WO2022067814A1 - 通信方法及装置 - Google Patents

通信方法及装置 Download PDF

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Publication number
WO2022067814A1
WO2022067814A1 PCT/CN2020/119745 CN2020119745W WO2022067814A1 WO 2022067814 A1 WO2022067814 A1 WO 2022067814A1 CN 2020119745 W CN2020119745 W CN 2020119745W WO 2022067814 A1 WO2022067814 A1 WO 2022067814A1
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WO
WIPO (PCT)
Prior art keywords
cell
information
configuration information
cho
terminal device
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PCT/CN2020/119745
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English (en)
French (fr)
Inventor
吴烨丹
耿婷婷
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN202080105221.9A priority Critical patent/CN116235540A/zh
Priority to PCT/CN2020/119745 priority patent/WO2022067814A1/zh
Publication of WO2022067814A1 publication Critical patent/WO2022067814A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a communication method and apparatus.
  • Non-terrestrial networks (NTN) communication systems provide seamless coverage for terminal equipment by deploying the functions of access network equipment or part of access network equipment on non-terrestrial equipment such as high-altitude platforms or satellites. Or the satellite is located in the high sky and is less affected by natural disasters, therefore, the reliability of the NTN communication system is high.
  • NTN Non-terrestrial networks
  • the network in the NTN communication system can configure conditional handover (CHO) for terminal equipment, and also has a corresponding failure handling mechanism when CHO fails.
  • CHO conditional handover
  • the criterion for judging whether the CHO execution condition is satisfied according to the signal quality is usually adopted. Therefore, the existing CHO failure processing mechanism is also implemented based on the CHO execution condition of the signal quality.
  • a communication method and device in the embodiments of the present application are used to provide a CHO failure processing mechanism in a scenario where a CHO execution condition based on location information and/or time information and/or signal quality information is adopted, so as to reduce the number of CHO failures caused by CHO Interruption delay caused by failure, improve system performance.
  • an embodiment of the present application provides a communication method, and the method can be executed by a terminal device or by a component (for example, a chip or a circuit) configured in the terminal device.
  • the method may include: the terminal device receives N pieces of conditional handover CHO configuration information from the source network device, each CHO configuration information indicates a CHO execution condition of a candidate cell corresponding to the CHO configuration information, and the CHO execution condition is based on the location information and /or CHO execution condition of time information and/or signal quality information, N is an integer greater than 1; the terminal device in the source cell before the CHO execution condition indicated by any CHO configuration information in the N CHO configuration information is satisfied A radio link failure occurs; the terminal device determines the first cell to be accessed according to the N CHO configuration information, the current location and/or the current time and/or the current signal quality of the terminal device.
  • the CHO execution condition is a CHO execution condition based on location information and/or time information and/or signal quality information, when the terminal device has a wireless link in the source cell before the CHO execution condition is satisfied.
  • CHO failure handling mechanism on failure The terminal device can determine the cell to restore the connection according to the location, time, signal quality and CHO configuration information when the wireless link failure occurs, so that the terminal device can perform reasonable processing after the wireless link failure occurs, reducing the risk of radio link failure.
  • the resulting interruption delay improves system performance.
  • the terminal The device may determine that the first cell is the first candidate cell corresponding to the first CHO configuration information, and then access the first cell according to the first CHO configuration information.
  • the terminal device may determine the first cell Not a candidate cell; the terminal device can re-establish in this first cell.
  • the method further includes: the terminal device generates a first report, and reports the first report to the first network device, wherein, The first report includes one or more of the following information: cell information of the access failure cell, connection failure type, cell information of the source cell, information of the cell to restore the connection after a radio link failure, the source cell being the terminal.
  • the C-RNTI allocated by the device the time information when the wireless link failure occurs, the time period information from the occurrence of the wireless link failure to the connection recovery, the time period information from the occurrence of the wireless link failure to reporting the first report, and the connection recovery time to reporting the first report. Time period information of a report, location information of the terminal device when a radio link failure occurs, and respective signal qualities of the source cell and/or each candidate cell.
  • an embodiment of the present application provides a communication method, and the method can be executed by a terminal device or by a component (for example, a chip or a circuit) configured in the terminal device.
  • the method may include: the terminal device receives N pieces of conditional handover CHO configuration information from the source network device, each CHO configuration information indicates a CHO execution condition of a candidate cell corresponding to the CHO configuration information, and the CHO execution condition is based on the location information and /or CHO execution condition of time information and/or signal quality, N is an integer greater than 1; the terminal device executes to the CHO execution condition indicated by the second CHO configuration information in the N pieces of CHO configuration information after the CHO execution condition indicated by the second CHO configuration information is satisfied.
  • the CHO execution condition is a CHO execution condition based on location information and/or time information and/or signal quality information, when the terminal equipment accesses in a candidate cell after the CHO execution condition is satisfied.
  • the terminal device can determine the cell to be accessed according to the location, time, signal quality and CHO configuration information when the access or handover failure occurs, so that the terminal device can perform reasonable processing after the access or handover failure, and reduce the number of problems caused by access. Or the interruption and delay caused by the switching failure, improve the system performance.
  • the terminal The device may determine that the first cell is the first candidate cell corresponding to the first CHO configuration information, and further, the terminal device may access the first cell, that is, the first candidate cell, according to the first CHO configuration information.
  • the terminal device may determine that the first cell is the source cell, and then the terminal device may perform re-establishment in the source cell.
  • the terminal device may determine that the first cell is neither a candidate cell nor a source cell; further, the terminal device may perform re-establishment in the determined first cell.
  • the method further includes: the terminal device generates a second report, and reports the second report to the first network device , where the second report includes one or more of the following information: cell information of the access failure cell, time period information from receiving the second CHO configuration information to handover trigger, handover trigger to access failure time period information, the time period information from the access failure to the connection recovery, the time period information from the connection recovery to the reporting of the second report, the time period information from the access failure to the reporting of the second report, the time period information when the access fails Time information, location information of the terminal device when the access fails, and respective signal qualities of the source cell and/or each candidate cell.
  • the second report includes one or more of the following information: cell information of the access failure cell, time period information from receiving the second CHO configuration information to handover trigger, handover trigger to access failure time period information, the time period information from the access failure to the connection recovery, the time period information from the connection recovery to the reporting of the second report, the time period information from the access failure to the reporting of the second report, the time period information when
  • an embodiment of the present application provides a communication method, and the method can be executed by a terminal device or by a component (for example, a chip or a circuit) configured in the terminal device.
  • the method may include: the terminal device receives N pieces of conditional handover CHO configuration information from the source network device, each CHO configuration information indicates a CHO execution condition of a candidate cell corresponding to the CHO configuration information, and the CHO execution condition is based on the location information and /or CHO execution condition of time information and/or signal quality, N is an integer greater than 1; the terminal device receives a message from the source before the CHO execution condition indicated by any CHO configuration information in the N CHO configuration information is satisfied.
  • the first message of the network device instructs to perform traditional handover; if the traditional handover performed by the terminal device fails, the terminal device may, according to the N CHO configuration information, the current location and/or current time of the /or the current signal quality, to determine the first cell to be accessed.
  • the CHO execution condition is a CHO execution condition based on location information and/or time information and/or signal quality information, when the terminal device receives a message from the source network before the CHO execution condition is satisfied.
  • the device indicates the first message to perform the traditional handover, but the CHO failure processing mechanism when the executed traditional handover fails.
  • the terminal device can determine the cell to be accessed according to the location, time, signal quality and CHO configuration information when the traditional handover fails, so that the terminal device can handle the traditional handover failure reasonably and reduce the interruption caused by the handover failure. delay and improve system performance.
  • the terminal device may be determined to be the first candidate cell corresponding to the first CHO configuration information; further, the terminal device may access the first cell, that is, the first candidate cell, according to the first CHO configuration information.
  • the terminal device may determine that the first cell is the source cell, and further, the terminal device may perform re-establishment in the source cell.
  • the terminal device may determine that the first cell is neither a candidate cell nor a source cell; further, the terminal device may perform re-establishment in the determined first cell.
  • the method further includes: the terminal device may generate a third report, and report the third report to the first network device, wherein the The third report includes one or more of the following information: time period information from receiving the CHO configuration information to receiving the first message, time period information from receiving the first message to the failure of traditional handover, failure of traditional handover Time period information until the connection is restored, time period information when the connection is restored to reporting the third report, time period information when the traditional handover fails to report the third report, time information when the traditional handover fails, and terminal equipment when the traditional handover fails location information, source cell and/or respective signal quality of each candidate cell.
  • an embodiment of the present application provides a communication device, the device has the function of implementing the first aspect or the terminal device in any possible design of the first aspect, and may also have the function of implementing the second aspect or the second aspect.
  • the function of the terminal device in any possible design of the aspect may also have the function of the terminal device in any possible design of the third aspect or the third aspect, and the device may be a terminal device or a terminal Chip included in the device.
  • the functions of the above communication apparatus may be implemented by hardware, or by executing corresponding software in hardware, and the hardware or software includes one or more modules or units or means corresponding to the above functions.
  • the structure of the apparatus includes a processing module and a transceiver module, wherein the processing module is configured to support the apparatus to perform the corresponding functions of the terminal device in the first aspect or any design of the first aspect , or perform the corresponding function of the terminal device in the above-mentioned second aspect or any design of the second aspect, or perform the corresponding function of the terminal device in the above-mentioned third aspect or any possible design of the third aspect.
  • the transceiver module is used to support communication between the device and other communication devices. For example, when the device is a terminal device, it can receive N pieces of CHO configuration information from the source network device.
  • the communication device may also include a storage module, which is coupled to the processing module and stores necessary program instructions and data of the device.
  • the processing module may be a processor
  • the communication module may be a transceiver
  • the storage module may be a memory
  • the memory may be integrated with the processor, or may be provided separately from the processor.
  • the structure of the apparatus includes a processor and may also include a memory.
  • the processor is coupled to the memory and can be used to execute computer program instructions stored in the memory to cause the apparatus to perform the method in the first aspect or any possible design of the first aspect above, or the second aspect or the second aspect above The method in any possible design of the above-mentioned third aspect or the method in any possible design of the third aspect is performed.
  • the apparatus further includes a communication interface, and the processor is coupled to the communication interface.
  • the communication interface may be a transceiver or an input/output interface; when the device is a chip included in the terminal device, the communication interface may be an input/output interface of the chip.
  • the transceiver may be a transceiver circuit, and the input/output interface may be an input/output circuit.
  • an embodiment of the present application provides a chip system, including: a processor, where the processor is coupled to a memory, and the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor , so that the chip system implements the above-mentioned first aspect or the method in any possible design of the first aspect, or realizes the above-mentioned second aspect or the method in any possible design of the second aspect, or realizes the above-mentioned first aspect.
  • the method in the three aspects or any possible design of the third aspect.
  • the chip system further includes an interface circuit, and the interface circuit is used for exchanging code instructions to the processor.
  • the number of processors in the chip system may be one or more, and the processors may be implemented by hardware or software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor implemented by reading software codes stored in memory.
  • the number of memories in the system-on-chip may also be one or more.
  • the memory can be integrated with the processor, or can be provided separately from the processor.
  • the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be provided on different chips.
  • an embodiment of the present application provides a computer-readable storage medium on which a computer program or instruction is stored, and when the computer program or instruction is executed, causes the computer to execute the first aspect or any one of the first aspects.
  • an embodiment of the present application provides a computer program product that, when a computer reads and executes the computer program product, causes the computer to execute the method in the first aspect or any possible design of the first aspect, Or execute the method in the second aspect or any possible design of the second aspect, or execute the method in the third aspect or any possible design of the third aspect.
  • an embodiment of the present application provides a communication system, where the communication system includes a source network device and a terminal device.
  • the communication system may further include at least one candidate target network device.
  • the communication system may further include a first network device, and the first network device may be a source network device or a target network device or a network device or other network device to which the re-established cell (ie the cell to which the connection is restored) belongs.
  • the communication system may also include core network equipment.
  • FIG. 1a and 1b are schematic diagrams of the network architecture of a satellite communication system to which the embodiments of the application are applicable;
  • Fig. 2 is the schematic diagram of the ground stationary cell that mobile satellite forms
  • FIG. 3 is a schematic diagram of a ground mobile cell formed by a mobile satellite
  • Fig. 4 is the handover flow schematic diagram under the CHO mechanism
  • FIG. 5 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a terminal device reporting a first report to a first network device in an embodiment of the application
  • FIG. 7 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 10 is another schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 11 is another schematic structural diagram of a communication apparatus according to an embodiment of the present application.
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio General packet radio service
  • LTE LTE system
  • FDD frequency division duplex
  • TDD LTE time division duplex
  • UMTS universal mobile telecommunication system
  • 5G 5th generation
  • the technical solutions provided in the embodiments of the present application may be applied to a non-terrestrial network (NTN) communication system, and may also be applied to a mixed deployment scenario of NTN and terrestrial networks (terrestrial networks, TN).
  • NTN non-terrestrial network
  • TN terrestrial networks
  • the NTN communication system may include a satellite communication system, a high altitude platform station (HAPS) communication system, or other non-terrestrial communication systems.
  • HAPS high altitude platform station
  • the following takes the NTN communication system as a satellite communication system as an example to describe the network architecture applied in the present application in detail.
  • FIG. 1a is a schematic diagram of a network architecture of a satellite communication system to which the embodiments of the present application are applied.
  • the network architecture includes a core network device 110, a radio access network device 120, a satellite 130, and at least one terminal device (as shown in FIG. 1a ).
  • the core network equipment, radio access network equipment and terminal equipment in FIG. 1a are located on the ground, and the satellites are located in the high sky.
  • the wireless access network equipment may communicate with the core network equipment in a wireless or wired manner.
  • the core network device and the radio access network device can be independent and different physical devices, or the functions of the core network device and the logical functions of the radio access network device can be integrated on the same physical device, or they can be one physical device. It integrates the functions of some core network equipment and some functions of the wireless access network equipment.
  • the wireless access network devices mentioned in the embodiments of the present application may correspond to different devices in different communication systems, for example, the 5G system corresponds to the 5G access network devices, such as gNB or ng-eNB, The 4G system corresponds to the access network equipment in 4G, such as eNB or en-gNB.
  • the communication between the wireless access network equipment and the terminal equipment transmits signals through satellites, that is, the satellite can receive the signals of the wireless access network equipment and forward the signals to the ground to form a satellite cell, thereby providing service coverage for the terminal equipment on the ground.
  • the satellite is equivalent to a relay node or transponder, so this scenario can also be called a transparent form of the satellite.
  • the satellite cell can be fixed on the ground (can be marked as “fixed cell”), or it can move on the ground with the movement of the satellite (can be marked as “mobile cell”).
  • the satellite cell is fixed on the ground, which means that the coverage of the satellite cell on the ground is fixed, either for a period of time or permanently.
  • the satellite cell formed by it is generally also fixed relative to the ground.
  • the satellite can adjust the launch angle of its antenna or other physical parameters, so that the formed satellite cell is fixed relative to the ground.
  • the satellite cell moves with the movement of the satellite, that is, when the satellite moves, the satellite cell also follows the satellite to move on the ground.
  • the reason for the mobile cell is that the satellite does not dynamically adjust the direction of the beam as the satellite moves, so that the projection of the beam generated by the satellite on the ground moves with the movement of the satellite.
  • a possible mobile cell existence scenario may be: the satellite establishes a connection with the original wireless access network equipment, and with the movement of the satellite, the original wireless access network equipment forwarded by the satellite The lower cell moves with the satellite for a period of time, that is, the satellite maintains a connection with the original wireless access network equipment for a period of time; When disconnected, the satellite is connected to a new wireless access network device, after which the satellite starts to forward the signal of the new wireless access network device to form a new satellite cell. It can be understood that although the satellite is running continuously, the location of the wireless access network equipment on the ground does not change.
  • the moving range of the satellite cell is usually around the periphery of the radio access network device.
  • FIG. 1b is a schematic diagram of another network architecture of a satellite communication system to which the embodiments of the present application are applied
  • the network architecture includes a core network device 110, a satellite 130, and at least one terminal device (the terminal device shown in FIG. 1b). 140).
  • the core network equipment and terminal equipment in Fig. 1b are located on the ground, while the satellites are located high in the sky.
  • a radio access network device such as a base station
  • the satellite can generate the cell signal by itself and forward it to the ground to form a satellite cell, thereby providing service coverage area for the terminal equipment on the ground. Therefore, this scenario may also be referred to as a regenerative form of the satellite.
  • the satellite cell moves with the movement of the satellite, that is, when the satellite moves, the cell generated by it also moves on the ground, so it can be called a "moving cell". Since the “mobile cell” is generated by the satellite itself, the “mobile cell” of the satellite can move on the ground following the orbit of the satellite. Under normal circumstances, when a satellite is removed, new satellites will be moved over to ensure continuous coverage as much as possible.
  • the coverage area of the new satellite may or may not be the same as the coverage area of the previous satellite. It can be understood that the ground coverage areas of the two satellites may not necessarily be exactly the same due to differences in the satellite's running direction, beam launch direction, and beam launch capability.
  • one radio access network device or satellite or core network device may provide services for one or more terminal devices, and the embodiments of the present application may provide services for the satellite communication
  • the number of core network devices, wireless access network devices, satellites and terminal devices included in the system is not limited.
  • the terminal device may be fixed or movable, which is not limited in this application.
  • the wireless access network equipment and the terminal equipment and between the terminal equipment and the terminal equipment can communicate through the licensed spectrum (licensed spectrum), can also communicate through the unlicensed spectrum (unlicensed spectrum), and can also communicate through the licensed spectrum and unlicensed spectrum for communications.
  • the radio access network equipment and the terminal equipment and between the terminal equipment and the terminal equipment can communicate through the frequency spectrum below 6 gigahertz (gigahertz, GHz), and can also communicate through the frequency spectrum above 6 GHz, and can also use the frequency below 6 GHz at the same time. spectrum and the spectrum above 6GHz to communicate.
  • This embodiment of the present application does not limit the spectrum resources used between the radio access network device and the terminal device.
  • FIG. 2 it is a schematic diagram of a ground stationary cell formed by a mobile satellite.
  • This figure shows an ideal scenario, that is, the ground cell is completely stationary. When one satellite is removed, another satellite will completely cover the previous cell area. .
  • the mapping method of the ground stationary cell means that the location of the cell does not move on the ground, and the mobile satellite can form these cells by adjusting its own beam. It should be understood that when the satellite cell is a terrestrial stationary cell, the mobile satellite can provide a service coverage area in the form of transparent forwarding.
  • cell 1 and cell 2 are covered by the beam of satellite 1, and cell 3 and cell 4 are covered by the beam of satellite 2.
  • both satellite 1 and satellite 2 move to the left, they can still adjust their own beams to ensure the coverage of cell 1, cell 2, cell 3, and cell 4.
  • satellite 1 and satellite 2 have moved a sufficient distance. Satellite 1 cannot provide coverage for cell 2 by adjusting the beam, and satellite 2 cannot provide coverage for cell 4 by adjusting the beam. At this time, Satellite 2 can provide coverage for cell 2, while satellite 3 can provide coverage for cell 4.
  • FIG. 3 it is a schematic diagram of a ground mobile cell formed by a mobile satellite.
  • the mapping method of the ground mobile cell means that the mobile satellite does not dynamically adjust its beam direction, and the beam generated by the base station moves on the ground with the movement of the satellite/base station. It should be understood that when the satellite cell is a ground mobile cell, the mobile satellite can provide a service coverage area in a transparent forwarding form or a regeneration form.
  • an area is covered by cell 1 and cell 2 formed by satellite 1, and cell 3 and cell 4 formed by satellite 2. Since cell 1, cell 2, cell 3 and cell 4 move with the movement of satellite 1 and satellite 2, at time T3, this area becomes cell 2 formed by satellite 1, cell 3 and cell 3 formed by satellite 2 in this area. The cell 4 and the cell 5 formed by the newly moved satellite 3 are covered.
  • the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute limitations on the technical solutions provided by the embodiments of the present application.
  • the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • the terminal device involved in the embodiments of this application is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it can also be deployed on water (such as ships, etc.) ); can also be deployed in the air (such as aircraft, balloons and satellites, etc.
  • the terminal equipment can communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN.
  • RAN radio access network
  • the terminal device can be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiver function, a mobile internet device (MID), a wearable device, a virtual reality (virtual reality, VR) terminal device, Augmented reality (AR) terminal equipment, wireless terminal in industrial control, wireless terminal in self driving, wireless terminal in remote medical (remote medical), smart grid (smart grid) ), wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the embodiments of this application are not applicable to application scenarios.
  • the terminal equipment may also be sometimes referred to as user equipment (UE), mobile station, remote station, etc.
  • the embodiments of this application do not limit the specific technology, device form and name used by the terminal equipment.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. Wait.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • Use such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • the terminal device in this embodiment of the present application may also be an on-board module, on-board module, on-board component, on-board chip or on-board unit built into the vehicle as one or more components or units.
  • a module, on-board component, on-board chip or on-board unit may implement the method of the present application.
  • the wireless access network device involved in the embodiments of the present application is a device in the network for connecting a terminal device to a wireless network.
  • the radio access network device may be a node in the radio access network, and may also be called a base station, and may also be called a RAN node.
  • a radio access network device refers to a radio access network device deployed on the ground or on a satellite.
  • a radio access network device may be referred to as an access network device or a network device for short.
  • the access network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in an LTE system or an evolved LTE system (LTE-Advanced, LTE-A), such as a traditional macro base station eNB and
  • the micro base station eNB in the heterogeneous network scenario may also include the next generation node B (gNB) in the 5G system or the NR system, or may also include a radio network controller (radio network controller, RNC), Node B (Node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), transmission reception point (transmission reception point, TRP), home base station (for example, home evolved NodeB , or home Node B, HNB), base band unit (BBU), baseband pool BBU pool, or wireless fidelity (wireless fidelity, WiFi) access point (access point, AP), access backhaul integration (integrated access and backhaul, IAB) no
  • the network device may be a CU node, a DU node, or an access network device including a CU node and a DU node.
  • CU nodes can be divided into control plane (CU-CP) and user plane (CU-UP), wherein CU-CP is responsible for control plane functions, mainly including radio resource control (radio resource control, RRC) and packet data convergence protocol. (packet data convergence protocol, PDCP)-C, PDCP-C is mainly responsible for encryption and decryption of control plane data, integrity protection, data transmission, etc.
  • CU-UP is responsible for the user plane function, mainly including SDAP and PDCP-U.
  • SDAP is mainly responsible for processing the data of the core network and mapping the flow to the bearer.
  • PDCP-U is mainly responsible for the encryption and decryption of the data plane. Integrity protection, header compression, serial number maintenance, data transfer, etc.
  • CU-CP and CU-UP can be connected through E1 interface.
  • CU-CP represents that the CU is connected to the core network through the Ng interface, and is connected to the DU through the F1-C (control plane).
  • CU-UP is connected through F1-U (user plane) and DU.
  • F1-C user plane
  • the core network equipment involved in the embodiments of this application refers to equipment in a core network (core network, CN) that provides service support for terminal equipment.
  • core network equipment include: access and mobility management function (AMF) entity, session management function (SMF) entity, user plane function (UPF) entity etc.
  • the AMF entity is used for access management and mobility management of terminal equipment;
  • the SMF entity is used for session management, such as user session establishment;
  • entities in this application may also be referred to as network elements or functional entities, that is, AMF entities may also be referred to as AMF network elements or AMF functional entities, and SMF entities may also be referred to as SMF network elements or SMF functional entities.
  • the core network device may refer to the AMF.
  • the satellites involved in the embodiments of the present application refer to network devices located on the satellites.
  • the satellites may be low earth orbiting (LEO) or medium orbiting satellites or other network devices that move high in the sky.
  • LEO low earth orbiting
  • GEO geostationary earth orbiting
  • LEO low orbit satellites
  • medium orbit satellites according to their orbital heights.
  • high-orbit satellites can also be called stationary satellites. The operation speed of high-orbit satellites is the same as the rotation speed of the earth. Therefore, high-orbit satellites remain stationary relative to the ground.
  • Low-orbit satellites can also be called low-earth orbit satellites. Low-orbit satellites move relatively fast relative to the ground. Therefore, satellite cells formed by low-orbit satellites can move with the movement of satellites.
  • Medium-orbit satellites refer to satellites whose orbital altitude is between high-orbit satellites and low-orbit satellites.
  • system and “network” in the embodiments of the present application may be used interchangeably.
  • “Plurality” refers to two or more than two, and in view of this, “plurality” may also be understood as “at least two” in the embodiments of the present application.
  • “At least one” can be understood as one or more, such as one, two or more. For example, including at least one means including one, two or more, and does not limit which ones are included. For example, if at least one of A, B, and C is included, then A, B, C, A and B, A and C, B and C, or A and B and C may be included. Similarly, the understanding of descriptions such as “at least one” is similar.
  • 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, sequence, priority, or importance of multiple objects. Moreover, the description of “first” and “second” does not limit the objects to be necessarily different.
  • the cells involved in the embodiments of the present application may be NTN cells, such as satellite cells.
  • the embodiments of the present application can also be applied to a cell handover scenario, where a terminal device may be handed over from a source network device to a target network device due to location movement, service change, network coverage change, or other reasons.
  • the source network device refers to the network device that the terminal device accesses before performing the handover, or the network device that provides services for the terminal device before the handover;
  • the target network device refers to the network device that the terminal device needs to switch to, or The network device that the terminal device accesses after the handover is successfully performed, or the network device that provides services for the terminal device after the handover is successful.
  • the source cell refers to the cell that the terminal device accesses before performing the handover, and the source cell is the cell covered by the source network device, or the source cell is the cell under the jurisdiction of the source network device, or the source cell belongs to the source network device.
  • the target cell refers to the cell that the terminal device accesses after performing handover.
  • the target cell is a cell covered by the target network device, or the target cell is a cell under the jurisdiction of the target network device, or the target cell belongs to the target network device.
  • the above cell handover may be CHO.
  • the network eg, source network device
  • the candidate cells can also be called candidate target cells.
  • the network may send the CHO configuration information corresponding to the multiple candidate cells to the terminal device through one or more RRC messages.
  • the above-mentioned RRC message may be a newly defined message (such as CondRRCReconfiguration, or have other naming/expression forms, which are not limited) or reuse an existing RRC message (such as an RRC reconfiguration message).
  • the source network device may send an RRC message to the terminal device when the signal quality of the source link is good, and the RRC message may include CHO configuration information corresponding to at least one candidate cell.
  • the CHO configuration information corresponding to a candidate cell may include CHO execution condition information and related information of the candidate cell.
  • the relevant information of the candidate cell may include one or more of the following information: the cell radio network temporary identifier (C-RNTI) allocated by the candidate cell to the terminal equipment, the cell radio network temporary identifier (C-RNTI) required for accessing the candidate cell Random access channel (random access channel, RACH) resource information, index information corresponding to the candidate cell (such as the measurement identifier measID corresponding to the cell and/or the CHO reconfiguration identifier CondReconfigId corresponding to the cell), the cell global identifier of the candidate cell ( cell global identifier (CGI), physical cell identifier (PCI) of the candidate cell, frequency information corresponding to the candidate cell, physical layer configuration parameters corresponding to the candidate cell, media access control (MAC) layer configuration Parameters, radio link control (RLC) layer configuration parameters, packet data convergence (PDCP) layer configuration parameters, service data adaptation protocol (service data adaptation protocol, SD AP) layer configuration parameters, RRC Layer configuration parameters, etc.
  • C-RNTI cell radio network temporary identifier
  • the frequency information of the candidate cell may include one or more of the following: the absolute frequency of the synchronization signal block (synchronization signal block, SSB) (such as absoluteFrequencySSB), the absolute frequency position of the reference resource module (common RBO) (such as absoluteFrequencyPointA) , a frequency bandwidth list (such as frequencyBandList), and a subcarrier spacing (subcarrier spacing, SCS) specific carrier list (such as scs-SpecificCarrierList).
  • SSB synchronization signal block
  • common RBO such as absoluteFrequencyPointA
  • a frequency bandwidth list such as frequencyBandList
  • SCS subcarrier spacing
  • the CHO execution condition information is used to indicate the CHO execution condition corresponding to the candidate cell, and the CHO execution condition may also be referred to as a CHO trigger condition.
  • the CHO execution condition information may include the CHO execution event type and the corresponding threshold value.
  • Execution event types may include event A3, event A4, event A5, event B1, event B2, or other execution event types, and the like.
  • a candidate cell can be configured with one or more CHO execution conditions.
  • a candidate cell may be configured with one execution event type, but with at most two different triggers, and at least two different thresholds for each trigger, the trigger being the signal quality of the cell, eg It may include one or more of reference signal received power (reference signal received power, RSRP), reference signal received quality (reference signal received quality, RSRQ), and signal to interference plus noise ratio (signal to interference plus noise ratio, SINR).
  • RSRP reference signal received power
  • RSRQ reference signal received quality
  • SINR signal to interference plus noise ratio
  • one candidate cell may be configured with at least two different execution event types, and thresholds corresponding to each execution event type.
  • the CHO execution event types corresponding to different candidate cells and/or the threshold values corresponding to the execution event types may be the same or different, which are not limited.
  • the source cell, the target cell or the candidate cell in this embodiment of the present application may be the NTN cell introduced above, such as a satellite cell.
  • the service coverage area of the source cell, the target cell or the candidate cell may be divided into multiple areas, and different areas may correspond to different PLMNs and/or different AMFs to form different virtual cells.
  • FIG. 4 exemplarily shows the handover process under the CHO mechanism.
  • the source base station configures two candidate cells for the UE, and the two candidate cells are managed by candidate target base station 1 and candidate target base station 2 respectively.
  • the handover process may include: in step S401, the source base station delivers a measurement configuration to the UE, and correspondingly receives a measurement report reported by the UE in step S402.
  • steps S403-a and S404-a the source base station and the candidate target base station 1 perform CHO handover preparation, the source base station may send a handover request message to the candidate target base station 1, and receive a handover request confirmation message from the candidate target base station 1, the The CHO configuration information of the candidate target cell 1 may be included in the handover request confirmation message.
  • the source base station and the candidate target base station 2 perform CHO handover preparation
  • the source base station may send a handover request message to the candidate target base station 2, and receive a handover request confirmation message from the candidate target base station 2, the The CHO configuration information of the candidate cell 2 may be included in the handover request confirmation message.
  • the source base station may send an RRC message to the UE, where the RRC message includes the CHO configuration information corresponding to the candidate cell 1 and the candidate cell 2 respectively.
  • step S406 after the UE receives the RRC message, it can judge whether the respective CHO execution conditions of the candidate cell 1 and the candidate cell 2 are satisfied according to the CHO configuration information of the candidate cell 1 and the candidate cell 2, and assign the candidate cell 1 to the candidate cell 2.
  • the cell that satisfies the CHO execution condition in cell 1 and candidate cell 2 is taken as the target cell.
  • the UE may initiate random access to the base station to which the target cell belongs, so as to access the target cell.
  • the UE may perform a random access procedure with the candidate target base station 1 (ie, the target base station), and after the random access procedure is successful, in step S408, the UE may The target base station 1 (ie, the target base station) sends an RRC reconfiguration complete message.
  • the candidate target base station may also be referred to as a target base station.
  • FIG. 4 is only an example of the CHO process, and the CHO process may have other modifications, which are not limited in this application. The steps in FIG. 4 may be optionally performed, and the order of execution between the steps may be changed.
  • the UE may judge whether the CHO execution condition is satisfied according to the CHO configuration information.
  • the type of CHO execution event configured for candidate cell 1 is an A3 event
  • the trigger amount is the signal quality of the cell
  • the corresponding threshold is the first threshold
  • the signal quality may include one or more of RSRP, RSRQ and SINR, for example, the signal quality may include RSRP and RSRQ, or include RSRP and SINR, or include other parameters, which is not limited.
  • each of them can be considered as a separate trigger quantity, for example, when the signal quality includes RSRP and RSRQ, RSRP can be considered as one trigger quantity and RSRQ is another trigger quantity .
  • the corresponding first threshold may be the same or different, which is not limited. Specifically, for candidate cell 1, configure the A3 event and configure two trigger quantities, namely RSRP and RSRQ.
  • the configured first threshold corresponding to RSRP is E
  • the configured first threshold corresponding to RSRQ is F.
  • the candidate cell 1 When the RSRP of cell 1 is higher than the RSRP of the serving cell by E, and the RSRQ of the candidate cell 1 is higher than the RSRQ of the serving cell by F, it can be considered that the candidate cell 1 satisfies the CHO execution condition, and the candidate cell 1 can be determined as the target cell.
  • the trigger amount is the signal quality of the cell
  • the corresponding configured thresholds are the second threshold and the third threshold
  • the CHO execution event types configured for the candidate cell 1 are A3 events and A5 events
  • the trigger amount configured for the A3 event is RSRP
  • the corresponding threshold value configured for the A3 event is the first threshold
  • the trigger amount is RSRQ
  • the corresponding thresholds configured by the A5 event are the second threshold and the third threshold
  • the use of the CHO mechanism in the NTN communication system has obvious gains.
  • the network device can know the ephemeris, for example, which cell/base station serves the terminal device at a specific geographic location, or a specific segment Which cell/base station serves the terminal equipment during the time period. Therefore, the CHO mechanism in the NTN communication system can introduce a criterion for judging whether the CHO execution condition is satisfied according to the location information and time information.
  • the CHO mechanism of the NTN communication system may have the following three types of CHO execution condition information:
  • the CHO execution condition information may include a CHO execution event type and a corresponding threshold value.
  • a CHO execution event type For details, please refer to the relevant introduction about the CHO execution condition information above.
  • the CHO execution condition information may be geographic location information.
  • the geographic location information may be the geographic location information of the terminal device on the ground.
  • the CHO execution condition information may include longitude and latitude values, which may be used to determine a certain area or a certain fixed point. , when the geographic location of the terminal device satisfies the longitude and latitude requirements, for example, when the terminal device moves to the area indicated by the longitude and latitude value or to a fixed point position, the terminal device can perform handover.
  • the geographic location information can be the distance between the terminal device and the satellite, for example, the CHO execution condition information can include the distance threshold value, when the distance between the terminal device and the satellite reaches the threshold value , the UE can perform handover.
  • the geographic location information may be global positioning system (GPS) information or timing advance (TA) or other information
  • GPS global positioning system
  • TA timing advance
  • a candidate cell may be Corresponding to one or more CHO execution condition information, and the candidate cell has corresponding relevant information (ie, relevant information of the candidate cell), and the CHO execution condition information corresponding to different candidate cells may be the same or different, which is not limited.
  • the CHO execution condition information may be time information.
  • the CHO execution condition information may be an absolute time value, such as a value at a specific moment (such as 12:00 in Coordinated Universal Time (UTC)) or a value in a specific time period. (such as UTC 12:00-UTC13:00)), that is, when the absolute time arrives, the terminal device can perform handover.
  • the CHO execution condition information may be a relative time value, such as the valid duration of the timer, that is, after the terminal device receives the RRC message containing the CHO configuration information, it starts the timer, and when the timer is valid When the time period expires, the terminal device can perform handover.
  • one candidate cell may correspond to one or more pieces of CHO execution condition information, and the candidate cell has corresponding relevant information (that is, relevant information of the candidate cell), and the CHO execution condition information corresponding to different candidate cells may be the same or different.
  • CHO execution condition information may be configured as CHO execution condition information.
  • the CHO execution event type, the corresponding threshold value, and the absolute time value can be configured as CHO execution condition information, then when the absolute time arrives and the signal quality of the corresponding candidate cell satisfies the condition, the terminal device can use the candidate cell Determine the target cell and perform handover.
  • the terminal device and/or the network device may perform some or all of the steps in the embodiments of the present application, these steps or operations are only examples, and the embodiments of the present application may also perform other operations or various operations deformation.
  • various steps may be performed in different orders presented in the embodiments of the present application, and it may not be necessary to perform all the operations in the embodiments of the present application.
  • FIG. 5 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the method includes:
  • Step S501 terminal equipment receives N CHO configuration information from source network equipment, each CHO configuration information indicates the CHO execution condition of the candidate cell corresponding to this CHO configuration information, and the CHO execution condition is based on location information and/or time information and/or the CHO execution condition of the signal quality information, N is an integer greater than 1.
  • the source network device may configure one or more candidate cells for the terminal device, and may provide the terminal device with one or more CHO configuration information corresponding to each candidate cell.
  • a candidate cell is a cell covering a geographic area of a country or a service area of an operator, or if a candidate cell is a cell supporting one or more public land mobile networks (PLMN) and/or or an AMF cell
  • PLMN public land mobile networks
  • the candidate cell may correspond to one CHO configuration information.
  • a candidate cell is a cell covering the geographic areas of multiple countries or service areas of multiple operators, or if a candidate cell is a cell supporting multiple PLMNs and/or AMFs, the candidate cell may correspond to multiple CHO configuration information, further, different PLMNs and/or AMFs in the candidate cell may correspond to different CHO configuration information. It can be known from this that if the terminal device receives N CHO configuration information from the source network device, the number M of candidate cells configured by the source network device for the terminal device may be less than or equal to N, where M is a positive integer.
  • each CHO configuration information in the N pieces of CHO configuration information may include CHO execution condition information, where the CHO execution condition information is used to indicate the CHO execution condition of the corresponding candidate cell.
  • the CHO execution condition specifically refers to a CHO execution condition based on location information and/or time information and/or signal quality information, that is, the CHO execution condition information may include location information, time information or One or more of the signal quality information.
  • the source network device may send the N pieces of CHO configuration information to the terminal device through one or more RRC messages, which is not limited.
  • Step S502 Before the CHO execution condition indicated by any CHO configuration information in the N pieces of CHO configuration information is satisfied, the terminal device experiences a radio link failure (RLF) in the source cell.
  • RLF radio link failure
  • the CHO execution condition if the CHO execution condition is satisfied, it can also be understood that the CHO execution condition is triggered. If the CHO condition of a candidate cell is triggered, it means that the candidate cell will be determined as the target cell, and the terminal device can try to access the candidate cell.
  • the step S502 may also mean that, according to the N pieces of CHO configuration information, the terminal device generates RLF in the source cell before determining the target cell from the candidate cells corresponding to the N pieces of CHO configuration information. It can be understood that, before the target cell is determined from the candidate cells corresponding to the N CHO configuration information, none of the CHO execution conditions indicated by the CHO configuration information in the N CHO configuration information has been triggered, or there is no CHO execution condition indicated by the N CHO configuration information. A CHO execution condition for a candidate cell is triggered.
  • Step S503 the terminal device determines the first cell to be accessed according to the N CHO configuration information, the current location and/or the current time and/or the current signal quality of the terminal device.
  • the current location of the terminal device may refer to the location of the terminal device when RLF occurs in the source cell, and the current location of the terminal device may be a geographic location, such as longitude and latitude, or a relative position, such as the terminal device and the The distance between satellites is not limited.
  • the current time may refer to the time when the terminal equipment generates RLF in the source cell.
  • the current signal quality may refer to the signal quality of each candidate cell, the source cell and one or more cells among other cells when RLF occurs in the source cell.
  • the terminal device may determine that the first cell is the first cell that matches. A first candidate cell corresponding to the CHO configuration information. Furthermore, the terminal device can access the first cell according to the first CHO configuration information.
  • the terminal device can obtain the matching information from the plurality of CHO configuration information One candidate cell is selected as the first cell among the corresponding candidate cells, and then the first cell is accessed according to the corresponding CHO configuration information. It should be noted that in this case, which candidate cell the terminal device selects as the first cell, or which candidate cell the terminal device selects to access, can be implemented based on the terminal device, which is not limited in this application.
  • the terminal device may determine the first CHO configuration information from the plurality of CHO configuration information according to the signal quality of the candidate cells corresponding to the plurality of CHO configuration information, the first CHO configuration information corresponding to the first CHO configuration information.
  • the candidate cell may be a candidate cell with the best signal quality among the candidate cells corresponding to the N CHO configuration information, and the signal quality may include one or more of RSRP, RSRQ, SINR, and may also include other parameters , not limited.
  • the first CHO configuration information may include relevant information of the first candidate cell, and the terminal device may use the relevant information of the first candidate cell to access the first candidate cell.
  • relevant information about the candidate cell For the specific content of the relevant information about the candidate cell, reference may be made to the above description, and details are not repeated here.
  • the terminal device may determine that the first cell is not a candidate cell.
  • the terminal device may determine other cells other than the candidate cells corresponding to the N CHO configuration information as the first cell, and perform re-establishment in the first cell.
  • the first cell may also be a source cell, or may be another cell except the source cell and the candidate cell, which is not limited.
  • the current location and/or current time and/or current signal quality of the terminal device match one or more CHO configuration information in the N pieces of CHO configuration information. It is understood that the current location and/or the current time and/or the current signal quality of the terminal device conform to one or more CHO configuration information in the N pieces of CHO configuration information.
  • the matching of the current location of the terminal device with a certain CHO configuration information may specifically mean that the current location of the terminal device is within the cell range of the candidate cell corresponding to the CHO configuration information.
  • the CHO execution condition information in the CHO configuration information may include location information, where the location information is used to indicate the cell range of the candidate cell corresponding to the CHO configuration information.
  • the location information can be area information, which is used to indicate a geographic area on the ground, for example, represented by latitude and longitude values and a radius. In this way, if the current location of the terminal device is within the range of the geographic area indicated by the area information, it can indicate that the terminal The current location of the device matches the CHO configuration information.
  • the location information can also be distance information, which is used to indicate the interval range or threshold value of the distance between the terminal device and the satellite.
  • the current distance between the terminal device and the satellite is within the distance indicated by the distance information Within the range, or when the threshold value of the distance indicated by the distance information is reached, it may indicate that the current position of the terminal device matches the CHO configuration information. It can be understood that the fact that the current location of the terminal device does not match a certain CHO configuration information means that the current location of the terminal device is not within the cell range of the candidate cell corresponding to the CHO configuration information.
  • the matching of the current time with a certain CHO configuration information may specifically mean that the current time is within the time range of the candidate cell corresponding to the CHO configuration information.
  • the CHO execution condition is a time-based CHO execution condition
  • the CHO execution condition information in the CHO configuration information may include time information, where the time information is used to indicate the time range of the candidate cell corresponding to the CHO configuration information.
  • the time information can be time period information or time interval information. For example, it can be represented by the specific time values of the start time and end time of the time period. In this way, if the current time is within the time range indicated by the time period information, It can indicate that the current time matches the CHO configuration information.
  • the time information can also be timer information, which is represented by, for example, the effective duration of the timer.
  • the timer is started when the terminal device receives the CHO configuration information. In this way, if the timer indicated by the time information is at the current time Triggered, that is, when the valid duration is reached, it can be considered that the current time matches the CHO configuration information.
  • Matching the current signal quality with a certain CHO configuration information may specifically mean that the current signal quality is within the cell signal quality range corresponding to the CHO configuration information.
  • the CHO execution condition is a CHO execution condition based on signal quality
  • the CHO execution condition information in the CHO configuration information may include signal quality information, and the signal quality information is used to indicate the candidate cell corresponding to the CHO configuration information.
  • Signal quality range For example, the signal quality information may indicate a signal quality threshold. If the current signal quality of the terminal device is greater than the signal quality threshold indicated by the signal quality information, it may indicate that the current signal quality matches the CHO configuration information.
  • the terminal device when judging whether it matches a certain CHO configuration information, can It is judged whether the location of the CHO matches the location information in the CHO configuration information, whether the current time matches the time information in the CHO configuration information, and whether the current signal quality matches the signal quality in the CHO configuration information.
  • the embodiments of the present application do not specifically limit the order of judgment among the current location, current time, and current signal quality of the terminal device.
  • the CHO execution condition is the CHO execution condition based on location information and time information
  • the current position of the terminal device matches the position information in the CHO configuration information
  • the current If the time matches the time information in the CHO configuration information it can be considered that the terminal device matches the CHO configuration information.
  • the terminal device needs to determine which parameters are consistent with the CHO execution condition information, and the relationship between different parameters (ie, the current location of the terminal device and the current time) is yes and no. It can be understood that since the CHO execution condition is based on location information and time information, it is necessary to judge whether the current location and current time of the terminal device match the CHO configuration information.
  • the CHO execution condition is the CHO execution condition based on location information and signal quality information, or the CHO execution condition information based on time information and signal quality information, or the CHO execution condition based on location information, time information and signal quality information .
  • the terminal device is configured with the CHO configuration. information to match. In this embodiment, it means that the terminal device needs to determine which parameters are consistent with the CHO execution condition information, but there is an OR relationship between different parameters (ie, the current location of the terminal device and the current time).
  • the terminal device before the terminal device satisfies the CHO execution condition indicated by any CHO configuration information in the N CHO configuration information, or the terminal device determines according to the N CHO configuration information Before the target cell to be handed over, and when a radio link failure occurs in the source cell, the terminal device can select the N CHO configuration information, the current location and/or the current time and/or the signal quality information of the terminal device according to the The cell to be accessed, the cell to be accessed may also be understood as a cell to restore the connection, or a cell to be re-established.
  • the terminal device may select the configuration information configured by the source network device for it. Access to a certain candidate cell. Specifically, the terminal device can select a first candidate cell corresponding to the first CHO configuration information in the one or more CHO configuration information that matches it as the first cell, and according to the first candidate cell in the first CHO configuration information related information, such as the C-RNTI allocated by the first candidate cell to the terminal device, the RACH resource information required to access the first candidate cell, etc., to access the first candidate cell.
  • the terminal device may select other cells to access instead of the candidate configured for it by the source network device community. That is, in this situation, the terminal device may determine other cells (ie, non-candidate cells) as the first cell to be accessed, and perform re-establishment in the first cell.
  • the CHO execution condition is a CHO execution condition based on location information and/or time information and/or signal quality information, when the terminal device is in the source cell before the CHO execution condition is satisfied CHO failure handling mechanism when wireless link failure occurs.
  • the terminal device can determine the cell to restore the connection according to the location, time, signal quality and CHO configuration information when the wireless link failure occurs, so that the terminal device can perform reasonable processing after the wireless link failure occurs, reducing the risk of radio link failure.
  • the resulting interruption delay improves system performance.
  • the source network device may provide the terminal device with three pieces of CHO configuration information, which are CHO configuration information A, CHO configuration information B, and CHO configuration information C, respectively.
  • the CHO configuration information A includes area information A and related information A, where the area information A is used to indicate the CHO execution condition of the candidate cell A corresponding to the CHO configuration information A.
  • the area information A may be ⁇ ( Longitude value 1, latitude value 1), radius 1 or diameter 1 ⁇ , indicating that when the location of the terminal device is within the cell range of the candidate cell A identified by ⁇ (longitude value 1, latitude value 1), radius 1 or diameter 1 ⁇
  • the relevant information A is used to indicate the relevant information of the candidate cell A corresponding to the CHO configuration information A, such as the C-RNTI allocated by the candidate cell A for the terminal equipment, and the RACH required to access the candidate cell A. resource information, etc.
  • the CHO configuration information B includes area information B and related information B, wherein the area information B is used to indicate the CHO execution condition of the candidate cell B corresponding to the CHO configuration information B.
  • the area information B may be ⁇ (longitude value 2, Latitude value 2), radius 2 or diameter 2 ⁇ , indicating the corresponding CHO when the location of the terminal device is within the cell range of the candidate cell B identified by ⁇ (longitude value 2, latitude value 2), radius 2 or diameter 2 ⁇ If the execution condition is satisfied, the related information B is used to indicate the related information of the candidate cell B corresponding to the CHO configuration information B.
  • the CHO configuration information C includes area information C and related information C, wherein the area information C is used to indicate the CHO execution condition of the candidate cell C corresponding to the CHO configuration information C, and the area information C can be expressed as ⁇ (longitude value 3, Latitude value 3), radius 3 or diameter 3 ⁇ , indicating the corresponding CHO when the location of the terminal device is within the cell range of the candidate cell C identified by ⁇ (longitude value 3, latitude value 3), radius 3 or diameter 3 ⁇ If the execution condition is satisfied, the related information C is used to indicate the related information of the candidate cell C corresponding to the CHO configuration information C.
  • the terminal equipment After the terminal equipment receives the above-mentioned CHO configuration information A, CHO configuration information B and CHO configuration information C, if RLF occurs in the source cell before each CHO execution condition is satisfied, in this case, if the terminal equipment is located in the Within the cell range of the candidate cell B indicated by the area information B, the terminal device can use the relevant information B to access the candidate cell B. If the terminal device is not within the cell range of the candidate cell A indicated by the area information A, the cell range of the candidate cell B indicated by the area information B, or the cell range of the candidate cell C indicated by the area information C, then The terminal equipment can be re-established in other cells.
  • the terminal device may also record information related to the connection failure, generate a first report, and report the first report to the first network device.
  • This first report may include one or more of the following information:
  • failedPcellID cell information of the cell where the connection failed, or cell information of the cell where the terminal device detects the RLF.
  • the cell information may include cell global identifier (cell global identifier, CGI), and/or physical cell identifier (physical cell identifier, PCI) and frequency point information.
  • the CGI may include PLMN ID and cell ID.
  • the cell information may further include at least one of a tracking area code (tracking area code, TAC) and a RAN area code (RAN area code, RANAC), which will not be described in detail below.
  • connectionFailureType connection failure type, such as RLF.
  • previousPCellId cell information of the source cell.
  • the terminal device restores the cell information of the connection, or the cell information of the cell to which the terminal device accesses after the RLF occurs in the source cell.
  • timeconnFailure the time information when RLF occurs in the source cell, that is, the time when RLF occurs in the source cell, which may also be referred to as the connection failure time.
  • it can be an absolute time value (such as UTC) when RLF occurs in the source cell, or it can be a relative time value (such as the time period from when the terminal device receives the RRC reconfiguration message last to when RLF occurs in the source cell).
  • the time period information of the first report is reported from the occurrence of RLF in the source cell, and/or the connection of the terminal equipment is restored to the time period information of the first report reported.
  • the location information of the terminal equipment when RLF occurs in the source cell can be the absolute position of the terminal device (such as longitude and latitude values), or it can be the relative position of the terminal device (such as the distance between the terminal device and the satellite), which is not limited.
  • the signal quality of the source cell and/or each candidate cell For example, when the terminal device receives the CHO configuration information, when RLF occurs in the source cell, when the connection of the terminal device is restored, when the terminal device reports the first report, etc., one of multiple time nodes or the source cell of the time node and/or The respective signal quality of each candidate cell.
  • the signal quality may include cell signal quality and/or the signal quality of at least one beam belonging to the cell, and the signal quality may include one or more of RSRP, RSRQ, SINR, or may be based on SSB and/or
  • the measurement result obtained by the radio resource management (RRM) measurement of the channel state information reference signal (channel state information-reference signal, CSI-RS) will not be described in detail below.
  • RRM radio resource management
  • the first network device may be the network device to which the source cell belongs (ie the source network device), the network device to which the candidate cell belongs (ie the candidate target network device), or the cell to which the connection is restored. Or the network device to which the re-established cell belongs (that is, the network device to which the first cell belongs), or other network devices, such as network elements of the core network, which are not limited.
  • the process of the terminal device reporting the first report to the first network device may be as shown in FIG. 6 .
  • the terminal device may send first indication information to the first network device, where the first indication information indicates that the terminal device has recorded the first report, and the first report includes relevant information about the connection failure, or the first report An indication information can also be understood as being used to instruct the terminal device to record/save relevant information about the connection failure.
  • the information related to the connection failure may specifically be one or more kinds of information included in the first report listed above.
  • the first network device may send a first request message to the terminal device, where the first request message is used to request the terminal device to report the first report.
  • the first request message may be a user information request (UEinformationRequest) message.
  • the terminal device sends a first response message to the first network device, the first response message includes the first report, and this step S603 can also be understood as the terminal device sending its recorded data to the first network device Information about connection failures.
  • the first response message may be a user information response (UEinformationResponse) message, and the user information response message includes the connection failure related information recorded by the terminal device.
  • the first network device may also send part or all of the information in the first report to the source network device. Further, after receiving part or all of the information in the first report, the source network device may adjust the corresponding handover parameters according to part or all of the received information in the first report.
  • the source network device may also send part or all of the received information in the first report to the candidate target network device or the re-establishment network device, and then the candidate target network device or the re-establishment network device receives the information. After the information is received, the corresponding switching parameters can be adjusted according to the received information.
  • the number of candidate target network devices may be one or more, which is not limited.
  • the first network device may also send part or all of the information in the first report to the candidate target network device. Further, after receiving part or all of the information in the first report, the candidate target network device may adjust the corresponding handover parameters according to part or all of the received information in the first report.
  • the candidate target network device may also send part or all of some or all of the information in the received first report to the source network device or the re-establishment network device, and then the source network device or the re-establishment network device receives the information. After the information is received, the corresponding switching parameters can be adjusted according to the received information.
  • FIG. 7 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • the method includes:
  • Step S701 terminal equipment receives N CHO configuration information from source network equipment, each CHO configuration information indicates the CHO execution condition of the candidate cell corresponding to the CHO configuration information, and the CHO execution condition is based on location information and/or time information and/or the CHO execution condition of the signal quality information, N is an integer greater than 1.
  • the CHO execution condition specifically refers to a CHO execution condition based on location information and/or time information and/or signal quality information.
  • Step S702 After the CHO execution condition indicated by the second CHO configuration information in the N pieces of CHO configuration information is satisfied, the terminal device performs handover to the second candidate cell corresponding to the second CHO configuration information.
  • Step S703 if an access or handover failure (handover failure, HOF) occurs in the second candidate cell, the terminal device is based on the N CHO configuration information, the current location of the terminal device and/or the current time and/or the current Signal quality to determine the first cell to be accessed.
  • handover failure handover failure, HOF
  • step S702 if the CHO execution condition indicated by the second CHO configuration information is triggered, it means that the terminal device determines the second candidate cell as the target cell, performs a corresponding handover process, and attempts to access the second candidate cell. candidate cell.
  • the access or handover failure of the terminal device in the second candidate cell described in step S503 may mean that, according to the N pieces of CHO configuration information, the terminal device selects the candidate cells corresponding to the N pieces of CHO configuration information from the candidate After the target cell is determined in the cell, an access failure or a handover failure occurs in the target cell, or the terminal device fails to access or switch to the determined target cell successfully.
  • the current location of the terminal device may refer to the location of the terminal device when an access or handover failure occurs in the second candidate cell, and the current location of the terminal device may be a geographic location, such as a latitude and longitude value, or a relative The location, such as the distance between the terminal device and the satellite, is not limited.
  • the current time may refer to the time when the terminal device and the second candidate cell fail to access or fail to handover.
  • the current signal quality may refer to the signal quality of each candidate cell, the source cell, and one or more cells among other cells when an access failure or a handover failure occurs in the second candidate cell.
  • the terminal device may determine that the first cell is the first cell that matches. A first candidate cell corresponding to the CHO configuration information, and the terminal device can access the first cell according to the first CHO configuration information.
  • the terminal device can obtain the matching information from the plurality of CHO configuration information One candidate cell is selected as the first cell among the corresponding candidate cells, and then the first cell is accessed according to the corresponding CHO configuration information. It should be noted that in this case, which candidate cell the terminal device selects as the first cell, or which candidate cell the terminal device selects to access, can be implemented based on the terminal device, which is not limited in this application.
  • the terminal device may determine the first CHO configuration information from the plurality of CHO configuration information according to the signal quality of the candidate cells corresponding to the plurality of CHO configuration information, the first CHO configuration information corresponding to the first CHO configuration information.
  • the candidate cell may be a candidate cell with the best signal quality among the candidate cells corresponding to the N CHO configuration information, and the signal quality may be one or more of RSRP, RSRQ, SINR, or may include other parameters, Not limited.
  • the first CHO configuration information may include relevant information of the first candidate cell, and the terminal device may use the relevant information of the first candidate cell to access the first candidate cell.
  • relevant information about the candidate cell For the specific content of the relevant information about the candidate cell, reference may be made to the above description, and details are not repeated here.
  • the terminal device may determine the first A cell is the source cell, and then re-establishment is performed in the source cell, that is, the terminal equipment can fall back to the source cell in this situation.
  • the terminal device may determine The first cell is neither a candidate cell nor a source cell.
  • the terminal device may determine the candidate cells corresponding to the N CHO configuration information and other cells other than the source cell as the first cell, and perform re-establishment in the first cell.
  • the second candidate cell corresponding to the second CHO configuration information After the CHO execution condition indicated by the second CHO configuration information in the N pieces of CHO configuration information is satisfied, the second candidate cell corresponding to the second CHO configuration information When an access failure or a handover failure occurs, or when the terminal device determines the target cell according to the N CHO configuration information, but when an access failure or a handover failure occurs in the target cell, the terminal device can determine the target cell according to the N CHO configuration information.
  • CHO configuration information, the current location and/or current time and/or current signal quality of the terminal equipment, to select the cell to be accessed, the cell to be accessed can also be understood as the cell to restore the connection, or the cell to be re-established Wait.
  • the terminal device may select the configuration information configured by the source network device for it. Access to a certain candidate cell. Specifically, the terminal device can select a first candidate cell corresponding to the first CHO configuration information in the one or more CHO configuration information that matches it as the first cell, and according to the first candidate cell in the first CHO configuration information related information, such as the C-RNTI allocated by the first candidate cell to the terminal device, the RACH resource information required to access the first candidate cell, etc., to access the first candidate cell.
  • the present application does not specifically limit the manner of selecting the first CHO configuration information or the first candidate cell.
  • the terminal device can roll back Go to the source cell, and perform re-establishment in the source cell. That is to say, in this situation, the first cell is the source cell, and the terminal device can select to access the source cell.
  • the terminal device can determine other cells (ie, non-candidate cells, non-source cells) as the first cell to be accessed, and perform re-establishment in the first cell.
  • the CHO execution condition is a CHO execution condition based on location information and/or time information and/or signal quality information, when the terminal device is in the candidate state after the CHO execution condition is satisfied CHO failure handling mechanism when access or handover failure occurs in the cell.
  • the terminal device can determine the cell to be accessed according to the location, time, signal quality and CHO configuration information when the access or handover failure occurs, so that the terminal device can perform reasonable processing after the access or handover failure, and reduce the number of problems caused by access. Or the interruption and delay caused by the switching failure, improve the system performance.
  • the source network device may provide the terminal device with three pieces of CHO configuration information, which are CHO configuration information A, CHO configuration information B, and CHO configuration information C, respectively.
  • the CHO configuration information A includes time period information A and related information A, where the time period information A is used to indicate the CHO execution condition of the candidate cell A corresponding to the CHO configuration information A.
  • the time period information A may be It is ⁇ UTC time1, UTC time2 ⁇ , indicating that when the time reaches ⁇ UTC time1, UTC time2 ⁇ , the CHO execution condition of candidate cell A is satisfied; the relevant information A is used to indicate the relevant information of the candidate cell A corresponding to the CHO configuration information A , such as the C-RNTI allocated by the candidate cell A to the terminal device, the RACH resource information required to access the candidate cell A, and the like.
  • the CHO configuration information B includes time period information B and related information B, wherein the time period information B is used to indicate the CHO execution condition of the candidate cell B corresponding to the CHO configuration information B.
  • the time period information B may be ⁇ UTC time3, UTC time4 ⁇ , indicating that when the time reaches ⁇ UTC time3, UTC time4 ⁇ , the CHO execution condition of the candidate cell B is satisfied; the relevant information B is used to indicate the relevant information of the candidate cell B corresponding to the CHO configuration information B.
  • the CHO configuration information C includes time period information C and related information C, wherein the time period information C is used to indicate the CHO execution condition of the candidate cell C corresponding to the CHO configuration information C, for example, the time period information C may be ⁇ UTC time5, UTC time6 ⁇ , indicating that when the time reaches ⁇ UTC time5, UTC time6 ⁇ , the CHO execution condition of the candidate cell C is satisfied; the relevant information C is used to indicate the relevant information of the candidate cell C corresponding to the CHO configuration information C.
  • the terminal device After the terminal device receives the above-mentioned CHO configuration information A, CHO configuration information B and CHO configuration information C, when the time reaches ⁇ UTC time1, UTC time2 ⁇ , the CHO execution condition of the candidate cell A is satisfied, and the terminal device can execute the Handover of candidate cell A. If the terminal device fails to access or handover in the candidate cell A, further if the terminal device is located within the cell range of the candidate cell B at this time, the terminal device can use the relevant information B to access the candidate cell B. If the terminal device is not within the cell range of candidate cell A, nor within the cell range of candidate cell B, nor within the cell range of candidate cell C, but is within the cell range of the source cell, the terminal device can fall back to source cell. If the terminal device is not within the cell range of candidate cell A, the cell range of candidate cell B, the cell range of candidate cell C, and the cell range of the source cell at this time, the terminal device can be in other The cell is re-established.
  • the source network device may provide the terminal device with three pieces of CHO configuration information, which are CHO configuration information E, CHO configuration information F, and CHO configuration information G, respectively.
  • the CHO configuration information E includes timer information E and related information E, where the timer information E is used to indicate the CHO execution condition of the candidate cell E corresponding to the CHO configuration information E, for example, the timer information E may be a timing The valid duration of timer E (ie timer1) indicates that when the valid duration of timer E arrives, timer E is triggered, the CHO execution condition of candidate cell E is satisfied, and the terminal equipment can try to access the candidate cell E; related information E is used to indicate the relevant information of the candidate cell E corresponding to the CHO configuration information E, such as the C-RNTI allocated by the candidate cell E to the terminal equipment, the RACH resource information required to access the candidate cell E, and the like.
  • the CHO configuration information F includes timer information F and related information F, where the timer information F is used to indicate the CHO execution condition of the candidate cell F corresponding to the CHO configuration information F.
  • the timer information F may be a timer
  • the valid duration of F(timer2) indicates that when the valid duration of timer F arrives, timer F is triggered, the CHO execution condition of candidate cell F is satisfied, and the terminal equipment can try to access the candidate cell F; the relevant information F is used for Indicates the relevant information of the candidate cell F corresponding to the CHO configuration information F.
  • the CHO configuration information G includes timer information G and related information G, where the timer information G is used to indicate the CHO execution condition of the candidate cell G corresponding to the CHO configuration information G.
  • the timer information G may be a timer
  • the valid duration of G indicates that when the valid duration of timer G arrives, timer G is triggered, the CHO execution condition of candidate cell G is satisfied, and the terminal device can try to access the candidate cell G; It is used to indicate the relevant information of the candidate cell G corresponding to the CHO configuration information G.
  • the terminal device can start the timer E, the timer F, and the timer G.
  • the valid duration of the timer E arrives, the CHO execution condition of the candidate cell E is satisfied, and the terminal device can perform handover to the candidate cell E.
  • the terminal equipment fails to access or handover in the candidate cell E, further if the terminal equipment is located within the cell range of the candidate cell F at this time, the terminal equipment can use the relevant information F to access the candidate cell F. If the terminal device is not within the cell range of candidate cell E, neither within the cell range of candidate cell F nor within the cell range of candidate cell G, but within the cell range of the source cell, the terminal device can fall back to source cell. If the terminal device is not within the cell range of the candidate cell E, the cell range of the candidate cell F, the cell range of the candidate cell G, and the cell range of the source cell at this time, the terminal device can be in other The cell is re-established.
  • the terminal device may also record information about the connection failure, generate a second report, and report the second report to the first network device.
  • This second report may include one or more of the following information:
  • failedPcellID the cell information of the failed cell, or the cell information of the cell where the terminal device fails to access or handover, that is, the cell information of the second candidate cell.
  • connectionFailureType connection failure type, such as HOF or conditional handover failure (CHOF).
  • previousPCellId cell information of the source cell.
  • the cell information of the connection recovery after the access failure that is, the cell information of the first cell accessed by the terminal device after the access or handover failure occurs in the second candidate cell.
  • the information may be timer information of the second candidate cell, that is, the valid duration of the timer corresponding to the second candidate cell.
  • the handover trigger to the time period information of the access failure.
  • Time information when the access fails such as the absolute time value (such as UTC time) when the access fails.
  • the location information of the terminal device when the access fails can be the absolute position of the terminal device (such as latitude and longitude values), or it can be the relative position of the terminal device (such as the distance between the terminal device and the satellite).
  • the signal quality of the source cell and/or each candidate cell (including the candidate cell with access failure and other candidate cells). For example, when the terminal device receives the CHO configuration information, when the access fails, when the connection is restored, when the second report is reported, etc., the source cell and/or each candidate cell of one or more time nodes among the multiple time nodes, etc. signal quality.
  • the first network device may be the network device to which the source cell belongs (ie the source network device), the network device to which the connection failure cell belongs (ie the candidate target network device), or the restored connection The cell, the re-established cell, or the network device to which the successfully accessed cell belongs (that is, the network device to which the first cell belongs), or may also be other network devices, which is not limited.
  • the terminal device may also record information about the access success, generate a fourth report, and report the fourth report to the first network device.
  • This fourth report may include one or more of the following information:
  • successfulPcellID cell information of a successfully accessed cell, or cell information of a cell to which a terminal device has successfully accessed, that is, cell information of the second candidate cell.
  • connectionSuccessType connection success type, such as CHO success.
  • previousPCellId cell information of the source cell.
  • Time information when the access is successful such as the absolute time value (such as UTC time) when the access is successful, or a relative time value (such as the time period information from receiving the CHO configuration information to the successful access).
  • the location information of the terminal device when the access is successful can be the absolute position of the terminal device (such as latitude and longitude values), or it can be the relative position of the terminal device (such as the distance between the terminal device and the satellite).
  • the first network device may be the network device to which the source cell belongs (that is, the source network device), the network device to which the access successful cell belongs (that is, the target network device), or other Network equipment, not limited.
  • the first network device may also send part or all of the information in the fourth report to the source network device. Further, after receiving part or all of the information in the fourth report, the source network device may adjust the corresponding handover parameters according to part or all of the received information in the fourth report. Optionally, the source network device may also send part or all of the received information in the fourth report to the target network device, and then the target network device may, after receiving the information, carry out processing according to the received information. Adjustment of the corresponding switching parameters.
  • the first network device may also send part or all of the information in the fourth report to the target network device. Further, after receiving part or all of the information in the fourth report, the target network device may adjust the corresponding handover parameters according to part or all of the received information in the fourth report.
  • the target network device may also send part or all of the received information in the fourth report to the source network device, and after receiving the information, the source network device may perform corresponding actions according to the received information. Toggle parameter adjustment.
  • FIG. 8 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • the method includes:
  • Step S801 terminal equipment receives N CHO configuration information from source network equipment, wherein, each CHO configuration information indicates the CHO execution condition of the candidate cell corresponding to the CHO configuration information, and the CHO execution condition is based on location information and/or CHO execution condition for time information and/or signal quality, N is an integer greater than 1.
  • the CHO execution condition specifically refers to a CHO execution condition based on location information and/or time information and/or signal quality information.
  • Step S802 Before the CHO execution condition indicated by any CHO configuration information in the N pieces of CHO configuration information is satisfied, the terminal device receives a first message from the source network device, where the first message instructs the terminal device to perform traditional handover.
  • the source network device may maintain the RRC connection or data transmission with the terminal device until the terminal device determines from the candidate cells corresponding to the N CHO configuration information according to the N CHO configuration information The target cell, or until the terminal device successfully accesses/handovers to the target cell, where the target cell refers to a candidate cell that satisfies the corresponding CHO execution condition.
  • the source network device may subsequently send another RRC message to the terminal device, that is, the first message in step S802, the first message is used for Instructs the end device to perform a legacy handover.
  • the first message may be a conventional handover message, or a handover command message, or an RRC reconfiguration message, or have other names, which are not limited.
  • the first message may also indicate a target cell to be handed over by the terminal device.
  • the terminal device may stop the CHO process, for example, stop the process of trying to determine the target cell from the configured candidate cells, and execute the CHO process to the target cell indicated in the first message according to the first message.
  • the legacy handover may also be called a handover, a common handover, a general handover, etc., or have other names, which are not limited.
  • Step S803 If the performed traditional handover fails, the terminal device determines the first cell to be accessed according to the N CHO configuration information, the current location and/or the current time and/or the current signal quality of the terminal device.
  • the current location of the terminal device may refer to the location of the terminal device when the traditional handover performed by the terminal device fails, or the location of the terminal device when access or handover failure occurs in the target cell of the traditional handover, the current location of the terminal device It can be a geographic location, such as longitude and latitude, or a relative position, such as the distance between the terminal device and the satellite, which is not limited.
  • the current time may refer to the time when the conventional handover performed by the terminal device fails, or the time when the terminal device accesses or fails to handover in the target cell of the conventional handover.
  • the current signal quality may refer to the failure of the traditional handover performed by the terminal device, or when the terminal device fails to access or handover the target cell of the traditional handover, each candidate cell, the source cell and one or more cells among other cells signal quality.
  • the terminal device may determine that the first cell is the first cell that matches. A first candidate cell corresponding to the CHO configuration information, and the terminal device can access the first cell according to the first CHO configuration information.
  • the terminal device can obtain the matching information from the plurality of CHO configuration information One candidate cell is selected as the first cell among the corresponding candidate cells, and then the first cell is accessed according to the corresponding CHO configuration information. It should be noted that in this case, which candidate cell the terminal device selects as the first cell, or which candidate cell the terminal device selects to access, can be implemented based on the terminal device, which is not limited in this application.
  • the terminal device may determine the first CHO configuration information from the multiple CHO configuration information according to the signal quality of the candidate cells corresponding to the multiple CHO configuration information, and determine that the first cell is the first CHO configuration. the first candidate cell corresponding to the information, and then access the first cell according to the first CHO configuration information.
  • the first candidate cell corresponding to the first CHO configuration information may be a candidate cell with the best signal quality among the candidate cells corresponding to the N CHO configuration information, and the signal quality may be RSRP, RSRQ, SINR
  • One or more of the parameters may also contain other parameters, which are not limited.
  • the first CHO configuration information may include relevant information of the first candidate cell, and the terminal device may use the relevant information of the first candidate cell to access the first candidate cell.
  • relevant information about the candidate cell For the specific content of the relevant information about the candidate cell, reference may be made to the above description, and details are not repeated here.
  • the terminal device may determine the first A cell is the source cell, and then re-establishment is performed in the source cell, that is, the terminal equipment can fall back to the source cell in this situation.
  • the terminal device may determine The first cell is neither a candidate cell nor a source cell.
  • the terminal device may determine the candidate cells corresponding to the N CHO configuration information and other cells other than the source cell as the first cell, and perform re-establishment in the first cell.
  • the terminal device before the CHO execution conditions indicated by the N pieces of CHO configuration information are satisfied, the terminal device receives the first instruction of the traditional handover from the source network device again. message, but when the execution of the traditional handover fails, or when the access or handover failure occurs with the target cell indicated in the first message, the terminal device may, according to the N CHO configuration information, the current location of the terminal device and/or The current time and/or the current signal quality are used to select the cell to be accessed, and the cell to be accessed may also be understood as a cell to restore the connection, or a cell to be re-established.
  • the terminal device may select the configuration information configured by the source network device for it. Access to a certain candidate cell. Specifically, the terminal device can select a first candidate cell corresponding to the first CHO configuration information in the one or more CHO configuration information that matches it as the first cell, and according to the first candidate cell in the first CHO configuration information related information, such as the C-RNTI allocated by the first candidate cell to the terminal device, the RACH resource information required to access the first candidate cell, etc., to access the first candidate cell.
  • the present application does not specifically limit the manner of selecting the first CHO configuration information or the first candidate cell.
  • the terminal device can roll back Go to the source cell, and perform re-establishment in the source cell. That is to say, in this situation, the first cell is the source cell, and the terminal device can select to access the source cell.
  • the terminal device can determine other cells (ie, non-candidate cells, non-source cells) as the first cell to be accessed, and perform re-establishment in the first cell.
  • the above technical solution provides a scenario where the CHO execution condition is a CHO execution condition based on location information and/or time information and/or signal quality information, when the terminal device receives the CHO execution condition before the CHO execution condition is satisfied.
  • the CHO failure processing mechanism when the executed traditional handover fails.
  • the terminal device can determine the cell to be accessed according to the location, time, signal quality and CHO configuration information when the traditional handover fails, so that the terminal device can handle the traditional handover failure reasonably and reduce the interruption caused by the handover failure. delay and improve system performance.
  • the source network device may provide the terminal device with three pieces of CHO configuration information, which are CHO configuration information E, CHO configuration information F, and CHO configuration information G, respectively.
  • the CHO configuration information E includes timer information E and related information E, where the timer information E is used to indicate the CHO execution condition of the candidate cell E corresponding to the CHO configuration information E, for example, the timer information E may be a timing The valid duration of timer E (ie timer1) indicates that when the valid duration of timer E arrives, timer E is triggered, the CHO execution condition of candidate cell E is satisfied, and the terminal equipment can try to access the candidate cell E; related information E is used to indicate the relevant information of the candidate cell E corresponding to the CHO configuration information E, such as the C-RNTI allocated by the candidate cell E to the terminal equipment, the RACH resource information required to access the candidate cell E, and the like.
  • the CHO configuration information F includes timer information F and related information F, where the timer information F is used to indicate the CHO execution condition of the candidate cell F corresponding to the CHO configuration information F.
  • the timer information F may be a timer
  • the valid duration of F(timer2) indicates that when the valid duration of timer F arrives, timer F is triggered, the CHO execution condition of candidate cell F is satisfied, and the terminal equipment can try to access the candidate cell F; the relevant information F is used for Indicates the relevant information of the candidate cell F corresponding to the CHO configuration information F.
  • the CHO configuration information G includes timer information G and related information G, where the timer information G is used to indicate the CHO execution condition of the candidate cell G corresponding to the CHO configuration information G.
  • the timer information G may be a timer
  • the valid duration of G indicates that when the valid duration of timer G arrives, timer G is triggered, the CHO execution condition of candidate cell G is satisfied, and the terminal device can try to access the candidate cell G; It is used to indicate the relevant information of the candidate cell G corresponding to the CHO configuration information G.
  • the terminal device can start the timer E, the timer F, and the timer G.
  • the terminal device When the valid durations of timer E, timer F and timer G have not expired, if the terminal device receives a traditional handover message from the source network device again, instructing the terminal device to switch to another cell H, the terminal device can stop CHO procedure and perform a legacy handover to this cell H. If the conventional handover to the cell H performed by the terminal equipment fails, and further if the terminal equipment is located within the cell range of the candidate cell F at this time, the terminal equipment can use the relevant information F to access the candidate cell F. If the terminal device is not within the cell range of candidate cell E, neither within the cell range of candidate cell F nor within the cell range of candidate cell G, but within the cell range of the source cell, the terminal device can fall back to source cell. If the terminal device is not within the cell range of the candidate cell E, the cell range of the candidate cell F, the cell range of the candidate cell G, and the cell range of the source cell at this time, the terminal device can be in other The cell is re-established.
  • the terminal device may also record the relevant information of the handover failure, generate a third report, and report the third report to the first network device.
  • This third report may include one or more of the following information:
  • failedPcellID the cell information of the cell that fails to access, or the cell information of the cell where the terminal device fails to access or handover, that is, the cell information of the target cell of the traditional handover.
  • connectionFailureType connection failure type, such as HOF.
  • previousPCellId cell information of the source cell.
  • Cell information for recovering connection after access failure that is, cell information of the first cell accessed by the terminal device after the execution of the traditional handover to the target cell fails.
  • the C-RNTI allocated by the source cell to the terminal equipment, and/or the access failure cell is the C-RNTI allocated by the terminal equipment, and the access failure cell is the target cell of the traditional handover.
  • the CHO execution condition information may include timer information and/or channel quality information.
  • the timer information specifically refers to one or more of the timer information of each candidate cell included in the N pieces of CHO configuration information, that is, the timing corresponding to each candidate cell valid duration of the device.
  • the signal quality threshold specifically refers to a threshold corresponding to the CHO execution event of each candidate cell included in the N pieces of CHO configuration information.
  • Time information when the access fails such as the absolute time value (such as UTC time) when the traditional handover fails.
  • the position information of the terminal device when the access fails for example, the absolute position (such as the latitude and longitude value) of the terminal device when the traditional handover fails, or the relative position (such as the distance between the terminal device and the satellite).
  • the source cell and/or the access failure cell ie, the target cell of the traditional handover
  • the respective signal quality of each candidate cell may be when the terminal device receives the CHO configuration information, and/or, when the first message is received, and/or, when the conventional handover is performed, and/or, when the performed conventional handover fails, and/or, the connection is restored and/or when reporting the third report, the respective signal qualities of the source cell and/or the access failure cell and/or each candidate cell.
  • the first network device may be the network device to which the source cell belongs (ie the source network device), the network device to which the connection failure cell belongs (ie the target network device of the traditional handover), or the recovery device
  • the network device to which the connected cell or the re-established cell or the successfully accessed cell belongs that is, the network device to which the first cell belongs), or other network devices, is not limited.
  • the first network device may also send part or all of the information in the third report to the source network device. Further, after receiving part or all of the information in the third report, the source network device may adjust the corresponding handover parameters according to part or all of the received information in the third report.
  • the source network device may also send part or all of the received third report to the target network device or the re-establishment network device for the traditional handover, and then the target network device or the re-establishment network device. After receiving the information, the corresponding switching parameters can be adjusted according to the received information.
  • the first network device may also send part or all of the information in the first report to the target network device. Further, after receiving part or all of the information in the first report, the target network device may adjust the corresponding handover parameters according to part or all of the received information in the first report.
  • the target network device may also send part or all of the information in the received first report to the source network device or the re-establishment network device, and then the source network device or the re-establishment network device receives the information. Afterwards, the corresponding switching parameters can be adjusted according to the received information.
  • the terminal device may also record information about the successful handover, generate a fifth report, and report the result to the first network device.
  • Fifth report may include one or more of the following information:
  • successfulPcellID cell information of a successful access cell, or cell information of a cell where a terminal device successfully accesses, that is, cell information of a target cell of a traditional handover.
  • connectionSuccessType connection success type, such as HO success.
  • previousPCellId cell information of the source cell.
  • Time information when the access is successful such as an absolute time value (such as UTC time) when the access is successful, or a relative time value (such as the time period information from when the first message is received to when the access is successful).
  • the location information of the terminal device when the access is successful can be the absolute position of the terminal device (such as latitude and longitude values), or the relative position (such as the distance between the terminal device and the satellite).
  • the first network device may be the network device to which the source cell belongs (that is, the source network device), or the network device to which the access successful cell belongs (that is, the target network device of the traditional handover), Or it can also be other network devices, which is not limited.
  • the first network device may also send part or all of the information in the fifth report to the source network device. Further, after receiving part or all of the information in the fifth report, the source network device may adjust the corresponding handover parameters according to part or all of the received information in the fifth report. Optionally, the source network device may also send part or all of the received information in the fifth report to the target network device, and then the target network device may, after receiving the information, carry out processing according to the received information. Adjustment of the corresponding switching parameters.
  • the first network device may also send part or all of the information in the fifth report to the target network device. Further, after receiving part or all of the information in the fifth report, the target network device may adjust the corresponding handover parameters according to part or all of the received information in the fifth report.
  • the target network device may also send part or all of the received information in the first report to the source network device, and after receiving the information, the source network device may perform corresponding actions according to the received information. Toggle parameter adjustment.
  • the communication methods provided by the embodiments of the present application are respectively applicable to three different scenarios of handover failure.
  • the three handover failure scenarios are: radio link failure with the source cell before the CHO execution conditions are met, access or handover failure with the candidate cell after the CHO execution conditions are met, and traditional handover messages are received before the CHO execution conditions are met. But the legacy handover performed fails.
  • part or all of the information received from the terminal device may be The information is forwarded to the source network device or the target network device or the network device to which the candidate cell belongs.
  • a directly connected communication interface eg, X2/Xn interface
  • the information can be forwarded through the core network device (eg AMF). That is, the first network device can send the RLF report or some or all of the information contained in the RLF report to the core network device through the communication interface with the core network device.
  • the core network device eg AMF
  • the first network device sends the RLF report or some or all of the information contained in the RLF report to the core network device through the S1 or NG interface, and the core network device sends the source network device or the target network device or the network device to which the candidate cell belongs. Forward the information received from the first network device.
  • the first network device can send the RLF report or part or all of the RLF report to the source network device or the target network device or the network device to which the candidate cell belongs through at least one of the following messages on the S1/NG interface Information: UPLINK RAN CONFIGURATION TRANSFER message, DOWNLINK RAN CONFIGURATION TRANSFER message, base station configuration transmission (eNB CONFIGURATION TRANSFER or gNB CONFIGURATION TRANSFER) message, core network equipment configuration transmission (MME CONFIGURATION TRANSFER or AMF CONFIGURATION TRANSFER) message or other message.
  • the target network device can send to the core network device through the interface between itself and the core network device (such as the S1 or NG interface), the target network device receives some or all of the information from the first network device, and then the core network device The network device forwards some or all of the information received from the target network device to the source network device through the S1 or NG interface.
  • the CU node as the recipient of the message/information can receive the Some or all of the information is sent to the DU node.
  • the CU node can be further divided into a control plane (CU-CP) and a user plane (CU-UP)
  • the CU-CP node serving as the message/information receiver may send some or all of the received information. The information is sent to the CU-UP node.
  • the CU node, DU node, CU-CP node, and CU-UP node may correspond to the terminal device, or the first network device, or the source network device, or the target network device, or It corresponds to the network device to which the candidate cell belongs.
  • the above-mentioned sending process between nodes may be applicable to any CHO failure scenario in the embodiments of the present application.
  • the terminal device sending the RLF report to the first network device as an example
  • the CU node of the first network device can receive the RLF report from the terminal device.
  • the CU node may also send part or all of the information included in the received RLF report to the DU node.
  • the CU-CP node may send part or all of the information included in the received RLF report to the CU-CP.
  • UP node a control plane (CU-CP) and a user plane (CU-UP).
  • FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device 900 includes a transceiver module 910 and a processing module 920 .
  • the communication apparatus may be used to implement the functions related to the terminal device in any of the foregoing method embodiments.
  • the communication device may be a terminal device, such as a handheld terminal device or a vehicle-mounted terminal device; the communication device may also be a chip or circuit included in the terminal device, or a device including the terminal device, such as various types of vehicles.
  • the transceiver module 910 is configured to receive N pieces of conditional switching CHO configuration information from the source network equipment, each of which is
  • the CHO configuration information indicates the CHO execution condition of the candidate cell corresponding to the CHO configuration information, where the CHO execution condition is a CHO execution condition based on location information and/or time information and/or signal quality information, and N is an integer greater than 1;
  • the module 920 is configured to, before the CHO execution condition indicated by any CHO configuration information in the N CHO configuration information is satisfied, a radio link failure occurs in the source cell;
  • the processing module 920 is further configured to, according to the N CHO configuration information
  • the configuration information, the current location and/or the current time and/or the current signal quality of the terminal device are used to determine the first cell to be accessed.
  • the processing module 920 is specifically configured to, if the current location and/or the current time and/or the current signal quality of the terminal device match the first CHO configuration information in the N pieces of CHO configuration information , the first cell is determined to be the first candidate cell corresponding to the first CHO configuration information, and then the first cell is accessed according to the first CHO configuration information.
  • the processing module 920 is specifically configured to, if the current location and/or the current time and/or the current signal quality of the terminal device do not match the N pieces of CHO configuration information, determine the first The cell is not a candidate cell, and further re-establishment is performed in the first cell.
  • the processing module 920 is further configured to generate a first report after a radio link failure occurs in the source cell
  • the transceiver module 910 is further configured to report the first report to the first network device; wherein, The first report includes one or more of the following information: cell information of the access failure cell, connection failure type, cell information of the source cell, information of the cell to restore the connection after a radio link failure, the source cell being the terminal
  • the C-RNTI allocated by the device the time information when the wireless link failure occurs, the time period information from the occurrence of the wireless link failure to the connection recovery, the time period information from the occurrence of the wireless link failure to reporting the first report, and the connection recovery time to reporting the first report. Time period information of a report, location information of the terminal device when a radio link failure occurs, and respective signal qualities of the source cell and/or each candidate cell.
  • the transceiver module 910 is configured to receive N pieces of condition switching CHO configuration information from the source network equipment, each CHO configuration information indicating The CHO execution condition of the candidate cell corresponding to the CHO configuration information, the CHO execution condition is a CHO execution condition based on location information and/or time information and/or signal quality, and N is an integer greater than 1; the processing module 920 is used for, After the CHO execution condition indicated by the second CHO configuration information in the N pieces of CHO configuration information is satisfied, perform handover to the second candidate cell corresponding to the second CHO configuration information; the processing module 920 is further configured to, if in the If access or handover failure occurs in the second candidate cell, the first cell to be accessed may be determined according to the N CHO configuration information, the current location and/or current time and/or the current signal quality of the terminal device.
  • the processing module 920 is specifically configured to, if the current location and/or the current time and/or the current signal quality of the terminal device match the first CHO configuration information in the N pieces of CHO configuration information , the first cell is determined to be the first candidate cell corresponding to the first CHO configuration information, and then the first cell is accessed according to the first CHO configuration information, that is, the first candidate cell.
  • the processing module 920 is specifically configured to, if the current location and/or the current time and/or the current signal quality of the terminal device do not match the N pieces of CHO configuration information, and the current If the location is within the cell range of the source cell, the first cell is determined as the source cell, and then re-establishment is performed in the source cell.
  • the processing module 920 is specifically configured to, if the current location and/or the current time and/or the current signal quality of the terminal device do not match the N pieces of CHO configuration information, and the current If the location is not within the cell range of the source cell, it is determined that the first cell is neither a candidate cell nor a source cell, and then re-establishment is performed in the determined first cell.
  • the processing module 920 is further configured to generate a second report if the terminal device fails to access or handover in the second candidate cell; the transceiver module 910 is further configured to report this to the first network device A second report, where the second report includes one or more of the following information: cell information of the cell that fails to access, information about the time period from when the second CHO configuration information is received to when the handover is triggered, and when the handover is triggered to Time period information of access failure, time period information from access failure to connection recovery, time period information from connection recovery to reporting the second report, time period information from access failure to reporting the second report, access The time information when the access fails, the location information of the terminal device when the access fails, and the respective signal qualities of the source cell and/or each candidate cell.
  • the transceiver module 910 is configured to receive N pieces of conditional switching CHO configuration information from the source network equipment, each CHO configuration information indicating The CHO execution condition of the candidate cell corresponding to the CHO configuration information, the CHO execution condition is a CHO execution condition based on location information and/or time information and/or signal quality, and N is an integer greater than 1; the transceiver module 910 is used to: Before the CHO execution condition indicated by any CHO configuration information in the N pieces of CHO configuration information is satisfied, a first message is received from the source network device, and the first message instructs to perform traditional handover; the processing module 920 is configured to, if If the performed traditional handover fails, the first cell to be accessed is determined according to the N CHO configuration information, the current location and/or the current time and/or the current signal quality of the terminal device.
  • the processing module 920 is further configured to, if the current location and/or the current time and/or the current signal quality of the terminal device match one CHO configuration information in the N pieces of CHO configuration information, Then, it is determined that the first cell is the first candidate cell corresponding to the first CHO configuration information; and then the first cell, that is, the first candidate cell, is accessed according to the first CHO configuration information.
  • the processing module 920 is further configured to, if the current location and/or the current time and/or the current signal quality of the terminal device do not match the N pieces of CHO configuration information, and the current If the location is within the cell range of the source cell, the first cell is determined as the source cell, and then re-establishment is performed in the source cell.
  • the processing module 920 is further configured to, if the current location and/or the current time and/or the current signal quality of the terminal device do not match the N pieces of CHO configuration information, and the current If the location is not within the cell range of the source cell, it is determined that the first cell is neither a candidate cell nor a source cell, and re-establishment is performed in the determined first cell.
  • the processing module 920 is further configured to generate a third report if the traditional handover performed by the terminal device fails, and the transceiver module 910 is further configured to report the third report to the first network device, wherein , the third report includes one or more of the following information: time period information from receiving the CHO configuration information to receiving the first message, time period information from receiving the first message to the failure of traditional handover, traditional handover Time period information from failure to connection recovery, time period information from connection recovery to reporting the third report, time period information from traditional handover failure to reporting the third report, time information when traditional handover failure occurs, and when traditional handover failure occurs The location information of the terminal equipment, the source cell and/or the respective signal quality of each candidate cell.
  • the processing module 920 involved in the communication apparatus may be implemented by at least one processor or a processor-related circuit component, and the transceiver module 910 may be implemented by at least one transceiver or a transceiver-related circuit component or a communication interface.
  • the operations and/or functions of each module in the communication device are respectively in order to realize the corresponding flow of the method shown in FIG. 5 , FIG. 6 , FIG. 7 or FIG. 8 , and are not repeated here for brevity.
  • the communication device may further include a storage module, which may be used to store data and/or instructions, and the transceiver module 910 and/or the processing module 920 may read the data and/or instructions in the access module, Thereby, the communication device can implement the corresponding method.
  • the memory module can be implemented, for example, by at least one memory.
  • the above-mentioned storage module, processing module, and transceiver module may exist separately, or all or part of the modules may be integrated, for example, the storage module and the processing module are integrated, or the processing module and the transceiver module are integrated.
  • FIG. 10 is another schematic structural diagram of a communication device provided in an embodiment of the present application.
  • the communication apparatus may be used to implement the functions corresponding to the terminal equipment in the above method embodiments, for example, it may be a terminal equipment or a device capable of supporting the terminal equipment to implement the corresponding functions in the above method embodiments.
  • the communication apparatus may include a processor 1001 , a communication interface 1002 and a memory 1003 .
  • the communication interface 1002 is used to communicate with other devices through a transmission medium, and the communication interface 1002 may be a transceiver or an interface circuit such as a transceiver circuit, a transceiver chip, and the like.
  • the memory 1003 is used to store program instructions and/or data, and the processor 1001 is used to execute the program instructions stored in the memory 1003, thereby implementing the methods in the above method embodiments.
  • the memory 1003 and the processor 1001 are coupled, and the coupling is an indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, used between devices, units or modules. information interaction.
  • the communication interface 1002 may be specifically configured to perform the operations of the above-mentioned transceiver module 910, and the processor 1001 may be specifically configured to perform the operations of the above-mentioned processing module 920, which will not be described herein again.
  • connection medium between the communication interface 1002 , the processor 1001 , and the memory 1003 is not limited in the embodiments of the present application.
  • the memory 1003, the processor 1001, and the communication interface 1002 are connected by a bus 1004 in FIG. 10.
  • the bus is represented by a thick line in FIG. 10, and the connection mode between other components is only for schematic illustration. , is not limited.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is used in FIG. 10, but it does not mean that there is only one bus or one type of bus.
  • the communication apparatus may specifically be a terminal device, which is used to implement the functions related to the terminal device in any of the foregoing method embodiments.
  • the terminal device is a mobile phone as an example.
  • the terminal device includes a processor, may also include a memory, and of course, may also include a radio frequency circuit, an antenna, an input and output device, and the like.
  • the processor is mainly used to process communication protocols and communication data, control terminal equipment, execute software programs, and process data of software programs.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal equipment may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.
  • FIG. 11 only one memory and processor are shown in FIG. 11 . In an actual end device product, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or a storage device or the like.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.
  • the antenna and the radio frequency circuit with a transceiver function may be regarded as a transceiver unit of the terminal device, and the processor with a processing function may be regarded as a processing unit of the terminal device.
  • the terminal device includes a transceiver unit 1110 and a processing unit 1120 .
  • the transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, or the like.
  • the processing unit may also be referred to as a processor, a processing single board, a processing module, a processing device, and the like.
  • the device for implementing the receiving function in the transceiver unit 1110 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 1110 may be regarded as a transmitting unit, that is, the transceiver unit 1110 includes a receiving unit and a transmitting unit.
  • the transceiver unit may also sometimes be referred to as a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may also sometimes be referred to as a receiver, receiver, or receiving circuit, or the like.
  • the transmitting unit may also sometimes be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.
  • transceiving unit 1110 is configured to perform the sending and receiving operations on the terminal device side in the above method embodiments
  • processing unit 1120 is configured to perform other operations on the terminal device except the transceiving operations in the above method embodiments.
  • An embodiment of the present application further provides a chip system, including: a processor, where the processor is coupled with a memory, the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor, the The chip system implements a method corresponding to a terminal device or a method corresponding to a network device (eg, a source network device or a target network device) in any of the foregoing method embodiments.
  • a processor including: a processor, where the processor is coupled with a memory, the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor, the The chip system implements a method corresponding to a terminal device or a method corresponding to a network device (eg, a source network device or a target network device) in any of the foregoing method embodiments.
  • a network device eg, a source network device or a target network device
  • the number of processors in the chip system may be one or more.
  • the processor can be implemented by hardware or by software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor implemented by reading software codes stored in memory.
  • the memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory can be a non-transitory processor, such as a read-only memory ROM, which can be integrated with the processor on the same chip, or can be provided on different chips.
  • the setting method of the processor is not particularly limited.
  • the system-on-chip may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or a system on chip (SoC), It can also be a central processing unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), or a microcontroller (microcontroller).
  • controller unit, MCU it can also be a programmable logic device (PLD) or other integrated chips.
  • each step in the above method embodiments may be implemented by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the method steps disclosed in conjunction with the embodiments of the present application may be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • Embodiments of the present application further provide a computer-readable storage medium, where computer-readable instructions are stored in the computer storage medium, and when the computer reads and executes the computer-readable instructions, the computer is made to execute any of the foregoing method embodiments method in .
  • Embodiments of the present application further provide a computer program product, which, when the computer reads and executes the computer program product, causes the computer to execute the method in any of the above method embodiments.
  • An embodiment of the present application further provides a communication system, where the communication system includes a source network device and a terminal device.
  • the communication system may further include at least one candidate target network device.
  • the communication system may further include a first network device, and the first network device may be a source network device or a target network device or a network device or other network device to which the re-established cell (ie the cell to which the connection is restored) belongs.
  • the communication system may further include core network equipment.
  • processors mentioned in the embodiments of the present application may be a CPU, other general-purpose processors, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM enhanced synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SCRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components
  • the memory storage module
  • memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk and other mediums that can store program codes.

Abstract

本申请公开了一种通信方法及装置，用于提供一种在CHO执行条件为基于位置信息和/或时间信息和/或信号质量信息的CHO执行条件的场景下的CHO失败处理机制，当终端设备在CHO执行条件满足前在源小区发生无线链路失败时，或者在CHO执行条件满足后但在候选小区发生接入或切换失败时，或者在CHO执行条件满足前，又接收到来自源网络设备指示进行传统切换的第一消息，但执行的传统切换发生失败时，终端设备可根据发生无线链路失败时的位置、时间、信号质量以及CHO配置信息确定恢复连接的小区，从而使得终端设备在发生无线链路失败后能进行合理的处理，减少由于无线链路失败造成的中断时延，提高系统性能。

Description

通信方法及装置 技术领域
本申请涉及无线通信技术领域，尤其涉及一种通信方法及装置。
背景技术
非陆地网络(non terrestrial networks，NTN)通信系统通过将接入网设备或部分接入网设备的功能部署在高空平台或者卫星等非地面设备上，为终端设备提供无缝覆盖，并且由于高空平台或卫星位于高空中，受自然灾害的影响较小，因此，NTN通信系统的可靠性较高。
为提高切换可靠性，NTN通信系统中网络可以为终端设备配置条件切换(conditional handover，CHO)，并且当CHO失败后也具有相应的失败处理机制。然而，现有技术中通常采用根据信号质量来判断CHO执行条件是否满足的准则，因此，现有的CHO失败处理机制也是基于信号质量的CHO执行条件实现的。当引入基于位置信息或时间信息的CHO执行条件后，如果终端设备发生CHO失败，此时应如何处理，目前还没有相关的解决方案。
发明内容
本申请实施例中的一种通信方法及装置，用于提供一种采用基于位置信息和/或时间信息和/或信号质量信息的CHO执行条件的场景下的CHO失败处理机制，以减少由于CHO失败造成的中断时延，提高系统性能。
第一方面，本申请实施例提供一种通信方法，该方法可由终端设备执行，也可以由配置于终端设备的部件(例如芯片或者电路)执行。
该方法可以包括：终端设备接收来自源网络设备的N个条件切换CHO配置信息，每个CHO配置信息指示该CHO配置信息对应的候选小区的CHO执行条件，所述CHO执行条件为基于位置信息和/或时间信息和/或信号质量信息的CHO执行条件，N为大于1的整数；终端设备在所述N个CHO配置信息中的任一CHO配置信息指示的CHO执行条件满足前，在源小区发生无线链路失败；终端设备根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区。
上述技术方案提供了一种在CHO执行条件为基于位置信息和/或时间信息和/或信号质量信息的CHO执行条件的场景下，当终端设备在CHO执行条件满足前在源小区发生无线链路失败时的CHO失败处理机制。终端设备可根据发生无线链路失败时的位置、时间、信号质量以及CHO配置信息确定恢复连接的小区，从而使得终端设备在发生无线链路失败后能进行合理的处理，减少由于无线链路失败造成的中断时延，提高系统性能。
在第一方面的一种可能的设计中，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息中的第一CHO配置信息相匹配，则终端设备可确定第一小区为该第一CHO配置信息对应的第一候选小区，进而按照第一CHO配置信息，接入该第一小区。
在第一方面的一种可能的设计中，如果终端设备当前的位置和/或当前时间和/或当前 的信号质量与所述N个CHO配置信息都不匹配，则终端设备可确定第一小区不是候选小区；终端设备可在该第一小区进行重建立。
在第一方面的一种可能的设计中，终端设备在源小区发生无线链路失败之后，该方法还包括：终端设备生成第一报告，并向第一网络设备上报该第一报告，其中，该第一报告中包括下列信息中的一项或多项：接入失败小区的小区信息、连接失败类型、源小区的小区信息、发生无线链路失败后恢复连接的小区信息、源小区为终端设备分配的C-RNTI、发生无线链路失败时的时间信息、发生无线链路失败到连接恢复的时间段信息、发生无线链路失败到上报第一报告的时间段信息、连接恢复到上报第一报告的时间段信息、发生无线链路失败时终端设备的位置信息、源小区和/或各个候选小区各自的信号质量。
第二方面，本申请实施例提供一种通信方法，该方法可由终端设备执行，也可以由配置于终端设备的部件(例如芯片或者电路)执行。
该方法可以包括：终端设备接收来自源网络设备的N个条件切换CHO配置信息，每个CHO配置信息指示该CHO配置信息对应的候选小区的CHO执行条件，所述CHO执行条件为基于位置信息和/或时间信息和/或信号质量的CHO执行条件，N为大于1的整数；终端设备在所述N个CHO配置信息中的第二CHO配置信息指示的CHO执行条件满足后，执行到该第二CHO配置信息对应的第二候选小区的切换；如果终端设备在该第二候选小区发生接入或切换失败，则终端设备可根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区。
上述技术方案提供了一种在CHO执行条件为基于位置信息和/或时间信息和/或信号质量信息的CHO执行条件的场景下，当终端设备在CHO执行条件满足后但在候选小区发生接入或切换失败时的CHO失败处理机制。终端设备可根据发生接入或切换失败时的位置、时间、信号质量以及CHO配置信息确定要接入的小区，从而使得终端设备在接入或切换失败后能进行合理的处理，减少由于接入或切换失败造成的中断时延，提高系统性能。
在第二方面的一种可能的设计中，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息中的第一CHO配置信息相匹配，则终端设备可确定第一小区为该第一CHO配置信息对应的第一候选小区，进而，终端设备可按照第一CHO配置信息，接入该第一小区，即第一候选小区。
在第二方面的一种可能的设计中，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，且终端设备当前的位置在源小区的小区范围内，则终端设备可确定第一小区为源小区，进而终端设备可在源小区进行重建立。
在第二方面的一种可能的设计中，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，且终端设备当前的位置不在源小区的小区范围内，则终端设备可确定第一小区不是候选小区，也不是源小区；进而，终端设备可在确定的该第一小区进行重建立。
在第二方面的一种可能的设计中，如果终端设备在第二候选小区发生接入或切换失败，该方法还包括：终端设备生成第二报告，并向第一网络设备上报该第二报告，其中，该第二报告中包括下列信息中的一项或多项：接入失败小区的小区信息、接收到所述第二CHO配置信息到切换触发的时间段信息、切换触发到接入失败的时间段信息、接入失败到连接恢复的时间段信息、连接恢复到上报所述第二报告的时间段信息、接入失败到上报所述第二报告的时间段信息、接入失败时的时间信息、接入失败时所述终端设备的位置信息、所 述源小区和/或各个候选小区各自的信号质量。
第三方面，本申请实施例提供一种通信方法，该方法可由终端设备执行，也可以由配置于终端设备的部件(例如芯片或者电路)执行。
该方法可以包括：终端设备接收来自源网络设备的N个条件切换CHO配置信息，每个CHO配置信息指示该CHO配置信息对应的候选小区的CHO执行条件，所述CHO执行条件为基于位置信息和/或时间信息和/或信号质量的CHO执行条件，N为大于1的整数；终端设备在所述N个CHO配置信息中存在任一CHO配置信息指示的CHO执行条件满足前，接收到来自源网络设备的第一消息，该第一消息指示执行传统切换；如果终端设备执行的传统切换发生失败，则终端设备可根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区。
上述技术方案提供了一种在CHO执行条件为基于位置信息和/或时间信息和/或信号质量信息的CHO执行条件的场景下，当终端设备在CHO执行条件满足前，又接收到来自源网络设备指示进行传统切换的第一消息，但执行的传统切换发生失败时的CHO失败处理机制。终端设备可根据传统切换发生失败时的位置、时间、信号质量以及CHO配置信息确定要接入的小区，从而使得终端设备在发生传统切换失败后能进行合理的处理，减少由于切换失败造成的中断时延，提高系统性能。
在第三方面的一种可能的设计中，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息中的一个CHO配置信息相匹配，则终端设备可确定第一小区为所述第一CHO配置信息对应的第一候选小区；进而，终端设备可按照该第一CHO配置信息，接入该第一小区，即第一候选小区。
在第三方面的一种可能的设计中，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，且终端设备当前的位置在源小区的小区范围内，则终端设备可确定第一小区为源小区，进而，终端设备可在源小区进行重建立。
在第三方面的一种可能的设计中，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，且终端设备当前的位置不在源小区的小区范围内，则终端设备可确定第一小区不是候选小区，也不是源小区；进而，终端设备可在确定的第一小区进行重建立。
在第三方面的一种可能的设计中，如果终端设备执行的传统切换发生失败，该方法还包括：终端设备可生成第三报告，并向第一网络设备上报该第三报告，其中，该第三报告中包括下列信息中的一项或多项：接收到CHO配置信息到接收到第一消息的时间段信息、接收到第一消息到传统切换发生失败的时间段信息、传统切换发生失败到连接恢复的时间段信息、连接恢复到上报第三报告的时间段信息、传统切换发生失败到上报第三报告的时间段信息、传统切换发生失败时的时间信息、传统切换发生失败时终端设备的位置信息、源小区和/或各个候选小区各自的信号质量。
第四方面，本申请实施例提供一种通信装置，该装置具有实现上述第一方面或第一方面的任一种可能的设计中终端设备的功能，也可以具有实现上述第二方面或第二方面的任一种可能的设计中终端设备的功能，也可以具有实现上述第三方面或第三方面的任一种可能的设计中终端设备的功能，该装置可以为终端设备，也可以为终端设备中包括的芯片。
上述通信装置的功能可以通过硬件实现，也可以通过硬件执行相应的软件实现，所述硬件或软件包括一个或多个与上述功能相对应的模块或单元或手段(means)。
在一种可能的设计中，该装置的结构中包括处理模块和收发模块，其中，处理模块被配置为支持该装置执行上述第一方面或第一方面的任一种设计中终端设备相应的功能，或者执行上述第二方面或第二方面的任一种设计中终端设备相应的功能，或者执行上述第三方面或第三方面的任一种可能的设计中终端设备相应的功能。收发模块用于支持该装置与其他通信设备之间的通信，例如该装置为终端设备时，可从源网络设备接收N个CHO配置信息。该通信装置还可以包括存储模块，存储模块与处理模块耦合，其保存有装置必要的程序指令和数据。作为一种示例，处理模块可以为处理器，通信模块可以为收发器，存储模块可以为存储器，存储器可以和处理器集成在一起，也可以和处理器分离设置。
在另一种可能的设计中，该装置的结构中包括处理器，还可以包括存储器。处理器与存储器耦合，可用于执行存储器中存储的计算机程序指令，以使装置执行上述第一方面或第一方面的任一种可能的设计中的方法，或者执行上述第二方面或第二方面的任一种可能的设计中的方法，或者执行上述第三方面或第三方面的任一种可能的设计中的方法。可选的，该装置还包括通信接口，处理器与通信接口耦合。当装置为终端设备时，该通信接口可以是收发器或输入/输出接口；当该装置为终端设备中包含的芯片时，该通信接口可以是芯片的输入/输出接口。可选的，收发器可以为收发电路，输入/输出接口可以是输入/输出电路。
第五方面，本申请实施例提供一种芯片系统，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得该芯片系统实现上述第一方面或第一方面的任一种可能的设计中的方法，或实现上述第二方面或第二方面的任一种可能的设计中的方法，或实现上述第三方面或第三方面的任一种可能的设计中的方法。
可选的，该芯片系统还包括接口电路，该接口电路用于交互代码指令至所述处理器。
可选的，该芯片系统中的处理器可以为一个或多个，该处理器可以通过硬件实现也可以通过软件实现。当通过硬件实现时，该处理器可以是逻辑电路、集成电路等。当通过软件实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现。
可选的，该芯片系统中的存储器也可以为一个或多个。该存储器可以与处理器集成在一起，也可以和处理器分离设置。示例性的，存储器可以是非瞬时性处理器，例如只读存储器ROM，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上。
第六方面，本申请实施例提供一种计算机可读存储介质，其上存储有计算机程序或指令，当该计算机程序或指令被执行时，使得计算机执行上述第一方面或第一方面的任一种可能的设计中的方法，或执行上述第二方面或第二方面的任一种可能的设计中的方法，或执行上述第三方面或第三方面的任一种可能的设计中的方法。
第七方面，本申请实施例提供一种计算机程序产品，当计算机读取并执行所述计算机程序产品时，使得计算机执行上述第一方面或第一方面的任一种可能的设计中的方法，或执行上述第二方面或第二方面的任一种可能的设计中的方法，或执行上述第三方面或第三方面的任一种可能的设计中的方法。
第八方面，本申请实施例提供一种通信系统，该通信系统包括源网络设备和终端设备。可选的，该通信系统中还可包括至少一个候选目标网络设备。可选的，该通信系统中还可以包括第一网络设备，该第一网络设备可以是源网络设备或目标网络设备或重建立小区(即恢复连接的小区)所属的网络设备或其他网络设备。可选的，该通信系统中还可以包 括核心网设备。
附图说明
图1a和图1b为本申请实施例适用的一种卫星通信系统的网络架构示意图；
图2为移动卫星形成的地面静止小区的示意图；
图3为移动卫星形成的地面移动小区的示意图；
图4为CHO机制下的切换流程示意图；
图5为本申请实施例提供的一种通信方法的流程示意图；
图6为本申请实施例中终端设备向第一网络设备上报第一报告的示意图；
图7为本申请实施例提供的另一种通信方法的流程示意图；
图8为本申请实施例提供的另一种通信方法的流程示意图；
图9为本申请实施例提供的一种通信装置的结构示意图；
图10为本申请实施例提供的一种通信装置的另一结构示意图；
图11为本申请实施例提供的一种通信装置的另一结构示意图。
具体实施方式
为了使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施例作进一步地详细描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：码分多址(code division multiple access，CDMA)系统、宽带码分多址(wideband code division multiple access，WCDMA)系统、通用分组无线业务(general packet radio service，GPRS)、LTE系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、第五代(5th generation，5G)系统或NR系统，或者应用于未来的通信系统或其它类似的通信系统等。
本申请实施例提供的技术方案可以应用于非陆地网络(NTN)通信系统，也可以应用于NTN与陆地网络(terrestrial networks，TN)混合部署的场景中。所述NTN通信系统可以包括卫星通信系统、高空平台(high altitude platform station，HAPS)通信系统或者其他非地面通信系统。
下面以NTN通信系统为卫星通信系统为例来详细说明本申请应用的网络架构。
请参考图1a，为本申请实施例适用的卫星通信系统的一种网络架构示意图，该网络架构中包括核心网设备110、无线接入网设备120、卫星130和至少一个终端设备(如图1a中所示的终端设备140)。作为一种示例，图1a中的核心网设备、无线接入网设备和终端设备位于地面，而卫星位于高空中。
其中，无线接入网设备可通过无线或有线的方式与核心网设备通信。核心网设备与无线接入网设备可以是独立的不同的物理设备，也可以是将核心网设备的功能与无线接入网设备的逻辑功能集成在同一个物理设备上，还可以是一个物理设备上集成了部分核心网设备的功能和部分的无线接入网设备的功能。应理解，本申请实施例中所提及的无线接入网设备在不同的通信系统可对应不同的设备，例如在5G系统中对应5G中的接入网设备，例如gNB或者ng-eNB，在4G系统中对应4G中的接入网设备，例如eNB或者en-gNB。
无线接入网设备与终端设备之间的通信通过卫星转发信号，即卫星可以接收无线接入网设备的信号并将信号转发至地面形成卫星小区，进而为地面上的终端设备提供服务覆盖。此时，卫星相当于一个中继节点或转发器，因此，该场景也可以称为卫星的透明转发(transparent)形式。
在透明转发形式下，卫星小区可以是地面固定的(可以记为“固定小区”)，也可以随着卫星的移动而在地面上移动(可以记为“移动小区”)。对于“固定小区”的场景，卫星小区是地面固定的，是指卫星小区在地面上的覆盖是固定的，可以是在一段时间内是固定的，也可以是永久固定的。例如，对于高轨卫星，由于卫星相对地面保持静止，其形成的卫星小区一般相对地面也是固定的。对于低轨卫星，由于卫星相对地面移动，卫星可以通过调整其天线的发射角或是其它物理参数，使得形成的卫星小区相对地面是固定的。
对于“移动小区”的场景，卫星小区随着卫星的移动而移动，即当卫星移动时，卫星小区也跟随卫星在地面上移动。通常移动小区产生的原因是因为，随着卫星的移动，卫星并不会动态地调整波束的方向，进而导致卫星生成的波束在地面上的投影跟随着卫星的移动而移动。
应注意，本申请实施例对移动小区的存在场景不作具体限定。当卫星采用透明转发形式提供服务覆盖区域时，一种可能的移动小区的存在场景可以为：卫星与原无线接入网设备建立连接，随着卫星的移动，卫星转发的原无线接入网设备下的小区跟随卫星移动一段时间，即卫星与原无线接入网设备保持一段时间的连接；在某一时刻，卫星与原无线接入网设备的连接由于距离较远、信号较弱等原因而断开，卫星连接至一个新的无线接入网设备，此后，卫星开始转发新的无线接入网设备的信号，形成新的卫星小区。可以理解，虽然卫星在不停地运行，但是由于地面的无线接入网设备的位置不变，因此，对于存在移动小区的场景，若卫星转发地面的某一无线接入网设备的信号，那么形成的该无线接入网设备下的卫星小区虽然也会随着卫星的运行，有一定范围的移动，但是该卫星小区的移动范围通常是围绕无线接入网设备的周边。
请参考图1b，为本申请实施例适用的卫星通信系统的另一种网络架构示意图，该网络架构中包括核心网设备110、卫星130和至少一个终端设备(如图1b中所示的终端设备140)。作为一种示例，图1b中的核心网设备和终端设备位于地面，而卫星位于高空中。
与图1a中所示的网络架构的区别之处在于，图1b所示的网络架构中，卫星上可以部署有无线接入网设备，例如基站。卫星可以自己生成小区信号，并转发至地面形成卫星小区，进而为地面上的终端设备提供服务覆盖区域。因此，该场景也可以称为卫星的再生(regenerative)形式。
在再生形式下，卫星小区随着卫星的移动而移动，即当卫星移动时，其生成的小区也跟随在地面上移动，因此可以称为“移动小区”。由于该“移动小区”是卫星自己生成的，因此卫星的“移动小区”可以跟随卫星的轨道在地面移动。一般情况下，当卫星移走后，后续会有新的卫星移过来，以保证尽可能的连续覆盖。新的卫星的覆盖区域和之前卫星的覆盖区域可以相同，也可以不同。可以理解，由于卫星的运行方向，波束发射方向，波束发射能力的不同，两个卫星的地面覆盖区域可能不一定完全相同。
尽管图1a和图1b中仅示出了一个终端设备，但应理解，一个无线接入网设备或卫星或核心网设备可以为一个或多个终端设备提供服务，本申请实施例对该卫星通信系统中包 括的核心网设备、无线接入网设备、卫星和终端设备的数量不作限定。此外，所述终端设备可以是固定位置的，也可以是可移动的，本申请也不限定。
无线接入网设备与终端设备之间以及终端设备和终端设备之间，可以通过授权频谱(licensed spectrum)进行通信，也可以通过非授权频谱(unlicensed spectrum)进行通信，也可以同时通过授权频谱和非授权频谱进行通信。无线接入网设备和终端设备之间以及终端设备和终端设备之间可以通过6吉兆赫(gigahertz，GHz)以下的频谱进行通信，也可以通过6GHz以上的频谱进行通信，还可以同时使用6GHz以下的频谱和6GHz以上的频谱进行通信。本申请实施例对无线接入网设备和终端设备之间所使用的频谱资源不做限定。
如图2所示，为移动卫星形成的地面静止小区的示意图，该图示出了一种理想场景，即地面小区完全静止，当一个卫星移走后，另一个卫星会完全覆盖之前的小区区域。地面静止小区的映射方式是指小区的位置在地面是不动的，移动卫星可以通过调整自己的波束形成这些小区。应理解，当卫星小区为地面静止小区时，移动卫星可以通过透明转发形式提供服务覆盖区域。
示例性的，在T1时刻：小区1和小区2由卫星1的波束覆盖，小区3和小区4由卫星2的波束覆盖。在T2时刻，虽然卫星1和卫星2都向左移动，但是依然可以调整自己的波束，保证小区1、小区2、小区3、小区4的覆盖。在T3时刻，相比T1时刻，卫星1和卫星2已经移动了足够的距离，卫星1无法通过调整波束再为小区2提供覆盖，卫星2也无法通过调整波束为小区4提供覆盖，此时，卫星2可以为小区2提供覆盖，而卫星3可以为小区4提供覆盖。
如图3所示，为移动卫星形成的地面移动小区的示意图。在该示例中，地面移动小区的映射方式是指，移动卫星并不动态调整它的波束方向，基站生成的波束随着卫星/基站的移动在地面上移动。应理解，当卫星小区为地面移动小区时，移动卫星可以通过透明转发形式或者再生形式提供服务覆盖区域。
示例性的，在T1时刻，一块区域由卫星1形成的小区1和小区2，以及卫星2形成的小区3和小区4覆盖。由于小区1、小区2、小区3和小区4随着卫星1和卫星2的移动而移动，在T3时刻，在这块区域变成了由卫星1形成的小区2、卫星2形成的小区3和小区4、以及新移动过来的卫星3形成的小区5覆盖。
本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着通信网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
下面对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
1)本申请实施例中所涉及的终端设备，是一种具有无线收发功能的设备，可以部署在陆地上，包括室内或室外、手持、穿戴或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等。所述终端设备可以经无线接入网(radio access network，RAN)与核心网进行通信，与RAN交换语音和/或数据。所述终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾 驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。本申请的实施例对应用场景不做限定。终端设备有时也可以称为用户设备(user equipment，UE)、移动台和远方站等，本申请的实施例对终端设备所采用的具体技术、设备形态以及名称不做限定。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备或智能穿戴式设备等，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能头盔、智能首饰等。
本申请实施例中的终端设备还可以是作为一个或多个部件或者单元而内置于车辆的车载模块、车载模组、车载部件、车载芯片或者车载单元，车辆通过内置的所述车载模块、车载模组、车载部件、车载芯片或者车载单元可以实施本申请的方法。
2)本申请实施例中所涉及的无线接入网设备，是网络中用于将终端设备接入到无线网络的设备。所述无线接入网设备可以为无线接入网中的节点，又可以称为基站，还可以称为RAN节点。在本申请中，无线接入网设备是指部署在地面或卫星上的无线接入网设备，在下文的描述中，无线接入网设备可以简称为接入网设备或网络设备。
所述接入网设备可以包括LTE系统或演进的LTE系统(LTE-Advanced，LTE-A)中的演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，如传统的宏基站eNB和异构网络场景下的微基站eNB，或者也可以包括5G系统或NR系统中的下一代节点B(next generation node B，gNB)，或者也可以包括无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、传输接收点(transmission reception point，TRP)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(base band unit，BBU)、基带池BBU pool，或无线保真(wireless fidelity，WiFi)接入点(access point，AP)、接入回传一体化(integrated access and backhaul，IAB)节点等，再或者也可以包括云接入网(cloud radio access network，CloudRAN)系统中的集中式单元(centralized unit，CU)和/或分布式单元(distributed unit，DU)，本申请实施例并不限定。
例如，在一种网络结构中，网络设备可以为CU节点、或DU节点、或为包括CU节点和DU节点的接入网设备。进一步地，CU节点可以划分为控制面(CU-CP)和用户面(CU-UP)，其中CU-CP负责控制面功能，主要包含无线资源控制(radio resource control，RRC)和分组数据汇聚协议(packet data convergence protocol，PDCP)-C，PDCP-C主要负责控制面数据的加解密，完整性保护，数据传输等。CU-UP负责用户面功能，主要包含SDAP和PDCP-U，SDAP主要负责将核心网的数据进行处理并将流(flow)映射到承载(bearer)，PDCP-U主要负责数据面的加解密，完整性保护，头压缩，序列号维护，数据传输等。CU-CP与CU-UP可通过E1接口连接。CU-CP代表CU通过Ng接口和核心网连接，通过F1-C(控制面)和DU连接。CU-UP通过F1-U(用户面)和DU连接。当然还 有一种可能的实现是PDCP-C也在CU-UP。
3)本申请实施例中所涉及的核心网设备，是指为终端设备提供业务支持的核心网(core network，CN)中的设备。目前，一些核心网设备的举例包括：接入与移动性管理功能(access and mobility management function，AMF)实体、会话管理功能(session management function，SMF)实体、用户面功能(user plane function，UPF)实体等。其中，AMF实体用于负责终端设备的接入管理和移动性管理；SMF实体用于负责会话管理，如用户的会话建立等；UPF实体是用户面的功能实体，主要用于负责连接外部网络。应注意，本申请中的实体也可以称为网元或功能实体，即AMF实体也可以称为AMF网元或AMF功能实体，SMF实体也可以称为SMF网元或SMF功能实体。在本申请下文的描述中，核心网设备可以是指AMF。
4)本申请实施例中所涉及的卫星，是指位于卫星上的网络设备，为了便于说明，可以将“卫星上的网络设备”简称为“卫星”。所述卫星可以是低轨卫星(low earth orbiting，LEO)或者中轨卫星或者其他位于高空中移动的网络设备。一般来说，按照卫星的轨位高度，卫星通信系统中的卫星可分为高轨卫星(geostationary earth orbiting，GEO)、低轨卫星(LEO)和中轨卫星三类。其中，高轨卫星又可以称为静止卫星，高轨卫星的运行速度与地球自转速度相同，因此，高轨卫星相对地面保持静止状态，相应地，高轨卫星形成的卫星小区也是静止的。低轨卫星又可以称为近地轨道卫星，低轨卫星相对地面移动速度较快，因此，低轨卫星形成的卫星小区可随着卫星的移动而移动。中轨卫星是指位于轨道高度位于高轨卫星与低轨卫星之间的卫星。
5)需要说明的是，本申请实施例中的术语“系统”和“网络”可被互换使用。“多个”是指两个或两个以上，鉴于此，本申请实施例中也可以将“多个”理解为“至少两个”。“至少一个”，可理解为一个或多个，例如理解为一个、两个或更多个。例如，包括至少一个，是指包括一个、两个或更多个，而且不限制包括的是哪几个。例如，包括A、B和C中的至少一个，那么包括的可以是A、B、C，A和B，A和C，B和C，或A和B和C。同理，对于“至少一种”等描述的理解，也是类似的。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，字符“/”，如无特殊说明，一般表示前后关联对象是一种“或”的关系。
除非有相反的说明，本申请实施例提及“第一”、“第二”等序数词用于对多个对象进行区分，不用于限定多个对象的顺序、时序、优先级或者重要程度，并且“第一”、“第二”的描述也并不限定对象一定不同。
本申请实施例中所涉及的小区可以是NTN小区，例如卫星小区。
本申请实施例还可以应用于小区切换的场景下，终端设备可能会因位置的移动、业务的变化、网络覆盖情况的改变或是其它原因而发生从源网络设备到目标网络设备的切换。其中，源网络设备是指终端设备在执行切换前接入的网络设备，或者说是切换前为终端设备提供服务的网络设备；目标网络设备是指终端设备需要切换至的网络设备，或者说是终端设备在成功执行切换后接入的网络设备，或者说是切换成功后为终端设备提供服务的网络设备。相应的，源小区是指终端设备在执行切换前接入的小区，该源小区为源网络设备覆盖下的小区，或者说源小区为源网络设备管辖的小区，或者说源小区属于源网络设备。目标小区是指终端设备在执行切换后接入的小区，该目标小区为目标网络设备覆盖下的小 区，或者说目标小区为目标网络设备管辖的小区，或者说目标小区属于目标网络设备。
为有效提高切换可靠性，上述小区切换可以是CHO。在CHO机制中，网络(如源网络设备)可以给终端设备配置一个或多个候选小区，所述候选小区也可以称为候选目标小区。若网络给终端设备配置多个候选小区，则网络可以通过一条或者多条RRC消息向终端设备发送该多个候选小区分别对应的CHO配置信息。上述RRC消息可以是新定义的消息(如CondRRCReconfiguration，或者具有其他命名/表达形式，并不限定)或重用现有的RRC消息(如RRC重配置消息)。
源网络设备可以在源链路信号质量较好时向终端设备发送RRC消息，该RRC消息中可以包含至少一个候选小区对应的CHO配置信息。一个候选小区对应的CHO配置信息中可以包括CHO执行条件信息以及该候选小区的相关信息。
其中，候选小区的相关信息可以包括下列信息中的一项或多项：候选小区为终端设备分配的小区无线网络临时标识(cell radio network temporary identifier，C-RNTI)，接入候选小区所需的随机接入信道(random access channel，RACH)资源信息，候选小区对应的索引信息(如该小区对应的测量标识measID和/或该小区对应的CHO重配置标识CondReconfigId)，候选小区的小区全球标识(cell global identifier，CGI)，候选小区的物理小区标识(physical cell identifier，PCI)，候选小区对应的频率信息，候选小区对应的物理层配置参数，媒体接入控制(media access control，MAC)层配置参数，无线链路控制(radio link control，RLC)层配置参数，分组数据汇聚(packet data convergence，PDCP)层配置参数，服务数据适配协议(service data adaptation protocol，SD AP)层配置参数，RRC层配置参数等。所述候选小区的频率信息可以包括下列的一项或多项：同步信号块(synchronization signal block，SSB)的绝对频率(如absoluteFrequencySSB)、参考资源模块(common RB0)的绝对频率位置(如absoluteFrequencyPointA)、频率带宽列表(如frequencyBandList)、子载波间隔(subcarrier spacing，SCS)特定的载波列表(如scs-SpecificCarrierList)。
CHO执行条件信息用于指示候选小区对应的CHO执行条件，所述CHO执行条件也可以称为CHO触发条件。以基于小区的信号质量的CHO执行条件为例(即CHO执行条件中的触发量(trigger quantity)为小区的信号质量)，CHO执行条件信息可以包括CHO执行事件类型和相应的门限值，CHO执行事件类型可以包括事件A3、事件A4、事件A5、事件B1、事件B2或其他执行事件类型等。
一个候选小区可以被配置一个或多个CHO执行条件。例如，一个候选小区可以被配置一个执行事件类型，但是被配置至多两个不同的触发量，以及针对每个触发量的至少两个不同的门限值，该触发量为小区的信号质量，例如可以包括参考信号接收功率(reference signal received power，RSRP)、参考信号接收质量(reference signal received quality，RSRQ)、信号干扰噪声比(signal to interference plus noise ratio，SINR)中的一项或多项。或者，一个候选小区可以被配置至少两个不同的执行事件类型、以及各执行事件类型相对应的门限值。不同的候选小区分别对应的CHO执行事件类型和/或执行事件类型对应的门限值可以相同，也可以不同，不做限定。
可以理解，本申请实施例中的源小区、目标小区或者候选小区可以是上面所介绍的NTN小区，例如卫星小区。可选的，源小区、目标小区或者候选小区的服务覆盖区域可以划分为多个区域，不同的区域可以对应不同的PLMN和/或不同的AMF，形成不同的虚拟 小区。
图4示例性示出了CHO机制下的切换流程，在该示例中，源基站为UE配置了两个候选小区，两个候选小区分别受候选目标基站1和候选目标基站2的管理。该切换流程可以包括：在步骤S401中，源基站向UE下发测量配置，并相应在步骤S402中接收UE上报的测量报告。在步骤S403-a和步骤S404-a中，源基站与候选目标基站1进行CHO切换准备，源基站可以向候选目标基站1发送切换请求消息，并从候选目标基站1接收切换请求确认消息，该切换请求确认消息中可以包括候选目标小区1的CHO配置信息。在步骤S403-b和步骤S404-b中，源基站与候选目标基站2进行CHO切换准备，源基站可以向候选目标基站2发送切换请求消息，并从候选目标基站2接收切换请求确认消息，该切换请求确认消息中可以包括候选小区2的CHO配置信息。在步骤S405中，源基站可以向UE发送RRC消息，该RRC消息中包括候选小区1和候选小区2分别对应的CHO配置信息。进而，在步骤S406中，当UE接收到该RRC消息后，可根据候选小区1和候选小区2各自的CHO配置信息，判断候选小区1和候选小区2各自的CHO执行条件是否满足，并将候选小区1和候选小区2中满足CHO执行条件的小区作为目标小区。后续，UE可以向目标小区所属的基站发起随机接入，以便接入目标小区。假设UE确定候选小区1为目标小区，则在步骤S407中，UE可以与候选目标基站1(即目标基站)进行随机接入过程，随机接入过程成功后，在步骤S408中，UE可以向候选目标基站1(即目标基站)发送RRC重配置完成消息。可以理解，当UE确定候选小区1为目标小区之后，候选目标基站也可以被称为目标基站。需要说明的是，图4仅是CHO流程的一种示例，CHO流程还可能会有其他变形，本申请不作限定。图4中的各步骤可以是可选执行的，且各步骤之间的执行顺序可以改变。
具体的，UE可以根据CHO配置信息进行CHO执行条件是否满足的判断。在一个示例中，假设为候选小区1配置的CHO执行事件类型是A3事件，触发量为小区的信号质量，对应的门限值为第一阈值，则当候选小区1的小区信号质量高于服务小区的小区信号质量第一阈值时，可以认为候选小区1满足CHO执行条件，该候选小区1可以被确定为目标小区。应注意，所述信号质量可以包括RSRP、RSRQ和SINR中的一项或多项，例如，信号质量可以包括RSRP和RSRQ，或者包括RSRP和SINR，或者包括其他参数，并不限定。当信号质量中包括多个参数时，可以认为它们中的每个都是一个单独的触发量，例如，当信号质量包括RSRP和RSRQ时，可以认为RSRP是一个触发量，RSRQ是另一个触发量。对于不同的触发量来说，对应的第一阈值可以相同也可以不同，不作限定。具体的，对于候选小区1，配置A3事件，并配置两个触发量，分别为RSRP和RSRQ，配置的对应RSRP的第一阈值为E，配置的对应RSRQ的第一阈值为F，则当候选小区1的RSRP比服务小区的RSRP高出E，且候选小区1的RSRQ比服务小区的RSRQ高出F时，可以认为候选小区1满足CHO执行条件，该候选小区1可以被确定为目标小区。
在另一个示例中，假设为候选小区1配置的CHO执行事件类型是A5事件，触发量为小区的信号质量，且配置的对应的门限值为第二阈值、第三阈值，则当候选小区1的小区信号质量高于第二阈值，且服务小区的小区信号质量低于第三阈值时，可以认为候选小区1满足CHO执行条件，该候选小区1可以被确定为目标小区。
在另一个示例中，假设为候选小区1配置的CHO执行事件类型是A3事件、A5事件，A3事件配置的触发量为RSRP，A3事件配置的对应的门限值为第一阈值；A5事件配置的 触发量为RSRQ，A5事件配置的对应的门限值为第二阈值、第三阈值，则当候选小区1的RSRP比服务小区的RSRP高出第一阈值，且当候选小区1的RSRQ高于第二阈值，且服务小区的RSRQ低于第三阈值时，可以认为候选小区1满足CHO执行条件，该候选小区1可以被确定为目标小区。
需要说明的是，上述的示例仅是举例说明，本申请实施例不限于此。
考虑到NTN通信存在显著的传播时延，可能会造成切换失败，因此NTN通信系统中采用CHO机制增益明显。在NTN通信系统中，由于卫星的移动轨迹是有规律的，网络设备可以知道星历图，例如，具体某个地理位置处的终端设备是由哪个小区/基站为之提供服务，或者具体某段时间段内是由哪个小区/基站为终端设备提供服务。因此，NTN通信系统中的CHO机制可以引入根据位置信息、时间信息来判断CHO执行条件是否满足的准则。
具体的，NTN通信系统的CHO机制中可具有下列三种CHO执行条件信息：
1)基于信号质量。CHO执行条件信息可以包括CHO执行事件类型和相应的门限值。具体可参考上文中关于CHO执行条件信息的相关介绍。
2)基于位置信息。CHO执行条件信息可以是地理位置信息。示例性的，在一种实施方式中，地理位置信息可以是终端设备在地面的地理位置信息，例如CHO执行条件信息可以包括经纬度数值，该经纬度数值可以用来确定某一块区域或某一固定点，当终端设备的地理位置满足该经纬度要求时，如当终端设备移动到该经纬度数值所指示的区域内或固定点位置时，终端设备可以执行切换。或者，在另一种实施方式中，地理位置信息可以是终端设备与卫星之间的距离，例如CHO执行条件信息可以包括距离门限值，当终端设备与卫星之间的距离达到门限值时，UE可以执行切换。或者，在又一种实施方式中，地理位置信息可以是全球定位系统(global positioning system，GPS)信息或时间提前量(timing advance，TA)或其他信息，在该实施方式中，一个候选小区可以对应一个或多个CHO执行条件信息，且该候选小区有对应的相关信息(即候选小区的相关信息)，不同的候选小区对应的CHO执行条件信息可以相同或不同，不作限定。
3)基于时间/定时器信息。CHO执行条件信息可以是时间信息。示例性的，在一种实施方式中，CHO执行条件信息可以是绝对时间值，例如某一具体时刻数值(如世界标准时间(coordinated universal time，UTC)12：00)或某一具体时间段数值(如UTC 12:00-UTC13:00))，即当绝对时间到达时，终端设备可以执行切换。或者，在另一种实施方式中，CHO执行条件信息可以是相对时间值，例如定时器的有效时长，即终端设备接收到包含CHO配置信息的RRC消息后，启动定时器，当定时器的有效时长到达，终端设备可以执行切换。在该实施方式中，一个候选小区可以对应一个或多个CHO执行条件信息，且该候选小区有对应的相关信息(即候选小区的相关信息)，不同的候选小区对应的CHO执行条件信息可以相同或不同。
网络在进行CHO配置时，可以将上述3种CHO执行条件信息中的至少一种配置成CHO执行条件信息。例如，可以将CHO执行事件类型及相应的门限值、绝对时间值配置成CHO执行条件信息，则当绝对时间到达、且对应的候选小区的信号质量满足条件时，终端设备可以将该候选小区确定为目标小区，并执行切换。
可以理解，本申请实施例中，终端设备和/或网络设备可以执行本申请实施例中的部分或全部步骤，这些步骤或操作仅是示例，本申请实施例还可以执行其它操作或者各种操作的变形。此外，各个步骤可以按照本申请实施例呈现的不同的顺序来执行，并且有可能并 非要执行本申请实施例中的全部操作。
请参考图5，为本申请实施例提供的一种通信方法的流程示意图，该方法包括：
步骤S501、终端设备接收来自源网络设备的N个CHO配置信息，每个CHO配置信息指示该CHO配置信息对应的候选小区的CHO执行条件，所述CHO执行条件为基于位置信息和/或时间信息和/或信号质量信息的CHO执行条件，N为大于1的整数。
本申请实施例中，源网络设备可以为终端设备配置一个或多个候选小区，并可向终端设备提供每个候选小区对应的一个或多个CHO配置信息。示例性的，如果一个候选小区为覆盖一个国家的地理区域或一个运营商的服务区域的小区，或者说如果一个候选小区为支持一个多个公共陆地移动网络(public land mobile network，PLMN)和/或AMF的小区，则该候选小区可以对应一个CHO配置信息。如果一个候选小区为覆盖多个国家的地理区域或多个运营商的服务区域的小区，或者说如果一个候选小区为支持多个PLMN和/或AMF的小区，则该候选小区可以对应多个CHO配置信息，进一步地，该候选小区中不同的PLMN和/或AMF可以对应不同的CHO配置信息。如此可知，如果终端设备接收到来自源网络设备的N个CHO配置信息，则源网络设备为该终端设备配置的候选小区的个数M可小于或等于N，M为正整数。
具体的，所述N个CHO配置信息中的每个CHO配置信息中均可包括CHO执行条件信息，该CHO执行条件信息用于指示对应的候选小区的CHO执行条件。在本申请的实施例中，所述CHO执行条件具体是指基于位置信息和/或时间信息和/或信号质量信息的CHO执行条件，即所述CHO执行条件信息可以包括位置信息、时间信息或信号质量信息中的一种或多种。
可选的，源网络设备可以通过一条或多条RRC消息向终端设备发送所述N个CHO配置信息，并不限定。
步骤S502、终端设备在所述N个CHO配置信息中的任一CHO配置信息指示的CHO执行条件满足前，在源小区发生无线链路失败(radio link failure，RLF)。
本申请实施例中，所述CHO执行条件满足，也可以理解为CHO执行条件被触发。如果某一候选小区的CHO条件被触发，则意味着该候选小区将被确定为目标小区，终端设备可以尝试接入该候选小区。
鉴于此，所述步骤S502也可以是指，终端设备根据所述N个CHO配置信息，从所述N个CHO配置信息对应的候选小区中确定出目标小区之前，在源小区发生RLF。可以理解，在从所述N个CHO配置信息对应的候选小区中确定出目标小区之前，所述N个CHO配置信息中还没有任何一个CHO配置信息指示的CHO执行条件被触发，或者说没有任何一个候选小区的CHO执行条件被触发。
步骤S503、终端设备根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区。
在该实施例中，终端设备当前的位置可以是指终端设备在源小区发生RLF时的位置，该终端设备当前的位置可以是地理位置，如经纬度数值，也可以是相对位置，如终端设备与卫星之间的距离，并不限定。相应的，当前时间可以是指终端设备在源小区发生RLF时的时刻。当前的信号质量可以是指在源小区发生RLF时，各个候选小区和源小区和其他小区中的一个或多个小区的信号质量。
具体的，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息中的一个CHO配置信息相匹配，则终端设备可确定第一小区为匹配的第一CHO配置信息对应的第一候选小区。进而，终端设备可按照第一CHO配置信息接入该第一小区。
如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息中的多个CHO配置信息相匹配，则终端设备可从匹配的所述多个CHO配置信息对应的候选小区中选择一个候选小区作为第一小区，进而按照对应的CHO配置信息接入该第一小区。应注意，在该情形下，终端设备选择哪个候选小区作为第一小区，或者说终端设备选择接入哪个候选小区，可以基于终端设备实现，本申请并不限定。示例性地，终端设备可根据所述多个CHO配置信息分别对应的候选小区的信号质量，从所述多个CHO配置信息中确定第一CHO配置信息，该第一CHO配置信息对应的第一候选小区可以是所述N个CHO配置信息对应的候选小区中信号质量最好的一个候选小区，所述信号质量可以包括RSRP、RSRQ、SINR中的一项或多项，也可以还包含其他参数，并不限定。
可选的，第一CHO配置信息中可包括第一候选小区的相关信息，终端设备可使用该第一候选小区的相关信息，接入该第一候选小区。关于候选小区的相关信息的具体内容可参考上文中的描述，不再赘述。
如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，则终端设备可确定第一小区不是候选小区。终端设备可将所述N个CHO配置信息对应的候选小区之外的其他小区确定为第一小区，并在该第一小区进行重建立。该第一小区也可以是源小区，也可以是除源小区、候选小区之外的其他小区，并不限定。
需要说明的是，本申请实施例中，终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息中的一个或多个CHO配置信息相匹配，也可以理解为终端设备当前的位置和/或当前时间和/或当前的信号质量符合所述N个CHO配置信息中的一个或多个CHO配置信息。其中，终端设备当前的位置与某个CHO配置信息相匹配具体可以是指，终端设备当前的位置在该CHO配置信息对应的候选小区的小区范围内。可选的，如果CHO执行条件为基于位置的CHO执行条件，则该CHO配置信息中的CHO执行条件信息可以包括位置信息，该位置信息用于指示该CHO配置信息对应的候选小区的小区范围。该位置信息可以为区域信息，用于指示地面上的一块地理区域，例如用经纬度数值及半径表示，如此，如果终端设备当前的位置位于该区域信息指示的地理区域的范围内，则可表示终端设备当前的位置与该CHO配置信息相匹配。或者，该位置信息也可以是距离信息，用于指示终端设备与卫星之间的距离的区间范围或门限值，如此，如果终端设备当前与卫星之间的距离位于该距离信息指示的距离的区间范围内，或者达到该距离信息指示的距离的门限值时，则可表示终端设备当前的位置与该CHO配置信息相匹配。可以理解，终端设备当前的位置与某个CHO配置信息不匹配是指，终端设备当前的位置不在该CHO配置信息对应的候选小区的小区范围内。
当前时间与某个CHO配置信息相匹配具体可以是指，当前时间在该CHO配置信息对应的候选小区的时间范围内。可选的，如果CHO执行条件为基于时间的CHO执行条件，则该CHO配置信息中的CHO执行条件信息可以包括时间信息，该时间信息用于指示该CHO配置信息对应的候选小区的时间范围。该时间信息可以为时间段信息或者说是时间区间信息，例如可以用时间段的起始时间和结束时间的具体时刻数值来表示，如此，如果当 前时间在该时间段信息指示的时间范围内，则可表示当前时间与该CHO配置信息相匹配。或者，该时间信息也可以是定时器信息，例如用定时器的有效时长来表示，该定时器在终端设备接收到该CHO配置信息时启动，如此，如果该时间信息指示的定时器在当前时间触发，即达到有效时长，则可认为当前时间与该CHO配置信息相匹配。
当前的信号质量与某个CHO配置信息相匹配具体可以是指，当前的信号质量在该CHO配置信息对应的小区信号质量范围内。可选的，如果CHO执行条件为基于信号质量的CHO执行条件，则该CHO配置信息中的CHO执行条件信息可以包括信号质量信息，该信号质量信息用于指示该CHO配置信息对应的候选小区的信号质量范围。例如该信号质量信息可以指示信号质量阈值，如果终端设备当前的信号质量大于该信号质量信息指示的信号质量阈值，则可表示当前的信号质量与该CHO配置信息相匹配。
应注意，如果CHO执行条件为基于位置信息、时间信息、信号质量信息中的多种信息的CHO执行条件，则终端设备在判断是否与某一CHO配置信息相匹配时，可分别对终端设备当前的位置是否与该CHO配置信息中的位置信息相匹配，当前时间是否与该CHO配置信息中的时间信息相匹配，以及当前的信号质量是否与该CHO配置信息中的信号质量相匹配进行判断。而且，本申请实施例对终端设备当前的位置、当前时间、当前的信号质量之间的判断顺序不作具体限定。
示例性地，如果CHO执行条件为基于位置信息和时间信息的CHO执行条件，则在一种可能的实施方式中，如果终端设备当前的位置与该CHO配置信息中的位置信息相匹配，且当前时间与该CHO配置信息中的时间信息相匹配，则可认为终端设备与该CHO配置信息相匹配。在该实施方式是指，终端设备需要判断哪些参数是与CHO执行条件信息保持一致的，且不同的参数(即终端设备当前的位置和当前时间)之间是且的关系。可以理解为，由于CHO执行条件是基于位置信息和时间信息的，因此，需要对终端设备当前的位置和当前时间是否与该CHO配置信息相匹配进行判断。而当CHO执行条件为基于位置信息和信号质量信息的CHO执行条件，或者为基于时间信息和信号质量信息的CHO执行条件信息，或者为基于位置信息、时间信息和信号质量信息的CHO执行条件时，也是类似的。或者，在另一种可能的实施方式中，如果终端设备当前的位置与当前时间中存在任一与该CHO配置信息中对应的位置信息或时间信息相匹配，则可认为终端设备与该CHO配置信息相匹配。在该实施方式是指，终端设备需要判断哪些参数是与CHO执行条件信息保持一致的，但是不同的参数(即终端设备当前的位置和当前时间)之间是或的关系。
根据上述内容可知，在该实施例中，当终端设备在所述N个CHO配置信息中的任一CHO配置信息指示的CHO执行条件满足前，或者说终端设备根据所述N个CHO配置信息确定出要切换的目标小区前，与在源小区发生无线链路失败时，终端设备可根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或信号质量信息，来选择要接入的小区，该要接入的小区也可以理解为恢复连接的小区，或者重建立的小区等。如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息中的一个或多个CHO配置信息相匹配，则终端设备可选择源网络设备为其配置的某个候选小区接入。具体的，终端设备可选择与其匹配的一个或多个CHO配置信息中的第一CHO配置信息对应的第一候选小区作为第一小区，并根据该第一CHO配置信息中的该第一候选小区的相关信息，如该第一候选小区为终端设备分配的C-RNTI、接入该第一候选小区所需的RACH资源信息等，接入该第一候选小区。
如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，则终端设备可选择其他小区接入，而不是源网络设备为其配置的候选小区。即在该情形下，终端设备可将其他小区(即非候选小区)确定为要接入的第一小区，并在该第一小区进行重建立。
由此可知，上述技术方案提供了一种在CHO执行条件为基于位置信息和/或时间信息和/或信号质量信息的CHO执行条件的场景下，当终端设备在CHO执行条件满足前在源小区发生无线链路失败时的CHO失败处理机制。终端设备可根据发生无线链路失败时的位置、时间、信号质量以及CHO配置信息确定恢复连接的小区，从而使得终端设备在发生无线链路失败后能进行合理的处理，减少由于无线链路失败造成的中断时延，提高系统性能。
在一个具体示例中，源网络设备可以为终端设备提供三个CHO配置信息，分别为CHO配置信息A、CHO配置信息B和CHO配置信息C。具体的，CHO配置信息A中包括区域信息A和相关信息A，其中，区域信息A用于指示该CHO配置信息A对应的候选小区A的CHO执行条件，例如，该区域信息A可以为{(经度值1，纬度值1)，半径1或直径1}，表示当终端设备的位置在{(经度值1，纬度值1)，半径1或直径1}所标识的候选小区A的小区范围内时对应的CHO执行条件满足，相关信息A用于指示该CHO配置信息A对应的候选小区A的相关信息，如候选小区A为终端设备分配的C-RNTI、接入候选小区A所需的RACH资源信息等。CHO配置信息B中包括区域信息B和相关信息B，其中，区域信息B用于指示该CHO配置信息B对应的候选小区B的CHO执行条件，例如该区域信息B可以为{(经度值2，纬度值2)，半径2或直径2}，表示当终端设备的位置在{(经度值2，纬度值2)，半径2或直径2}所标识的候选小区B的小区范围内时对应的CHO执行条件满足，相关信息B用于指示该CHO配置信息B对应的候选小区B的相关信息。CHO配置信息C中包括区域信息C和相关信息C，其中，区域信息C用于指示该CHO配置信息C对应的候选小区C的CHO执行条件，该区域信息C可表示为{(经度值3，纬度值3)，半径3或直径3}，表示当终端设备的位置在{(经度值3，纬度值3)，半径3或直径3}所标识的候选小区C的小区范围内时对应的CHO执行条件满足，相关信息C用于指示该CHO配置信息C对应的候选小区C的相关信息。如此，终端设备在接收到上述CHO配置信息A、CHO配置信息B和CHO配置信息C之后，如果在各个CHO执行条件满足前，在源小区发生RLF，在该情形下，如果终端设备此时位于区域信息B指示的候选小区B的小区范围内，则终端设备可采用相关信息B接入候选小区B。如果终端设备此时不在区域信息A指示的候选小区A的小区范围内，也不在区域信息B指示的候选小区B的小区范围内，也不在区域信息C指示的候选小区C的小区范围内，则终端设备可以在其他小区进行重建立。
可选的，终端设备在源小区发生RLF之后，还可以记录与连接失败相关的信息，生成第一报告，并向第一网络设备上报该第一报告。该第一报告中可包括下列信息中的一项或多项：
1)、failedPcellID：连接失败小区的小区信息，或者说终端设备检测到RLF的小区的小区信息。
所述小区信息可以包括小区全局标识(cell global identifier，CGI)，和/或，物理小区标识(physical cell identifier，PCI)以及频点信息。所述CGI中可以包括PLMN ID和小区 ID。可选的，所述小区信息中还可包括跟踪区码(tracking area code，TAC)和RAN区域码(RAN area code，RANAC)中的至少一种，下文中将不再赘述。
2)、connectionFailureType：连接失败类型，如RLF。
3)、previousPCellId：源小区的小区信息。
4)、源小区发生RLF后，终端设备恢复连接的小区信息，或者在源小区发生RLF后，终端设备接入的小区的小区信息。
5)、源小区分配给终端设备的C-RNTI。
6)、timeconnFailure、源小区发生RLF时的时间信息，即源小区发生RLF的时刻，也可称为连接失败时间。例如，可以是源小区发生RLF时的绝对时间值(如UTC)，也可以是相对时间值(如终端设备从最后一次接收到RRC重配置消息至源小区发生RLF时的时间段)。
7)、源小区发生RLF到连接恢复的时间段信息。
8)、源小区发生RLF到上报该第一报告的时间段信息，和/或，终端设备连接恢复到上报该第一报告的时间段信息。
9)、源小区发生RLF时终端设备的位置信息。例如可以是终端设备的绝对位置(如经纬度数值)，也可以是终端设备的相对位置(如终端设备与卫星之间的距离)，不作限定。
10)、源小区和/或各个候选小区的信号质量。例如可以包括终端设备接收到CHO配置信息时，源小区发生RLF时，终端设备的连接恢复时，终端设备上报该第一报告时等多个时间节点中的一个或时间节点的源小区和/或各个候选小区各自的信号质量。所述信号质量可以包括小区信号质量和/或属于该小区的至少一个波束的信号质量，所述信号质量可以包括RSRP、RSRQ、SINR中的一项或多项，也可以是基于SSB和/或信道状态信息参考信号(channel state information-reference signal，CSI-RS)的无线资源管理(radio resource management，RRM)测量得到的测量结果，下文中将不再赘述。
需要说明的是，所述第一网络设备可以是源小区所属的网络设备(即源网络设备)，也可以是候选小区所属的网络设备(即候选目标网络设备)，也可以是恢复连接的小区或重建立的小区所属的网络设备(即第一小区所属的网络设备)，或者还可以是其他网络设备，如核心网的网元，并不限定。
具体的，终端设备向第一网络设备上报第一报告的过程可如图6所示。在步骤S601中，终端设备可以向第一网络设备发送第一指示信息，该第一指示信息指示终端设备记录有所述第一报告，该第一报告中包括连接失败的相关信息，或者该第一指示信息也可以理解为用于指示终端设备记录/保存有连接失败的相关信息。所述连接失败的相关信息具体可以是上面所列出的第一报告中包括的一种或多种信息。进而，在步骤S602中，第一网络设备可向终端设备发送第一请求消息，该第一请求消息用于请求终端设备上报所述第一报告。可选的，所述第一请求消息可以是用户信息请求(UEinformationRequest)消息。在步骤S603中，终端设备向该第一网络设备发送第一响应消息，该第一响应消息中包括所述第一报告，该步骤S603也可以理解为终端设备向第一网络设备发送其记录的连接失败的相关信息。可选的，该第一响应消息可以是用户信息响应(UEinformationResponse)消息，该用户信息响应消息中包括终端设备记录的连接失败的相关信息。
可选的，如果第一网络设备不是源网络设备，则第一网络设备接收到该第一报告后，还可将该第一报告中的部分或全部信息发送给源网络设备。进一步地，源网络设备接收到 该第一报告中的部分或全部信息后，可根据接收到的该第一报告中的部分或全部信息，进行相应切换参数的调整。可选的，源网络设备还可以将接收到的该第一报告中的部分或全部信息的部分或全部发送给候选目标网络设备或重建立网络设备，进而候选目标网络设备或重建立网络设备接收到这些信息后，可以根据接收到的信息进行相应切换参数的调整。所述候选目标网络设备可以是一个或多个，并不限定。
可选的，如果第一网络设备不是候选目标网络设备，则第一网络设备接收到该第一报告后，还可将该第一报告中的部分或全部信息发送给候选目标网络设备。进一步地，候选目标网络设备接收到该第一报告中的部分或全部信息后，可根据接收到的该第一报告中的部分或全部信息，进行相应切换参数的调整。可选的，候选目标网络设备还可以将接收到的第一报告中的部分或全部信息的部分或全部发送给源网络设备或重建立网络设备，进而源网络设备或重建立网络设备接收到这些信息后，可根据接收到的信息进行相应切换参数的调整。
请参考图7，为本申请实施例提供的另一种通信方法的流程示意图，该方法包括：
步骤S701、终端设备接收来自源网络设备的N个CHO配置信息，每个CHO配置信息指示该CHO配置信息对应的候选小区的CHO执行条件，所述CHO执行条件为基于位置信息和/或时间信息和/或信号质量信息的CHO执行条件，N为大于1的整数。
关于步骤S701的具体实施方式，可参考上文中对步骤S501的相关描述，不再赘述。应注意的是，在该实施例中，所述CHO执行条件具体是指基于位置信息和/或时间信息和/或信号质量信息的CHO执行条件。
步骤S702、终端设备在所述N个CHO配置信息中的第二CHO配置信息指示的CHO执行条件满足后，执行到该第二CHO配置信息对应的第二候选小区的切换。
步骤S703、如果在该第二候选小区发生接入或切换失败(handover failure，HOF)，则终端设备根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区。
本申请实施例中，所述CHO执行条件满足，也可以理解为CHO执行条件被触发。如此，在步骤S702中，如果第二CHO配置信息指示的CHO执行条件被触发，则意味着终端设备将该第二候选小区确定为目标小区，并执行相应的切换过程，尝试接入该第二候选小区。
鉴于此，在步骤S503中所述的终端设备在该第二候选小区发生接入或切换失败可以是指，终端设备根据所述N个CHO配置信息，从所述N个CHO配置信息对应的候选小区中确定出目标小区之后，在该目标小区发生接入失败或切换失败，或者说终端设备没有成功接入或切换到确定出的目标小区。
在该实施例中，终端设备当前的位置可以是指终端设备在第二候选小区发生接入或切换失败时的位置，该终端设备当前的位置可以是地理位置，如经纬度数值，也可以是相对位置，如终端设备与卫星之间的距离，并不限定。相应的，当前时间可以是指终端设备与第二候选小区发生接入失败或切换失败时的时刻。当前的信号质量可以是指在第二候选小区发生接入失败或切换失败时，各个候选小区和源小区和其他小区中的一个或多个小区的信号质量。
具体的，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个 CHO配置信息中的一个CHO配置信息相匹配，则终端设备可确定第一小区为匹配的第一CHO配置信息对应的第一候选小区，进而终端设备可按照第一CHO配置信息接入该第一小区。
如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息中的多个CHO配置信息相匹配，则终端设备可从匹配的所述多个CHO配置信息对应的候选小区中选择一个候选小区作为第一小区，进而按照对应的CHO配置信息接入该第一小区。应注意，在该情形下，终端设备选择哪个候选小区作为第一小区，或者说终端设备选择接入哪个候选小区，可以基于终端设备实现，本申请并不限定。示例性地，终端设备可根据所述多个CHO配置信息分别对应的候选小区的信号质量，从所述多个CHO配置信息中确定第一CHO配置信息，该第一CHO配置信息对应的第一候选小区可以是所述N个CHO配置信息对应的候选小区中信号质量最好的一个候选小区，所述信号质量可以是RSRP、RSRQ、SINR中的一项或多项，也可以包含其他参数，并不限定。
可选的，第一CHO配置信息中可包括第一候选小区的相关信息，终端设备可使用该第一候选小区的相关信息，接入该第一候选小区。关于候选小区的相关信息的具体内容可参考上文中的描述，不再赘述。
如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，但是终端设备当前的位置在源小区的小区范围内，则终端设备可确定第一小区为源小区，进而在该源小区进行重建立，也就是说，在该情形下终端设备可以回退到源小区。
如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，而且终端设备当前的位置也不在源小区的小区范围内，则终端设备可确定第一小区不是候选小区，也不是源小区。终端设备可以将所述N个CHO配置信息对应的候选小区以及源小区之外的其他小区确定为第一小区，并在该第一小区进行重建立。
关于终端设备当前的位置和/或当前时间和/或当前的信号质量与CHO配置信息相匹配的含义，以及判断终端设备当前的位置和/或当前时间和/或当前的信号质量是否与某个CHO配置信息相匹配的方式可参考上文中的相关描述，在此不再重复。
根据上述内容可知，在该实施例中，当终端设备在所述N个CHO配置信息中的第二CHO配置信息指示的CHO执行条件满足后，在该第二CHO配置信息对应的第二候选小区发生接入失败或切换失败时，或者说当终端设备根据所述N个CHO配置信息确定出目标小区后，但在该目标小区发生接入失败或切换失败时，终端设备可根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，来选择要接入的小区，该要接入的小区也可以理解为恢复连接的小区，或者重建立的小区等。如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息中的一个或多个CHO配置信息相匹配，则终端设备可选择源网络设备为其配置的某个候选小区接入。具体的，终端设备可选择与其匹配的一个或多个CHO配置信息中的第一CHO配置信息对应的第一候选小区作为第一小区，并根据该第一CHO配置信息中的该第一候选小区的相关信息，如该第一候选小区为终端设备分配的C-RNTI、接入该第一候选小区所需的RACH资源信息等，接入该第一候选小区。关于选择第一CHO配置信息或第一候选小区的方式，本申请不作具体限定。
如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信 息都不匹配，但终端设备当前的位置在源小区的小区范围内，则终端设备可以回退到源小区，在源小区进行重建立。也就是说，在该情形下，第一小区为源小区，终端设备可以选择接入源小区。
如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，且终端设备当前的位置也不在源小区的小区范围内，则在该情形下，第一小区既不是候选小区，也不是源小区，终端设备可将其他小区(即非候选小区、非源小区)确定为要接入的第一小区，并在该第一小区进行重建立。
由此可知，上述技术方案提供了一种在CHO执行条件为基于位置信息和/或时间信息和/或信号质量信息的CHO执行条件的场景下，当终端设备在CHO执行条件满足后但在候选小区发生接入或切换失败时的CHO失败处理机制。终端设备可根据发生接入或切换失败时的位置、时间、信号质量以及CHO配置信息确定要接入的小区，从而使得终端设备在接入或切换失败后能进行合理的处理，减少由于接入或切换失败造成的中断时延，提高系统性能。
在一个具体示例中，源网络设备可以为终端设备提供三个CHO配置信息，分别为CHO配置信息A、CHO配置信息B和CHO配置信息C。具体的，CHO配置信息A中包括时间段信息A和相关信息A，其中，时间段信息A用于指示该CHO配置信息A对应的候选小区A的CHO执行条件，例如，该时间段信息A可以为{UTC time1，UTC time2}，表示当时间到达{UTC time1，UTC time2}时，候选小区A的CHO执行条件满足；相关信息A用于指示该CHO配置信息A对应的候选小区A的相关信息，如候选小区A为终端设备分配的C-RNTI、接入候选小区A所需的RACH资源信息等。CHO配置信息B中包括时间段信息B和相关信息B，其中，时间段信息B用于指示该CHO配置信息B对应的候选小区B的CHO执行条件，例如，该时间段信息B可以为{UTC time3，UTC time4}，表示当时间到达{UTC time3，UTC time4}时，候选小区B的CHO执行条件满足；相关信息B用于指示该CHO配置信息B对应的候选小区B的相关信息。CHO配置信息C中包括时间段信息C和相关信息C，其中，时间段信息C用于指示该CHO配置信息C对应的候选小区C的CHO执行条件，例如，该时间段信息C可以为{UTC time5，UTC time6}，表示当时间到达{UTC time5，UTC time6}时，候选小区C的CHO执行条件满足；相关信息C用于指示该CHO配置信息C对应的候选小区C的相关信息。如此，终端设备在接收到上述CHO配置信息A、CHO配置信息B和CHO配置信息C之后，当时间到达{UTC time1，UTC time2}时，候选小区A的CHO执行条件满足，终端设备可执行到候选小区A的切换。如果终端设备在该候选小区A发生接入或切换失败，则进一步地如果终端设备此时位于候选小区B的小区范围内，则终端设备可采用相关信息B接入候选小区B。如果终端设备此时不在候选小区A的小区范围内，也不在候选小区B的小区范围内，也不在候选小区C的小区范围内，但是在源小区的小区范围内，则终端设备可以回退到源小区。如果终端设备此时不在候选小区A的小区范围内，也不在候选小区B的小区范围内，也不在候选小区C的小区范围内，而且也不在源小区的小区范围内，则终端设备可以在其他小区进行重建立。
在另一个具体示例中，源网络设备可以为终端设备提供三个CHO配置信息，分别为CHO配置信息E、CHO配置信息F和CHO配置信息G。具体的，CHO配置信息E中包括定时器信息E和相关信息E，其中，定时器信息E用于指示该CHO配置信息E对应的候选小区E的CHO执行条件，例如定时器信息E可以为定时器E(即timer1)的有效时 长，表示当该定时器E的有效时长到达时，定时器E被触发，候选小区E的CHO执行条件满足，终端设备可以尝试接入该候选小区E；相关信息E用于指示该CHO配置信息E对应的候选小区E的相关信息，如候选小区E为终端设备分配的C-RNTI、接入候选小区E所需的RACH资源信息等。CHO配置信息F中包括定时器信息F和相关信息F，其中，定时器信息F用于指示该CHO配置信息F对应的候选小区F的CHO执行条件，例如，该定时器信息F可以为定时器F(timer2)的有效时长，表示当定时器F的有效时长到达时，定时器F被触发，候选小区F的CHO执行条件满足，终端设备可以尝试接入该候选小区F；相关信息F用于指示该CHO配置信息F对应的候选小区F的相关信息。CHO配置信息G中包括定时器信息G和相关信息G，其中，定时器信息G用于指示该CHO配置信息G对应的候选小区G的CHO执行条件，例如，该定时器信息G可以为定时器G(即timer3)的有效时长，表示当定时器G的有效时长到达时，定时器G被触发，候选小区G的CHO执行条件满足，终端设备可以尝试接入该候选小区G；相关信息G用于指示该CHO配置信息G对应的候选小区G的相关信息。如此，终端设备在接收到上述CHO配置信息E、CHO配置信息F和CHO配置信息G之后，可启动定时器E、定时器F、定时器G。当定时器E的有效时长到达时，候选小区E的CHO执行条件满足，终端设备可执行到候选小区E的切换。如果终端设备在该候选小区E发生接入或切换失败，则进一步地如果终端设备此时位于候选小区F的小区范围内，则终端设备可采用相关信息F接入候选小区F。如果终端设备此时不在候选小区E的小区范围内，也不在候选小区F的小区范围内，也不在候选小区G的小区范围内，但是在源小区的小区范围内，则终端设备可以回退到源小区。如果终端设备此时不在候选小区E的小区范围内，也不在候选小区F的小区范围内，也不在候选小区G的小区范围内，而且也不在源小区的小区范围内，则终端设备可以在其他小区进行重建立。
可选的，终端设备在第二候选小区发生接入或切换失败之后，还可以记录连接失败的相关信息，生成第二报告，并向第一网络设备上报该第二报告。该第二报告中可包括下列信息中的一项或多项：
1)、failedPcellID：接入失败小区的小区信息，或者说终端设备接入或切换失败的小区的小区信息，即第二候选小区的小区信息。
2)、connectionFailureType：连接失败类型，如HOF或条件切换失败(conditional handover failure，CHOF)。
3)、previousPCellId：源小区的小区信息。
4)、接入失败后恢复连接的小区信息，即在第二候选小区发生接入或切换失败后，终端设备接入的第一小区的小区信息。
5)、源小区分配给终端设备的C-RNTI，和/或，接入失败小区(即第二候选小区)为终端设备分配的C-RNTI。
6)、终端设备接收到CHO配置信息到切换触发的时间段信息，或者说终端设备接收到CHO配置信息到终端设备与第二候选小区进行切换的时间段。可选的，当CHO执行条件信息为定时器信息时，该项信息可以为第二候选小区的定时器信息，即第二候选小区对应的定时器的有效时长。
7)、切换触发到接入失败的时间段信息。
8)、接入失败到连接恢复的时间段信息。
9)、连接恢复到上报第二报告的时间段信息，和/或，接入失败到上报第二报告的时间段信息。
10)、接入失败时的时间信息，如接入失败时的绝对时间值(如UTC时间)。
11)、接入失败时终端设备的位置信息。例如可以是终端设备的绝对位置(如经纬度数值)，也可以是终端设备的相对位置(如终端设备与卫星之间的距离)。
12)、源小区和/或各个候选小区(包括接入失败的候选小区以及其它候选小区)的信号质量。例如可以包括终端设备接收到CHO配置信息时，接入失败时，连接恢复时，上报该第二报告时等多个时间节点中的一个或多个时间节点的源小区和/或各个候选小区各自的信号质量。
需要说明的是，所述第一网络设备可以是源小区所属的网络设备(即源网络设备)，也可以是连接失败小区所属的网络设备(即候选目标网络设备)，也可以是恢复连接的小区或重建立的小区或成功接入的小区所属的网络设备(即第一小区所属的网络设备)，或者还可以是其他网络设备，并不限定。
具体的，终端设备向第一网络设备上报第二报告的过程，以及第一网络设备接收到第二报告后的处理过程可参考上文中对第一报告的相关描述，不再赘述。
可选的，如果终端设备成功接入第二候选小区，则终端设备还可记录接入成功的相关信息，生成第四报告，并向第一网络设备上报该第四报告。该第四报告中可包括下列信息中的一项或多项：
1)、successfulPcellID：接入成功小区的小区信息，或者说终端设备接入成功的小区的小区信息，即第二候选小区的小区信息。
2)、connectionSuccessType：连接成功类型，如CHO success。
3)、previousPCellId：源小区的小区信息。
4)、源小区分配给终端设备的C-RNTI，和/或，接入成功小区(即第二候选小区)为终端设备分配的C-RNTI。
5)、接入成功时的时间信息，如接入成功时的绝对时间值(如UTC时间)，或者相对时间值(如接收到CHO配置信息到接入成功的时间段信息)。
6)、接入成功到上报第四报告的时间段信息。
7)、接入成功时终端设备的位置信息。例如可以是终端设备的绝对位置(如经纬度数值)，也可以是终端设备的相对位置(如终端设备与卫星之间的距离)。
类似的，在该场景下，第一网络设备可以是源小区所属的网络设备(即源网络设备)，也可以是接入成功小区所属的网络设备(即目标网络设备)，或者还可以是其他网络设备，并不限定。
具体的，终端设备向第一网络设备上报第四报告的过程可参考上文中对第一报告、第二报告的相关描述，不再赘述。
可选的，如果第一网络设备不是源网络设备，则第一网络设备接收到该第四报告后，还可将该第四报告中的部分或全部信息发送给源网络设备。进一步地，源网络设备接收到该第四报告中的部分或全部信息后，可根据接收到的该第四报告中的部分或全部信息，进行相应切换参数的调整。可选的，源网络设备还可以将接收到的该第四报告中的部分或全部信息的部分或全部发送给目标网络设备，进而目标网络设备接收到这些信息后，可以根据接收到的信息进行相应切换参数的调整。
可选的，如果第一网络设备不是目标网络设备，则第一网络设备接收到该第四报告后，还可将该第四报告中的部分或全部信息发送给目标网络设备。进一步地，目标网络设备接收到该第四报告中的部分或全部信息后，可根据接收到的该第四报告中的部分或全部信息，进行相应切换参数的调整。可选的，目标网络设备还可以将接收到的第四报告中的部分或全部信息的部分或全部发送给源网络设备，进而源网络设备接收到这些信息后，可根据接收到的信息进行相应切换参数的调整。
请参考图8，为本申请实施例提供的另一种通信方法的流程示意图，该方法包括：
步骤S801、终端设备接收来自源网络设备的N个CHO配置信息，其中，每个CHO配置信息指示该CHO配置信息对应的候选小区的CHO执行条件，所述CHO执行条件为基于位置信息和/或时间信息和/或信号质量的CHO执行条件，N为大于1的整数。
关于步骤S801的具体实施方式，可参考上文中对步骤S501以及步骤S701的相关描述，不再赘述。应注意的是，在该实施例中，所述CHO执行条件具体是指基于位置信息和/或时间信息和/或信号质量信息的CHO执行条件。
步骤S802、在所述N个CHO配置信息中的任一CHO配置信息指示的CHO执行条件满足前，终端设备接收到来自源网络设备的第一消息，该第一消息指示终端设备执行传统切换。
在该实施例中，源网络设备可以保持与终端设备之间的RRC连接或数据传输，直至终端设备根据所述N个CHO配置信息，从所述N个CHO配置信息对应的候选小区中确定出目标小区，或者直至终端设备成功接入/切换到目标小区，此处，目标小区是指满足相应CHO执行条件的候选小区。如此，源网络设备在向终端设备发送包括所述N个CHO配置信息的RRC消息后，后续还可以向终端设备发送另一RRC消息，即步骤S802中的第一消息，该第一消息用于指示终端设备执行传统切换。该第一消息可以是传统的切换消息，或切换命令消息，或RRC重配置消息，或具有其他名称，并不限定。该第一消息还可以指示终端设备将要切换的目标小区。后续，终端设备接收到该第一消息之后，可以停止CHO流程，例如停止从配置的候选小区中尝试确定目标小区的流程，并根据该第一消息，执行到第一消息中指示的目标小区的传统切换。所述传统切换(legacy handover)又可称为切换(handover)，普通切换，一般切换等，或者具有其他名称，不作限定。
步骤S803、如果执行的传统切换发生失败，终端设备根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区。
在该实施例中，终端设备当前的位置可以是指终端设备执行的传统切换发生失败时，或者说终端设备在传统切换的目标小区发生接入或切换失败时的位置，该终端设备当前的位置可以是地理位置，如经纬度数值，也可以是相对位置，如终端设备与卫星之间的距离，并不限定。相应的，当前时间可以是指终端设备执行的传统切换发生失败，或者说终端设备在传统切换的目标小区发生接入或切换失败时的时刻。当前的信号质量可以是指终端设备执行的传统切换发生失败，或者说终端设备在传统切换的目标小区发生接入或切换失败时，各个候选小区和源小区和其他小区中的一个或多个小区的信号质量。
具体的，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息中的一个CHO配置信息相匹配，则终端设备可确定第一小区为匹配的第一CHO配置信息对应的第一候选小区，进而终端设备可按照第一CHO配置信息接入该第一 小区。
如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息中的多个CHO配置信息相匹配，则终端设备可从匹配的所述多个CHO配置信息对应的候选小区中选择一个候选小区作为第一小区，进而按照对应的CHO配置信息接入该第一小区。应注意，在该情形下，终端设备选择哪个候选小区作为第一小区，或者说终端设备选择接入哪个候选小区，可以基于终端设备实现，本申请并不限定。示例性地，终端设备可根据所述多个CHO配置信息分别对应的候选小区的信号质量，从所述多个CHO配置信息中确定第一CHO配置信息，并确定第一小区为第一CHO配置信息对应的第一候选小区，进而按照该第一CHO配置信息接入第一小区。可选的，该第一CHO配置信息对应的第一候选小区可以是所述N个CHO配置信息对应的候选小区中信号质量最好的一个候选小区，所述信号质量可以是RSRP、RSRQ、SINR中的一项或多项，也可以包含其他参数，并不限定。
可选的，第一CHO配置信息中可包括第一候选小区的相关信息，终端设备可使用该第一候选小区的相关信息，接入该第一候选小区。关于候选小区的相关信息的具体内容可参考上文中的描述，不再赘述。
如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，但是终端设备当前的位置在源小区的小区范围内，则终端设备可确定第一小区为源小区，进而在该源小区进行重建立，也就是说，在该情形下终端设备可以回退到源小区。
如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，而且终端设备当前的位置也不在源小区的小区范围内，则终端设备可确定第一小区不是候选小区，也不是源小区。终端设备可以将所述N个CHO配置信息对应的候选小区以及源小区之外的其他小区确定为第一小区，并在该第一小区进行重建立。
关于终端设备当前的位置和/或当前时间和/或当前的信号质量与CHO配置信息相匹配的含义，以及判断终端设备当前的位置和/或当前时间和/或当前的信号质量是否与某个CHO配置信息相匹配的方式可参考上文中的相关描述，在此不再重复。
根据上述内容可知，在该实施例中，在该实施例中，当终端设备在所述N个CHO配置信息指示的CHO执行条件满足前，又接收到了来自源网络设备的指示传统切换的第一消息，但执行的传统切换发生失败时，或者说与第一消息中指示的目标小区发生接入或切换失败时，终端设备可根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，来选择要接入的小区，该要接入的小区也可以理解为恢复连接的小区，或者重建立的小区等。如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息中的一个或多个CHO配置信息相匹配，则终端设备可选择源网络设备为其配置的某个候选小区接入。具体的，终端设备可选择与其匹配的一个或多个CHO配置信息中的第一CHO配置信息对应的第一候选小区作为第一小区，并根据该第一CHO配置信息中的该第一候选小区的相关信息，如该第一候选小区为终端设备分配的C-RNTI、接入该第一候选小区所需的RACH资源信息等，接入该第一候选小区。关于选择第一CHO配置信息或第一候选小区的方式，本申请不作具体限定。
如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，但终端设备当前的位置在源小区的小区范围内，则终端设备可以回退到源小 区，在源小区进行重建立。也就是说，在该情形下，第一小区为源小区，终端设备可以选择接入源小区。
如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，且终端设备当前的位置也不在源小区的小区范围内，则在该情形下，第一小区既不是候选小区，也不是源小区，终端设备可将其他小区(即非候选小区、非源小区)确定为要接入的第一小区，并在该第一小区进行重建立。
由此可知，上述技术方案提供了一种在CHO执行条件为基于位置信息和/或时间信息和/或信号质量信息的CHO执行条件的场景下，当终端设备在CHO执行条件满足前，又接收到来自源网络设备指示进行传统切换的第一消息，但执行的传统切换发生失败时的CHO失败处理机制。终端设备可根据传统切换发生失败时的位置、时间、信号质量以及CHO配置信息确定要接入的小区，从而使得终端设备在发生传统切换失败后能进行合理的处理，减少由于切换失败造成的中断时延，提高系统性能。
在一个具体示例中，源网络设备可以为终端设备提供三个CHO配置信息，分别为CHO配置信息E、CHO配置信息F和CHO配置信息G。具体的，CHO配置信息E中包括定时器信息E和相关信息E，其中，定时器信息E用于指示该CHO配置信息E对应的候选小区E的CHO执行条件，例如定时器信息E可以为定时器E(即timer1)的有效时长，表示当该定时器E的有效时长到达时，定时器E被触发，候选小区E的CHO执行条件满足，终端设备可以尝试接入该候选小区E；相关信息E用于指示该CHO配置信息E对应的候选小区E的相关信息，如候选小区E为终端设备分配的C-RNTI、接入候选小区E所需的RACH资源信息等。CHO配置信息F中包括定时器信息F和相关信息F，其中，定时器信息F用于指示该CHO配置信息F对应的候选小区F的CHO执行条件，例如，该定时器信息F可以为定时器F(timer2)的有效时长，表示当定时器F的有效时长到达时，定时器F被触发，候选小区F的CHO执行条件满足，终端设备可以尝试接入该候选小区F；相关信息F用于指示该CHO配置信息F对应的候选小区F的相关信息。CHO配置信息G中包括定时器信息G和相关信息G，其中，定时器信息G用于指示该CHO配置信息G对应的候选小区G的CHO执行条件，例如，该定时器信息G可以为定时器G(即timer3)的有效时长，表示当定时器G的有效时长到达时，定时器G被触发，候选小区G的CHO执行条件满足，终端设备可以尝试接入该候选小区G；相关信息G用于指示该CHO配置信息G对应的候选小区G的相关信息。如此，终端设备在接收到上述CHO配置信息E、CHO配置信息F和CHO配置信息G之后，可启动定时器E、定时器F、定时器G。在定时器E、定时器F、定时器G的有效时长均未到达时，如果终端设备又接收到了来自源网络设备的传统切换消息，指示终端设备切换到另一小区H，则终端设备可以停止CHO流程，并执行到该小区H的传统切换。如果终端设备执行的到该小区H的传统切换发生失败，则进一步地如果终端设备此时位于候选小区F的小区范围内，则终端设备可采用相关信息F接入候选小区F。如果终端设备此时不在候选小区E的小区范围内，也不在候选小区F的小区范围内，也不在候选小区G的小区范围内，但是在源小区的小区范围内，则终端设备可以回退到源小区。如果终端设备此时不在候选小区E的小区范围内，也不在候选小区F的小区范围内，也不在候选小区G的小区范围内，而且也不在源小区的小区范围内，则终端设备可以在其他小区进行重建立。
可选的，终端设备在传统切换发生失败之后，还可以记录切换失败的相关信息，生成 第三报告，并向第一网络设备上报该第三报告。该第三报告中可包括下列信息中的一项或多项：
1)、failedPcellID：接入失败小区的小区信息，或者说终端设备接入或切换失败的小区的小区信息，即传统切换的目标小区的小区信息。
2)、connectionFailureType：连接失败类型，如HOF。
3)、previousPCellId：源小区的小区信息。
4)、接入失败后恢复连接的小区信息，即在执行的到目标小区的传统切换发生失败后，终端设备接入的第一小区的小区信息。
5)、源小区分配给终端设备的C-RNTI，和/或，接入失败小区为终端设备分配的C-RNTI，所述接入失败小区即为传统切换的目标小区。
6)、定时器信息和/或信号质量阈值。可选的，所述CHO执行条件信息可以包括定时器信息和/或信道质量信息。当CHO执行条件信息包括定时器信息时，所述定时器信息具体是指所述N个CHO配置信息中包括的各个候选小区的定时器信息中的一个或多个，即各个候选小区对应的定时器的有效时长。当CHO执行条件信息包括信号质量信息时，所述信号质量阈值具体是指所述N个CHO配置信息中包括的各个候选小区的CHO执行事件对应的阈值。
7)、接收到CHO配置信息到接收到第一消息(即传统切换消息)的时间段信息。
8)、接收到第一消息(即传统切换消息)到传统切换发生失败的时间段信息。
9)、传统切换发生失败到连接恢复的时间段信息。
9)、连接恢复到上报第三报告的时间段信息，和/或，传统切换发生失败到上报第三报告的时间段信息。
10)、接入失败时的时间信息，如传统切换发生失败时的绝对时间值(如UTC时间)。
11)、接入失败时终端设备的位置信息，例如可以是传统切换发生失败时终端设备的绝对位置(如经纬度数值)，或相对位置(如终端设备与卫星之间的距离)。
12)、源小区和/或接入失败小区(即传统切换的目标小区)和/或各个候选小区各自的信号质量。例如可以是终端设备接收到CHO配置信息时，和/或，接收到第一消息时，和/或，执行传统切换时，和/或，执行的传统切换发生失败时，和/或，连接恢复时，和/或，上报该第三报告时，源小区和/或接入失败小区和/或各个候选小区各自的信号质量。
需要说明的是，所述第一网络设备可以是源小区所属的网络设备(即源网络设备)，也可以是连接失败小区所属的网络设备(即传统切换的目标网络设备)，也可以是恢复连接的小区或重建立的小区或成功接入的小区所属的网络设备(即第一小区所属的网络设备)，或者还可以是其他网络设备，并不限定。
具体的，终端设备向第一网络设备上报第三报告的过程可参考上文中对第一报告、第二报告的相关描述，不再赘述。
可选的，如果第一网络设备不是源网络设备，则第一网络设备接收到该第三报告后，还可将该第三报告中的部分或全部信息发送给源网络设备。进一步地，源网络设备接收到该第三报告中的部分或全部信息后，可根据接收到的该第三报告中的部分或全部信息，进行相应切换参数的调整。可选的，源网络设备还可以将接收到的该第三报告中的部分或全部信息的部分或全部发送给传统切换的目标网络设备或重建立网络设备，进而目标网络设备或重建立网络设备接收到这些信息后，可以根据接收到的信息进行相应切换参数的调整。
可选的，如果第一网络设备不是传统切换的目标网络设备，则第一网络设备接收到该第一报告后，还可将该第一报告中的部分或全部信息发送给目标网络设备。进一步地，目标网络设备接收到该第一报告中的部分或全部信息后，可根据接收到的该第一报告中的部分或全部信息，进行相应切换参数的调整。可选的，目标网络设备还可以将接收到的第一报告中的部分或全部信息的部分或全部发送给源网络设备或重建立网络设备，进而源网络设备或重建立网络设备接收到这些信息后，可根据接收到的信息进行相应切换参数的调整。
可选的，如果终端设备执行的传统切换成功，即终端设备成功接入传统切换的目标小区后，终端设备还可记录切换成功的相关信息，生成第五报告，并向第一网络设备上报该第五报告。该第五报告中可包括下列信息中的一项或多项：
1)、successfulPcellID：接入成功小区的小区信息，或者说终端设备接入成功的小区的小区信息，即传统切换的目标小区的小区信息。
2)、connectionSuccessType：连接成功类型，如HO success。
3)、previousPCellId：源小区的小区信息。
4)、源小区分配给终端设备的C-RNTI，和/或，接入成功小区(即传统切换的目标小区)为终端设备分配的C-RNTI。
5)、接入成功时的时间信息，如接入成功时的绝对时间值(如UTC时间)，或者相对时间值(如接收到第一消息到接入成功的时间段信息)。
6)、接收到CHO配置信息到接收到第一消息的时间段信息。
7)、接入成功到上报第五报告的时间段信息。
8)、接入成功时终端设备的位置信息。例如可以是终端设备的绝对位置(如经纬度数值)，或相对位置(如终端设备与卫星之间的距离)。
类似的，在该场景下，所述第一网络设备可以是源小区所属的网络设备(即源网络设备)，也可以是接入成功小区所属的网络设备(即传统切换的目标网络设备)，或者还可以是其他网络设备，并不限定。
具体的，终端设备向第一网络设备上报第五报告的过程可参考上文中对第一报告、第二报告、第三报告、第四报告的相关描述，不再赘述。
可选的，如果第一网络设备不是源网络设备，则第一网络设备接收到该第五报告后，还可将该第五报告中的部分或全部信息发送给源网络设备。进一步地，源网络设备接收到该第五报告中的部分或全部信息后，可根据接收到的该第五报告中的部分或全部信息，进行相应切换参数的调整。可选的，源网络设备还可以将接收到的该第五报告中的部分或全部信息的部分或全部发送给目标网络设备，进而目标网络设备接收到这些信息后，可以根据接收到的信息进行相应切换参数的调整。
可选的，如果第一网络设备不是目标网络设备，则第一网络设备接收到该第五报告后，还可将该第五报告中的部分或全部信息发送给目标网络设备。进一步地，目标网络设备接收到该第五报告中的部分或全部信息后，可根据接收到的该第五报告中的部分或全部信息，进行相应切换参数的调整。可选的，标网络设备还可以将接收到的第一报告中的部分或全部信息的部分或全部发送给源网络设备，进而源网络设备接收到这些信息后，可根据接收到的信息进行相应切换参数的调整。
本申请实施例提供的通信方法，分别适用于三种不同的切换失败的场景中。三种切换 失败场景分别为：在CHO执行条件满足前与源小区发生无线链路失败、在CHO执行条件满足后与候选小区发生接入或切换失败，在CHO执行条件满足前接收到传统切换消息但执行的传统切换发生失败。
针对上述各种切换失败的场景，第一网络设备接收到终端设备上报的信息后(为描述方便，假设终端设备向第一网络设备发送RLF报告)，可以将从终端设备接收到的部分或全部信息转发给源网络设备或目标网络设备或候选小区所属的网络设备。当该第一网络设备与源网络设备或目标网络设备或候选小区所属的网络设备之间存在直接连接的通信接口(如X2/Xn接口)时，这些信息可以通过X2/Xn接口进行转发。当该第一网络设备与源网络设备或目标网络设备或候选小区所属的网络设备之间没有直接连接的通信接口时，这些信息可以通过核心网设备(如AMF)转发。即，第一网络设备可以通过与核心网设备之间的通信接口向核心网设备发送RLF report或该RLF report中包含的部分或全部信息。
具体地，第一网络设备通过S1或NG接口向核心网设备发送RLF report或该RLF report中包含的部分或全部信息，由核心网设备向源网络设备或目标网络设备或候选小区所属的网络设备转发从第一网络设备接收到的信息。一种示例，第一网络设备可以通过S1/NG接口上的以下消息的至少一种向源网络设备或目标网络设备或候选小区所属的网络设备发送RLF report或该RLF report中包含的部分或全部信息：上行RAN配置传输(UPLINK RAN CONFIGURATION TRANSFER)消息、下行RAN配置传输(DOWNLINK RAN CONFIGURATION TRANSFER)消息、基站配置传输(eNB CONFIGURATION TRANSFER或gNB CONFIGURATION TRANSFER)消息、核心网设备配置传输(MME CONFIGURATION TRANSFER或AMF CONFIGURATION TRANSFER)消息或其它消息。
另外，本申请实施例中，当源网络设备与目标网络设备之间，或者，源网络设备与候选小区所属的网络设备之间，或者，目标网络设备与候选小区所属的网络设备之间，无法直接通过X2/Xn接口通信时，也可以通过核心网设备传递信息。例如，目标网络设备可以通过自身和核心网设备间的接口(如S1或NG接口)向核心网设备发送，该目标网络设备从第一网络设备接收到的信息中的部分或全部信息，然后核心网设备通过S1或NG接口向源网络设备转发从目标网络设备接收到的信息中的部分或全部信息。
若终端设备/第一网络设备/源网络设备/目标网络设备/候选小区所属的网络设备为包括CU节点和DU节点的分离式的形态，则作为消息/信息接收方的CU节点可以将接收到的信息中的部分或全部信息发送给DU节点。可选的，若CU节点可以进一步划分为控制面(CU-CP)和用户面(CU-UP)，则作为消息/信息接收方的CU-CP节点可以将接收到的信息中的部分或全部信息发送给CU-UP节点。其中，CU节点、DU节点、CU-CP节点、CU-UP节点可以是终端设备对应的，或者是第一网络设备对应的，或者是源网络设备对应的，或者是目标网络设备对应的，或者是候选小区所属的网络设备对应的。
应注意，上述节点间的发送过程可适用于本申请实施例中的任一CHO失败场景。例如，以终端设备向第一网络设备发送RLF报告为例，若第一网络设备为包括CU节点和DU节点的分离式的形态，则第一网络设备的CU节点可以从终端设备接收RLF报告。可选的，该CU节点还可将接收到的RLF报告中包括的部分或全部信息发送给DU节点。可选的，若CU节点可以划分为控制面(CU-CP)和用户面(CU-UP)，则CU-CP节点又可将接收到的RLF报告中包括的部分或全部信息发送给CU-UP节点。
本申请实施例还提供一种通信装置，请参考图9，为本申请实施例提供的一种通信装置的结构示意图，该通信装置900包括：收发模块910和处理模块920。
在一个实施例中，该通信装置可用于实现上述任一方法实施例中涉及终端设备的功能。例如，该通信装置可以是终端设备，例如手持终端设备或车载终端设备；该通信装置还可以是终端设备中包括的芯片或者电路，或者包括终端设备的装置，如各种类型的车辆等。
示例性的，当该通信装置执行图5中所示的方法实施例中对应终端设备的操作或者步骤时，收发模块910用于，接收来自源网络设备的N个条件切换CHO配置信息，每个CHO配置信息指示该CHO配置信息对应的候选小区的CHO执行条件，所述CHO执行条件为基于位置信息和/或时间信息和/或信号质量信息的CHO执行条件，N为大于1的整数；处理模块920用于，在所述N个CHO配置信息中的任一CHO配置信息指示的CHO执行条件满足前，在源小区发生无线链路失败；处理模块920还用于，根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区。
在一种可能的设计中，处理模块920具体用于，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息中的第一CHO配置信息相匹配，则确定第一小区为该第一CHO配置信息对应的第一候选小区，进而按照第一CHO配置信息，接入该第一小区。
在一种可能的设计中，处理模块920具体用于，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，则可确定第一小区不是候选小区，进而在该第一小区进行重建立。
在一种可能的设计中，处理模块920还用于，在源小区发生无线链路失败之后，生成第一报告，收发模块910还用于，向第一网络设备上报该第一报告；其中，该第一报告中包括下列信息中的一项或多项：接入失败小区的小区信息、连接失败类型、源小区的小区信息、发生无线链路失败后恢复连接的小区信息、源小区为终端设备分配的C-RNTI、发生无线链路失败时的时间信息、发生无线链路失败到连接恢复的时间段信息、发生无线链路失败到上报第一报告的时间段信息、连接恢复到上报第一报告的时间段信息、发生无线链路失败时终端设备的位置信息、源小区和/或各个候选小区各自的信号质量。
当该通信装置执行图7中所示的方法实施例中对应终端设备的操作或者步骤时，收发模块910用于，接收来自源网络设备的N个条件切换CHO配置信息，每个CHO配置信息指示该CHO配置信息对应的候选小区的CHO执行条件，所述CHO执行条件为基于位置信息和/或时间信息和/或信号质量的CHO执行条件，N为大于1的整数；处理模块920用于，在所述N个CHO配置信息中的第二CHO配置信息指示的CHO执行条件满足后，执行到该第二CHO配置信息对应的第二候选小区的切换；处理模块920还用于，如果在该第二候选小区发生接入或切换失败，则可根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区。
在一种可能的设计中，处理模块920具体用于，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息中的第一CHO配置信息相匹配，则确定第一小区为该第一CHO配置信息对应的第一候选小区，进而按照第一CHO配置信息，接入该第一小区，即第一候选小区。
在一种可能的设计中，处理模块920具体用于，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，且终端设备当前的位置在源 小区的小区范围内，则确定第一小区为源小区，进而在源小区进行重建立。
在一种可能的设计中，处理模块920具体用于，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，且终端设备当前的位置不在源小区的小区范围内，则确定第一小区不是候选小区，也不是源小区，进而在确定的该第一小区进行重建立。
在一种可能的设计中，处理模块920还用于，如果终端设备在第二候选小区发生接入或切换失败，则生成第二报告；收发模块910还用于，向第一网络设备上报该第二报告，其中，该第二报告中包括下列信息中的一项或多项：接入失败小区的小区信息、接收到所述第二CHO配置信息到切换触发的时间段信息、切换触发到接入失败的时间段信息、接入失败到连接恢复的时间段信息、连接恢复到上报所述第二报告的时间段信息、接入失败到上报所述第二报告的时间段信息、接入失败时的时间信息、接入失败时所述终端设备的位置信息、所述源小区和/或各个候选小区各自的信号质量。
当该通信装置执行图8中所示的方法实施例中对应终端设备的操作或者步骤时，收发模块910用于，接收来自源网络设备的N个条件切换CHO配置信息，每个CHO配置信息指示该CHO配置信息对应的候选小区的CHO执行条件，所述CHO执行条件为基于位置信息和/或时间信息和/或信号质量的CHO执行条件，N为大于1的整数；收发模块910用于，在所述N个CHO配置信息中存在任一CHO配置信息指示的CHO执行条件满足前，接收到来自源网络设备的第一消息，该第一消息指示执行传统切换；处理模块920用于，如果执行的传统切换发生失败，则根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区。
在一种可能的设计中，处理模块920还用于，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息中的一个CHO配置信息相匹配，则确定第一小区为所述第一CHO配置信息对应的第一候选小区；进而按照该第一CHO配置信息，接入该第一小区，即第一候选小区。
在一种可能的设计中，处理模块920还用于，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，且终端设备当前的位置在源小区的小区范围内，则确定第一小区为源小区，进而在源小区进行重建立。
在一种可能的设计中，处理模块920还用于，如果终端设备当前的位置和/或当前时间和/或当前的信号质量与所述N个CHO配置信息都不匹配，且终端设备当前的位置不在源小区的小区范围内，则确定第一小区不是候选小区，也不是源小区，在确定的第一小区进行重建立。
在一种可能的设计中，处理模块920还用于，如果终端设备执行的传统切换发生失败，则生成第三报告，收发模块910还用于，向第一网络设备上报该第三报告，其中，该第三报告中包括下列信息中的一项或多项：接收到CHO配置信息到接收到第一消息的时间段信息、接收到第一消息到传统切换发生失败的时间段信息、传统切换发生失败到连接恢复的时间段信息、连接恢复到上报第三报告的时间段信息、传统切换发生失败到上报第三报告的时间段信息、传统切换发生失败时的时间信息、传统切换发生失败时终端设备的位置信息、源小区和/或各个候选小区各自的信号质量。
该通信装置中涉及的处理模块920可以由至少一个处理器或处理器相关电路组件实现，收发模块910可以由至少一个收发器或收发器相关电路组件或通信接口实现。该通信装置 中的各个模块的操作和/或功能分别为了实现图5、图6、图7或图8中所示方法的相应流程，为了简洁，在此不再赘述。可选的，该通信装置中还可以包括存储模块，该存储模块可以用于存储数据和/或指令，收发模块910和/或处理模块920可以读取存取模块中的数据和/或指令，从而使得通信装置实现相应的方法。该存储模块例如可以通过至少一个存储器实现。
上述存储模块、处理模块和收发模块可以分离存在，也可以全部或者部分模块集成，例如存储模块和处理模块集成，或者处理模块和收发模块集成等。
请参考图10，为本申请实施例中提供的一种通信装置的另一结构示意图。该通信装置可用于实现上述方法实施例中终端设备对应的功能，例如可以是终端设备或者能够支持终端设备实现上述方法实施例中对应功能的装置。
该通信装置可以包括处理器1001、通信接口1002和存储器1003。其中，通信接口1002用于通过传输介质与其它设备进行通信，该通信接口1002可以是收发器、也可以为接口电路如收发电路、收发芯片等。存储器1003用于存储程序指令和/或数据，处理器1001用于执行存储器1003中存储的程序指令，从而实现上述方法实施例中的方法。可选的，存储器1003和处理器1001耦合，所述耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。
在一个实施例中，通信接口1002可具体用于执行上述收发模块910的动作，处理器1001可具体用于执行上述处理模块920的动作，本申请在此不再赘述。
本申请实施例中不限定上述通信接口1002、处理器1001以及存储器1003之间的具体连接介质。本申请实施例在图10中以存储器1003、处理器1001以及通信接口1002之间通过总线1004连接，总线在图10中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图10中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
请参考图11，示出了一种简化的通信装置的结构示意图，该通信装置具体可为一种终端设备，用于实现上述任一方法实施例中涉及终端设备的功能。便于理解和图示方便，在图11中，将终端设备以手机作为例子。如图11所示，终端设备包括处理器，还可以包括存储器，当然，也还可以包括射频电路、天线以及输入输出装置等。处理器主要用于对通信协议以及通信数据进行处理，以及对终端设备进行控制，执行软件程序，处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是，有些种类的终端设备可以不具有输入输出装置。
当需要发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。为便于说明，图11中仅示出了一个存储器和处理器。在实际的终端设备产品中，可以存在一个或多个处理器和一个或多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以是独立于处理器设置，也可以是与处理器集成在一起，本申请实施例对此不做限制。
在本申请实施例中，可以将具有收发功能的天线和射频电路视为终端设备的收发单元，将具有处理功能的处理器视为终端设备的处理单元。如图11所示，终端设备包括收发单元1110和处理单元1120。收发单元也可以称为收发器、收发机、收发装置等。处理单元也可以称为处理器，处理单板，处理模块、处理装置等。可选的，可以将收发单元1110中用于实现接收功能的器件视为接收单元，将收发单元1110中用于实现发送功能的器件视为发送单元，即收发单元1110包括接收单元和发送单元。收发单元有时也可以称为收发机、收发器、或收发电路等。接收单元有时也可以称为接收机、接收器、或接收电路等。发送单元有时也可以称为发射机、发射器或者发射电路等。应理解，收发单元1110用于执行上述方法实施例中终端设备侧的发送操作和接收操作，处理单元1120用于执行上述方法实施例中终端设备上除了收发操作之外的其他操作。
本申请实施例还提供一种芯片系统，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得该芯片系统实现上述任一方法实施例中的对应终端设备的方法或者对应网络设备(如源网络设备或目标网络设备)的方法。
可选地，该芯片系统中的处理器可以为一个或多个。该处理器可以通过硬件实现也可以通过软件实现。当通过硬件实现时，该处理器可以是逻辑电路、集成电路等。当通过软件实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现。
可选地，该芯片系统中的存储器也可以为一个或多个。该存储器可以与处理器集成在一起，也可以和处理器分离设置，本申请并不限定。示例性的，存储器可以是非瞬时性处理器，例如只读存储器ROM，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本申请对存储器的类型，以及存储器与处理器的设置方式不作具体限定。
示例性的，该芯片系统可以是现场可编程门阵列(field programmable gate array，FPGA)，可以是专用集成芯片(application specific integrated circuit，ASIC)，还可以是系统芯片(system on chip，SoC)，还可以是中央处理器(central processor unit，CPU)，还可以是网络处理器(network processor，NP)，还可以是数字信号处理电路(digital signal processor，DSP)，还可以是微控制器(micro controller unit，MCU)，还可以是可编程控制器(programmable logic device，PLD)或其他集成芯片。
应理解，上述方法实施例中的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
本申请实施例还提供一种计算机可读存储介质，所述计算机存储介质中存储有计算机可读指令，当计算机读取并执行所述计算机可读指令时，使得计算机执行上述任一方法实施例中的方法。
本申请实施例还提供一种计算机程序产品，当计算机读取并执行所述计算机程序产品时，使得计算机执行上述任一方法实施例中的方法。
本申请实施例还提供一种通信系统，该通信系统包括源网络设备和终端设备。可选的，该通信系统中还可包括至少一个候选目标网络设备。可选的，该通信系统中还可以包括第一网络设备，该第一网络设备可以是源网络设备或目标网络设备或重建立小区(即恢复连接的小区)所属的网络设备或其他网络设备。可选的，该通信系统中还可以包括核心网设备。
应理解，本申请实施例中提及的处理器可以是CPU，还可以是其他通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中提及的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)集成在处理器中。
应注意，本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，在本申请的各种实施例中涉及的各种数字编号仅为描述方便进行的区分，上述各过程或步骤的序号的大小并不意味着执行顺序的先后，各过程或步骤的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现 有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
在本申请的各个实施例中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。

Claims (19)

  1. 一种通信方法，其特征在于，所述方法包括：
    接收来自源网络设备的N个条件切换CHO配置信息，每个CHO配置信息指示该CHO配置信息对应的候选小区的CHO执行条件，所述CHO执行条件为基于位置信息和/或时间信息和/或信号质量信息的CHO执行条件，N为大于1的整数；
    在所述N个CHO配置信息中的任一CHO配置信息指示的CHO执行条件满足前，在源小区发生无线链路失败；
    根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区。
  2. 根据权利要求1所述的方法，其特征在于，所述根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区，包括：
    如果所述终端设备当前的位置和/或所述当前时间和/或所述当前的信号质量与所述N个CHO配置信息中的第一CHO配置信息相匹配，则确定所述第一小区为所述第一CHO配置信息对应的第一候选小区；
    所述方法还包括：按照所述第一CHO配置信息，接入所述第一小区。
  3. 根据权利要求1或2所述的方法，其特征在于，如果所述终端设备当前的位置和/或所述当前时间和/或所述当前的信号质量与所述N个CHO配置信息都不匹配，则确定所述第一小区不是候选小区；
    所述方法还包括：在所述第一小区进行重建立。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，所述在源小区发生无线链路失败之后，所述方法还包括：
    生成第一报告，所述第一报告中包括下列信息中的一项或多项：接入失败小区的小区信息、连接失败类型、源小区的小区信息、发生无线链路失败后恢复连接的小区信息、源小区为终端设备分配的C-RNTI、发生无线链路失败时的时间信息、发生无线链路失败到连接恢复的时间段信息、发生无线链路失败到上报第一报告的时间段信息、连接恢复到上报第一报告的时间段信息、发生无线链路失败时终端设备的位置信息、源小区和/或各个候选小区各自的信号质量；
    向第一网络设备上报所述第一报告。
  5. 一种通信方法，其特征在于，所述方法包括：
    接收来自源网络设备的N个条件切换CHO配置信息，每个CHO配置信息指示该CHO配置信息对应的候选小区的CHO执行条件，所述CHO执行条件为基于位置信息和/或时间信息和/或信号质量的CHO执行条件，N为大于1的整数；
    在所述N个CHO配置信息中的第二CHO配置信息指示的CHO执行条件满足后，执行到所述第二CHO配置信息对应的第二候选小区的切换；
    如果在所述第二候选小区发生接入或切换失败，则根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区。
  6. 根据权利要求5所述的方法，其特征在于，所述根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区，包括：
    如果所述终端设备当前的位置和/或所述当前时间和/或所述当前的信号质量与所述N个CHO配置信息中的第一CHO配置信息相匹配，则确定所述第一小区为所述第一CHO 配置信息对应的第一候选小区；
    所述方法还包括：按照所述第一CHO配置信息，接入所述第一小区。
  7. 根据权利要求5或6所述的方法，其特征在于，所述根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区，包括：
    如果所述终端设备当前的位置和/或所述当前时间和/或所述当前的信号质量与所述N个CHO配置信息都不匹配，且所述终端设备当前的位置在源小区的小区范围内，则确定所述第一小区为所述源小区；
    所述方法还包括：在所述源小区进行重建立。
  8. 根据权利要求5至7中任一项所述的方法，其特征在于，所述根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区，包括：
    如果所述终端设备当前的位置和/或所述当前时间和/或所述当前的信号质量与所述N个CHO配置信息都不匹配，且所述终端设备当前的位置不在源小区的小区范围内，则确定所述第一小区不是候选小区，也不是所述源小区；
    所述方法还包括：在所述第一小区进行重建立。
  9. 根据权利要求5至8中任一项所述的方法，其特征在于，如果在所述第二候选小区发生接入或切换失败，所述方法还包括：
    生成第二报告，所述第二报告中包括下列信息中的一项或多项：接入失败小区的小区信息、接收到所述第二CHO配置信息到切换触发的时间段信息、切换触发到接入失败的时间段信息、接入失败到连接恢复的时间段信息、连接恢复到上报所述第二报告的时间段信息、接入失败到上报所述第二报告的时间段信息、接入失败时的时间信息、接入失败时所述终端设备的位置信息、所述源小区和/或各个候选小区各自的信号质量；
    向第一网络设备上报所述第二报告。
  10. 一种通信方法，其特征在于，所述方法包括：
    接收来自源网络设备的N个条件切换CHO配置信息，每个CHO配置信息指示该CHO配置信息对应的候选小区的CHO执行条件，所述CHO执行条件为基于位置信息和/或时间信息和/或信号质量的CHO执行条件，N为大于1的整数；
    在所述N个CHO配置信息中存在任一CHO配置信息指示的CHO执行条件满足前，接收到来自所述源网络设备的第一消息，所述第一消息指示执行传统切换；
    如果执行的传统切换发生失败，则根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区。
  11. 根据权利要求10所述的方法，其特征在于，所述根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区，包括：
    如果所述终端设备当前的位置和/或所述当前时间和/或所述当前的信号质量与所述N个CHO配置信息中的第一CHO配置信息相匹配，则确定所述第一小区为所述第一CHO配置信息对应的第一候选小区；
    所述方法还包括：按照所述第一CHO配置信息，接入所述第一候选小区。
  12. 根据权利要求10或11所述的方法，其特征在于，所述根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区，包括：
    如果所述终端设备当前的位置和/或所述当前时间和/或所述当前的信号质量与所述N个CHO配置信息都不匹配，且所述终端设备当前的位置在源小区的小区范围内，则确定所述第一小区为所述源小区；
    所述方法还包括：在所述源小区进行重建立。
  13. 根据权利要求10至12中任一项所述的方法，其特征在于，所述根据所述N个CHO配置信息、终端设备当前的位置和/或当前时间和/或当前的信号质量，确定要接入的第一小区，包括：
    如果所述终端设备当前的位置和/或所述当前时间和/或所述当前的信号质量与所述N个CHO配置信息都不匹配，且所述终端设备当前的位置不在源小区的小区范围内，则确定所述第一小区不是候选小区，也不是所述源小区；
    所述方法还包括：在所述第一小区进行重建立。
  14. 根据权利要求10至13中任一项所述的方法，其特征在于，如果执行的传统切换发生失败，所述方法还包括：
    生成第三报告，所述第三报告中包括下列信息中的一项或多项：接收到所述CHO配置信息到接收到所述第一消息的时间段信息、接收到所述第一消息到传统切换发生失败的时间段信息、传统切换发生失败到连接恢复的时间段信息、连接恢复到上报所述第三报告的时间段信息、传统切换发生失败到上报所述第三报告的时间段信息、传统切换发生失败时的时间信息、传统切换发生失败时所述终端设备的位置信息、所述源小区和/或各个候选小区各自的信号质量；
    向第一网络设备上报所述第三报告。
  15. 一种通信装置，其特征在于，所述装置包括用于执行如权利要求1至4中任一项所述的方法的各步骤的单元，或者包括用于执行如权利要求5至9中任一项所述的方法的各步骤的单元，或者包括用于执行如权利要求10至14中任一项所述的方法的各步骤的单元。
  16. 一种通信装置，其特征在于，所述装置包括至少一个处理器，所述至少一个处理器与至少一个存储器耦合：
    所述至少一个处理器，用于执行所述至少一个存储器中存储的计算机程序或指令，以使得所述装置执行如权利要求1至4中任一项所述的方法，或者使得所述装置执行如权利要求5至9中任一项所述的方法，或者使得所述装置执行如权利要求10至14中任一项所述的方法。
  17. 一种计算机可读存储介质，其特征在于，用于存储指令，当所述指令被执行时，使如权利要求1至4中任一项所述的方法被实现，或者使如权利要求5至9中任一项所述的方法被实现，或者使如权利要求10至14中任一项所述的方法被实现。
  18. 一种通信装置，其特征在于，包括处理器和接口电路；
    所述接口电路，用于交互代码指令至所述处理器；
    所述处理器用于运行所述代码指令以执行如权利要求1至4中任一项所述的方法，或者所述处理器用于运行所述代码指令以执行如权利要求5至9中任一项所述的方法，或者所述处理器用于运行所述代码指令以执行如权利要求10至14中任一项所述的方法。
  19. 一种计算机程序产品，其特征在于，当计算机读取并执行所述计算机程序产品时，使得计算机执行如权利要求1至4中任一项所述的方法，或者执行如权利要求5至9中任 一项所述的方法，或者执行如权利要求10至14中任一项所述的方法。
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WO2023011340A1 (zh) * 2021-08-02 2023-02-09 维沃移动通信有限公司 移动性管理方法、终端及网络侧设备
WO2023236869A1 (zh) * 2022-06-10 2023-12-14 华为技术有限公司 接入方法及通信装置
WO2024031210A1 (en) * 2022-08-08 2024-02-15 Apple Inc. Earth moving cell enhancements

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