.
- the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
- the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.
- implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof.
- software When implemented using software, it can be implemented entirely or partially in the form of a computer program product.
- the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated.
- the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
- the computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another.
- the computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means.
- the computer-readable storage medium can be any available medium that a computer can read or a data storage device such as a server or data center that integrates one or more available media.
- the available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs (DVDs)), or semiconductor media (e.g., solid-state drives (SSDs)).
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Abstract
提供了一种无线通信的方法、终端设备和网络设备。所述方法包括:终端设备执行LTM流程,所述LTM流程中包括针对第一节点和第二节点的提前同步,所述提前同步包括上行同步和/或下行同步。如此,使得LTM流程能够应用于终端设备能够同时连接多个节点的场景。
Description
本申请涉及通信技术领域,并且更为具体地,涉及一种无线通信的方法、终端设备和网络设备。
层1/层2触发的移动性(L1/L2-triggered mobility,LTM)技术可以有效缩短切换时延。如何进一步优化LTM过程,成为需要解决的问题。
发明内容
本申请提供一种无线通信的方法、终端设备和网络设备。下面对本申请涉及的各个方面进行介绍。
第一方面,提供一种无线通信方法,包括:终端设备执行LTM流程,所述LTM流程中包括针对第一节点和第二节点的提前同步,所述提前同步包括上行同步和/或下行同步。
第二方面,提供一种无线通信方法,包括:网络设备指示终端设备执行LTM流程,所述LTM流程中包括针对第一节点和第二节点的提前同步,所述提前同步包括上行同步和/或下行同步。
第三方面,提供一种终端设备,包括:处理单元,用于执行LTM流程,所述LTM流程中包括针对第一节点和第二节点的提前同步,所述提前同步包括上行同步和/或下行同步。
第四方面,提供一种网络设备,包括:处理单元,用于指示终端设备执行LTM流程,所述LTM流程中包括针对第一节点和第二节点的提前同步,所述提前同步包括上行同步和/或下行同步。
第五方面,提供一种终端设备,包括收发器、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,并控制所述收发器接收或者发送信号,以使所述终端设备执行如第一方面所述的方法。
第六方面,提供一种网络设备,包括收发器、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,并控制所述收发器接收或者发送信号,以使所述网络设备执行如第二方面所述的方法。
第七方面,提供一种装置,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第一方面或者第二方面中任一项所述的方法。
第八方面,提供一种芯片,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第一方面或者第二方面所述的方法。
第九方面,提供一种计算机可读存储介质,其上存储有程序,所述程序使得计算机执行如第一方面或者第二方面所述的方法。
第十方面,提供一种计算机程序产品,包括程序,所述程序使得计算机执行如第一方面或者第二方面所述的方法。
第十一方面,提供一种计算机程序,所述计算机程序使得计算机执行如第一方面或者第二方面所述的方法。
本申请实施例中,终端设备执行的LTM流程中包括针对第一节点和第二节点的上行和/下行的提前同步,使得LTM流程能够应用于终端设备能够同时连接多个节点的场景。
图1为可应用本申请实施例的无线通信系统的系统架构示例图。
图2为LTM流程的示意图。
图3为本申请实施例的无线通信方法的流程示意图。
图4为本申请实施例的终端设备的结构示意图。
图5为本申请实施例的网络设备的结构示意图。
图6为可应用本申请实施例的装置的示意图。
下面将结合附图,对本申请中的技术方案进行描述。
无线通信系统
图1是可应用本申请实施例的无线通信系统100的系统架构的示例图。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
定的地理区域提供网络覆盖,并且可以与位于该覆盖区域内的终端设备120进行通信。终端设备120可以通过网络设备110接入网络,例如无线网络。可选地,该无线通信系统100还可以包括网络控制器、移动管理实体等其他网络实体,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(fifth generation,5G)系统或者新无线(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,例如第六代移动通信系统,又例如卫星通信系统,等等。
本申请实施例中的终端设备也可称为用户设备(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,终端设备可以用于充当基站。例如,终端设备可以充当调度实体,其在车联万物(vehicle to everything,V2X)或设备到设备(device to device,D2D)等中的终端设备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。该网络设备例如可以是接入网设备或无线接入网设备。比如,网络设备可以是基站。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: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)、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,或者其组合。
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,当终端设备从一个小区(也称源小区)移动到另一个小区(也称目标小区)时,为了保持通信,终端设备需要切换到另一个小区。通常,小区切换可以包括传统的切换机制和条件切换(conditional handover,CHO)机制两种。
对于传统的切换机制而言,为了提高通信系统为处于连接态的终端设备提供服务的连续性,网络设备会在适当时机,例如在服务小区内终端设备的信号测量结果低于阈值的情况下,向终端设备发送切换命令,以指示终端设备进行小区切换。该切换命令例如可以是包括同步重配信息的无线资源控制(radio resource control,RRC)重配置消息。
对于条件切换机制而言,网络设备可以将一个或者多个候选小区的配置,以及与一个或者多个候选小区关联的条件切换事件配置给终端设备。该条件切换事件也可以称为条件切换触发条件。相应地,终端设备可以基于候选小区的信号测量结果,确定是否满足条件切换事件。如果终端设备确定某个候选小区满足条件切换事件,则终端设备可以向该候选小区发起随机接入。
LTM流程
为了进一步缩短切换时延,保障业务的连续性,第三代合作伙伴计划(3rd generation partnership project,3GPP)支持LTM流程。为了便于理解,以下结合图2对LTM过程进行介绍。
如图2所示,LTM流程可以包括LTM准备(LTM preparation)阶段、LTM执行(LTM execution)阶段和LTM完成(LTM completion)阶段。
图2中的步骤210和步骤230属于LTM准备阶段。
在步骤210中,终端设备向网络设备上报测量结果。该测量结果可以是层3(layer 3,L3)的测量结果。之后,网络设备可以基于终端设备上报的测量结果确定发起LTM过程,并触发候选小区准备。
在步骤220中,网络设备向终端设备发送包括LTM候选小区配置(或者称LTM候选配置、LTM配置)的RRC消息。例如,网络设备可以向终端设备发送RRC重配置(RRC reconfiguration)消息以
指示LTM候选小区配置。
其中,网络设备向终端设备发送的LTM候选小区配置可以包括一个或者多个候选小区的配置信息,例如包括一个或者多个主小区的配置信息、以及包括一个或者多个主辅小区或者一个或者多个辅小区的配置信息。该配置信息用于终端设备执行提前同步例如提前上行同步和/或提前下行同步的过程。
在步骤230中,在接收到LTM候选小区配置之后,终端设备存储LTM候选小区配置,并向网络设备发送RRC重配置完成(RRC reconfiguration complete)消息。
在一些实现方式中,在步骤240a和步骤240b,终端设备完成LTM准备阶段之后,可以提前执行与候选小区的同步,以缩短切换过程中的中断时延。该过程可以看作是提前同步阶段,或者成早期同步(early synchronization)阶段。这里,所述的同步可以包括下行同步(参见步骤240a)和/或上行同步(参见步骤240b)。
图2中的步骤250、步骤260和步骤270属于LTM执行阶段,其中步骤270为可选的。
在步骤250中,终端设备对各个候选小区进行层1(layer 1,L1)测量,并向网络设备上报层1测量结果。网络设备接收终端设备上报的层1测量结果之后,可以基于层1测量结果确定目标小区。
在步骤260中,网络设备向终端设备发送小区切换命令(cell switch command),以指示终端设备切换至目标小区。例如,该小区切换命令可以承载于媒体接入控制控制单元(medium access control control element,MAC CE)。终端设备接收该小区切换命令之后,与源小区分离(detach from source cell),并应用目标小区的配置即目标配置。
在一些实现方式中,如果终端设备当前没有目标小区的有效定时提前(timing advance,TA),那么终端设备在LTM执行阶段还可以执行步骤270。在步骤270中,终端设备执行随机接入信道(random access channel,RACH)过程,即向目标小区发起随机接入。
图2中的步骤280属于LTM完成阶段。
在步骤280中,终端设备指示LTM完成。例如,终端设备可以向目标小区发送LTM成功完成的指示信息。
对于上述的提前同步阶段,终端设备在接收到步骤260中的小区切换命令之前,可以提前执行与候选小区的同步,以缩短切换过程中的中断时延。作为示例,终端设备提前执行针对候选小区的上行同步的过程可以包括以下两种:1)终端设备基于当前的服务小区的TA值,计算候选小区的TA值,例如,基于服务小区和候选小区的下行参考信号的延迟之间的差异,推算候选小区的TA值;2)服务小区通过物理下行控制信道(physical downlink control channel,PDCCH)命令(PDCCH order)触发终端设备向候选小区发送前导码(preamble),候选小区通过接收终端设备发送的前导码,计算终端设备在该小区下的TA值,并将TA值及其关联的定时提前组(timing advance group,TAG)的标识信息告知服务小区,以用于服务小区将其携带于小区切换命令中。如果提前同步的过程成功执行,那么可以不再执行前述的步骤270,因此该过程也可以称为无RACH的LTM流程(RACH-less LTM)。如果因某些原因例如终端设备的位置移动、信号延迟等导致提前同步过程失败,终端设备没有获得目标小区的TA值,那么需要执行前述的步骤270。
作为示例,终端设备提前执行针对候选小区的下行同步的过程包括终端设备基于网络设备的测量配置信息执行下行测量。
CA和DC
在CA技术中,允许将两个或者更多的组件载波(component carrier,CC)聚合形成更宽的带宽资源,共同为终端设备进行数据调度。通过增加有效带宽,可以显著提高终端设备的数据传输速率,系统可以具有更高的吞吐量(throughput)。在CA场景下,除了主小区(primary cell,PCell),还会为终端设备配置一个或者多个辅小区(secondary cell,SCell),这些小区共同为终端设备提供更高的数据速率和更好的覆盖。
在DC场景中,一个终端设备可能同时连接两个小区集合,即主小区组(master cell group,MCG)和辅小区组(secondary cell group,SCG)。其中,MCG至少包括一个主小区(primary cell,PCell),可选地,MCG还可以包括一个或者多个辅小区(secondary cell,SCell);SCG包括一个主辅小区(primary secondary cell,PSCell),可选地,SCG还可以包括一个或者多个SCell。需要说明的是,由于MCG包括的全部小区通常部署在一个节点(node)内,因此,在一些场景下,MCG也可以成为主节点(master node,MN);由于SCG包括的全部小区通常部署在一个节点内,因此,在一些场景下,SCG也可以称为辅节点(secondary node,SN)。
如前所述,LTM流程的引入可以减少切换过程中所带来的时延。为了进一步保证切换过程中较高的吞吐量,LTM流程需要适用于终端设备能够同时连接多个节点的场景中。为此,本申请实施例对LTM流程中的提前同步方案进行了改善。其中,终端设备执行的LTM流程中包括针对第一节点和第二节点
的提前同步,使得LTM流程能够应用于终端设备能够同时连接多个节点的场景中。例如,在DC场景下,在对主小区提前同步的情况下,对主辅小区也进行提前同步;或者,在CA场景下,在对主小区提前同步的情况下,对辅小区也进行提前同步。
下面结合图3,对本申请实施例进行详细介绍。
图3为本申请实施例提供的无线通信的方法的流程示意图。图3所示的方法300可以由终端设备和网络设备执行。如图3所示,方法300可以包括以下步骤中的部分或者全部。
参见图3,在步骤310,网络设备指示终端设备执行LTM流程。
在步骤320中,终端设备执行LTM流程。
其中,该LTM流程中包括针对第一节点和第二节点的提前同步,这里,所述的提前同步包括上行同步和/或下行同步。
在一些实现方式中,第一节点包括以下中的一种或者多种:主小区、主辅小区、辅小区;和/或,第二节点包括以下中的一种或者多种:主辅小区、辅小区。此外,可选地,对于多TRP(multi-TRP)场景,第二节点还可以包括发送接收点(transmission and receiving point,TRP),其中,该TRP与第一节点可以属于相同小区,或者属于不同的小区。
举例来说,在DC场景下,第一节点可以是主小区,第二节点可以是主辅小区。
又例如,在CA场景下,第一节点可以是主小区,第二节点可以是辅小区;或者,第一节点可以是主辅小区,第二节点可以是辅小区。
本申请实施例对需要执行提前同步的小区或者TRP的数量不做限定,终端设备可以在LTM流程中执行针对两个或者多个节点的提前同步。例如,第一节点可以包括一个或者多个主小区,第二节点可以包括一个或者多个主辅小区;又例如,第一节点可以包括一个或者多个主小区,第二节点可以包括一个或者多个辅小区。
另外,终端设备可以对第一节点以及与该第一节点关联的全部第二节点执行提前同步,或者可以对第一节点以及与该第一节点关联的部分第二节点执行提前同步。例如,终端设备可以对主小区、以及该主小区关联的全部辅小区执行提前同步;或者,终端设备可以对主小区、以及该主小区关联的其中某个辅小区执行提前同步。
需要说明的是,在LTM流程中,针对第一节点和第二节点的提前同步,可以是并行执行,即终端设备同时向第一节点和第二节点进行提前同步,例如,终端设备同时与主小区和主辅小区之间进行提前同步,或者同时与主小区和辅小区之间进行提前同步;或者,在不支持对第一节点和第二节点的同时同步的情况下,终端设备可以基于第一节点和第二节点的优先级顺序,依次对第一节点和第二节点执行提前同步。作为示例,假设主小区中配置了TRP11和TRP12,主辅小区中配置了TRP21和TRP22,且优先级顺序依次为TRP11、TRP12、TRP21、TRP22,如果终端设备需要向主小区中的TRP11和辅小区中的TRP21提前同步,则可以先与TRP11之间进行同步,之后与TRP21之间进行同步。
在一些实现方式中,方法300还可以包括,终端设备接收网络设备发送的第一信息。其中,该第一信息用于针对第一节点的提前同步。该第一信息也可以称为第一配置。以下,对第一信息进行详细描述。
在一些实现方式中,该第一信息包括以下中的一种或者多种:用于第一节点的上行同步的第一资源信息;用于第一节点的下行同步的第二资源信息;用于第一节点的上行同步的功率信息;与第一节点相关的标识信息。
其中,用于第一节点的上行同步的第一资源信息,例如可以包括RACH资源,和/或探测参考信号(sounding reference signal,SRS)等上行参考信号的资源。其中,RACH资源例如包括SSB、MSG 1的连续传输次数(MSG1 repetition number)、物理随机接入信道(physical random access channel,PRACH)掩码索引(PRACH MASK index)等。其中,SRS资源例如包括SRS和/或SRS集合(SRS set)的资源。
用于第一节点的下行同步的第二资源信息,例如可以包括下行参考信号的资源,比如包括以下中的一种或者多种:传输配置指示(transmission configuration indication,TCI)状态(TCI state)、同步信号广播信道块(synchronization signal block/physical broadcast channel block,SS/PBCH block,SSB)、信道状态信息参考信号(channel state information reference signal,CSI-RS)资源、追踪参考信号(tracking reference signal,TRS)资源、SRS资源。其中,SRS资源例如包括SRS和/或SRS set的资源。TCI状态可以是针对上行或者下行的,也可以是同时针对上行与下行的。
用于第一节点的上行同步的功率信息例如可以是RACH过程中用于发送前导码的功率。
与第一节点相关的标识信息例如可以是第一节点的标识,例如第一节点的小区标识或者候选配置标识,该候选配置标识是在第一节点被作为候选小区时为其重新分配的不同于其小区标识的标识;或者,与第一节点相关的标识信息还可以是与第一节点对应的资源相关联的资源信息等,例如物理小区标识
(physical cell identifier,PCI)、TRP标识、控制资源集(control-resource set,CORESET)、CORESET资源池(pool)、载波(carrier)、参考信号资源等。其中,该参考信号例如包括SRS、TRS、SSB、CSI-RS等。
终端设备可以利用第一信息执行针对第一节点的上行同步和/或下行同步,例如,上行同步的操作包括向第一节点发起随机接入过程,或者基于网络设备发送的SRS配置信息执行SRS的传输,下行同步的操作包括基于第一信息确定下行参考信号后,对下行参考信号进行相应的测量或者追踪。网络设备可以在之后传输的消息中将终端设备执行上行同步的结果例如TA值指示给终端设备。
在一些实现方式中,方法300还可以包括,终端设备接收网络设备发送的第二信息。其中,该第二信息用于针对第二节点的提前同步。该第二信息也可以称为第二配置。以下,对第二信息进行详细描述。
在一些实现方式中,该第二信息包括以下中的一种或者多种:用于第二节点的上行同步的第一资源信息;用于第二节点的下行同步的第二资源信息;用于第二节点的上行同步的功率信息;与第二节点相关的标识信息;第二节点的状态信息。
其中,用于第二节点的上行同步的第一资源信息,例如可以包括RACH资源,和/或SRS等上行参考信号的资源。其中,RACH资源例如包括SSB、MSG1 repetition number、PRACH MASK index等。SRS资源例如包括SRS和/或SRS set的资源。
用于第二节点的下行同步的第二资源信息,例如可以包括下行参考信号的资源,比如包括以下中的一种或者多种:TCI状态、SSB、CSI-RS资源、TRS资源、SRS资源。其中,SRS资源例如包括SRS和/或SRS set的资源。
用于第二节点的上行同步的功率信息例如可以是RACH过程中用于发送前导码的功率。
与第二节点相关的标识信息例如可以是第二节点的标识,例如第二节点的小区标识或者候选配置标识,该候选配置标识是在第二节点被作为候选小区时为其重新分配的不同于其小区标识的标识,在第二节点为TRP的情况下还可以是与TRP关联的小区的标识;或者,与第二节点相关的标识信息还可以是与第二节点对应的资源相关联的资源信息等,例如PCI、TRP标识、CORESET、CORESET资源池、载波、参考信号资源等。该参考信号例如包括SRS、TRS、SSB、CSI-RS等。其中,TCI状态可以是针对上行或者下行的,也可以是同时针对上行与下行的。
第二节点的状态信息例如可以包括激活或者去激活的状态。
终端设备可以利用第二信息执行针对第二节点的上行同步和/或下行同步,例如,上行同步的操作包括向第二节点发起随机接入过程,或者基于网络设备发送的SRS配置信息执行SRS的传输,下行同步的操作包括基于第二信息确定下行参考信号后,对下行参考信号进行相应的测量或者追踪。网络设备可以在之后传输的消息中将终端设备执行上行同步的结果例如TA值指示给终端设备。
除了上述的第一信息和第二信息,可选地,网络设备还可以向终端设备发送小区指示信息,该小区指示信息用于指示上行同步过程,或者说随机接入过程,是针对候选小区还是针对服务小区发起的。
在一些实现方式中,第二信息可以独立于第一信息传输;或者,第二信息可以携带于第一信息,即第一信息中携带第二信息。也就是说,网络设备可以触发两条信息即第一信息和第二信息,分别指示终端设备执行针对第一节点和第二节点的提前同步,也可以触发一条信息即第一信息,来指示终端设备执行针对第一节点和第二节点的提前同步。
在一些实现方式中,可以通过同步指示信息,来指示终端设备执行针对第二节点的提前同步。例如,第二信息中可以包括同步指示信息;或者,第一信息中可以包括该同步指示信息;或者该同步指示信息可以独立于第一信息和第二信息传输。通过该同步指示信息指示终端设备执行针对第二节点的提前同步,可以使得对第二节点的提前同步的触发更加灵活。
作为示例,该同步指示信息占用1比特,以此来指示终端设备在触发针对第一节点的提前同步的情况下,是否也需要执行针对第二节点的提前同步,比如该比特为1表示执行对第一节点和第二节点的提前同步,该比特为0表示仅执行针对第一节点的提前同步。
在另一些实现方式中,网络设备也可以不向终端设备发送该同步指示信息,这时,LTM流程可以包括,在执行针对第一节点的提前同步的情况下,默认执行针对第二节点的提前同步。这样,无需增加额外的信令开销,便能够同时触发针对第一节点和第二节点的提前同步。
作为示例,在确定执行针对主小区的提前同步的情况下,默认需要执行针对与该主小区关联的主辅小区的提前同步;又例如,在确定执行针对主小区的提前同步的情况下,默认需要执行针对与该主小区关联的辅小区的提前同步。这时,可选地,网络设备也可以不向终端设备发送第一信息和/或第二信息,终端设备可以基于前述的LTM准备阶段接收的LTM候选小区配置中的资源信息等,执行针对第二节点的提前同步。
此外,也可以通过隐式指示的方式,指示终端设备在执行针对第一节点的提前同步的情况下,也需
要执行针对第二节点的提前同步。可选地,第一节点和第二节点可以共用候选配置标识。作为示例,候选配置标识000用于指示主小区和主辅小区,候选配置标识001用于指示主小区和辅小区,等等。基于共用的候选配置标识,终端设备可以确定需要与主小区同时执行提前同步的另外一个小区。
网络设备可以在LTM准备阶段、提前同步阶段或者LTM执行阶段向终端设备发送上述的第一信息和/或第二信息。在一些实现方式中,第一信息和/或第二信息可以承载于以下中的一种或者多种:MAC CE;下行控制信息(downlink control information,DCI);RRC信令;小区切换命令。
上面描述了终端设备基于网络设备的指示,在LTM流程中执行针对第一节点和第二节点的提前同步。本申请实施例中,终端设备也可以基于条件触发对第一节点和/或第二节点的提前同步。
在一些实现方式中,方法300还可以包括,在满足预定条件的情况下,终端设备确定执行针对第一节点和第二节点的提前同步。
其中,该预定条件例如基于以下中的一种或者多种确定:信号测量结果;终端设备的位置;时间信息。或者,该预定条件也可以基于终端设备的内部实现确定。作为示例,在当前的服务小区的信号质量的测量值小于相应阈值的情况下,可以执行针对第一节点和/或第二节点的提前同步;又例如,在第一节点和/或第二节点的信号质量的测量值大于相应阈值的情况下,执行针对第一节点和/或第二节点的提前同步;又例如,当终端设备的位置位于指定区域的情况下,执行针对第一节点和/或第二节点的提前同步;又例如,在当前的时间位于指定时间段内的情况下,执行针对第一节点和/或第二节点的提前同步。该指定时间段可以是预先约定的或者网络设备发送的。
该预定条件可以与网络设备的指示相结合,来触发终端设备执行针对第一节点和第二节点的提前同步。例如,在一些实现方式中,终端设备基于网络设备发送的第一信息,确定执行针对第一节点的提前同步,并在满足该预定条件的情况下,确定执行针对第二节点的提前同步。其中,终端设备可以在接收到第一信息之后或者针对第一节点的提前同步完成后,基于该预定条件判断是否触发针对第二节点的提前同步。
该预定条件例如可以是预先约定的;或者,网络设备可以向终端设备发送该预定条件的信息,该预定条件用于触发针对第一节点和/或第二节点的提前同步。
下面结合具体示例,更加详细地描述本申请实施例。应注意,以下是示例仅仅是为了帮助本领域技术人员理解本申请实施例,而非要将本申请实施例限于所例示的具体数值或具体场景。本领域技术人员根据所给出的示例,显然可以进行各种等价的修改或变化,这样的修改或变化也落入本申请实施例的范围内。
以DC场景为例,第一节点为主小区,第二节点为主辅小区。终端设备接收网络设备发送的第一信息,该第一信息包括:与主小区相关的标识信息,例如主小区的标识信息或者与主小区关联的传输资源的信息;针对主小区的上行同步过程所需要的第一资源信息,例如RACH资源或者SRS资源;针对主小区的下行同步过程所需要的第二资源信息,例如TCI状态、SSB、CSI-RS、TRS、SRS等的配置信息。终端设备还可以接收网络设备发送的第二信息,该第二信息包括:与主辅小区相关的标识信息,例如主辅小区的标识信息或者与主辅小区关联的传输资源的信息;针对主辅小区的上行同步过程所需要的第一资源信息,例如RACH资源或者SRS资源;针对主辅小区的下行同步过程所需要的第二资源信息,例如TCI状态、SSB、CSI-RS、TRS、SRS等的配置信息。第二信息可以与第一信息相互独立,或者第二信息可以携带于第一信息。可选地,终端设备还可能接收到网络设备发送的小区指示信息、条件指示信息等。终端设备基于上述信息,执行针对主小区和主辅小区的上行同步,向主小区和主辅小区发起上行随机接入流程,并且执行针对主小区和主辅小区的下行同步,对下行参考信号进行相应的测量。
以CA场景为例,第一节点为主小区,第二节点为与该主小区关联的辅小区。终端设备接收网络设备发送的第一信息,该第一信息包括:与主小区相关的标识信息,例如主小区的标识信息或者与主小区关联的传输资源的信息;针对主小区的上行同步过程所需要的第一资源信息,例如RACH资源或者SRS资源;针对主小区的下行同步过程所需要的第二资源信息,例如TCI状态、SSB、CSI-RS、TRS、SRS等的配置信息。终端设备还可以接收网络设备发送的第二信息,该第二信息包括:与辅小区相关的标识信息例如辅小区的标识信息或者与辅小区关联的传输资源的信息;针对辅小区的上行同步过程所需要的第一资源信息例如RACH资源或者SRS资源;针对辅小区的下行同步过程所需要的第二资源信息,例如TCI状态、SSB、CSI-RS、TRS、SRS等的配置信息。第二信息可以与第一信息相互独立,或者第二信息可以携带于第一信息。可选地,终端设备还可能接收到网络设备发送的小区指示信息、条件指示信息等。终端设备基于上述信息,执行针对主小区、以及与主小区关联的辅小区的上行同步,向主小区和辅小区发起上行随机接入流程,并且执行针对主小区和辅小区的下行同步,对下行参考信号进行相应的测量。
以multi-TRP场景为例,第一节点为主小区,第二节点为与该主小区关联的TRP。终端设备接收网
络设备发送的第一信息,该第一信息包括:与主小区相关的标识信息,例如主小区的标识信息或者与主小区关联的传输资源的信息;针对主小区的上行同步过程所需要的第一资源信息,例如RACH资源或者SRS资源;针对主小区的下行同步过程所需要的第二资源信息,例如TCI状态、SSB、CSI-RS、TRS、SRS等的配置信息。终端设备还可以接收网络设备发送的第二信息,该第二信息包括:与TRP相关的标识信息,例如TRP的标识信息或者与TRP关联的传输资源的信息;针对TRP的上行同步过程所需要的第一资源信息,例如RACH资源或者SRS资源;针对TRP的下行同步过程所需要的第二资源信息,例如TCI状态、SSB、CSI-RS、TRS、SRS等的配置信息。第二信息可以与第一信息相互独立,或者第二信息可以携带于第一信息。可选地,终端设备还可能接收到网络设备发送的小区指示信息、条件指示信息等。终端设备基于上述信息,执行针对主小区、以及主小区内的TRP的上行同步,向主小区和TRP发起上行随机接入流程,并且执行针对主小区和TRP的下行同步,对下行参考信号进行相应的测量。
上文结合图3,详细描述了本申请的方法实施例,下面结合图4至图6,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4为本申请实施例提供的终端设备的结构示意图。图4所示的终端设备400可以包括处理单元410。处理单元410用于执行LTM流程,所述LTM流程中包括针对第一节点和第二节点的提前同步,所述提前同步包括上行同步和/或下行同步。
在一些实现方式中,所述第一节点包括以下中的一种或者多种:主小区、主辅小区、辅小区;和/或,所述第二节点包括以下中的一种或者多种:主辅小区、辅小区、TRP。
在一些实现方式中,所述终端设备还包括收发单元420,用于:接收网络设备发送的第一信息,所述第一信息用于针对所述第一节点的提前同步。
在一些实现方式中,所述第一信息包括以下中的一种或者多种:用于所述第一节点的上行同步的第一资源信息;用于所述第一节点的下行同步的第二资源信息;用于所述第一节点的上行同步的功率信息;与所述第一节点相关的标识信息。
在一些实现方式中,收发单元420还用于:接收网络设备发送的第二信息,所述第二信息用于针对所述第二节点的提前同步。
在一些实现方式中,所述第二信息包括以下中的一种或者多种:用于所述第二节点的上行同步的第一资源信息;用于所述第二节点的下行同步的第二资源信息;用于所述第二节点的上行同步的功率信息;与所述第二节点相关的标识信息;所述第二节点的状态信息。
在一些实现方式中,所述第二信息独立于所述第一信息传输;或者,所述第一信息中携带所述第二信息。
在一些实现方式中,所述第二信息还包括同步指示信息,所述同步指示信息用于指示所述终端设备执行针对所述第二节点的提前同步;或者,所述第一信息还包括所述同步指示信息;或者,所述同步指示信息独立于所述第一信息和所述第二信息传输至所述终端设备;或者,所述LTM流程包括,在执行针对所述第一节点的提前同步的情况下,默认执行针对所述第二节点的提前同步。
在一些实现方式中,所述第一资源信息包括随机接入信道RACH资源和/或探测参考信号SRS资源;和/或,所述第二资源信息包括以下中的一种或者多种:TCI状态、SSB、CSI-RS资源、TRS资源、SRS资源。
在一些实现方式中,所述第一信息和/或第二信息承载于以下中的一种或者多种:MAC CE;DCI;RRC信令;小区切换命令。
在一些实现方式中,处理单元410还用于:在满足预定条件的情况下,确定执行针对所述第一节点和/或所述第二节点的提前同步。
在一些实现方式中,所述预定条件基于以下中的一种或者多种确定:信号测量结果;所述终端设备的位置;当前的时间信息。
在一些实现方式中,处理单元410具体用于:基于所述网络设备发送的第一信息,确定执行针对所述第一节点的提前同步;在满足所述预定条件的情况下,确定执行针对所述第二节点的提前同步。
在一些实现方式中,收发单元420还用于:接收所述网络设备发送的所述预定条件的信息。
在一些实现方式中,所述终端设备应用于DC场景和/或CA场景中。
可以理解,处理单元410可以是处理器610,收发单元420可以是收发器630。此外,可选地,终端设备400还包括和存储器620。
图5为本申请实施例提供的网络设备的结构示意图。图5所示的网络设备500包括收发单元510。收发单元510用于指示终端设备执行层1/层2触发的移动性LTM流程,所述LTM流程中包括针对第
一节点和第二节点的提前同步,所述提前同步包括上行同步和/或下行同步。
在一些实现方式中,所述第一节点包括以下中的一种或者多种:主小区、主辅小区、辅小区;和/或,所述第二节点包括以下中的一种或者多种:主辅小区、辅小区、TRP。
在一些实现方式中,收发单元510具体用于:向所述终端设备发送第一信息,所述第一信息用于针对所述第一节点的提前同步。
在一些实现方式中,所述第一信息包括以下中的一种或者多种:用于所述第一节点的上行同步的第一资源信息;用于所述第一节点的下行同步的第二资源信息;用于所述第一节点的上行同步的功率信息;与所述第一节点相关的标识信息。
在一些实现方式中,收发单元510具体用于:向所述终端设备发送第二信息,所述第二信息用于针对所述第二节点的提前同步。
在一些实现方式中,所述第二信息包括以下中的一种或者多种:用于所述第二节点的上行同步的第一资源信息;用于所述第二节点的下行同步的第二资源信息;用于所述第二节点的上行同步的功率信息;与所述第二节点相关的标识信息;所述第二节点的状态信息。
在一些实现方式中,所述第二信息独立于所述第一信息传输;或者,所述第一信息中携带所述第二信息。
在一些实现方式中,所述第二信息还包括同步指示信息,所述同步指示信息用于指示所述终端设备执行针对所述第二节点的提前同步;或者,所述第一信息还包括所述同步指示信息;或者,所述同步指示信息独立于所述第一信息和所述第二信息传输至所述终端设备;或者,所述LTM流程包括,在执行针对所述第一节点的提前同步的情况下,默认执行针对所述第二节点的提前同步。
在一些实现方式中,所述第一资源信息包括随机接入信道RACH资源和/或探测参考信号SRS资源;和/或,所述第二资源信息包括以下中的一种或者多种:TCI状态、SSB、CSI-RS资源、TRS资源、SRS资源。
在一些实现方式中,所述第一信息和/或第二信息承载于以下中的一种或者多种:MAC CE;DCI;RRC信令;小区切换命令。
在一些实现方式中,收发单元510还用于:向终端设备发送预定条件的信息,所述预定条件用于触发针对所述第一节点和/或所述第二节点的提前同步。
在一些实现方式中,所述预定条件基于以下中的一种或者多种确定:信号测量结果;所述终端设备的位置;当前的时间信息。
在一些实现方式中,针对所述第一节点的提前同步基于所述网络设备发送的第一信息触发,且针对所述第二节点的提前同步基于所述预定条件触发。
在一些实现方式中,所述网络设备应用于DC场景和/或CA场景中。
可以理解,收发单元510可以是收发器630。此外,可选地,网络设备500还包括处理器610和存储器620,具体参见图6。
图6是可应用本申请实施例的用于通信的装置的示意性结构图。图6中所示的虚线表示该单元或者模块为可选的。装置600可用于实现上述方法实施例中描述的方法。装置600例如可以是芯片、终端设备或者网络设备。
装置600可以包括一个或者多个处理器610。处理器610可支持装置600实现前述方法实施例所描述的方法。处理器610可以是通用处理器或者专用处理器。例如,处理器610可以为中央处理单元(central processing unit,CPU)。或者,处理器610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)、现成可编程门阵列(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是任何常规的处理器等。
装置600还可以包括一个或者多个存储器620。存储器620上存储有程序,该程序可以被处理器610执行,使得处理器610执行前文方法实施例所描述的方法。存储器620可以独立于处理器610也可以集成在处理器610中。
装置600还可以包括收发器630。处理器610可以通过收发器630与其他设备或者芯片进行通信。例如,处理器610可以通过收发器630与其他设备或者芯片进行数据收发。
本申请实施例还提供一种通信系统。该通信系统包括上述的终端设备和网络设备。在一些实现方式中,该系统还包括与终端设备和网络设备进行交互的其他设备。
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设备或者网络设备中,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者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设备或者网络设备中,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者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者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。
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 (65)
- 一种无线通信的方法,其特征在于,包括:终端设备执行层1/层2触发的移动性LTM流程,所述LTM流程中包括针对第一节点和第二节点的提前同步,所述提前同步包括上行同步和/或下行同步。
- 根据权利要求1所述的方法,其特征在于,所述第一节点包括以下中的一种或者多种:主小区、主辅小区、辅小区;和/或,所述第二节点包括以下中的一种或者多种:主辅小区、辅小区、发送接收点TRP。
- 根据权利要求1或2所述的方法,其特征在于,所述方法还包括:所述终端设备接收网络设备发送的第一信息,所述第一信息用于针对所述第一节点的提前同步。
- 根据权利要求3所述的方法,其特征在于,所述第一信息包括以下中的一种或者多种:用于所述第一节点的上行同步的第一资源信息;用于所述第一节点的下行同步的第二资源信息;用于所述第一节点的上行同步的功率信息;与所述第一节点相关的标识信息。
- 根据权利要求3或4所述的方法,其特征在于,所述方法还包括:所述终端设备接收网络设备发送的第二信息,所述第二信息用于针对所述第二节点的提前同步。
- 根据权利要求5所述的方法,其特征在于,所述第二信息包括以下中的一种或者多种:用于所述第二节点的上行同步的第一资源信息;用于所述第二节点的下行同步的第二资源信息;用于所述第二节点的上行同步的功率信息;与所述第二节点相关的标识信息;所述第二节点的状态信息。
- 根据权利要求5或6所述的方法,其特征在于,所述第二信息独立于所述第一信息传输;或者,所述第一信息中携带所述第二信息。
- 根据权利要求5至7中任一项所述的方法,其特征在于,所述第二信息还包括同步指示信息,所述同步指示信息用于指示所述终端设备执行针对所述第二节点的提前同步;或者,所述第一信息还包括所述同步指示信息;或者,所述同步指示信息独立于所述第一信息和所述第二信息传输至所述终端设备;或者,所述LTM流程包括,在执行针对所述第一节点的提前同步的情况下,默认执行针对所述第二节点的提前同步。
- 根据权利要求4或6所述的方法,其特征在于,所述第一资源信息包括随机接入信道RACH资源和/或探测参考信号SRS资源;和/或,所述第二资源信息包括以下中的一种或者多种:传输配置指示TCI状态、同步信号广播信道块SSB、信道状态信息参考信号CSI-RS资源、追踪参考信号TRS资源、SRS资源。
- 根据权利要求3至9中任一项所述的方法,其特征在于,所述第一信息和/或第二信息承载于以下中的一种或者多种:介质访问控制控制元素MAC CE;下行控制信息DCI;无线资源控制RRC信令;小区切换命令。
- 根据权利要求1至10中任一项所述的方法,其特征在于,所述方法还包括:在满足预定条件的情况下,所述终端设备确定执行针对所述第一节点和/或所述第二节点的提前同步。
- 根据权利要求11所述的方法,其特征在于,所述预定条件基于以下中的一种或者多种确定:信号测量结果;所述终端设备的位置;当前的时间信息。
- 根据权利要求11或12所述的方法,其特征在于,所述在满足预定条件的情况下,所述终端设备确定执行针对所述第一节点和/或所述第二节点的提前同步,包括:所述终端设备基于所述网络设备发送的第一信息,确定执行针对所述第一节点的提前同步;在满足所述预定条件的情况下,确定执行针对所述第二节点的提前同步。
- 根据权利要求11至13中任一项所述的方法,其特征在于,所述方法还包括:所述终端设备接收所述网络设备发送的所述预定条件的信息。
- 根据权利要求1至14中任一项所述的方法,其特征在于,所述方法应用于双链接DC场景和/或载波聚合CA场景中。
- 一种无线通信的方法,其特征在于,包括:网络设备指示终端设备执行层1/层2触发的移动性LTM流程,所述LTM流程中包括针对第一节点和第二节点的提前同步,所述提前同步包括上行同步和/或下行同步。
- 根据权利要求16所述的方法,其特征在于,所述第一节点包括以下中的一种或者多种:主小区、主辅小区、辅小区;和/或,所述第二节点包括以下中的一种或者多种:主辅小区、辅小区、发送接收点TRP。
- 根据权利要求16或17所述的方法,其特征在于,所述网络设备指示终端设备执行LTM流程,包括:所述网络设备向所述终端设备发送第一信息,所述第一信息用于针对所述第一节点的提前同步。
- 根据权利要求18所述的方法,其特征在于,所述第一信息包括以下中的一种或者多种:用于所述第一节点的上行同步的第一资源信息;用于所述第一节点的下行同步的第二资源信息;用于所述第一节点的上行同步的功率信息;与所述第一节点相关的标识信息。
- 根据权利要求18或19所述的方法,其特征在于,所述网络设备指示终端设备执行LTM流程,包括:所述网络设备向所述终端设备发送第二信息,所述第二信息用于针对所述第二节点的提前同步。
- 根据权利要求20所述的方法,其特征在于,所述第二信息包括以下中的一种或者多种:用于所述第二节点的上行同步的第一资源信息;用于所述第二节点的下行同步的第二资源信息;用于所述第二节点的上行同步的功率信息;与所述第二节点相关的标识信息;所述第二节点的状态信息。
- 根据权利要求20或21所述的方法,其特征在于,所述第二信息独立于所述第一信息传输;或者,所述第一信息中携带所述第二信息。
- 根据权利要求20至22中任一项所述的方法,其特征在于,所述第二信息还包括同步指示信息,所述同步指示信息用于指示所述终端设备执行针对所述第二节点的提前同步;或者,所述第一信息还包括所述同步指示信息;或者,所述同步指示信息独立于所述第一信息和所述第二信息传输至所述终端设备;或者,所述LTM流程包括,在执行针对所述第一节点的提前同步的情况下,默认执行针对所述第二节点的提前同步。
- 根据权利要求19或21所述的方法,其特征在于,所述第一资源信息包括随机接入信道RACH资源和/或探测参考信号SRS资源;和/或,所述第二资源信息包括以下中的一种或者多种:传输配置指示TCI状态、同步信号广播信道块SSB、信道状态信息参考信号CSI-RS资源、追踪参考信号TRS资源、SRS资源。
- 根据权利要求18至24中任一项所述的方法,其特征在于,所述第一信息和/或第二信息承载于以下中的一种或者多种:介质访问控制控制元素MAC CE;下行控制信息DCI;无线资源控制RRC信令;小区切换命令。
- 根据权利要求16至25中任一项所述的方法,其特征在于,所述方法还包括:网络设备向终端设备发送预定条件的信息,所述预定条件用于触发针对所述第一节点和/或所述第二节点的提前同步。
- 根据权利要求26所述的方法,其特征在于,所述预定条件基于以下中的一种或者多种确定:信号测量结果;所述终端设备的位置;当前的时间信息。
- 根据权利要求26或27所述的方法,其特征在于,针对所述第一节点的提前同步基于所述网络设备发送的第一信息触发,且针对所述第二节点的提前同步基于所述预定条件触发。
- 根据权利要求16至28中任一项所述的方法,其特征在于,所述方法应用于双链接DC场景和/或载波聚合CA场景中。
- 一种终端设备,其特征在于,包括:处理单元,用于执行层1/层2触发的移动性LTM流程,所述LTM流程中包括针对第一节点和第二节点的提前同步,所述提前同步包括上行同步和/或下行同步。
- 根据权利要求30所述的终端设备,其特征在于,所述第一节点包括以下中的一种或者多种:主小区、主辅小区、辅小区;和/或,所述第二节点包括以下中的一种或者多种:主辅小区、辅小区、发送接收点TRP。
- 根据权利要求30或31所述的终端设备,其特征在于,所述终端设备还包括收发单元,用于:接收网络设备发送的第一信息,所述第一信息用于针对所述第一节点的提前同步。
- 根据权利要求32所述的终端设备,其特征在于,所述第一信息包括以下中的一种或者多种:用于所述第一节点的上行同步的第一资源信息;用于所述第一节点的下行同步的第二资源信息;用于所述第一节点的上行同步的功率信息;与所述第一节点相关的标识信息。
- 根据权利要求32或33所述的终端设备,其特征在于,所述收发单元还用于:接收网络设备发送的第二信息,所述第二信息用于针对所述第二节点的提前同步。
- 根据权利要求34所述的终端设备,其特征在于,所述第二信息包括以下中的一种或者多种:用于所述第二节点的上行同步的第一资源信息;用于所述第二节点的下行同步的第二资源信息;用于所述第二节点的上行同步的功率信息;与所述第二节点相关的标识信息;所述第二节点的状态信息。
- 根据权利要求34或35所述的终端设备,其特征在于,所述第二信息独立于所述第一信息传输;或者,所述第一信息中携带所述第二信息。
- 根据权利要求34至36中任一项所述的终端设备,其特征在于,所述第二信息还包括同步指示信息,所述同步指示信息用于指示所述终端设备执行针对所述第二节点的提前同步;或者,所述第一信息还包括所述同步指示信息;或者,所述同步指示信息独立于所述第一信息和所述第二信息传输至所述终端设备;或者,所述LTM流程包括,在执行针对所述第一节点的提前同步的情况下,默认执行针对所述第二节点的提前同步。
- 根据权利要求33或35所述的终端设备,其特征在于,所述第一资源信息包括随机接入信道RACH资源和/或探测参考信号SRS资源;和/或,所述第二资源信息包括以下中的一种或者多种:传输配置指示TCI状态、同步信号广播信道块SSB、信道状态信息参考信号CSI-RS资源、追踪参考信号TRS资源、SRS资源。
- 根据权利要求32至38中任一项所述的终端设备,其特征在于,所述第一信息和/或第二信息承载于以下中的一种或者多种:介质访问控制控制元素MAC CE;下行控制信息DCI;无线资源控制RRC信令;小区切换命令。
- 根据权利要求30至39中任一项所述的终端设备,其特征在于,所述处理单元还用于:在满足预定条件的情况下,确定执行针对所述第一节点和/或所述第二节点的提前同步。
- 根据权利要求40所述的终端设备,其特征在于,所述预定条件基于以下中的一种或者多种确定:信号测量结果;所述终端设备的位置;当前的时间信息。
- 根据权利要求40或41所述的终端设备,其特征在于,所述处理单元具体用于:基于所述网络设备发送的第一信息,确定执行针对所述第一节点的提前同步;在满足所述预定条件的情况下,确定执行针对所述第二节点的提前同步。
- 根据权利要求40至42中任一项所述的终端设备,其特征在于,收发单元还用于:接收所述网络设备发送的所述预定条件的信息。
- 根据权利要求30至43中任一项所述的终端设备,其特征在于,所述终端设备应用于双链接DC场景和/或载波聚合CA场景中。
- 一种网络设备,其特征在于,包括:收发单元,用于指示终端设备执行层1/层2触发的移动性LTM流程,所述LTM流程中包括针对第一节点和第二节点的提前同步,所述提前同步包括上行同步和/或下行同步。
- 根据权利要求45所述的网络设备,其特征在于,所述第一节点包括以下中的一种或者多种:主小区、主辅小区、辅小区;和/或,所述第二节点包括以下中的一种或者多种:主辅小区、辅小区、发送接收点TRP。
- 根据权利要求45或46所述的网络设备,其特征在于,所述收发单元具体用于:向所述终端设备发送第一信息,所述第一信息用于针对所述第一节点的提前同步。
- 根据权利要求47所述的网络设备,其特征在于,所述第一信息包括以下中的一种或者多种:用于所述第一节点的上行同步的第一资源信息;用于所述第一节点的下行同步的第二资源信息;用于所述第一节点的上行同步的功率信息;与所述第一节点相关的标识信息。
- 根据权利要求47或48所述的网络设备,其特征在于,所述收发单元具体用于:向所述终端设备发送第二信息,所述第二信息用于针对所述第二节点的提前同步。
- 根据权利要求49所述的网络设备,其特征在于,所述第二信息包括以下中的一种或者多种:用于所述第二节点的上行同步的第一资源信息;用于所述第二节点的下行同步的第二资源信息;用于所述第二节点的上行同步的功率信息;与所述第二节点相关的标识信息;所述第二节点的状态信息。
- 根据权利要求49或50所述的网络设备,其特征在于,所述第二信息独立于所述第一信息传输;或者,所述第一信息中携带所述第二信息。
- 根据权利要求49至51中任一项所述的网络设备,其特征在于,所述第二信息还包括同步指示信息,所述同步指示信息用于指示所述终端设备执行针对所述第二节点的提前同步;或者,所述第一信息还包括所述同步指示信息;或者,所述同步指示信息独立于所述第一信息和所述第二信息传输至所述终端设备;或者,所述LTM流程包括,在执行针对所述第一节点的提前同步的情况下,默认执行针对所述第二节点的提前同步。
- 根据权利要求48或50所述的网络设备,其特征在于,所述第一资源信息包括随机接入信道RACH资源和/或探测参考信号SRS资源;和/或,所述第二资源信息包括以下中的一种或者多种:传输配置指示TCI状态、同步信号广播信道块SSB、信道状态信息参考信号CSI-RS资源、追踪参考信号TRS资源、SRS资源。
- 根据权利要求47至53中任一项所述的网络设备,其特征在于,所述第一信息和/或第二信息承载于以下中的一种或者多种:介质访问控制控制元素MAC CE;下行控制信息DCI;无线资源控制RRC信令;小区切换命令。
- 根据权利要求45至54中任一项所述的网络设备,其特征在于,所述收发单元还用于:向终端设备发送预定条件的信息,所述预定条件用于触发针对所述第一节点和/或所述第二节点的提前同步。
- 根据权利要求55所述的网络设备,其特征在于,所述预定条件基于以下中的一种或者多种确定:信号测量结果;所述终端设备的位置;当前的时间信息。
- 根据权利要求55或56所述的网络设备,其特征在于,针对所述第一节点的提前同步基于所述网络设备发送的第一信息触发,且针对所述第二节点的提前同步基于所述预定条件触发。
- 根据权利要求45至57中任一项所述的网络设备,其特征在于,所述网络设备应用于双链接DC场景和/或载波聚合CA场景中。
- 一种终端设备,其特征在于,包括收发器、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,并控制所述收发器接收或发送信号,以使所述终端设备执行根据权利要求1至15中任一项所述的方法。
- 一种网络设备,其特征在于,包括收发器、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,并控制所述收发器接收或发送信号,以使所述网络设备执行根据权利要求16至29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,以使所述装置执行根据权利要求1至15中任一项所述的方法,或者根据权利要求16至29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根据权利要求1至15中任一项所述的方法,或者根据权利要求16至29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根据权利要求1至15中任一项所述的方法,或者根据权利要求16至29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根据权利要求1至15中任一项所述的方法,或者根据权利要求16至29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根据权利要求1至15中任一项所述的方法,或者根据权利要求16至29中任一项所述的方法。
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