WO2022032687A1 - Procédé de communication et appareil de communication - Google Patents

Procédé de communication et appareil de communication Download PDF

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Publication number
WO2022032687A1
WO2022032687A1 PCT/CN2020/109372 CN2020109372W WO2022032687A1 WO 2022032687 A1 WO2022032687 A1 WO 2022032687A1 CN 2020109372 W CN2020109372 W CN 2020109372W WO 2022032687 A1 WO2022032687 A1 WO 2022032687A1
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WO
WIPO (PCT)
Prior art keywords
cell
terminal device
network device
history information
movement history
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PCT/CN2020/109372
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English (en)
Chinese (zh)
Inventor
胡星星
张宏平
Original Assignee
华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2020/109372 priority Critical patent/WO2022032687A1/fr
Priority to CN202080103914.4A priority patent/CN116097737A/zh
Publication of WO2022032687A1 publication Critical patent/WO2022032687A1/fr

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

Definitions

  • the present application relates to the field of communication, and more particularly, to a communication method and communication device.
  • the terminal device or the network device records the movement history information of the terminal device.
  • the target network device starts recording the movement history information of the terminal device when it receives the handover request message.
  • the terminal device may not yet switch to the target network device, so it is unreasonable for the target network device to start recording the movement history information of the terminal device when it receives the handover request message.
  • the time when the source network device sends the handover request message to the target network device and the time when the terminal device selects the target cell (that is, a candidate cell) to access may be quite different. If the target network It is unreasonable for the device to start recording the movement history information of the terminal device from the moment of receiving the handover request message.
  • DAPS HO dual active protocol stack handover
  • the terminal device is connected to both the source network device (or source cell) and the target network device (or target cell) for a period of time , so it is unreasonable for the target network device to start recording the movement history information of the terminal device after receiving the handover request message.
  • the present application provides a communication method in order to obtain more accurate movement history information of a terminal device.
  • a first aspect provides a method of communication, the method comprising: the first network device determines that the terminal device is replaced to the first cell, and the replacement includes dual activation protocol stack DAPS handover, conditional handover CHO or radio resource control RRC re-establishment; The first network device starts to record the first movement history information, where the first movement history information is the history information of the terminal device in the first cell, after determining the time when the terminal device is changed to the first cell or after.
  • the target network device ie the first network device or the target cell (the first cell) determines that the terminal device is to be changed to the target cell (ie the first network device).
  • start recording the movement history information of the terminal device that is, start recording the history information of the terminal device in the target cell, so that more accurate movement history information of the terminal device can be recorded, so that the target network device can know more Accurate end-device movement to allow for more accurate optimizations.
  • the determining, by the first network device, that the terminal device is to be changed to the first cell includes: the first network device determining that the terminal device succeeds in random access in the first cell In the case of , it is determined that the terminal device is replaced to the first cell; the first network device starts recording the first movement history information at or after the time when the terminal device is determined to be replaced to the first cell, including: the first network device After it is determined that the terminal device succeeds in random access to the first cell, the recording of the first movement history information is started.
  • the first network device determining that the terminal device is replaced to the first cell includes: the first network device sends the first indication In the case of information, it is determined that the terminal device is replaced to the first cell, and the first indication information is used to instruct the terminal device to disconnect the connection with the second cell; the first network device determines that the terminal device is replaced to the first cell.
  • starting to record the first movement history information includes: the first network device starts recording the first movement history information at or after the time when the first indication information is sent.
  • the first network device determining that the terminal device is replaced to the first cell includes: the first network device sends the second indication In the case of information, it is determined that the terminal device is replaced to the first cell, and the second indication information is used to instruct the second cell or the second network device to release the context of the terminal device; the first network device determines that the terminal device is replaced At or after the time of the first cell, starting to record the first movement history information includes: the first network device starts recording the first movement history information at or after the time when the second indication information is sent.
  • the first movement history information further includes third indication information, where the third indication information is used to instruct the terminal device to switch from the first cell in a DAPS handover manner Switch to the third cell.
  • the third indication information is further used to indicate a first time period, where the first time period indicates that the terminal device stays in the first cell and the first cell simultaneously during the DAPS handover process.
  • the duration of the third cell is further used to indicate a first time period, where the first time period indicates that the terminal device stays in the first cell and the first cell simultaneously during the DAPS handover process.
  • the first network device determining that the terminal device is replaced to the first cell includes: the first network device sends the handover success message after the In this case, it is determined that the terminal device is replaced to the first cell; the first network device starts recording the first movement history information at or after the time when the terminal device is determined to be replaced to the first cell, including: the first network device is in At or after the handover success message is sent, the first movement history information starts to be recorded.
  • the first network device determining that the terminal device is replaced to the first cell includes: the first network device transfers the state after receiving the sequence number. In the case of a message, it is determined that the terminal device is replaced to the first cell; the first network device starts recording the first movement history information at or after the time when the terminal device is determined to be replaced to the first cell, including: the first network device The device starts recording the first movement history information at or after receiving the serial number state transition message.
  • the method further includes: the first network device sending the first movement history information to a third network device, where the first movement history information includes a second time period, The second time period is the length of time that the terminal device stays in the first cell.
  • the method before the first network device determines that the terminal device is to be changed to the first cell, the method further includes: the first network device receives a handover from the second network device request message, the handover request message includes second movement history information, the second movement history information is recorded by the second network device, the second movement history information includes a third time period, and the third time period is at the terminal device Duration of staying in the second cell; the first network device will compensate into the third time period from the period of time from receiving the handover request message to determining that the terminal device is to be changed to the first cell.
  • the target network device can modify the time that the terminal device stays in the source cell (the second cell) received in the handover request message, that is, the compensation for the time from receiving the handover request message to the time when the terminal device successfully switches to the target cell
  • the target network device can obtain more accurate historical information of the terminal device in the source cell, so as to perform some optimizations more accurately.
  • a communication method is provided, which is applied in a dual activation protocol stack handover process, the method comprising: a terminal device determines to switch from a second cell to a first cell; the terminal device determines to switch from the second cell At or after the time of the first cell, record fourth movement history information, the fourth movement history information is the history information of the terminal device in the second cell, the fourth movement history information includes a fourth period, the fourth movement history The time period is the time spent in the second cell; the terminal device determining to switch from the first cell to the second cell includes: the terminal device determining to switch from the second cell to the second cell in the case of receiving the first indication information In a cell, the first indication information is used to instruct the terminal device to disconnect from the second cell; the terminal device records the fourth movement history at or after the moment of switching from the second cell to the first cell The information includes: the terminal device records the fourth movement history information at or after the time when the terminal device receives the first indication information.
  • the terminal device when the terminal device determines that the handover from the source cell (the second cell) to the target cell (the first cell) is successful, the terminal device records the historical information (that is, the first cell) in the source cell's history information. 3 Movement history information), so that more accurate movement history information of the terminal device can be recorded, so that the network device can know the more accurate movement situation of the terminal device, so as to perform some optimization more accurately.
  • the fourth time period includes the time that the terminal device stays in the second cell before receiving the first indication information.
  • the method further includes:
  • the terminal device determines that the random access to the first cell is successful, the terminal device starts to record a fifth time period, and the fifth time period is the time that the terminal device stays in the first cell.
  • the method further includes:
  • the terminal device When the terminal device receives the first indication information, it starts to record a fifth time period, and the fifth time period is the time that the terminal device stays in the first cell.
  • the fourth movement history information further includes fourth indication information, where the fourth indication information is used to instruct the terminal device to switch from the second cell to the second cell in a DAPS handover manner. Handover to the first cell.
  • the fourth indication information is further used to indicate a sixth time period, where the sixth time period indicates that the terminal device stays in the first cell and the all Describe the duration of the second cell.
  • a communication method comprising: a centralized unit CU-control plane CP entity sending a minimum drive test MDT measurement result to a tracking collection entity TCE or a core network CN;
  • the CU-CP entity sends the coexistence IDC information in the device detected by the terminal device to the TCE or the CN.
  • the CU-CP sends the MDT measurement results and IDC information to the TCE, and the TCE can obtain whether the MDT measurement results are affected by IDC interference, so that the MDT measurement results can be more accurately analyzed.
  • the method further includes: the CU-CP entity receiving a cell traffic tracking message from the distributed unit DU or the CU-user plane UP entity; the CU-CP entity Sending the coexistence IDC information in the device detected by the terminal device to the TCE or the CN includes: in the case of receiving the cell service tracking message, the CU-CP entity sends the TCE or the CN the information detected by the terminal device. IDC information.
  • the cell service tracking message includes the MDT measurement result.
  • the IDC information includes at least one of the following: whether the terminal device detects the IDC, the frequency points corresponding to which cells the terminal device detects the IDC, the detected IDC start time and end time, and the duration of IDC detection.
  • the MDT measurement result includes a start time and an end time for collecting the MDT measurement result.
  • the cell service tracking message includes a tracking identifier and an Internet Protocol IP address of the TCE entity, where the tracking identifier includes a tracking reference and a tracking record session reference.
  • the cell service tracking message includes a request message for requesting the CU-CP entity to report the IDC information detected by the terminal device.
  • the CU-CP entity receives indication information from a terminal device, where the indication information is used to indicate the IDC information detected by the terminal device.
  • the indication information is further used to indicate the frequency point information corresponding to the frequency point where the terminal device detects the IDC interference, or the indication information is used to indicate which frequency point IDC interference detected.
  • the indication information is further used to indicate the direction in which the terminal device detects the IDC interference.
  • a communication device in a fourth aspect, may be a network device, or a component in a network device.
  • the communication apparatus may include various modules or units for performing the method in the first aspect and any possible implementation manner of the first aspect.
  • a communication apparatus including a processor.
  • the processor is coupled to the memory and can be used to execute instructions in the memory to implement the method in any one of the possible implementations of the first aspect above.
  • the communication device further includes a memory.
  • the communication device further includes a communication interface, the processor is coupled to the communication interface, the communication interface is used for inputting and/or outputting information, and the information includes at least one of instructions and data.
  • the communication apparatus is a network device.
  • the communication interface may be a transceiver, or an input/output interface.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • the communication apparatus is a chip or a chip system configured in a network device.
  • the communication interface may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit, and the like.
  • the processor may also be embodied as a processing circuit or a logic circuit.
  • a communication device may be a terminal device, or a component in a terminal device.
  • the communication apparatus may include various modules or units for performing the method in the second aspect and any possible implementation manner of the second aspect.
  • a communication apparatus including a processor.
  • the processor is coupled to the memory and can be used to execute instructions in the memory to implement the method in any of the possible implementations of the second aspect above.
  • the communication device further includes a memory.
  • the communication device further includes a communication interface, the processor is coupled to the communication interface, the communication interface is used for inputting and/or outputting information, and the information includes at least one of instructions and data.
  • the communication apparatus is a terminal device.
  • the communication interface may be a transceiver, or an input/output interface.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • the communication apparatus is a chip or a chip system configured in the terminal device.
  • the communication interface may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit, and the like.
  • the processor may also be embodied as a processing circuit or a logic circuit.
  • a communication device may be a network device, or a component in a network device.
  • the communication apparatus may include various modules or units for performing the method in the third aspect and any possible implementation manner of the third aspect.
  • a communication apparatus including a processor.
  • the processor is coupled to the memory and can be used to execute instructions in the memory to implement the method in any of the possible implementations of the third aspect.
  • the communication device further includes a memory.
  • the communication device further includes a communication interface, the processor is coupled to the communication interface, the communication interface is used for inputting and/or outputting information, and the information includes at least one of instructions and data.
  • the communication device is a CU-CP entity.
  • the communication interface may be a transceiver, or an input/output interface.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • the communication device is a chip or a chip system configured in the CU-CP entity.
  • the communication interface may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit.
  • the processor may also be embodied as a processing circuit or a logic circuit.
  • a processor comprising: an input circuit, an output circuit and a processing circuit.
  • the processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in any of the possible implementation manners of the first aspect to the third aspect.
  • the above-mentioned processor may be a chip
  • the input circuit may be an input pin
  • the output circuit may be an output pin
  • the processing circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits.
  • the input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver
  • the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by a transmitter
  • the circuit can be the same circuit that acts as an input circuit and an output circuit at different times.
  • the embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.
  • a processing apparatus including a communication interface and a processor.
  • the communication interface is coupled with the processor.
  • the communication interface is used to input and/or output information.
  • the information includes at least one of instructions and data.
  • the processor is configured to execute a computer program, so that the processing device executes the method in any one of the possible implementations of the first aspect to the third aspect.
  • processors there are one or more processors and one or more memories.
  • a twelfth aspect provides a processing apparatus including a processor and a memory.
  • the processor is configured to read instructions stored in the memory, and can receive signals through a receiver and transmit signals through a transmitter, so that the processing device executes the method in any one of the possible implementations of the first aspect to the third aspect .
  • processors there are one or more processors and one or more memories.
  • the memory may be integrated with the processor, or the memory may be provided separately from the processor.
  • the memory can be a non-transitory memory, such as a read only memory (ROM), which can be integrated with the processor on the same chip, or can be separately set in different On the chip, the embodiment of the present application does not limit the type of the memory and the setting manner of the memory and the processor.
  • ROM read only memory
  • sending indication information may be a process of outputting indication information from the processor
  • receiving indication information may be a process of inputting received indication information to the processor.
  • the information output by the processing can be output to the transmitter, and the input information received by the processor can be from the receiver.
  • the transmitter and the receiver may be collectively referred to as a transceiver.
  • the device in the eleventh aspect and the twelfth aspect above may be a chip, and the processor may be implemented by hardware or software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; When implemented by software, the processor may be a general-purpose processor, which is implemented by reading software codes stored in a memory, which may be integrated in the processor or located outside the processor and exist independently.
  • a thirteenth aspect provides a computer program product, the computer program product comprising: a computer program (also referred to as code, or instructions), which, when the computer program is executed, causes the computer to execute the above-mentioned first aspect to The method in any possible implementation manner of the third aspect.
  • a computer program also referred to as code, or instructions
  • a computer-readable medium stores a computer program (also referred to as code, or instruction) when it runs on a computer, causing the computer to execute the above-mentioned first aspect to The method in any possible implementation manner of the third aspect.
  • a computer program also referred to as code, or instruction
  • a communication system including the aforementioned terminal device and network device.
  • FIG. 1 is a schematic diagram of a communication system applicable to the communication method provided by the embodiment of the present application.
  • FIG. 2 to FIG. 5 are schematic flowcharts of a communication method provided by an embodiment of the present application.
  • FIG. 6 and FIG. 7 are schematic block diagrams of a communication apparatus provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • LTE Long Term Evolution
  • FDD frequency division duplex
  • UMTS time division duplex
  • WiMAX worldwide interoperability for microwave access
  • 5G fifth generation
  • 5G fifth generation
  • NR new wireless access Technology
  • V2X can include vehicle-to-network (V2N), vehicle-to-vehicle (V2V), Vehicle to Infrastructure (V2I), Vehicle to Pedestrian (V2P), etc.
  • Long Term Evolution-Vehicle (LTE-V) Internet of Vehicles, Machine Type Communication (Machine Type Communication) communication, MTC), Internet of things (internet of things, IoT), Long Term Evolution-Machine (LTE-M), machine to machine (M2M), etc.
  • MTC Machine Type Communication
  • IoT Internet of things
  • IoT Internet of things
  • LTE-M Long Term Evolution-Machine
  • M2M machine to machine
  • the network device may be any device with a wireless transceiver function.
  • the device includes but is not limited to: evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), Node B (Node B, NB), base station controller (base station controller, BSC) , base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (baseband unit, BBU), wireless fidelity (qireless fidelity, WIFI) system Access point (AP), wireless relay node, wireless backhaul node, transmission point (TP) or transmission and reception point (TRP), etc.
  • eNB evolved Node B
  • RNC radio network controller
  • Node B Node B
  • BSC base station controller
  • base transceiver station base transceiver station
  • BTS home base station
  • home base station for example, home evolved NodeB, or home Node B, HNB
  • It can also be 5G, such as NR , a gNB in the system, or, a transmission point (TRP or TP), one or a group of (including multiple antenna panels) antenna panels of a base station in a 5G system, or, it can also be a network node that constitutes a gNB or a transmission point, Such as baseband unit (BBU), or distributed unit (distributed unit, DU) and so on.
  • BBU baseband unit
  • DU distributed unit
  • a gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include an active antenna unit (AAU).
  • the CU implements some functions of the gNB, and the DU implements some functions of the gNB.
  • the CU is responsible for processing non-real-time protocols and services, implementing radio resource control (RRC), and service data adaptation protocol (SDAP).
  • RRC radio resource control
  • SDAP service data adaptation protocol
  • protocol layer the function of the packet data convergence layer protocol (packet data convergence protocol, PDCP) layer.
  • the DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, the media access control (MAC) layer and the physical (PHY) layer.
  • RLC radio link control
  • MAC media access control
  • PHY physical
  • AAU implements some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, therefore, in this architecture, the higher-layer signaling, such as the RRC layer signaling, can also be considered to be sent by the DU. , or, sent by DU+AAU.
  • the network device may be a device including one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into network devices in an access network (radio access network, RAN), and the CU can also be divided into network devices in a core network (core network, CN), which is not limited in this application.
  • the functionality of the CU entity may be implemented by one or more entities.
  • the function of the CU entity can be further segmented, for example, the function of the control plane (CP) and the function of the user plane (UP) can be separated, that is, the CU entity includes the control plane of the CU (CU- CP) entity and CU user plane (CU-UP) entity, the CU-CP entity and CU-UP entity can be coupled with the DU entity to jointly complete the function of the network device.
  • the CU-CP entity is responsible for the control plane function, mainly including the RRC protocol layer and the PDCP control plane (PDCP control plane, PDCP-C) protocol layer.
  • the PDCP-C protocol layer is mainly responsible for encryption and decryption of control plane data, integrity protection, and data transmission.
  • the CU-UP entity is responsible for user plane functions, mainly including the SDAP protocol layer and the PDCP user plane (PDCP user plane, PDCP-U) protocol layer.
  • the SDAP protocol layer is mainly responsible for mapping the data flow (flow) of the core network to the bearer.
  • the PDCP-U protocol layer is mainly responsible for encryption and decryption of the data plane, integrity protection, header compression, serial number maintenance, and data transmission.
  • the CU-CP entity and the CU-UP entity are connected through an interface (for example, an E1 interface).
  • the CU-CP entity is connected to the DU entity through the F1-C (control plane), and the CU-UP entity is connected to the DU entity through the F1-U (user plane).
  • the CU-CP entity represents the network equipment and the control plane of the core network (such as the mobility management entity (MME) of the 4th generation (4G) core network, or the 5G core network (5G core, 5GC)
  • MME mobility management entity
  • 5G core 5G core network
  • the CU-UP entity represents the network equipment and the user plane of the core network (such as the serving gateway (SGW) of the 4G core network, or the 5G
  • SGW serving gateway
  • UPF user plane function
  • the network equipment provides services for the cell, and the terminal equipment communicates with the cell through transmission resources (for example, frequency domain resources, or spectrum resources) allocated by the network equipment, and the cell may belong to a macro base station (for example, a macro eNB or a macro gNB, etc.) , can also belong to the base station corresponding to the small cell, where the small cell can include: urban cell (metro cell), micro cell (micro cell), pico cell (pico cell), femto cell (femto cell), etc. , these small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • a macro base station for example, a macro eNB or a macro gNB, etc.
  • the small cell can include: urban cell (metro cell), micro cell (micro cell), pico cell (pico cell), femto cell (femto cell), etc.
  • these small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission
  • terminal equipment includes user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless Communication equipment, user agent or user equipment.
  • the terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation security ( wireless terminals in transportation safety), wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local Wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, 5G
  • wearable devices can also be called wearable smart devices, which is a general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories.
  • Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart jewelry, etc. for physical sign monitoring.
  • the terminal device may also be a terminal device in an internet of things (Internet of things, IoT) system.
  • IoT Internet of things
  • IoT is an important part of the development of information technology in the future. Its main technical feature is to connect items to the network through communication technology, so as to realize the intelligent network of human-machine interconnection and interconnection of things.
  • This application does not limit the specific form of the terminal device.
  • FIG. 1 shows a schematic diagram of a communication system applicable to the communication method and communication apparatus of the embodiments of the present application.
  • the communication system 100 may include at least two network devices, such as the network device 110 and the network device 120 shown in FIG. 1 ; the communication system 100 may also include at least one terminal device, such as the terminal device shown in FIG. 1 . 130.
  • the terminal device 130 may be mobile or fixed.
  • Both the network device 110 and the network device 120 are devices that can communicate with the terminal device 130 through a wireless link, such as a base station or a base station controller. Each network device can provide communication coverage for a specific geographic area and can communicate with terminal devices located within the coverage area (cell).
  • FIG. 1 exemplarily shows two network devices and one terminal device.
  • the communication system 100 may include at least one network device and the coverage of each network device may include other numbers of terminal devices.
  • This application implements The example does not limit this.
  • Each of the above communication devices may be configured with multiple antennas.
  • the plurality of antennas may include at least one transmit antenna for transmitting signals and at least one receive antenna for receiving signals.
  • each communication device additionally includes a transmitter chain and a receiver chain, which can be understood by those of ordinary skill in the art, all of which may include multiple components (eg, processors, modulators, multiplexers) related to signal transmission and reception. , demodulator, demultiplexer or antenna, etc.). Therefore, the network device and the terminal device can communicate through the multi-antenna technology.
  • the wireless communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like, which are not limited in this embodiment of the present application.
  • network entities such as a network controller, a mobility management entity, and the like, which are not limited in this embodiment of the present application.
  • DAPS handover In order to ensure zero interruption in the process of terminal device handover, DAPS handover is introduced in the communication industry standard.
  • the terminal device disconnects from the source cell after receiving the handover command from the source network device, and accesses the target cell.
  • the terminal device accesses the target cell after receiving the handover command sent by the source network device, and at the same time, maintains the link communication with the source cell until the target network device notifies Only after the terminal device completely releases the configuration of the source cell, the terminal device stops communicating with the source cell and releases the communication link with the source cell.
  • the handover process of DAPS is similar to the traditional handover process.
  • the source network device decides to perform the handover, and then the source network device sends a handover request to the target network device. Further, the target network device replies with a handover confirmation message to the source network device, indicating that the accepting terminal is handed over to the target cell. Further, the source network device sends a handover command to the terminal device, instructing the terminal device to switch to the target cell. Then, the terminal device maintains the connection of the source cell and the target cell at the same time.
  • the target cell When the terminal device successfully accesses the target cell, the target cell sends a message to the core network, and the core network switches the downlink data flow to the target network device, and at the same time sends an end marker data packet to the source network device. Subsequently, the source network device forwards the data to the target network device. After the terminal device successfully accesses the target cell, the target network device may notify the terminal device to release the connection to the source cell, thereby completing the DAPS handover process.
  • the terminal device stops sending new uplink data to the source network device.
  • the terminal device After the terminal device successfully releases the connection with the source cell, the terminal device stops all communications with the source network device.
  • the source network device receives the handover success indication message sent by the target network device, and thus the source network device stops sending new downlink data to the terminal device.
  • the mobility management of the terminal equipment in the connected state is controlled by the network equipment, that is, the network equipment instructs the terminal equipment to which cell to switch to and how to perform the handover by sending a handover message.
  • the source network device sends a handover message to the terminal device to control the terminal device to switch from the source cell to the target cell.
  • the terminal device accesses the target cell according to the content contained in the handover message. Therefore, the successful sending of the handover message is a necessary condition to ensure the successful handover under the traditional handover mechanism.
  • the network device generally judges whether to instruct the terminal device to perform the handover based on the signal quality reported by the terminal device. For example, when the terminal device detects that the signal quality of the neighboring cell is better than that of the current serving cell by a certain threshold , the terminal device reports the measurement result.
  • the rapid attenuation of the signal quality, or the rapid movement of the terminal equipment and the occlusion of the object will cause the failure to send the measurement report, which will lead to the failure of the handover and reduce the success rate of the handover.
  • the CHO mechanism is introduced into the communication industry standard to improve the handover success rate.
  • the source cell when the quality of the source link is good, the source cell sends the CHO configuration information to the terminal device.
  • the CHO configuration information may include the CHO trigger condition and the information of one or more candidate cells, where the information of the candidate cells may include the candidate cells.
  • the cell global identifier (cell global identifier, CGI) of the cell, or may include the physical cell identifier (physical cell identifier, PCI) of the candidate cell and frequency information corresponding to the candidate cell.
  • the terminal device After receiving the CHO configuration information, the terminal device determines whether the candidate cell satisfies the CHO triggering condition according to the CHO configuration information, and takes a candidate cell that satisfies the CHO triggering condition as the target cell.
  • the terminal device performs a random access process with the determined target cell.
  • the terminal device sends an RRC message (such as an RRC reconfiguration complete message) to the target cell to notify the target cell that the conditional handover is completed.
  • RRC message such as an RRC reconfiguration complete message
  • One of the purposes of introducing the movement history information of the terminal device in the prior art is to optimize the mobility of the terminal device. For example, in the macro-micro networking (that is, some cells have relatively large coverage (such as using frequency f1), and other cells have relatively small coverage (such as using frequency f2)), try to keep the terminal equipment only in the macro station (coverage). In order to reduce the number of RRC messages exchanged between the terminal device and the network device. Because the coverage of the micro cell is relatively small, if the terminal device switches in the micro cell, the terminal device may switch between multiple cells in a very short time, resulting in a relatively large number of RRC messages exchanged between the terminal device and the network device. .
  • the network equipment can estimate the speed or historical cell of the terminal equipment according to the movement history information of the terminal equipment, so as to provide information for the terminal equipment. Configure different measurement parameters. For example, the network device can learn that the terminal device may perform ping-pong handover between different cells according to the movement history information of the terminal device, so that the network device can change the parameters corresponding to the handover.
  • the movement history information of the terminal device may be recorded by the terminal device or by the network device.
  • the terminal device If the terminal device supports storing the movement history information, the terminal device records the movement history information in the following ways:
  • the terminal device includes or adds an entity that records the movement history in a variable that saves the movement history, the entity includes the information of the visited cell, visitedCellInfo, and the information of the visited cell includes the visitedCellId (the number of entities that the terminal device can save is limited, if If the number exceeds the maximum number, the first saved entity will be deleted first), and the relevant content will be recorded as follows:
  • the CGI of the previous primary cell or serving cell if the CGI of the previous primary cell or serving cell is available, carry the CGI in the entity; if the VGI of the previous primary cell or serving cell is not available, carry the PCI of the primary cell or serving cell in the entity and frequency.
  • the time that the terminal device stayed in the previous primary cell or serving cell is stored in the entity.
  • the terminal device When the terminal device enters the current RAT from other radio access technology (RAT), or the terminal device enters the current RAT from the non-service area, the terminal device includes in a variable that saves the movement history. Or add an entity that records the movement history, which includes the information of the visited cell, visitedCellInfo, (the number of entities that the terminal device can save is limited, if the number exceeds the maximum number, the first saved entity will be deleted first), and in Time spent outside the current RAT is recorded in this entity.
  • RAT radio access technology
  • the terminal device When the terminal device re-accesses the network from an inactive state (inactive) or an idle state (idle), the terminal device will instruct the network device when accessing the network, and the terminal device device saves the movement history information.
  • the terminal device may carry an indication message in the RRC connection setup complete (RRCConnection setupcomplete) message or the RRC connection setup recovery complete (RRCConnectionResumeComplete) message to indicate that the terminal device has saved the movement history information.
  • the network device may request the terminal device to report the movement history information.
  • the network device may carry a request for movement history information indication in the terminal device information request (UEInformationRequest) message.
  • the terminal device after receiving the request from the network device, the terminal device may report the movement history information to the network device.
  • the terminal device may carry movement history information in a terminal device information response (UEInformationResponse) message.
  • UEInformationResponse terminal device information response
  • the source cell/network device will send the movement history information reported by the terminal device to the target cell/network device.
  • the source cell/network device may carry the movement history information of the terminal device in the handover request message.
  • the network device If the network device supports storing the movement history information of the terminal device, the network device records the movement history information of the terminal device in the following manner:
  • the network device can also record the movement history information of the terminal device. For example, if the serving cell corresponding to the terminal device changes, the network device can record the cell corresponding to the serving cell before the change, for example, can record the CGI of the cell and the type of the cell (for example, the size of the cell, the value can be very small, small, medium , large) and the time the terminal device stays in the cell. If a network device switch occurs in the terminal device, the source network device will send the previously recorded movement history information of the terminal device to the target network device. For example, the source network device carries the movement history information of the terminal device in the handover request message and sends it to the target network device. Further, the target network device may perform some mobility optimizations according to the movement history information, and start recording the movement history information of the terminal device.
  • the target network device may perform some mobility optimizations according to the movement history information, and start recording the movement history information of the terminal device.
  • the network device can also perform other purposes according to the movement history information of the terminal device. For example, the network device can reduce the number of times the terminal device measures cells or frequency points according to the movement history information of the terminal device, thereby saving the power of the terminal device.
  • the source network device may carry the movement history information of the terminal device in the handover request message and send it to the target network device.
  • the target network device starts to collect and store the movement history information of the terminal device, that is, the handover request message sent by the source network device to the target network device can trigger the target network
  • the device starts to collect and store the movement history information of the terminal device (for example, starts to record the time that the terminal device stays in the cell in the target network device).
  • the time when the source network device sends the handover request message to the target network device and the time when the terminal device selects the target cell (that is, a candidate cell) for access may be quite different. It is unreasonable to start recording the movement history information of the terminal device at the moment of the message.
  • the source network device after the source network device sends the handover message carrying the movement history information of the terminal device to the target network device, it stops recording the movement history information of the terminal device.
  • the terminal device is connected to both the source network device (or source cell) and the target network device (or target cell) for a period of time, so the source network device stops recording the terminal after sending the handover request message
  • the movement history information of the device is not reasonable because the terminal device is actually still connected to the source cell.
  • the present application provides a communication method, in which the terminal device and the network device can reasonably record the movement history information of the terminal device during the switching process of the terminal device.
  • the terminal equipment shown in the following embodiments may be replaced with components (such as chips or circuits) configured in the terminal equipment.
  • the network devices shown in the following embodiments may also be replaced with components (such as chips or circuits) configured in the network devices.
  • the embodiments shown below do not specifically limit the specific structure of the execution body of the method provided by the embodiment of the present application, as long as the program that records the code of the method provided by the embodiment of the present application can be executed to provide the method according to the embodiment of the present application.
  • the execution subject of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or network device that can call and execute a program.
  • FIG. 2 is a schematic flowchart of a communication method 200 provided by an embodiment of the present application, shown from the perspective of device interaction. Each step in the method 200 is described in detail below.
  • the network device #2 (an example of the second network device) sends a CHO request message to the network device #1 (an example of the first network device).
  • the network device #1 receives the CHO request message from the network device #2.
  • Network device #1 is the network device to which cell #1 (an example of the first cell) belongs, and cell #1 is the cell to be accessed by the terminal device.
  • Cell #1 may also be called a candidate cell or a target cell, and network device #1 is also Can be called the target network device.
  • Network device #2 is a network device to which cell #2 belongs, and cell #2 is a cell that provides services for terminal devices before CHO.
  • Cell #2 may also be referred to as a source cell, and network device #2 may also be referred to as a source network device.
  • the network device #1 and the network device #2 may be the same network device, or may be different network devices, which are not limited in this embodiment of the present application.
  • cell #2 may transmit a CHO request message (an example of a handover request message) to cell #1.
  • the CHO request message may carry movement history information #1 (an example of the second movement history information).
  • the movement history information #1 is the movement history information of the terminal device recorded by the network device #2 before sending the CHO request message, and the movement history information #1 includes the history information of the terminal device in the cell #2.
  • the movement history information #1 may include one or more of the following: CGI of cell #2, PCI of cell #2, center frequency of cell #2, period #1 (an example of the third period), period #1 Indicates the time that the terminal equipment stays in cell #2. Since the movement history information #1 is the information recorded by the network device #2 before sending the CHO request message, the period #1 included in the movement history information #1 is the time period when the terminal device stayed in the cell #2 before the network device #2 sent the CHO request message. time.
  • the CHO request message may not carry the movement history information #1.
  • the CHO request message may be a handover request message.
  • the handover request message may further include indication information #1, where the indication information #1 is used to indicate that the handover request message is a handover request message under the CHO handover mechanism.
  • the network device #1 sends a CHO request confirmation message to the network device #2.
  • the network device #2 receives the CHO request confirmation message from the network device #1.
  • the CHO request confirmation message includes the RRC configuration information configured by the network device #1 for the terminal device. Specifically, the CHO request confirmation message includes the RRC configuration information configured for the terminal device by cell #1.
  • RRC configuration information configured for the terminal device by cell #1.
  • the network device #2 sends the CHO configuration information to the terminal device.
  • the terminal device receives the CHO configuration information from the network device #2.
  • the CHO configuration information includes the RRC configuration information configured by the network device #1 for the terminal device. Specifically, the CHO configuration information includes RRC configuration information configured by cell #1 for the terminal device. The CHO configuration information also includes a triggering condition for the terminal equipment to access the cell #1.
  • the terminal device determines whether the trigger condition of cell #1 is satisfied.
  • the terminal equipment can be switched to cell #1, that is, switched from cell #2 to cell #1. For example, initiate a random access procedure to cell #1 or send an RRC reconfiguration complete message.
  • the trigger condition for the terminal equipment to access cell #1 is that the signal quality of cell #1 is greater than a preset threshold. Then, when the signal quality of cell #1 is greater than the preset threshold, the terminal device initiates random access to cell #1.
  • the terminal equipment performs the RRC re-establishment process.
  • the terminal equipment performs cell selection.
  • the cell is a candidate cell in the CHO configuration information sent by the network device #2 to the terminal device, and the network device #2 sends an indication message to the terminal device.
  • conditional reconfiguration can be performed (that is, the RRC configuration information corresponding to the candidate cell is executed), and then the terminal equipment is switched to the candidate cell (such as cell #1), that is, switched from cell #2 to the candidate cell (the terminal equipment to the candidate cell).
  • the candidate cell sends an RRC reconfiguration complete message.
  • the terminal device performs a random access process with the candidate cell).
  • the terminal equipment is changed to cell #1.
  • the network device #1 determines that the terminal device is to be changed to the cell #1.
  • the terminal device is replaced to cell #1, which means that the terminal device is successfully replaced to cell #1, that is, the terminal device successfully establishes a connection with cell #1.
  • the terminal equipment when the terminal equipment is changed to cell #1, it may be that the terminal equipment successfully switches from cell #2 to cell #1, or the terminal equipment successfully initiates RRC re-establishment in cell #1 (here refers to the fact that the terminal equipment detects the wireless The cell selects the candidate cell in the CHO during the RRC re-establishment process after link failure). This application does not limit this.
  • the cell #1 may also determine that the terminal equipment is to be changed to the cell #1.
  • the network device #1 starts to record the movement history information #2 (an example of the first movement history information) at or after the time when the terminal device is changed to the cell #1. history information.
  • the movement history information #2 an example of the first movement history information
  • the cell #1 may start recording the movement history information #2 at or after the time when the terminal is determined to be changed to the cell #1.
  • Movement history information #2 may include one or more of the following: CGI of cell #1, PCI of cell #1, center frequency of cell #1, period #2 (an example of the second period), period #2 is the terminal The time the device was in cell #1.
  • the fact that the network device #1 starts to record the movement history information #2 can be understood as that the network device #1 starts to record the time that the terminal device stays in the cell #1. That is, the network device #1 considers that the terminal device starts to stay in the cell #1 at or after the time when the terminal device is determined to be changed to the cell #1.
  • network device #1 may also start recording the CGI of cell #1 or the PCI and center frequency of cell #1. It should be noted that the moment when the network device #1 generates the movement history information #2 is not limited by itself. The network device #1 may generate the movement history information #2 after determining that the terminal device is handed over from the cell #1 to other cells.
  • the fact that the network device #1 starts recording the movement history information #2 can also be understood as the network device #1 starting to collect the movement history information #2. Recording movement history information in this application can be understood as collecting movement history information.
  • This embodiment of the present application does not limit how the network device #1 determines whether the terminal device is changed to the cell #1. It should be understood that, in different manners, the time at which the network device #1 determines that the terminal device is changed to the cell #1 may be different, and further, the time at which the network device #1 starts recording the movement history information #2 may also be different.
  • Network device #1 can determine whether the terminal device is changed to cell #1 according to the following methods:
  • Manner 1 The network device #1 determines that the terminal device is replaced to the cell #1 under the condition that the random access of the terminal device in the cell #1 is successful.
  • the network device #1 determines that the random access of the terminal device in the cell #1 succeeds when the random access response signaling is sent to the terminal device.
  • the network device #1 determines that the terminal device succeeds in random access in cell #1 in the case of sending a conflict resolution signaling to the terminal device.
  • the network device #1 may start recording the movement history information #2 at or after the time when the terminal device is determined to have a successful random access to the cell #1.
  • Manner 2 In the case that the network device #1 sends a handover success (HO success) message to the terminal device, it is determined that the terminal device is changed to the cell #1.
  • HO success handover success
  • the network device #1 may start recording the movement history information #2 at or after the time when the handover success message is sent.
  • the network device #1 may determine that the terminal device is changed to the cell #1 in the case of receiving the sequence number status transfer message.
  • the network device #1 may start recording the movement history information #2 at or after receiving the serial number state transition message.
  • the method 200 may further include S230: the network device #2 sends the movement history information #3 to the network device #1.
  • the movement history information #3 is the movement history information of the terminal device recorded by the network device #2, and the movement history information #3 includes the history information of the terminal device in the cell #2.
  • movement history information #3 may include one or more of the following: CGI of cell #2, PCI of cell #2, center frequency of cell #2, time period #3, where time period #3 is when the terminal device is in cell #2 time to wait.
  • the network device #1 can start recording the movement history information of the terminal device when it is determined that the terminal device is replaced to the cell #1.
  • the network device #2 can determine that the terminal device is replaced to the cell #1.
  • stop recording the movement history information of the terminal device and send the recorded movement history information of the terminal device (ie, movement history information #3) to the network device #1. Therefore, the period #3 included in the movement history information #3 is the time that the terminal device stays in the cell #2 before changing to the cell #1.
  • Network device #2 can determine whether the terminal device is changed to cell #1 according to the following methods:
  • the network device #2 may determine that the terminal device is to be changed to the cell #1 at the moment of receiving the handover success message from the network device #1. That is, the network device #2 may stop recording the movement history information of the terminal device at the moment of receiving the handover success message, and send the movement history information #3 to the network device #1.
  • the network device #2 may determine that the terminal device is changed to the cell #1 at the moment of sending the serial number state transition message. That is, the network device #2 area can stop recording the movement history information of the terminal device at the moment of sending the serial number state transition message, and send the movement history information #3 to the network device #1.
  • the network device #2 may carry the movement history information #3 in the serial number state transition message and send it to the network device #1; or, the network device #2 may carry the movement history information #3 in other messages and send it
  • a new message can be defined.
  • the method 200 may further include: the network device #1 is determining the terminal When the device is changed to cell #1, the movement history information #1 is modified. Specifically, the network device #1 modifies the duration of the period #1 included in the movement history information #1, that is, the network device #1 can compensate for the time period from receiving the CHO request message to determining that the terminal device is changed to cell #1 into period #1.
  • the terminal device does not immediately perform the handover, that is, the terminal device may continue to stay in the cell #2, while the period #1 is The time that the terminal device stays in cell #2 before the network device #2 sends the CHO request message, that is, the period #1 may not be the time that the terminal device actually stays in cell #2.
  • the time that the terminal equipment actually stays in the cell #2 is equal to the period #1 plus the period of time during which the network equipment #2 sends a CHO request message to the network equipment #2 to determine that the terminal equipment is changed to the cell #1.
  • the period #1 included in the movement history information #1 is t1
  • the period from when the network device #2 sends the CHO request message (or the network device #1 receives the CHO request message) until it is determined that the terminal device is changed to cell #1 is t2
  • the network device #1 can modify the period #1 to t1+t2.
  • the method 200 may further include S240: network device #1 sends movement history information to network device #3 (an example of a third network device) #2.
  • the network device #3 is the network device to which the cell #3 belongs. It can be understood that in the process of changing the terminal equipment from cell #1 to cell #3, cell #1 may be called the source cell, network equipment #1 may be called the source network equipment, and correspondingly, cell #3 may be called the target cell or candidate cell, network device #3 may be referred to as the target network device.
  • the target network device ie, network device #1
  • the target cell cell #1
  • Start recording the movement history information of the terminal device that is, start recording the history information of the terminal device in the target cell, so that more accurate movement history information of the terminal device can be recorded, so that the target network device can know the more accurate movement of the terminal device, so that To make some optimizations more accurate.
  • the target network device can modify the time that the terminal device stays in the source cell (cell #2) received in the handover request message, that is, the time from receiving the handover request message to the time when the terminal device successfully switches to the target cell is compensated to the terminal device.
  • the target network device can obtain more accurate historical information of the terminal device in the source cell, so as to perform some optimizations more accurately.
  • FIG. 3 is a schematic flowchart of a communication method 200 provided by an embodiment of the present application, shown from the perspective of device interaction. Each step in the method 300 is described in detail below.
  • the network device #2 (an example of the second network device) sends a handover request message to the network device #1 (an example of the first network device).
  • the network device #1 receives the handover request message from the network device #2.
  • Network device #1 is the network device to which cell #1 (an example of the first cell) belongs, and cell #1 is the cell to be accessed by the terminal device.
  • Cell #1 may also be called a candidate cell or a target cell, and network device #1 is also Can be called the target network device.
  • Network device #2 is a network device to which cell #2 belongs, and cell #2 is a cell that provides services for terminal devices before DAPS handover.
  • Cell #2 may also be referred to as a source cell, and network device #2 may also be referred to as a source network device .
  • the network device #1 and the network device #2 may be the same network device, or may be different network devices, which are not limited in this embodiment of the present application.
  • cell #2 may also send a handover request message to cell #1.
  • the handover request message may carry movement history information #1 (an example of the second movement history information).
  • the movement history information #1 is the movement history information of the terminal device recorded by the network device #2 before sending the handover request message, and the movement history information #1 includes the history information of the terminal device in the cell #2.
  • the movement history information #1 may include one or more of the following: CGI of cell #2, PCI of cell #2, center frequency of cell #2, period #1 (an example of the third period), period #1 Indicates the time that the terminal equipment stays in cell #2. Since the movement history information #1 is the information recorded by the network device #2 before sending the handover request message, the period #1 included in the movement history information #1 is the time period when the terminal device stayed in the cell #2 before the network device #2 sent the handover request message. time.
  • the movement history information #1 may further include indication information #2, where the indication information #2 is used to instruct the terminal device to switch from cell #2 to cell #1 in a DAPS handover manner.
  • the handover request message may not carry the movement history information #1.
  • the network device #1 sends a handover request confirmation message to the network device #2.
  • the network device #2 receives the handover request confirmation message from the network device #1.
  • the handover request confirmation message includes the RRC configuration information configured by the network device #1 for the terminal device.
  • the handover request confirmation message includes RRC configuration information configured for the terminal device by cell #1.
  • the RRC configuration information may also carry indication information to indicate which data radio bearers (Data Radio Bearers, DRBs) perform DAPS operations, that is, only some DRBs may perform DAPS handover, and other DRBs are still processed according to traditional handovers. .
  • DRBs Data Radio Bearers
  • the network device #2 sends a handover command to the terminal device.
  • the terminal device receives the handover command from the network device #2.
  • the handover command sent by the network device #2 to the terminal device may be in the form of an RRC reconfiguration message, and the RRC reconfiguration message includes the RRC configuration information configured by the network device #1 for the terminal device.
  • the RRC reconfiguration message includes RRC configuration information configured by cell #1 for the terminal device.
  • the terminal equipment is changed to cell #1.
  • the network device #1 determines that the terminal device is changed to the cell #1.
  • the terminal device is replaced to cell #1, which means that the terminal device is successfully replaced to cell #1, that is, the terminal device successfully establishes a connection with cell #1.
  • the cell #1 may also determine that the terminal equipment is to be changed to the cell #1.
  • the network device #1 starts to record the movement history information #2 (an example of the first movement history information) at or after the time when the terminal device is changed to the cell #1.
  • the movement history information #2 is the information of the terminal device in the cell #1 history information.
  • the cell #1 may start recording the movement history information #2 at or after the time when the terminal is determined to be changed to the cell #1.
  • Movement history information #2 may include one or more of the following: CGI of cell #1, PCI of cell #1, center frequency of cell #1, period #2 (an example of the second period), period #2 is the terminal The time the device was in cell #1.
  • the movement history information #2 may further include indication information #3 (an example of the third indication information), where the indication information #3 is used to instruct the terminal device to switch from cell #1 to cell #3 ( An example of the third district).
  • indication information #3 an example of the third indication information
  • the indication information #3 is also used to indicate a period #5, and the period #5 indicates the duration that the terminal device stays in the cell #1 and the cell #3 at the same time during the DAPS handover process.
  • the fact that the network device #1 starts to record the movement history information #2 can be understood as that the network device #1 starts to record the time that the terminal device stays in the cell #1. That is, the network device #1 considers that the terminal device starts to stay in the cell #1 at or after the time when the terminal device is determined to be changed to the cell #1.
  • network device #1 may also start recording the CGI of cell #1 or the PCI and center frequency of cell #1. It should be noted that the present application does not limit the moment when the network device #1 generates the movement history information #2.
  • the network device #1 may generate the movement history information #2 after determining that the terminal device is handed over from the cell #1 to other cells.
  • the fact that the network device #1 starts recording the movement history information #2 can also be understood as the network device #1 starting to collect the movement history information #2. Recording movement history information in this application can be understood as collecting movement history information.
  • This embodiment of the present application does not limit how the network device #1 determines whether the terminal device is changed to the cell #1. It should be understood that, in different manners, the time at which the network device #1 determines that the terminal device is changed to the cell #1 may be different, and further, the time at which the network device #1 starts recording the movement history information #2 may also be different.
  • Network device #1 can determine whether the terminal device is changed to cell #1 according to the following methods:
  • Manner 1 The network device #1 determines that the terminal device is replaced to the cell #1 under the condition that the random access of the terminal device in the cell #1 is successful.
  • the network device #1 determines that the terminal device succeeds in random access in the cell #1 under the condition that the random access response signaling is sent to the terminal device.
  • the network device #1 determines that the terminal device succeeds in random access in the cell #1 in the case of sending the conflict resolution signaling to the terminal device.
  • the network device #1 may start recording the movement history information #2 at or after the time when the terminal device is determined to have a successful random access to the cell #1.
  • Mode 2 When the network device #1 sends the indication information #4 (an example of the first indication information) to the terminal device, it determines that the terminal device is changed to the cell #1, and the indication information #4 is used to instruct the terminal device to disconnect from the cell #1. Connection of cell #2.
  • the indication information #4 can also be used to instruct the terminal equipment to stop the DAPS operation in the cell #2, and release the configuration information of the terminal equipment in the cell #2.
  • the network device #1 may start recording the movement history information #2 at or after the time when the indication information #4 is sent.
  • the network device #1 may determine that the terminal device is changed to cell #1 when the indication information #5 (an example of the second indication information) is sent, and the indication information #5 is used to indicate the cell #2 or the network device # 2 Release the context of the terminal device.
  • indication information #5 an example of the second indication information
  • the network device #1 may start recording the movement history information #2 at or after the time when the indication information #5 is sent.
  • the method 300 may further include S330: the network device #2 sends the movement history information #3 to the network device 1.
  • the movement history information #3 is the movement history information of the terminal device recorded by the network device #2, and the movement history information #3 includes the history information of the terminal device in the cell #2.
  • movement history information #3 may include one or more of the following: CGI of cell #2, PCI of cell #2, center frequency of cell #2, time period #3, where time period #3 is when the terminal device is in cell #2 time to wait.
  • the network device #1 can start recording the movement history information of the terminal device when it is determined that the terminal device is replaced to the cell #1.
  • the network device #2 can determine that the terminal device is replaced to the cell #1.
  • stop recording the movement history information of the terminal device and send the recorded movement history information of the terminal device (ie, movement history information #3) to the network device #1. Therefore, the period #3 included in the movement history information #3 is the time that the terminal device stays in the cell #2 before changing to the cell #1.
  • the network device #2 may determine that the terminal device is changed to the cell #1 at the moment of receiving the indication information #5. That is, the network device #2 may stop recording the movement history information of the terminal device at the moment of receiving the indication information #5, and send the movement history information #3 to the network device #1.
  • the movement history information #3 may further include indication information #2, where the indication information #2 is used to instruct the terminal device to switch from cell #2 to cell #1 in a DAPS handover manner.
  • the indication information #2 is also used to indicate a period #4, and the period #4 indicates the duration that the terminal device stays in the cell #2 and the cell #1 at the same time during the DAPS handover process.
  • the network device #2 may carry the movement history information #3 in the serial number state transition message and send it to the network device #1; or, the network device #2 may carry the movement history information #3 in other messages and send it
  • a new message can be defined.
  • the method 300 may further include: the network device #1 is determining the terminal When the device is changed to cell #1, the movement history information #1 is modified. Specifically, the network device #1 modifies the duration of the period #1 included in the movement history information #1, that is, the network device #1 can compensate for the period from receiving the handover request message to the time when the terminal device is changed to cell #1 to Period #1.
  • the terminal device #2 after the network device #2 sends the handover request message to the network device #1, the terminal device remains connected to the cell #2, and the period #1 is before the network device #2 sends the handover request message
  • the time that the terminal device stays in the cell #2, that is, the period #1 may not be the time that the terminal device actually stays in the cell #2.
  • the time that the terminal equipment actually stays in the cell #2 is equal to the period #1 plus the period of time when the network equipment #2 sends the handover request message to the time when the terminal equipment changes to the cell #1.
  • the period #1 included in the movement history information #1 is t1
  • the period from when the network device #2 sends the handover request message (or the network device #1 receives the handover request message) to when the terminal device changes to the cell #1 is t2, Then the network device #1 can modify the period #1 to t1+t2.
  • the method 300 may further include S340: network device #1 sends movement history information to network device #3 (an example of a third network device) #2.
  • the network device #3 is the network device to which the cell #3 belongs. It can be understood that in the process of changing the terminal equipment from cell #1 to cell #3, cell #1 may be called the source cell, network equipment #1 may be called the source network equipment, and correspondingly, cell #3 may be called the target cell or candidate cell, network device #3 may be referred to as the target network device.
  • the target network device ie, network device #1
  • the target cell cell #1
  • Start recording the movement history information of the terminal device that is, start recording the history information of the terminal device in the target cell, so that more accurate movement history information of the terminal device can be recorded, so that the target network device can know the more accurate movement of the terminal device, so that To make some optimizations more accurate.
  • the target network device can modify the time that the terminal device stays in the source cell (cell #2) received in the handover request message, that is, the time from receiving the handover request message to the time when the terminal device successfully switches to the target cell is compensated to the terminal device.
  • the target network device can obtain more accurate historical information of the terminal device in the source cell, so as to perform some optimizations more accurately.
  • FIG. 4 is a schematic flowchart of a communication method 400 provided by an embodiment of the present application, shown from the perspective of device interaction. The method shown in FIG. 4 is illustrated by taking the terminal equipment switching from the source cell to the target cell using the DAPS switching mechanism as an example, and the steps in the method 400 are described in detail below.
  • the network device #2 sends a handover request message to the network device #1.
  • the network device #1 sends a handover request confirmation message to the network device #2.
  • the network device #2 sends a handover command to the terminal device.
  • the terminal device records the movement history information #4 at or after the time of determining the handover from cell #2 (an example of the second cell) to the cell #1 (an example of the first cell).
  • the movement history information #4 indicates that the terminal device is in History information of cell #2.
  • Movement history information #4 may include one or more of the following: CGI of cell #2, PCI of cell #2, center frequency of cell #2, period #6 (an example of the fourth period), period #6 is the terminal The time the device was in cell #2.
  • the terminal device records the movement history information #4 as the terminal device adds the movement history information #4 to a variable that stores the movement history information, that is, increases the CGI of cell #2 or the PCI and center frequency of cell #2, and adds Period #6, period #6 may be the time that the terminal device stays in cell #2 before changing to cell #1.
  • This embodiment of the present application does not limit how the terminal device determines whether to change from cell #2 to cell #1. It should be understood that, in different manners, the time at which the terminal device determines that the handover to cell #1 is successful may be different, and further, the time at which the terminal device records the movement history information #4 may also be different.
  • the terminal device determines that the handover from cell #2 to cell #1 is successful in the case that the random access of cell #1 is successful.
  • the terminal device determines that the random access in cell #1 is successful in the case of receiving the random access response signaling.
  • the terminal device determines that the random access of the terminal device in cell #1 is successful in the case of receiving the conflict resolution signaling.
  • the terminal device may record the movement history information #4 after determining that the random access to the cell #1 is successful or after.
  • the terminal equipment starts recording period #7 (an example of the fifth period) when it determines that the random access in cell #1 is successful, and period #7 is the time that the terminal equipment stays in cell #1. That is, before the terminal equipment succeeds in random access in cell #1, it is considered that the terminal equipment is in cell #2, and after the terminal equipment in cell #1 succeeds in random access, it is considered that the terminal equipment is in cell #1.
  • the terminal device determines to switch to cell #1 after receiving the indication information #4 sent by the network device #1, and the indication information #4 is used to instruct the terminal device to disconnect from the cell #2.
  • the terminal device may record the movement history information #4 at or after receiving the indication information #4.
  • the terminal device starts recording period #7 when it is determined that the random success in cell #1 is successful. That is, before the terminal device receives the indication information #4, it is considered that the terminal device is still in cell #2, and after the terminal device determines that the random access in cell #1 is successful, it is considered that the terminal device is in cell #1. That is, during the period from when the terminal equipment determines that the random access in cell #1 is successful to when the indication information #4 is received, it is considered that the terminal equipment stays in both cell #2 and cell #1. That is, the end point of the time that the terminal equipment stays in cell #2 is when the terminal equipment receives the indication information #4, and the start point of the time that the terminal equipment stays in cell #1 is when the terminal equipment determines that random access in cell #1 is successful.
  • the terminal device starts recording period #7 at the moment when the indication information #4 is received. That is, before the terminal equipment receives the indication information #4, it is considered that the terminal equipment is staying in the cell #2, and after the terminal equipment receives the indication information #4, it is considered that the terminal equipment is staying in the cell #1.
  • the movement history information #4 may further include indication information #6, where the indication information #6 is used to instruct the terminal device to switch from cell #2 to cell #1 using the DAPS handover mechanism.
  • the indication information #6 is also used to indicate a period #8 (an example of the sixth period), and the period #8 indicates the duration that the terminal device stays in both cell #2 and cell #1 during the DAPS handover process.
  • the method 400 may further include: S430, the terminal device sends the movement history information# to the network device #3 4.
  • the network device #3 is the network device to which the cell #3 belongs.
  • the terminal device during the handover process performed by the terminal device, when the terminal device determines that the handover is successful from the source cell (cell #2) to the target cell (cell #1), the terminal device records the history information of the source cell (that is, the Movement history information #4), so that more accurate movement history information of the terminal device can be recorded, so that the network device can know the more accurate movement situation of the terminal device, so as to perform some optimization more accurately.
  • the terminal device records the history information of the source cell (that is, the Movement history information #4), so that more accurate movement history information of the terminal device can be recorded, so that the network device can know the more accurate movement situation of the terminal device, so as to perform some optimization more accurately.
  • the minimization of drive tests (MDT) technology of automatic measurement collection (measurement collection) is introduced in the prior art to complete part of the traditional drive test work to detect and optimize the problems in the wireless network or malfunction.
  • the application scenarios of the MDT technology may include, for example, operators generally perform routine network coverage drive tests every month, or perform some network coverage drive tests for specific areas in response to user complaints, and so on.
  • the MDT technology can be applied to automatic measurement collection of base stations, such as quality of service (quality of service, QoS) measurement collection, cell signal quality measurement collection, or accessibility measurement collection, and the like.
  • quality of service quality of service
  • QoS quality of service
  • the measurement types of MDT technology can be divided into the following categories:
  • the terminal device measures the signal level of the wireless signal, such as reference signal receiving power (RSRP) or reference signal receiving quality (RSRQ), and reports the measurement collection results to Network equipment.
  • RSRP reference signal receiving power
  • RSRQ reference signal receiving quality
  • QoS measurements are usually performed by network devices, such as service traffic, service internet protocol (IP) throughput, service packet loss rate, or service processing delay, etc.
  • IP internet protocol
  • QoS measurement such as uplink processing delay
  • terminal equipment records random access channel (RACH) failure statistics, radio link failure (RLF) statistics, RRC connection access failure statistics, etc. information and report it to the network device.
  • RACH random access channel
  • RLF radio link failure
  • MDT includes logged MDT (logged MDT) (or called log MDT) and immediate MDT (immediate MDT).
  • Immediate MDT is mainly for the measurement collection performed by the terminal equipment in the RRC connected state (RRC_CONNECTED), while the logged MDT is mainly for the measurement collection performed by the terminal equipment in the idle state (RRC_IDLE) or the terminal equipment in the RRC inactive state (RRC_INACTIVE) (such as :
  • the terminal equipment in the idle state or the terminal equipment in the inactive state measures the cell of the frequency point corresponding to the currently camped cell and the inter-frequency/inter-system adjacent cell corresponding to the cell reselection broadcast in the currently camped cell, The terminal equipment records and reports these measurements).
  • Immediate MDT is generally used to measure the data volume, IP throughput rate, packet transmission delay, packet loss rate, and processing delay of terminal equipment.
  • the logged MDT generally refers to the measurement of the received signal strength by the UE.
  • some layer 2 measurements are also defined for the network side to count some network performance, so as to perform functions such as wireless link management, wireless resource management, and network maintenance.
  • Some of the Layer 2 measurements are statistics for a terminal device, such as service throughput, service flow, terminal device processing delay, and terminal device air interface delay.
  • the access network device will initiate the MDT measurement collection task.
  • One is to initiate signaling-based MDT (signalling based MDT), and the other is to initiate management-based MDT (management based MDT).
  • the signaling-based MDT refers to the MDT for a specific terminal device, and the access network device receives the message of performing MDT on a certain terminal device from the core network (core network, CN).
  • Management-based MDT is not an MDT for a specific terminal device.
  • An access network device receives a message for MDT from operation administration and maintenance (OAM) or element manager (EM).
  • OAM operation administration and maintenance
  • EM element manager
  • the access network device selects a terminal device from the terminal devices under the access network device based on a certain policy to perform MDT measurement collection.
  • the CN will not initiate signaling MDT for the UE unless the user has agreed to MDT.
  • the access network equipment may consider whether the terminal equipment agrees to perform MDT, for example, select only those terminal equipments that have agreed to perform MDT for MDT measurement collection.
  • the OAM can independently send management-based MDT measurement collection tasks to the CU-CP/CU-UP/CU-DU.
  • the CU-CP For the MDT measurement collection task based on signaling, if the task corresponding to the measurement type required in the MDT measurement collection task requires CU-UP/DU participation, when the CU-CP receives the MDT measurement collection task from the CN, the CU-CP The corresponding measurement task will be sent to the CU-UP or DU, thereby triggering the CU-UP or DU to perform MDT measurement. After receiving the MDT measurement result, the access network device or CU-CP/CU-UP/DU will send the MDT measurement result to the trace collection entity (TCE)
  • TCE trace collection entity
  • the terminal device may detect an in-device coexistence problem (In-Device Coexistence, IDC).
  • IDC In-Device Coexistence
  • the IDC problem means that the terminal device detects an interference problem in some subframes/slots when performing wireless communication with the network side device.
  • the IDC problem means that the terminal equipment cannot solve these interference problems by itself.
  • the IDC problem refers to the expectation that when these serving cells are activated, the terminal equipment will monitor the interference problem and cannot solve it by itself.
  • the IDC problem refers to the expectation that when the frequencies corresponding to these non-serving cells become the frequencies corresponding to serving cells, the terminal equipment will monitor the interference problem and cannot solve it by itself.
  • These IDC issues may affect the communication performance of end devices. If the network device collects the MDT measurement results and cannot know whether the terminal device detects IDC problems when the measurement results are acquired, it may obtain wrong conclusions when analyzing the MDT measurement results (for example, IDC interference will affect the accuracy of the MDT measurement results). If IDC interference is detected, the wireless signal quality of the cell in the base station detected in the MDT measurement result may be degraded, which cannot reflect the actual wireless performance).
  • an embodiment of the present application proposes a communication method, which can implement the association between the MDT measurement result obtained by the CU-CP/CU-UP/DU and the IDC result under the CU/DU architecture.
  • FIG. 5 shows a communication method provided by an embodiment of the present application. As shown in the figure, the method 500 may include S501 and S502, and each step will be described in detail below.
  • the DU or CU-UP sends a cell traffic trace (cell traffic trace) message to the CU-CP.
  • the CU-CP receives the cell traffic tracking message from the DU or CU-UP.
  • the message carries the tracking identifier and the TCE IP address.
  • the trace identifier may include a trace reference (trace reference) and a trace recording session reference (trace recording session reference).
  • the cell service tracking message may also carry a request message for requesting the CU-CP to report the IDC information detected by the terminal device.
  • the DU or CU-UP when the DU or CU-UP performs the MDT measurement, after obtaining the corresponding MDT measurement result, it will send the corresponding MDT measurement to the TCE.
  • the DU or CU-UP when the DU or CU-UP sends the MDT measurement results to the TCE, it also carries time information corresponding to the collection of these MDT measurement results (for example, the start time and end time of the MDT measurement corresponding to the MDT measurement results).
  • the CU-CP sends the IDC information to the TCE or CN.
  • the CU-CP can directly send the IDC information to the TCE or send the IDC information to the TCE through the CN.
  • the CU-CP After the CU-CP receives the cell service tracking message from the DU or CU-UP, the CU-CP sends the IDC information detected by the terminal device to the TCE or CN.
  • the CU-CP when the cell service tracking message carries a request message requesting to report the IDC information detected by the terminal device, the CU-CP sends the IDC information to the TCE or CN. It may also be that the CU-CP actively sends the IDC information to the TCE or the CN, which is not limited in this embodiment of the present application. That is to say, S501 is an optional step.
  • the CU-CP may learn the information that the terminal device detects IDC interference according to the message received from the terminal device.
  • the terminal device sends an RRC message (such as a terminal device auxiliary information message) to the CU-CP, and the RRC message includes information used to determine whether IDC interference is detected (for example, the RRC message carries a Boolean variable, when the value is 1 , the terminal equipment detects IDC interference, and when the value is 0, it means that the terminal equipment does not detect IDC interference.
  • an indication information is carried in the RRC message, and when the indication information is carried, the terminal equipment detects IDC interference on behalf of the terminal equipment. ; when the indication information is not carried, it means that the terminal device does not detect IDC interference).
  • the RRC message may also include frequency point information indicating that the frequency point where IDC interference is detected or frequency point information indicating that the frequency point is affected by IDC interference. That is, the terminal device can indicate to the network device whether interference is detected and at which frequency points the IDC problem is detected (for example, the RRC message carries a frequency point list, indicating that the IDC problem is detected in these frequency points).
  • the RRC message may also include information about the direction in which the IDC interference is detected, where the direction of the IDC interference may refer to who is the victim in the IDC interference, the victim of the IDC interference than the NR, or other wireless (such as Industrial, scientific, and medical bands (industrial, scientific and medical bands) or global navigation satellite systems (GNSS) are victims of IDC interference.
  • GNSS global navigation satellite systems
  • the RRC message includes an indication of which frequencies are detected in IDC problem and the information of the method for detecting IDC interference in these frequency points.
  • IDC information the above-mentioned information for determining whether to detect IDC interference, indicating that the corresponding frequency point information of the frequency point detecting IDC interference, and indicating Information about the direction in which IDC interference is detected
  • IDC information may also be referred to as IDC problem.
  • the terminal device may send the above-mentioned RRC message to the network device based on the notification or instruction of the network device.
  • the network device informs or instructs the terminal device which frequencies are interfered by the IDC through a message or instruction, and when the terminal device detects the IDC interference, it reports to the network device that these frequencies are interfered by the IDC.
  • the IDC information detected by the terminal device sent by the CU-CP to the TCE or CN includes at least one of the following: whether the terminal device detects the IDC, the frequency points corresponding to which cells the terminal device detects the IDC, and the frequency of the detected IDC. Start time and end time (or the length of time the IDC was detected). It should be noted that the terminal device may not continuously detect the IDC, that is, the IDC may be detected for a certain period of time, then the IDC may not be detected for a period of time, and then the IDC may be detected for a period of time. Therefore, the CU-CP may send multiple start and end times of detected IDCs (or durations of detected IDCs).
  • the CU-CP may carry the IDC information in the cell service tracking message sent to the CN.
  • the CN After the CN receives the IDC information, the CN sends the corresponding IDC information to the TCE.
  • the CU-CP When the CU-CP performs the MDT measurement, after obtaining the corresponding MDT measurement result, it will send the corresponding MDT measurement result to the TCE.
  • the TCE knows whether the corresponding MDT measurement result is affected by IDC interference.
  • the CU-CP or CU-UP or DU sends MDT measurement results to the TCE, and the TCE can obtain whether the MDT measurement results are affected by IDC interference, so that the MDT can be more accurately analyzed. measurement results.
  • the terminal device and/or the network device may execute some or all of the steps in the embodiments. These steps or operations are only examples, and the embodiments of the present application may also perform other operations or variations of various operations. In addition, various steps may be performed in different orders presented in various embodiments, and may not be required to perform all operations in the embodiments of the present application. Moreover, the size of the sequence number of each step does not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.
  • FIG. 6 is a schematic block diagram of a communication apparatus provided by an embodiment of the present application.
  • the communication apparatus 1000 may include a processing unit 1100 and a transceiver unit 1200 .
  • the communication apparatus 1000 may correspond to the terminal device in the above method embodiments, for example, may be a terminal device, or a component (such as a circuit, a chip or a chip system, etc.) configured in the terminal device.
  • the communication apparatus 1000 may correspond to the terminal equipment in the methods 200 to 400 according to the embodiments of the present application, and the communication apparatus 1000 may include a method for executing the method 200 in FIG. 2 , the method 300 in FIG. 3 , and the method in FIG. 4 . Elements of the method performed by the terminal device in the method 400 in .
  • each unit in the communication apparatus 1000 and the above-mentioned other operations and/or functions are respectively to implement the corresponding processes of the method 200 in FIG. 2 , the method 300 in FIG. 3 , and the method 400 in FIG. 4 . It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • the transceiver unit 1200 in the communication apparatus 1000 may be implemented by a transceiver, for example, may correspond to the transceiver 2020 in the communication apparatus 2000 shown in FIG. 7 or the transceiver 2020 shown in FIG. 8 .
  • the transceiver 3020 in the terminal device 3000 is output.
  • the processing unit 1100 in the communication apparatus 1000 may be implemented by at least one processor, for example, may correspond to the processor 2010 in the communication apparatus 2000 shown in FIG. 7 or the processor 3010 in the terminal device 3000 shown in FIG. 8 .
  • the transceiver unit 1200 in the communication apparatus 1000 may be implemented through input/output interfaces, circuits, etc., and the processing unit 1100 in the communication apparatus 1000 It can be implemented by a processor, microprocessor or integrated circuit integrated on the chip or chip system.
  • the communication apparatus 1000 may correspond to the network device in the above method embodiments, for example, may be a network device, or a component (such as a circuit, a chip, or a chip system, etc.) configured in the network device.
  • a component such as a circuit, a chip, or a chip system, etc.
  • the communication apparatus 1000 may correspond to the network equipment in the methods 200 to 400 according to the embodiments of the present application, and the communication apparatus 1000 may include a method for performing the method 200 in FIG. 2 , the method 300 in FIG. 4. Elements of a method performed by a network device in method 400.
  • each unit in the communication apparatus 1000 and the above-mentioned other operations and/or functions are respectively to implement the corresponding processes of the method 200 in FIG. 2 , the method 300 in FIG. 3 , and the method 400 in FIG. 4 .
  • the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • the transceiver unit 1200 in the communication apparatus 1000 may be implemented by a transceiver, for example, it may correspond to the transceiver 2020 in the communication apparatus 2000 shown in FIG. 7 or the transceiver 2020 shown in FIG. 9 .
  • the RRU 4100 in the outgoing base station 4000, the processing unit 1100 in the communication device 1000 may be implemented by at least one processor, for example, may correspond to the processor 2010 in the communication device 2000 shown in FIG. 7 or the processor 2010 shown in FIG. 8
  • the processing unit 4200 or the processor 4202 in the base station 4000 may be implemented by a transceiver, for example, it may correspond to the transceiver 2020 in the communication apparatus 2000 shown in FIG. 7 or the transceiver 2020 shown in FIG. 9 .
  • the RRU 4100 in the outgoing base station 4000, the processing unit 1100 in the communication device 1000 may be implemented by at least one processor, for example, may correspond to the processor 2010 in the communication device 2000 shown in FIG. 7 or the processor 2010 shown in FIG. 8
  • the transceiver unit 1200 in the communication device 1000 can be implemented through input/output interfaces, circuits, etc., and the processing unit 1100 in the communication device 1000 It can be implemented by a processor, microprocessor or integrated circuit integrated on the chip or chip system.
  • the communication apparatus 1000 may correspond to the DU in the above method embodiments, for example, may be a DU, or a component (such as a circuit, a chip, or a chip system, etc.) configured in the DU.
  • a component such as a circuit, a chip, or a chip system, etc.
  • the communication apparatus 1000 may correspond to the DU in the method 500 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for executing the method performed by the DU in the method 500 in FIG. 5 . Moreover, each unit in the communication device 1000 and the other operations and/or functions mentioned above are respectively for realizing the corresponding flow of the method 500 in FIG. 5 . It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • the communication apparatus 1000 may correspond to the CU-UP in the above method embodiments, for example, may be a CU-UP, or a component (such as a circuit, a chip, or a chip system, etc.) configured in the CU-UP.
  • a component such as a circuit, a chip, or a chip system, etc.
  • the communication device 1000 may correspond to the CU-UP in the method 500 according to the embodiment of the present application, and the communication device 1000 may include a unit for executing the method performed by the CU-UP in the method 500 in FIG. 5 . Moreover, each unit in the communication device 1000 and the other operations and/or functions mentioned above are respectively for realizing the corresponding flow of the method 500 in FIG. 5 . It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • the communication apparatus 1000 may correspond to the CU-CP in the above method embodiments, for example, may be the CU-CP, or a component (such as a circuit, a chip, or a chip system, etc.) configured in the CU-CP.
  • a component such as a circuit, a chip, or a chip system, etc.
  • the communication apparatus 1000 may correspond to the DU in the method 500 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for executing the method performed by the CU-CP in the method 500 in FIG. 5 . Moreover, each unit in the communication device 1000 and the other operations and/or functions mentioned above are respectively for realizing the corresponding flow of the method 500 in FIG. 5 . It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • the communication apparatus 1000 may correspond to the TCE in the above method embodiments, for example, may be a TCE, or a component (such as a circuit, a chip or a chip system, etc.) configured in the TCE.
  • the communication apparatus 1000 may correspond to the TCE in the method 500 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for executing the method performed by the TCE in the method 500 in FIG. 5 . Moreover, each unit in the communication device 1000 and the other operations and/or functions mentioned above are respectively for realizing the corresponding flow of the method 500 in FIG. 5 . It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • the communication apparatus 1000 may correspond to the CN in the above method embodiments, for example, may be the CN, or a component (such as a circuit, a chip, or a chip system, etc.) configured in the CN.
  • a component such as a circuit, a chip, or a chip system, etc.
  • the communication apparatus 1000 may correspond to the CN in the method 500 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for executing the method performed by the CN in the method 500 in FIG. 5 . Moreover, each unit in the communication device 1000 and the other operations and/or functions mentioned above are respectively for realizing the corresponding flow of the method 500 in FIG. 5 . It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • FIG. 7 is another schematic block diagram of a communication apparatus 2000 provided by an embodiment of the present application.
  • the communication apparatus 2000 includes a processor 2010 , a transceiver 2020 and a memory 2030 .
  • the processor 2010, the transceiver 2020 and the memory 2030 communicate with each other through an internal connection path, the memory 2030 is used to store instructions, and the processor 2010 is used to execute the instructions stored in the memory 2030 to control the transceiver 2020 to send signals and / or receive signals.
  • the communication apparatus 2000 may correspond to the terminal device in the above method embodiments, and may be used to execute various steps and/or processes performed by the network device or the terminal device in the above method embodiments.
  • the memory 2030 may include read only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory.
  • the memory 2030 may be a separate device or may be integrated in the processor 2010 .
  • the processor 2010 may be configured to execute the instructions stored in the memory 2030, and when the processor 2010 executes the instructions stored in the memory, the processor 2010 is configured to execute each of the foregoing method embodiments corresponding to the network device or the terminal device steps and/or processes.
  • the communication apparatus 2000 is the terminal device in the foregoing embodiment.
  • the communication apparatus 2000 is the network device in the foregoing embodiment.
  • the transceiver 2020 may include a transmitter and a receiver.
  • the transceiver 2020 may further include antennas, and the number of the antennas may be one or more.
  • the processor 2010, the memory 2030 and the transceiver 2020 may be devices integrated on different chips.
  • the processor 2010 and the memory 2030 may be integrated in a baseband chip, and the transceiver 2020 may be integrated in a radio frequency chip.
  • the processor 2010, the memory 2030 and the transceiver 2020 may also be devices integrated on the same chip. This application does not limit this.
  • the communication apparatus 2000 is a component configured in a terminal device, such as a circuit, a chip, a chip system, and the like.
  • the communication apparatus 2000 is a component configured in a network device, such as a circuit, a chip, a chip system, and the like.
  • the communication device 2000 is a component configured in the DU, such as a circuit, a chip, a chip system, and the like.
  • the communication device 2000 is a component configured in the CU-UP, such as a circuit, a chip, a chip system, and the like.
  • the communication apparatus 2000 is a component configured in the CU-CP, such as a circuit, a chip, a chip system, and the like.
  • the communication apparatus 2000 is a component configured in the TCE, such as a circuit, a chip, a chip system, and the like.
  • the communication device 2000 is a component configured in the CN, such as a circuit, a chip, a chip system, and the like.
  • the transceiver 2020 may also be a communication interface, such as an input/output interface, a circuit, and the like.
  • the transceiver 2020, the processor 2010 and the memory 2020 can be integrated in the same chip, such as integrated in a baseband chip.
  • FIG. 8 is a schematic structural diagram of a terminal device 3000 provided by an embodiment of the present application.
  • the terminal device 3000 can be applied to the system shown in FIG. 1 to perform the functions of the terminal device in the foregoing method embodiments.
  • the terminal device 3000 includes a processor 3010 and a transceiver 3020 .
  • the terminal device 3000 further includes a memory 3030 .
  • the processor 3010, the transceiver 3020 and the memory 3030 can communicate with each other through an internal connection path to transmit control and/or data signals.
  • the computer program is invoked and executed to control the transceiver 3020 to send and receive signals.
  • the terminal device 3000 may further include an antenna 3040 for sending the uplink data or uplink control signaling output by the transceiver 3020 through wireless signals.
  • the above-mentioned processor 3010 and the memory 3030 can be combined into a processing device, and the processor 3010 is configured to execute the program codes stored in the memory 3030 to realize the above-mentioned functions.
  • the memory 3030 may also be integrated in the processor 3010 or independent of the processor 3010 .
  • the processor 3010 may correspond to the processing unit 1100 in FIG. 6 or the processor 2010 in FIG. 7 .
  • the transceiver 3020 described above may correspond to the transceiver unit 1200 in FIG. 6 or the transceiver 2020 in FIG. 7 .
  • the transceiver 3020 may include a receiver (or called receiver, receiving circuit) and a transmitter (or called transmitter, transmitting circuit). Among them, the receiver is used for receiving signals, and the transmitter is used for transmitting signals.
  • the terminal device 3000 shown in FIG. 8 can implement various processes involving the terminal device in the method embodiments shown in FIGS. 2 to 4 .
  • the operations and/or functions of each module in the terminal device 3000 are respectively to implement the corresponding processes in the foregoing method embodiments.
  • the above-mentioned processor 3010 may be used to perform the actions described in the foregoing method embodiments that are implemented inside the terminal device, and the transceiver 3020 may be used to perform the operations described in the foregoing method embodiments that the terminal device sends to or receives from the network device. action.
  • the transceiver 3020 may be used to perform the operations described in the foregoing method embodiments that the terminal device sends to or receives from the network device. action.
  • the above-mentioned terminal device 3000 may further include a power supply 3050 for providing power to various devices or circuits in the terminal device.
  • the terminal device 3000 may further include one or more of an input unit 3060, a display unit 3070, an audio circuit 3080, a camera 3090, a sensor 3100, etc., the audio circuit Speakers 3082, microphones 3084, etc. may also be included.
  • FIG. 9 is a schematic structural diagram of a network device provided by an embodiment of the present application, which may be, for example, a schematic structural diagram of a base station.
  • the base station 4000 can be applied to the system shown in FIG. 1 to perform the functions of the network device in the foregoing method embodiments.
  • the base station 4000 may include one or more radio frequency units, such as a remote radio unit (RRU) 4100 and one or more baseband units (BBUs) (also referred to as distributed units (DUs). )) 4200.
  • RRU 4100 may be called a transceiver unit, which may correspond to the transceiver unit 1200 in FIG. 6 or the transceiver 2020 in FIG. 7 .
  • the RRU 4100 may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 4101 and a radio frequency unit 4102.
  • the RRU 4100 may include a receiving unit and a sending unit, the receiving unit may correspond to a receiver (or called a receiver, a receiving circuit), and the sending unit may correspond to a transmitter (or called a transmitter, a sending circuit).
  • the RRU 4100 part is mainly used for receiving and sending radio frequency signals and converting radio frequency signals to baseband signals, for example, for sending indication information to terminal equipment.
  • the part of the BBU 4200 is mainly used to perform baseband processing and control the base station.
  • the RRU 4100 and the BBU 4200 may be physically set together, or may be physically separated, that is, a distributed base station.
  • the BBU 4200 is the control center of the base station, and can also be called a processing unit, which can correspond to the processing unit 1100 in FIG. 6 or the processor 2010 in FIG. 7, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing , modulation, spread spectrum, etc.
  • the BBU processing unit
  • the BBU may be used to control the base station to perform the operation procedure of the network device in the foregoing method embodiments, for example, to generate the foregoing indication information and the like.
  • the BBU 4200 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as an LTE network) of a single access standard, or may respectively support a wireless access network of different access standards.
  • Wireless access network (such as LTE network, 5G network or other network).
  • the BBU 4200 also includes a memory 4201 and a processor 4202.
  • the memory 4201 is used to store necessary instructions and data.
  • the processor 4202 is configured to control the base station to perform necessary actions, for example, to control the base station to execute the operation flow of the network device in the foregoing method embodiments.
  • the memory 4201 and the processor 4202 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be provided on each single board.
  • the base station 4000 shown in FIG. 9 can implement various processes involving network devices in the method embodiments shown in FIGS. 2 to 4 .
  • the operations and/or functions of each module in the base station 4000 are respectively to implement the corresponding processes in the foregoing method embodiments.
  • the above-mentioned BBU 4200 may be used to perform the actions described in the foregoing method embodiments that are implemented internally by the network device, while the RRU 4100 may be used to perform the actions described in the foregoing method embodiments that the network device sends to or receives from the terminal device.
  • the RRU 4100 may be used to perform the actions described in the foregoing method embodiments that the network device sends to or receives from the terminal device.
  • the base station 4000 shown in FIG. 9 is only a possible form of network equipment, and should not constitute any limitation to the present application.
  • the method provided in this application can be applied to other forms of network equipment.
  • it includes AAU, may also include CU and/or DU, or includes BBU and adaptive radio unit (ARU), or BBU; may also be customer terminal equipment (customer premises equipment, CPE), may also be
  • AAU adaptive radio unit
  • BBU adaptive radio unit
  • CPE customer premises equipment
  • the CU and/or DU may be used to perform the actions implemented by the network device described in the foregoing method embodiments, and the AAU may be used to execute the network device described in the foregoing method embodiments to send or receive from the terminal device. Actions. For details, please refer to the descriptions in the foregoing method embodiments, which will not be repeated here.
  • the present application also provides a processing apparatus, including at least one processor, where the at least one processor is configured to execute a computer program stored in a memory, so that the processing apparatus executes the terminal device or network device in any of the foregoing method embodiments method performed.
  • the embodiment of the present application also provides a processing apparatus, which includes a processor and a communication interface.
  • the communication interface is coupled with the processor.
  • the communication interface is used to input and/or output information.
  • the information includes at least one of instructions and data.
  • the processor is configured to execute a computer program, so that the processing apparatus executes the method executed by the terminal device or the network device in any of the foregoing method embodiments.
  • Embodiments of the present application further provide a processing apparatus, including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory, so that the processing apparatus executes the method performed by the terminal device or the network device in any of the above method embodiments.
  • the above-mentioned processing device may be one or more chips.
  • the processing device may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), or a It is a central processing unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), or a microcontroller (microcontroller unit). , MCU), it can also be a programmable logic device (PLD) or other integrated chips.
  • FPGA field programmable gate array
  • ASIC application specific integrated circuit
  • SoC system on chip
  • MCU microcontroller unit
  • MCU programmable logic device
  • PLD programmable logic device
  • each step of the above-mentioned method can be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, detailed description is omitted here.
  • the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the aforementioned processors may be general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components .
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • the methods, steps, and logic block diagrams disclosed in the embodiments of this application can be implemented or executed.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in this embodiment 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 may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the present application also provides a computer program product, the computer program product includes: computer program code, when the computer program code is run on a computer, the computer is made to execute the steps shown in FIGS. 2 to 5 .
  • the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores program codes, and when the program codes are run on a computer, the computer is made to execute FIGS. 2 to 2 . 5.
  • the present application further provides a system, which includes one or more of the aforementioned terminal devices and one or more of the aforementioned network devices.
  • the network equipment in each of the above apparatus embodiments completely corresponds to the terminal equipment and the network equipment or terminal equipment in the method embodiments, and corresponding steps are performed by corresponding modules or units.
  • a processing unit processor
  • processor For functions of specific units, reference may be made to corresponding method embodiments.
  • the number of processors may be one or more.
  • the terminal device may be used as an example of a receiving device
  • the network device may be used as an example of a sending device.
  • the sending device and the receiving device may both be terminal devices or the like. This application does not limit the specific types of the sending device and the receiving device.
  • a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and the computing device may be components.
  • One or more components may reside within a process and/or thread of execution, and a component may be localized on one computer and/or distributed between 2 or more computers.
  • these components can execute from various computer readable media having various data structures stored thereon.
  • a component may, for example, be based on a signal having one or more data packets (eg, data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet interacting with other systems via signals) Communicate through local and/or remote processes.
  • data packets eg, data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet interacting with other systems via signals
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

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

Abstract

L'invention concerne un procédé de communication et un appareil de communication au moyen desquels des informations d'historique mobile plus précises d'un dispositif terminal peuvent être obtenues. Le procédé comprend les étapes suivantes : un premier dispositif réseau détermine qu'un dispositif terminal est transféré à une première cellule, le transfert comprenant un transfert de pile de protocoles actifs doubles (DAPS), un transfert de condition (CHO) ou un rétablissement de commande de ressources radio (RRC); et lorsque le premier dispositif réseau détermine, ou après qu'il a déterminé, que le dispositif terminal a été transféré à la première cellule, commencer à enregistrer des premières informations d'historique mobile, les premières informations d'historique mobile étant des informations d'historique, dans la première cellule, du dispositif terminal.
PCT/CN2020/109372 2020-08-14 2020-08-14 Procédé de communication et appareil de communication WO2022032687A1 (fr)

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CN202080103914.4A CN116097737A (zh) 2020-08-14 2020-08-14 通信的方法和通信装置

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