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WO2021249244A1 - Procédé et dispositifs de communication - Google Patents

Procédé et dispositifs de communication Download PDF

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Publication number
WO2021249244A1
WO2021249244A1 PCT/CN2021/097698 CN2021097698W WO2021249244A1 WO 2021249244 A1 WO2021249244 A1 WO 2021249244A1 CN 2021097698 W CN2021097698 W CN 2021097698W WO 2021249244 A1 WO2021249244 A1 WO 2021249244A1
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WIPO (PCT)
Prior art keywords
terminal device
information
cell handover
network device
perform
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/097698
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English (en)
Chinese (zh)
Inventor
王洲
张健
刘云
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202010730139.7A external-priority patent/CN113810964B/zh
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2021249244A1 publication Critical patent/WO2021249244A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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

Definitions

  • This application relates to the field of communication technology, and in particular to a communication method and device.
  • Radio resource control radio resource control
  • the source base station Before cell handover is performed, there may be data transmission between the terminal device and the source base station, for example, the source base station has downlink data sent to the terminal device. After entering the cell handover process, the source base station sends the data that has not been sent to the terminal device to the target base station of the terminal device. After the cell handover is completed, the target base station sends these data to the terminal device. It can be seen that if the cell handover process is encountered, the data transmission delay is relatively large. The long transmission delay may lead to a higher packet loss rate. For more important data, if the packet loss rate is high, the terminal device may not be able to perform corresponding operations.
  • the embodiments of the present application provide a communication method and device, which are used to reduce the transmission delay of data to reduce the packet loss rate.
  • a first communication method which includes: sending first information to a terminal device, where the first information is used to inquire whether the terminal device can perform cell handover; When the terminal device can perform cell handover, it performs a cell handover operation.
  • the method may be executed by a first communication device, and the first communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip.
  • the first communication device is a network device, or a chip set in the network device for realizing the function of the network device, or other component used for realizing the function of the network device.
  • the first communication device is a network device, for example, a source network device serving a terminal device before a cell handover.
  • the source network device is an access network device, such as a base station.
  • the network device may send the first information to the terminal device. If the terminal device is determined to be able to perform cell handover based on the first information, the cell handover operation is performed again. For example, if the terminal device has data being transmitted, The cell handover may not be performed. In this way, try to perform the cell switching process after the data transmission is completed, thereby reducing the data transmission delay and further reducing the packet loss rate.
  • determining that the terminal device can perform cell handover according to the first information includes:
  • the terminal device sends second information to the source network device.
  • the second information indicates that the terminal device is capable of cell switching, and if the terminal device determines that cell switching is not possible, then The terminal device sends second information to the source network device, and the second information indicates that the terminal device cannot perform cell handover. That is, no matter whether the terminal device determines whether the cell handover can be performed, the terminal device will send the second information to the source network device, and the source network device can determine whether the terminal device can perform the cell handover according to the indication of the second information. This can make the instructions more clear.
  • determining that the terminal device can perform cell handover according to the first information includes:
  • the terminal device After receiving the second information from the terminal device in response to the first information, it is determined that the terminal device can perform cell handover.
  • the terminal device sends second information to the source network device.
  • the second information indicates that the terminal device is capable of cell switching, or the terminal device sends the second information event, It indicates that the terminal device can perform cell switching; and if the terminal device determines that cell switching cannot be performed, the terminal device does not send the second information to the source network device, and the event that the terminal device does not send the second information indicates that the terminal device cannot perform cell switching Or, the second information indicates that the terminal device can perform cell handover, and if the terminal device does not send the second information, it indicates that the terminal device cannot perform cell handover.
  • the terminal device only sends the second information to the source network device when it is determined that the cell handover can be performed, otherwise the second information will not be sent to the source network device. In this way, it is possible to save signaling overhead while providing a reminder to the source network device.
  • a cell handover operation is performed ,include:
  • the source network device may send the first information to the terminal device before sending the handover request message to the target network device. Then, if a cell handover needs to be performed, the source network device can perform a corresponding cell handover operation.
  • the above cell handover operation may only be part of the cell handover process.
  • the cell handover process of the terminal equipment may also involve other signaling, for example, the interaction between the access network equipment and the core network equipment, etc., which are all included in this section. Within the scope of the application embodiments, the embodiments of the application do not describe them one by one.
  • the method further includes:
  • the target network device After the source network device sends a switch request message to the target network device, the target network device is likely to not allow the terminal device to switch to the target network device. Therefore, in this implementation, the source network device is determining that the target network device allows the terminal device to switch In the case of the target network device, it is determined whether the terminal device can perform cell handover, thereby reducing invalid signaling interaction between the source network device and the terminal device, and saving signaling overhead.
  • performing a cell handover operation includes:
  • the source network device sends the first information to the terminal device when it is determined that the target network device allows the terminal device to switch to the target network device, then if the source network device determines that cell switching is possible, the source network device does not need to send the first information to the target network device.
  • the device sends a handover request message, but sends an RRC reconfiguration message to the terminal device.
  • the method further includes:
  • the cell handover operation is not performed.
  • the source network device determines that the cell handover cannot be performed, it may not be necessary to perform the cell handover. For example, if the terminal device has data being transmitted, the cell handover may not be performed. In this way, try to perform the cell switching process after the data transmission is completed, thereby reducing the data transmission delay and further reducing the packet loss rate.
  • determining that the terminal device cannot perform cell handover according to the first information includes:
  • the terminal device sends second information to the source network device.
  • the second information indicates that the terminal device is capable of cell switching, and if the terminal device determines that cell switching is not possible, then The terminal device sends second information to the source network device, and the second information indicates that the terminal device cannot perform cell handover. That is, no matter whether the terminal device determines whether the cell handover can be performed, the terminal device will send the second information to the source network device, and the source network device can determine whether the terminal device can perform the cell handover according to the indication of the second information. This can make the instructions more clear.
  • the second information further includes:
  • Suggested time information where the suggested time information is used to indicate the time when the terminal device can perform cell handover; and/or,
  • First reason information where the first reason information is used to indicate a reason why the terminal device cannot perform cell handover.
  • the terminal device sends the first reason information to the source network device, so that the source network device can clarify the reason why the terminal device cannot currently perform cell handover.
  • the suggested time information can indicate the time when the terminal device can perform cell handover, so that the source network device can initiate cell handover again at the time indicated by the suggested time information, or the source network device can also use the suggested time information and some other factors, Determine the time to initiate the cell handover again.
  • determining that the terminal device cannot perform cell handover according to the first information includes:
  • the terminal device sends second information to the source network device.
  • the second information indicates that the terminal device is capable of cell switching, or the terminal device sends the second information event, It indicates that the terminal device can perform cell switching; and if the terminal device determines that cell switching cannot be performed, the terminal device does not send the second information to the source network device, and the event that the terminal device does not send the second information indicates that the terminal device cannot perform cell switching Or, the second information indicates that the terminal device can perform cell handover, and if the terminal device does not send the second information, it indicates that the terminal device cannot perform cell handover.
  • the terminal device only sends the second information to the source network device when it is determined that the cell handover can be performed, otherwise the second information will not be sent to the source network device. In this way, it is possible to save signaling overhead while providing a reminder to the source network device.
  • a second communication method includes: receiving first information from a source network device, where the first information is used to inquire whether the terminal device can perform cell handover; when it is determined that the terminal device can perform cell handover; During handover, sending second information to the source network device to indicate that the terminal device can perform cell handover.
  • the method may be executed by a second communication device, and the second communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip.
  • the second communication device is a terminal device, or a chip set in the terminal device for realizing the function of the terminal device, or other component used for realizing the function of the terminal device.
  • the second communication device is a terminal device.
  • the second information is used to indicate that the terminal device can perform cell handover; or,
  • determining that the terminal device can perform cell handover includes:
  • the terminal device can perform cell handover based on no basic layer data to be received and to be sent, the basic layer data corresponds to the first service, and the basic layer data is data necessary for executing the first service.
  • one way for a terminal device to determine whether the terminal device can perform cell handover is that the terminal device can determine whether there is service data to be received or sent. If there is data to be received and/or data to be sent, the terminal device determines that it cannot Cell handover is performed, and if there is no data to be received and no data to be sent, the terminal device determines that the cell handover can be performed.
  • the importance level of the service data is higher than the first level (or, the priority is higher than the first level).
  • the terminal device determines that there is service data to be received or sent, and the importance level of the service data is higher than the first level, the terminal device determines that cell handover cannot be performed; or if the terminal device determines that there is a service to be received or sent Data, but the importance level of the service data is lower than or equal to the first level, the terminal device determines that it can perform cell handover; or, if the terminal device determines that there is no data to be received and no data to be sent, the terminal device determines that it can perform Cell handover.
  • the importance level is higher than the first level, which can indicate that the business data is more important data or data with higher priority.
  • the delay will be longer, which will lead to the packet loss rate. If it is higher, it may have a greater impact on the terminal device, for example, it may cause the terminal device to be unable to perform the service corresponding to the service data. Therefore, if the terminal device is to receive or send such service data before the cell handover, the terminal device can determine that the cell handover cannot be performed, so as not to perform the cell handover as much as possible. For example, the terminal device can continue to perform the transmission of the service data. Reduce the transmission delay of the service data, thereby reducing the packet loss rate.
  • the method further includes:
  • the second information further includes:
  • Suggested time information where the suggested time information is used to indicate the time when the terminal device can perform cell handover; and/or,
  • First reason information where the first reason information is used to indicate a reason why the terminal device cannot perform cell handover.
  • the method further includes:
  • the second information is not sent to the source network device, where the second information is used to indicate that the terminal device can perform cell handover.
  • determining that the terminal device cannot perform cell handover includes:
  • the basic layer data According to the basic layer data to be received or sent, it is determined that the terminal device cannot perform cell handover, the basic layer data corresponds to the first service, and the basic layer data is data necessary for executing the first service.
  • a third communication method includes: receiving second information from a terminal device; when the second information indicates that the terminal device cannot perform cell switching, not performing a cell switching operation.
  • the method may be executed by a third communication device, and the third communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip.
  • the third communication device is a network device, or a chip set in the network device for realizing the function of the network device, or other component used for realizing the function of the network device.
  • the third communication device is a network device, for example, a source network device serving the terminal device before a cell handover.
  • the source network device is an access network device, such as a base station.
  • the terminal device may send the second information to the source network device to indicate whether the terminal device can perform cell handover. If the second information indicates that the terminal device cannot perform cell handover, the source network device may not perform the cell handover operation.
  • the terminal device is more aware of the current situation of the terminal device, and the terminal device determines whether the cell handover can be performed, and the data transmission of the terminal device due to the cell handover can be avoided as much as possible, and the data transmission delay can be reduced.
  • the second information further includes:
  • Suggested time information where the suggested time information is used to indicate the time when the terminal device can perform cell handover; and/or,
  • First reason information where the first reason information is used to indicate a reason why the terminal device cannot perform cell handover.
  • the second information includes one or more of the following information:
  • the terminal device has high throughput information; or,
  • the terminal device has information about data to be sent and/or data to be received; or,
  • the terminal device has information on low power consumption requirements.
  • the second information may be existing information, and it can be understood that the second information may implicitly indicate whether the terminal device can perform cell handover.
  • the second information includes information that the terminal device has a high throughput rate.
  • the terminal device has a high throughput rate, indicating that the terminal device may have a large amount of data transmitting, and the second information can implicitly indicate that the terminal device cannot perform cell switching.
  • the second information includes information about data to be sent and/or to be received by the terminal device, and data to be sent and/or received by the terminal device, which can implicitly indicate that the terminal device cannot perform cell handover.
  • the second information includes information that the terminal device has low power consumption requirements, and cell switching needs to consume corresponding power.
  • the second information is equivalent to implicitly indicating that the terminal device cannot perform Cell handover.
  • the existing information is used to implicitly indicate that the terminal device cannot perform cell handover, without additional occupancy information to indicate, which helps to save signaling overhead.
  • the second information includes information that the terminal device has a high throughput rate, then the The second information is used to indicate that the MCS supported by the terminal device is higher than the MCS configured by the network device for the terminal device, or the second information is used to indicate the throughput rate supported by the terminal device, and the throughput The rate is greater than or equal to the first threshold.
  • the information that the terminal device has a high throughput rate can indicate the throughput rate supported by the terminal device, or it can indicate the MCS supported by the terminal device. If the terminal device supports a higher MCS, it is equivalent to indicating that the terminal device has a high throughput rate. Therefore, the terminal device has high throughput information, which can be throughput information or MCS information.
  • the second information includes data to be sent and/or data to be received by the terminal device , wherein the data is the basic layer data of the first service, and the basic layer data is the data necessary to execute the first service.
  • the data to be transmitted can be data of any priority (or any important level), that is, as long as the terminal device has data to be transmitted, the data is Think of it as data to be transmitted.
  • the data to be transmitted may also refer to data whose priority is higher than the first priority (or the importance level is higher than the first priority), that is, if the terminal device has a priority higher than the first priority If the data needs to be transmitted, the terminal device is considered to have data to be transmitted. Otherwise, if the terminal device has data to be transmitted, but the priority of the data is lower than or equal to the first priority, it is considered that the terminal device has no data to be transmitted.
  • the data to be transmitted is the basic layer data of the first service
  • the first service is, for example, the XR service.
  • the priority of the basic layer data of the XR service may be higher than the first priority
  • the priority of the enhanced layer data of the XR service may be lower than or equal to the first priority.
  • the method further includes:
  • the source network device may send the first information to the terminal device to trigger the terminal device to send the second information to the source network device.
  • the method further includes:
  • a fourth communication method includes: sending second information to a source network device; when the second information indicates that the terminal device cannot perform cell switching, the cell switching operation is not performed.
  • the method may be executed by a fourth communication device, and the fourth communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip.
  • the fourth communication device is a terminal device, or a chip set in the terminal device for realizing the function of the terminal device, or other component used for realizing the function of the terminal device.
  • the fourth communication device is a terminal device.
  • the second information further includes:
  • Suggested time information where the suggested time information is used to indicate the time when the terminal device can perform cell handover; and/or,
  • First reason information where the first reason information is used to indicate a reason why the terminal device cannot perform cell handover.
  • the second information includes one or more of the following information:
  • the terminal device has high throughput information; or,
  • the terminal device has information about data to be sent and/or data to be received; or,
  • the terminal device has information on low power consumption requirements.
  • the second information includes information that the terminal device has a high throughput rate, then the The second information is used to indicate that the MCS supported by the terminal device is higher than the MCS configured by the network device for the terminal device, or the second information is used to indicate the throughput rate supported by the terminal device, and the throughput The rate is greater than or equal to the first threshold.
  • the second information includes data to be sent and/or data to be received by the terminal device , wherein the data is the basic layer data of the first service, and the basic layer data is the data necessary to execute the first service.
  • the method further includes:
  • the sixth aspect of the fourth aspect may be In an optional embodiment, the method further includes:
  • a fifth communication method includes: not receiving second information from a terminal device; and determining that the terminal device is unable to perform cell communication based on an event of not receiving the second information from the terminal device. Handover; no cell handover operation is performed.
  • the method may be executed by a fifth communication device, and the fifth communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip.
  • the fifth communication device is a network device, or a chip set in the network device for realizing the function of the network device, or other component used for realizing the function of the network device.
  • the fifth communication device is a network device, for example, the source network device serving the terminal device before the cell handover.
  • the source network device is an access network device, such as a base station.
  • the method further includes:
  • the terminal device sends second information to the source network device.
  • the second information indicates that the terminal device is capable of cell switching, or the terminal device sends the second information event, It indicates that the terminal device can perform cell switching; and if the terminal device determines that cell switching cannot be performed, the terminal device does not send the second information to the source network device, and the event that the terminal device does not send the second information indicates that the terminal device cannot perform cell switching Or, the second information indicates that the terminal device can perform cell handover, and if the terminal device does not send the second information, it indicates that the terminal device cannot perform cell handover.
  • the terminal device only sends the second information to the source network device when it is determined that the cell handover can be performed, otherwise the second information will not be sent to the source network device. In this way, it is possible to save signaling overhead while providing a reminder to the source network device.
  • the method further includes:
  • the source network device may send the first information to the terminal device to trigger the second information of the terminal device.
  • a sixth communication method includes: determining that a terminal device cannot perform cell handover; and not sending second information to a source network device to indicate that the terminal device cannot perform cell handover.
  • the method may be executed by a sixth communication device, and the sixth communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip.
  • the sixth communication device is a terminal device, or a chip set in the terminal device for realizing the function of the terminal device, or other component used for realizing the function of the terminal device.
  • the sixth communication device is a terminal device.
  • the method further includes:
  • the method further includes:
  • the method further include:
  • a communication device is provided.
  • the communication device is used to execute the above-mentioned first aspect or the method in any possible implementation of the first aspect, for example, the communication device is the first communication device described above; or, the communication device is used to execute The third aspect or the method in any possible implementation of the third aspect, for example, the communication device is the third communication device described above; or, the communication device is used to execute the fifth aspect or the fifth aspect.
  • the communication device is the fifth communication device described above.
  • the communication device may include a module for executing the method in the first aspect or any possible implementation of the first aspect, for example, including a processing module and a transceiver module; or, the communication device may include a module for The module for executing the method in the third aspect or any possible implementation of the third aspect, for example, includes a processing module and a transceiver module; or, the communication device may include any one of the fifth aspect or the fifth aspect.
  • the modules of the method in a possible implementation manner include, for example, a processing module and a transceiver module.
  • the transceiver module may include a sending module and a receiving module. The sending module and the receiving module may be different functional modules, or may be the same functional module, but can implement different functions.
  • the communication device is a communication device, or a chip or other component provided in the communication device.
  • the communication device is a network device, for example, a source network device that serves the terminal device before the terminal device performs cell handover.
  • the source network device is, for example, an access network device, such as a base station.
  • the transceiver module may also be implemented by a transceiver, and the processing module may also be implemented by a processor.
  • the sending module may be implemented by a transmitter, and the receiving module may be implemented by a receiver.
  • the transmitter and the receiver may be different functional modules, or may be the same functional module, but can implement different functions.
  • the transceiver is realized by, for example, an antenna, a feeder, and a codec in the communication device.
  • the transceiver (or transmitter and receiver) is, for example, a communication interface in the chip, and the communication interface is connected to a radio frequency transceiver component in the communication device to Information is sent and received through radio frequency transceiver components.
  • a communication device is provided.
  • the communication device is used to execute the second aspect or the method in any possible implementation of the second aspect, for example, the communication device is the second communication device described above; or, the communication device is used to execute The fourth aspect or the method in any possible implementation of the fourth aspect, for example, the communication device is the fourth communication device described above; or, the communication device is used to execute the sixth aspect or the sixth aspect.
  • the communication device is the sixth communication device described above.
  • the communication device may include a module for executing the method in the second aspect or any possible implementation of the second aspect, for example, a transceiver module, and optionally, a processing module; or, The communication device may include a module for executing the method in the fourth aspect or any possible implementation of the fourth aspect, for example, including a processing module and a transceiver module; or, the communication device may include a module for executing the sixth aspect.
  • the module of the method in any possible implementation of the sixth aspect for example, includes a processing module and a transceiver module.
  • the transceiver module may include a sending module and a receiving module. The sending module and the receiving module may be different functional modules, or may also be the same functional module, but can implement different functions.
  • the communication device is a communication device, or a chip or other component provided in the communication device.
  • the communication device is a terminal device.
  • the transceiver module may also be implemented by a transceiver, and the processing module may also be implemented by a processor.
  • the sending module may be realized by a transmitter
  • the receiving module may be realized by a receiver.
  • the transmitter and the receiver may be different functional modules, or may be the same functional module, but can implement different functions.
  • the transceiver is realized by, for example, an antenna, a feeder, and a codec in the communication device.
  • the transceiver (or transmitter and receiver) is, for example, a communication interface in the chip, and the communication interface is connected to the radio frequency transceiver component in the communication device to Information is sent and received through radio frequency transceiver components.
  • a communication device in a ninth aspect, includes one or more processors, and optionally, may also include a communication interface, which may be used to communicate with other devices or equipment.
  • the communication device may further include one or more memories for storing computer instructions.
  • One or more processors and one or more memories are coupled with each other to implement the method described in the first aspect or various possible implementations of the first aspect.
  • the communication device is the first aspect described above.
  • the communication device is the third communication device described above; or, used to implement the foregoing third aspect
  • the communication device is the fifth communication device described above.
  • the communication device may not include a memory, and at least one memory may be located outside the communication device.
  • One or more processors, one or more memories, and communication interfaces are coupled with each other, and are used to implement the foregoing first aspect or the methods described in various possible implementations of the first aspect, or to implement the foregoing third aspect or The methods described in the various possible implementation manners of the third aspect, or the methods described in the foregoing fifth aspect or the various possible implementation manners of the fifth aspect are used to implement.
  • the communication device may further include one or more computer programs, the one or more computer programs are stored in one or more memories, and the one or more computer programs include computer instructions.
  • the communication device When one or more processors execute the computer instructions stored in the one or more memories, the communication device is caused to execute the method in the first aspect or any one of the possible implementations of the first aspect, or causes all The communication device executes the method in the third aspect or any one of the possible implementation manners of the third aspect, or causes the communication device to execute the method in the fifth aspect or any one of the possible implementation manners of the fifth aspect above .
  • the communication device is a communication device, or a chip or other component provided in the communication device.
  • the communication device is a network device, for example, a source network device that serves the terminal device before the terminal device performs cell handover.
  • the source network device is, for example, an access network device, such as a base station.
  • the communication interface is realized by, for example, the transceiver (or transmitter and receiver) in the communication device, for example, the transceiver is realized by the antenna, feeder, and codec in the communication device. ⁇ , etc. to achieve.
  • the communication device is a chip set in a communication device
  • the communication interface is, for example, the input/output interface of the chip, such as input/output pins, etc., and the communication interface is connected to the radio frequency transceiver component in the communication device to pass the radio frequency.
  • the transceiver component realizes the sending and receiving of information.
  • a communication device in a tenth aspect, includes one or more processors, and optionally, may also include a communication interface, and the communication interface may be used to communicate with other devices or equipment.
  • the communication device may further include a memory for storing computer instructions.
  • One or more processors and one or more memories are coupled with each other to implement the method described in the second aspect or various possible implementations of the second aspect.
  • the communication device is the second aspect described above.
  • the communication device is the fourth communication device described above; or, used to implement the foregoing first According to the method described in the sixth aspect or various possible implementation manners of the sixth aspect, for example, the communication device is the sixth communication device described above.
  • the communication device may not include a memory, and one or more memories may be located outside the communication device.
  • One or more processors, one or more memories, and communication interfaces are coupled with each other, and are used to implement the foregoing second aspect or the methods described in various possible implementations of the second aspect, or to implement the foregoing fourth aspect or The methods described in the various possible implementation manners of the fourth aspect, or the methods described in the above-mentioned sixth aspect or the various possible implementation manners of the sixth aspect are used to implement.
  • the communication device may further include one or more computer programs, the one or more computer programs are stored in one or more memories, and the one or more computer programs include computer instructions.
  • the second communication device When one or more processors execute the computer instructions stored in the one or more memories, the second communication device is caused to execute the method in the above-mentioned second aspect or any one of the possible implementations of the second aspect, or causes all
  • the communication device executes the method in the fourth aspect or any one of the possible implementation manners of the fourth aspect, or causes the communication device to execute the method in the sixth aspect or any one of the possible implementation manners of the sixth aspect above .
  • the communication device is a communication device, or a chip or other component provided in the communication device.
  • the communication device is a terminal device.
  • the communication interface is realized by, for example, the transceiver (or transmitter and receiver) in the communication device, for example, the transceiver is realized by the antenna, feeder, and codec in the communication device. ⁇ , etc. to achieve.
  • the communication device is a chip set in a communication device
  • the communication interface is, for example, the input/output interface of the chip, such as input/output pins, etc., and the communication interface is connected to the radio frequency transceiver component in the communication device to pass the radio frequency.
  • the transceiver component realizes the sending and receiving of information.
  • a communication system including the communication device described in the seventh aspect or the communication device described in the ninth aspect, and the communication device described in the eighth aspect or the communication device described in the tenth aspect ⁇ Communication device.
  • a computer-readable storage medium is provided, the computer-readable storage medium is used to store a computer program, and when the computer program runs on a computer, the computer executes the first aspect or the first aspect.
  • the method described in any possible implementation manner of the aspect, or the computer is caused to execute the method described in the third aspect or any one of the possible implementation manners of the third aspect, or the computer is caused to execute the foregoing The method described in the fifth aspect or any one of the possible implementations of the fifth aspect.
  • a computer-readable storage medium is provided, the computer-readable storage medium is used to store a computer program, and when the computer program runs on a computer, the computer executes the second aspect or the second aspect described above.
  • the method described in any one of the possible implementations of the aspect, or the computer is caused to execute the method described in the fourth aspect or any one of the possible implementations of the fourth aspect, or the computer is caused to execute the above The method described in the sixth aspect or any one of the possible implementation manners of the sixth aspect.
  • a computer program product containing instructions is provided, the computer program product is used to store a computer program, and when the computer program runs on a computer, the computer executes the first aspect or the first aspect described above.
  • the method described in any one of the possible implementations of the third aspect, or the computer is caused to execute the method described in the third aspect or any one of the possible implementations of the third aspect, or the computer is caused to execute the method described in the first
  • a computer program product containing instructions is provided, the computer program product is used to store a computer program, and when the computer program runs on a computer, the computer executes the second aspect or the second aspect described above.
  • the method described in any one of the possible implementations of the fourth aspect, or the computer is caused to execute the method described in the fourth aspect or any one of the possible implementations of the fourth aspect, or the computer is caused to execute the first The method described in the sixth aspect or any one of the possible implementation manners of the sixth aspect.
  • the network device may send the first information to the terminal device. If it is determined that the terminal device can perform cell handover based on the first information, the cell handover operation is performed again, thereby reducing the data transmission delay and further reducing Packet loss rate.
  • Figure 1 is a schematic diagram of the RRC state transition of a terminal device
  • Figure 2 is a flow chart of the cell handover process
  • Fig. 3 is a schematic diagram of the transmission process of XR data
  • 4 is a schematic diagram of the transmission period of application layer data and the transmission period of physical layer data
  • FIG. 5 is a schematic diagram of an application scenario of an embodiment of the application.
  • FIG. 6 is a flowchart of the first communication method provided by an embodiment of this application.
  • FIG. 7 is a flowchart of a second communication method provided by an embodiment of this application.
  • FIG. 8A is a flowchart of a third communication method provided by an embodiment of this application.
  • FIG. 8B is a schematic diagram of displaying XR video content on the display screen of the mobile phone
  • FIG. 8C is a schematic diagram of a freeze when the display screen of the mobile phone displays XR video
  • FIG. 8D is a schematic diagram of the mobile phone being unable to continue to perform the XR service and exiting the XR service;
  • FIG. 8E is a schematic diagram of a mobile phone that can continue to perform XR services after using the method provided in the embodiment of the present application;
  • FIG. 9 is a first schematic block diagram of a source network device provided by an embodiment of this application.
  • FIG. 10 is a first schematic block diagram of a terminal device provided by an embodiment of this application.
  • FIG. 11 is a second schematic block diagram of a source network device according to an embodiment of this application.
  • FIG. 12 is a second schematic block diagram of a terminal device according to an embodiment of this application.
  • FIG. 13 is a third schematic block diagram of a source network device provided by an embodiment of this application.
  • FIG. 14 is a third schematic block diagram of a terminal device provided by an embodiment of this application.
  • 15 is a schematic block diagram of a communication device provided by an embodiment of this application.
  • FIG. 16 is another schematic block diagram of a communication device according to an embodiment of this application.
  • FIG. 17 is still another schematic block diagram of a communication device provided by an embodiment of this application.
  • FIG. 18 is another schematic block diagram of a communication device according to an embodiment of this application.
  • Terminal devices including devices that provide users with voice and/or data connectivity, specifically, include devices that provide users with voice, or include devices that provide users with data connectivity, or include devices that provide users with voice and data connectivity Sexual equipment.
  • it may include a handheld device with a wireless connection function, or a processing device connected to a wireless modem.
  • the terminal device can communicate with the core network via a radio access network (RAN), exchange voice or data with the RAN, or exchange voice and data with the RAN.
  • RAN radio access network
  • the terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device communication (device-to-device, D2D) terminal equipment, vehicle to everything (V2X) terminal equipment , Machine-to-machine/machine-type communications (M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, subscriber unit, subscriber station), mobile station (mobile station), remote station (remote station), access point (AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user Agent (user agent), or user equipment (user device), etc.
  • UE user equipment
  • wireless terminal equipment mobile terminal equipment
  • mobile terminal equipment device-to-device communication
  • D2D device-to-device communication
  • V2X vehicle to everything
  • M2M/MTC Machine-to-machine/machine-type communications
  • IoT Internet of things
  • subscriber unit subscriber station
  • mobile station mobile station
  • remote station remote station
  • access point AP
  • remote terminal remote
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • restricted devices such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities. Examples include barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing equipment.
  • RFID radio frequency identification
  • GPS global positioning system
  • 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 the 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 directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which need 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 various terminal devices introduced above if they are located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be considered as vehicle-mounted terminal equipment.
  • vehicle-mounted terminal equipment is, for example, also called on-board unit (OBU). ).
  • the terminal device may also include a relay. Or it can be understood that everything that can communicate with the base station can be regarded as a terminal device.
  • the device used to implement the function of the terminal device may be a terminal device, or a device capable of supporting the terminal device to implement the function, such as a chip system, and the device may be installed in the terminal device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the device for implementing the functions of the terminal is a terminal device as an example to describe the technical solutions provided by the embodiments of the present application.
  • Network equipment including, for example, access network (AN) equipment, such as a base station (e.g., access point), which can refer to equipment that communicates with wireless terminal equipment through one or more cells on the air interface in the access network
  • AN access network
  • a base station e.g., access point
  • V2X vehicle-to-everything
  • RSU roadside unit
  • the base station can be used to convert received air frames and IP packets into each other, and act as a router between the terminal device and the rest of the access network, where the rest of the access network can include the IP network.
  • the RSU can be a fixed infrastructure entity that supports V2X applications, and can exchange messages with other entities that support V2X applications.
  • the network equipment can also coordinate the attribute management of the air interface.
  • the network equipment may include the evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in the LTE system or the long term evolution-advanced (LTE-A), or may also include the fifth-generation mobile Communication technology (the 5th generation, 5G) new radio (NR) system (also referred to as the NR system) next generation node B (next generation node B, gNB) or may also include cloud radio
  • the centralized unit (CU) and distributed unit (DU) in the access network (Cloud RAN) system are not limited in the embodiment of the present application.
  • the network equipment may also include core network equipment.
  • the core network equipment includes, for example, access and mobility management functions (AMF), session management functions (SMF) or user plane functions in the 5G system. function, UPF), etc., or include the mobility management entity (MME) in the 4G system.
  • AMF access and mobility management functions
  • SMF session management functions
  • UPF user plane functions
  • MME mobility management entity
  • the access network equipment is mainly involved. Therefore, unless otherwise specified, the network equipment mentioned later refers to the access network equipment.
  • the device used to implement the function of the network device may be a network device, or a device capable of supporting the network device to implement the function, such as a chip system, and the device may be installed in the network device.
  • the device used to implement the functions of the network equipment is a network device as an example to describe the technical solutions provided in the embodiments of the present application.
  • the DRX mechanism includes a DRX cycle (cycle).
  • a terminal device will periodically "wake up” for a period of time during the DRX cycle, and can maintain a "sleep" state at other times in the DRX cycle to reduce power consumption. To put it simply, under the DRX mechanism, the terminal device can periodically enter the sleep state without monitoring the physical downlink control channel (PDCCH).
  • PDCH physical downlink control channel
  • the terminal device has three RRC states: RRC connected state, RRC idle state and RRC inactive state.
  • RRC connected state (or, can also be referred to as connected state for short.
  • connected state and “RRC connected state” are the same concept, and the two terms can be interchanged): the terminal device establishes an RRC connection with the network, and it can Perform data transfer.
  • RRC idle state (or, can also be referred to as idle state for short.
  • idle state and “RRC idle state” are the same concept, and the two terms can be interchanged): the terminal device does not establish an RRC connection with the network, and the base station The context of the terminal device is not stored. If the terminal device needs to enter the RRC connected state from the RRC idle state, it needs to initiate an RRC connection establishment process.
  • RRC inactive state (or, can also be called RRC inactive state, or simply inactive state or inactive state.
  • inactive state “inactive state”, “inactive state”, “inactive state”, ““Deactivated state”, “inactive state”, “RRC inactive state” or “RRC deactivated state”, etc., are the same concept, these terms can be interchanged): the terminal equipment has entered the RRC connection at the anchor base station before Then the anchor base station releases the RRC connection, but the anchor base station saves the context of the terminal device. If the terminal device needs to enter the RRC connected state again from the RRC inactive state, it needs to initiate the RRC connection recovery process (or called the RRC connection re-establishment process) at the base station where it currently resides.
  • RRC connection recovery process or called the RRC connection re-establishment process
  • the base station where the terminal device currently resides and the anchor base station of the terminal device may be the same base station or different base stations.
  • the RRC recovery process has shorter time delay and lower signaling overhead.
  • the base station needs to save the context of the terminal device, which will occupy the storage overhead of the base station.
  • FIG. 1 is a schematic diagram of the RRC state transition of a terminal device.
  • the terminal device When the terminal device is in the RRC idle state, it can enter the RRC connected state through the RRC connection establishment process. When the terminal device is in the RRC connected state, it can also fall back to the RRC idle state through the RRC connection release process. When the terminal device is in the RRC connected state, it can also enter the RRC inactive state through the RRC connection release but with suspend process. When the terminal device is in the RRC inactive state, it can fall back to the RRC connection release process. The RRC idle state, or when the terminal device is in the RRC inactive state, can also enter the RRC connected state through the RRC connection resume (resume) process.
  • the ordinal numbers such as “first” and “second” mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the size, content, order, and timing of multiple objects. , Priority or importance, etc.
  • the first information and the second information are only for distinguishing different information, but do not indicate the difference in the information size, content, sending order, priority, or importance of the two information.
  • the terminal device can determine whether the terminal device is within the coverage of a cell through radio resource management (RRM), and the terminal device can receive reference signals from multiple cells, according to the received power of the reference signal. Select the cell to be accessed.
  • RRM radio resource management
  • the cell reselection is mainly realized by the terminal equipment, and after meeting certain trigger conditions and access criteria, the terminal equipment completes the cell reselection.
  • the cell handover requires the network equipment to use a series of RRM measurement configurations and configure the terminal equipment according to the feedback of the terminal equipment. If the RRM measurement result meets certain conditions, the network device can send a handover command to the terminal device to instruct the terminal device to switch from one cell to another.
  • Cell handover is an important operation for the mobility and state transition of the terminal equipment. It refers to the operation of changing the serving cell when the terminal equipment is in the RRC connected state.
  • the cell handover operation is divided into two major scenarios as a whole, namely intra-system handover and inter-system handover. Handover within the system does not involve the change of the core network, and handover outside the system involves the change of the core network.
  • the core network here may be a 5G core network (5G Core, 5GC), or may also be an evolved packet core network (evolved packet core, EPC).
  • FIG. 2 is a flow chart of the cell handover process.
  • Figure 2 does not show the core network side operations. Therefore, the cell handover process shown in Figure 2 can be applied to the intra-system handover process as well as the out-of-system handover. process.
  • the source base station sends a handover request (handover request) message to the target base station, and the target base station receives the handover request message from the source base station.
  • the handover request message is used to instruct the terminal device to be handed over from the source base station to the target base station.
  • the target base station performs admission control (admission control). That is, the target base station determines whether to allow the terminal device to switch to the target base station.
  • the target base station sends a handover request acknowledgement message to the source base station, and the source base station receives the handover request acknowledgement message from the target base station.
  • the handover request response message may indicate that the target base station allows the terminal device to be handed over to the target base station.
  • the source base station sends an RRC reconfiguration (RRC reconfiguration) message to the terminal device, and the terminal device receives the RRC reconfiguration message from the source base station.
  • RRC reconfiguration RRC reconfiguration
  • the RRC reconfiguration message may instruct the terminal device to switch from the source base station to the target base station.
  • the terminal device performs a handover operation to switch from the source base station to the target base station, or in other words, switch to a new cell from the current serving cell.
  • the terminal device will perform the switching operation.
  • the terminal device does not need to go to the target base station for random access.
  • the RRC reconfiguration message sent by the source base station to the terminal device contains the ID of the target cell and all the access resource information required to access the target cell. Therefore, the terminal device does not need to read the system information of the target cell to randomly access the target cell. Specifically, the terminal device only needs to perform normal uplink transmission scheduling according to the resource indication in the RRC reconfiguration message at this time.
  • the terminal device sends an RRC reconfiguration complete (RRC reconfiguration complete) message to the target base station, and the target base station receives the RRC reconfiguration complete message from the terminal device.
  • RRC reconfiguration complete RRC reconfiguration complete
  • the completion of RRC reconfiguration can indicate that the terminal device has been switched.
  • the terminal equipment completes the cell handover process.
  • the source base station is sending downlink data to the terminal device.
  • the source base station cannot send downlink data to the terminal device.
  • the source base station may send the downlink data that has not been sent to the terminal device to the target base station. Therefore, after the handover is completed, the target base station can continue to send these downlink data to the terminal device. It can be seen that if the cell handover process is encountered, the data transmission delay is relatively large. The long transmission delay may lead to a higher packet loss rate.
  • the source base station may send relatively important data to the terminal device. For relatively important data, if the packet loss rate is high, the terminal device may be unable to perform corresponding processing. For example, the source base station sends the basic layer data of the extended reality (XR) service to the terminal device. If the basic layer data is lost, the terminal device may not be able to perform the XR service.
  • XR extended reality
  • XR refers to a combination of real and virtual, human-computer interaction environment produced by computer technology and wearable devices.
  • Extended reality includes multiple forms such as augmented reality (AR), virtual reality (VR), or mixed reality (MR). It is an important development direction for future terminal equipment and an important application of 5G technology. direction.
  • the data corresponding to the XR business can be divided into basic layer data and enhanced layer data in terms of importance.
  • the basic layer data is usually the data necessary to perform XR services, such as background pictures or current perspective diagrams, etc., to ensure that the XR services can be executed.
  • the enhancement layer data is usually data used to enhance the XR service experience, but is not the data necessary for the XR service, such as more refined picture detail data, motion compensation data, or visual enhancement data.
  • the terminal device can provide users with basic XR services, but the clarity or fluency of XR services may be affected, such as what users watch The picture may not be very clear.
  • the terminal device When the terminal device receives the enhancement layer data, it can provide the user with a better XR service, for example, the user can watch a clearer picture. If the terminal device cannot receive the basic layer data, no matter whether the terminal device receives the enhanced layer data or not, the terminal device cannot provide XR services to the user. If the terminal device cannot receive the enhancement layer data but receives the basic layer data, the terminal device can still provide XR services to the user. It can be seen that the basic layer data is more important than the enhancement layer data.
  • the business volume of the XR service depends on whether the terminal device has any action, and the conventional data transmission process can be referred to as shown in Figure 3.
  • the left side in FIG. 3 represents the network side, for example, including core network equipment and access network equipment
  • the smart glasses worn by the user on the right represent terminal devices
  • FIG. 3 uses smart glasses as an example.
  • the network may send XR data corresponding to the XR service to the terminal device, and the circle in the middle identifies the XR data.
  • the amount of data sent by the network is relatively large, and may include basic layer data and enhancement layer data.
  • the sector in the circle in the middle represents the basic layer data
  • the part outside the sector represents the enhancement layer data.
  • the terminal device can provide users with XR services based on the XR data from the network. For example, users can watch XR images through the smart glasses.
  • the terminal device may also send XR data to the network.
  • the XR data sent by the terminal device is, for example, some control data, for example, used to instruct the viewing angle to be changed. Therefore, the amount of XR data sent by the terminal device is relatively small.
  • the XR data sent by the terminal device to the network may also include basic layer data and enhancement layer data. After the network receives the XR data from the terminal device, it can send the corresponding XR data to the terminal device.
  • the basic layer data and the enhancement layer data are transmitted through different data streams. Both of these data streams have the characteristic of periodic sudden increase, that is, the throughput rate may be lower for a long period of time. When the corresponding data is transmitted, the data flow increases sharply.
  • the data corresponding to the XR service can be divided into basic layer data and enhancement layer data in terms of importance, and into application layer data and physical layer data in terms of protocol stack.
  • application layer data can be divided into application layer data and physical layer data.
  • physical layer data can also include basic layer data and enhancement layer data.
  • Fig. 4 is a schematic diagram of the transmission period of application layer data and the transmission period of physical layer data.
  • the vertical axis represents the amount of data
  • the horizontal axis represents time.
  • Figure 4 takes the application layer data transmission cycle of 16.7ms as an example.
  • Figure 4 takes the transmission period of the physical layer data of 10ms as an example. It can be seen that there is no physical layer data transmission in a relatively long period of time in a period, but physical layer data is only available in a shorter period of time in a period. transmission.
  • the source base station Before the cell handover, for example, the source base station sends XR data to the terminal device, and after the cell handover starts, the source base station cannot send XR data to the terminal device.
  • the source base station may send the XR data that has not been sent to the terminal device to the target base station.
  • the target base station After the cell handover is completed, the target base station sends these XR data to the terminal device. And these XR data may include basic layer data.
  • XR data is more important data. Due to the cell handover process, the transmission delay of the basic layer data is relatively large, which will affect the user experience, such as causing the XR service provided by the terminal device to the user to be stuck. The long transmission delay may also lead to a high packet loss rate. If the packet loss rate is high, the terminal device may not be able to perform corresponding processing. For example, the terminal device cannot continue to provide the XR service to the user, thereby causing the XR service to be interrupted.
  • the network device may send the first information to the terminal device. If the terminal device is determined to be able to perform cell handover based on the first information, the cell handover operation is performed again. For example, if the terminal device has data being transmitted, The cell handover may not be performed. In this way, try to perform the cell switching process after the data transmission is completed, thereby reducing the data transmission delay and further reducing the packet loss rate.
  • the technical solutions provided by the embodiments of this application can be applied to the fourth generation mobile communication technology (the 4th generation, 4G) system, such as the LTE system, or can be applied to the 5G system, such as the NR system, or can also be applied to the next generation Mobile communication systems or other similar communication systems are not specifically restricted.
  • the 4th generation, 4G such as the LTE system
  • the 5G system such as the NR system
  • next generation Mobile communication systems or other similar communication systems are not specifically restricted.
  • FIG. 5 is a schematic diagram of an application scenario of an embodiment of this application.
  • Figure 5 includes terminal equipment, access network equipment 1 and access network equipment 2.
  • the access network equipment 1 is the access network equipment that the terminal equipment accesses before the cell handover, or in other words, the cell 1 provided by the access network equipment 1 is the serving cell of the terminal equipment before the cell handover.
  • the terminal device can perform cell handover to switch from the access network device 1 to the access network device 2, or in other words, it can switch from the cell 1 to the cell 2 provided by the access network device 2.
  • the cell 2 is the terminal device in the cell handover After the service area.
  • the access network device 1 may be referred to as the source access network device of the terminal device, and the access network device 2 may be referred to as the target access network device of the terminal device.
  • the cell handover performed by terminal equipment may also involve core network equipment, but the embodiments of this application do not focus on core network equipment, that is, the technical solutions provided in the embodiments of this application can be applied to intra-system handovers as well as external-system handovers. Therefore, Figure 5 does not show the core network equipment.
  • the access network device in FIG. 5 is, for example, a base station.
  • the access network equipment corresponds to different equipment in different systems.
  • a 4G system it can correspond to an eNB
  • a 5G system it corresponds to an access network equipment in 5G, such as gNB.
  • the technical solutions provided by the embodiments of the present application can also be applied to future mobile communication systems. Therefore, the access network equipment in FIG. 5 can also correspond to network equipment in future mobile communication systems.
  • Figure 5 takes the access network device as a base station as an example.
  • the access network device may also be a device such as an RSU.
  • the embodiment of the present application provides a first communication method. Please refer to FIG. 6, which is a flowchart of this method. In the following introduction process, the application of this method to the network architecture shown in FIG. 5 is taken as an example.
  • the method executed by the network device and the terminal device is taken as an example.
  • the terminal device described below may be the terminal device in the network architecture shown in FIG. 5, and the source network device described below It may be the access network device 1 in the network architecture shown in FIG. 5, and the target network device described below may be the access network device 2 in the network architecture shown in FIG. 5.
  • the source network device Before initiating a cell handover, the source network device sends first information to the terminal device, and correspondingly, the terminal device receives the first information from the source network device.
  • the terminal device if the terminal device is in a mobile state, the relative position of the terminal device and surrounding cells (cells) will also constantly change. In order to ensure the channel quality of the terminal device, the terminal device will continuously measure the wireless channel quality of the surrounding cells and send the measurement result to the source network device through a measurement report. The source network device determines whether the terminal device meets the cell handover condition according to the information such as the level and intensity of the serving cell and neighboring cells contained in the measurement report. If the source network device determines that the terminal device meets the cell handover conditions, the source network device can send first information to the terminal device.
  • the first information can be used to inquire whether the terminal device can perform cell handover, or the source network device is determining that cell handover is required (Not yet handed over), directly send the first information to the terminal device without determining whether the terminal device meets the cell handover condition.
  • the first information may also have other names, for example, it may also be referred to as handover query information, etc., as long as the first information can inquire whether the terminal device can perform cell handover, the embodiment of the present application refers to the first information The name is not restricted.
  • the first information is, for example, included in a first message.
  • the first message is, for example, an RRC message.
  • the RRC message is, for example, an RRC setup request (RRC setup request) message, or may also be an RRC reconfiguration message. Because the message related to cell handover is originally an RRC message, the first message is realized through an RRC message, which is a more reasonable design and is more conducive to compatibility with existing technologies.
  • the first message may also be other messages, such as downlink control information (DCI) or media access control (media access control, MAC) control element (CE), etc.
  • DCI downlink control information
  • MAC media access control
  • CE media access control element
  • the first message is, to include the first information in the first message, one way is to use the reserved bits of the original field in the first message to carry the first information. There is no need to add a new domain to the first message, which is more conducive to compatibility with existing message formats. Or, to include the first information in the first message, another way is to add a new domain to the first message, and the newly added domain can be used to carry the first information. The first information is carried by the newly added domain, which makes it easier for the terminal device to recognize the first information, and the instructions are clearer.
  • S601 is an optional step, that is, the source network device may not send the first information to the terminal device. Therefore, S601 is represented by a dashed line in FIG. 6.
  • the terminal device determines whether the terminal device can perform cell handover.
  • the terminal device can determine whether the terminal device can perform cell handover after receiving the first information.
  • the terminal device can also periodically determine whether the terminal device can perform cell handover, or if S601 is not performed, the terminal device can also determine whether the terminal device can perform cell handover under other circumstances.
  • one way for the terminal device to determine whether the terminal device can perform cell handover is that the terminal device can determine whether there is service data to be received or sent. The device determines that the cell handover can be performed.
  • the importance level of the service data is higher than the first level (or, the priority is higher than the first level).
  • the terminal device determines that there is service data to be received or sent, and the importance level of the service data is higher than the first level, the terminal device determines that cell handover cannot be performed; or if the terminal device determines that there is a service to be received or sent Data, but the importance level of the service data is lower than or equal to the first level, the terminal device determines that it can perform cell handover; or, if the terminal device determines that there is no service data to be received or sent, the terminal device determines that it can perform cell handover .
  • the importance level is higher than the first level, which can indicate that the business data is more important data or data with higher priority.
  • the delay will be longer, which will lead to loss.
  • a higher packet rate may have a greater impact on the terminal device, for example, it may cause the terminal device to be unable to execute the service corresponding to the service data. Therefore, if the terminal device is to receive or send such service data before the cell handover, the terminal device can determine that the cell handover cannot be performed, so as not to perform the cell handover as much as possible. For example, the terminal device can continue to perform the transmission of the service data. Reduce the transmission delay of the service data, thereby reducing the packet loss rate.
  • the business data is the data of the first business, for example, the first business is the XR business
  • the business data is, for example, the basic layer data of the XR business, or the first business can also be other businesses, and the business data can also be other businesses.
  • the terminal device may also determine whether cell handover can be performed in other ways, which depends on the implementation of the terminal device, and the embodiment of the present application does not limit the manner adopted by the terminal device.
  • the service data can correspond to any important level (or priority), or in other words, the terminal device only determines whether the cell handover can be performed based on whether there is service data to be transmitted, and is related to the service data.
  • the importance level is irrelevant. For example, as long as the terminal device determines that there is service data to be received and/or to be sent, the terminal device determines that cell handover cannot be performed; or, if the terminal device determines that there is no service data to be received and no service data to be sent, the terminal device Confirm that cell handover can be performed. In this way, the important level of service data is not distinguished, and as long as there is service data to be sent or received, the terminal device determines that cell switching cannot be performed. In this way, the transmission delay of more service data can be reduced.
  • the terminal device sends the second information to the source network device, and the source network device receives the second information from the terminal device.
  • the source network device receives the second information from the terminal device, that is, obtains the second information.
  • the second information may also have other names, for example, it may also be referred to as handover query acknowledgement information, etc.
  • the embodiment of the present application does not limit the name of the second information.
  • implementation mechanism 1 is provided.
  • implementation mechanism 1 is that regardless of whether the terminal device can perform cell handover, S603 will be executed, that is, the terminal device will send the second information to the source network device.
  • implementation mechanism 1 is specifically that if the terminal device determines that cell handover is possible, the terminal device sends second information to the source network device. The second information indicates that the terminal device can perform cell handover, and if the terminal device determines that cell handover cannot be performed, The terminal device sends second information to the source network device, and the second information indicates that the terminal device cannot perform cell handover.
  • the terminal device will send the second information to the source network device, and the source network device can determine whether the terminal device can perform the cell handover according to the indication of the second information.
  • the second information may occupy one or more bits. Taking 1 bit for the second information as an example, if the value of this bit is "0", it means that the terminal device cannot perform cell handover. The value is "1", which means that the terminal device can perform cell handover. In a simple way, it is possible to indicate to the source network device whether the terminal device can perform cell handover, and the indication method is relatively clear. Under implementation mechanism 1, S601 can be executed or not.
  • the terminal device sends the second information to the source network device, which can be considered to be sent in response to the first information, or if S601 is executed, it is considered that the terminal device is triggered by the source network device to determine the terminal Whether the device can perform cell handover, or in other words, if S601 is performed, the terminal device determines whether the terminal device can perform cell handover according to the first information.
  • the second information may also include recommended time information, or the second information may also include the first reason information, or the second information It may also include suggested time information and first reason information.
  • the recommended time information may indicate the time when the terminal device can perform cell handover
  • the first reason information may indicate the reason why the terminal device cannot perform cell handover.
  • the terminal device may send a second message to the source network device. The second message includes second information. If the second information indicates that the terminal device cannot perform cell handover, then optionally, the second message may also include the recommended time. Information and/or first cause information.
  • the terminal device can estimate the time when the cell handover can be performed, and send the recommended time information to the source network device, so that the source network device can retry at the time indicated by the recommended time information Initiate a cell handover.
  • the terminal device may determine the recommended time information according to the business volume of the first service, or may determine the recommended time information according to the type of the first service, or may determine the recommended time information according to the volume and type of the first service, etc. If the second information does not include the recommended time information, the source network device can decide when to initiate the cell handover again by the source network device.
  • the terminal device may send the first cause information to the source network device, so that the source network device can determine the reason why the terminal device cannot perform the cell handover currently.
  • the reason why the terminal device cannot perform cell handover is that the amount of currently transmitted data is large, or the priority of the currently transmitted data is high (for example, it can indicate that the currently transmitted data is basic layer data), or the terminal device has power reduction Demand, etc.
  • the service volume of the first service may include the total service volume of the first service.
  • the source network device may send the data of the first service to the terminal device.
  • the total service volume informs the terminal equipment that the service volume of the first service may also include the service volume of the first service received by the terminal equipment, so that the terminal equipment can estimate the remaining service volume based on the total service volume and the received service volume.
  • the terminal device can perform cell handover, the recommended time information can indicate the remaining transmission time, or the recommended time information can also indicate the first moment, which is the first service The moment when the transmission ends.
  • the transmission time may have been specified. For example, it may be specified through a protocol, or it may be pre-specified by the source network device. Then, if the first service is this type of service, the terminal equipment can determine the remaining transmission time according to this type. When the remaining transmission time is reached, the terminal equipment can perform cell handover, and the recommended time information can indicate the remaining transmission time. The transmission time or the recommended time information may also indicate the first moment, which is the moment when the first service transmission ends.
  • implementation mechanism 2 is that S603 will be executed when a condition is met. This condition means that the terminal device determines that the cell handover can be performed. That is, the implementation mechanism 2 is that if the terminal device determines that cell handover can be performed, the terminal device executes S603, that is, the terminal device sends second information to the source network device, and the second information indicates that the terminal device can perform cell handover, or the terminal device The event that the device sends the second information indicates that the terminal device can perform cell switching; and if the terminal device determines that cell switching cannot be performed, the terminal device does not perform S603, that is, the terminal device does not send the second information to the source network device, and the terminal device The event of not sending the second information indicates that the terminal device cannot perform cell handover, or the second information indicates that the terminal device can perform cell handover, and if the terminal device does not send the second information, it indicates that the terminal device cannot perform cell handover.
  • the second information may occupy one or more bits, and there is no restriction on the value of the one or more bits. Therefore, if the source network device receives the second information from the terminal device, it can determine based on the second information that the terminal device can perform cell handover, or determine that the terminal device can perform cell handover according to the event of receiving the second information; or, if the source If the network device does not receive the second information from the terminal device, it can be determined that the terminal device cannot perform cell switching (the second information indicates that the terminal device can perform cell switching, so if the second information is not received, it is determined that the terminal device cannot perform cell switching), Or, it may be determined that the terminal device cannot perform cell handover according to an event that the second information is not received. Under implementation mechanism 2, if the terminal device cannot perform cell handover, the terminal device does not need to send the second information to the source network device, which helps to save signaling overhead.
  • S601 can be executed or not. If S601 is executed, if the terminal device sends the second information to the source network device, it can be considered as being sent in response to the first information, or if S601 is executed, it is considered that the terminal device is triggered by the source network device and determines Whether the terminal device can perform cell handover, or in other words, if S601 is performed, the terminal device determines whether the terminal device can perform cell handover according to the first information.
  • implementation mechanism 3 is provided. Under implementation mechanism 3, S603 is not executed, but S601 is executed, that is, the source network device will send the first information to the terminal device, but the terminal device will not The source network device sends the second information. In this way, S602 can still be executed, that is, the terminal device can still determine whether the cell handover can be performed, but regardless of whether the terminal device determines that the cell handover can be performed or cannot perform the cell handover, the terminal device will not send the first network device to the source network device. Two information.
  • the source network device can decide whether to perform cell handover based on the feedback of the terminal device (that is, the second information), but for implementation mechanism 3, the terminal device will not feedback, so After the source network device executes S601, it will perform cell handover. That is, under implementation mechanism 3, for the terminal device, if S602 is executed, the source network device will initiate the cell switch regardless of whether the terminal device determines that the cell handover can or cannot be performed, and the terminal device needs to perform the cell handover.
  • the terminal device will perform cell handover anyway, since the terminal device receives the first information from the source network device, there will be a certain amount of time between the terminal device receiving the first information and the cell handover. Buffer time. For example, if the terminal device determines that the terminal device cannot actually perform cell handover, the terminal device can use this buffer time to perform corresponding processing to minimize the packet loss rate.
  • the terminal device has service data to be received, the service data corresponds to a first service, and the first service is an XR service, for example, the terminal device is watching a VR image.
  • the terminal device receives the first information from the source network device, the terminal device can lower the definition of the image, the terminal device lowers the definition, the source network device can also learn the situation, the terminal device is lowering the definition After the temperature is reached, the amount of data required for the first service will be reduced, and the source network device does not need to send a large amount of data to the terminal device, and the amount of data transmitted can be reduced, or the source network device can reduce the transmission rate. In this way, even if the transmission delay of the service data to be sent by the source network device to the terminal device is large due to the cell handover process, the data volume of the service data is small, so the packet loss rate can be reduced to a certain extent.
  • the source network device can notify the terminal device in advance of which implementation mechanism to use, or it can be specified through a protocol, or the implementation mechanism can also be pre-configured in the source network device and the terminal device.
  • the second information can be included in the second message and sent to the source network device.
  • the second information is, for example, included in a second message
  • the second message is, for example, an RRC message, such as an RRC setup complete (RRC setup complete) message, or may also be an RRC reconfiguration complete message.
  • RRC setup complete RRC setup complete
  • the second message is an RRC message, which is a more reasonable design and helps to be compatible with existing technologies.
  • the second message may also be other messages, such as MAC CE and so on.
  • the second message is, to include the second information in the second message, one way is to use the reserved bits of the original field in the second message to carry the second information. Adding a new domain to the message is more conducive to compatibility with the existing message format. Or, to include the second information in the second message, another way is to add a new domain to the second message, and the newly added domain can be used to carry the second information. The second information is carried by the newly added domain, so that the terminal device can recognize the second information more easily and the instructions are more clear.
  • S603 is only an optional step, which is represented by a dotted line in FIG. 6.
  • the source network device sends a handover request message to the target network device, and the target network device receives the handover request message from the source network device.
  • the handover request message can be used to request the terminal device to be switched to the target network device. From here on, it can be regarded as the source network device to perform the cell handover operation.
  • the source network device can perform the cell handover operation, that is, the source network device can perform S604 and the others that will be introduced next. Step; and if the second information received by the source network device indicates that the terminal device cannot perform cell switching, the source network device may not initiate cell switching, that is, the source network device does not perform S604 and other steps that will be introduced next, and the process ends.
  • the source network device may determine the time for initiating cell handover next time according to the recommended time information.
  • the source network device can initiate a cell handover again.
  • the source network device initiates a cell handover again, it does not need to perform S601 to S603, but directly performs S604 and other steps that will be introduced next.
  • the source network device can determine the time for the next cell handover to be initiated by itself.
  • the source network device When the source network device initiates the cell handover again, it does not need to execute S601 ⁇ S603, but directly executes S604 and the following Other steps to be introduced, or when the source network device initiates cell handover again, can continue to perform S601 (or, perform S602 and S603, or, perform S601-S603) and subsequent steps.
  • the source network device determines that the terminal device can perform cell handover, and the source network device can perform the cell handover operation, that is, the source network device can perform S604 and the following Other steps to be introduced; and if the source network device does not receive the second information, the source network device determines that the terminal device cannot perform cell handover, or if the source network device does not receive the second information within the first period of time, the source network device If it is determined that the terminal device cannot perform the cell handover, the source network device may not initiate the cell handover, that is, the source network device does not perform S604 and other steps that will be introduced next, and the process ends.
  • the start time of the first duration is, for example, the moment when the source network device sends the first information, and the duration of the first duration may be set by the source network device or specified by a protocol. However, if S601 is not executed, the first duration may not be considered.
  • the terminal device determines that the cell handover cannot be performed, it will not send the second information to the source network device. Therefore, the terminal device cannot suggest the time for the next cell handover to the source network device. Then, the source network device can determine the time for the next cell handover to be initiated by itself. When the source network device initiates the cell handover again, it does not need to perform S601 to S603, but directly performs S604 and other steps that will be introduced next, or when When the source network device initiates the cell handover again, it can continue to perform S601 (or, perform S602 and S603, or, perform S601-S603) and subsequent steps.
  • the source network device can perform the cell handover operation after sending the first information to the terminal device, that is, the source network device can perform S604 and other steps that will be introduced next, or the source network device It is also possible to perform the cell handover operation after the second duration of the first information is sent to the terminal device, that is, the source network device may perform S604 and other steps that will be introduced next.
  • the second duration can be reserved for the terminal device as a buffer time. For example, the terminal device can perform some operations to minimize the packet loss rate.
  • the second duration can be specified by the protocol, or can also be set by the source network device.
  • the target network device performs admission control. That is, the target network device can determine whether to allow the terminal device to switch to the target network device.
  • the target network device sends a switching request response message to the source network device, and the source network device receives the switching request response message from the target network device.
  • the target network device can send a switching request response message to the source network device according to the result of the admission control.
  • the switching request response message can be used to instruct the target network device to allow the terminal device to switch to the target network device, or instruct the target network device to not allow the terminal device to switch to Target network device.
  • the source network device sends an RRC reconfiguration message to the terminal device, and the terminal device receives the RRC reconfiguration message from the source network device.
  • the source network device executes S607, and the RRC reconfiguration message may instruct the terminal device to switch from the source network device to the target network device. In addition, the source network device will also release the terminal device.
  • the source network device does not need to perform S607, and this cell handover process is terminated. For example, the source network device can search for the target network device again to initiate the cell handover process again.
  • the terminal device switches from the source network device to the target network device.
  • the terminal device switches from the first cell provided by the source network device to the second cell provided by the target network device.
  • the first cell is the serving cell before the terminal device is switched, and the second cell is the serving cell after the terminal device is switched.
  • the terminal device sends an RRC reconfiguration complete message to the target network device, and the target network device receives the RRC reconfiguration complete message from the terminal device.
  • the RRC reconfiguration complete message can instruct the terminal device to complete the cell handover.
  • the cell handover process of the terminal device may also involve other signaling, such as the interaction between the access network device and the core network device, etc., which are all included in the scope of the embodiments of this application, and the embodiments of this application do not Not written out one by one.
  • the cell switching operation may be performed as far as possible when it is determined that the terminal device can perform the cell switching. For example, if the terminal device has data being transmitted, the cell switching may not be performed. In this way, try to perform the cell switching process after the data transmission is completed, thereby reducing the data transmission delay and further reducing the packet loss rate.
  • FIG. 7 is a flowchart of this method.
  • the application of this method to the network architecture shown in FIG. 5 is taken as an example.
  • the method executed by the network device and the terminal device is taken as an example.
  • the terminal device described below may be the terminal device in the network architecture shown in FIG. 5, and the source network device described below It may be the access network device 1 in the network architecture shown in FIG. 5, and the target network device described below may be the access network device 2 in the network architecture shown in FIG. 5.
  • the source network device sends a handover request message to the target network device, and the target network device receives the handover request message from the source network device.
  • the handover request message can be used to request the terminal device to be switched to the target network device.
  • the source network device may send a handover request message to the target network device to request the terminal device to be handed over to the target network device.
  • the target network device performs admission control. That is, the target network device can determine whether to allow the terminal device to switch to the target network device.
  • the target network device sends a switching request response message to the source network device, and the source network device receives the switching request response message from the target network device.
  • the target network device can send a switching request response message to the source network device according to the result of the admission control.
  • the switching request response message can be used to instruct the target network device to allow the terminal device to switch to the target network device, or instruct the target network device to not allow the terminal device to switch to Target network device.
  • the source network device sends the first information to the terminal device, and the terminal device receives the first information from the source network device.
  • the source network device may perform S704, that is, the source network device sends the first information to the terminal device, and if the switching request response information indicates that the target network device allows If the terminal device switches to the target network device, the source network device does not need to perform S704, and the process is terminated. For example, the source network device can search for the target network device again to re-initiate the cell handover procedure.
  • the first information may also have other names, for example, it may also be called switching query information, etc.
  • the embodiment of the present application does not limit the names of the features.
  • S704 is an optional step, which is represented by a dotted line in FIG. 7.
  • S704 refer to the introduction of S601 in the embodiment shown in FIG. 6.
  • S705 The terminal device determines whether the terminal device can perform cell handover.
  • the terminal device sends the second information to the source network device, and the source network device receives the second information from the terminal device.
  • the source network device receives the second information from the terminal device, that is, obtains the second information.
  • the second information may also have other names, for example, it may also be referred to as handover query response information, etc.
  • the embodiment of the present application does not limit the name of the feature.
  • S706 is an optional step, which is represented by a dashed line in FIG. 7.
  • S706 refer to the introduction of S603 in the embodiment shown in FIG. 6.
  • the source network device sends an RRC reconfiguration message to the terminal device, and the terminal device receives the RRC reconfiguration message from the source network device.
  • the RRC reconfiguration message may instruct the terminal device to switch from the source network device to the target network device.
  • the source network device will also release the terminal device. From here on, it can be regarded as the source network device to perform the cell handover operation.
  • S701 and S702 are also the source network equipment performing the cell handover operation.
  • the source network device can continue to perform the cell handover operation, that is, the source network device can perform S707 and the following will be introduced Other steps; and if the second information received by the source network device indicates that the terminal device cannot perform cell handover, the source network device may not continue to perform cell handover, that is, the source network device does not perform S707 and other steps that will be introduced next, and the process ends .
  • the source network device may determine the time for initiating cell handover next time according to the recommended time information.
  • the source network device can initiate a cell handover again.
  • the source network device can determine the time for the next cell handover to be initiated by itself.
  • the source network device initiates the cell handover again, it does not need to execute S704 ⁇ S706, but executes S703 after executing S703.
  • S707 and other steps to be introduced next or, when the source network device initiates a cell handover again, it can continue to perform S704 (or, perform S705 and S706, or perform S704-S706) and subsequent steps after performing S703.
  • the source network device determines that the terminal device can perform cell handover, and the source network device can continue to perform the cell handover operation, that is, the source network device can perform S707 and connect Other steps that will be introduced next; and if the source network device does not receive the second information, the source network device determines that the terminal device cannot perform cell handover, or if the source network device does not receive the second information within the first time period, the source network device If the device determines that the terminal device cannot perform cell handover, the source network device may not continue to perform cell handover, that is, the source network device does not perform S707 and other steps that will be introduced next, and the process ends.
  • the start time of the first duration is, for example, the moment when the source network device sends the first information, and the duration of the first duration may be set by the source network device or specified by a protocol. However, if S704 is not executed, the first duration may not be considered.
  • the terminal device determines that the cell handover cannot be performed, it will not send the second information to the source network device. Therefore, the terminal device cannot suggest the time for the next cell handover to the source network device. Then, the source network device can determine the time for the next cell handover to be initiated by itself. When the source network device initiates the cell handover again, it does not need to perform S704 ⁇ S706, but performs S707 and other steps that will be introduced next after performing S703. Or, when the source network device initiates the cell handover again, it can continue to perform S704 (or, perform S705 and S706, or, perform S704-S706) and subsequent steps after performing S703.
  • the source network device can perform the cell handover operation after sending the first information to the terminal device, that is, the source network device can perform S707 and other steps that will be introduced next, or the source network device It is also possible to continue to perform the cell handover operation after sending the first information to the terminal device for the second duration, that is, the source network device can perform S707 and other steps that will be introduced next.
  • the second duration can be reserved for the terminal device as a buffer time. For example, the terminal device can perform some operations to minimize the packet loss rate.
  • the second duration can be specified by the protocol, or can also be set by the source network device.
  • the terminal device switches from the source network device to the target network device.
  • the terminal device switches from the first cell provided by the source network device to the second cell provided by the target network device.
  • the first cell is the serving cell before the terminal device is switched, and the second cell is the serving cell after the terminal device is switched.
  • the terminal device sends an RRC reconfiguration complete message to the target network device, and the target network device receives the RRC reconfiguration complete message from the terminal device.
  • the RRC reconfiguration complete message can instruct the terminal device to complete the cell handover.
  • the cell handover process of the terminal device may also involve other signaling, such as the interaction between the access network device and the core network device, etc., which are all included in the scope of the embodiments of this application, and the embodiments of this application do not Not written out one by one.
  • the cell switching operation may be performed as far as possible when it is determined that the terminal device can perform the cell switching. For example, if the terminal device has data being transmitted, the cell switching may not be performed. In this way, try to perform the cell switching process after the data transmission is completed, thereby reducing the data transmission delay and further reducing the packet loss rate. Moreover, after the source network device sends a handover request message to the target network device, the target network device is likely to not allow the terminal device to switch to the target network device.
  • the source network device is determining that the target network device allows the terminal device In the case of switching to the target network device, it is determined whether the terminal device can perform cell switching, thereby reducing invalid signaling interaction between the source network device and the terminal device, and saving signaling overhead.
  • FIG. 8A is a flowchart of this method.
  • the application of this method to the network architecture shown in FIG. 5 is taken as an example.
  • the method executed by the network device and the terminal device is taken as an example.
  • the terminal device described below may be the terminal device in the network architecture shown in FIG. 5, and the source network device described below It may be the access network device 1 in the network architecture shown in FIG. 5, and the target network device described below may be the access network device 2 in the network architecture shown in FIG. 5.
  • S801 The terminal device determines whether the terminal device can perform cell handover.
  • the terminal device determines that the terminal device cannot perform cell handover; or, if the current throughput rate of the terminal device is relatively small, such as less than the first threshold, the terminal device It is determined that the terminal device can perform cell handover.
  • the terminal device determines that the terminal device cannot perform cell switching Or, if the terminal device has no data to be transmitted, the terminal device determines that the terminal device can perform cell handover.
  • the terminal device determines that the terminal device cannot perform cell handover; or, if the terminal device does not have low power consumption requirements, the terminal device determines that the terminal device can perform cell handover.
  • the terminal device may also be uncertain whether the terminal device can perform cell handover, whether it can perform cell handover, and the source network device can determine it, then S801 does not need to be executed, so S801 is an optional step, which is used in Figure 8A The dotted line indicates.
  • the source network device obtains the first information.
  • the first information may indicate whether the terminal device can perform cell handover.
  • the first information may come from the terminal device.
  • the terminal device may determine whether the terminal device can perform cell handover according to the first information, and the terminal device may also send the first information to the source network device, and the source network device may also receive the first information. Even after the first information is obtained, the source network device can also determine whether the terminal device can perform cell handover according to the first information. Alternatively, the terminal device may determine the first information, but the terminal device does not determine whether the terminal device can perform cell handover based on the first information.
  • the terminal device may send the first information to the source network device, and the source network device receives the first information. After obtaining the first information, the source network device can determine whether the terminal device can perform cell handover according to the first information. In S802 in FIG. 8A, it is taken as an example that the first information is sent by the terminal device to the source network device.
  • the first information may also be determined by the source network device itself, and does not need to be sent by the terminal device.
  • the first information may be existing information, and it can be understood that the first information may implicitly indicate whether the terminal device can perform cell handover.
  • the first information may include one or more of the following information: throughput information of the terminal device, information about whether the terminal device has data to be transmitted, or information about whether the terminal device has low power consumption requirements. It can be understood that the first information includes one or more of the above information, and by indicating one or more of the above, it can implicitly indicate whether the terminal device can perform cell handover.
  • the first information may include throughput information of the terminal device; or, the first information may include information about whether the terminal device has data to be transmitted; or, the first information may include information about whether the terminal device has low power consumption requirements; or , The first information may include the throughput information of the terminal device, and information including whether the terminal device has data to be transmitted; or, the first information may include information about whether the terminal device has data to be transmitted, and whether the terminal device has low power. Information about consumption requirements; or, the first information may include throughput information of the terminal device, information about whether the terminal device has data to be transmitted, and information about whether the terminal device has low power consumption requirements, and so on.
  • the data to be transmitted by the terminal device may include the data to be transmitted by the terminal device, or the data to be received by the terminal device, or the data to be transmitted and the data to be received by the terminal device.
  • the source network device can determine the throughput information of the terminal device by itself, or the terminal device can also send the throughput information to the source network device.
  • the throughput rate information can directly indicate the throughput rate of the terminal device. If the throughput rate of the terminal device indicated by the throughput rate information is higher, for example, the throughput rate indicated by the throughput rate information is greater than or equal to the first threshold, it is considered that the terminal device’s throughput rate is greater than or equal to the first threshold.
  • the throughput rate is high, that is, the terminal device is considered to have a high throughput rate, indicating that the terminal device may have a large amount of data being transmitted, then the throughput rate information can implicitly indicate that the terminal device cannot perform cell handover.
  • the first information includes information that the terminal device has a high throughput rate; and if the throughput rate indicated by the throughput rate information is less than the first threshold, the throughput rate of the terminal device is considered to be low, that is, the terminal device is considered to have a low throughput rate.
  • Throughput rate indicates that the terminal device may not be transmitting data, then the throughput rate information can implicitly indicate that the terminal device can perform cell handover.
  • the first information includes that the terminal device has low throughput Rate information.
  • the throughput information can indicate the modulation and coding scheme (MCS) supported by the terminal device. The terminal device can send the MCS supported by the terminal device to the source network device.
  • MCS modulation and coding scheme
  • the throughput rate information can also implicitly indicate that the terminal device cannot perform cell handover, in this case .
  • the first information includes information that the terminal device has a high throughput rate; and if the MCS is lower than the first MCS, it can implicitly indicate that the terminal device’s throughput rate is low, and the terminal device may not be transmitting data. Then the throughput information can also implicitly indicate that the terminal device can perform cell handover. In this case, it can also be considered that the first information includes information that the terminal device has a low throughput rate.
  • the first MCS is, for example, the MCS allocated to the terminal device by the source network device, or may also be used exclusively as a reference MCS.
  • the source network device can determine whether the terminal device has data to be transmitted. For example, if the source network device has data to be sent to the terminal device and/or data to be received from the terminal device, it can be considered that the source network device determines that the terminal device has data to be transmitted. Information about the transmitted data. In this case, it can also be considered that the first information includes information about the data to be transmitted by the terminal device; or, the source network device has no data to be sent to the terminal device, and there is no data to be received from the terminal device.
  • the data of the terminal device can be regarded as information that the source network device has determined that the terminal device has no data to be transmitted. In this case, it can also be regarded that the first information includes information that the terminal device has no data to be transmitted.
  • the terminal device can determine whether the terminal device has information about data to be transmitted, and send the information about whether the terminal device has data to be transmitted to the source network device, and the information about whether the terminal device has data to be transmitted indicates that the terminal device has data to be transmitted. Or indicate that the terminal device has no data to be transmitted. If the terminal device has data to be transmitted, the information that the terminal device has data to be transmitted can implicitly indicate that the terminal device cannot perform cell handover; and if the terminal device has no data to be transmitted, then the terminal device has no information about the data to be transmitted. It can implicitly indicate that the terminal device can perform cell handover.
  • the data to be transmitted may be data of any priority (or any important level), that is, as long as the terminal device has data to be transmitted, the data is considered to be transmitted.
  • data may also refer to data whose priority is higher than the first priority (or the importance level is higher than the first priority), that is, if the terminal device has a priority higher than the first priority If the data needs to be transmitted, the terminal device is considered to have data to be transmitted. Otherwise, if the terminal device has data to be transmitted, but the priority of the data is lower than or equal to the first priority, it is considered that the terminal device has no data to be transmitted.
  • the data to be transmitted is the basic layer data of the first service
  • the first service is, for example, the XR service.
  • the priority of the basic layer data of the XR service may be higher than the first priority
  • the priority of the enhanced layer data of the XR service may be lower than or equal to the first priority.
  • the source network device can determine whether the terminal device has low power consumption information. For example, the source network device can determine whether the terminal device has low power consumption requirement according to the contract information of the terminal device; or the terminal device can also determine whether the terminal device has low power consumption.
  • the power consumption requirement information is sent to the source network device. If the terminal device has low power consumption requirements, it indicates that the terminal device needs to save power, and the cell switching may consume more power, and the terminal device may not be able to meet this requirement, then the information on whether the terminal device has low power consumption requirements can be It implicitly indicates that the terminal device cannot perform cell handover.
  • the first information includes the information that the terminal device has low power consumption requirements; and if the terminal device does not have low power consumption requirements, then whether the terminal device has The low power consumption requirement information can implicitly indicate that the terminal device can perform cell handover.
  • the first information includes information that the terminal device has no low power consumption requirement. It should be noted that if the terminal device does not have a low power consumption requirement, there may also be information that the terminal device does not have a low power consumption requirement, indicating that the terminal device does not have a low power consumption requirement. Or there is another possibility. If the terminal device does not have low power consumption requirements, there may not be information that the terminal device does not have low power consumption requirements.
  • the terminal device can report to the source network device.
  • Sending information that the terminal device has low power consumption requirements indicates that the terminal device has low power consumption requirements, and if the terminal device does not have low power consumption requirements, the terminal device will not send information to the source network device that the terminal device does not have low power consumption requirements.
  • the event that the terminal device does not send information is considered to indicate that the terminal device does not have low power consumption requirements; or, if the terminal device has low power consumption requirements, the contract information of the terminal device may include information that the terminal device has low power consumption requirements, indicating that the terminal device has low power consumption requirements.
  • the device has low power consumption requirements, and if the terminal device does not have low power consumption requirements, the contract information of the terminal device does not include the information that the terminal device does not have low power consumption requirements, and the source network device can determine that the terminal device does not have low power consumption requirements.
  • the source network device sends a handover request message to the target network device, and the target network device receives the handover request message from the source network device.
  • the handover request message can be used to request the terminal device to be switched to the target network device. From here on, it can be regarded as the source network device to perform the cell handover operation.
  • the source network device determines that the terminal device can perform cell handover according to the first information, S803 can be performed, and if the source network device determines that the terminal device cannot perform cell handover according to the first information, it does not need to perform S803, and the process ends. For example, the source network device may obtain the first information again after the third period of time to determine whether the terminal device can perform cell handover.
  • the third duration may be determined by the source network device itself, or the source network device may determine the third duration based on the first information, or the third duration may also be specified by an agreement.
  • the target network device performs admission control. That is, the target network device can determine whether to allow the terminal device to switch to the target network device.
  • the target network device sends a switching request response message to the source network device, and the source network device receives the switching request response message from the target network device.
  • the target network device can send a switching request response message to the source network device according to the result of the admission control.
  • the switching request response message can be used to instruct the target network device to allow the terminal device to switch to the target network device, or instruct the target network device to not allow the terminal device to switch to Target network device.
  • the source network device sends an RRC reconfiguration message to the terminal device, and the terminal device receives the RRC reconfiguration message from the source network device.
  • the source network device executes S806, and the RRC reconfiguration message can instruct the terminal device to switch from the source network device to the target network device. In addition, the source network device will also release the terminal device.
  • the source network device does not need to perform S806, and this cell handover process is terminated. For example, the source network device can search for the target network device again to initiate the cell handover process again.
  • the terminal device is switched from the source network device to the target network device.
  • the terminal device switches from the first cell provided by the source network device to the second cell provided by the target network device.
  • the first cell is the serving cell before the terminal device is switched
  • the second cell is the serving cell after the terminal device is switched.
  • the terminal device sends an RRC reconfiguration complete message to the target network device, and the target network device receives the RRC reconfiguration complete message from the terminal device.
  • the RRC reconfiguration complete message can instruct the terminal device to complete the cell handover.
  • the cell handover process of the terminal device may also involve other signaling, such as the interaction between the access network device and the core network device, etc., which are all included in the scope of the embodiments of this application, and the embodiments of this application do not Not written out one by one.
  • the cell switching operation may be performed as far as possible when it is determined that the terminal device can perform the cell switching. For example, if the terminal device has data being transmitted, the cell switching may not be performed. In this way, try to perform the cell switching process after the data transmission is completed, thereby reducing the data transmission delay and further reducing the packet loss rate.
  • the first information can implicitly indicate whether the terminal device can perform cell handover, without the terminal device sending special information to the network device to indicate, which helps to save signaling overhead.
  • FIG. 8B is a schematic diagram of displaying XR video content on the display screen of the mobile phone (a horizontal screen display is taken as an example).
  • the content of the XR video comes from the network device (such as a base station) that the mobile phone accesses, and the network device can be considered as the source network device of the mobile phone.
  • the mobile phone has XR service data being transmitted. If the source network device determines that the mobile phone needs to perform the cell handover, if according to the currently existing scheme, the source network device will directly start the cell handover process, the mobile phone also needs to cooperate with the source network device to perform the cell handover.
  • FIG. 8C is a schematic diagram of the XR video content displayed on the display screen of the mobile phone when the mobile phone is performing a cell handover.
  • the content of FIG. 8C is incomplete, and it can be understood that the display of FIG. 8C is stuck.
  • the target network device of the mobile phone may obtain the XR service data that the source network device has not sent to the mobile phone from the source network device, and the target network device may continue to send XR service data to the mobile phone.
  • part of the XR service data may be lost.
  • the more important XR basic layer service data may be lost.
  • the mobile phone may no longer perform XR service, and the user cannot continue to watch it.
  • the mobile phone may actively exit the application (APP) corresponding to the XR service, or the user can only choose to exit the application corresponding to the XR service.
  • FIG. 8D is a schematic diagram of the display content of the display screen of the mobile phone after the mobile phone exits the application corresponding to the XR service. For example, the desktop of the mobile phone is displayed at this time.
  • the source network device determines that the mobile phone needs to perform cell handover, the source network device can send the first information to the mobile phone, and the mobile phone receives the first information from the source network device, then the mobile phone can determine Currently, cell handover cannot be performed.
  • the mobile phone can send second information to the source network device to indicate that the terminal device cannot perform cell handover, or the mobile phone can also indicate that the mobile phone cannot perform cell handover by not sending the second information to the source network device.
  • the mobile phone can also choose to send the second information to the source network device to indicate that the mobile phone cannot perform cell handover, or the mobile phone can also send the second information to the source network device by not sending the second information to the source network device.
  • the mode indicates that the mobile phone cannot perform cell handover.
  • the source network device may temporarily not perform cell handover, so that the mobile phone can continue to perform the XR service for the user to watch.
  • the XR service of the mobile phone can continue.
  • the display time of the content shown in Figure 8B is the first moment.
  • Figure 8E which is the content of the XR video displayed on the display of the mobile phone after a period of time.
  • FIG. 9 is a schematic block diagram of a communication device 900 according to an embodiment of the application.
  • the communication device 900 is, for example, a network device 900.
  • the network device 900 can implement the function of the source network device described in the embodiment shown in FIG. 6 or the embodiment shown in FIG. 7.
  • the network device 900 includes a processing module 910, a sending module 920, and a receiving module 930.
  • the network device 900 may be a network device, or may be a chip applied to the network device or other combination devices, components, etc. that have the functions of the source network device described above.
  • the sending module 920 may be a transmitter
  • the receiving module 930 may be a receiver
  • the transmitter may include an antenna and a radio frequency circuit
  • the receiver may also include an antenna and a radio frequency circuit.
  • the transmitter and the receiver can collectively constitute a transceiver, and the transceiver can realize the functions of the transmitter and the receiver, or the transmitter and the receiver can also be two functional modules that are deployed separately.
  • the processing module 910 may include a processor, such as a baseband processor, and the baseband processor may include one or more central processing units (CPU).
  • the sending module 920 may be a radio frequency unit
  • the receiving module 930 may be a radio frequency unit
  • the processing module 910 may be a processor, such as a baseband processor.
  • the sending module 920 and the receiving module 930 may be input and output interfaces of a chip (such as a baseband chip), and the processing module 910 may be a processor of the chip system, and may include one or more central processing units.
  • the processing module 910 in the embodiment of the present application may be implemented by a processor or processor-related circuit components
  • the sending module 920 and the receiving module 930 may be implemented by a transceiver or transceiver-related circuit components.
  • the processing module 910 can be used to perform all operations performed by the source network device in the embodiment shown in FIG. 6 except for the transceiving operation, for example, determining that the terminal device can perform cell handover or cannot perform cell handover operations, and / Or other processes used to support the technology described herein.
  • the sending module 920 may be used to perform all the sending operations performed by the source network device in the embodiment shown in FIG. 6, such as S601, S604, and S607, and/or other processes used to support the technology described herein.
  • the receiving module 930 may be used to perform all receiving operations performed by the source network device in the embodiment shown in FIG. 6, such as S603 and S606, and/or other processes used to support the technology described herein.
  • the processing module 910 may be used to perform all operations performed by the source network device in the embodiment shown in FIG. 7 except for the transceiving operation, such as determining that the terminal device can perform cell handover or cannot perform cell handover operations, And/or other processes used to support the technology described herein.
  • the sending module 920 may be used to perform all the sending operations performed by the source network device in the embodiment shown in FIG. 7, such as S701, S704, and S707, and/or other processes used to support the technology described herein.
  • the receiving module 930 may be used to perform all receiving operations performed by the source network device in the embodiment shown in FIG. 7, such as S603 and S706, and/or other processes used to support the technology described herein.
  • the sending module 920 and the receiving module 930 may be a functional module, which is called a transceiver module.
  • the transceiver module can complete both the sending operation and the receiving operation.
  • the transceiver module can be used to perform the embodiment shown in FIG. 6 Or all the sending operations and receiving operations performed by the source network device in the embodiment shown in FIG. 7, for example, when performing a sending operation, the transceiver module can be considered as the sending module 920, and when performing a receiving operation, it can be considered as the transceiver module.
  • the module is the receiving module 930; or, the sending module 920 and the receiving module 930 can also be two functional modules.
  • the transceiver module can be regarded as a collective term for these two functional modules.
  • the sending module 920 is used to complete the sending operation.
  • the sending module 920 can For performing all the sending operations performed by the source network device in the embodiment shown in FIG. 6 or the embodiment shown in FIG. 7, the receiving module 930 is used to complete receiving operations.
  • the receiving module 930 may be used to perform the operations shown in FIG. All receiving operations performed by the source network device in the illustrated embodiment or the embodiment illustrated in FIG. 7.
  • the sending module 920 is configured to send first information to a terminal device, where the first information is used to inquire whether the terminal device can perform cell handover;
  • the processing module 910 is configured to perform a cell handover operation when it is determined according to the first information that the terminal device can perform a cell handover.
  • the processing module 910 is configured to determine that the terminal device can perform cell handover according to the first information in the following manner:
  • the receiving module 930 receives second information from the terminal device in response to the first information, where the second information is used to indicate that the terminal device can perform cell handover.
  • the processing module 910 is configured to determine that the terminal device can perform cell handover according to the first information in the following manner:
  • the terminal device By receiving the second information from the terminal device in response to the first information through the receiving module 930, it is determined that the terminal device can perform cell handover.
  • the processing module 910 is configured to perform a cell handover operation in the following manner:
  • the sending module 920 sends an RRC reconfiguration message to the terminal device, where the RRC reconfiguration message is used to instruct the terminal device to switch to the target network device.
  • the sending module 920 is further configured to send a handover request message to the target network device before sending the first information to the terminal device, where the handover request message is used to request to switch the terminal device to the target network device;
  • the receiving module 930 is further configured to receive a handover request confirmation message from the target network device, where the handover request confirmation message is used to confirm the handover of the terminal device to the target network device.
  • the processing module 910 is configured to perform a cell handover operation in the following manner:
  • the sending module 920 sends an RRC reconfiguration message to the terminal device, where the RRC reconfiguration message is used to instruct the terminal device to switch to the target network device.
  • the processing module 910 is further configured to not perform the cell handover operation when it is determined according to the first information that the terminal device cannot perform the cell handover.
  • the processing module 910 is configured to determine that the terminal device cannot perform cell handover according to the first information in the following manner:
  • the receiving module 930 receives second information from the terminal device in response to the first information, where the second information is used to indicate that the terminal device cannot perform cell handover.
  • the processing module 910 is configured to determine that the terminal device cannot perform cell handover according to the first information in the following manner:
  • FIG. 10 is a schematic block diagram of a communication device 1000 according to an embodiment of the application.
  • the communication device 1000 is, for example, a terminal device 1000.
  • the terminal device 1000 can implement the functions of the terminal device described in the embodiment shown in FIG. 6 or the embodiment shown in FIG. 7.
  • the terminal device 1000 includes a processing module 1010, a sending module 1020, and a receiving module 1030. Regarding the implementation of the terminal device 1000, reference may be made to the introduction of the implementation of the network device 900.
  • the processing module 1010 may be used to perform all operations performed by the terminal device in the embodiment shown in FIG. 6 except for the transceiving operations, such as S602 and S608, and/or other operations used to support the technology described herein. process.
  • the sending module 1020 may be used to perform all the sending operations performed by the terminal device in the embodiment shown in FIG. 6, such as S603 and S609, and/or other processes used to support the technology described herein.
  • the receiving module 1030 may be used to perform all receiving operations performed by the terminal device in the embodiment shown in FIG. 6, such as S601 and S607, and/or other processes used to support the technology described herein.
  • the processing module 1010 may be used to perform all operations other than the transceiving operations performed by the terminal device in the embodiment shown in FIG. 7, such as S705 and S708, and/or to support the technology described herein.
  • the sending module 1020 may be used to perform all the sending operations performed by the terminal device in the embodiment shown in FIG. 7, such as S706 and S709, and/or other processes used to support the technology described herein.
  • the receiving module 1030 may be used to perform all receiving operations performed by the terminal device in the embodiment shown in FIG. 7, such as S704 and S707, and/or other processes used to support the technology described herein.
  • the receiving module 1030 is configured to receive first information from a source network device, and the first information is used to inquire whether the terminal device 1000 can perform cell handover;
  • the sending module 1020 is configured to send second information to the source network device when the processing module 1010 determines that the terminal device 1000 can perform cell handover, so as to indicate that the terminal device 1000 can perform cell handover.
  • the second information is used to indicate that the terminal device 1000 can perform cell handover; or,
  • the sending module 1020 is further configured to send the second information, where the event of sending the second information is used to indicate that the terminal device 1000 can perform cell handover.
  • the processing module 1010 is configured to determine that the terminal device 1000 can perform cell handover in the following manner:
  • the terminal device 1000 According to the fact that there is no basic layer data to be received and to be sent, it is determined that the terminal device 1000 can perform cell handover, the basic layer data corresponds to the first service, and the basic layer data is data necessary for executing the first service.
  • the sending module 1020 is further configured to send second information to the source network device when the processing module 1010 determines that the terminal device 1000 cannot perform cell handover, where the second information is used for It indicates that the terminal device 1000 cannot perform cell handover.
  • the sending module 1020 is further configured to not send the second information to the source network device when the processing module 1010 determines that the terminal device 1000 cannot perform cell handover, where the second information is It indicates that the terminal device 1000 can perform cell handover.
  • the processing module 1010 is configured to determine that the terminal device 1000 cannot perform cell handover in the following manner:
  • the basic layer data corresponds to the first service, and the basic layer data is data necessary for executing the first service.
  • processing module 1010 For the specific functions that can be implemented by the processing module 1010, the sending module 1020, and the receiving module 1030, reference may be made to the introduction of the embodiment shown in FIG. 6 or the embodiment shown in FIG. 7, and will not be repeated here.
  • FIG. 11 is a schematic block diagram of a communication device 1100 according to an embodiment of the application.
  • the communication device 1100 is, for example, a network device 1100.
  • the network device 1100 can implement the function of the source network device described in the embodiment shown in FIG. 6 or the embodiment shown in FIG. 7 or the embodiment shown in FIG. 8A.
  • the network device 1100 includes a processing module 1110 and a receiving module 1130.
  • the network device 1100 may further include a sending module 1120.
  • the processing module 1110 can be used to perform all operations performed by the source network device in the embodiment shown in FIG. 6 except for the transceiving operation, such as determining that the terminal device can perform cell handover or cannot perform cell handover operations, and / Or other processes used to support the technology described herein.
  • the sending module 1120 may be used to perform all the sending operations performed by the source network device in the embodiment shown in FIG. 6, such as S601, S604, and S607, and/or other processes used to support the technology described herein.
  • the receiving module 1130 may be used to perform all receiving operations performed by the source network device in the embodiment shown in FIG. 6, such as S603 and S606, and/or other processes used to support the technology described herein.
  • the processing module 1110 may be used to perform all operations performed by the source network device in the embodiment shown in FIG. 7 except for the transceiving operations, for example, determining that the terminal device can perform cell handover or cannot perform cell handover operations, And/or other processes used to support the technology described herein.
  • the sending module 1120 may be used to perform all the sending operations performed by the source network device in the embodiment shown in FIG. 7, such as S701, S704, and S707, and/or other processes used to support the technology described herein.
  • the receiving module 1130 may be used to perform all receiving operations performed by the source network device in the embodiment shown in FIG. 7, such as S603 and S706, and/or other processes used to support the technology described herein.
  • the processing module 1110 may be used to perform all operations performed by the source network device in the embodiment shown in FIG. 8A except for the transceiving operation, such as determining that the terminal device can perform cell handover or cannot perform cell handover operations, And/or other processes used to support the technology described herein.
  • the sending module 1120 may be used to perform all the sending operations performed by the source network device in the embodiment shown in FIG. 8A, such as S803 and S806, and/or other processes used to support the technology described herein.
  • the receiving module 1130 may be used to perform all receiving operations performed by the source network device in the embodiment shown in FIG. 8A, such as S802 and S805, and/or other processes used to support the technology described herein.
  • the receiving module 1130 is configured to receive the second information from the terminal device
  • the processing module 1110 is configured to not perform a cell handover operation when the second information indicates that the terminal device cannot perform cell handover.
  • the sending module 1120 is configured to send first information to the terminal device, where the first information is used to inquire whether the terminal device can perform cell handover.
  • the processing module 1110 is further configured to perform the cell handover operation when the second information indicates that the terminal device can perform cell handover.
  • processing module 1110 the sending module 1120, and the receiving module 1130
  • FIG. 12 is a schematic block diagram of a communication device 1200 according to an embodiment of the application.
  • the communication apparatus 1200 is a terminal device 1200, for example.
  • the terminal device 1200 can implement the functions of the terminal device described in the embodiment shown in FIG. 6 or the embodiment shown in FIG. 7 or the embodiment shown in FIG. 8A.
  • the terminal device 1200 includes a processing module 1210 and a sending module 1220.
  • the terminal device 1200 may further include a receiving module 1230.
  • the processing module 1210 may be used to perform all operations performed by the terminal device in the embodiment shown in FIG. 6 except for the transceiving operations, such as S602 and S608, and/or other operations used to support the technology described herein. process.
  • the sending module 1220 may be used to perform all the sending operations performed by the terminal device in the embodiment shown in FIG. 6, such as S603 and S609, and/or other processes used to support the technology described herein.
  • the receiving module 1230 may be used to perform all receiving operations performed by the terminal device in the embodiment shown in FIG. 6, such as S601 and S607, and/or other processes used to support the technology described herein.
  • the processing module 1210 may be used to perform all operations other than the transceiving operations performed by the terminal device in the embodiment shown in FIG. 7, such as S705 and S708, and/or to support the technology described herein.
  • the sending module 1220 may be used to perform all the sending operations performed by the terminal device in the embodiment shown in FIG. 7, such as S706 and S709, and/or other processes used to support the technology described herein.
  • the receiving module 1230 may be used to perform all receiving operations performed by the terminal device in the embodiment shown in FIG. 7, such as S704 and S707, and/or other processes used to support the technology described herein.
  • the processing module 1210 can be used to perform all operations performed by the terminal device in the embodiment shown in FIG. 8A except for the transceiving operations, such as S801 and S807, and/or to support the technology described herein.
  • the sending module 1220 may be used to perform all the sending operations performed by the source network device in the embodiment shown in FIG. 8A, such as S802 and S808, and/or other processes used to support the technology described herein.
  • the receiving module 1230 may be used to perform all receiving operations performed by the terminal device in the embodiment shown in FIG. 8A, such as S806, and/or other processes used to support the technology described herein.
  • the sending module 1220 is used to send the second information to the source network device
  • the processing module 1210 is configured to not perform a cell handover operation when the second information indicates that the terminal device 1200 cannot perform a cell handover.
  • the receiving module 1230 is configured to receive first information from the source network device, where the first information is used to inquire whether the terminal device 1200 can perform cell handover.
  • the processing module 1210 is further configured to perform the cell handover operation when the second information indicates that the terminal device 1200 can perform the cell handover.
  • processing module 1210 the sending module 1220, and the receiving module 1230
  • FIG. 13 is a schematic block diagram of a communication device 1300 according to an embodiment of the application.
  • the communication apparatus 1100 is a network device 1300, for example.
  • the network device 1300 can implement the function of the source network device described in the embodiment shown in FIG. 6 or the embodiment shown in FIG. 7.
  • the network device 1300 includes a processing module 1310 and a receiving module 1330.
  • the network device 1300 may further include a sending module 1320.
  • the processing module 1310 can be used to perform all operations performed by the source network device in the embodiment shown in FIG. 6 except for the transceiving operation, for example, determining that the terminal device can perform cell handover or cannot perform cell handover operations, and / Or other processes used to support the technology described herein.
  • the sending module 1320 may be used to perform all the sending operations performed by the source network device in the embodiment shown in FIG. 6, such as S601, S604, and S607, and/or other processes used to support the technology described herein.
  • the receiving module 1330 may be used to perform all receiving operations performed by the source network device in the embodiment shown in FIG. 6, such as S603 and S606, and/or other processes used to support the technology described herein.
  • the processing module 1310 may be used to perform all operations performed by the source network device in the embodiment shown in FIG. 7 except for the transceiving operation, for example, determining that the terminal device can perform cell handover or cannot perform cell handover operations, And/or other processes used to support the technology described herein.
  • the sending module 1320 may be used to perform all the sending operations performed by the source network device in the embodiment shown in FIG. 7, such as S701, S704, and S707, and/or other processes used to support the technology described herein.
  • the receiving module 1330 may be used to perform all receiving operations performed by the source network device in the embodiment shown in FIG. 7, such as S603 and S706, and/or other processes used to support the technology described herein.
  • the receiving module 1330 is configured to not receive the second information from the terminal device
  • the processing module 1310 is configured to determine that the terminal device cannot perform cell handover according to an event of not receiving the second information from the terminal device;
  • the processing module 1310 is also used to not perform cell handover operations.
  • the receiving module 1330 is further configured to receive the second information from the terminal device
  • the processing module 1310 is further configured to determine that the terminal device can perform cell handover according to an event of receiving the second information from the terminal device;
  • the processing module 1310 is also used to perform cell handover operations.
  • the sending module 1320 is configured to send first information to the terminal device, where the first information is used to inquire whether the terminal device can perform cell handover.
  • processing module 1310 the sending module 1320, and the receiving module 1330
  • FIG. 14 is a schematic block diagram of a communication device 1400 according to an embodiment of the application.
  • the communication device 1400 is, for example, a terminal device 1400.
  • the terminal device 1400 can implement the functions of the terminal device described in the embodiment shown in FIG. 6 or the embodiment shown in FIG. 7.
  • the terminal device 1400 includes a processing module 1410 and a sending module 1420.
  • the terminal device 1400 may further include a receiving module 1430.
  • the processing module 1410 may be used to perform all operations other than the transceiving operations performed by the terminal device in the embodiment shown in FIG. 6, such as S602 and S608, and/or other operations used to support the technology described herein. process.
  • the sending module 1420 may be used to perform all the sending operations performed by the terminal device in the embodiment shown in FIG. 6, such as S603 and S609, and/or other processes used to support the technology described herein.
  • the receiving module 1430 may be used to perform all receiving operations performed by the terminal device in the embodiment shown in FIG. 6, such as S601 and S607, and/or other processes used to support the technology described herein.
  • the processing module 1410 may be used to perform all operations other than the transceiving operations performed by the terminal device in the embodiment shown in FIG. 7, such as S705 and S708, and/or to support the technology described herein.
  • the sending module 1420 may be used to perform all the sending operations performed by the terminal device in the embodiment shown in FIG. 7, such as S706 and S709, and/or other processes used to support the technology described herein.
  • the receiving module 1430 may be used to perform all receiving operations performed by the terminal device in the embodiment shown in FIG. 7, such as S704 and S707, and/or other processes used to support the technology described herein.
  • processing module 1410 is used to determine that the terminal device 1400 cannot perform cell handover
  • the sending module 1420 is configured to not send the second information to the source network device to indicate that the terminal device 1400 cannot perform cell handover.
  • the processing module 1410 is further configured to determine that the terminal device 1400 can perform cell handover;
  • the sending module 1420 is further configured to send the second information to the source network device to instruct the terminal device 1400 to be able to perform cell handover.
  • the processing module 1410 is also used to perform a cell handover operation.
  • the receiving module 1430 is configured to receive first information from the source network device, where the first information is used to inquire whether the terminal device 1400 can perform cell handover.
  • processing module 1410 the sending module 1420, and the receiving module 1430
  • the embodiment of the present application also provides a communication device, and the communication device may be a terminal device or a circuit.
  • the communication device may be used to perform the actions performed by the terminal device in the foregoing method embodiments.
  • FIG. 15 shows a simplified schematic diagram of the structure of the terminal device. It is easy to understand and easy to illustrate.
  • the terminal device uses a mobile phone as an example.
  • the terminal equipment includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal.
  • the antenna is 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, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices 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 to the outside in the form of electromagnetic waves through the antenna.
  • 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, and the processor converts the baseband signal into data and processes the data.
  • FIG. 15 only one memory and processor are shown in FIG. 15. In an actual terminal 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 storage device.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.
  • the antenna and radio frequency circuit with transceiving functions can be regarded as the transceiving unit of the terminal device (the transceiving unit can be a functional unit that can realize the sending and receiving functions; alternatively, the transceiving unit can also be It includes two functional units, namely a receiving unit capable of realizing the receiving function and a transmitting unit capable of realizing the transmitting function), and the processor with the processing function is regarded as the processing unit of the terminal device.
  • the terminal device includes a transceiver unit 1510 and a processing unit 1520.
  • the transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, and so on.
  • the processing unit may also be called a processor, a processing board, a processing module, a processing device, and so on.
  • the device for implementing the receiving function in the transceiver unit 1510 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 1510 as the sending unit, that is, the transceiver unit 1510 includes a receiving unit and a sending unit.
  • the transceiver unit may sometimes be referred to as a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may sometimes be referred to as a receiver, a receiver, or a receiving circuit.
  • the sending unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.
  • the transceiving unit 1510 is configured to perform the sending operation and the receiving operation on the terminal device side in any one of the above-mentioned embodiment shown in FIG. 6 to the embodiment shown in FIG. In any one of the embodiments shown in FIG. 6 to the embodiment shown in FIG. 8A, the terminal device side performs other operations except for the receiving and sending operations.
  • the device may include a transceiver unit and a processing unit.
  • the transceiver unit may be an input/output circuit and/or a communication interface;
  • the processing unit is an integrated processor or microprocessor or integrated circuit.
  • the device shown in FIG. 16 can be referred to.
  • the device can perform functions similar to the processing module 1010 in FIG. 10.
  • the device can perform functions similar to the processing module 1210 in FIG. 12.
  • the device can perform functions similar to the processing module 1410 in FIG. 14.
  • the device includes a processor 1610, a data sending processor 1620, and a data receiving processor 1630.
  • the processing module 1010 in the foregoing embodiment may be the processor 1610 in FIG. 16 and complete the corresponding function; the sending module 1020 in the foregoing embodiment may be the sending data processor 1620 in FIG.
  • the receiving module 1030 in the above-mentioned embodiment may be the receiving data processor 1630 in FIG. 16, and completes the corresponding function.
  • the processing module 1210 in the foregoing embodiment may be the processor 1610 in FIG. 16 and complete corresponding functions; the sending module 1220 in the foregoing embodiment may be the sending data processor 1620 in FIG. 16 and complete the corresponding functions.
  • the function; the receiving module 1230 in the above-mentioned embodiment may be the receiving data processor 1630 in FIG. 16 and complete the corresponding function.
  • the processing module 1410 in the foregoing embodiment may be the processor 1610 in FIG. 16 and complete corresponding functions; the sending module 1420 in the foregoing embodiment may be the sending data processor 1620 in FIG.
  • the receiving module 1430 in the above-mentioned embodiment may be the receiving data processor 1630 in FIG. 16, and complete the corresponding function.
  • the channel encoder and the channel decoder are shown in FIG. 16, it can be understood that these modules do not constitute a restrictive description of this embodiment, and are only illustrative.
  • Fig. 17 shows another form of this embodiment.
  • the processing device 1700 includes modules such as a modulation subsystem, a central processing subsystem, and a peripheral subsystem.
  • the communication device in this embodiment can be used as a modulation subsystem therein.
  • the modulation subsystem may include a processor 1703 and an interface 1704.
  • the processor 1703 completes the functions of the aforementioned processing module 1010
  • the interface 1704 completes the aforementioned functions of the sending module 1020 and the receiving module 1030.
  • the processor 1703 completes the functions of the aforementioned processing module 1210
  • the interface 1704 completes the aforementioned functions of the sending module 1220 and the receiving module 1230.
  • the processor 1703 completes the functions of the aforementioned processing module 1410, and the interface 1704 completes the aforementioned functions of the sending module 1420 and the receiving module 1430.
  • the modulation subsystem includes a memory 1706, a processor 1703, and a program stored on the memory 1706 and running on the processor. When the processor 1703 executes the program, the terminal device side in the above method embodiment is implemented. Methods. It should be noted that the memory 1706 can be non-volatile or volatile, and its location can be located inside the modulation subsystem or in the processing device 1700, as long as the memory 1706 can be connected to the The processor 1703 is fine.
  • the device 1800 includes one or more radio frequency units, such as a remote radio unit (RRU) 1810 and one or more baseband units (BBU) (also referred to as digital units, digital units, DU) 1820 .
  • the RRU 1810 may be called a transceiver module, and the transceiver module may include a sending module and a receiving module, or the transceiver module may be a module that can realize the functions of sending and receiving.
  • the transceiver module may correspond to the sending module 920 and the receiving module 930 in FIG. 9. Alternatively, the transceiver module may correspond to the sending module 1120 and the receiving module 1130 in FIG. 11.
  • the transceiver module may correspond to the sending module 1320 and the receiving module 1330 in FIG. 13.
  • the transceiver module may also be called a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 1811 and a radio frequency unit 1812.
  • the RRU 1810 part is mainly used for sending and receiving of radio frequency signals and conversion of radio frequency signals and baseband signals, for example, for sending instruction information to terminal equipment.
  • the 1820 part of the BBU is mainly used to perform baseband processing, control the base station, and so on.
  • the RRU 1810 and the BBU 1820 may be physically set together, or may be physically separated, that is, a distributed base station.
  • the BBU 1820 is the control center of the base station, and may also be called a processing module, and may correspond to the processing module 910 in FIG. 9, or may correspond to the processing module 1110 in FIG. 11, or may be the same as the processing module 1310 in FIG.
  • BBU1820 (processing module) is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spread spectrum and so on.
  • the BBU (processing module) may be used to control the base station to execute the operation procedure of the network device in the foregoing method embodiment, for example, to generate the foregoing indication information.
  • the BBU 1820 may be composed of one or more single boards, and multiple single boards may jointly support a radio access network with a single access standard (such as an LTE network), or support different access standards. Wireless access network (such as LTE network, 5G network or other networks).
  • the BBU 1820 also includes a memory 1821 and a processor 1822.
  • the memory 1821 is used to store necessary instructions and data.
  • the processor 1822 is used to control the base station to perform necessary actions, for example, used to control the base station to execute the operation procedure of the network device in the foregoing method embodiment.
  • the memory 1821 and the processor 1822 may serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.
  • processors mentioned in the embodiments of this application may be a CPU, other general-purpose processors, digital signal processors (digital signal processors, DSP), application specific integrated circuits (ASICs), ready-made Field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • dynamic RAM dynamic RAM
  • DRAM dynamic random access memory
  • synchronous dynamic random access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory serial DRAM, SLDRAM
  • direct rambus RAM direct rambus RAM, DR RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component
  • the memory storage module
  • the size of the sequence numbers of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed system, device, and method can be implemented in other ways.
  • the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, 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 the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned computer-readable storage medium may be any available medium that can be accessed by a computer.
  • computer-readable media may include random access memory (RAM), read-only memory (ROM), and electrically erasable programmable read-only memory (electrically erasable programmable read-only memory).
  • RAM random access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • USB flash disk universal serial bus flash disk
  • mobile hard disk or other optical disk storage
  • disk storage A medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention se rapporte à un procédé et à des dispositifs de communication. De premières informations sont envoyées à un équipement terminal, les premières informations étant utilisées pour interroger si l'équipement terminal peut réaliser un transfert intercellulaire ; et s'il est déterminé selon les premières informations que l'équipement terminal peut réaliser un transfert de cellule, une opération de transfert de cellule est réalisée. Dans des modes de réalisation de la présente invention, le dispositif réseau peut envoyer les premières informations à l'équipement terminal, et l'opération de transfert de cellule est réalisée uniquement s'il est déterminé selon les premières informations que l'équipement terminal peut réaliser un transfert de cellule, réduisant ainsi le retard de transmission de données, réduisant ainsi le taux de perte de paquet.
PCT/CN2021/097698 2020-06-13 2021-06-01 Procédé et dispositifs de communication Ceased WO2021249244A1 (fr)

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CN202010538519 2020-06-13
CN202010538519.0 2020-06-13
CN202010730139.7A CN113810964B (zh) 2020-06-13 2020-07-27 一种通信方法及设备
CN202010730139.7 2020-07-27

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CN117915129A (zh) * 2024-03-20 2024-04-19 天津师范大学 基于跨层网络信息的流媒体传输方法、装置和存储介质

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