WO2021159371A9 - 一种切换处理方法、终端设备 - Google Patents

一种切换处理方法、终端设备 Download PDF

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Publication number
WO2021159371A9
WO2021159371A9 PCT/CN2020/075020 CN2020075020W WO2021159371A9 WO 2021159371 A9 WO2021159371 A9 WO 2021159371A9 CN 2020075020 W CN2020075020 W CN 2020075020W WO 2021159371 A9 WO2021159371 A9 WO 2021159371A9
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WO
WIPO (PCT)
Prior art keywords
network device
source network
terminal device
connection
random access
Prior art date
Application number
PCT/CN2020/075020
Other languages
English (en)
French (fr)
Other versions
WO2021159371A1 (zh
Inventor
尤心
李海涛
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to MX2022009981A priority Critical patent/MX2022009981A/es
Priority to CN202211400276.XA priority patent/CN115767647A/zh
Priority to BR112022015919A priority patent/BR112022015919A2/pt
Priority to CN202080083487.8A priority patent/CN114762293A/zh
Priority to EP20918350.8A priority patent/EP4087207B1/en
Priority to JP2022548495A priority patent/JP7429798B2/ja
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to KR1020227027928A priority patent/KR20220140738A/ko
Priority to CA3167804A priority patent/CA3167804A1/en
Priority to PCT/CN2020/075020 priority patent/WO2021159371A1/zh
Publication of WO2021159371A1 publication Critical patent/WO2021159371A1/zh
Priority to US17/882,710 priority patent/US20220386192A1/en
Publication of WO2021159371A9 publication Critical patent/WO2021159371A9/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0894—Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • H04W36/185—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection using make before break
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H04W36/083—Reselecting an access point wherein at least one of the access points is a moving node

Definitions

  • the present invention relates to the technical field of information processing, and in particular, to a switching processing method, a terminal device, a chip, a computer-readable storage medium, a computer program product, and a computer program.
  • the terminal device in the handover process of connecting the source network device and the target network device at the same time, the terminal device will keep the protocol stacks of the source cell and the target cell at the same time during the handover.
  • the terminal device may trigger some useless processing procedures, thereby bringing additional interruption time and processing complexity.
  • embodiments of the present invention provide a switching processing method, a terminal device, a chip, a computer-readable storage medium, a computer program product, and a computer program.
  • a first aspect provides a handover processing method, the method comprising:
  • the terminal device succeeds in random access to the target network device in the process of performing the first type of handover, the terminal device switches uplink data to the target network device and transmits it to the target network device, and the terminal device performs the following processing when the preset conditions are met One of:
  • connection of the source network device is released; the connection re-establishment with the source network device is not triggered; the random access procedure with the source network device is not triggered.
  • a terminal device including:
  • the communication unit in the process of performing the first type of handover, succeeds in randomly accessing the target network device, switches the uplink data for transmission to the target network device, and executes one of the following processes when the preset conditions are met:
  • connection of the source network device is released; the connection re-establishment with the source network device is not triggered; the random access procedure with the source network device is not triggered.
  • a terminal device 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 stored in the memory to execute the method in the first aspect or each of its implementations.
  • a chip is provided for implementing the methods in each of the foregoing implementations.
  • the chip includes: a processor for invoking and running a computer program from a memory, so that a device installed with the chip executes the method in the first aspect or each of its implementations.
  • a computer-readable storage medium for storing a computer program, and the computer program causes a computer to execute the method in the above-mentioned first aspect or each implementation manner thereof.
  • a computer program product comprising computer program instructions, the computer program instructions causing a computer to execute the method in the above-mentioned first aspect or each of its implementations.
  • a computer program which, when run on a computer, causes the computer to execute the method of the above-mentioned first aspect or each of its implementations.
  • the terminal device After the terminal device successfully randomly accesses the target network device in the process of performing the first type of handover, the terminal device releases the connection of the source network device under the condition that the preset condition is satisfied, or does not trigger the connection with the target network device.
  • the connection of the source network device is re-established, or the random access procedure with the source network device is not triggered.
  • it can be ensured that after the terminal device performs the first type of handover random access successfully and establishes a connection with the target network device, no useless connection is triggered between the terminal device and the source network device, and thus no additional extra costs are brought to the terminal device. Interruption time and additional processing complexity.
  • FIG. 1 is a schematic diagram 1 of a communication system architecture provided by an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a handover processing method according to an embodiment of the present invention
  • Fig. 3 is a kind of switching flow schematic diagram
  • FIG. 4 is a schematic flowchart 1 in an example provided by an embodiment of the present invention.
  • FIG. 5 is a second schematic flowchart in an example provided by an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of the composition of a terminal device provided by an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a composition structure of a communication device according to an embodiment of the present invention.
  • FIG. 8 is a schematic block diagram of a chip provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram 2 of a communication system architecture provided by an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • CDMA Wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with the UE 120 (or referred to as a communication terminal, a terminal).
  • the network device 110 may provide communication coverage for a particular geographic area and may communicate with UEs located within the coverage area.
  • the network device 110 may be a network device (Base Transceiver Station, BTS) in a GSM system or a CDMA system, or a network device (NodeB, NB) in a WCDMA system, or an evolution in an LTE system.
  • BTS Base Transceiver Station
  • NodeB, NB network device
  • WCDMA Wideband Code Division Multiple Access
  • Evolutional Node B eNB or eNodeB
  • a wireless controller in a cloud radio access network Cloud Radio Access Network, CRAN
  • the network equipment can be a mobile switching center, relay station, access point, Vehicle-mounted devices, wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in the future evolved Public Land Mobile Network (PLMN), etc.
  • PLMN Public Land Mobile Network
  • the communication system 100 also includes at least one UE 120 located within the coverage of the network device 110 .
  • UE includes, but is not limited to, connections via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connections; and/or another data connection/network; and/or via a wireless interface, e.g. for cellular networks, Wireless Local Area Networks (WLAN), digital television networks such as DVB-H networks, satellite networks, AM-FM A broadcast transmitter; and/or another UE's apparatus configured to receive/transmit communication signals; and/or an Internet of Things (IoT) device.
  • a UE arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", “wireless terminal” or “mobile terminal”.
  • direct terminal (Device to Device, D2D) communication may be performed between UEs 120 .
  • An embodiment of the present invention provides a handover processing method, as shown in FIG. 2 , the method includes:
  • Step 21 The terminal device successfully randomly accesses the target network device in the process of performing the first type of handover, the terminal device switches the uplink data to the target network device and transmits it to the target network device, and the terminal device meets the preset conditions. Do one of the following:
  • connection of the source network device is released; the connection re-establishment with the source network device is not triggered; the random access procedure with the source network device is not triggered.
  • the first type of handover is: during the handover process, the terminal device maintains the handover of the protocol stack with the source network device and the target network device.
  • the first type of handover can be referred to as dual active protocol stack (DAPS, dual active protocol stack) handover (HO, Handover).
  • DAPS dual active protocol stack
  • HO Handover
  • the network device may be a base station on the network side; the source network device may be the source base station connected to the terminal device, and the target network device may be the target base station.
  • the terminal device is a device that can maintain the connection with the source network device and the target network device at the same time during handover.
  • the New Radio (NR, New Radio) system supports the handover process of the terminal device in the connected state.
  • the system shall The communication link between the terminal equipment and the original cell is transferred to the new cell, that is, the handover process is performed.
  • the entire switching process is divided into the following three stages, as shown in FIG. 3 , including:
  • Handover preparation stage As shown in the figure 0-5, the target network device and the source network device process according to the mobility control information provided by the Access and Mobility Management Function (AMF, Access and Mobility Management Function); the terminal device measures For control and reporting, the source network device makes a handover decision, and then the source network device makes a handover request, management control, and handover request confirmation to the target network device.
  • the handover confirmation message includes the handover command generated by the target cell, and the source network device is not allowed to modify the handover command generated by the target network device, and directly forwards the handover command to the terminal device.
  • the terminal device executes the handover process immediately after receiving the handover command, which may include the radio access network (RAN, Radio Access Network) handover between the terminal device and the source network device , the terminal equipment disconnects the source cell and synchronizes with the target cell and establishes a connection (such as performing random access, sending an RRC handover complete message to the target base station, etc.); SN state transition; It may also include active network equipment transmission user plane functional entities ( UPF, User Plane Function), and transmit the cached data to the target network device.
  • RAN Radio Access Network
  • UPF User Plane Function
  • Handover completion stage As shown in Figure 8-12, after the RAN handover is completed, the terminal device transmits user data through the target network device, and the user data is transmitted between the target network device and the UPF; then the target network device Send a path switching request with AMF, UPF performs path switching, and then AMF notifies the target network device of the end of the path switching through the source network device, AMF sends a path switching request confirmation to the target network device, and then the target network device notifies the source network device to perform user data. release.
  • another switching scenario corresponding to this embodiment may also include the following two architectures:
  • the target network device is first added as an auxiliary node (SN), and then the SN is changed to the master node (MN) through role switching signaling, and finally the source network is added.
  • the device is released, so as to achieve the effect of reducing the interruption time when switching.
  • Another architecture is the switching of maintaining the connection with the source network device and the target network device at the same time.
  • HO command continue to maintain the connection with the source network device and initiate random access to the target network device, and release the connection of the source network device until the terminal device and the target network device are connected.
  • a DAPS (dual active protocol stack) optimization method for reducing the interruption time during handover is proposed.
  • the protocol stacks of the source network device and the target network device are maintained at the same time.
  • the terminal device After receiving the DAPS handover command, the terminal device maintains the connection of the source network device and initiates a synchronization process to the target network device.
  • the terminal device When the synchronization process/random access is completed, the terminal device will switch the uplink data, that is to say, the uplink data transmission of the network device will be switched from the source network device side to the target network device side after random access.
  • the release of the protocol stack of the source network device is based on the display indication of the network, that is to say, during the period after random access to the release of the connection of the source network device, the terminal device can normally receive the downlink sent by the source cell. data, and can send uplink feedback related information of the downlink data to the source cell, and the like.
  • the terminal device successfully randomly accesses the target network device in the process of performing the first type of handover (DAPS handover).
  • the protocol stack of the device or it is understood that the terminal device maintains a connection with the source network device.
  • how to avoid triggering a useless connection process and bring additional transmission interruption time to the terminal device and bring additional complexity is the problem to be solved by the solution provided in this embodiment.
  • the solution provided by this embodiment may include:
  • Step 41 The terminal device receives a handover command, and the handover command instructs the terminal device to perform the first type of handover, that is, DAPS handover.
  • Step 42 The terminal device performs a synchronization process/random access with the target network device based on the handover command. If the random access is successful, the terminal device switches the uplink data and transmits it to the target network device. If the preset conditions are met, the The terminal device performs one of the following processes:
  • connection of the source network device is released; the connection re-establishment with the source network device is not triggered; the random access procedure with the source network device is not triggered.
  • the preset condition includes: a radio link failure RLF occurs in the connection between the terminal device and the source network device;
  • the processing performed by the terminal device is: releasing the connection of the source network device; or not triggering the re-establishment of the connection with the source network device.
  • the terminal device releases the connection of the source cell;
  • the process of releasing the connection of the source network device may include: releasing the protocol stack of the source network device and the key related to the source network device.
  • the trigger condition of RLF is satisfied between the terminal device and the source network device, when it is determined that RLF occurs, the connection with the source network device is not re-established according to the existing protocol, but the connection with the source network device is released. connection between.
  • connection with the source network device is completely avoided by releasing the connection with the source network device, including the protocol stack corresponding to the original network device and other related information. , so that no connection re-establishment is performed either.
  • Step 51 In the case that the connection between the terminal device and the source network device has a radio link failure RLF, the re-establishment of the connection with the source network device is not triggered.
  • the trigger condition of RLF is satisfied between the terminal device and the source network device, when it is determined that RLF occurs, the connection between the terminal device and the source network device is not re-established according to the existing protocol, but the terminal device is controlled not to communicate with the source network device.
  • a process of connection re-establishment is performed between network devices.
  • This step may further include: if the processing performed by the terminal device is not to trigger the re-establishment of the connection with the source network device, the terminal device retains the protocol stack of the source network device.
  • the terminal device retains the protocol stack of the source network device.
  • step 52 the terminal device receives first indication information; the first indication information is used to instruct to release the connection of the source network device;
  • Step 53 The terminal device releases the connection of the source network device based on the first indication information.
  • the process of releasing the connection of the source network device includes: releasing the protocol stack of the source network device and the key related to the source network device.
  • the terminal device does not trigger the connection re-establishment, and retains the protocol stack of the source network device (or the relevant information of the source network device) until the displayed release is received.
  • the first indication information of the source network device is to say, if RLF occurs in the connection between the terminal device and the source network device, the terminal device does not trigger the connection re-establishment, and retains the protocol stack of the source network device (or the relevant information of the source network device) until the displayed release is received.
  • the first indication information of the source network device is to say, if RLF occurs in the connection between the terminal device and the source network device, the terminal device does not trigger the connection re-establishment, and retains the protocol stack of the source network device (or the relevant information of the source network device) until the displayed release is received.
  • the first indication information of the source network device is to say, if RLF occurs in the connection between the terminal device and the source network device, the terminal device does not trigger the connection re-establishment, and retains the
  • the first indication information for releasing the source network device may be sent by the source network device to the terminal device (or may also be sent by the target network device to the terminal device);
  • the first indication information may be carried by at least one type of downlink information or channel, for example, it may be carried by downlink control information (DCI, Downlink Control Information), or by radio resource control (RRC, Radio Resource Control) signaling, or by The medium access control (MAC, Medium Access Control) control element (CE, Control Element) is carried, or carried by the physical downlink shared channel PDSCH, or carried by the physical downlink control channel PDCCH, etc., which is not exhaustive here.
  • DCI downlink control information
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • CE Control Element
  • the terminal device reports to the target network device that an RLF occurs in connection with the source network device.
  • the terminal device when the terminal device determines that RLF occurs with the source network device, the terminal device reports to the target network device that the connection with the source network device occurs RLF;
  • the terminal device reports to the target network device that RLF occurs in connection with the source network device.
  • the trigger condition for RLF includes at least one of the following:
  • Expiry of a timer started after indication of radio problems from the physical layer after receiving an indication of a problem with the radio link sent by the physical layer; (if there is a problem with the radio link before the timer expires is recovered, then the terminal equipment stops the timer (if radio problems are recovered before the timer is expired, the UE stops the timer); for example, in one case, a loss of synchronization occurs to start the timer, in the The timer expires or expires, and the out-of-sync problem is not resolved, then RLF can be considered to have occurred.
  • Random access procedure failure with the source network device for example, it can be the process of triggering random access due to uplink out-of-synchronization, and a failure occurs; or, it can be the case of BFR If the random access processing fails under the trigger, and other situations, it can be considered that the RLF is sent.
  • Radio Link Control (RLC, Radio Link Control) failed.
  • the preset condition includes: a condition for triggering random access is satisfied between the terminal device and the source network device;
  • the terminal device When the preset conditions are met, the terminal device performs the following steps: releasing the connection of the source network device; or not triggering a random access procedure with the source network device.
  • the conditions for triggering random access include at least one of the following:
  • Uplink out-of-synchronization random access triggered by scheduling request SR; beam failure recovery BFR; connection re-establishment.
  • the terminal device successfully randomly accesses the target network device in the process of performing the first type of handover (DAPS handover)
  • the terminal device switches the uplink data and transmits it to the target network device
  • the The terminal device also maintains the protocol stack of the source network device, or it is understood that the terminal device maintains a connection with the source network device. Therefore, in this example, the random access procedure described refers to the random access procedure when the terminal device is in a connection state (with the source network device).
  • This example may further include: the terminal device reporting the processing status of the terminal device to the target network device.
  • the processing status of the terminal device may be reported to the target network device.
  • the processing status of the terminal device may be reported to the target network device.
  • the processing status of the terminal device includes at least: the reason why the terminal device triggers the random access procedure.
  • the reason for triggering the random access process may correspond to the aforementioned conditions for triggering random access. For example, if the condition for triggering random access is connection re-establishment, then the terminal device determines not to trigger the random access process with the source network device. , the second indication information may be sent to the target network device to indicate a random access process between the terminal device and the source network device triggered by connection re-establishment.
  • the reason for triggering the random access process may be a reason value, for example, the reason value A may correspond to uplink out-of-synchronization, etc., which is not exhaustive here.
  • the processing status of the aforementioned terminal equipment may also include a processing method of the terminal when the random access procedure is triggered, for example, the terminal equipment indicates itself to the target network equipment.
  • the processing status also includes: not triggering the random access procedure with the source network device, or releasing the connection of the source network device, and so on.
  • the terminal device may receive first indication information; the first indication information It is used to instruct to release the connection of the source network device; the terminal device releases the connection of the source network device based on the first indication information.
  • the terminal device after the terminal device successfully randomly accesses the target network device in the process of performing the first type of handover, releases the connection of the source network device under the condition that the preset conditions are met, or does not trigger the The connection with the source network device is re-established, or the random access procedure with the source network device is not triggered.
  • the terminal device performs the first type of handover random access successfully and establishes a connection with the target network device, no useless connection is triggered between the terminal device and the source network device, and thus no additional extra costs are brought to the terminal device. Interruption time and additional processing complexity.
  • An embodiment of the present invention provides a terminal switching device, as shown in FIG. 6 , including:
  • the communication unit 61 in the process of performing the first type of handover, succeeds in randomly accessing the target network device, switches the uplink data transmission to the target network device, and performs one of the following processes when the preset conditions are met:
  • connection of the source network device is released; the connection re-establishment with the source network device is not triggered; the random access procedure with the source network device is not triggered.
  • the first type of handover is: during the handover process, the terminal device maintains the handover of the protocol stack with the source network device and the target network device.
  • the first type of handover may be referred to as dual active protocol stack (DAPS, dual active protocol stack) handover (HO, Handover).
  • DAPS dual active protocol stack
  • HO Handover
  • the network device may be a base station on the network side; the source network device may be the source base station connected to the terminal device, and the target network device may be the target base station.
  • the terminal device is a device that can maintain the connection with the source network device and the target network device at the same time during handover.
  • the solution provided by this embodiment is: the terminal device successfully randomly accesses the target network device in the process of performing the first type of handover (DAPS handover), and when the terminal device switches the uplink data and transmits it to the target network device, all the The terminal device also maintains the protocol stack of the source network device, or it is understood that the terminal device maintains a connection with the source network device.
  • DAPS handover the first type of handover
  • the terminal device also maintains the protocol stack of the source network device, or it is understood that the terminal device maintains a connection with the source network device.
  • the preset condition includes: a radio link failure RLF occurs in the connection between the terminal device and the source network device;
  • the processing performed by the communication unit 61 when the preset condition is satisfied is: releasing the connection of the source network device; or not triggering the re-establishment of the connection with the source network device.
  • the communication unit 61 releases the connection of the source cell;
  • the process of releasing the connection of the source network device may include: releasing the protocol stack of the source network device and the key related to the source network device.
  • the re-establishment of the connection with the source network device is not triggered.
  • the terminal device may also include: if the processing performed by the terminal device is not to trigger the connection re-establishment with the source network device, the communication unit 61 of the terminal device retains the protocol stack of the source network device.
  • the terminal device only controls not to re-establish the connection, but retains the protocol stack of the source network device, or it is understood to retain the relevant information of the source network device.
  • the communication unit 61 of the terminal device receives first indication information; the first indication information is used to instruct to release the connection of the source network device; release the source network based on the first indication information device connection.
  • the process of releasing the connection of the source network device includes: releasing the protocol stack of the source network device and the key related to the source network device.
  • it may further include: the communication unit 61 of the terminal device reports to the target network device that an RLF occurs in connection with the source network device.
  • the trigger condition for RLF includes at least one of the following:
  • Expiry of a timer started after indication of radio problems from the physical layer after receiving an indication of a problem with the radio link sent by the physical layer; (if there is a problem with the radio link before the timer expires is recovered, then the terminal equipment stops the timer (if radio problems are recovered before the timer is expired, the UE stops the timer); for example, in one case, a loss of synchronization occurs to start the timer, in the The timer expires or expires, and the out-of-sync problem is not resolved, then RLF can be considered to have occurred.
  • Random access procedure failure with the source network device for example, it can be the process of triggering random access due to uplink out-of-synchronization, and a failure occurs; or, it can be the case of BFR If the random access processing fails under the trigger, and other situations, it can be considered that the RLF is sent.
  • Radio Link Control (RLC, Radio Link Control) failed.
  • the preset condition includes: a condition for triggering random access is satisfied between the terminal device and the source network device;
  • the processing performed by the communication unit 61 of the terminal device when the preset condition is satisfied is: releasing the connection of the source network device; or, not triggering the random access procedure with the source network device.
  • the conditions for triggering random access include at least one of the following:
  • Uplink out-of-synchronization random access triggered by scheduling request SR; beam failure recovery BFR; connection re-establishment.
  • This example may further include: the communication unit 61 of the terminal device reports the processing status of the terminal device to the target network device.
  • the processing status of the terminal device includes at least: the reason why the terminal device triggers the random access procedure.
  • the terminal device after the terminal device successfully randomly accesses the target network device in the process of performing the first type of handover, releases the connection of the source network device under the condition that the preset conditions are met, or does not trigger the The connection with the source network device is re-established, or the random access procedure with the source network device is not triggered. In this way, it can be ensured that after the terminal device successfully performs the first type of handover random access and establishes a connection with the target network device, no useless connection is triggered between the terminal device and the source network device, and thus no additional extra costs are brought to the terminal device. Interruption time and additional processing complexity.
  • FIG. 7 is a schematic structural diagram of a communication device 900 according to an embodiment of the present invention.
  • the communication device in this embodiment may be specifically the network device in the foregoing embodiments.
  • the communication device 900 shown in FIG. 7 includes a processor 910, and the processor 910 can call and run a computer program from a memory to implement the method in the embodiment of the present invention.
  • the communication device 900 may further include a memory 920 .
  • the processor 910 may call and run a computer program from the memory 920 to implement the method in the embodiment of the present invention.
  • the memory 920 may be a separate device independent of the processor 910 , or may be integrated in the processor 910 .
  • the communication device 900 may further include a transceiver 930, and the processor 910 may control the transceiver 930 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by a device.
  • the transceiver 930 may include a transmitter and a receiver.
  • the transceiver 930 may further include antennas, and the number of the antennas may be one or more.
  • the communication device 900 may specifically be a terminal device or a network device in the embodiment of the present invention, and the communication device 900 may implement the corresponding processes implemented by the mobile terminal/terminal device in each method in the embodiment of the present invention. It is concise and will not be repeated here.
  • FIG. 8 is a schematic structural diagram of a chip according to an embodiment of the present invention.
  • the chip 1000 shown in FIG. 8 includes a processor 1010, and the processor 1010 can call and run a computer program from a memory to implement the method in the embodiment of the present invention.
  • the chip 1000 may further include a memory 1020 .
  • the processor 1010 may call and run a computer program from the memory 1020 to implement the method in the embodiment of the present invention.
  • the memory 1020 may be a separate device independent of the processor 1010, or may be integrated in the processor 1010.
  • the chip 1000 may further include an input interface 1030 .
  • the processor 1010 can control the input interface 1030 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.
  • the chip 1000 may further include an output interface 1040 .
  • the processor 1010 can control the output interface 1040 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.
  • the chip can be applied to the corresponding processes implemented by the terminal device in each method in the embodiment of the present invention, which is not repeated here for brevity.
  • the chip mentioned in the embodiments of the present invention may also be referred to as a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-chip, or the like.
  • the processor in this embodiment of the present invention may be an integrated circuit chip, which has the capability of processing signals.
  • 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 above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Programming logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • Various methods, steps, and logical block diagrams disclosed in the embodiments of the present invention 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 invention 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 module 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 the embodiment of the present invention 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 a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). 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 Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • synchronous link dynamic random access memory Synchlink DRAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in this embodiment of the present invention may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, memory in embodiments of the present invention is intended to include, but not be limited to, these and any other suitable types of memory.
  • FIG. 9 is a schematic block diagram of a communication system 800 provided by an embodiment of the present application.
  • the communication system 800 includes a terminal device 810 and a network device 820 .
  • the network device may include an active network device or a target network device.
  • the terminal device 810 can be used to implement the corresponding functions implemented by the UE in the above method
  • the network device 820 can be used to implement the above method on the source network device side or the method on the target network device side is implemented by the network device
  • the corresponding functions of for the sake of brevity, are not repeated here.
  • Embodiments of the present invention further provide a computer-readable storage medium for storing a computer program.
  • the computer-readable storage medium can be applied to a network device or a terminal device in the embodiment of the present invention, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present invention. , and will not be repeated here.
  • Embodiments of the present invention also provide a computer program product, including computer program instructions.
  • the computer program product may be applied to a network device or a terminal device in the embodiment of the present invention, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in each method of the embodiment of the present invention.
  • the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in each method of the embodiment of the present invention.
  • the embodiment of the present invention also provides a computer program.
  • the computer program may be applied to a network device or a terminal device in the embodiment of the present invention, and when the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in each method of the embodiment of the present invention. , for brevity, will not be repeated here.
  • the disclosed systems, devices and methods 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 invention 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 invention 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 invention.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

本发明公开了一种切换处理方法、终端设备、芯片、计算机可读存储介质、计算机程序产品以及计算机程序，所述方法包括：终端设备在执行第一类切换的过程中与目标网络设备随机接入成功，所述终端设备切换上行数据传输至所述目标网络设备，在满足预设条件的情况下所述终端设备执行以下处理中之一：释放源网络设备的连接；不触发与所述源网络设备的连接重建立；不触发与所述源网络设备的随机接入过程。

Description

一种切换处理方法、终端设备 技术领域
本发明涉及信息处理技术领域，尤其涉及一种切换处理方法、终端设备、芯片、计算机可读存储介质、计算机程序产品以及计算机程序。
背景技术
相关技术中，对于同时连接源网络设备以及目标网络设备的切换处理中，在切换期间终端设备会同时保持源小区和目标小区的协议栈。然而，这样的处理方式，可能终端设备触发一些无用的处理过程，从而带来额外的中断时间以及处理复杂度。
发明内容
为解决上述技术问题，本发明实施例提供了一种切换处理方法、终端设备、芯片、计算机可读存储介质、计算机程序产品以及计算机程序。
第一方面，提供一种切换处理方法，所述方法包括：
终端设备在执行第一类切换的过程中与目标网络设备随机接入成功，所述终端设备切换上行数据传输至所述目标网络设备，在满足预设条件的情况下所述终端设备执行以下处理中之一：
释放源网络设备的连接；不触发与所述源网络设备的连接重建立；不触发与所述源网络设备的随机接入过程。
第二方面，提供了一种终端设备，包括：
通信单元，在执行第一类切换的过程中与目标网络设备随机接入成功，切换上行数据传输至所述目标网络设备，在满足预设条件的情况下执行以下处理中之一：
释放源网络设备的连接；不触发与所述源网络设备的连接重建立；不触发与所述源网络设备的随机接入过程。
第三方面，提供了一种终端设备，包括处理器和存储器。该存储器用 于存储计算机程序，该处理器用于调用并运行该存储器中存储的计算机程序，执行上述第一方面或其各实现方式中的方法。
第四方面，提供了一种芯片，用于实现上述各实现方式中的方法。
具体地，该芯片包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有该芯片的设备执行如上述第一方面或其各实现方式中的方法。
第五方面，提供了一种计算机可读存储介质，用于存储计算机程序，该计算机程序使得计算机执行上述第一方面或其各实现方式中的方法。
第六方面，提供了一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行上述第一方面或其各实现方式中的方法。
第七方面，提供了一种计算机程序，当其在计算机上运行时，使得计算机执行上述第一方面或其各实现方式中的方法。
通过采用上述方案，终端设备在执行第一类切换的过程中与目标网络设备随机接入成功之后，在满足预设条件的情况下所述终端设备释放源网络设备的连接，或者不触发与所述源网络设备的连接重建立，或者不触发与所述源网络设备的随机接入过程。如此，能够保证终端设备在执行第一类切换随机接入成功并且与目标网络设备建立连接后，终端设备与源网络设备之间不会触发无用的连接，进而不会为终端设备带来额外的中断时间以及额外的处理复杂度。
附图说明
图1是本申请实施例提供的一种通信系统架构的示意性图一；
图2为本发明实施例提供的一种切换处理方法流程示意图；
图3为一种切换流程示意图；
图4为本发明实施例提供的一种示例中的流程示意图一；
图5为本发明实施例提供的一种示例中的流程示意图二；
图6为本发明实施例提供的终端设备组成结构示意图；
图7为本发明实施例提供的一种通信设备组成结构示意图；
图8是本申请实施例提供的一种芯片的示意性框图；
图9是本申请实施例提供的一种通信系统架构的示意性图二。
具体实施方式
为了能够更加详尽地了解本发明实施例的特点与技术内容，下面结合附图对本发明实施例的实现进行详细阐述，所附附图仅供参考说明之用，并非用来限定本发明实施例。
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、全球互联微波接入(Worldwide Interoperability for Microwave Access，WiMAX)通信系统或5G系统等。
示例性的，本申请实施例应用的通信系统100可以如图1所示。该通信系统100可以包括网络设备110，网络设备110可以是与UE120(或称为通信终端、终端)通信的设备。网络设备110可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖区域内的UE进行通信。可选地，该网络设备110可以是GSM系统或CDMA系统中的网络设备(Base Transceiver Station，BTS)，也可以是WCDMA系统中的网络设备(NodeB，NB)，还可以是LTE系统中的演进型网络设备(Evolutional Node B，eNB或eNodeB)，或者是云无线接入网络(Cloud Radio Access Network，CRAN)中的无线控制器，或者该网络设备可以为移动交换中心、中继站、接入点、车载设备、可穿戴设备、集线器、交换机、网桥、路由器、5G网络中的网络侧设备或 者未来演进的公共陆地移动网络(Public Land Mobile Network，PLMN)中的网络设备等。
该通信系统100还包括位于网络设备110覆盖范围内的至少一个UE120。作为在此使用的“UE”包括但不限于经由有线线路连接，如经由公共交换电话网络(Public Switched Telephone Networks，PSTN)、数字用户线路(Digital Subscriber Line，DSL)、数字电缆、直接电缆连接；和/或另一数据连接/网络；和/或经由无线接口，如，针对蜂窝网络、无线局域网(Wireless Local Area Network，WLAN)、诸如DVB-H网络的数字电视网络、卫星网络、AM-FM广播发送器；和/或另一UE的被设置成接收/发送通信信号的装置；和/或物联网(Internet of Things，IoT)设备。被设置成通过无线接口通信的UE可以被称为“无线通信终端”、“无线终端”或“移动终端”。
可选地，UE120之间可以进行终端直连(Device to Device，D2D)通信。
应理解，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
为了能够更加详尽地了解本发明实施例的特点与技术内容，下面结合附图对本发明实施例的实现进行详细阐述，所附附图仅供参考说明之用，并非用来限定本发明实施例。
本发明实施例提供一种切换处理方法，如图2所示，所述方法包括：
步骤21：终端设备在执行第一类切换的过程中与目标网络设备随机接入成功，所述终端设备切换上行数据传输至所述目标网络设备，在满足预设条件的情况下所述终端设备执行以下处理中之一：
释放源网络设备的连接；不触发与所述源网络设备的连接重建立；不触发与所述源网络设备的随机接入过程。
其中，所述第一类切换，为：在切换过程中终端设备保持与源网络设备以及目标网络设备之间的协议栈的切换。可以将所述第一类切换称为双 激活栈(DAPS，dual active protocol stack)切换(HO，Handover)。
本实施例中，网络设备可以为网络侧的基站；源网络设备可以为终端设备连接的源基站，目标网络设备可以为目标基站。终端设备为切换时能够同时保持与源网络设备和目标网络设备的连接的设备。
首先针对本实施例的场景进行说明，与LTE系统相似，新无线(NR，New Radio)系统支持连接态终端设备的切换过程。当正在使用网络服务的终端设备从一个小区移动到另一个小区，或由于无线传输业务负荷量调整、激活操作维护、设备故障等原因，为了保证通信的连续性和服务的质量，系统要将该终端设备与原小区的通信链路转移到新的小区上，即执行切换过程。以Xn接口切换过程为例所对应的一种切换处理为例进行说明，整个切换过程分为以下三个阶段，可以参见图3所示，包括：
切换准备阶段：如图中所示的0-5，目标网络设备以及源网络设备根据访问和移动性管理功能实体(AMF，Access and Mobility Management Function)提供的移动控制信息进行处理；终端设备进行测量控制及上报，源网络设备进行切换决策，然后由源网络设备向目标网络设备进行切换请求、管理控制以及切换请求确认。其中，在切换确认消息中包含目标小区生成的切换命令，并且不允许源网络设备对目标网络设备生成的切换命令进行任何修改，直接将切换命令转发给终端设备。
切换执行阶段：如图中6-7所示，终端设备在收到切换命令后立即执行切换过程，可以包括有终端设备与源网络设备之间进行无线接入网(RAN，Radio Access Network)切换，终端设备断开源小区并与目标小区进行同步并建立连接(如执行随机接入，发送RRC切换完成消息给目标基站等)；SN状态转移；还可以包括有源网络设备传输用户面功能实体(UPF，User Plane Function)的新数据，并且将缓存数据传输至目标网络设备。
切换完成阶段：如图中8-12所示，RAN切换完成之后，终端设备通过目标网络设备之间进行用户数据的传输，并且目标网络设备与UPF之间进行用户数据的传输；然后目标网络设备与AMF发送路径切换请求，由UPF执行路径切换，然后由AMF通过源网络设备通知目标网络设备路径切换结束，AMF向目标网络设备发送路径切换请求确认，然后目标网络设备通知源网络设备进行用户数据的释放。
另外，本实施例对应的又一种切换场景还可以为包括以下两种架构：
基于双连接的切换，这种情况下，在切换时，先把目标网络设备添加为辅助接点(SN)，然后通过角色转换信令来把SN变为主节点(MN)，最后再把源网络设备释放掉，从而达到切换时候中断时间减小的效果。
另一架构为同时保持与源网络设备和目标网络设备的连接的切换，可以理解为先建立后断链(eMBB，Enhanced make-before-break)的切换，这种切换不同在于终端设备在收到切换命令(HO command)时，继续保持和源网络设备的连接同时向目标网络设备发起随机接入，直到终端设备与目标网络设备接入完成才释放源网络设备的连接。
进一步地，在3GPP移动性增强课题(包括LTE和NR)中，提出了对于切换时减小中断时间的DAPS(dual active protocol stack双激活协议栈)优化方法，主要是在切换期间，终端设备会同时保持源网络设备和目标网络设备的协议栈。当终端设备收到DAPS切换命令后，保持源网络设备的连接，并向目标网络设备发起同步过程。当同步过程/随机接入完成时，终端设备会进行上行数据的切换，也就是说随机接入后网络设备的上行数据传输会从源网络设备侧切换到目标网络设备侧。而随机接入后，源网络设备协议栈的释放是基于网络的显示指示的，也就是说在随机接入后至释放源网络设备的连接这期间，终端设备是可以正常接收源小区发送的下行数据，并且可以向源小区发送所述下行数据的上行反馈相关信息等。
终端设备在执行第一类切换(DAPS切换)的过程中与目标网络设备随机接入成功，所述终端设备切换上行数据传输至所述目标网络设备的同时，所述终端设备还保持了源网络设备的协议栈，或者理解为终端设备保持与源网络设备之间的连接。这种场景中，如何避免触发无用的连接过程，及其给终端设备带来额外的传输中断时间，并且带来额外的复杂度，是本实施例提供的方案所要解决的问题。如图4所示，本实施例提供的方案可以包括：
步骤41、终端设备接收切换命令，该切换命令指示终端设备执行第一类切换，也就是DAPS切换。
步骤42、终端设备基于所述切换命令执行与目标网络设备的同步过程/随机接入，若随机接入成功，则终端设备切换上行数据传输至目标网络设 备，在满足预设条件的情况下所述终端设备执行以下处理中之一：
释放源网络设备的连接；不触发与所述源网络设备的连接重建立；不触发与所述源网络设备的随机接入过程。
基于前述，结合示例进行说明：
示例1、所述预设条件包括：所述终端设备与源网络设备的连接发生无线链路失败RLF；
在满足预设条件的情况下所述终端设备执行的处理为：释放源网络设备的连接；或者，不触发与所述源网络设备的连接重建立。
一种情况下：
所述终端设备与源网络设备(或者源小区)的连接发生无线链路失败RLF的情况下，则终端设备释放所述源小区的连接；
其中，释放所述源网络设备的连接的处理中，可以包括：释放所述源网络设备的协议栈、以及与所述源网络设备相关的密钥。
也就是，如果终端设备与源网络设备之间满足RLF的触发条件，确定发生RLF的时候，不按照现有协议规定进行与源网络设备之间的连接重建立，而是释放与源网络设备之间的连接。
换句话说，一旦终端设备与源网络设备之间发生RLF，通过释放与源网络设备之间的连接，包括原网络设备对应的协议栈等相关信息，来完全避免与源网络设备之间的连接，从而也不会执行连接重建立。
另一种情况下，如图5所示，
步骤51：所述终端设备与源网络设备的连接发生无线链路失败RLF的情况下，不触发与所述源网络设备的连接重建立。
也就是，如果终端设备与源网络设备之间满足RLF的触发条件，确定发生RLF的时候，不按照现有协议规定进行与源网络设备之间的连接重建立，而是控制终端设备不与源网络设备之间执行连接重建立的处理。
本步骤中还可以包括：若所述终端设备执行的处理为不触发与所述源网络设备的连接重建立，则所述终端设备保留所述源网络设备的协议栈。与上一示例不同之处在于，本示例中，这种情况下，终端设备仅控制不进行连接重建立，但是会保留源网络设备的协议栈，或者，理解为保留源网络设备的相关信息。
在此基础上，步骤52：所述终端设备接收到第一指示信息；所述第一指示信息用于指示释放所述源网络设备的连接；
步骤53：所述终端设备基于所述第一指示信息释放所述源网络设备的连接。其中，释放所述源网络设备的连接的处理中，包括：释放所述源网络设备的协议栈、以及与所述源网络设备相关的密钥。
也就是说，如果终端设备与源网络设备的连接发生了RLF，则终端设备不触发连接重建立，并且保留源网络设备的协议栈(或者源网络设备的相关信息)，直到收到显示的释放源网络设备的第一指示信息。
其中，释放源网络设备的第一指示信息，可以为源网络设备发送给终端设备的(或者，还可以为目标网络设备发送给终端设备的)；
该第一指示信息可以由至少一种下行信息或信道携带，比如，可以由下行控制信息(DCI，Downlink Control Information)携带、或者由无线资源控制(RRC，Radio Resource Control)信令携带、或者由介质访问控制(MAC，Medium Access Control)控制元素(CE，Control Element)携带、或者由物理下行共享信道PDSCH携带、或者由物理下行控制信道PDCCH携带等等，这里不进行穷举。
另外，本示例中，还可以包括：所述终端设备向所述目标网络设备上报与源网络设备的连接发生RLF。
比如，可以为执行步骤51的过程中，所述终端设备确定与源网络设备发生RLF的情况下，所述终端设备向所述目标网络设备上报与源网络设备的连接发生RLF；
又或者，可以执行步骤52或步骤53的处理过程中，比如，在接收到第一指示信息之前(或之后)，所述终端设备向所述目标网络设备上报与源网络设备的连接发生RLF。
本示例中，RLF的触发条件包括以下至少之一：
在收到物理层发送的无线链路出现问题的指示后，定时器到期(Expiry of a timer started after indication of radio problems from the physical layer)；(如果在定时器到期之前无线链路出现问题被恢复，那么终端设备停止定时器(if radio problems are recovered before the timer is expired,the UE stops the timer)；举例来说，一种情况中，发生失步的情况启动所述定时器，在该定 时器超时或到期，并且该失步问题未解决，那么就可以认为发生RLF。
与源网络设备之间的随机接入过程失败(Random access procedure failure)；举例来说，可以为在由于上行失步的情况下触发随机接入的处理，发生失败；或者，可以为BFR的情况下触发随机接入处理发生失败，等情况都可以认为是发送RLF。
无线链路控制(RLC，Radio Link Control)失败。
示例2、
所述预设条件，包括：所述终端设备与源网络设备间，满足触发随机接入的条件；
在满足预设条件的情况下所述终端设备执行的处理为：释放源网络设备的连接；或者，不触发与源网络设备随机接入过程。
本示例中，触发随机接入的条件包括以下至少之一：
上行失步；调度请求SR触发的随机接入；波束失败恢复BFR；连接重建立。
由于本实施例针对的场景为终端设备在执行第一类切换(DAPS切换)的过程中与目标网络设备随机接入成功，所述终端设备切换上行数据传输至所述目标网络设备的同时，所述终端设备还保持了源网络设备的协议栈，或者理解为终端设备保持与源网络设备之间的连接。因此，本示例中，所描述的随机接入过程指的是终端设备处于(与源网络设备的)连接态时的随机接入过程。
本示例还可以包括：所述终端设备向目标网络设备上报所述终端设备的处理状况。
具体的，如果终端设备在满足预设条件的情况下释放源网络设备的连接，可以向目标网络设备上报所述终端设备的处理状况。
或者，如果终端设备在满足预设条件的情况下不触发与源网络设备随机接入过程，可以向目标网络设备上报所述终端设备的处理状况。
其中，所述终端设备的处理状况，至少包括：终端设备触发随机接入过程的原因。
其中，触发随机接入过程的原因可以与前述触发随机接入的条件对应，比如，触发随机接入的条件为连接重建立，那么终端设备在确定不触发与 源网络设备随机接入过程的情况中，可以向目标网络设备发送第二指示信息，以指示所述终端设备与源网络设备之间由于发生连接重建立触发的随机接入过程。
再进一步地，所述触发随机接入过程的原因，可以为原因值，比如，原因值A，可以对应于上行失步等等，这里不做穷举。
另外，前述终端设备的处理状况，除了前述触发随机接入过程的原因之外，还可以包括有终端在满足触发随机接入过程的情况中的处理方式，比如，终端设备向目标网络设备指示自身的处理状况还包括有：不触发与源网络设备随机接入过程，或者，释放源网络设备的连接等等。
在一种方式中，不触发与源网络设备随机接入过程的情况下，也可以结合前述示例中的部分处理，比如，所述终端设备可以接收到第一指示信息；所述第一指示信息用于指示释放所述源网络设备的连接；所述终端设备基于所述第一指示信息释放所述源网络设备的连接。
可见，通过采用上述方案，终端设备在执行第一类切换的过程中与目标网络设备随机接入成功之后，在满足预设条件的情况下所述终端设备释放源网络设备的连接，或者不触发与所述源网络设备的连接重建立，或者不触发与所述源网络设备的随机接入过程。如此，能够保证终端设备在执行第一类切换随机接入成功并且与目标网络设备建立连接后，终端设备与源网络设备之间不会触发无用的连接，进而不会为终端设备带来额外的中断时间以及额外的处理复杂度。
本发明实施例提供一种切终端设备，如图6所示，包括：
通信单元61，在执行第一类切换的过程中与目标网络设备随机接入成功，切换上行数据传输至所述目标网络设备，在满足预设条件的情况下执行以下处理中之一：
释放源网络设备的连接；不触发与所述源网络设备的连接重建立；不触发与所述源网络设备的随机接入过程。
其中，所述第一类切换，为：在切换过程中终端设备保持与源网络设备以及目标网络设备之间的协议栈的切换。可以将所述第一类切换称为双激活栈(DAPS，dual active protocol stack)切换(HO，Handover)。
本实施例中，网络设备可以为网络侧的基站；源网络设备可以为终端设备连接的源基站，目标网络设备可以为目标基站。终端设备为切换时能够同时保持与源网络设备和目标网络设备的连接的设备。
本实施例提供的方案为：终端设备在执行第一类切换(DAPS切换)的过程中与目标网络设备随机接入成功，所述终端设备切换上行数据传输至所述目标网络设备的同时，所述终端设备还保持了源网络设备的协议栈，或者理解为终端设备保持与源网络设备之间的连接。这种场景中，如何避免触发无用的连接过程，及其给终端设备带来额外的传输中断时间，并且带来额外的复杂度。
基于前述，结合示例进行说明：
示例1、所述预设条件包括：所述终端设备与源网络设备的连接发生无线链路失败RLF；
所述通信单元61在满足预设条件的情况下执行的处理为：释放源网络设备的连接；或者，不触发与所述源网络设备的连接重建立。
一种情况下：
所述终端设备的通信单元61与源网络设备(或者源小区)的连接发生无线链路失败RLF的情况下，则通信单元61释放所述源小区的连接；
其中，释放所述源网络设备的连接的处理中，可以包括：释放所述源网络设备的协议栈、以及与所述源网络设备相关的密钥。
另一种情况下：
通信单元61与源网络设备的连接发生无线链路失败RLF的情况下，不触发与所述源网络设备的连接重建立。
还可以包括：若所述终端设备执行的处理为不触发与所述源网络设备的连接重建立，则所述终端设备的通信单元61保留所述源网络设备的协议栈。与上一示例不同之处在于，本示例中，这种情况下，终端设备仅控制不进行连接重建立，但是会保留源网络设备的协议栈，或者，理解为保留源网络设备的相关信息。
在此基础上，所述终端设备的通信单元61接收到第一指示信息；所述第一指示信息用于指示释放所述源网络设备的连接；基于所述第一指示信息释放所述源网络设备的连接。其中，释放所述源网络设备的连接的处理 中，包括：释放所述源网络设备的协议栈、以及与所述源网络设备相关的密钥。
另外，本示例中，还可以包括：所述终端设备的通信单元61向所述目标网络设备上报与源网络设备的连接发生RLF。
本示例中，RLF的触发条件包括以下至少之一：
在收到物理层发送的无线链路出现问题的指示后，定时器到期(Expiry of a timer started after indication of radio problems from the physical layer)；(如果在定时器到期之前无线链路出现问题被恢复，那么终端设备停止定时器(if radio problems are recovered before the timer is expired,the UE stops the timer)；举例来说，一种情况中，发生失步的情况启动所述定时器，在该定时器超时或到期，并且该失步问题未解决，那么就可以认为发生RLF。
与源网络设备之间的随机接入过程失败(Random access procedure failure)；举例来说，可以为在由于上行失步的情况下触发随机接入的处理，发生失败；或者，可以为BFR的情况下触发随机接入处理发生失败，等情况都可以认为是发送RLF。
无线链路控制(RLC，Radio Link Control)失败。
示例2、
所述预设条件，包括：所述终端设备与源网络设备间，满足触发随机接入的条件；
所述终端设备的通信单元61在满足预设条件的情况下执行的处理为：释放源网络设备的连接；或者，不触发与源网络设备随机接入过程。
本示例中，触发随机接入的条件包括以下至少之一：
上行失步；调度请求SR触发的随机接入；波束失败恢复BFR；连接重建立。
本示例还可以包括：所述终端设备的通信单元61向目标网络设备上报所述终端设备的处理状况。
其中，所述终端设备的处理状况，至少包括：终端设备触发随机接入过程的原因。
可见，通过采用上述方案，终端设备在执行第一类切换的过程中与目标网络设备随机接入成功之后，在满足预设条件的情况下所述终端设备释 放源网络设备的连接，或者不触发与所述源网络设备的连接重建立，或者不触发与所述源网络设备的随机接入过程。如此，能够保证终端设备在执行第一类切换随机接入成功并且与目标网络设备建立连接后，终端设备与源网络设备之间不会触发无用的连接，进而不会为终端设备带来额外的中断时间以及额外的处理复杂度。
图7是本发明实施例提供的一种通信设备900示意性结构图，本实施例中的通信设备可以具体为前述实施例中的网络设备。图7所示的通信设备900包括处理器910，处理器910可以从存储器中调用并运行计算机程序，以实现本发明实施例中的方法。
可选地，图7所示，通信设备900还可以包括存储器920。其中，处理器910可以从存储器920中调用并运行计算机程序，以实现本发明实施例中的方法。
其中，存储器920可以是独立于处理器910的一个单独的器件，也可以集成在处理器910中。
可选地，如图7所示，通信设备900还可以包括收发器930，处理器910可以控制该收发器930与其他设备进行通信，具体地，可以向其他设备发送信息或数据，或接收其他设备发送的信息或数据。
其中，收发器930可以包括发射机和接收机。收发器930还可以进一步包括天线，天线的数量可以为一个或多个。
可选地，该通信设备900具体可为本发明实施例的终端设备、或者网络设备，并且该通信设备900可以实现本发明实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
图8是本发明实施例的芯片的示意性结构图。图8所示的芯片1000包括处理器1010，处理器1010可以从存储器中调用并运行计算机程序，以实现本发明实施例中的方法。
可选地，如图8所示，芯片1000还可以包括存储器1020。其中，处理器1010可以从存储器1020中调用并运行计算机程序，以实现本发明实施例中的方法。
其中，存储器1020可以是独立于处理器1010的一个单独的器件，也可以集成在处理器1010中。
可选地，该芯片1000还可以包括输入接口1030。其中，处理器1010可以控制该输入接口1030与其他设备或芯片进行通信，具体地，可以获取其他设备或芯片发送的信息或数据。
可选地，该芯片1000还可以包括输出接口1040。其中，处理器1010可以控制该输出接口1040与其他设备或芯片进行通信，具体地，可以向其他设备或芯片输出信息或数据。
可选地，该芯片可应用于本发明实施例中的各个方法中由终端设备实现的相应流程，为了简洁，在此不再赘述。
应理解，本发明实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。
应理解，本发明实施例的处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本发明实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM， EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，上述存储器为示例性但不是限制性说明，例如，本发明实施例中的存储器还可以是静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synch link DRAM，SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)等等。也就是说，本发明实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
图9是本申请实施例提供的一种通信系统800的示意性框图。如图9所示，该通信系统800包括终端设备810和网络设备820。这里，网络设备可以包括有源网络设备或目标网络设备。
其中，该终端设备810可以用于实现上述方法中由UE实现的相应的功能，以及该网络设备820可以用于实现上述源网络设备侧的方法、或者目标网络设备侧的方法中由网络设备实现的相应的功能，为了简洁，在此不再赘述。
本发明实施例还提供了一种计算机可读存储介质，用于存储计算机程序。
可选的，该计算机可读存储介质可应用于本发明实施例中的网络设备 或终端设备，并且该计算机程序使得计算机执行本发明实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
本发明实施例还提供了一种计算机程序产品，包括计算机程序指令。
可选的，该计算机程序产品可应用于本发明实施例中的网络设备或终端设备，并且该计算机程序指令使得计算机执行本发明实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
本发明实施例还提供了一种计算机程序。
可选的，该计算机程序可应用于本发明实施例中的网络设备或终端设备，当该计算机程序在计算机上运行时，使得计算机执行本发明实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本发明所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，)ROM、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。

Claims (29)

  1. 一种切换处理方法，所述方法包括：
    终端设备在执行第一类切换的过程中与目标网络设备随机接入成功，所述终端设备切换上行数据传输至所述目标网络设备，在满足预设条件的情况下所述终端设备执行以下处理中之一：
    释放源网络设备的连接；不触发与所述源网络设备的连接重建立；不触发与所述源网络设备的随机接入过程。
  2. 根据权利要求1所述的方法，其中，所述预设条件包括：所述终端设备与源网络设备的连接发生无线链路失败RLF；
    在满足预设条件的情况下所述终端设备执行的处理为：释放源网络设备的连接；或者，不触发与所述源网络设备的连接重建立。
  3. 根据权利要求2所述的方法，其中，所述方法还包括：
    若所述终端设备执行的处理为不触发与所述源网络设备的连接重建立，则所述终端设备保留所述源网络设备的协议栈。
  4. 根据权利要求3所述的方法，其中，所述方法还包括：
    所述终端设备接收到第一指示信息；所述第一指示信息用于指示释放所述源网络设备的连接；
    所述终端设备基于所述第一指示信息释放所述源网络设备的连接。
  5. 根据权利要求1-4任一项所述的方法，其中，释放所述源网络设备的连接的处理中，包括：释放所述源网络设备的协议栈、以及与所述源网络设备相关的密钥。
  6. 根据权利要求3所述的方法，其中，所述方法还包括；
    所述终端设备向所述目标网络设备上报与源网络设备的连接发生RLF。
  7. 根据权利要求2-6任一项所述的方法，其中，RLF的触发条件包括以下至少之一：
    在收到物理层发送的无线链路出现问题的指示后，定时器到期；
    与源网络设备之间的随机接入过程失败；
    无线链路控制RLC失败。
  8. 根据权利要求1所述的方法，其中，所述预设条件，包括：所述终 端设备与源网络设备间，满足触发随机接入的条件；
    在满足预设条件的情况下所述终端设备执行的处理为：释放源网络设备的连接；或者，不触发与源网络设备随机接入过程。
  9. 根据权利要求8所述的方法，其中，所述方法还包括：
    所述终端设备向目标网络设备上报所述终端设备的处理状况。
  10. 根据权利要求9所述的方法，其中，所述终端设备的处理状况，至少包括：终端设备触发随机接入过程的原因。
  11. 根据权利要求8或9所述的方法，其中，触发随机接入的条件包括以下至少之一：
    上行失步；调度请求SR触发的随机接入；波束失败恢复BFR；连接重建立。
  12. 根据权利要求1-11任一项所述的方法，其中，所述第一类切换，为：在切换过程中终端设备保持与源网络设备以及目标网络设备之间的协议栈的切换。
  13. 一种终端设备，包括：
    通信单元，在执行第一类切换的过程中与目标网络设备随机接入成功，切换上行数据传输至所述目标网络设备，在满足预设条件的情况下执行以下处理中之一：
    释放源网络设备的连接；不触发与所述源网络设备的连接重建立；不触发与所述源网络设备的随机接入过程。
  14. 根据权利要求13所述的终端设备，其中，所述预设条件包括：所述终端设备与源网络设备的连接发生无线链路失败RLF；
    通信单元，在满足预设条件的情况下执行的处理为：释放源网络设备的连接；或者，不触发与所述源网络设备的连接重建立。
  15. 根据权利要求14所述的终端设备，其中，所述通信单元，执行的处理为不触发与所述源网络设备的连接重建立，则保留所述源网络设备的协议栈。
  16. 根据权利要求15所述的终端设备，其中，所述通信单元，接收到第一指示信息；所述第一指示信息用于指示释放所述源网络设备的连接；基于所述第一指示信息释放所述源网络设备的连接。
  17. 根据权利要求13-16任一项所述的终端设备，其中，释放所述源网络设备的连接的处理中，包括：释放所述源网络设备的协议栈、以及与所述源网络设备相关的密钥。
  18. 根据权利要求15所述的终端设备，其中，所述通信单元，向所述目标网络设备上报与源网络设备的连接发生RLF。
  19. 根据权利要求14-18任一项所述的终端设备，其中，RLF的触发条件包括以下至少之一：
    在收到物理层发送的无线链路出现问题的指示后，定时器到期；
    与源网络设备之间的随机接入过程失败；
    无线链路控制RLC失败。
  20. 根据权利要求13所述的终端设备，其中，所述预设条件，包括：所述终端设备与源网络设备间，满足触发随机接入的条件；
    所述通信单元，在满足预设条件的情况下执行的处理为：释放源网络设备的连接；或者，不触发与源网络设备随机接入过程。
  21. 根据权利要求20所述的终端设备，其中，所述通信单元，向目标网络设备上报所述终端设备的处理状况。
  22. 根据权利要求21所述的终端设备，其中，所述终端设备的处理状况，至少包括：终端设备触发随机接入过程的原因。
  23. 根据权利要求21或22所述的终端设备，其中，触发随机接入的条件包括以下至少之一：
    上行失步；调度请求SR触发的随机接入；波束失败恢复BFR；连接重建立。
  24. 根据权利要求13-23任一项所述的终端设备，其中，所述第一类切换，为：在切换过程中终端设备保持与源网络设备以及目标网络设备之间的协议栈的切换。
  25. 一种终端设备，包括：处理器和用于存储能够在处理器上运行的计算机程序的存储器，
    其中，该存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，执行如权利要求1-12任一项所述方法的步骤。
  26. 一种芯片，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求1-12中任一项所述的方法。
  27. 一种计算机可读存储介质，所述计算机可读存储介质用于存储计算机程序，所述计算机程序使得计算机执行如权利要求1-12任一项所述方法的步骤。
  28. 一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求1-12中任一项所述的方法。
  29. 一种计算机程序，所述计算机程序使得计算机执行如权利要求1-12中任一项所述的方法。
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EP4087207A4 (en) 2023-01-04
BR112022015919A2 (pt) 2022-10-04
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MX2022009981A (es) 2022-09-12

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