Wireless communication method and device

Abstract

The present application relates to the field of communication technology, and discloses a wireless communication method and apparatus, wherein the method comprises: receiving measurement configuration information from a serving cell; obtaining the RSRP and SINR of the serving cell according to the measurement configuration information; obtaining the RSRP and SINR of a neighboring cell according to the measurement configuration information; when the RSRP of the serving cell and the RSRP of the neighboring cell do not meet the measurement event reporting conditions from the serving cell, but the SINR of the neighboring cell is better than the SINR of the serving cell, reporting indication information of the measurement event, wherein the indication information of the measurement event is used to indicate that the neighboring cell is better than the serving cell. By adopting the above method, the terminal device can determine whether to report the indication information of the measurement event based on the RSRP and SINR of the serving cell and the neighboring cell, thereby being able to more comprehensively consider the communication quality of the cell, so that the terminal device can switch to a cell with better communication quality in a timely manner.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a wireless communication method and device. Background Art

[0002] With the development of wireless communication and rail transit technologies, high-speed rail and other means of transportation have gradually become people's travel options. Therefore, mobile communication has also become a common communication application scenario. Because the communication coverage of base stations is limited, mobile devices may need to switch cells during movement to move from one cell to another, thereby avoiding significant interruptions in the terminal device's service connections (such as voice calls and network data connections).

[0003] During the cell switching process, the terminal device can measure the serving cell and the neighboring cell according to the measurement configuration information from the serving cell to obtain the signal reception quality indicators of the serving cell and the neighboring cell. For example, the signal reception quality indicators can be reference signal receiving power (RSRP) or reference signal receiving quality (RSRQ) or signal to interference plus noise ratio (SINR); furthermore, the terminal device determines that the reporting conditions of the measurement event (such as the A3 event) are met based on the signal reception quality indicators of the serving cell and the neighboring cell, and triggers the report. Accordingly, the base station corresponding to the serving cell can instruct the terminal device to perform cell switching after receiving the report.

[0004] However, in some possible scenarios (such as high-speed rail scenarios and cell edge interference scenarios), adopting the above cell switching method may cause the cell switching to be untimely, affecting the normal service of the terminal equipment. Summary of the Invention

[0005] The present application provides a wireless communication method and apparatus for solving the technical problem that cell switching is not timely enough, affecting the normal services of terminal equipment.

[0006] In a first aspect, an embodiment of the present application provides a wireless communication method, which can be applied to a terminal device or a chip in a terminal device. Taking the application of this method to a terminal device as an example, the terminal device receives measurement configuration information from a serving cell, the measurement configuration information including measurement indication information of the serving cell, measurement indication information of a neighboring cell, and indication information of a measurement event reporting condition; according to the measurement configuration information, the RSRP of the serving cell and the SINR of the serving cell are obtained; according to the measurement configuration information, the RSRP of the neighboring cell and the SINR of the neighboring cell are obtained; when the RSRP of the serving cell and the RSRP of the neighboring cell do not meet the measurement event reporting condition from the serving cell, but the SINR of the neighboring cell is better than the SINR of the serving cell, the indication information of the measurement event is reported to the serving cell, where the indication information of the measurement event is used to indicate that the neighboring cell is better than the serving cell.

[0007] By adopting the above method, the terminal device can determine whether to report the indication information of the measurement event based on the RSRP and SINR of the serving cell and the neighboring cell, thereby being able to more comprehensively consider the communication quality of the cell, so that the terminal device can switch to a cell with better communication quality in a timely manner, thereby improving the user experience.

[0008] In one possible design, the method further includes: receiving a switching command from the serving cell, the switching command being used to instruct the terminal device to switch to the neighboring cell; and initiating a random access process to the neighboring cell according to the switching command.

[0009] In one possible design, the measurement event is an A3 event.

[0010] In one possible design, the serving cell and the neighbor cell are co-frequency cells.

[0011] In one possible design, the indication information of the measurement event includes the measurement result of the serving cell and the measurement result of the neighbor cell; wherein, the measurement result of the serving cell is determined based on the RSRP of the serving cell; the measurement result of the neighbor cell is determined based on the RSRP of the neighbor cell and a first offset, and the first offset is determined based on the SINR of the neighbor cell and the SINR of the serving cell.

[0012] In one possible design, the indication information of the measurement event includes the measurement result of the serving cell and the measurement result of the neighboring cell; wherein, the measurement result of the serving cell is determined based on the RSRP of the serving cell and a second offset, and the second offset is determined based on the SINR of the neighboring cell and the SINR of the serving cell; the measurement result of the neighboring cell is determined based on the RSRP of the neighboring cell.

[0013] In one possible design, the measurement result of the neighbor cell is better than the measurement result of the serving cell.

[0014] In one possible design, the terminal device is in high-speed rail mode, which is a wireless communication optimization mode pre-set for the terminal device according to the high-speed rail scenario.

[0015] In one possible design, the terminal device is in a cell edge interference mode, and the cell edge interference mode is a wireless communication optimization mode pre-set by the terminal device according to a cell edge interference scenario.

[0016] In a second aspect, an embodiment of the present application provides a wireless communication method, which can be applied to a terminal device or a chip in a terminal device. Taking the application of this method to a terminal device as an example, the terminal device receives reselection configuration information from a resident cell, the reselection configuration information including reselection indication information of the resident cell, and reselection indication information of a neighboring cell, and a reselection condition; according to the reselection configuration information, the RSRP of the resident cell and the SINR of the resident cell are obtained; according to the reselection configuration information, the RSRP of the neighboring cell and the SINR of the neighboring cell are obtained; when the RSRP of the resident cell and the RSRP of the neighboring cell do not meet the reselection condition from the resident cell, but the SINR of the neighboring cell is better than the SINR of the resident cell, reselect to the neighboring cell.

[0017] By adopting the above method, the terminal device can determine whether to trigger cell reselection based on the RSRP (or RSRQ) and SINR of the resident cell and the neighboring cell, thereby being able to more comprehensively consider the communication quality of the cell, so that the terminal device can reselect to a cell with better communication quality in a timely manner, effectively ensuring the access performance of the terminal device.

[0018] In one possible design, the resident cell and the neighbor cell are co-frequency cells.

[0019] In one possible design, the method further includes: after determining that the SINR of the neighboring cell is better than the SINR of the resident cell, determining the signal quality level of the neighboring cell according to the RSRP of the neighboring cell and a third offset, wherein the third offset is determined based on the SINR of the neighboring cell and the SINR of the resident cell; determining the signal quality level of the resident cell according to the RSRP of the resident cell; wherein the signal quality level of the neighboring cell is better than the signal quality level of the resident cell.

[0020] In one possible design, the method further includes: after determining that the SINR of the neighboring cell is better than the SINR of the resident cell, determining the signal quality level of the neighboring cell according to the RSRP of the neighboring cell; determining the signal quality level of the resident cell according to the RSRP of the resident cell and a fourth offset, the fourth offset being determined based on the SINR of the neighboring cell and the SINR of the resident cell; wherein the signal quality level of the neighboring cell is better than the signal quality level of the resident cell.

[0021] In one possible design, the terminal device is in high-speed rail mode, which is a wireless communication optimization mode pre-set for the terminal device according to the high-speed rail scenario.

[0022] In one possible design, the terminal device is in a cell edge interference mode, and the cell edge interference mode is a wireless communication optimization mode pre-set by the terminal device according to a cell edge interference scenario.

[0023] In a third aspect, an embodiment of the present application provides a communication device, which may be a terminal device or a chip disposed within the terminal device. The communication device has the functions of implementing the first or second aspect described above. For example, the communication device includes modules, units, or means corresponding to executing the steps involved in the first or second aspect described above. The functions, units, or means may be implemented through software or hardware, or may be implemented through hardware executing the corresponding software implementation.

[0024] In one possible design, the communication device includes a processing unit and a communication unit. The communication unit can be used to send and receive signals to enable communication between the communication device and other devices, for example, the communication unit is used to receive configuration information from a terminal device; and the processing unit can be used to perform certain internal operations of the communication device. The functions performed by the processing unit and the communication unit can correspond to the operations described in the first or second aspect above.

[0025] In one possible design, the communication device includes a processor and may also include a transceiver, the transceiver being used to transmit and receive signals, and the processor executing program instructions to perform the method in any possible design or implementation of the first or second aspect above. The communication device may also include one or more memories, the memories being used to couple with the processor, and the memories being used to store the necessary computer programs or instructions for implementing the functions involved in the first or second aspect above. The processor may execute the computer programs or instructions stored in the memories, and when the computer programs or instructions are executed, the communication device implements the method in any possible design or implementation of the first or second aspect above.

[0026] In one possible design, the communication device includes a processor, which can be coupled to a memory. The memory can store the necessary computer programs or instructions for implementing the functions of the first or second aspect. The processor can execute the computer programs or instructions stored in the memory. When the computer programs or instructions are executed, the communication device implements the method of any possible design or implementation of the first or second aspect.

[0027] In one possible design, the communication device includes a processor and an interface circuit, wherein the processor is used to communicate with other devices through the interface circuit and execute the method in any possible design or implementation of the first aspect or the second aspect above.

[0028] It can be understood that in the third aspect above, the processor can be implemented by hardware or by software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor can be a general-purpose processor, which is implemented by reading the software code stored in the memory. In addition, the above processors can be one or more, and the memories can be one or more. The memory can be integrated with the processor, or the memory and the processor can be set separately. In the specific implementation process, the memory can be integrated with the processor on the same chip, or can be set on different chips respectively. The embodiment of the present application does not limit the type of memory and the setting method of the memory and the processor.

[0029] In a fourth aspect, an embodiment of the present application provides a communication system, which includes a terminal device, and the terminal device is used to execute the wireless communication method described in the first aspect above; optionally, the communication system may also include an access network device.

[0030] In a fifth aspect, the present application provides a computer-readable storage medium, in which computer-readable instructions are stored. When a computer reads and executes the computer-readable instructions, the computer executes the method in any possible design of the first aspect or the second aspect mentioned above.

[0031] In a sixth aspect, the present application provides a computer program product, which, when read and executed by a computer, enables the computer to execute the method in any possible design of the first aspect or the second aspect above.

[0032] In a seventh aspect, the present application provides a chip, comprising a processor, wherein the processor is coupled to a memory and is configured to read and execute a software program stored in the memory to implement a method in any possible design of the first or second aspect above.

[0033] These and other aspects of the present application will become more readily apparent from the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of a network architecture applicable to an embodiment of the present application;

[0035] Figure 2 This is another network architecture diagram applicable to the embodiments of the present application;

[0036] Figure 3 This is another network architecture diagram applicable to the embodiments of the present application;

[0037] Figure 4 A flowchart corresponding to the wireless communication method provided in Example 1 of the present application;

[0038] Figure 5 A schematic diagram of the flow chart corresponding to the wireless communication method provided in Example 2 of the present application;

[0039] Figure 6 A possible exemplary block diagram of the apparatus involved in the embodiments of the present application;

[0040] Figure 7 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0042] First, some of the terms used in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

[0043] (1) Terminal device: It can be a wireless terminal device that can receive access network device scheduling and instruction information. The wireless terminal device can be a device that provides voice and / or data connectivity to users, or a handheld device with wireless connection function, or other processing equipment connected to a wireless modem. The terminal device can communicate with one or more core networks or the Internet via a radio access network (RAN). The terminal device can be a mobile terminal device, such as a mobile phone (or "cellular" phone, mobile phone), a computer and a data card. For example, it can be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges voice and / or data with the radio access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), tablet computers (Pads), computers with wireless transceiver functions, and other devices. A wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station (MS), a remote station (remotestation), an access point (AP), a remote terminal, an access terminal, a user terminal, a user agent, a subscriber station (SS), a customer premises equipment (CPE), a terminal, a user equipment (UE), a mobile terminal (MT), etc. A terminal device may also be a wearable device or a next-generation communication system, for example, a terminal device in a 5G communication system or a terminal device in a future-evolved public land mobile network (PLMN).

[0044] (2) Access network equipment: It can be a device in a wireless network. For example, the access network equipment can be a radio access network (RAN) node (or device) that connects a terminal device to a wireless network, which can also be called a base station. Currently, some examples of RAN equipment include: a new generation Node B (gNodeB) in a 5G communication system, a transmission reception point (TRP), an evolved Node B (eNB), a radio network controller (RNC), a Node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a base band unit (BBU), or a wireless fidelity (Wi-Fi) access point (AP). In addition, in a network structure, the access network device may include a centralized unit (CU) node, a distributed unit (DU) node, or a RAN device including a CU node and a DU node. In addition, in other possible cases, the access network device may be other devices that provide wireless communication functions for terminal devices. The embodiments of the present application do not limit the specific technology and specific device form adopted by the access network device. For the convenience of description, in the embodiments of the present application, the device that provides wireless communication functions for the terminal device is referred to as an access network device.

[0045] (3) The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "At least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, "at least one of A, B and C" includes A, B, C, AB, AC, BC or ABC. In addition, unless otherwise specified, the ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, timing, priority or importance of multiple objects.

[0046] Figure 1 This is a schematic diagram of a network architecture applicable to the embodiment of this application. Figure 1 As shown, a terminal device can access a wireless network to obtain services from an external network (e.g., the Internet) through the wireless network, or communicate with other devices through the wireless network, such as other terminal devices. The wireless network includes a RAN and a core network (CN). The RAN is used to connect a terminal device (e.g., terminal device 130) to the wireless network, and the CN is used to manage the terminal device and provide a gateway for communication with the external network.

[0047] The RAN may include one or more RAN devices, such as RAN device 1101 and RAN device 1102.

[0048] The CN may include one or more CN devices, such as CN device 120. Figure 1 When the network architecture shown is applicable to a 5G communication system, the CN device 120 may include an access and mobility management function (AMF) entity, a session management function (SMF) entity, a user plane function (UPF) entity, and the like.

[0049] For the communication between the terminal device and the RAN device, according to the different transmission directions, the transmission link from the terminal device to the RAN device can be recorded as an uplink (uplink, UL), and the transmission link from the RAN device to the terminal device can be recorded as a downlink (downlink, DL). Similarly, data transmission in the uplink can be simply recorded as uplink data transmission or uplink transmission, and data transmission in the downlink can be simply recorded as downlink data transmission or downlink transmission. In this network architecture, the RAN device can provide communication coverage for a specific geographical area through integrated or external antenna equipment. One or more terminal devices within the communication coverage of the RAN device can access the RAN device. A RAN device can manage one or more cells, and each cell has an identification (identification), which is also called a cell identity (cell ID). From the perspective of wireless resources, a cell is a combination of downlink wireless resources and uplink wireless resources (optional) paired with it. When the terminal device is in a connected state, switching the RRC connection from the RAN device 1101 to the RAN device 1102 is cell switching; when the terminal device is in an idle state, applying from the resident RAN device 1101 to the resident RAN device 1102 is cell reselection.

[0050] Terminal devices and RAN devices should be aware of the predefined configurations of the network architecture, including the radio access technology (RAT) supported by the system and the wireless resource configuration specified by the system, such as the basic configuration of the radio frequency band and carrier. A carrier is a frequency range that complies with the system regulations. This frequency range can be determined by the center frequency of the carrier (also called the carrier frequency) and the bandwidth of the carrier. These system-predefined configurations can be part of the standard protocol of the wireless communication system, or determined through interaction between the terminal device and the RAN device. The content of the relevant standard protocols may be pre-stored in the memory of the terminal device and the RAN device, or embodied in the hardware circuit or software code of the terminal device and the RAN device.

[0051] It should be understood that Figure 1 The number of devices in the communication system shown is for illustration only, and the embodiments of the present application are not limited thereto. In actual applications, the communication system may further include more terminal devices, more RAN devices, and other devices.

[0052] Figure 2 This is another network architecture diagram applicable to the embodiment of this application. Figure 2As shown, the network architecture includes CN equipment, RAN equipment, and terminal equipment. The RAN equipment includes a baseband device and a radio frequency device, wherein the baseband device can be implemented by one node or multiple nodes, and the radio frequency device can be implemented independently from the baseband device or integrated into the baseband device, or some functions can be integrated independently and some functions can be integrated into the baseband device. For example, in an LTE communication system, the RAN equipment includes a baseband device and a radio frequency device, wherein the radio frequency device can be arranged remotely from the baseband device, for example, a remote radio unit (RRU) is a remote radio unit arranged relative to the BBU.

[0053] The communication between RAN equipment and terminal equipment follows a certain protocol layer structure. For example, the control plane protocol layer structure may include the functions of the radio resource control (RRC) layer, packet data convergence protocol (PDCP) layer, radio link control (RLC) layer, media access control (MAC) layer, and physical layer. The user plane protocol layer structure may include the functions of the PDCP layer, RLC layer, MAC layer, and physical layer. In one possible implementation, the service data adaptation protocol (SDAP) layer may also be included above the PDCP layer.

[0054] The RAN device can implement the functions of the protocol layers such as RRC, PDCP, RLC and MAC by one node, or can implement the functions of these protocol layers by multiple nodes. For example, in an evolutionary structure, the RAN device may include a CU) and a DU, and multiple DUs may be centrally controlled by one CU. Figure 2 As shown, CU and DU can be divided according to the protocol layers of the wireless network, for example, the functions of the PDCP layer and above protocol layers are set in CU, and the functions of the protocol layers below PDCP, such as the RLC layer and MAC layer, are set in DU.

[0055] This protocol layer division is merely an example. Division can also be performed at other protocol layers, such as the RLC layer, where functions at and above the RLC layer are located in the CU, while functions at layers below the RLC layer are located in the DU. Alternatively, division can be performed within a specific protocol layer, such as where some functions at the RLC layer and functions at layers above the RLC layer are located in the CU, while the remaining functions at the RLC layer and functions at layers below the RLC layer are located in the DU. Furthermore, division can be performed in other ways, such as by latency, where functions that require processing time to meet latency requirements are located in the DU, while functions that do not require latency requirements are located in the CU.

[0056] In addition, the radio frequency device can be independently integrated and not placed in the DU, or it can be integrated in the DU, or part of it can be remotely located and part of it can be integrated in the DU. There is no limitation here.

[0057] Figure 3 This is another network architecture diagram applicable to the embodiment of this application. Figure 2 The network architecture shown, Figure 3 The control plane (CP) and user plane (UP) of the CU can also be separated and implemented into different entities, namely the control plane (CP) CU entity (i.e., CU-CP entity) and the user plane (UP) CU entity (i.e., CU-UP entity).

[0058] In the above network architecture, the signaling generated by the CU can be sent to the terminal device through the DU, or the signaling generated by the terminal device can be sent to the CU through the DU. The DU can directly encapsulate the signaling through the protocol layer and transparently transmit it to the terminal device or CU without parsing it. In the following embodiments, if the transmission of such signaling between the DU and the terminal device is involved, then the sending or receiving of the signaling by the DU includes this scenario. For example, the signaling of the RRC or PDCP layer will eventually be processed as the signaling of the PHY layer and sent to the terminal device, or converted from the received signaling of the PHY layer. Under this architecture, the signaling of the RRC or PDCP layer can also be considered to be sent by the DU, or sent by the DU and the RF loader.

[0059] above Figure 1 、 Figure 2 or Figure 3The network architecture shown can be applicable to various RAT communication systems, for example, it can be a 4G (or long term evolution (LTE)) communication system, it can also be a 5G (or new radio (NR)) communication system, it can also be a transition system between the LTE communication system and the 5G communication system, and the transition system can also be called a 4.5G communication system, and of course it can also be a future communication system. The network architecture and business scenarios described in the embodiments of the present application are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. It is known to those skilled in the art that with the evolution of the communication network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems. The devices in the following embodiments of the present application can be located in terminal equipment or access network equipment according to the functions they implement.

[0060] The following is an explanation of the relevant technical features involved in cell switching. It should be noted that these explanations are intended to make the embodiments of this application easier to understand and should not be regarded as limiting the scope of protection claimed by this application.

[0061] When the terminal device is in the RRC connected state (RRC_CONNECTED), due to the mobility of the terminal device or the different fading of the cell edge channel, the reception quality of the signals from different access network devices to the terminal device may be different, which may cause the terminal device to switch between different cells. For example, see Figure 1 In the network architecture shown, after the terminal device 130 establishes an RRC connection with the access network device 1101, the terminal device 130 moves, for example, the terminal device 130 moves from the communication coverage of the access network device 1101 to the communication coverage of the access network device 1102. In this case, the reception quality of the signal received by the terminal device 130 from the access network device 1102 may be better than the reception quality of the signal received by the terminal device from the access network device 1101, which may cause the terminal device 130 to switch from the cell of the access network device 1101 (which is the serving cell of the terminal device) to the cell of the access network device 1102. The access network device (i.e., the access network device 1101) or the cell to which the terminal device accesses before the handover can be referred to as the source access network device or the source cell, and the access network device (i.e., the access network device 1102) or the cell to which the terminal device accesses after the handover can be referred to as the target access network device or the target cell.

[0062] Specifically, the terminal device can measure the signal reception quality of the serving cell (for example, the primary cell (PCell) or primary secondary cell (PSCell) of the terminal device) and the neighboring cell to obtain the signal reception quality indicators of the serving cell and the neighboring cell. When the reporting conditions of Event A3 are met, the terminal device reports the measurement report to the source access network device. Accordingly, after receiving the measurement report, the source access network device can instruct the terminal device to switch from the source cell to the target cell. The signal reception quality indicator of the serving cell or the neighboring cell may be RSRP, RSRQ, or SINR.

[0063] The definition of event A3 is: the neighbor cell is better than the serving cell by a certain offset (neighbor becomes offset better than PCell / PSCell). The judgment formula for event A3 is:

[0064] Mn+Ofn+Ocn-Hys>Mp+Ofp+Ocp+Off……Formula 1

[0065] Mn+Ofn+Ocn-Hys<Mp+Ofp+Ocp+Off……Formula 2

[0066] Formula 1 above is the entry condition for the A3 event, that is, when Formula 1 is satisfied, the A3 event can be entered; Formula 2 above is the exit condition for the A3 event, that is, when Formula 2 is satisfied, the A3 event can be exited. In one example, when Formula 1 is continuously satisfied for a period of time (i.e., the trigger time (TimeToTrigger)), it means that the reporting condition for the A3 event is met, and the terminal device can report the measurement report to the source access network device.

[0067] The following are the parameters in formula 1 and formula 2:

[0068] Mn: Signal reception quality indicator of the neighboring cell (such as RSRP).

[0069] Ofn: The specific frequency offset of the neighboring cell. The default value is 0. This parameter is used to control the priority of the target cell and is not considered when switching between cells on the same frequency.

[0070] Ocn: Specific cell offset of neighboring cells.

[0071] Hys: A3 event hysteresis. By adjusting the hysteresis value, you can adjust the difficulty of reporting measurement events and reduce the frequent triggering of measurement events due to wireless signal fluctuations.

[0072] Mp: signal reception quality indicator of the serving cell (such as RSRP).

[0073] Ofp: The specific frequency offset of the serving cell, which defaults to 0 and is not considered when switching between cells on the same frequency.

[0074] Ocp: Specific cell offset of the serving cell, usually 0.

[0075] Off: A3 event offset. This value is used to control the difficulty of cell switching.

[0076] It should be noted that when the signal reception quality indicator is RSRP, the unit of Mn and Mp can be expressed in decibel milliwatts (dBm); when the signal reception quality indicator is RSRQ or SINR, the unit of Mn and Mp can be expressed in decibels (dB). The units of Ofn, Ocn, Hys, Ofp, Ocp, and Of can also be expressed in decibels.

[0077] In addition, each cell may correspond to a frequency point (or a frequency range, i.e., a carrier), which may be referred to as a center frequency point. For example, if the center frequency point is 2100 MHz and the bandwidth is 20 MHz, the frequency range corresponding to the cell is 2090 to 2110 MHz. Intra-frequency cells may refer to cells with the same center frequency point, and hetero-frequency cells may refer to cells with different center frequencies. The cell switching described above can be divided into intra-frequency cell switching and hetero-frequency cell switching. In the embodiments of the present application, intra-frequency cell switching will be described as an example, and hetero-frequency cell switching can be implemented with reference to this.

[0078] According to the above description of cell switching, the terminal device determines whether to trigger cell switching based on the RSRP, RSRQ or SINR of the serving cell and the neighboring cell. Under normal circumstances, the values ​​of the three indicators RSRP, RSRQ and SINR are consistent or equivalent. For example, when the RSRP of cell A is higher than the RSRP of cell B, the RSRQ of cell A will also be higher than the RSRQ of cell B, and the SINR of cell A will also be higher than the SINR of cell B. Therefore, terminal device manufacturers usually set the terminal device to determine whether to trigger cell switching based on one of these three indicators. Considering that measuring RSRP is more convenient, in the specific implementation of the existing technology, whether to trigger cell switching is usually determined based on the RSRP of the serving cell and the neighboring cell.

[0079] However, since RSRP reflects the downlink quality in the current environment of the terminal device, and cannot directly reflect the throughput or data transmission status of the terminal device, in some special scenarios, judging whether to trigger cell switching based on the RSRP of the serving cell and the neighboring cell may result in untimely cell switching and affect the normal service of the terminal device.

[0080] For example, in a high-speed rail scenario, the terminal device is in a fast-moving state. In this case, the three indicators of RSRP, RSRQ, and SINR may no longer be consistent. For example, when the terminal device moves from cell A to cell B, the RSRP of cell A measured by the terminal device is higher than the RSRP of cell B, but the SINR of cell A may be much lower than the SINR of cell B (for example, due to the rapid movement of the terminal device, cell A may be subject to strong interference, resulting in a lower SINR of cell A). In other words, the communication quality of cell B is better than that of cell A. At this time, using the existing cell switching method, since the A3 event is not met, the terminal device will continue to stay in cell A and will not switch to cell B; when the RSRP of cell A measured by the subsequent terminal device is lower than the RSRP of cell B, the terminal device may switch from cell A to cell B, but at this time the SINR of cell A is generally very poor, which will cause the terminal device throughput to drop or the connection with the access network device to be interrupted. From this, it can be seen that judging whether to enter the A3 event based on the RSRP of the serving cell and the neighboring cell causes the terminal device to fail to switch from cell A to cell B with better communication quality in a timely manner.

[0081] Similar to the high-speed rail scenario, in the cell edge interference scenario or some other possible scenarios, there will also be the problem of untimely cell switching.

[0082] Based on this, an embodiment of the present application provides a wireless communication method for a terminal device, which is used to solve the technical problem that the cell switching is not timely enough and affects the normal business of the terminal device. In an embodiment of the present application, the terminal device can determine whether to trigger the cell switching based on the RSRP and SINR of the serving cell and the RSRP and SINR of the neighboring cell, or the terminal device can also determine whether to trigger the cell switching based on the RSRQ and SINR of the serving cell and the RSRQ and SINR of the neighboring cell; that is, the terminal device can determine whether to trigger the cell switching based on a combination of two of these three indicators. Compared with the existing technology of determining whether to trigger the cell switching based on one of the indicators, this method can more comprehensively consider the communication quality of the cell, thereby enabling the terminal device to switch to a cell with better communication quality in a timely manner, thereby improving the user experience.

[0083] The following describes the process of the wireless communication method provided by the embodiment of the present application in conjunction with Example 1. In Example 1, the terminal device will be described as an example of determining whether to trigger cell handover based on the RSRP and SINR of the serving cell and neighboring cells. It is understandable that the RSRP involved in Example 1 can also replace RSRQ.

[0084] Example 1

[0085] Figure 4 This is a flow chart corresponding to the wireless communication method provided in Example 1 of the present application, such as Figure 4 As shown, the method includes:

[0086] S401: The first access network device sends measurement configuration information to the terminal device in the serving cell of the terminal device.

[0087] Here, the first access network device may send the measurement configuration (MeasConfig) information through an RRC connection reconfiguration (RRC connection reconfiguration) message or an RRC connection resume (RRC connection resume) message.

[0088] Exemplarily, the measurement configuration information may include measurement indication information of the serving cell, measurement indication information of the neighboring cell, and indication information of the measurement event reporting condition. The measurement indication information of the serving cell may include the center frequency of the serving cell (for example, the serving cell is cell 0), and the measurement indication information of the neighboring cell may include the center frequency of the neighboring cell (for example, the neighboring cells include cell 1, cell 2, and cell 3). Taking measurement event A3 as an example, the measurement event reporting condition may be: if the above formula 1 is continuously satisfied within the trigger time, the indication information of the measurement event reporting condition may include the values ​​of the parameters (such as Ofn, Ocn, Hys, Ofp, Ocp, Off) required for calculation of the above formula 1 or formula 2.

[0089] As a possible implementation, the measurement configuration information may include the following information elements (IE): multiple measurement objects, multiple measurement reporting configurations, and multiple measurement identities. The measurement indication information of the serving cell, the measurement indication information of the neighboring cell, and the indication information of the measurement event reporting conditions may be carried in these information elements. For example, a measurement object (for example, measurement object 1) may include some or all of the following contents: the center frequency of the serving cell, the center frequency of the neighboring cell, and the values ​​of parameters such as Ofn, Ocn, Ofp, and Ocp. It should be noted that the values ​​of some parameters such as Ofn, Ocn, Ofp, and Ocp may be default values. For example, when the value of Ofp is not included in measurement object 1, Ofp may use the default value. A measurement reporting configuration (for example, measurement reporting configuration 1) may include some or all of the following contents: the values ​​of parameters such as Hys and Off, and the type of indicator to be measured (for example, RSRP). A measurement identifier is used to associate a measurement report configuration with a measurement object, that is, a measurement identifier is used to mark a measurement object + a measurement report configuration, for example, measurement identifier 1 is associated with measurement object 1 and measurement report configuration 1.

[0090] Accordingly, in S402, the terminal device may receive measurement configuration information from the serving cell.

[0091] S403, the terminal device determines whether it is in the target mode. If it is in the target mode, S404 to S408 can be executed. If it is not in the target mode, the specific execution process can refer to the existing technology.

[0092] Here, the target mode can be a high-speed rail mode, a cell edge interference mode, or other possible modes, without specific limitation. Among them, the high-speed rail mode is a wireless communication optimization mode pre-set by the terminal device according to the high-speed rail scenario, and the cell edge interference mode is a wireless communication optimization mode pre-set by the terminal device according to the cell edge interference scenario.

[0093] Taking the target mode as the high-speed rail mode as an example, there are many ways for the terminal device to determine whether it is in the high-speed rail mode. For example, the terminal device can determine whether it is in the high-speed rail mode by receiving the configuration information of the service cell, or the terminal device can also determine whether it is in the high-speed rail mode through the built-in sensors of the terminal device (such as vibration sensors, acceleration sensors), or the terminal device can also determine whether it is in the high-speed rail mode through self-sensing calculations. For example, the terminal device can determine the current moving speed, and then determine whether it is in the high-speed rail mode based on the moving speed. For example, when the moving speed is greater than a preset threshold, it can be determined that it is in the high-speed rail mode, and when the moving speed is less than the preset threshold, it can be determined that it is not in the high-speed rail mode. Among them, there are many ways for the terminal device to determine the moving speed, such as determining the moving speed through the global positioning system (GPS) or other location sensing technologies.

[0094] It should be noted that the above S403 is an optional step, that is, the terminal device can perform cell switching by executing S404 to S408 when it is determined to be in the target mode; or, the terminal device can also directly execute S404 to S408 to perform cell switching without considering the current mode.

[0095] S404: The terminal device obtains the RSRP and SINR of the serving cell according to the measurement configuration information.

[0096] Exemplarily, the terminal device can receive a downlink signal from the serving cell according to the center frequency of the serving cell, and then measure the RSRP and SINR of the serving cell. The downlink signal here can be a synchronization signal and a physical broadcast channel block (PBCH block) (referred to as SSB), or a cell reference signal (CRS), or a channel state information reference signal (CSI-RS), or other possible pilot signals, without specific limitation.

[0097] S405: The terminal device obtains the RSRP and SINR of the neighboring cell according to the measurement configuration information.

[0098] For example, the terminal device can receive a downlink signal from a neighboring cell based on the center frequency of the neighboring cell, and then measure the RSRP and SINR of the neighboring cell. The downlink signal here can be an SSB or a CRS or other possible pilot signal, which is not specifically limited. In addition, the terminal device can also obtain the identifier of the neighboring cell, such as the physical cell identity (PCI), by parsing the SSB of the neighboring cell.

[0099] S406: The terminal device determines whether to report measurement event indication information to the serving cell based on the RSRP and SINR of the serving cell and the RSRP and SINR of the neighboring cell. The measurement event indication information is used to indicate that the neighboring cell is superior to the serving cell. Taking the measurement event A3 as an example, the measurement event indication information may include a measurement identifier (such as measurement identifier 1 described above), the measurement result of the serving cell, the identifier of the neighboring cell, and the measurement result of the neighboring cell; wherein the measurement result of the neighboring cell is superior to the measurement result of the serving cell.

[0100] Exemplarily, the terminal device can report indication information of the measurement event to the serving cell based on the RSRP and SINR of the serving cell and the RSRP and SINR of the neighboring cell, when the RSRP of the serving cell and the RSRP of the neighboring cell do not meet the measurement event reporting conditions from the serving cell, but the SINR of the neighboring cell is better than the SINR of the serving cell.

[0101] For example, the values ​​of the various parameters of the A3 event configured by the first access network device for the terminal device are: Hys is 0dB, Ofn and Ofp are 0dB, Ocn and Ocp are 0dB, and Off is 2dB. In this case, Mn+Ofn+Ocn-Hys>Mp+Ofp+Ocp+Off can be expressed as Mn>Mp+2dB. In other words, if the RSRP of the neighboring cell is 2dB greater than the RSRP of the serving cell, the A3 event can be entered and the first timer can be triggered (the duration of the first timer is equal to the triggering time). When the first timer times out, it means that the reporting conditions of the A3 event are met; otherwise, the reporting conditions of the A3 event are not met. Assume that the RSRP of the neighboring cell obtained by the terminal device is -79dBm and the SINR is 15dB, and the RSRP of the serving cell is -80dBm and the SINR is -1dB. In this case, Formula 1 is not satisfied, that is, the reporting conditions for the A3 event are not met; but since the SINR of the neighboring cell is better than the SINR of the serving cell, the terminal device can report the indication information of the A3 event to the serving cell.

[0102] The following describes some possible implementations of the terminal device reporting the indication information of the A3 event to the serving cell in combination with implementation methods 1 to 3.

[0103] Implementation 1

[0104] In implementation manner 1, the above S406 may include:

[0105] a1. The terminal device determines whether the SINR of the serving cell and the SINR of the neighboring cell meet the first preset condition based on the SINR of the serving cell and the SINR of the neighboring cell. If the first preset condition is met, a2 can be executed.

[0106] The first precondition is: M SINR p<Threshold, and M SINR n>M SINR p+Offset1

[0107] Among them, M SINR p is the SINR of the serving cell, M SINR n is the SINR of the neighboring cell, Offset1 is the offset value, and Threshold is the threshold value.

[0108] It should be noted that the values ​​of Threshold and Offset1 may be pre-set for the terminal device or pre-defined by the protocol, and are not specifically limited. For example, the value of Threshold may be 30 dB, and the value of Offset1 may be 3 dB.

[0109] a2. The terminal device determines whether the RSRP of the serving cell and the RSRP of the neighboring cell meet the second preset condition based on the RSRP of the serving cell and the RSRP of the neighboring cell. If the second preset condition is met, a3 can be executed.

[0110] The second preset condition is: Mn+Ofn+Ocn-Hys+Off bySINR-1 >Mp+Ofp+Ocp+Off

[0111] Among them, Off bySINR-1 is the first offset.

[0112] It should be noted that the first offset can be understood as an offset caused by the SINR of the neighboring cell being better than the SINR of the serving cell, or in other words, the first offset is determined based on the SINR of the neighboring cell and the SINR of the serving cell.

[0113] As a possible implementation, Off bySINR-1The value of can be pre-set for the terminal device, or can be pre-defined by the protocol, and there is no specific limitation. bySINR-1 The value of can be 2dB. As another possible implementation, Off bySINR-1 The value of can also be adaptively adjusted by the terminal device according to a preset rule. For example, the preset rule can be that the greater the difference between the SINR of the neighboring cell and the SINR of the serving cell, the greater the Off bySINR-1 The larger the value, the greater the value. The specific implementation is not limited.

[0114] a3. The terminal device starts the first timer.

[0115] If the terminal device determines that the above-mentioned first preset condition and second preset condition are continuously met within the triggering time after the first timer is started, then after the first timer expires, the indication information of the measurement event can be reported to the serving cell.

[0116] In this implementation, the measurement result of the serving cell included in the indication information of the measurement event may be obtained based on the RSRP of the serving cell, such as the measurement result of the serving cell is Mp+Ofp+Ocp+Off; the measurement result of the neighboring cell may be obtained based on the RSRP of the neighboring cell and the first offset, such as the measurement result of the neighboring cell is Mn+Ofn+Ocn-Hys+Off bySINR-1 That is to say, the measurement result of the serving cell reported by the terminal device can be understood as the real measurement result of the serving cell, and the measurement result of the neighboring cell reported by the terminal device can be understood as the pseudo-measurement result of the neighboring cell (that is, the terminal device obtains the real measurement result of the neighboring cell after adjusting it). It should be understood that the real measurement result and the pseudo-measurement result are described from the perspective of the terminal device, and the network side (that is, the first access network device) may not be aware of this.

[0117] Implementation 2

[0118] In implementation manner 2, the above S406 may include:

[0119] b1: The terminal device determines whether the SINR of the serving cell and the SINR of the neighboring cell meet a first preset condition based on the SINR of the serving cell and the SINR of the neighboring cell. If the first preset condition is met, b2 may be executed. For the first preset condition, see the above implementation method 1.

[0120] b2. The terminal device determines whether the RSRP of the serving cell and the RSRP of the neighboring cell meet a third preset condition based on the RSRP of the serving cell and the RSRP of the neighboring cell. If the third preset condition is met, b3 can be executed.

[0121] The third preset condition is: Mn+Ofn+Ocn-Hys>Mp+Ofp+Ocp+Off-Off bySINR-2

[0122] Among them, Off bySINR-2 is the second offset.

[0123] It should be noted that the second offset can be understood as an offset caused by the SINR of the neighboring cell being better than the SINR of the serving cell, or in other words, the second offset is determined based on the SINR of the neighboring cell and the SINR of the serving cell.

[0124] As a possible implementation, Off bySINR-2 The value of can be pre-set for the terminal device, or can be pre-defined by the protocol, and there is no specific limitation. bySINR-2 The value of can be 2dB. As another possible implementation, Off bySINR-2 The value of can also be adaptively adjusted by the terminal device according to preset rules, and the specific implementation is not limited.

[0125] In one example, the first offset and the second offset may have the same value.

[0126] b3, the terminal device starts the first timer.

[0127] If the terminal device determines that the above-mentioned first preset condition and third preset condition are continuously met within the triggering time after the first timer is started, it reports the indication information of the measurement event to the serving cell.

[0128] In this implementation, the measurement result of the serving cell included in the indication information of the measurement event is obtained based on the RSRP of the serving cell and the second offset. For example, the measurement result of the serving cell is Mp+Ofp+Ocp+Off-Off bySINR-2 The neighbor cell measurement result may be obtained based on the neighbor cell's RSRP and the first offset. For example, the neighbor cell measurement result may be Mn+Ofn+Ocn-Hys. In other words, the neighbor cell measurement result reported by the terminal device may be understood as the true measurement result of the neighbor cell, while the serving cell measurement result reported by the terminal device may be understood as the pseudo-measurement result of the serving cell (i.e., obtained by the terminal device by adjusting the true measurement result of the serving cell).

[0129] Implementation 3

[0130] In implementation manner 3, the above S406 may include:

[0131] c1: The terminal device determines whether the SINR of the serving cell and the SINR of the neighboring cell meet a first preset condition based on the SINR of the serving cell and the SINR of the neighboring cell. If the first preset condition is met, c2 may be executed. For the first preset condition, see the above implementation method 1.

[0132] c2. The terminal device determines whether the RSRP of the serving cell and the RSRP of the neighboring cell meet a fourth preset condition based on the RSRP of the serving cell and the RSRP of the neighboring cell. If the fourth preset condition is met, c3 can be executed.

[0133] The fourth precondition is:

[0134] Mn+Ofn+Ocn-Hys+Off bySINR-n >Mp+Ofp+Ocp+Off+Off bySINR-p

[0135] Among them, Off bySINR-n Offset corresponding to the neighboring cell, Off bySINR-p is the offset corresponding to the serving cell.

[0136] It should be noted that the offset corresponding to the neighbor cell and the offset corresponding to the serving cell can both be understood as offsets caused by the fact that the SINR of the neighbor cell is better than the SINR of the serving cell.

[0137] As a possible implementation, Off bySINR-n 、Off bySINR-p The value of can be pre-set for the terminal device, or can be pre-defined by the protocol, and there is no specific limitation. bySINR-n Can be greater than Off bySINR-p , such as Off bySINR-n The value can be 4dB, Off bySINR-p The value can be 2dB; for example, Off bySINR-n The value can be 2dB, Off bySINR-p The value can be -1dB.

[0138] c3, the terminal device starts the first timer.

[0139] If the terminal device determines that the above-mentioned first preset condition and fourth preset condition are continuously met within the triggering time after the first timer is started, then after the first timer expires, the indication information of the measurement event can be reported to the serving cell.

[0140] In this implementation, the measurement result of the serving cell included in the indication information of the measurement event may be obtained based on the RSRP of the serving cell and the offset corresponding to the serving cell, for example, the measurement result of the serving cell is Mp+Ofp+Ocp+Off+Off bySINR-p The measurement result of the neighboring cell can be obtained based on the RSRP of the neighboring cell and the offset corresponding to the neighboring cell. For example, the measurement result of the neighboring cell is Mn+Ofn+Ocn-Hys+Off bySINR-n That is to say, the measurement result of the serving cell reported by the terminal device can be understood as a pseudo-measurement result of the serving cell (that is, the terminal device obtains the result after adjusting the actual measurement result of the serving cell), and the measurement result of the neighboring cell reported by the terminal device can be understood as a pseudo-measurement result of the neighboring cell (that is, the terminal device obtains the result after adjusting the actual measurement result of the neighboring cell).

[0141] As a possible implementation, in the above S404 and S405, the physical layer of the terminal device can perform the measurement of the RSRP and SINR of the serving cell and the neighboring cell, and after completing the filtering with the historical values, report the RSRP and SINR of the serving cell and the neighboring cell to the RRC layer, so that the RRC layer can execute S406 based on the RSRP and SINR of the serving cell and the neighboring cell.

[0142] Optionally, the wireless communication method may further include:

[0143] S407, the first access network device sends a handover command to the terminal device, where the handover command is used to instruct the terminal device to handover to a neighboring cell (ie, a target cell).

[0144] Exemplarily, after the first access network device receives the indication information of the measurement event reported by the terminal device, it can send a handover request message to the second access network device corresponding to the target cell; accordingly, after the second access network device receives the handover request message, it can perform a handover admission judgment. If the terminal device is allowed to switch to the target cell, dedicated admission resources are allocated to the terminal device, and a handover acknowledgment (handover request ACK) message is sent to the terminal device. The handover acknowledgment message carries the information required for the terminal device to access the target cell. For example, the information required for the terminal device to access the target cell includes the wireless resource configuration information required for the establishment of the air interface signaling plane and the user plane bearer. Furthermore, after the first access network device receives the handover acknowledgment message, it sends a handover command to the terminal device. The handover command carries the information required for the terminal device to switch to the target cell. It should be noted that the first access network device and the second access network device can be different access network devices, or they can be the same access network device; when the first access network device and the second access network device are the same access network device, the above-mentioned interaction process between the first access network device and the second access network device may no longer be performed.

[0145] Among them, there may be multiple ways for the first access network device to send a switching command to the terminal device, for example, the first access network device sends a switching command to the terminal device through an RRC connection reconfiguration message.

[0146] S408, the terminal device receives a switching command from the first access network device, and initiates a random access process to the target cell according to the switching command to switch to the target cell.

[0147] By adopting the above method, the terminal device can determine whether to trigger cell switching based on the RSRP (or RSRQ) and SINR of the serving cell and the neighboring cell, thereby being able to more comprehensively consider the communication quality of the cell, so that the terminal device can switch to a cell with better communication quality in a timely manner, thereby improving the user experience.

[0148] The following is an explanation of the relevant technical features involved in cell reselection. It should be noted that these explanations are intended to make the embodiments of this application easier to understand and should not be regarded as limiting the scope of protection claimed by this application.

[0149] When the terminal device is in the RRC idle state (RRC_IDLE), due to the movement of the terminal device or the different fading of the cell edge channel, the reception quality of the signals from different access network devices to the terminal device is different, which will cause the terminal device to reselect between different cells.

[0150] Exemplarily, after the terminal device resides in a suitable cell and stays there for an appropriate time (such as 1s), it can perform a cell reselection process. Specifically, the terminal device can sort the cells that meet the S criterion in the candidate list for cell reselection according to the R criterion, for example, sorting them in order from high to low according to the signal quality level of the cells. For the cell with the highest ranking, that is, the highest-ranked cell, when the terminal device resides in the current resident cell for longer than 1s, and the time that the highest-ranked cell is not the resident cell of the terminal device is longer than the preset time (i.e., the reselection time), the terminal device can reselect to the highest-ranked cell and continue to perform the cell reselection process as described above in the highest-ranked cell.

[0151] The S criterion and the R criterion are introduced below.

[0152] (1) Meeting the S criterion may mean that: Srxlev>0 and Squal>0 are met. Only when a cell meets the S criterion can the terminal device choose to camp on the cell.

[0153] Where Srxlev = Qrxlevmeas - (Qrxlevmin + Qrxlevminoffset) – Pcompensation

[0154] Squal=Qqualmeas-(Qqualmin+Qqualminoffset)

[0155] Qrxlevmeas: The received signal level value of the cell, such as RSRP.

[0156] Qrxlevmin: The minimum receiving level value of the cell.

[0157] Qrxlevminoffset: The minimum receive signal level offset value of the cell.

[0158] Pcompensation: The value is max (PMax-UE Maximum Output Power, 0).

[0159] PMax: The maximum transmission power of the terminal device allowed in the cell.

[0160] UE Maximum Output Power: The maximum RF output power capability of the terminal device itself.

[0161] Qqualmeas: The received signal quality of the cell, such as RSRQ.

[0162] Qqualmin: The minimum received signal quality value of the cell.

[0163] Qqualminoffset: The minimum received signal quality offset value of the cell.

[0164] (2) The signal quality levels Rs and Rn of the resident cell and neighboring cell are defined as:

[0165] Rs=Qmeas,s+Qhyst

[0166] Rn=Qmeas,n-Qoffset

[0167] Qmeas,s: RSRP of the resident cell measured by the terminal device.

[0168] Qhyst: reselection hysteresis value of the resident cell.

[0169] Qmeas,n: RSRP of neighboring cells measured by the terminal device.

[0170] Qoffset: If the neighbor cell and the resident cell are co-frequency cells, this value is the cell-level offset broadcast in the system message of the resident cell, and the default value is 0; if the neighbor cell and the resident cell are inter-frequency cells, this value is the sum of the cell-level offset and the carrier frequency offset broadcast in the system message of the resident cell, and the default value is 0.

[0171] In addition, cell reselection can be divided into intra-frequency cell reselection and inter-frequency cell reselection. In the embodiments of the present application, intra-frequency cell reselection will be described as an example, and inter-frequency cell reselection can be implemented accordingly.

[0172] According to the above description of cell reselection, the terminal device determines whether to trigger cell reselection based on the RSRP, RSRQ, or SINR of the resident cell and neighboring cells. Similar to the cell switching described above, in some special scenarios (such as high-speed rail scenarios or cell edge interference scenarios), judging whether to trigger cell reselection based on the RSRP of the resident cell and neighboring cells may result in untimely cell reselection, causing the terminal device to reside in a suboptimal cell, affecting the access performance of the terminal device (for example, random access of the terminal device may take a long time).

[0173] Based on this, an embodiment of the present application provides a wireless communication method for a terminal device to solve the technical problem that the cell reselection is not timely enough, which affects the access performance of the terminal device. In an embodiment of the present application, the terminal device can determine whether to trigger cell reselection based on the RSRP and SINR of the resident cell and the neighboring cell, or the terminal device can also determine whether to trigger cell reselection based on the RSRQ and SINR of the resident cell and the neighboring cell; that is, the terminal device can determine whether to trigger cell reselection based on two of the three indicators. Compared with the existing technology of determining whether to trigger cell reselection based on one of the indicators, this method can more comprehensively consider the communication quality of the cell, thereby enabling the terminal device to reselect to a cell with better communication quality in a timely manner.

[0174] The following describes the process of the wireless communication method provided by the embodiment of the present application in conjunction with Example 2. In Example 2, the terminal device will be described as an example of determining whether to trigger cell reselection based on the RSRP and SINR of the resident cell and neighboring cells. It is understandable that the RSRP involved in Example 2 can also replace RSRQ.

[0175] Example 2

[0176] Figure 5 This is a flow chart corresponding to the wireless communication method provided in Example 2 of the present application, such as Figure 5 As shown, the method includes:

[0177] S501: The first access network device sends reselection configuration information to the terminal device in the cell where the terminal device resides.

[0178] Here, the first access network device may send the reselection configuration information via a system message (e.g., system information block (SIB) 3, SIB4, SIB5). Exemplarily, the reselection configuration information may include reselection indication information of the resident cell, reselection indication information of the neighboring cell, and indication information of the reselection condition.

[0179] Exemplarily, the reselection indication information of the resident cell may include the center frequency of the resident cell, the minimum reception level value of the cell, the minimum received signal quality value, and the corresponding offset value; the reselection indication information of the neighboring cell may include the center frequency of the neighboring cell, the minimum reception level value of the cell, the minimum received signal quality value, and the corresponding offset value. The reselection condition may be that the time duration that the highest-ranked cell after sorting according to the R criterion is not the resident cell of the terminal device is greater than a preset time duration (i.e., the reselection time); the indication information of the reselection condition may include the values ​​of the parameters (such as Qhyst, Qoffset) required for the calculation of the formula of the R criterion, the reselection time, etc.

[0180] Accordingly, in S502, the terminal device may receive reselection configuration information from the camped cell.

[0181] S503, the terminal device determines whether it is in the target mode. If it is in the target mode, S504 to S506 can be executed. If it is not in the target mode, the specific execution process can refer to the existing technology.

[0182] Here, the target mode may be a high-speed rail mode or a cell edge interference mode or other possible modes, which are not specifically limited. The implementation of the terminal device determining whether it is in the target mode can refer to S403 in the first embodiment.

[0183] S504: The terminal device obtains the RSRP and SINR of the resident cell according to the reselection configuration information.

[0184] Exemplarily, the terminal device may receive a downlink signal (such as an SSB or other possible pilot signal) from the resident cell according to the central frequency of the resident cell, and then measure the RSRP and SINR of the resident cell.

[0185] S505: The terminal device obtains the RSRP and SINR of the neighboring cell according to the reselection configuration information.

[0186] Exemplarily, the terminal device may receive a downlink signal (such as an SSB or other possible pilot signal) from a neighboring cell according to the center frequency of the neighboring cell, and then measure the RSRP and SINR of the neighboring cell.

[0187] S506: The terminal device determines whether to trigger cell reselection based on the RSRP and SINR of the resident cell and the RSRP and SINR of the neighboring cell.

[0188] Exemplarily, the terminal device can reselect to the neighboring cell based on the RSRP and SINR of the resident cell and the RSRP and SINR of the neighboring cell when the RSRP of the resident cell and the RSRP of the neighboring cell do not meet the reselection conditions from the resident cell, but the SINR of the neighboring cell is better than the SINR of the resident cell.

[0189] The following describes some possible implementations of the terminal device reselecting to a neighboring cell in combination with implementation methods 1 to 3.

[0190] Implementation 1

[0191] In implementation manner 1, the above S506 may include:

[0192] a1. The terminal device determines whether the SINR of the resident cell and the SINR of the neighboring cell meet the fifth preset condition based on the SINR of the resident cell and the SINR of the neighboring cell. If the fifth preset condition is met, a2 can be executed.

[0193] The fifth precondition is: M SINR n>M SINR p+Offset2

[0194] Among them, M SINR p is the SINR of the cell where the user resides, M SINR n is the SINR of the neighboring cell, and Offset2 is the offset value.

[0195] It should be noted that the value of Offset2 may be pre-set for the terminal device or pre-defined by the protocol, and is not specifically limited. For example, the value of Offset2 may be 3dB.

[0196] a2. The terminal device determines whether the RSRP of the resident cell and the RSRP of the neighboring cell meet a sixth preset condition based on the RSRP of the resident cell and the RSRP of the neighboring cell. If the sixth preset condition is met, a3 can be executed.

[0197] The sixth precondition is: Rn'>Rs

[0198] Rn'=Qmeas,n-Qoffset+Qoffset bySINR-1 , Rs=Qmeas,s+Qhyst

[0199] Among them, Qoffset bySINR is the third offset.

[0200] It should be noted that the third offset can be understood as an offset caused by the SINR of the neighboring cell being better than the SINR of the resident cell, or in other words, the third offset is determined based on the SINR of the neighboring cell and the SINR of the resident cell.

[0201] As a possible implementation, Qoffset bySINR-1 The value of can be pre-set for the terminal device, or can be pre-defined by the protocol, and there is no specific limitation. bySINR-1 The value of Qoffset can be 2dB. As another possible implementation, bySINR-1 The value of Qoffset can also be adaptively adjusted by the terminal device according to a preset rule. For example, the preset rule can be that the greater the difference between the SINR of the neighboring cell and the SINR of the resident cell, the greater the Qoffset value. bySINR-1 The larger the value, the greater the value. The specific implementation is not limited.

[0202] a3. The terminal device starts a second timer (the duration of the second timer is equal to the reselection time).

[0203] If the terminal device determines that the fifth preset condition and the sixth preset condition mentioned above are continuously met within the reselection time after the second timer is started, it will reselect to the neighboring cell after the second timer times out.

[0204] Implementation 2

[0205] In implementation manner 2, the above S506 may include:

[0206] b1: The terminal device determines whether the SINR of the resident cell and the SINR of the neighboring cell meet a fifth preset condition based on the SINR of the resident cell and the SINR of the neighboring cell. If the fifth preset condition is met, b2 may be executed. For the fifth preset condition, see the above implementation method 1.

[0207] b2. The terminal device determines whether the RSRP of the resident cell and the RSRP of the neighboring cell meet the seventh preset condition based on the RSRP of the resident cell and the RSRP of the neighboring cell. If the seventh preset condition is met, b3 can be executed.

[0208] The fifth precondition is: Rn>Rs'

[0209] Rn=Qmeas,n–Qoffset, Rs’=Qmeas,s+Qhyst–Qoffset bySINR-2

[0210] Among them, Qoffset bySINR-2 is the fourth offset.

[0211] It should be noted that the fourth offset can be understood as an offset caused by the fact that the SINR of the neighboring cell is better than the SINR of the resident cell, or in other words, the fourth offset is determined according to the SINR of the neighboring cell and the SINR of the resident cell.

[0212] As a possible implementation, Qoffset bySINR-2 The value of can be pre-set for the terminal device, or can be pre-defined by the protocol, and there is no specific limitation. bySINR-2 The value of Qoffset can be 2dB. As another possible implementation, bySINR-2 The value of can also be adaptively adjusted by the terminal device according to preset rules, and the specific implementation is not limited.

[0213] In one example, the third offset and the fourth offset may have the same value.

[0214] b3, the terminal device starts a second timer (the duration of the second timer is equal to the reselection time).

[0215] If the terminal device determines that the fifth preset condition and the seventh preset condition mentioned above are continuously met within the reselection time after the second timer is started, it will reselect to the neighboring cell after the second timer expires.

[0216] Implementation 3

[0217] In implementation manner 3, the above S506 may include:

[0218] c1: The terminal device determines whether the SINR of the resident cell and the SINR of the neighboring cell meet a fifth preset condition based on the SINR of the resident cell and the SINR of the neighboring cell. If the fifth preset condition is met, c2 may be executed. For the fifth preset condition, see the above implementation method 1.

[0219] c2. The terminal device determines whether the RSRP of the resident cell and the RSRP of the neighboring cell meet the eighth preset condition based on the RSRP of the resident cell and the RSRP of the neighboring cell. If the eighth preset condition is met, c3 can be executed.

[0220] The eighth precondition is: Rn'>Rs'

[0221] Rn'=Qmeas,n-Qoffset+Qoffset bySINR-n , Rs'=Qmeas,s+Qhyst+Qoffset bySINR-s

[0222] Among them, Qoffset bySINR-n The offset corresponding to the neighboring cell, Qoffset bySINR-s is the offset corresponding to the resident cell.

[0223] It should be noted that the offset corresponding to the neighbor cell and the offset corresponding to the resident cell can both be understood as offsets caused by the fact that the SINR of the neighbor cell is better than the SINR of the resident cell.

[0224] As a possible implementation, Qoffset bySINR-n 、Qoffset bySINR-s The value of Qoffset can be pre-set for the terminal device, or can be pre-defined by the protocol, and is not limited to this. bySINR-n Can be greater than Qoffset bySINR-s , such as Qoffset bySINR-n The value of Qoffset can be 5dB, bySINR-s The value of Qoffset can be 2dB; for example bySINR-nThe value of Qoffset can be 1dB, bySINR-s The value can be -2dB.

[0225] c3. The terminal device starts a second timer (the duration of the second timer is equal to the reselection time).

[0226] If the terminal device determines that the fifth preset condition and the eighth preset condition mentioned above are continuously met within the reselection time after the second timer is started, it will reselect to the neighboring cell after the second timer expires.

[0227] By adopting the above method, the terminal device can determine whether to trigger cell reselection based on the RSRP (or RSRQ) and SINR of the resident cell and the neighboring cell, thereby being able to more comprehensively consider the communication quality of the cell, so that the terminal device can reselect to a cell with better communication quality in a timely manner, effectively ensuring the access performance of the terminal device.

[0228] Regarding the above-mentioned embodiment 1 and embodiment 2, it should be noted that:

[0229] (1) The above-mentioned Embodiment 1 and Embodiment 2 may be implemented separately or in combination. When Embodiment 1 and Embodiment 2 are implemented in combination, the terminal device may perform cell reselection according to the solution in Embodiment 1 (for example, reselect to the first cell), and after accessing the first cell, perform cell switching using the solution in Embodiment 2, and then switch to another cell.

[0230] (2) The above description focuses on the differences between the first embodiment and the second embodiment. Except for the differences, the first embodiment and the second embodiment can refer to each other.

[0231] (3) The step numbers in the flowcharts described in Examples 1 and 2 are merely examples of the execution process and do not limit the order in which the steps are executed. In the embodiments of this application, there is no strict execution order for steps that have no temporal dependencies. Furthermore, not all steps shown in the flowcharts are mandatory, and steps may be added or deleted based on actual needs.

[0232] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the interaction between the access network device and the terminal device. It can be understood that in order to realize the above functions, the terminal device may include a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0233] In the embodiments of the present application, the terminal device can be divided into functional units according to the above method examples. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or software functional units.

[0234] In the case of an integrated unit, Figure 6 A possible exemplary block diagram of the device involved in the embodiments of the present application is shown. Figure 6 As shown, apparatus 600 may include a processing unit 602 and a communication unit 603. Processing unit 602 is used to control and manage the operations of apparatus 600. Communication unit 603 is used to support communication between apparatus 600 and other devices. Optionally, communication unit 603 is also referred to as a transceiver unit and may include a receiving unit and / or a transmitting unit, each configured to perform receiving and transmitting operations. Apparatus 600 may also include a storage unit 601 for storing program code and / or data of apparatus 600.

[0235] The apparatus 600 may be a terminal device as described in the above embodiments, or may be a chip disposed within the terminal device. The processing unit 602 may support the apparatus 600 in executing the actions of the terminal device described in the above method examples. Alternatively, the processing unit 602 may primarily execute the internal actions of the terminal device described in the method examples, and the communication unit 603 may support communication between the apparatus 600 and other devices.

[0236] Specifically, in one embodiment, the communication unit 603 is used to: receive measurement configuration information from the serving cell, the measurement configuration information including measurement indication information of the serving cell, measurement indication information of the neighboring cell, and indication information of the measurement event reporting condition; the processing unit 602 is used to: obtain the reference signal received power RSRP of the serving cell and the signal to interference and noise ratio SINR of the serving cell according to the measurement configuration information; and, obtain the RSRP of the neighboring cell and the SINR of the neighboring cell according to the measurement configuration information; the communication unit 603 is also used to: when the RSRP of the serving cell and the RSRP of the neighboring cell do not meet the measurement event reporting condition from the serving cell, but the SINR of the neighboring cell is better than the SINR of the serving cell, report the indication information of the measurement event to the serving cell, the indication information of the measurement event being used to indicate that the neighboring cell is better than the serving cell.

[0237] In one possible design, the communication unit 603 is further used to: receive a switching command from the serving cell, the switching command being used to instruct the terminal device to switch to the neighboring cell; and initiate a random access process to the neighboring cell according to the switching command.

[0238] In one possible design, the measurement event is an A3 event.

[0239] In one possible design, the serving cell and the neighbor cell are co-frequency cells.

[0240] In one possible design, the indication information of the measurement event includes the measurement result of the serving cell and the measurement result of the neighbor cell; wherein, the measurement result of the serving cell is determined based on the RSRP of the serving cell; the measurement result of the neighbor cell is determined based on the RSRP of the neighbor cell and a first offset, and the first offset is determined based on the SINR of the neighbor cell and the SINR of the serving cell.

[0241] In one possible design, the indication information of the measurement event includes the measurement result of the serving cell and the measurement result of the neighboring cell; wherein, the measurement result of the serving cell is determined based on the RSRP of the serving cell and a second offset, and the second offset is determined based on the SINR of the neighboring cell and the SINR of the serving cell; the measurement result of the neighboring cell is determined based on the RSRP of the neighboring cell.

[0242] In one possible design, the measurement result of the neighbor cell is better than the measurement result of the serving cell.

[0243] In one possible design, the terminal device is in high-speed rail mode, which is a wireless communication optimization mode pre-set for the terminal device according to the high-speed rail scenario.

[0244] In one possible design, the terminal device is in a cell edge interference mode, and the cell edge interference mode is a wireless communication optimization mode pre-set by the terminal device according to a cell edge interference scenario.

[0245] It should be understood that the division of units in the above device is merely a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. Moreover, the units in the device can all be implemented in the form of software called through processing elements; or they can all be implemented in the form of hardware; or some units can be implemented in the form of software called through processing elements, and some units can be implemented in the form of hardware. For example, each unit can be a separately established processing element, or it can be integrated into a certain chip of the device. In addition, it can also be stored in the memory in the form of a program, called by a certain processing element of the device and perform the function of the unit. In addition, all or part of these units can be integrated together, or they can be implemented independently. The processing element described here can also be a processor, which can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each unit above can be implemented by the integrated logic circuit of the hardware in the processor element or in the form of software called through the processing element.

[0246] In one example, the unit in any of the above devices may be one or more integrated circuits configured to implement the above method, such as one or more application-specific integrated circuits (ASICs), one or more digital singnal processors (DSPs), one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms. For another example, when the unit in the device can be implemented in the form of a processing element scheduler, the processing element can be a processor, such as a general-purpose central processing unit (CPU), or other processor that can call a program. For another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0247] The above-mentioned receiving unit is an interface circuit of the device, which is used to receive signals from other devices. For example, when the device is implemented as a chip, the receiving unit is the interface circuit of the chip used to receive signals from other chips or devices. The above-mentioned sending unit is an interface circuit of the device, which is used to send signals to other devices. For example, when the device is implemented as a chip, the sending unit is the interface circuit of the chip used to send signals to other chips or devices.

[0248] Figure 7 This is a structural diagram of a wireless communication device provided in an embodiment of the present application. The wireless communication device may be a terminal device in an embodiment of the present application. Figure 7 As shown, the wireless communication device may include multiple components, such as an application subsystem, memory, massive storage, a baseband subsystem, a radio frequency integrated circuit (RFIC), a radio frequency front-end (RFFE) device, and an antenna (ANT). These components may be coupled via various interconnect buses or other electrical connection methods.

[0249] like Figure 7 As shown, ANT_1 represents the first antenna, ANT_N represents the Nth antenna, and N is a positive integer greater than 1. Tx represents the transmit path, and Rx represents the receive path. Different numbers represent different paths. Each path can represent a signal processing channel. Among them, FBRx represents the feedback receive path, PRx represents the main receive path, and DRx represents the diversity receive path. HB represents high frequency, and LB represents low frequency. The two refer to the relative high and low frequencies. BB represents baseband. It should be understood that Figure 7 The symbols and components are for illustrative purposes only and are only one possible implementation. The embodiments of the present application also include other implementations. For example, the wireless communication device may include more or fewer paths and more or fewer components.

[0250] Among them, the application subsystem may include one or more processors. The multiple processors may be multiple processors of the same type, or may include a combination of multiple types of processors. In the embodiment of the present application, the processor may be a general-purpose processor or a processor designed for a specific field. For example, the processor may be a central processing unit (CPU), a digital signal processor (DSP), or a microcontroller (MCU). The processor may also be a graphics processing unit (GPU), an image signal processor (ISP), an audio signal processor (ASP), and an AI processor specially designed for artificial intelligence (AI) applications. AI processors include but are not limited to neural network processing units (NPUs), tensor processing units (TPUs), and processors called AI engines.

[0251] Radio frequency integrated circuits (including RFIC 1, and one or more optional RFIC 2) and RF front-end devices can together constitute a radio frequency subsystem. Depending on the signal reception or transmission path, the radio frequency subsystem can also be divided into an RF receive path and an RF transmit path. Among them, the RF receive channel can receive the RF signal through the antenna, process the RF signal (such as amplification, filtering and down-conversion) to obtain a baseband signal, and pass it to the baseband subsystem. The RF transmit channel can receive the baseband signal from the baseband subsystem, process the baseband signal (such as up-conversion, amplification and filtering) to obtain an RF signal, and finally radiate the RF signal into space through the antenna. The radio frequency integrated circuit can be called an RF processing chip or an RF chip.

[0252] Similar to the RF subsystem's primary function of processing RF signals, the baseband subsystem primarily processes baseband signals. The baseband subsystem extracts useful information or data bits from baseband signals or converts them into baseband signals for transmission. These information or data bits can represent user data such as voice, text, and video, or control information. For example, the baseband subsystem performs signal processing operations such as modulation and demodulation, encoding, and decoding. Baseband signal processing operations vary across different radio access technologies, such as 5G NR and 4G LTE.

[0253] Similar to the application subsystem, the baseband subsystem may also include one or more processors. Furthermore, the baseband subsystem may also include one or more hardware accelerators (HACs). Hardware accelerators can be used to specifically perform sub-functions with high processing overhead, such as data packet assembly and parsing, data packet encryption and decryption, etc. These sub-functions can also be implemented using general-purpose processors, but due to performance or cost considerations, hardware accelerators may be more appropriate. In specific implementations, hardware accelerators are primarily implemented using application-specific integrated circuits (ASICs). Of course, hardware accelerators may also include one or more relatively simple processors, such as MCUs.

[0254] The baseband subsystem can be integrated into one or more chips, which are referred to as baseband processing chips or baseband chips. The baseband subsystem can also be implemented as a standalone chip, which is referred to as a modem or modem chip. The baseband subsystem can be manufactured and sold as a modem chip. Modem chips are sometimes also referred to as baseband processors or mobile processors. Furthermore, the baseband subsystem can be further integrated into a larger chip, which is also manufactured and sold as a larger chip. This larger chip is referred to as a system-on-chip (SoC), a system-on-chip (SoC), or simply an SoC chip. The software components of the baseband subsystem can be built into the chip's hardware components before the chip leaves the factory, imported from other non-volatile memory into the chip's hardware components after the chip leaves the factory, or downloaded and updated online via the network.

[0255] In addition, the wireless communication device may also include a memory, such as Figure 7The memory and mass storage in the system. In addition, the application subsystem and baseband subsystem may each include one or more caches. In specific implementations, memory can be divided into volatile memory (volatile memory) and non-volatile memory (NVM). Volatile memory refers to memory in which the data stored will be lost when the power supply is interrupted. Currently, volatile memory is mainly random access memory (RAM), including static random access memory (SRAM) and dynamic random access memory (DRAM). Non-volatile memory refers to memory in which the data stored will not be lost even if the power supply is interrupted. Common non-volatile memories include read-only memory (ROM), optical disks, magnetic disks, and various memories based on flash memory technology. Generally speaking, volatile memory can be used for memory and cache, and non-volatile memory, such as flash memory, can be used for mass storage.

[0256] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0257] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0258] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0259] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0260] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A wireless communication method, characterized in that: include: receiving measurement configuration information from a serving cell, the measurement configuration information including measurement indication information of the serving cell, measurement indication information of neighboring cells, and indication information of measurement event reporting conditions; Acquire, according to the measurement configuration information, a reference signal received power (RSRP) of the serving cell and a signal to interference plus noise ratio (SINR) of the serving cell; Acquire the RSRP of the neighboring cell and the SINR of the neighboring cell according to the measurement configuration information; When the RSRP of the serving cell and the RSRP of the neighboring cell do not meet the measurement event reporting condition from the serving cell, but the SINR of the neighboring cell is better than the SINR of the serving cell, reporting the indication information of the measurement event to the serving cell, where the indication information of the measurement event is used to indicate that the neighboring cell is better than the serving cell.

2. The method according to claim 1, characterized in that The method further comprises: receiving a handover command from the serving cell, where the handover command is used to instruct the terminal device to handover to the neighboring cell; Initiate a random access process to the neighbor cell according to the handover command.

3. The method according to claim 1, characterized in that The measurement event is an A3 event.

4. The method according to claim 1, wherein The serving cell and the neighboring cell are co-frequency cells.

5. The method according to claim 1, wherein The indication information of the measurement event includes a measurement result of the serving cell and a measurement result of the neighboring cell; The measurement result of the serving cell is determined based on the RSRP of the serving cell; the measurement result of the neighboring cell is determined based on the RSRP of the neighboring cell and a first offset, and the first offset is determined based on the SINR of the neighboring cell and the SINR of the serving cell.

6. The method according to claim 1, characterized in that The indication information of the measurement event includes a measurement result of the serving cell and a measurement result of the neighboring cell; The measurement result of the serving cell is determined based on the RSRP of the serving cell and a second offset, the second offset is determined based on the SINR of the neighboring cell and the SINR of the serving cell; the measurement result of the neighboring cell is determined based on the RSRP of the neighboring cell.

7. The method according to claim 5 or 6, characterized in that The measurement result of the neighbor cell is better than the measurement result of the serving cell.

8. The method according to any one of claims 1 to 6, characterized in that The terminal device is in high-speed rail mode, which is a wireless communication optimization mode pre-set by the terminal device according to the high-speed rail scenario.

9. The method according to any one of claims 1 to 6, characterized in that The terminal device is in a cell edge interference mode, where the cell edge interference mode is a wireless communication optimization mode pre-set by the terminal device according to a cell edge interference scenario.

10. A communication device, characterized in that: The method comprises means for performing the steps of the method according to any one of claims 1 to 9.

11. A communication device, characterized in that: The communication device comprises a processor coupled to a memory, wherein a computer program is stored in the memory; the processor is used to call the computer program in the memory so that the communication device executes the method according to any one of claims 1 to 9.

12. A communication device, characterized in that: The system comprises at least one processor and an interface circuit, wherein the at least one processor is configured to communicate with other devices through the interface circuit and execute the method according to any one of claims 1 to 9.

13. A computer-readable storage medium, characterized in that The storage medium stores a computer program, and when the computer program is executed by the communication device, the method according to any one of claims 1 to 9 is implemented.

14. A computer program product, characterized in that When a computer reads and executes the program or instructions in the computer program product, the method according to any one of claims 1 to 9 is performed.

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