Communication method and device and computer readable storage medium

Abstract

The invention provides a communication method and device, and a computer readable storage medium, and the communication method comprises the steps: transmitting a layer 1 measurement parameter which is used for layer 1 / layer 2 triggered mobility LTM switching or layer 1 measurement reporting. The invention provides a technical scheme for realizing parameter configuration in LTM switching so as to ensure the rationality of layer 1 measurement parameters and improve the switching success rate.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication method and apparatus, and a computer-readable storage medium. Background Technology

[0002] In the latest communication systems, the access network splits the next-generation NodeB (gNB) into a centralized unit (CU) and a distributed unit (DU), which are connected via an F1 interface.

[0003] In the prior art, Layer 1 / Layer 2-triggered Mobility (LTM) handover involves the central unit pre-configuring candidate target cells for the terminal device, the distribution unit issuing an LTM handover command to the terminal, and the terminal device handing over to the target cell based on the LTM handover command indication and the pre-configuration of Radio Resource Control (RRC).

[0004] However, with the introduction of Layer 1 measurement event reporting, inappropriate settings of Layer 1 measurement-related parameters can reduce the success rate of LTM handover. Improving the success rate of LTM handover is a pressing technical problem that needs to be addressed. Summary of the Invention

[0005] This application provides a communication method and apparatus, and a technical solution for configuring parameters in LTM handover to improve the handover success rate.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] In a first aspect, a communication method is provided for use on the distribution unit side. The communication method includes: sending layer 1 measurement parameters, which are used for layer 1 / layer 2 triggered mobility LTM handover or layer 1 measurement reporting.

[0008] Optionally, the Layer 1 measurement parameters include at least one of the following: a switching condition, a first condition, or first information, wherein the switching condition is used to trigger conditional LTM switching, the first condition is used to trigger early synchronization or TA acquisition, and the first information is used to configure Layer 1 measurement reporting.

[0009] Optionally, the layer 1 measurement parameters include at least one of the following: the identifier of the measurement event, the threshold of the measurement event, the hysteresis value of the measurement event, the trigger time of the measurement event, and the bias value of the measurement event.

[0010] Optionally, the communication method further includes: receiving the measurement result of layer 1; and in response to the measurement result of layer 1 satisfying the first condition, sending a first command, the first command being used to trigger the terminal device to perform advance synchronization.

[0011] Optionally, the communication method further includes: receiving information about candidate cells and / or handover conditions for layer 3, wherein the information about candidate cells and / or handover conditions for layer 3 are used to determine the layer 1 measurement parameters.

[0012] Optionally, the information of the candidate cell includes the identifier of the candidate cell; the handover conditions of the layer 3 include at least one of the following: the identifier of the handover event, the threshold of the handover event, the hysteresis value of the handover event, the trigger time of the handover event, and the bias value of the handover event.

[0013] Optionally, the communication method further includes: receiving second information, the second information indicating adjustment of the layer 1 measurement parameters; and sending third information, the third information indicating confirmation of adjustment of the layer 1 measurement parameters, or denial of adjustment of the layer 1 measurement parameters.

[0014] Secondly, a communication method is provided for use on the central unit side. The communication method includes receiving Layer 1 measurement parameters, which are used for LTM switching or Layer 1 measurement reporting.

[0015] Optionally, the Layer 1 measurement parameters include at least one of the following: a switching condition, a first condition, or first information, wherein the switching condition is used to trigger conditional LTM switching, the first condition is used to trigger early synchronization or TA acquisition, and the first information is used to configure Layer 1 measurement reporting.

[0016] Optionally, the layer 1 measurement parameters include at least one of the following: the identifier of the measurement event, the threshold of the measurement event, the hysteresis value of the measurement event, the trigger time of the measurement event, and the bias value of the measurement event.

[0017] Optionally, the communication method further includes: sending information about candidate cells and / or handover conditions for layer 3, wherein the information about candidate cells and / or handover conditions for layer 3 are used to determine the layer 1 measurement parameters.

[0018] Optionally, the communication method further includes: sending a second message, the second message indicating adjustment of the layer 1 measurement parameters; and receiving a third message, the third message indicating confirmation of adjustment of the layer 1 measurement parameters, or denial of adjustment of the layer 1 measurement parameters.

[0019] Optionally, the communication method further includes sending the Layer 1 measurement parameters to the terminal device.

[0020] Thirdly, a communication method is provided for use on the terminal device side. The communication method includes receiving Layer 1 measurement parameters, which are used for LTM switching or Layer 1 measurement reporting.

[0021] Optionally, the Layer 1 measurement parameters include at least one of the following: a switching condition, a first condition, or first information, wherein the switching condition is used to trigger LTM switching, the first condition is used to trigger early synchronization or TA acquisition, and the first information is used to configure Layer 1 measurement reporting.

[0022] Optionally, the communication method further includes: sending layer 1 measurement results according to the first information; or, switching from a source cell to a target cell, wherein the signal quality of the source cell and / or the target cell meets the switching conditions.

[0023] Fourthly, a communication device is provided for use on the distribution unit side. The communication device includes a communication module for sending layer 1 measurement parameters, which are used for LTM switching or layer 1 measurement reporting.

[0024] Fifthly, a communication device is provided for use on the central unit side. The communication device includes: a communication module for receiving Layer 1 measurement parameters, which are used for LTM switching or Layer 1 measurement reporting.

[0025] In a sixth aspect, a communication device is provided, applied to a terminal device side, the communication device comprising: a communication module for receiving Layer 1 measurement parameters, the Layer 1 measurement parameters being used for LTM switching or Layer 1 measurement reporting.

[0026] In a seventh aspect, a computer-readable storage medium is provided having a computer program stored thereon, the computer program being executed by a processor to perform any one of the methods provided in the first, second, or third aspect.

[0027] Eighthly, a communication device is provided, including a memory and a processor, wherein the memory stores a computer program executable on the processor, and the processor executes the computer program to perform any of the methods provided in the first aspect.

[0028] A ninth aspect provides a communication device including a memory and a processor, wherein the memory stores a computer program executable on the processor, and the processor executes the computer program to perform any of the methods provided in the second aspect.

[0029] In a tenth aspect, a communication device is provided, including a memory and a processor, wherein the memory stores a computer program executable on the processor, and the processor executes the computer program to perform any of the methods provided in the third aspect.

[0030] Eleventhly, a computer program product is provided, on which a computer program is stored, the computer program being executed by a processor to perform any one of the methods provided in the first, second, or third aspects.

[0031] In a twelfth aspect, a communication system is provided, including the aforementioned terminal equipment, the aforementioned distribution unit, and the aforementioned central unit.

[0032] In a thirteenth aspect, embodiments of this application also provide a chip that stores a computer program, which, when executed by the chip, implements the steps of the above-described method.

[0033] In a fourteenth aspect, embodiments of this application also provide a system chip for use in a terminal. The chip system includes at least one processor and an interface circuit, the interface circuit and the at least one processor being interconnected via a line. The at least one processor is used to execute instructions to perform any one of the methods provided in the first aspect, the second aspect, or the third aspect.

[0034] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0035] In this technical solution, the distributed unit sends Layer 1 measurement parameters, which are used for LTM handover or Layer 1 measurement reporting. In this solution, the handover decision and the configuration of Layer 1 measurement parameters during LTM handover are both completed by the distributed unit, ensuring the rationality of the Layer 1 measurement parameters. When the terminal device performs LTM handover or reports Layer 1 measurements, it can report more reasonable measurement results, thereby achieving more reasonable LTM handover, avoiding frequent handovers or handover failures, and improving the handover success rate.

[0036] Furthermore, in the technical solution of this application, the Layer 1 measurement parameters may include at least one of the following: a handover condition, a first condition, or first information. The handover condition among the Layer 1 measurement parameters allows the terminal device to trigger conditional LTM handover based on the Layer 1 measurement results, ensuring smooth LTM handover even when the terminal device signal fluctuates significantly. The first condition triggers advance synchronization or timed advance TA acquisition, aligning the uplink information arrival times between different terminal devices. The first information completes the configuration of handover-related parameters, ensuring smooth handover. Attached Figure Description

[0037] Figure 1 This is an interactive flowchart of a communication method provided in an embodiment of this application;

[0038] Figure 2 This is an interactive flowchart of another communication method provided in an embodiment of this application;

[0039] Figure 3 This is an interactive flowchart of another communication method provided in the embodiments of this application;

[0040] Figure 4 This is an interactive flowchart of another communication method provided in the embodiments of this application;

[0041] Figure 5 This is an interactive flowchart of another communication method provided in the embodiments of this application;

[0042] Figure 6 This is an interactive flowchart of another communication method provided in the embodiments of this application;

[0043] Figure 7 This is an interactive flowchart of another communication method provided in the embodiments of this application;

[0044] Figure 8 This is an interactive flowchart of another communication method provided in the embodiments of this application;

[0045] Figure 9 This is an interactive flowchart of another communication method provided in the embodiments of this application;

[0046] Figure 10 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0047] Figure 11 This is a schematic diagram of the hardware structure of a communication device provided in an embodiment of this application. Detailed Implementation

[0048] The communication systems applicable to the embodiments of this application include, but are not limited to, Long Term Evolution (LTE) systems, 5th-generation (5G) systems, New Radio (NR) systems, and future evolution systems or multiple converged communication systems. The 5G system can be a non-standalone (NSA) 5G system or a standalone (SA) 5G system. The technical solutions of this application are also applicable to different network architectures, including but not limited to relay network architectures, dual-connectivity architectures, and vehicle-to-everything (V2X) communication architectures.

[0049] This application primarily relates to communication between terminal devices and network devices. Specifically:

[0050] The network device in this application embodiment can also be called an access network device, for example, it can be a base station (BS) (also called a base station device). A network device is a device deployed in a radio access network (RAN) to provide wireless communication functions. For example, in second-generation (2G) networks, the equipment providing base station functionality includes base transceiver stations (BTS); in third-generation (3G) networks, it includes nodes (NodeB); in fourth-generation (4G) networks, it includes evolved nodes (eNB); in wireless local area networks (WLANs), it includes access points (APs); and in NR, it includes next-generation node base stations (gNBs) and further evolved nodes (ng-eNBs). gNBs communicate with terminal devices using NR technology, while ng-eNBs communicate with terminal devices using evolved universal terrestrial radio access (E-UTRA) technology. Both gNBs and ng-eNBs can connect to the 5G core network. The network devices in this application embodiment also include devices that provide base station functions in future new communication systems.

[0051] Furthermore, network equipment can be divided into central units and distributed units; terminal devices access the core network (CN) through central units and distributed units to access services. The central unit can also be called a centralized control unit, and the distributed unit can be called a distributed control unit. The RAN and core network can evolve independently, and the RAN can shield the CN from the impact of various access terminations. The user plane and control plane of the radio access network are completely decoupled, supporting distributed deployment. A central unit may connect to multiple distributed units.

[0052] Specifically, the central unit includes an Access Convergence Control plane (ACC), an Access Convergence User plane (A Central Unit), and a Radio Access Control plane Function for User (RAC-User), used to manage the non-real-time control components of multiple standards. The distribution unit includes a Radio Access Control plane Function for Cell (RAC-Cell) and a Radio Access User plane Function (RAU), used to manage the real-time control components of each standard. The Access Convergence Control plane manages the control plane of the sites for the multiple standards; the Access Convergence User plane manages the user plane of the sites for the multiple standards; and the Radio Access Control plane for User manages the user's radio connections. The central unit is primarily responsible for user-level Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP). The wireless access layer control plane for a cell is used for cell management; the wireless access layer user plane is used for data transmission and scheduling coordination control; the central unit may also connect to multiple distribution units.

[0053] Specifically, depending on the access network type, the distribution unit can be divided into Long Term Evolution (LTE) distribution units and New Radio (NR) system distribution units. The LTE distribution unit includes two functions: LTE RAC-Cell and LTE RAU. The NR distribution unit includes two functions: NR RAC-Cell and LTE RAU. The distribution unit is mainly responsible for the real-time control part of each standard, such as: cell-level RRC, Radio Link Control (RLC), Medium Access Control (MAC), and Physical Layer (PHY).

[0054] Specifically, the interface between the central unit and the distributed unit is the first interface, which includes a control plane first interface and a user plane first interface. The protocol stack of the control plane first interface is based on the application protocol and flow control transmission protocol of the first interface, and is used for signaling transmission between the central unit and the distributed unit. The protocol stack of the user plane first interface is based on the General Packet Radio Service Tunneling Protocol, Transmission Control Protocol and User Datagram Protocol, and is used for data transmission between the central unit and the distributed unit.

[0055] In this application, "terminal equipment" can refer to various forms of access terminals, user units, user stations, mobile stations, mobile stations (MS), remote terminals, mobile devices, user terminals, wireless communication devices, user agents, or user devices. Terminal equipment can also be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), handheld devices with wireless communication capabilities, computing devices, or other processing devices connected to a wireless modem, in-vehicle devices, wearable devices, terminal equipment in future 5G networks, or terminal equipment in future evolved Public Land Mobile Networks (PLMNs), etc. This application does not limit the scope of these terms. Terminal equipment can also be referred to as User Equipment (UE), terminal, etc.

[0056] To facilitate understanding of the technical solution of this application, a brief introduction to the relevant technologies involved in this application will be given first.

[0057] Currently, NR introduces Conditional Handover (CHO) to prevent the original base station from failing to promptly issue handover commands to the terminal device due to drastic signal changes. Therefore, based on the terminal device's measurement reports, the gNB-central unit pre-configures one or more candidate cells and their related configurations, along with handover conditions. When the handover conditions are met, the terminal device directly switches to one of the candidate cells. Specifically, the terminal device initiates a random access procedure in the target cell, sends a Radio Resource Control (RRC) reconfiguration completion message, and then notifies the original base station to release the terminal device's connection.

[0058] Specifically, the handover conditions may include relevant event evaluation based on signal quality such as Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), and Signal to Interference plus Noise Ratio (SINR). The handover event in the handover conditions may be event A3, event A4, or event A5.

[0059] Among them, the A3 event indicates that the signal quality of the neighboring cell is better than that of the primary cell (Spcell) in the master or secondary cell group, and the better signal quality is by a certain offset. Specifically, it is shown in the following formula (1):

[0060] Mn + Ofn + Ocn – Hys > Mp + Ofp + Ocp + Off, (1)

[0061] Where Mn is the measurement result of the neighboring cell, Ofn and Ocn are the offset values ​​of the neighboring cell configured by the network; Mp is the measurement result of the Spcell, Ofp and Ocp are the offset values ​​of the Spcell, and Off represents a certain offset as mentioned above. In conditional handover, when the signal quality of the candidate cell meets the above threshold, it is considered to meet the A3 event, and handover to the corresponding candidate neighboring cell can be triggered.

[0062] Among them, event A4 indicates that the measurement result of the neighboring cell is greater than the threshold. Specifically, as shown in formula (2) below:

[0063] Mn + Ofn + Ocn – Hys > Thresh, (2)

[0064] Where Mn represents the measurement result of the neighboring cell, Ofn and Ocn are the bias values ​​of the neighboring cells configured by the network, Hys represents the hysteresis value configured by the network, and Thresh represents the threshold configured by the network. During conditional handover, when the quality of the candidate cell meets the above thresholds, it is considered that the A4 event is satisfied, and handover to the corresponding candidate neighboring cell can be triggered.

[0065] An A5 event indicates that the signal quality of Spcell is below threshold 1, while the signal quality of neighboring cells is above threshold 2. This is specifically illustrated in formulas (3) and (4) below:

[0066] Mp + Hys < Thresh1, (3)

[0067] Mn + Ofn + Ocn – Hys > Thresh2, (4)

[0068] Where Mp is the measurement result of Spcell, Hys represents the hysteresis value configured by the network, Mn is the measurement result of neighboring cells, Ofn and Ocn are the bias values ​​of neighboring cells configured by the network, Thresh1 represents the threshold 1 configured by the network, and Thresh2 represents the threshold 2 configured by the network. In conditional handover, when the signal quality of the candidate cell meets the above formula (4) and the signal quality of Pcell or PSCell meets the above formula (3), it is considered that the A5 event is satisfied, and handover to the corresponding candidate neighboring cell can be triggered. If both A3 and A5 events are configured at the same time, both conditions must be satisfied before handover to the candidate cell can be initiated.

[0069] Specifically, the measurement results in the different events mentioned above are all Layer 3 measurement results. The L1 measurement results need to be filtered by L3 before they can be used to determine whether the triggering conditions for event reporting are met.

[0070] In subsequent discussions, LTM (Low-Time Measuring) was introduced, which triggers handover via L2 signaling based on L1 measurement results. In this process, L1 measurement results are reported periodically or triggered by network devices. This may result in multiple reports even when handover conditions are not met, wasting reporting resources and failing to report L1 measurement results in a timely manner. Therefore, event-triggered measurement reporting based on L1 measurement results was introduced. That is, when the L1 measurement results obtained by the terminal device meet certain conditions, a measurement report is triggered to notify the network device. Currently, L1 measurement events include: LTM Event 2, LTM Event 3, LTM Event 4, and LTM Event 5.

[0071] LTM event 2 indicates that the serving cell's beam quality is below absolute threshold 1. LTM event 3 indicates that the candidate cell's beam quality is better than the serving cell's beam quality by a preset offset. LTM event 4 indicates that the candidate cell's beam quality is above absolute threshold 2. LTM event 5 indicates that the serving cell's beam quality is below absolute threshold 1, and the candidate cell's beam quality is above absolute threshold 2.

[0072] During LTM handover, an advance synchronization process, also known as a timed advance TA acquisition procedure, is introduced. Before initiating an LTM handover, the network device requests the terminal device to send a preamble to one or more candidate cells via a PDCCH order. The target cell determines the TA value of the terminal device in that candidate cell using the received preamble and notifies the original distribution unit (ODU). In the handover command, the ODU can then send the obtained TA to the terminal device, allowing the terminal device to initiate a Random Access Channel (RACHless) handover in the target cell. The network device can trigger the advance synchronization process by receiving L1 measurement results from the terminal device, or it can pre-configure LTM events as trigger conditions. When these conditions are met, the terminal device automatically initiates the advance synchronization process.

[0073] As described in the background section, improving the success rate of LTM handover is a technical problem that urgently needs to be solved.

[0074] In addition, considering the introduction of conditional switching in LTM switching, how to configure switching conditions and other parameters in conditional LTM switching is a technical problem that urgently needs to be solved.

[0075] Specifically, in Layer 3 conditional handover, the central unit pre-configures handover conditions for the terminal device via RRC, and the terminal device triggers conditional handover after evaluating whether the handover conditions are met. If the Layer 3 conditional handover configuration mechanism is used, in conditional LTM handover, the central unit pre-configures handover conditions for the terminal device, while LTM handover is decided by the distributed unit based on the Layer 1 measurement results. If the handover conditions configured by the central unit are inappropriate, handover failure will occur.

[0076] Furthermore, currently, measurement events are configured by the central unit for the terminal devices, while LTM handover is decided by the distributed unit based on the measurement results of Layer 1. Inappropriate measurement events configured by the central unit will lead to handover failure.

[0077] In the technical solution of this application, the handover decision and the configuration of Layer 1 measurement parameters during LTM handover are both completed by the distributed unit, which can ensure the rationality of the Layer 1 measurement parameters. When the terminal device performs LTM handover or reports Layer 1 measurements, it can report more reasonable measurement results, thereby achieving more reasonable LTM handover, avoiding frequent handover or handover failure, and improving the handover success rate.

[0078] The term "conditional LTM switching" used in the embodiments of this application may also be referred to as "LTM condition switching," and this application does not impose any restrictions on it.

[0079] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, specific embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0080] This invention provides a communication method, referring to... Figure 1 The following will provide a detailed explanation through specific steps.

[0081] It is understood that, in specific implementations, the communication method can be implemented using a software program, which runs in a processor integrated within the chip or chip module. The method can also be implemented using a combination of software and hardware; this application does not impose any restrictions.

[0082] In step 101, the distribution unit sends the Layer 1 measurement parameters. Correspondingly, the central unit receives the Layer 1 measurement parameters. Specifically, the distribution unit can send the Layer 1 measurement parameters through the interface between the distribution unit and the central unit. Layer 1 can be Layer 1, L1, or the physical layer.

[0083] In step 102, the central unit sends the Layer 1 measurement parameters. Correspondingly, the terminal device receives the Layer 1 measurement parameters. Specifically, the Layer 1 measurement parameters can be carried in an RRC message and sent to the terminal device.

[0084] Furthermore, the central unit can send the configuration information of the candidate cells along with the Layer 1 measurement parameters to the terminal device.

[0085] It should be noted that the sequence number of each step in this embodiment does not represent a limitation on the execution order of each step.

[0086] In a non-limiting embodiment, Layer 1 measurement parameters can be used for Layer 1 measurement reporting. The terminal device can trigger Layer 1 measurement reporting based on the Layer 1 measurement parameters.

[0087] In practice, the Layer 1 measurement parameters may include first information, which is used to configure Layer 1 measurement reporting. Specifically, the first information may indicate relevant information about L1 measurement events.

[0088] In one specific embodiment, the first information may include at least one of the following: an identifier of the measurement event, a threshold of the measurement event, a hysteresis value of the measurement event, a trigger time of the measurement event, and an offset value of the measurement event. The identifier of the measurement event may indicate a specific measurement event; for example, identifier 2 indicates LTM event 2, identifier 3 indicates LTM event 3, identifier 4 indicates LTM event 4, and identifier 5 indicates LTM event 5. The threshold of the measurement event represents a threshold value for measuring signal quality, such as Thresh in the aforementioned formula (2), Thresh3 in the aforementioned formula (3), and Thresh2 in the aforementioned formula (4). The hysteresis value of the measurement event represents the offset from the measurement value of a neighboring cell or the primary cell, such as the hysteresis value Hys in the aforementioned formulas (2), (3), and (4). The offset value represents the offset from the measurement value of a neighboring cell or the primary cell, such as Ofn, Ocn, Ofp, and Ocp in the aforementioned formula (2). The trigger time of a measurement event indicates that the L1 measurement result will only trigger an L1 measurement report or be considered to meet the triggering conditions based on Layer 1 if the measurement event is continuously met within that time period.

[0089] Please refer to Figure 2 , Figure 2 A communication method is disclosed, which illustrates the specific process by which Layer 1 measurement parameters can be used for Layer 1 measurement reporting.

[0090] In step 201, the distribution unit transmits the layer 1 measurement parameters. Correspondingly, the central unit receives the layer 1 measurement parameters.

[0091] In step 202, the central unit sends the layer 1 measurement parameters. Correspondingly, the terminal device receives the layer 1 measurement parameters.

[0092] In step 203, in response to the Layer 1 measurement result satisfying the first information, the terminal device reports the Layer 1 measurement result. Accordingly, the distribution unit receives the Layer 1 measurement result.

[0093] Specifically, the first information may include multiple measurement events. A Layer 1 measurement result satisfying the first information indicates that the Layer 1 measurement result satisfies at least one of the multiple measurement events. For example, if the first information includes LTM event 3 and LTM event 4, and the Layer 1 measurement result satisfies LTM event 3, the terminal device can report the Layer 1 measurement result. As another example, if the first information includes LTM event 3 and LTM event 4, and the Layer 1 measurement result satisfies both LTM event 3 and LTM event 4, the terminal device can report the Layer 1 measurement result.

[0094] In step 204, the distribution unit sends a second command. Correspondingly, the terminal device receives the second command, which instructs the terminal device to perform an LTM handover.

[0095] The second command, also known as the handover instruction, carries the identifier of the target cell.

[0096] Furthermore, the second command may also include at least one of the following: TA (Transmission Configuration Indication), and a Transmission Configuration Indication (TCI) status identifier. The TCI status is used by the terminal device to determine the Synchronization Signal Block (SSB), i.e., to determine the beam.

[0097] If the second command includes a TA (Target Access Message), the terminal device can wait for the target cell to schedule directly via the Physical Downlink Control Channel (PDCCH) and send a complete message through dynamic scheduling, without needing to perform a random access procedure in the target cell. After the terminal device confirms that the network device has received the first data transmission, it considers the LTM handover successful; alternatively, it can use the pre-configured Configured Grant (CG) resources and send uplink information using the CG resources associated with the beam indication received in the second command. If the second command does not include a TA, a random access procedure needs to be performed in the target cell to complete synchronization and obtain the TA and beam information.

[0098] In a non-limiting embodiment, Layer 1 measurement parameters can be used to trigger early synchronization or timing advance (TA) acquisition. The terminal device can trigger early synchronization or timing advance acquisition based on the Layer 1 measurement parameters. That is, the network device configures the Layer 1 measurement parameters as conditions to trigger early synchronization or timing advance acquisition; if the Layer 1 measurement result measured by the terminal device meets the conditions for triggering early synchronization or timing advance acquisition, then early synchronization or timing advance acquisition is triggered.

[0099] In specific implementation, the Layer 1 measurement parameters may include a first condition. The first condition may include at least one of the following: the identifier of the measurement event, the threshold of the measurement event, the hysteresis value of the measurement event, the trigger time of the measurement event, and the bias value of the measurement event.

[0100] For example, the layer 1 measurement parameters may include LTM event 2, the absolute threshold 1 of LTM event 2, the hysteresis value of LTM event 2, and the trigger time of LTM event 2.

[0101] For example, Layer 1 measurement parameters may include LTM event 5, absolute threshold 1 of LTM event 5, absolute threshold 2 of LTM event 5, hysteresis value of LTM event 5, and trigger time of LTM event 5. It should be noted that Layer 1 measurement parameters may include one or more LTM events and one or more event-related parameters, such as event threshold, hysteresis value, trigger time, and bias value.

[0102] Please refer to Figure 3 , Figure 3 A communication method is disclosed, which illustrates the specific process by which Layer 1 measurement parameters can be used to trigger advance synchronization or TA acquisition.

[0103] In step 301, the distribution unit transmits the layer 1 measurement parameters. Correspondingly, the central unit receives the layer 1 measurement parameters.

[0104] In step 302, the central unit sends the Layer 1 measurement parameters. Correspondingly, the terminal device receives the Layer 1 measurement parameters.

[0105] In step 303, in response to the Layer 1 measurement result satisfying the first information, the terminal device reports the Layer 1 measurement result. Accordingly, the distribution unit receives the Layer 1 measurement result.

[0106] Specifically, the first information may include multiple measurement events. A Layer 1 measurement result satisfying the first information indicates that the Layer 1 measurement result satisfies at least one of the multiple measurement events. For example, if the first information includes LTM event 3 and LTM event 4, and the Layer 1 measurement result satisfies LTM event 3, the terminal device can report the Layer 1 measurement result. As another example, if the first information includes LTM event 3 and LTM event 4, and the Layer 1 measurement result satisfies both LTM event 3 and LTM event 4, the terminal device can report the Layer 1 measurement result.

[0107] In step 304, the distribution unit sends a first command. Correspondingly, the terminal device receives the first command, which is used to trigger the terminal device to perform advance synchronization.

[0108] Specifically, the first command can be the PDCCH command (order).

[0109] In this embodiment, the network device can request the terminal device to synchronize with one or more candidate cells in advance before handover. The first command may include non-contention-based preamble information of the target cell, which is used by the terminal device to send the preamble in the target cell without waiting to receive a Random Access Response (RAR). The network device obtains the TA of the terminal device by receiving the preamble, and the target cell will notify the source cell of the TA value.

[0110] In a non-limiting embodiment, Layer 1 measurement parameters can be used for conditional LTM switching. The terminal device can trigger conditional LTM switching based on the Layer 1 measurement parameters.

[0111] In practice, the Layer 1 measurement parameters may include handover conditions. In response to the Layer 1 measurement results meeting the handover conditions, the terminal device performs Layer 1 measurement parameter LTM handover, switching from the source cell to the target cell.

[0112] Specifically, the switching condition can be at least one of the following events: LTM event 2, LTM event 3, LTM event 4, and LTM event 5.

[0113] For example, if the handover condition is LTM event 4, then when the Layer 1 measurement result of neighboring cell 1 is greater than the threshold and the trigger time is met, the terminal device will handover from the source cell to neighboring cell 1.

[0114] In one specific embodiment, the switching condition may include at least one of the following: the identifier of the measurement event, the threshold of the measurement event, the hysteresis value of the measurement event, the trigger time of the measurement event, and the bias value of the measurement event.

[0115] Please refer to Figure 4 , Figure 4 A communication method is disclosed, which illustrates the specific process of using Layer 1 measurement parameters for conditional LTM switching.

[0116] In step 401, the source distribution unit sends the layer 1 measurement parameters. Correspondingly, the source center unit receives the layer 1 measurement parameters. The source distribution unit represents the distribution unit to which the terminal device is connected, and the source center unit represents the center unit to which the terminal device is connected.

[0117] In step 402, the source center unit transmits the layer 1 measurement parameters. Correspondingly, the terminal device receives the layer 1 measurement parameters.

[0118] In this case, the Layer 1 measurement parameters sent by the source center unit are consistent with the Layer 1 measurement parameters sent by the source distribution unit, or the source center unit makes at least partial adjustments to the received Layer 1 measurement parameters before sending them out.

[0119] In step 403, in response to the Layer 1 measurement results meeting the handover conditions, the terminal device performs LTM handover. That is, the terminal device hands over from the source cell to the target cell, or in other words, the terminal device hands over from the source distribution unit to the target distribution unit.

[0120] For example, the Layer 1 measurement results satisfy the handover condition that the signal quality of the source cell is below the absolute threshold 1.

[0121] For example, the Layer 1 measurement results satisfy the handover condition that the signal quality of the target cell is higher than the absolute threshold 2.

[0122] For example, the Layer 1 measurement results satisfy the handover condition that the signal quality of the source cell is lower than absolute threshold 1 and the signal quality of the target cell is higher than absolute threshold 2.

[0123] In the above embodiments, the handover decision and the configuration of Layer 1 measurement parameters during LTM handover are both completed by the distributed unit, ensuring the rationality of the Layer 1 measurement parameters. Furthermore, in this embodiment, the distributed unit first sends the Layer 1 measurement parameters to the central unit, meaning that the central unit also becomes aware of the Layer 1 measurement parameters. Since the central unit configures candidate cells for the terminal device, knowing the Layer 1 measurement parameters allows for more reasonable candidate cell configuration, which helps the terminal device report more reasonable measurement results and more reasonable LTM handover, thus improving the handover success rate.

[0124] In a non-limiting embodiment, to enable the distribution unit to configure more reasonable Layer 1 measurement parameters, the central unit can provide auxiliary reference information to the distribution unit. Specifically, the central unit can send candidate cell information, Layer 3 handover conditions, and / or Layer 3 early synchronization conditions to the distribution unit. The distribution unit determines the Layer 1 measurement parameters based on the candidate cell information, Layer 3 handover conditions, and / or Layer 3 early synchronization conditions. Specifically, it can determine the values ​​of the Layer 1 measurement parameters. For example, the handover conditions can be determined by referring to the Layer 3 handover conditions, i.e., the identifier of the measurement event, the threshold of the measurement event, the hysteresis value of the measurement event, the trigger time of the measurement event, the bias value of the measurement event, etc.

[0125] Please refer to the details. Figure 5 , Figure 5 The flowchart of a communication method is shown.

[0126] In step 501, the central unit sends information about the candidate cells and / or the handover conditions for Layer 3 and / or the conditions for advance synchronization of Layer 3. Correspondingly, the distribution unit receives the information about the candidate cells and / or the handover conditions for Layer 3.

[0127] Specifically, the information of the candidate cell can be the candidate cell identifier; the handover conditions of Layer 3 can include at least one of the following: the identifier of the handover event, the threshold of the handover event, the hysteresis value of the handover event, the trigger time of the handover event, and the bias value of the handover event; the conditions for early synchronization of Layer 3 can include at least one of the following: the identifier of the handover event, the threshold of the handover event, the hysteresis value of the handover event, the trigger time of the handover event, and the bias value of the handover event.

[0128] More specifically, the switching event can be an A3 event, an A4 event, and / or an A5 event.

[0129] In step 502, the distribution unit sends the Layer 1 measurement parameters. Correspondingly, the central unit receives the Layer 1 measurement parameters. Specifically, the distribution unit can send the Layer 1 measurement parameters through the interface between the distribution unit and the central unit.

[0130] In step 503, the central unit sends the Layer 1 measurement parameters. Correspondingly, the terminal device receives the Layer 1 measurement parameters.

[0131] In this case, the Layer 1 measurement parameters sent by the central unit are consistent with the Layer 1 measurement parameters sent by the distribution unit, or the central unit makes at least a partial adjustment to the received Layer 1 measurement parameters before sending them out.

[0132] Those skilled in the art will understand that steps 502 to 503 can be considered as the above. Figure 1 The execution steps 101 to 102 in the illustrated embodiment correspond to each other, and they are complementary in their specific implementation principles and logic. Therefore, the explanations of the terms involved in this embodiment can be found by referring to... Figure 1 The relevant descriptions of the embodiments shown will not be repeated here.

[0133] In a non-limiting embodiment, to configure the distribution unit with more reasonable Layer 1 measurement parameters, the central unit can also adjust the Layer 1 measurement parameters and negotiate with the distribution unit to confirm whether to adjust the Layer 1 measurement parameters. Please refer to [link / reference] for details. Figure 6 , Figure 6 The flowchart of a communication method is shown.

[0134] In step 601, the distribution unit transmits the layer 1 measurement parameters. Correspondingly, the central unit receives the layer 1 measurement parameters.

[0135] In step 602, the central unit sends a second message. The second message indicates the adjustment of the measurement parameters of layer 1. Accordingly, the distribution unit receives the second message.

[0136] In practice, the second information indicates that the measurement parameters of the adjustment layer 1 can be added, deleted, or the values ​​of specific parameters can be updated.

[0137] Specifically, the second information may only indicate the adjustment of the measurement parameters of layer 1; or, the second information may carry the specific parameter values ​​that need to be adjusted.

[0138] For example, the distributed unit sends the measurement parameters of layer 1, which include the identifier 1 of LTM event 1, the threshold 1 of LTM event 1, and the trigger time 1 of LTM event 1. The central unit believes that the threshold 1 of LTM event 1 needs to be adjusted to the threshold 2. Then the central unit sends the second information to the distributed unit, which includes the threshold 2.

[0139] In step 603, the distribution unit sends a third message. The third message indicates whether to confirm or deny the adjustment of the measurement parameters of layer 1. Correspondingly, the central unit receives the second message.

[0140] Specifically, the third message can confirm all adjustment layer 1 measurement parameters; in this case, the third message can be an acknowledgment (ACK). Alternatively, the third message can deny all adjustment layer 1 measurement parameters; in this case, the third message can be a negative acknowledgment (NACK).

[0141] Specifically, the third information can also confirm the adjustment of some layer 1 measurement parameters. In this case, the third information can carry either the parameter that is confirmed to be adjusted or the parameter that is denied to be adjusted. For example, if the central unit instructs to adjust threshold 1 of LTM event 1 to threshold 2, and the trigger time 1 of LTM event 1 to trigger time 2, and the distribution unit confirms that threshold 1 of LTM event 1 is adjusted to threshold 2, the third information can carry threshold 2 of LTM event 1.

[0142] Specifically, if the central unit needs to adjust the Layer 1 measurement parameters initially configured by the distributed unit, it can send a second message to the distributed unit requesting adjustment of the Layer 1 measurement parameters. The distributed unit then makes the final decision and sends a third message for confirmation. This ensures that both the distributed unit and the central unit are aware of the adjustment status of the Layer 1 measurement parameters, guaranteeing a smooth LTM handover.

[0143] In step 604, the central unit sends the Layer 1 measurement parameters. Correspondingly, the terminal device receives the Layer 1 measurement parameters. Wherein, if the third information confirms the adjustment of the Layer 1 measurement parameters, the Layer 1 measurement parameters in step 604 are the Layer 1 measurement parameters adjusted by the central unit; if the third information denies the adjustment of the Layer 1 measurement parameters, the Layer 1 measurement parameters in step 604 are consistent with the Layer 1 measurement parameters in step 601.

[0144] In the foregoing embodiments, since the terminal device is connected to the source central unit, the source distribution unit can forward the Layer 1 measurement parameters to the terminal device via the source central unit. In a variation, the candidate distribution unit can also configure the Layer 1 measurement parameters for the terminal device. Please refer to [link / reference] for details. Figure 7 , Figure 7 The specific interaction process is shown.

[0145] In step 701, the candidate distribution unit sends the layer 1 measurement parameters. Correspondingly, the candidate center unit receives the layer 1 measurement parameters.

[0146] In step 702, the candidate center unit sends the Layer 1 measurement parameters. Correspondingly, the source center unit receives the Layer 1 measurement parameters. Specifically, the candidate center unit can send the Layer 1 measurement parameters through the interface between the candidate center unit and the source center unit.

[0147] In this case, the Layer 1 measurement parameters sent by the candidate center unit are consistent with the Layer 1 measurement parameters sent by the candidate distribution unit, or the candidate center unit makes at least partial adjustments to the received Layer 1 measurement parameters before sending them out.

[0148] In step 703, the source center unit transmits the layer 1 measurement parameters. Correspondingly, the terminal device receives the layer 1 measurement parameters.

[0149] In this case, the Layer 1 measurement parameters sent by the source center unit are consistent with the Layer 1 measurement parameters sent by the candidate center unit, or the source center unit makes at least partial adjustments to the received Layer 1 measurement parameters before sending them out.

[0150] In a non-limiting embodiment, the distribution unit may also forward the Layer 1 measurement parameters without going through the central unit; the distribution unit can directly send the Layer 1 measurement parameters to the terminal device. Please refer to [link / reference] for details. Figure 8 , Figure 8 The specific interaction process is shown.

[0151] In step 801, the source distribution unit transmits the layer 1 measurement parameters. Correspondingly, the terminal device receives the layer 1 measurement parameters.

[0152] In this embodiment, since the terminal device is connected to the source distribution unit, the source distribution unit can directly send Layer 1 measurement parameters to the terminal device. Specifically, the Layer 1 measurement parameters can be carried in a MAC control element (CE) and sent to the terminal device. Alternatively, the Layer 1 measurement parameters can be carried in downlink control information (DCI) and sent to the terminal device.

[0153] In one variation, the candidate distribution unit can configure Layer 1 measurement parameters for the terminal device. Please refer to [link / reference] for details. Figure 9 , Figure 9 The specific interaction process is shown.

[0154] In step 901, the candidate distribution unit transmits the layer 1 measurement parameters. Correspondingly, the candidate center unit receives the layer 1 measurement parameters.

[0155] In step 902, the candidate center unit sends the Layer 1 measurement parameters. Correspondingly, the source center unit receives the Layer 1 measurement parameters. Specifically, the candidate center unit can send the Layer 1 measurement parameters through the interface between the candidate center unit and the source center unit.

[0156] In this case, the Layer 1 measurement parameters sent by the candidate center unit are consistent with the Layer 1 measurement parameters sent by the candidate distribution unit, or the candidate center unit makes at least partial adjustments to the received Layer 1 measurement parameters before sending them out.

[0157] In step 903, the source center unit transmits the layer 1 measurement parameters. Correspondingly, the source distribution unit receives the layer 1 measurement parameters.

[0158] In this case, the Layer 1 measurement parameters sent by the source center unit are consistent with the Layer 1 measurement parameters sent by the candidate center unit, or the source center unit makes at least partial adjustments to the received Layer 1 measurement parameters before sending them out.

[0159] In step 904, the source distribution unit transmits the layer 1 measurement parameters. Correspondingly, the terminal device receives the layer 1 measurement parameters.

[0160] In this case, the Layer 1 measurement parameters sent by the source distribution unit are consistent with the Layer 1 measurement parameters sent by the source center unit, or the source distribution unit makes at least partial adjustments to the received Layer 1 measurement parameters before sending them out.

[0161] Those skilled in the art will understand that steps 901 to 902 can be considered as the above. Figure 7 The execution steps S701 to S702 in the illustrated embodiment correspond to each other, and they are complementary in their specific implementation principles and logic. Therefore, the explanation of the terms involved in this embodiment can be found by referring to... Figure 7 The relevant descriptions of the embodiments shown will not be repeated here.

[0162] Please refer to Figure 10 , Figure 10 A communication device 100 is shown, which may include:

[0163] The communication module 1001 is used to receive Layer 1 measurement parameters, which are used for LTM switching or Layer 1 measurement reporting.

[0164] In a non-limiting embodiment, the communication module 1001 may also be used to send the layer 1 measurement results according to the first information.

[0165] In a non-limiting embodiment, the communication module 1001 can also be used to switch from a source cell to a target cell, wherein the signal quality of the source cell and / or the target cell meets the switching conditions.

[0166] In specific implementations, the aforementioned communication device 100 may correspond to a chip with communication function in a terminal device, such as a system-on-a-chip (SOC), a baseband chip, etc.; or to a chip module in a terminal device that includes a chip with communication function; or to a chip module with a chip with data processing function; or to a terminal device.

[0167] In a non-limiting embodiment, the communication module 1001 can also be used to receive measurement parameters from layer 1.

[0168] In a non-limiting embodiment, the communication module 1001 can also be used to receive measurement results from layer 1.

[0169] In a non-limiting embodiment, the communication module 1001 may also be used to send a first command in response to the layer 1 measurement result satisfying a first condition.

[0170] In a non-limiting embodiment, the communication module 1001 may also be used to receive information about candidate cells and / or Layer 3 handover conditions.

[0171] In a non-limiting embodiment, the communication module 1001 can also be used to receive second information, the second information indicating the adjustment layer 1 measurement parameters. The communication module 1001 can also be used to send third information, the third information indicating confirmation of the adjustment layer 1 measurement parameters, or denial of the adjustment layer 1 measurement parameters.

[0172] In specific implementations, the aforementioned communication device 100 may correspond to a chip with communication function in a network device (e.g., a distribution unit or a central unit), such as a SOC, a baseband chip, etc.; or to a chip module in a network device that includes a chip with communication function; or to a chip module with a chip having data processing function; or to a network device.

[0173] Other relevant descriptions of the communication device 100 can be found in the descriptions in the foregoing embodiments, and will not be repeated here.

[0174] Regarding the modules / units included in the various devices and products described in the above embodiments, they can be software modules / units, hardware modules / units, or a combination of both. For example, for devices and products applied to or integrated into a chip, all modules / units can be implemented using hardware methods such as circuits, or at least some modules / units can be implemented using software programs running on a processor integrated within the chip, while the remaining (if any) modules / units can be implemented using hardware methods such as circuits. For devices and products applied to or integrated into a chip module, all modules / units can be implemented using hardware methods such as circuits. Different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or different components of the chip module, or at least some modules / units can be implemented using hardware methods such as circuits. The implementation is achieved through a software program that runs on a processor integrated within the chip module. The remaining modules / units (if any) can be implemented using hardware methods such as circuits. For various devices and products applied to or integrated into terminal equipment, each of their modules / units can be implemented using hardware methods such as circuits. Different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or different components within the terminal equipment. Alternatively, at least some modules / units can be implemented using a software program that runs on a processor integrated within the terminal equipment, while the remaining modules / units (if any) can be implemented using hardware methods such as circuits.

[0175] This application also discloses a storage medium, which is a computer-readable storage medium storing a computer program thereon. When the computer program is executed, it can perform the steps of the method shown in the foregoing embodiments. The storage medium may include read-only memory (ROM), random access memory (RAM), a magnetic disk, or an optical disk, etc. The storage medium may also include non-volatile memory or non-transitory memory, etc.

[0176] Please refer to Figure 11 This application also provides a schematic diagram of the hardware structure of a communication device. The device includes a processor 1101, a memory 1102, and a transceiver 1103.

[0177] Processor 1101 can be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits used to control the execution of the program according to the present application. Processor 1101 may also include multiple CPUs, and processor 1101 can be a single-core processor or a multi-core processor. Here, processor can refer to one or more devices, circuits, or processing cores used to process data (e.g., computer program instructions).

[0178] The memory 1102 can be a ROM or other type of static storage device capable of storing static information and instructions, RAM or other type of dynamic storage device capable of storing information and instructions, or it can be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer. This application embodiment does not impose any limitations on this. The memory 1102 can exist independently (in this case, the memory 1102 can be located outside or inside the device) or it can be integrated with the processor 1101. The memory 1102 may contain computer program code. The processor 1101 is used to execute the computer program code stored in the memory 1102 to implement the method provided in this application embodiment.

[0179] The processor 1101, memory 1102, and transceiver 1103 are connected via a bus. The transceiver 1103 is used to communicate with other devices or communication networks. Optionally, the transceiver 1103 may include a transmitter and a receiver. The device in the transceiver 1103 that implements the receiving function can be considered as a receiver, and the receiver is used to perform the receiving steps in the embodiments of this application. The device in the transceiver 1103 that implements the transmitting function can be considered as a transmitter, and the transmitter is used to perform the transmitting steps in the embodiments of this application.

[0180] when Figure 11The schematic diagram shown illustrates the structure of the terminal device involved in the above embodiments. The processor 1101 is used to control and manage the actions of the terminal device. For example, the processor 1101 supports the terminal device in performing actions in other processes described in the embodiments of this application. The processor 1101 can communicate with other network entities through the transceiver 1103, for example, with the aforementioned network device. The memory 1102 is used to store the program code and data of the terminal device. When the processor runs the computer program, it can control the transceiver 1103 to receive one or more of RRC signaling and MAC signaling.

[0181] when Figure 11 The schematic diagram shown illustrates the structure of the network device involved in the above embodiments. The processor 1101 is used to control and manage the actions of the network device. For example, the processor 1101 supports the network device in performing actions performed in other processes described in the embodiments of this application. The processor 1101 can communicate with other network entities through the transceiver 1103, for example, with the aforementioned terminal device. The memory 1102 is used to store the program code and data of the network device. When the processor runs the computer program, it can control the transceiver 1103 to send one or more of RRC signaling and MAC signaling.

[0182] In this application embodiment, a one-way communication link from the access network to the terminal device is defined as a downlink, and the data transmitted on the downlink is called downlink data. The transmission direction of the downlink data is called the downlink direction. On the other hand, a one-way communication link from the terminal device to the access network is defined as an uplink, and the data transmitted on the uplink is called uplink data. The transmission direction of the uplink data is called the uplink direction.

[0183] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article indicates that the preceding and following related objects have an "or" relationship.

[0184] In the embodiments of this application, "multiple" refers to two or more.

[0185] The descriptions of "first," "second," etc., appearing in the embodiments of this application are for illustrative purposes and to distinguish the objects being described. They have no order and do not indicate any special limitation on the number of devices in the embodiments of this application, nor do they constitute any limitation on the embodiments of this application.

[0186] In this application, the term "connection" refers to various connection methods, such as direct connection or indirect connection, to achieve communication between devices. This application does not impose any limitations on this.

[0187] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or 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. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means.

[0188] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply 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 this application.

[0189] In the several embodiments provided in this application, it should be understood that the disclosed methods, apparatuses, and systems can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for example, the division of units is merely a logical functional division, and other division methods may exist in actual implementation; for example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0190] 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.

[0191] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can be physically included separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0192] The integrated unit implemented as a software functional unit described above can be stored in a computer-readable storage medium. This software functional unit, stored in a storage medium, includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute some steps of the methods described in the various embodiments of this application.

[0193] While this application discloses the above information, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of this application; therefore, the scope of protection of this application shall be determined by the scope defined in the claims.

Claims

1. A communication method, characterized in that, Applied to the distribution unit side, the communication method includes: Send Layer 1 measurement parameters, which are used for Layer 1 / Layer 2 triggered mobility LTM handover or Layer 1 measurement reporting.

2. The communication method according to claim 1, characterized in that, The layer 1 measurement parameters include at least one of the following: The switching condition, the first condition, or the first information are used to trigger conditional LTM switching, the first condition is used to trigger early synchronization or timed early TA acquisition, and the first information is used to configure layer 1 measurement reporting.

3. The communication method according to claim 1 or 2, characterized in that, The layer 1 measurement parameters include at least one of the following: The identifier of the measurement event, the threshold of the measurement event, the hysteresis value of the measurement event, the trigger time of the measurement event, and the bias value of the measurement event.

4. The communication method according to claim 2, characterized in that, Also includes: Measurement results from receiver layer 1; In response to the layer 1 measurement result satisfying the first condition, a first command is sent, which is used to trigger the terminal device to perform advance synchronization.

5. The communication method according to claim 1, characterized in that, Also includes: Receive candidate cell information and / or Layer 3 handover conditions, the candidate cell information and / or Layer 3 handover conditions being used to determine the Layer 1 measurement parameters.

6. The communication method according to claim 5, characterized in that, The information of the candidate cell includes the identifier of the candidate cell; the handover conditions of the layer 3 include at least one of the following: the identifier of the handover event, the threshold of the handover event, the hysteresis value of the handover event, the trigger time of the handover event, and the bias value of the handover event.

7. The communication method according to any one of claims 1-6, characterized in that, Also includes: Receive a second message, which instructs adjustment of the layer 1 measurement parameters; A third message is sent, indicating whether to confirm the adjustment of the Layer 1 measurement parameters or to deny the adjustment of the Layer 1 measurement parameters.

8. A communication method, characterized in that, Applied to the central unit side, the communication method includes: Receive Layer 1 measurement parameters, which are used for LTM switching or Layer 1 measurement reporting.

9. The communication method according to claim 8, characterized in that, The layer 1 measurement parameters include at least one of the following: The switching condition, the first condition, or the first information are used to trigger conditional LTM switching, the first condition is used to trigger early synchronization or TA acquisition, and the first information is used to configure layer 1 measurement reporting.

10. The communication method according to claim 8 or 9, characterized in that, The layer 1 measurement parameters include at least one of the following: The identifier of the measurement event, the threshold of the measurement event, the hysteresis value of the measurement event, the trigger time of the measurement event, and the bias value of the measurement event.

11. The communication method according to claim 8, characterized in that, Also includes: Send candidate cell information and / or Layer 3 handover conditions, the candidate cell information and / or Layer 3 handover conditions being used to determine the Layer 1 measurement parameters.

12. The communication method according to any one of claims 8-11, characterized in that, Also includes: Send a second message, which instructs adjustment of the layer 1 measurement parameters; A third message is received, which indicates whether to confirm or deny adjusting the layer 1 measurement parameters.

13. The communication method according to claim 8, characterized in that, Also includes: The layer 1 measurement parameters are sent to the terminal device.

14. A communication method, characterized in that, Applied to the terminal device side, the communication method includes: Receive Layer 1 measurement parameters, which are used for LTM switching or Layer 1 measurement reporting.

15. The communication method according to claim 14, characterized in that, The layer 1 measurement parameters include at least one of the following: The switching condition, the first condition, or the first information are used to trigger LTM switching, the first condition is used to trigger early synchronization or TA acquisition, and the first information is used to configure Layer 1 measurement reporting.

16. The communication method according to claim 15, characterized in that, Also includes: The layer 1 measurement results are sent based on the first information; or... When switching from a source cell to a target cell, the signal quality of the source cell and / or the target cell meets the switching conditions.

17. A communication device, characterized in that, The communication device, applied to the distribution unit side, includes: The communication module is used to send Layer 1 measurement parameters, which are used for LTM switching or Layer 1 measurement reporting.

18. A communication device, characterized in that, The communication device, applied to the central unit side, includes: The communication module is used to receive Layer 1 measurement parameters, which are used for LTM switching or Layer 1 measurement reporting.

19. A communication device, characterized in that, The communication device, applied to the terminal equipment side, includes: The communication module is used to receive Layer 1 measurement parameters, which are used for LTM switching or Layer 1 measurement reporting.

20. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is run by the processor, it performs the steps of the communication method according to any one of claims 1 to 7, or the steps of the communication method according to any one of claims 8 to 13, or the steps of the communication method according to any one of claims 14 to 16.

21. A computer program product, comprising a computer program / instructions, characterized in that, When executed by a processor, the computer program / instruction implements the steps of the communication method according to any one of claims 1 to 7, or performs the steps of the communication method according to any one of claims 8 to 13, or performs the steps of the communication method according to any one of claims 14 to 16.

22. A communication device comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, characterized in that, When the processor runs the computer program, it performs the steps of the communication method according to any one of claims 1 to 7.

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