WO2021068199A1 - 一种切换处理方法、网络设备 - Google Patents

一种切换处理方法、网络设备 Download PDF

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Publication number
WO2021068199A1
WO2021068199A1 PCT/CN2019/110620 CN2019110620W WO2021068199A1 WO 2021068199 A1 WO2021068199 A1 WO 2021068199A1 CN 2019110620 W CN2019110620 W CN 2019110620W WO 2021068199 A1 WO2021068199 A1 WO 2021068199A1
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WIPO (PCT)
Prior art keywords
network device
downlink data
handover
indication information
terminal device
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PCT/CN2019/110620
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English (en)
French (fr)
Inventor
尤心
付喆
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
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 PCT/CN2019/110620 priority Critical patent/WO2021068199A1/zh
Priority to CN201980099434.2A priority patent/CN114258715B/zh
Publication of WO2021068199A1 publication Critical patent/WO2021068199A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management

Definitions

  • the present invention relates to the field of information processing technology, and in particular to a switching processing method, network equipment, chip, computer readable storage medium, computer program product, and computer program.
  • the source base station after receiving the handover request feedback from the target base station, the source base station will start to forward data to the target base station and send a status report to the target base station.
  • the terminal device After the terminal device successfully accesses the target base station, it can directly communicate with the target base station. .
  • the terminal device will maintain the connection between the source base station and the target base station at the same time. Therefore, in this scenario, how to forward the downlink data becomes a problem. The problem.
  • embodiments of the present invention provide a switching processing method, a network device, a chip, a computer-readable storage medium, a computer program product, and a computer program.
  • a handover processing method includes:
  • the first network device forwards the downlink data set to the second network device;
  • the preset conditions include: the downlink transmission of the first network device does not use replication transmission.
  • a network device including:
  • a processing unit in the process of performing the first type of handover for the terminal device, determine whether the network device satisfies a preset condition
  • the communication unit forwards the downlink data set to the second network device when the network device satisfies the preset condition; the preset condition includes that the downlink transmission of the network device does not use copy transmission.
  • a network 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 above-mentioned first aspect or each of its implementation manners.
  • a chip is provided to implement the methods in the foregoing implementation manners.
  • the chip includes a processor, which is used to call and run a computer program from the memory, so that the device installed with the chip executes the method in the above-mentioned first aspect or each of its implementation manners.
  • a computer-readable storage medium for storing a computer program that enables a computer to execute the method in the above-mentioned first aspect or each of its implementation manners.
  • a computer program product including computer program instructions that cause a computer to execute the method in the first aspect or its implementation manners.
  • a computer program which when running on a computer, causes the computer to execute the method in the first aspect or its implementation manners.
  • the first network device when the first type of handover is performed, it can be determined whether the first network device transmits the downlink data packet to the second network device according to whether the first network device supports the copy transmission of the downlink transmission. In this way, it provides a kind of content for copy transmission and forwarding in the first type of handover processing, and the downlink data packet is forwarded to the second network device only when the first network device does not use the copy transmission, thereby avoiding the first network device. Redundant transmission between the device and the second network device during the first type of handover.
  • 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 provided by an embodiment of the present invention.
  • Figure 3 is a schematic diagram of a handover process
  • FIG. 4 is a schematic diagram of the composition structure of a network device provided by an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of the composition structure of a communication device provided by an embodiment of the present invention.
  • FIG. 6 is a schematic block diagram of a chip provided by an embodiment of the present application.
  • FIG. 7 is a second schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GSM Global System of Mobile Communication
  • 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 applied in the embodiment of the present application may be as shown in FIG. 1.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a UE 120 (or called a communication terminal or a terminal).
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with UEs located in the coverage area.
  • the network equipment 110 may be a network equipment (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a network equipment (NodeB, NB) in a WCDMA system, or an evolution in an LTE system Type network equipment (Evolutional Node B, eNB or eNodeB), or a wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment may be a mobile switching center, a relay station, an access point, In-vehicle devices, wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in the future evolution of the Public Land Mobile Network (PLMN), etc.
  • BTS Base Transceiver Station
  • NodeB NodeB
  • NB network equipment
  • Evolutional Node B eNodeB
  • eNodeB LTE system Type network equipment
  • CRAN Cloud Radio Access Network
  • the network equipment may be a mobile switching center, a relay station, an access point, In-
  • the communication system 100 also includes at least one UE 120 located within the coverage area of the network device 110.
  • UE as used herein includes but is not limited to connection via wired lines, such as via public switched telephone networks (PSTN), digital subscriber line (Digital Subscriber Line, DSL), digital cable, and direct cable connection; And/or another data connection/network; and/or via a wireless interface, such as for cellular networks, wireless local area networks (WLAN), digital TV networks such as DVB-H networks, satellite networks, AM-FM Broadcast transmitter; and/or another UE's device configured to receive/send communication signals; and/or Internet of Things (IoT) equipment.
  • a UE set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a “wireless terminal” or a "mobile terminal”.
  • direct terminal connection (Device to Device, D2D) communication may be performed between the UEs 120.
  • the embodiment of the present invention provides a handover processing method. As shown in FIG. 2, the method includes:
  • Step 21 When the first network device performs the first type of handover for the terminal device, it is determined whether the first network device satisfies a preset condition;
  • Step 22 When the first network device meets a preset condition, the first network device forwards the downlink data set to the second network device;
  • the preset conditions include: the downlink transmission of the first network device does not use replication transmission.
  • the first type of switching is: maintaining the switching of the protocol stack with the second network device and the first network device during the switching process.
  • the first type of switch may be an enhanced make-before-break (eMBB) switch, or it may be a dual active protocol stack (dual active protocol stack) switch.
  • eMBB enhanced make-before-break
  • dual active protocol stack dual active protocol stack
  • the network device may be a base station on the network side; the first network device may be a source base station connected to a terminal device, and the second network device may be a target base station.
  • the terminal device is a device that can simultaneously maintain the protocol stacks with the first network device and the second network device during handover.
  • the New Radio (NR, New Radio) system supports the handover process of connected terminal devices.
  • NR New Radio
  • the system When a terminal device that is using network services moves from one cell to another, or due to wireless transmission service load adjustment, activation operation and maintenance, equipment failure, etc., in order to ensure the continuity of communication and the quality of service, the system must 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 whole handover process is divided into the following three stages, which can be seen in Figure 3, including:
  • Handover preparation stage As shown in steps 0-5 in Figure 3, the second network device and the first network device perform processing according to the mobility control information provided by the access and mobility management function entity (AMF, Access and Mobility Management Function); the terminal; The device performs measurement control and reporting, the first network device makes a handover decision, and then the first network device makes a handover request, management control, and handover request confirmation to the second network device.
  • the handover confirmation message contains the handover command generated by the second network device, and the first network device is not allowed to make any modification to the handover command generated by the second network device, and directly forwards the handover command to the terminal device.
  • Handover execution stage As shown in steps 6-7 in Figure 3, the terminal device immediately executes the handover process after receiving the handover command, which may include radio access network (RAN, Radio Access) between the terminal device and the first network device.
  • RAN radio access network
  • Network handover the terminal device disconnects the first network device and synchronizes with the second network device and establishes a connection (such as performing random access, sending an RRC handover complete message to the target base station, etc.); SN state transfer; may also include the first A network device transmits new data of a user plane function entity (UPF, User Plane Function), and transmits the buffered data to the second network device.
  • UPF User Plane Function
  • Handover completion stage As shown in steps 8-12 in Figure 3, after the RAN handover is completed, the terminal device transmits user data between the second network device, and transmits user data between the second network device and the UPF; Then the second network device and the AMF send a path switch request, the UPF performs the path switch, and then the AMF informs the second network device of the end of the path switch through the first network device, the AMF sends the path switch request confirmation to the second network device, and then the second The network device notifies the first network device to release the user data.
  • Another handover scenario corresponding to this embodiment may also include the following two architectures:
  • Another architecture is to maintain the switch of the connection with the first network device and the second network device at the same time, which can be understood as an enhanced make-before-break (eMBB) switch.
  • eMBB enhanced make-before-break
  • the first network device may first determine whether the downlink transmission adopts replication transmission. Can be one of the following:
  • the first network device determines whether the downlink transmission adopts copy transmission
  • the first network device determines whether the downlink transmission adopts copy transmission according to the instruction of the second network device.
  • the first network device determines whether the downlink transmission adopts replication transmission, which may be:
  • the first network device may determine that the downlink transmission does not use copy transmission
  • the first network device When the first network device supports copy transmission, it can determine whether to use copy transmission according to the actual situation. For example, if the current network status is good, copy transmission may not be used. If the network status is poor, copy transmission may be used; or, You can refer to other communication parameters, such as communication quality parameters, channel quality parameters, etc.;
  • the first network device can determine whether the downlink transmission adopts copy transmission according to the provisions of the protocol; wherein, the protocol can stipulate in which processing flow the first network device does not use copy transmission, for example, It is stipulated that copy transmission is not used in the process of handover, and this will not be exhaustive here.
  • the aforementioned first network device determines whether the downlink transmission adopts copy transmission according to the instruction of the second network device, which may be:
  • the second network device may obtain the capability of the first network device from the core network (or from the first network device) in advance.
  • the capability may include whether the first network device supports copy transmission of downlink transmission. If not, it may not be supported. Give instructions
  • the second network device may send the instruction to the first network device to instruct the first network device not to use the copy transmission
  • the first network device can be notified to adopt replication transmission through the instruction.
  • the first network device may not forward the downlink data packet to the second network device; if the downlink transmission adopts replication transmission, That is, the preset condition is met, and at this time, the first network device forwards the downlink data packet to the second network device.
  • the downlink transmission in this embodiment may be a downlink transmission within a certain period of time, and a time window may be used to control the duration of the downlink transmission. For example, it may be the time from the beginning of the first type of handover to the end of the first type of handover. The length of the window.
  • the preset condition further includes one of the following:
  • the first network device receives the first instruction information of the second network device; wherein, the first instruction information is used to instruct the first network device to release the connection with the terminal device, or to instruct the first network device
  • the device stops data forwarding with the terminal device
  • the first network device receives the second indication information sent by the second network device; wherein the second indication information is used to instruct the first network device to release the UE context;
  • the first network device receives the third indication information sent by the core network; wherein, the third indication information carries the end identifier of the path switching;
  • the first network device receives the fourth indication information sent by the terminal device; where the fourth indication information is used to characterize that the terminal device successfully accesses the second network device.
  • the preset condition may also include one of the above.
  • the first network device receives the first indication information of the second network device; wherein, the first indication information is used to instruct the first network device to release the connection with the terminal device Or, instruct the first network device to stop data forwarding with the terminal device.
  • the second network device may send the first indication information when sending the handover request confirmation to the first network device; or, the first indication information may be carried by the handover request confirmation.
  • the first network device receives the second indication information sent by the second network device; wherein, the second indication information is used to instruct the first network device to release the UE context;
  • the second network device may send the second indication information when sending the handover request confirmation to the first network device; or, the second indication information may be carried by the handover request confirmation; or, it may be After the first network device completes the SN status transmission to the second network device, the second network device sends second indication information to the first network device; or, before or after the RAN handover is completed, the second network device sends the second network device to the first network device. The device sends the second instruction information.
  • the first network device receives the third indication information sent by the core network; wherein, the third indication information carries the end identifier of the path switching;
  • the core network sends third indication information to the first network device, and the third indication information indicates the end of the path switching of the first network device. Carry the end marker (End Marker) of path switching.
  • the first network device receives the fourth indication information sent by the terminal device; wherein, the fourth indication information is used to characterize that the terminal device successfully accesses the second network device.
  • step 8 in FIG. 3 the terminal device sends fourth indication information to the first network device to indicate that the terminal device has successfully accessed the second network device.
  • the downlink transmission does not use the preset conditions of the copy transmission, and can be used in combination with any of the foregoing four situations.
  • the downlink data set includes at least one of the following:
  • the first network device has received a part of the downlink data packets from the upper layer that has not been sent to the terminal device.
  • This part of the unsent data packets can be understood as the aforementioned downlink data to be transmitted. Packet; this part of the downlink data packet is to be forwarded by the first network device to the second network device, and then the second network device can re-send to the terminal device.
  • the first network device when the preset condition is met, the first network device has received a part of the downlink data packet from the upper layer and sent it to the terminal device, but the terminal device did not send an ACK to the first network device (that is, Confirm) feedback information, this part of the downlink data packet also needs to be forwarded by the first network device to the second network device, and then the second network device can resend it to the terminal device.
  • the first network device when the downlink transmission of the first network device does not use copy transmission, and the first network device receives the first indication information of the second network device, it can be determined that the downlink data packet contains the received first Indicate the previously received downlink data packet to be transmitted from the upper layer, and/or the downlink data packet that has been transmitted to the terminal device and has not received correct feedback.
  • the use of other preset conditions will not be exhaustive here.
  • the downlink data set includes:
  • the downlink data packet may be from the time the handover starts (that is, when the first network device sends a handover request to the second network device, or when the first network device makes a handover decision), until the path switch is received Up to the end of the mark, all the downlink data packets within this period of time.
  • the downlink data packet may include: the downlink data packet to be transmitted received from the upper layer before the end flag of the path switch is received; and/or, the path switch is received Before the end mark of, the downlink data packet that has been transmitted to the terminal equipment and has not received the correct feedback.
  • the completion of the aforementioned path switching may be the completion of the uplink path switching, or alternatively, the completion of the uplink and downlink path switching.
  • the downlink transmission of the first network device does not use copy transmission, and the first network device receives the second instruction information sent by the second network device, and the second instruction information is used to indicate the first network device.
  • the network device releases the UE context; it can be determined that the downlink data packet contains the downlink data packet before the end flag of the path switching is received.
  • the downlink transmission of the first network device does not use copy transmission, and the first network device receives the third indication information sent by the core network; wherein, the third indication information carries the end identifier of the path switch ; Then the first network device may determine that the downlink data packet contains: the downlink data packet to be transmitted received from the upper layer before receiving the end flag of path switching; and/or, before the end flag of path switching is received, it has been transmitted Downlink data packets that are sent to the terminal equipment and have not received correct feedback.
  • the downlink data set further includes:
  • the downlink data status includes the superframe number HFN of at least one downlink data packet and/or the sequence number SN of at least one downlink data packet.
  • the downlink data set can only include the downlink data state, that is, even if the downlink data packet is not forwarded, the first network device can also forward the downlink data state to the second network device separately. It can be the SN and/or HFN of at least one downlink data packet.
  • the downlink data set can include: the downlink data packet to be transmitted received from the upper layer, and the corresponding SN and/or HFN;
  • the downlink data set may include: the downlink data packet before the end flag of the path switching is received, and the corresponding SN and/or HFN.
  • the downlink data set may include: the downlink data packet to be transmitted received from the upper layer before receiving the end flag of the path switch, and the corresponding SN and/or HFN; And/or, before receiving the end sign of the path switch, the downlink data packet that has been transmitted to the terminal device and has not received the correct feedback, and the corresponding SN and/or HFN.
  • the terminal device when the terminal device performs the first type of handover, it can be determined whether the first network device transmits the downlink data packet to the second network device according to whether the first network device supports the copy transmission of the downlink transmission. In this way, it provides a kind of content for copy transmission and forwarding in the first type of handover processing, and the downlink data packet is forwarded to the second network device only when the first network device does not use the copy transmission, thereby avoiding the first network device. Redundant transmission between the device and the second network device during the first type of handover.
  • the embodiment of the present invention provides a network device, as shown in FIG. 4, including:
  • the processing unit 41 is configured to determine whether the network device satisfies a preset condition during the process of performing the first type of handover for the terminal device;
  • the communication unit 42 forwards the downlink data set to the second network device when the network device meets a preset condition; the preset condition includes that the downlink transmission of the network device does not use copy transmission.
  • the first type of handover is: maintaining the handover with the second network device and the protocol stack between the network device during the handover process.
  • the first type of switch may be an enhanced make-before-break (eMBB) switch, or it may be a dual active protocol stack (dual active protocol stack) switch.
  • eMBB enhanced make-before-break
  • dual active protocol stack dual active protocol stack
  • the network device may be a base station on the network side; the network device may be a source base station connected to a terminal device, and the second network device may be a target base station.
  • the terminal device is a device that can maintain the protocol stack with the network device and the second network device at the same time during handover.
  • the processing unit 41 may first determine whether the downlink transmission adopts replication transmission. Can be one of the following:
  • the processing unit 41 determines whether the downlink transmission adopts copy transmission
  • the processing unit 41 determines whether the downlink transmission adopts copy transmission according to the instruction of the second network device.
  • the preset condition further includes one of the following:
  • the first indication information of the second network device is received; wherein the first indication information is used to instruct the network device to release the connection with the terminal device, or to instruct the network device to stop data forwarding with the terminal device ;
  • the downlink transmission does not use the preset conditions of the copy transmission, and can be used in combination with any of the foregoing four situations.
  • the downlink data set includes at least one of the following:
  • the network device has received some of the downlink data packets from the upper layer and sent to the terminal device, but the terminal device has not sent ACK (that is, confirmation) feedback information to the network device
  • ACK that is, confirmation
  • This part of the downlink data packet also needs to be forwarded by the network device to the second network device, and then the second network device can re-send to the terminal device.
  • the downlink data set includes:
  • the downlink data packet may be from the beginning of the handover (that is, when the network device sends a handover request to the second network device, or when the network device makes a handover decision, where the handover decision may include the network device according to
  • the evaluation and decision-making process of the measurement results reported by the terminal equipment may include the process of selecting the target cell from the measurement results of multiple neighboring cells reported by the terminal equipment, etc.), until the end identifier of the path switching is received. All downlink data packets within a period of time.
  • the downlink data packet may include: the downlink data packet to be transmitted received from the upper layer before the end flag of the path switch is received; and/or, the path switch is received Before the end mark of, the downlink data packet that has been transmitted to the terminal equipment and has not received the correct feedback.
  • the completion of the aforementioned path switching may be the completion of the uplink path switching, or alternatively, the completion of the uplink and downlink path switching.
  • the downlink data set further includes:
  • the downlink data status includes the superframe number HFN of at least one downlink data packet and/or the sequence number SN of at least one downlink data packet.
  • the downlink data set can only include the downlink data state, that is, even if the downlink data packet is not forwarded, the network device can also forward the downlink data state to the second network device alone, and the state can be SN and/or HFN of the downlink data packet.
  • the downlink data set can include: the downlink data packet to be transmitted received from the upper layer, and the corresponding SN and/or HFN;
  • the downlink data set may include: the downlink data packet before the end flag of the path switching is received, and the corresponding SN and/or HFN.
  • the downlink data set may include: the downlink data packet to be transmitted received from the upper layer before receiving the end flag of the path switch, and the corresponding SN and/or HFN; and /Or, before receiving the end sign of the path switch, the downlink data packet that has been transmitted to the terminal device and has not received the correct feedback, and the corresponding SN and/or HFN.
  • the terminal device when the terminal device performs the first type of handover, it can be determined whether the network device transmits the downlink data packet to the second network device according to whether the network device supports the copy transmission of the downlink transmission. In this way, it provides a kind of content for copy transmission and forwarding in the first type of handover process, and the downlink data packet is forwarded to the second network device only when the network device does not use the copy transmission, thereby avoiding the network device and the second network device. Redundant transmission of network equipment during the first type of handover.
  • FIG. 5 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 embodiment.
  • the communication device 900 shown in FIG. 5 includes a processor 910, and the processor 910 can call and run a computer program from the 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 can 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 the device.
  • the transceiver 930 may include a transmitter and a receiver.
  • the transceiver 930 may further include an antenna, and the number of antennas may be one or more.
  • the communication device 900 may specifically be a network device in an embodiment of the present invention, and the communication device 900 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present invention. For brevity, details are not repeated here. .
  • the communication device 900 may specifically be a terminal device or a network device in an 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 of the embodiment of the present invention. It's concise, so I won't repeat it here.
  • Fig. 6 is a schematic structural diagram of a chip according to an embodiment of the present invention.
  • the chip 1000 shown in FIG. 6 includes a processor 1010, and the processor 1010 can call and run a computer program from the memory to implement the method in the embodiment of the present invention.
  • the chip 1000 may further include a memory 1020.
  • the processor 1010 can 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 network device in the embodiment of the present invention, and the chip can implement the corresponding process implemented by the terminal device in each method of the embodiment of the present invention.
  • the chip can be applied to the network device in the embodiment of the present invention, and the chip can implement the corresponding process implemented by the terminal device in each method of the embodiment of the present invention.
  • the chip mentioned in the embodiment 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, etc.
  • the processor in the embodiment of the present invention may be an integrated circuit chip with signal processing capability.
  • the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the above-mentioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC application specific integrated circuit
  • FPGA Field Programmable Gate Array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention can be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in combination with the embodiments of the present invention may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • 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 can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • DDR SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • Enhanced SDRAM, ESDRAM Enhanced Synchronous Dynamic Random Access Memory
  • Synchronous Link Dynamic Random Access Memory Synchronous Link Dynamic Random Access Memory
  • DR RAM Direct Rambus RAM
  • the memory in the embodiment of the present invention may also be static random access memory (static RAM, SRAM), 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.
  • static random access memory static random access memory
  • DRAM dynamic random access memory
  • SDRAM Synchronous dynamic random access memory
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • synchronous connection Dynamic random access memory switch link DRAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • FIG. 7 is a schematic block diagram of a communication system 800 provided by an embodiment of the present application. As shown in FIG. 7, the communication system 800 includes a terminal device 810 and a network device 820.
  • the terminal device 810 may be used to implement the corresponding functions implemented by the UE in the foregoing method
  • the network device 820 may be used to implement the corresponding functions implemented by the network device in the foregoing method.
  • details are not described herein again.
  • the embodiment of the present invention also provides a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium can be applied to the network device or the 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, for the sake of brevity , I won’t repeat it here.
  • the embodiment of the present invention also provides a computer program product, including computer program instructions.
  • the computer program product can be applied to the network device or the terminal device in the embodiment of the present invention, and the computer program instructions cause the computer to execute the corresponding process 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 process 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 can be applied to the network device or the terminal device in the embodiment of the present invention.
  • the computer program runs on the computer, the computer is caused to execute the corresponding process implemented by the network device in each method of the embodiment of the present invention. , For the sake of brevity, I won’t repeat it here.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present invention essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present invention.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disks or optical disks 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、网络设备、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：第一网络设备执行针对终端设备的第一类切换的过程中，确定所述第一网络设备是否满足预设条件；在所述第一网络设备满足预设条件的情况下，所述第一网络设备向第二网络设备转发下行数据集合；所述预设条件，包括：第一网络设备的下行传输不采用复制传输。

Description

一种切换处理方法、网络设备 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、网络设备、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，源基站在收到目标基站的切换请求反馈后就会开始转发数据给目标基站并且发送状态报告给目标基站，终端设备接入目标基站成功后，就直接与目标基站进行通信即可。但是，对于双激活协议栈(dual active protocol stack)的切换而言，终端设备会同时保持源基站和目标基站的连接，因此，这种场景下的切换中，如何进行下行数据转发则成为需要解决的问题。
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、网络设备、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，提供了一种切换处理方法，所述方法包括：
第一网络设备执行针对终端设备的第一类切换的过程中，确定所述第一网络设备是否满足预设条件；
在所述第一网络设备满足预设条件的情况下，所述第一网络设备向第二网络设备转发下行数据集合；
所述预设条件，包括：第一网络设备的下行传输不采用复制传输。
第二方面，提供了一种网络设备，包括：
处理单元，执行针对终端设备的第一类切换的过程中，，确定所述网络设备是否满足预设条件；
通信单元，在所述网络设备满足预设条件的情况下，则向第二网络设备转发下行数据集合；所述预设条件，包括：网络设备的下行传输不采用复制传输。
第三方面，提供了一种网络设备，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，在进行第一类切换时，可以根据第一网络设备是否支持下行传输的复制传输，来确定第一网络设备是否向第二网络设备传输下行数据包。如此，就提供了一种在第一类切换处理中的复制传输转发的内容，并且在第一网络设备不采用复制传输的时候才会向第二网络设备转发下行数据包，从而避免第一网络设备与第二网络设备在第一类切换过程中的冗余传输。
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网络设备组成结构示意图；
图5为本发明实施例提供的一种通信设备组成结构示意图；
图6是本申请实施例提供的一种芯片的示意性框图；
图7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。
本发明实施例提供了一种切换处理方法，如图2所示，所述方法包括：
步骤21：第一网络设备执行针对终端设备的第一类切换的过程中，确定所述第一网络设备是否满足预设条件；
步骤22：在所述第一网络设备满足预设条件的情况下，所述第一网络设备向第二网络设备转发下行数据集合；
所述预设条件，包括：第一网络设备的下行传输不采用复制传输。
其中，所述第一类切换为：在切换过程中保持与第二网络设备以及第一网络设备之间的协议栈的切换。
具体的，所述第一类切换可以为增强的先建链后断链(eMBB，Enhanced make-before-break)的切换，或者，可以为是双激活协议栈(dual active protocol stack)的切换。可能还存在其他的名称，只要能够在切换时保持前述与第二网络设备以及第一网络设备之间的连接的切换过程均在本实施例的保护范围内。
本实施例中，网络设备可以为网络侧的基站；第一网络设备可以为终端设备连接的源基站，第二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第一网络设备和第二网络设备的协议栈的设备。
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3中步骤0-5所示，第二网络设备以及第一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，第一网络设备进行切换决策，然后由第一网络设备向第二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第二网络设备生成的切换命令，并且不允许第一网络设备对第二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3中步骤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第一网络设备之间进行无线接入网(RAN，Radio Access Network)切换，终端设备断开第一网络设备并与第二网络设备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；还可以包括有第一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第二网络设备。
切换完成阶段：如图3中步骤8-12所示，RAN切换完成之后，终端设 备通过第二网络设备之间进行用户数据的传输，并且第二网络设备与UPF之间进行用户数据的传输；然后第二网络设备与AMF发送路径切换请求，由UPF执行路径切换，然后由AMF通过第一网络设备通知第二网络设备路径切换结束，AMF向第二网络设备发送路径切换请求确认，然后第二网络设备通知第一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，先把第二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)，最后再把第一网络设备释放掉，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第一网络设备和第二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，继续保持和第一网络设备的连接同时向第二网络设备发起随机接入，直到终端设备与第二网络设备接入完成才释放第一网络设备的连接。
进一步地，还增加有以下限定：1、在0ms切换中，不需要支持同时上行链路(UL，UpLink)物理上行共享信道(PUSCH，Physical Uplink Shared Channel)传输；2、在接收到第二网络设备(也就是目标基站)发送的第一个UL授权之后，UL PUSCH由第一网络设备切换至第二网络设备。
在一种示例中，第一网络设备可以首先确定下行传输是否采用复制传输。可以为以下之一：
第一网络设备确定下行传输是否采用复制传输；
第一网络设备根据第二网络设备的指示，确定下行传输是否采用复制传输。
具体来说，由第一网络设备确定下行传输是否采用复制传输，可以为：
第一网络设备在不支持下行传输采用复制传输的情况下，可以确定下行传输不采用复制传输；
第一网络设备在支持复制传输的情况下，可以根据实际情况来确定是否采用复制传输，比如当前网络状态较好，可以不采用复制传输，如果网络状态较差，可以采用复制传输；又或者，可以参考其他的通信参数，比如通信质量参数、信道质量参数等等；
再或者，第一网络设备在支持复制传输的情况下，可以根据协议规定来确定下行传输是否采用复制传输；其中，协议可以规定第一网络设备在哪种处理流程中不采用复制传输，比如可以规定在切换的处理流程中不采用复制传输，这里不再进行穷举。
前述第一网络设备根据第二网络设备的指示，确定下行传输是否采用复制传输，可以为：
第二网络设备可以预先从核心网(或者从第一网络设备)获取到第一网络设备的能力，该能力中可以包含有第一网络设备是否支持下行传输的 复制传输，如果不支持，可以不进行指示；
如果支持下行传输的复制传输，在第二网络设备确定不需要第一网络设备采用复制传输的时候，第二网络设备可以向第一网络设备发送该指示，以指示第一网络设备不采用复制传输，反之，如果需要第一网络设备的下行传输采用复制传输，可以通过该指示通知第一网络设备采用复制传输。
进一步地，如果第一网络设备下行传输采用复制传输，那么也就是不满足所述预设条件，此时第一网络设备可以不向第二网络设备转发下行数据包；如果下行传输采用复制传输，也就是满足预设条件，此时第一网络设备向第二网络设备转发下行数据包。
本实施例中所述下行传输可以为一定时间段内的下行传输，可以采用时间窗来控制下行传输的时长，比如，可以为从开始执行第一类切换开始至第一类切换结束作为该时间窗的长度。
在前述示例的基础上，另一示例中，所述预设条件，还包括以下之一：
所述第一网络设备接收到所述第二网络设备的第一指示信息；其中，所述第一指示信息用于指示第一网络设备释放与终端设备的连接，或者，指示所述第一网络设备停止与所述终端设备进行数据转发；
所述第一网络设备接收到第二网络设备发送的第二指示信息；其中，所述第二指示信息用于指示所述第一网络设备释放UE上下文；
所述第一网络设备接收到核心网发来的第三指示信息；其中，所述第三指示信息携带路径切换的结束标识；
所述第一网络设备接收终端设备发来的第四指示信息；其中，所述第四指示信息用于表征终端设备成功接入第二网络设备。
也就是说，在满足下行传输不采用复制传输的基础上，预设条件还可以包含以上之一。
具体的，第一种情况中，所述第一网络设备接收到所述第二网络设备的第一指示信息；其中，所述第一指示信息用于指示第一网络设备释放与终端设备的连接，或者，指示所述第一网络设备停止与所述终端设备进行数据转发。
这种情况下，第二网络设备可以在向第一网络设备发送切换请求确认的时候，发送所述第一指示信息；又或者，所述第一指示信息可以由切换请求确认携带。
第二种情况中，所述第一网络设备接收到第二网络设备发送的第二指示信息；其中，所述第二指示信息用于指示所述第一网络设备释放UE上下文；
可以为，第二网络设备可以在向第一网络设备发送切换请求确认的时候，发送所述第二指示信息；又或者，所述第二指示信息可以由切换请求确认携带；再或者，可以在第一网络设备向第二网络设备完成SN状态传输之后，第二网络设备向第一网络设备发送第二指示信息；再或者，可以在 RAN切换完成之前或者之后，第二网络设备向第一网络设备发送第二指示信息。
第三种情况中，所述第一网络设备接收到核心网发来的第三指示信息；其中，所述第三指示信息携带路径切换的结束标识；
可以为，第二网络设备向核心网(AMF)发送路径切换请求之后，由核心网向第一网络设备发送第三指示信息，通过该第三指示信息指示第一网络设备路径切换结束，其中可以携带路径切换的结束标识(End Marker)。
第四种情况中，所述第一网络设备接收终端设备发来的第四指示信息；其中，所述第四指示信息用于表征终端设备成功接入第二网络设备。
可以为，图3中步骤8完成之后，终端设备向第一网络设备发送第四指示信息，以指示终端设备已经成功接入第二网络设备。
需要理解的是，下行传输不采用复制传输的预设条件，可以与前述四种情况中任意一种结合使用。
基于前述多种示例，再一种示例中，
所述下行数据集合，包括以下至少之一：
从上层收到的待传输的下行数据包；
已传给终端设备、且未收到正确反馈的下行数据包。
可以理解为在满足预设条件的时候，第一网络设备已经接收到上层传来的下行数据包中存在一部分未向终端设备发送，这部分未发送的数据包可以理解为前述待传输的下行数据包；这部分下行数据包要由第一网络设备转发给第二网络设备，进而可以由第二网络设备重新向终端设备进行发送。
和/或，在满足预设条件的时候，第一网络设备已经接收到上层传来的下行数据包中还存在一部分向终端设备发送，但是终端设备并未向第一网络设备发送ACK(也就是确认)反馈信息，这部分下行数据包也需要由第一网络设备转发给第二网络设备，进而可以由第二网络设备重新向终端设备进行发送。
举例来说，在第一网络设备的下行传输不采用复制传输、且第一网络设备接收到所述第二网络设备的第一指示信息的时候，可以确定下行数据包中包含有接收到第一指示之前的从上层收到的待传输的下行数据包，和/或，已传给终端设备、且未收到正确反馈的下行数据包。关于其他预设条件的使用这里不再进行穷举。
还有一种情况，若路径切换完成，则所述下行数据集合中，包括：
接收到路径切换的结束标志之前的下行数据包。
此情况中，所述下行数据包可以为从切换开始的时候(也就是第一网络设备向第二网络设备发送切换请求时、或者第一网络设备进行切换决策的时候)，直到接收到路径切换的结束标识为止，这段时长内全部的下行数据包。
或者，此情况中，可以为在路径切换完成的时候，下行数据包可以包括：接收到路径切换的结束标志之前，从上层收到的待传输的下行数据包；和/或，接收到路径切换的结束标志之前，已传给终端设备、且未收到正确反馈的下行数据包。
前述路径切换完成可以为上行路径切换完成，又或者，可以为上下行路径切换完成。
举例来说，在第一网络设备的下行传输不采用复制传输、且所述第一网络设备接收到第二网络设备发送的第二指示信息，所述第二指示信息用于指示所述第一网络设备释放UE上下文；可以确定下行数据包中包含有接收到路径切换的结束标志之前的下行数据包。
再举例来说，在第一网络设备的下行传输不采用复制传输、所述第一网络设备接收到核心网发来的第三指示信息；其中，所述第三指示信息携带路径切换的结束标识；那么第一网络设备可以确定下行数据包中包含：接收到路径切换的结束标志之前，从上层收到的待传输的下行数据包；和/或，接收到路径切换的结束标志之前，已传给终端设备、且未收到正确反馈的下行数据包。
再一种情况，所述下行数据集合中，还包括：
下行数据状态；其中，所述下行数据状态包括至少一个下行数据包的超帧号HFN和/或至少一个下行数据包的序列号SN。
本情况中，需要指出的是，下行数据集合中可以仅包含下行数据状态，也就是说，即便没有转发下行数据包，第一网络设备也可以单独向第二网络设备转发下行数据状态，该状态可以为至少一个下行数据包的SN和/或HFN。
进一步地，本情况还可以与第一种情况结合，比如，下行数据集合中可以包括：从上层收到的待传输的下行数据包，及其对应的SN和/或HFN；
已传给终端设备、且未收到正确反馈的下行数据包，及其对应的SN和/或HFN。
另外，本情况还可以与第二种情况结合，比如，下行数据集合中可以包括：接收到路径切换的结束标志之前的下行数据包，及其对应的SN和/或HFN。
本情况与前述两种情况结合，比如，下行数据集合中，可以包括：接收到路径切换的结束标志之前，从上层收到的待传输的下行数据包，及其对应的SN和/或HFN；和/或，接收到路径切换的结束标志之前，已传给终端设备、且未收到正确反馈的下行数据包，及其对应的SN和/或HFN。
可见，通过采用上述方案，在终端设备进行第一类切换时，可以根据第一网络设备是否支持下行传输的复制传输，来确定第一网络设备是否向第二网络设备传输下行数据包。如此，就提供了一种在第一类切换处理中的复制传输转发的内容，并且在第一网络设备不采用复制传输的时候才会 向第二网络设备转发下行数据包，从而避免第一网络设备与第二网络设备在第一类切换过程中的冗余传输。
本发明实施例提供了一种网络设备，如图4所示，包括：
处理单元41，执行针对终端设备的第一类切换的过程中，确定所述网络设备是否满足预设条件；
通信单元42，在所述网络设备满足预设条件的情况下，向第二网络设备转发下行数据集合；所述预设条件，包括：所述网络设备的下行传输不采用复制传输。
其中，所述第一类切换为：在切换过程中保持与第二网络设备以及网络设备之间的协议栈的切换。
具体的，所述第一类切换可以为增强的先建链后断链(eMBB，Enhanced make-before-break)的切换，或者，可以为是双激活协议栈(dual active protocol stack)的切换。可能还存在其他的名称，只要能够在切换时保持前述与第二网络设备以及网络设备之间的连接的切换过程均在本实施例的保护范围内。
本实施例中，网络设备可以为网络侧的基站；网络设备可以为终端设备连接的源基站，第二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网络设备和第二网络设备的协议栈的设备。
在一种示例中，处理单元41可以首先确定下行传输是否采用复制传输。可以为以下之一：
处理单元41确定下行传输是否采用复制传输；
处理单元41根据第二网络设备的指示，确定下行传输是否采用复制传输。
在前述示例的基础上，另一示例中，所述预设条件，还包括以下之一：
接收到所述第二网络设备的第一指示信息；其中，所述第一指示信息用于指示网络设备释放与终端设备的连接，或者，指示所述网络设备停止与所述终端设备进行数据转发；
接收到第二网络设备发送的第二指示信息；其中，所述第二指示信息用于指示所述网络设备释放UE上下文；
接收到核心网发来的第三指示信息；其中，所述第三指示信息携带路径切换的结束标识；
接收终端设备发来的第四指示信息；其中，所述第四指示信息用于表征终端设备成功接入第二网络设备。
需要理解的是，下行传输不采用复制传输的预设条件，可以与前述四种情况中任意一种结合使用。
基于前述多种示例，再一种示例中，
所述下行数据集合，包括以下至少之一：
从上层收到的待传输的下行数据包；
已传给终端设备、且未收到正确反馈的下行数据包。
可以理解为在满足预设条件的时候，网络设备已经接收到上层传来的下行数据包中存在一部分未向终端设备发送，这部分未发送的数据包可以理解为前述待传输的下行数据包；这部分下行数据包要由网络设备转发给第二网络设备，进而可以由第二网络设备重新向终端设备进行发送。
和/或，在满足预设条件的时候，网络设备已经接收到上层传来的下行数据包中还存在一部分向终端设备发送，但是终端设备并未向网络设备发送ACK(也就是确认)反馈信息，这部分下行数据包也需要由网络设备转发给第二网络设备，进而可以由第二网络设备重新向终端设备进行发送。
还有一种情况，若路径切换完成，则所述下行数据集合中，包括：
接收到路径切换的结束标志之前的下行数据包。
此情况中，所述下行数据包可以为从切换开始的时候(也就是网络设备向第二网络设备发送切换请求时、或者网络设备进行切换决策的时候，其中，切换决策可以包括有网络设备根据终端设备上报的测量结果进行评估以及决策的过程，比如，可以包括从终端设备上报的多个相邻小区的测量结果中选取目标小区的处理等)，直到接收到路径切换的结束标识为止，这段时长内全部的下行数据包。
或者，此情况中，可以为在路径切换完成的时候，下行数据包可以包括：接收到路径切换的结束标志之前，从上层收到的待传输的下行数据包；和/或，接收到路径切换的结束标志之前，已传给终端设备、且未收到正确反馈的下行数据包。
前述路径切换完成可以为上行路径切换完成，又或者，可以为上下行路径切换完成。
再一种情况，所述下行数据集合中，还包括：
下行数据状态；其中，所述下行数据状态包括至少一个下行数据包的超帧号HFN和/或至少一个下行数据包的序列号SN。
本情况中，需要指出的是，下行数据集合中可以仅包含下行数据状态，也就是说，即便没有转发下行数据包，网络设备也可以单独向第二网络设备转发下行数据状态，该状态可以为下行数据包的SN和/或HFN。
进一步地，本情况还可以与第一种情况结合，比如，下行数据集合中可以包括：从上层收到的待传输的下行数据包，及其对应的SN和/或HFN；
已传给终端设备、且未收到正确反馈的下行数据包，及其对应的SN和/或HFN。
另外，本情况还可以与第二种情况结合，比如，下行数据集合中可以包括：接收到路径切换的结束标志之前的下行数据包，及其对应的SN和/或HFN。
本情况与前述两种情况结合，比如，下行数据集合中可以包括：接收 到路径切换的结束标志之前，从上层收到的待传输的下行数据包，及其对应的SN和/或HFN；和/或，接收到路径切换的结束标志之前，已传给终端设备、且未收到正确反馈的下行数据包，及其对应的SN和/或HFN。
可见，通过采用上述方案，在终端设备进行第一类切换时，可以根据网络设备是否支持下行传输的复制传输，来确定网络设备是否向第二网络设备传输下行数据包。如此，就提供了一种在第一类切换处理中的复制传输转发的内容，并且在网络设备不采用复制传输的时候才会向第二网络设备转发下行数据包，从而避免网络设备与第二网络设备在第一类切换过程中的冗余传输。
图5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5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5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5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网络设备实现的相应流程，为了简洁，在此不再赘述。
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6是本发明实施例的芯片的示意性结构图。图6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6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网络设备，并且该芯片可以实现本发明实施例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7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7所示，该通信系统800包括终端设备810和网络设备820。
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 (19)

  1. 一种切换处理方法，所述方法包括：
    第一网络设备执行针对终端设备的第一类切换的过程中，确定所述第一网络设备是否满足预设条件；
    在所述第一网络设备满足预设条件的情况下，所述第一网络设备向第二网络设备转发下行数据集合；
    所述预设条件，包括：第一网络设备的下行传输不采用复制传输。
  2. 根据权利要求1所述的方法，其中，所述下行数据集合，包括以下至少之一：
    从上层收到的待传输的下行数据包；
    已传给终端设备、且未收到正确反馈的下行数据包。
  3. 根据权利要求1或2所述的方法，其中，若路径切换完成，则所述下行数据集合中，包括：
    接收到路径切换的结束标志之前的下行数据包。
  4. 根据权利要求1-3任一项所述的方法，其中，所述下行数据集合中，包括：
    下行数据状态；其中，所述下行数据状态包括至少一个下行数据包的超帧号HFN和/或至少一个下行数据包的序列号SN。
  5. 根据权利要求1-4任一项所述的方法，其中，所述预设条件，还包括以下之一：
    所述第一网络设备接收到所述第二网络设备的第一指示信息；其中，所述第一指示信息用于指示第一网络设备释放与终端设备的连接，或者，指示所述第一网络设备停止与所述终端设备进行数据转发；
    所述第一网络设备接收到第二网络设备发送的第二指示信息；其中，所述第二指示信息用于指示所述第一网络设备释放UE上下文；
    所述第一网络设备接收到核心网发来的第三指示信息；其中，所述第三指示信息携带路径切换的结束标识；
    所述第一网络设备接收终端设备发来的第四指示信息；其中，所述第四指示信息用于表征终端设备成功接入第二网络设备。
  6. 根据权利要求1所述的方法，其中，所述方法还包括以下之一：
    第一网络设备确定下行传输是否采用复制传输；
    第一网络设备根据第二网络设备的指示，确定下行传输是否采用复制传输。
  7. 根据权利要求1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第一网络设备以及第二网络设备之间的协议栈的切换。
  8. 一种网络设备，包括：
    处理单元，执行针对终端设备的第一类切换的过程中，确定所述网络设备是否满足预设条件；
    通信单元，在所述网络设备满足预设条件的情况下，向第二网络设备转发下行数据集合；所述预设条件，包括：所述网络设备的下行传输不采用复制传输。
  9. 根据权利要求8所述的网络设备，其中，所述下行数据集合，包括以下至少之一：
    从上层收到的待传输的下行数据包；
    已传给终端设备、且未收到正确反馈的下行数据包。
  10. 根据权利要求8或9所述的网络设备，其中，若路径切换完成，则所述下行数据集合中，包括：
    接收到路径切换的结束标志之前的下行数据包。
  11. 根据权利要求8-10任一项所述的网络设备，其中，所述下行数据集合中，包括：
    下行数据状态；其中，所述下行数据状态包括至少一个下行数据包的超帧号HFN和/或至少一个下行数据包的序列号SN。
  12. 根据权利要求8-11任一项所述的网络设备，其中，所述预设条件，还包括以下之一：
    接收到所述第二网络设备的第一指示信息；其中，所述第一指示信息用于指示网络设备释放与终端设备的连接，或者，指示所述网络设备停止与所述终端设备进行数据转发；
    接收到第二网络设备发送的第二指示信息；其中，所述第二指示信息用于指示所述网络设备释放UE上下文；
    接收到核心网发来的第三指示信息；其中，所述第三指示信息携带路径切换的结束标识；
    接收终端设备发来的第四指示信息；其中，所述第四指示信息用于表征终端设备成功接入第二网络设备。
  13. 根据权利要求8所述的网络设备，其中，所述处理单元，执行以下之一：
    确定下行传输是否采用复制传输；
    根据第二网络设备的指示，确定下行传输是否采用复制传输。
  14. 根据权利要求8所述的网络设备，其中，所述第一类切换，为：在切换过程中终端设备保持与网络设备以及第二网络设备之间的协议栈的切换。
  15. 一种网络设备，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1-7任一项所述方法的步骤。
  16. 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1-7中任一项所述的方法。
  17. 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1-7任一项所述方法的步骤。
  18. 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1-7中任一项所述的方法。
  19. 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1-7中任一项所述的方法。
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