WO2021051384A1 - 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
WO2021051384A1
WO2021051384A1 PCT/CN2019/106970 CN2019106970W WO2021051384A1 WO 2021051384 A1 WO2021051384 A1 WO 2021051384A1 CN 2019106970 W CN2019106970 W CN 2019106970W WO 2021051384 A1 WO2021051384 A1 WO 2021051384A1
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WIPO (PCT)
Prior art keywords
network device
uplink
terminal device
downlink data
data packet
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PCT/CN2019/106970
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English (en)
French (fr)
Inventor
尤心
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Oppo广东移动通信有限公司
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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/CN2019/106970 priority Critical patent/WO2021051384A1/zh
Priority to CN201980095365.8A priority patent/CN113678504A/zh
Publication of WO2021051384A1 publication Critical patent/WO2021051384A1/zh

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    • 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

Definitions

  • the present invention relates to the field of communication 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 data such as status reports? And how to submit upstream data to the upper level has become a problem that needs to be resolved.
  • 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 When the first network device performs the first type of handover for the terminal device, if the first preset condition is met, the first network device forwards the uplink reception status report of the terminal device to the second network device, And triggering the first network device to switch from an uplink anchor point to a non-uplink anchor point; wherein the uplink anchor point is used to deliver uplink data to the upper layer.
  • a handover processing method includes:
  • the second network device When the second network device performs the first type of handover for the terminal device, receiving the uplink reception status report of the terminal device forwarded by the first network device, and triggering the second network device to convert to an uplink anchor;
  • the uplink anchor point is used to deliver uplink data to the upper layer.
  • a network device including:
  • the first processing unit in the process of performing the first type of handover for the terminal device, if the first preset condition is met, forward the uplink reception status report of the terminal device to the second network device through the first communication unit, And triggering the conversion of the first network device from an uplink anchor point to a non-uplink anchor point; wherein the uplink anchor point is used to deliver uplink data to the upper layer;
  • the first communication unit is configured to forward the uplink reception status report of the terminal device to the second network device.
  • a network device including:
  • the second processing unit receives the uplink reception status report of the terminal device forwarded by the first network device through the second communication unit during the process of performing the first type of handover for the terminal device, and triggers the second network device to switch to Uplink anchor point;
  • the second communication unit receives the uplink reception status report of the terminal device forwarded by the first network device.
  • 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, and execute the method in the first aspect, the second aspect, or each implementation manner thereof.
  • a chip is provided for implementing the methods in the foregoing implementation manners.
  • the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the method in the first aspect, the second aspect, or each implementation manner thereof.
  • a computer-readable storage medium for storing a computer program that enables a computer to execute the method in the first aspect, the second aspect, or each implementation manner thereof.
  • a computer program product including computer program instructions that cause a computer to execute the methods in the first aspect, the second aspect, or each implementation manner thereof.
  • a computer program which when running on a computer, causes the computer to execute the methods in the first aspect, the second aspect, or each of the implementations thereof.
  • the first network device can forward the uplink reception status report to the second network device, and trigger the conversion of the uplink anchor point of the first network device or the second network device, And through the conversion of the uplink anchor point to control which network device to submit the uplink data. Therefore, the problem of the data forwarding of the first network device and the switching of the uplink anchor point in the first type of handover is solved, and the problem of the second data forwarding and status report update of the first network device after the handover is completed is also solved.
  • 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 flow chart 1 of a handover processing method provided by an embodiment of the present invention.
  • FIG. 3 is a second schematic diagram of a flow of a handover processing method provided by an embodiment of the present invention.
  • Figure 4 is a schematic diagram of a handover process
  • FIG. 5 is a third schematic flowchart of a handover processing method provided by an embodiment of the present invention.
  • FIG. 6 is a fourth schematic flowchart of a handover processing method provided by an embodiment of the present invention.
  • FIG. 7 is a schematic diagram 1 of the composition structure of a network device provided by an embodiment of the present invention.
  • FIG. 8 is a second schematic diagram of the composition structure of a network device provided by an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of the composition structure of a communication device provided by an embodiment of the present invention.
  • FIG. 10 is a schematic block diagram of a chip provided by an embodiment of the present application.
  • FIG. 11 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
  • 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 terminal device 120 (or called a communication terminal or terminal).
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices 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 terminal device 120 located within the coverage area of the network device 110.
  • the "terminal equipment” used here includes but is not limited to connection via wired lines, such as via Public Switched Telephone Networks (PSTN), 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 terminal device that is set to receive/send communication signals; and/or Internet of Things (IoT) equipment.
  • a terminal device 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 terminal devices 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, if the first preset condition is met, the first network device forwards the terminal device's uplink reception to the second network device Status report, and triggering the first network device to switch from an uplink anchor point to a non-uplink anchor point; wherein the uplink anchor point is used to deliver uplink data to the upper layer.
  • a handover processing method provided in this embodiment includes:
  • Step 31 When the second network device performs the first type of handover for the terminal device, it receives the uplink reception status report of the terminal device forwarded by the first network device, and triggers the second network device to switch to an uplink anchor point ; Wherein, the uplink anchor is used to deliver uplink data to the upper layer.
  • 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.
  • a corresponding switching process is described as an example. The entire switching process is divided into the following three stages, which can be seen in Figure 4, including:
  • Handover preparation stage As shown in Figure 4, 0-5, 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); 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 Figure 4, 6-7, the terminal device immediately executes the handover process after receiving the handover command, which may include the radio access network (RAN, Radio Access Network) between the terminal device and the first network device.
  • 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
  • the 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 8-12 in Figure 4, 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 network The 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 processing of uplink data forwarding and the processing of uplink anchor conversion start after receiving the handover request feedback from the second network device or forwarding the handover command to the terminal device, that is, early data forwarding and early uplink anchor An example of point switching.
  • Step 51 The terminal device performs measurement based on the network configuration and reports a measurement report when the conditions are met;
  • Step 52 The first network device determines the target base station based on the measurement report, and sends a handover request to the second network device;
  • Step 53 The first network device receives the handover request feedback from the second network device and forwards the target base station handover command to the terminal device;
  • Step 54 The first network device starts data forwarding to the second network device
  • the first network device to start data forwarding to the second network device may be started when a preset condition is met.
  • the first preset condition may include at least one of the following:
  • the first network device receives the handover request feedback sent by the second network device
  • the first network device sends a handover command to the terminal device.
  • the first preset condition may further include at least one of the following: the uplink is switched from the first network device to the second network device;
  • the terminal device After the random access is successful, the terminal device sends the first piece of uplink data based on the scheduling of the second network device.
  • the content to be forwarded may be: the first network device forwards the uplink reception status report of the terminal device to the second network device;
  • the first network device forwards the successfully received uplink data to the second network device.
  • the first network device When the first network device forwards the uplink reception status report of the terminal device to the second network device, and before the first network device forwards the successfully received uplink data to the second network device, the first network device serves as an uplink anchor, and delivers the successfully received uplink data to the upper layer in order.
  • the function of the uplink anchor point may include: receiving the uplink data sent by the terminal device, and submitting the uplink data to the upper layer (Upper Layer) in order, that is, to the core network in order.
  • the first network device forwards the successfully received uplink data to the second network device, it can be considered that the triggering condition for the handover of the uplink anchor is satisfied. At this time, the first network device is switched from the uplink anchor to the non-uplink. An anchor point, and the second network device satisfies the switching trigger condition of the uplink anchor point, and the second network device is switched from a non-uplink anchor point to an uplink anchor point.
  • the first network device no longer submits uplink data to the upper layer (that is, the core network), and the first network device sends the received uplink data of the terminal device to the second network A device, the second network device serves as an uplink anchor, and the uplink data of the terminal device forwarded by the first network device is sequentially delivered to the upper layer (that is, the core network).
  • this embodiment is for the first type of handover, that is, in a handover that can connect to two network devices at the same time, only one network device is responsible for submitting uplink data to the upper layer in sequence at the same time. Based on the foregoing processing, It is possible to clarify which network device is responsible for the orderly delivery of uplink data.
  • the foregoing processing includes a sequence, which can be understood as: when the first network device satisfies at least one of the foregoing first preset conditions, it may first forward the uplink reception status report of the terminal device to the second network device; at this time, The first network device serves as an uplink anchor, and delivers the successfully received uplink data to the upper layer in order.
  • the first network device forwards the uplink data of the terminal device to the second network device, it can be considered that the handover trigger condition of the uplink anchor point is satisfied.
  • the uplink anchor point is changed from the first network device to the second network device.
  • the second network device delivers the uplink data forwarded by the first network device to the upper layer in sequence.
  • the first network device forwards the uplink status reception report to the second network device.
  • the sequence numbers of the uplink data packets received by the terminal device by the first network device are 1, respectively. 3, 2, 4, the first network device acts as an uplink anchor, sorts the uplink data into 1, 2, 3, 4, and submits the sorted data packets to the core network;
  • the first network device continues to receive the uplink data 5, 7, 8, and 6 of the terminal device; at this time, the first network device forwards the uplink data 5, 7, 8, and 6 to the second network device, and since the first network device starts to The second network device forwards data and triggers the second network device to switch to an uplink anchor.
  • the first network device no longer performs data sorting, and can forward it to the second network device every time it receives a piece of data; the second network device As an uplink anchor point, the forwarded data 5, 7, 8, and 6 are sorted to obtain the uplink data 5, 6, 7, and 8, and then the second network device submits the sorted data to the core network.
  • the foregoing method for forwarding data from the first network device to the second network device may be: X2GTP-U tunnel.
  • the first network device can send the ID (identification) of the uplink UPF interface to the second network device in advance; then based on the aforementioned processing, when the second network device is triggered to switch to the uplink anchor point, it can be based on the aforementioned uplink UPF.
  • the ID of the interface determines the corresponding uplink UPF interface, and then the uplink data is delivered in order.
  • Step 55 During the process of the terminal device initiating random access to the second network device, the first network device and the terminal device maintain uplink and downlink data transmission, and forward the successfully received uplink data to the second network Device; The second network device receives the successfully received uplink and downlink data sent by the first network device, and submits the successfully received uplink data to the upper layer in order. At this time, the second network device may forward the downlink data to the terminal device through the first network device.
  • the uplink and downlink data may be PDCP (Packet Data Convergence Protocol) packet data convergence protocol SDU (service Data Unit, service data unit).
  • PDCP Packet Data Convergence Protocol
  • SDU service Data Unit, service data unit
  • the terminal device initiates a random access procedure to the second network device while retaining the protocol stack of the first network device. During this period, the terminal device and the first network device maintain uplink and downlink data (such as PDCP SDU) transmission. The network device will forward the successfully received PDCP SDU to the second network device, and the PDCP of the second network device will deliver it to the upper layer.
  • uplink and downlink data such as PDCP SDU
  • the PDCP layer of the second network device can guarantee the orderly delivery of PSCP SDUs.
  • Step 56 After the terminal device successfully accesses the second network device, for example, the RRC reconfiguration complete message is successfully sent, the uplink of the terminal device is switched from the first network device to the second network device.
  • the uplink data may include: the uplink of the terminal device is switched from the first network device to the second network device and/or the terminal device sends the first uplink based on the scheduling of the second network device after the random access is completed.
  • the first network device forwards the uplink data that needs to be retransmitted that has been retransmitted by the terminal device to the first network device.
  • the terminal device sends the uplink data to be transmitted and the uplink data that has not received correct feedback to the second network device through the first network device, if at this time the hybrid automatic repeat reQuest (Hybrid Automatic Repeat reQuest, HARQ) of the first network device
  • Hybrid Automatic Repeat reQuest Hybrid Automatic Repeat reQuest, HARQ
  • the terminal device will also maintain the transmission of the uplink data that needs to be retransmitted.
  • the terminal device retransmits the uplink data that needs to be retransmitted to the first network device.
  • the first network device sends the uplink data that needs to be retransmitted to the second network device.
  • the transmission of SN and/or HFN for uplink data can be at least one of the following:
  • the sequence number SN of the first network device forwarding at least one uplink data packet to the second network device;
  • the first network device forwards the superframe number HFN of at least one uplink data packet to the second network device;
  • the first network device forwards the sequence number SN and the superframe number HFN of at least one uplink data packet to the second network device.
  • the first network device may forward the uplink data packet to the second network device, and at the same time, only notify the second network device of the SN of each uplink data packet.
  • the first network device may forward the uplink data packet to the second network device; at the same time, the first network device transfers each The SN of the uplink data packet is notified to the second network device, and the HFN of each uplink data packet is notified to the second network device.
  • the first network device may forward the uplink data packet to the second network device; at the same time, the first network device will The SN of an uplink data packet is notified to the second network device, and the HFN of the first N uplink data packets is notified to the second network device. It should be understood that, in this case, when only the HFN of the first N uplink data packets is sent, the second network device can infer the HFN of the remaining uplink data packets based on the HFN of the first N uplink data packets.
  • N is an integer greater than or equal to 1
  • the first network device may forward the uplink data packet to the second network device; at the same time, the first N uplink data The SN and HFN of the packet are notified to the second network device. It should be understood that, in this case, when only the HFN of the first N uplink data packets is sent, the second network device can infer the SN and HFN of the remaining uplink data packets based on the SN and HFN of the first N uplink data packets.
  • the first network device forwards the downlink data packet to the second network device, and/or the first network device sends the downlink data packet for the terminal device to the second network device Status report sent.
  • the downlink data packet includes a downlink data packet to be transmitted and/or a downlink data packet for which correct feedback is not received.
  • Case 1 If the terminal device releases the connection with the first network device before the path switching, the first network device forwards the downlink data packet to the second network device.
  • the second preset condition includes at least one of the following:
  • the random access of the terminal device to the second network device is completed; that is, when it is determined that the terminal device completes the random access with the target cell, it can be considered that the terminal device has completed the release;
  • the first network device receives the instruction information for forwarding the downlink data packet sent by the second network device or the terminal device; in this case, it may be that the terminal device has completed random access, and then sends the instruction information to the first network device, Or, the second network device determines that the terminal device has completed random access, and then the second network device sends to the first network device information instructing it to forward the downlink data packet;
  • the terminal device completes the path switching from the first network device to the second network device; that is, the terminal device completes random access and has completed path switching;
  • the terminal device releases the connection with the first network device; similarly, the terminal device can release the uplink connection and the downlink connection with the first network device after completing random access.
  • the method further includes at least one of the following:
  • the first network device forwards the sequence number SN of at least one downlink data packet to the second network device;
  • the first network device forwards the superframe number HFN of at least one downlink data packet to the second network device;
  • the first network device forwards the sequence number SN and the superframe number HFN of at least one downlink data packet to the second network device.
  • the first network device can forward the downlink data packet to the second network device, and at the same time, only transfer each downlink data packet to the second network device.
  • the SN of the data packet is notified to the second network device.
  • the first network device may forward the downlink data packet to the second network device; at the same time, the first network device transfers each The SN of the downlink data packet is notified to the second network device, and the HFN of each downlink data packet is notified to the second network device.
  • the first network device may forward the downlink data packet to the second network device; at the same time, the first network device will The SN of a downlink data packet is notified to the second network device, and the HFN of the first N downlink data packets is notified to the second network device. It should be understood that, in this case, when only the HFN of the first N downlink data packets are sent, the second network device can infer the HFN of the remaining downlink data packets based on the HFN of the first N downlink data packets.
  • N is an integer greater than or equal to 1
  • the first network device may forward the downlink data packet to the second network device; at the same time, the first N downlink data
  • the SN and HFN of the packet are notified to the second network device. It should be understood that in this case, when only the HFN of the first N downlink data packets are sent, the second network device can infer the remaining downlink data packets that have not received correct feedback based on the SN and HFN of the first N downlink data packets. The SN and HFN.
  • the aforementioned first network device forwards the downlink data packet that does not receive the correct feedback to the second network device, which may be: start forwarding from the first downlink data packet that does not receive the correct feedback; or, only forward the downlink data packet that has not received the correct feedback. To the downlink data packets that are correctly fed back are forwarded.
  • the difference between the foregoing two cases is that the forwarding starts from the first downlink data packet that does not receive correct feedback. For example, if there are currently downlink data packets 1, 2, 3, 5, 6, and 7, among them, the downlink data If packets 3 and 6 do not receive correct feedback, the first network device starts to forward the downlink data packet 3.
  • the forwarded data packets include downlink data packets 3, 5, 6, and 7; at this time, regardless of the downstream data packet 3 Whether other data packets receive correct feedback, they are all forwarded.
  • Only forwarding the downlink data packet that has not received the correct feedback means that if the downlink data packet receives the correct feedback, it may not be forwarded. For example, if there are currently downlink data packets 1, 2, 3, 5, 6, 7, and the downlink data packets 3 and 6 do not receive correct feedback, then the first network device only forwards the downlink data to the second network device Packets 3 and 6; at this time, regardless of whether other data packets after the downlink data packet 3 receive correct feedback, they are all forwarded.
  • the second network device notifies the terminal device to send a downlink status report for indicating the downlink reception status of the terminal device.
  • the terminal device can generate a downlink status report indicating its own downlink reception status based on the foregoing notification, and send the downlink status report to the second network device; the second network device can determine to the terminal device based on the downlink status report of the terminal device Send data.
  • the second network device may send downlink data to the terminal device based on the downlink status report sent by the terminal device.
  • Case 2 If the terminal device releases the connection with the first network device after the path switch, the first network device sends to the second network device the status of sending a downlink data packet for the terminal device report.
  • the second network device determines the downlink reception status of the terminal device based on the downlink status report reported by the terminal device. At this time, the first network device may not forward any data.
  • Another example which is different from the previous example, is that the previous example precedes the uplink forwarding and uplink anchor switch when the handover situation feedback request is received; however, in the processing of this example, the uplink forwarding and the uplink anchor switch are placed after , It will be executed after the random access of the terminal equipment is successful.
  • Step 61 The terminal device performs measurement based on the network configuration and reports a measurement report when the conditions are met;
  • Step 62 The first network device determines the second network device based on the measurement report, and sends a switching request to the second network device;
  • Step 63 The first network device receives the feedback of the switching request of the second network device and forwards the switching command of the second network device to the terminal device;
  • Step 64 During the process of the terminal device initiating random access to the second network device, the first network device and the terminal device maintain uplink and downlink data transmission, and the first network device will successfully receive the uplink and downlink data transmission. Data packets are delivered to the upper layer in order.
  • the first network device and the terminal device maintain uplink and downlink data transmission, which may specifically include: the first network device sends downlink data to the terminal device, and the first network device receives an uplink data packet sent by the terminal device;
  • the first network device submits the successfully received uplink data packets to the upper layer in order.
  • the specific uplink and downlink data packets can be PDCP SDU or SDAP SDU
  • the terminal device initiates a random access procedure to the second network device while retaining the protocol stack of the first network device. During this period, the terminal device and the first network device maintain uplink and downlink transmissions, and the first network device will receive The PDCP SDU shall be submitted to the upper layer in order.
  • Step 65 After the terminal device successfully accesses the second network device, for example, the RRC reconfiguration complete message is successfully sent, the uplink of the terminal device is switched from the first network device to the second network device.
  • This step includes that when a first preset condition is met, the first network device forwards the uplink data of the terminal device to the second network device, and triggers the first network device to convert from an uplink anchor to Non-uplink anchor point. It also includes that the first network device forwards the uplink reception status report to the second network device.
  • the first preset condition is different from the foregoing example, and includes at least one of the following:
  • the first network device receives the instruction information sent by the second network device after determining that the terminal device is successfully switched;
  • the first network device receives the indication information sent after the terminal device has succeeded in random access
  • the instruction information is used to instruct the first network device to forward uplink data to the second network device.
  • the second network device instructs the first network device to perform uplink data forwarding after determining that the terminal device is successfully switched, or the terminal device sends instruction information to the first network device after successful random access, and indicates through the instruction information The first network device starts to forward data to the second network device.
  • the content to be forwarded may be: the first network device forwards the uplink reception status report of the terminal device to the second network device;
  • the first network device forwards the successfully received uplink data to the second network device.
  • the first network device When the first network device forwards the uplink reception status report of the terminal device to the second network device, and before the first network device forwards the successfully received uplink data to the second network device, the first network device serves as an uplink anchor, and delivers the successfully received uplink data to the upper layer in order.
  • the function of the uplink anchor point may include: receiving the uplink data sent by the terminal device, and submitting the uplink data to the upper layer (Upper Layer) in order, that is, to the core network in order.
  • the first network device forwards the successfully received uplink data to the second network device, it can be considered that the triggering condition for the handover of the uplink anchor is satisfied. At this time, the first network device is switched from the uplink anchor to the non-uplink. An anchor point, and the second network device satisfies the switching trigger condition of the uplink anchor point, and the second network device is switched from a non-uplink anchor point to an uplink anchor point.
  • the first network device no longer submits uplink data to the upper layer (that is, the core network), and the first network device sends the received uplink data of the terminal device to the second network A device, the second network device serves as an uplink anchor, and the uplink data of the terminal device forwarded by the first network device is sequentially delivered to the upper layer (that is, the core network).
  • this embodiment is for the first type of handover, that is, in the handover that can connect to two network devices at the same time, only one network device is responsible for submitting uplink data to the upper layer in sequence at the same time. It is possible to clarify which network device is responsible for the orderly delivery of uplink data.
  • the foregoing processing includes a sequence, which can be understood as: when the first network device satisfies at least one of the foregoing preset conditions, it may first forward the uplink reception status report of the terminal device to the second network device; at this time, the The first network device acts as an uplink anchor, and delivers the successfully received uplink data to the upper layer in order.
  • the first network device forwards the uplink data of the terminal device to the second network device, it can be considered that the handover trigger condition of the uplink anchor point is satisfied.
  • the uplink anchor point is changed from the first network device to the second network device.
  • the second network device delivers the uplink data forwarded by the first network device to the upper layer in sequence.
  • the first network device forwards the uplink status reception report to the second network device.
  • the sequence numbers of the uplink data packets received by the terminal device by the first network device are 1, respectively. 3, 2, 4, the first network device acts as an uplink anchor, sorts the uplink data into 1, 2, 3, 4, and submits the sorted data packets to the core network;
  • the first network device continues to receive the uplink data 5, 7, 8, and 6 of the terminal device; at this time, the first network device forwards the uplink data 5, 7, 8, and 6 to the second network device, and since the first network device starts to The second network device forwards data and triggers the second network device to switch to an uplink anchor.
  • the first network device no longer performs data sorting, and can forward to the second network device every time a piece of data is received; the second network device As an uplink anchor point, the forwarded data 5, 7, 8, and 6 are sorted to obtain the uplink data 5, 6, 7, and 8, and then the second network device submits the sorted data to the core network.
  • the foregoing method for forwarding data from the first network device to the second network device may be: X2GTP-U tunnel.
  • Step 66 The first network device forwards the successfully received uplink data and the status report of the uplink reception to the second network device, and the first network device stops scheduling new uplink HARQ transmission or retransmission to the terminal device.
  • it may further include: when the release condition is met, the terminal device releases the connection of the first network device.
  • the uplink data may include: the uplink of the terminal device is switched from the first network device to the second network device and/or the terminal device sends the first uplink based on the scheduling of the second network device after the random access is completed.
  • the first network device forwards the uplink data that needs to be retransmitted that has been retransmitted by the terminal device to the first network device.
  • the terminal device sends the uplink data to be transmitted and the uplink data that has not received correct feedback to the second network device through the first network device, if at this time the hybrid automatic repeat reQuest (Hybrid Automatic Repeat reQuest, HARQ) of the first network device
  • Hybrid Automatic Repeat reQuest Hybrid Automatic Repeat reQuest, HARQ
  • the terminal device will also maintain the transmission of the uplink data that needs to be retransmitted.
  • the terminal device retransmits the uplink data that needs to be retransmitted to the first network device.
  • the first network device sends the uplink data that needs to be retransmitted to the second network device.
  • the transmission of SN and/or HFN for uplink data can be at least one of the following:
  • the sequence number SN of the first network device forwarding at least one uplink data packet to the second network device;
  • the first network device forwards the superframe number HFN of at least one uplink data packet to the second network device;
  • the first network device forwards the sequence number SN and the superframe number HFN of at least one uplink data packet to the second network device.
  • the first network device may forward the uplink data packet to the second network device, and at the same time, only notify the second network device of the SN of each uplink data packet.
  • the first network device may forward the uplink data packet to the second network device; at the same time, the first network device transfers each The SN of the uplink data packet is notified to the second network device, and the HFN of each uplink data packet is notified to the second network device.
  • the first network device may forward the uplink data packet to the second network device; at the same time, the first network device will The SN of an uplink data packet is notified to the second network device, and the HFN of the first N uplink data packets is notified to the second network device. It should be understood that, in this case, when only the HFN of the first N uplink data packets is sent, the second network device can infer the HFN of the remaining uplink data packets based on the HFN of the first N uplink data packets.
  • N is an integer greater than or equal to 1
  • the first network device may forward the uplink data packet to the second network device; at the same time, the first N uplink data The SN and HFN of the packet are notified to the second network device. It should be understood that, in this case, when only the HFN of the first N uplink data packets is sent, the second network device can infer the SN and HFN of the remaining uplink data packets based on the SN and HFN of the first N uplink data packets.
  • the first network device forwards the downlink data packet to the second network device, and/or the first network device sends the downlink data packet for the terminal device to the second network device Status report sent.
  • the downlink data packet includes a downlink data packet to be transmitted and/or a downlink data packet for which correct feedback is not received.
  • Case 1 If the terminal device releases the connection with the first network device before the path switching, the first network device forwards the downlink data packet to the second network device.
  • the second preset condition includes at least one of the following:
  • the random access of the terminal device to the second network device is completed; that is, when it is determined that the terminal device completes the random access with the target cell, it can be considered that the terminal device has completed the release;
  • the first network device receives the instruction information for forwarding the downlink data packet sent by the second network device or the terminal device; in this case, it may be that the terminal device has completed random access, and then sends the instruction information to the first network device, Or, the second network device determines that the terminal device has completed random access, and then the second network device sends to the first network device information instructing it to forward the downlink data packet;
  • the terminal device completes the path switching from the first network device to the second network device; that is, the terminal device completes random access and has completed path switching;
  • the terminal device releases the connection with the first network device; similarly, the terminal device can release the uplink connection and the downlink connection with the first network device after completing random access.
  • the method further includes at least one of the following:
  • the first network device forwards the sequence number SN of at least one downlink data packet to the second network device;
  • the first network device forwards the superframe number HFN of at least one downlink data packet to the second network device;
  • the first network device forwards the sequence number SN and the superframe number HFN of at least one downlink data packet to the second network device.
  • the first network device can forward the downlink data packet to the second network device, and at the same time, only transfer each downlink data packet to the second network device.
  • the SN of the data packet is notified to the second network device.
  • the first network device may forward the downlink data packet to the second network device; at the same time, the first network device transfers each The SN of the downlink data packet is notified to the second network device, and the HFN of each downlink data packet is notified to the second network device.
  • the first network device may forward the downlink data packet to the second network device; at the same time, the first network device will The SN of a downlink data packet is notified to the second network device, and the HFN of the first N downlink data packets is notified to the second network device. It should be understood that, in this case, when only the HFN of the first N downlink data packets are sent, the second network device can infer the HFN of the remaining downlink data packets based on the HFN of the first N downlink data packets.
  • N is an integer greater than or equal to 1
  • the first network device may forward the downlink data packet to the second network device; at the same time, the first N downlink data
  • the SN and HFN of the packet are notified to the second network device. It should be understood that in this case, when only the HFN of the first N downlink data packets are sent, the second network device can infer the remaining downlink data packets that have not received correct feedback based on the SN and HFN of the first N downlink data packets. The SN and HFN.
  • the aforementioned first network device forwards the downlink data packet that does not receive the correct feedback to the second network device, which may be: start forwarding from the first downlink data packet that does not receive the correct feedback; or, only forward the downlink data packet that has not received the correct feedback. To the downlink data packets that are correctly fed back are forwarded.
  • the difference between the foregoing two cases is that the forwarding starts from the first downlink data packet that does not receive correct feedback. For example, if there are currently downlink data packets 1, 2, 3, 5, 6, and 7, among them, the downlink data If packets 3 and 6 do not receive correct feedback, the first network device starts to forward the downlink data packet 3.
  • the forwarded data packets include downlink data packets 3, 5, 6, and 7; at this time, regardless of the downstream data packet 3 Whether other data packets receive correct feedback, they are all forwarded.
  • Only forwarding the downlink data packet that has not received the correct feedback means that if the downlink data packet receives the correct feedback, it may not be forwarded. For example, if there are currently downlink data packets 1, 2, 3, 5, 6, 7, and the downlink data packets 3 and 6 do not receive correct feedback, then the first network device only forwards the downlink data to the second network device Packets 3 and 6; at this time, regardless of whether other data packets after the downlink data packet 3 receive correct feedback, they are all forwarded.
  • the second network device notifies the terminal device to send a downlink status report for indicating the downlink reception status of the terminal device.
  • the terminal device can generate a downlink status report indicating its own downlink reception status based on the foregoing notification, and send the downlink status report to the second network device; the second network device can determine to the terminal device based on the downlink status report of the terminal device Send data.
  • the second network device may send downlink data to the terminal device based on the downlink status report sent by the terminal device.
  • Case 2 If the terminal device releases the connection with the first network device after the path switch, the first network device sends to the second network device the status of sending a downlink data packet for the terminal device report.
  • the second network device determines the downlink reception status of the terminal device based on the downlink status report reported by the terminal device. At this time, the first network device may not forward any data.
  • the first network device in the process of the first type of handover, can forward the uplink reception status report to the second network device, and trigger the conversion of the uplink anchor point of the first network device or the second network device , And through the conversion of the uplink anchor point to control which network device to submit the uplink data. Therefore, the problem of data forwarding and uplink anchor switching of the first network device in the first type of handover is solved, and the second data forwarding and status report update of the first network device after the handover is completed are also solved.
  • the embodiment of the present invention provides a network device, as shown in FIG. 7, including:
  • the first processing unit 71 in the process of performing the first type of handover for the terminal device, if the first preset condition is met, forward the uplink reception status report of the terminal device to the second network device through the first communication unit , And triggering the conversion of the first network device from an uplink anchor point to a non-uplink anchor point; wherein the uplink anchor point is used to deliver uplink data to the upper layer;
  • the first communication unit 72 is configured to forward the uplink reception status report of the terminal device to the second network device.
  • a network device provided in this embodiment includes:
  • the second processing unit 81 receives the uplink reception status report of the terminal device forwarded by the first network device through the second communication unit during the process of performing the first type of handover for the terminal device, and triggers the second network device to switch Is the uplink anchor point;
  • the second communication unit 82 receives the uplink reception status report of the terminal device forwarded by the first network device.
  • the first type of handover is: a handover that maintains a connection with the second network device and the first 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 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 maintain the connection with the first network device and the second network device at the same time during handover.
  • the processing of uplink data forwarding and the processing of uplink anchor conversion start after receiving the handover request feedback of the second network device or forwarding the handover command to the terminal device.
  • the terminal device performs measurement based on the network configuration and reports the measurement report when the conditions are met;
  • the first processing unit 71 of the first network device determines the target base station based on the measurement report, and sends a handover request to the second network device through the first communication unit 72;
  • the first network device receives the switching request feedback of the second communication unit 82 of the second network device through the first communication unit 72 and forwards the switching command to the terminal device;
  • the first network device starts data forwarding to the second communication unit 82 of the second network device through the first communication unit 72;
  • the first network device to start data forwarding to the second network device may be started when a preset condition is met.
  • the first preset condition may include at least one of the following:
  • the first network device receives the handover request feedback sent by the second network device
  • the first network device sends a handover command to the terminal device.
  • the first preset condition may further include at least one of the following: the uplink is switched from the first network device to the second network device;
  • the terminal device After the random access is successful, the terminal device sends the first piece of uplink data based on the scheduling of the second network device.
  • the content to be forwarded may be: the first network device forwards the uplink reception status report of the terminal device to the second network device;
  • the first network device forwards the successfully received uplink data to the second network device.
  • the first network device forwards the uplink reception status report of the terminal device to the second network device, and before the first network device forwards the successfully received uplink data to the second network device, The first network device serves as an uplink anchor, and the successfully received uplink data is delivered to the upper layer in order through the first communication unit 72.
  • the function of the uplink anchor point may include: receiving the uplink data sent by the terminal device, and submitting the uplink data to the upper layer (Upper Layer) in order, that is, to the core network in order.
  • the first network device maintains uplink and downlink data transmission with the terminal device through the first communication unit 72, and forwards the successfully received uplink and downlink data To the second communication unit 82 of the second network device; the second communication unit 82 of the second network device receives the successfully received uplink and downlink data sent by the first network device, and sequentially receives the uplink and downlink data Submit to the upper level.
  • the uplink and downlink data may be PDCP (Packet Data Convergence Protocol) packet data convergence protocol SDU (service Data Unit, service data unit).
  • PDCP Packet Data Convergence Protocol
  • SDU service Data Unit, service data unit
  • the uplink of the terminal device is switched from the first network device to the second network device.
  • the terminal device releases the connection of the first network device.
  • Case 1 If the terminal device releases the connection with the first network device before the path switch, the first network device transmits the downlink data packet to be transmitted and/or not received the correct data packet through the first communication unit 72 The feedback downlink data packet is forwarded to the second network device.
  • the first network device forwards the downlink data packet to be transmitted and/or the downlink data packet that has not received correct feedback to the second network device
  • the first network device forwards the sequence number SN of the downlink data packet that has not received correct feedback to the second network device through the first communication unit 72; or, the first network device forwards the sequence number SN of the downlink data packet that has not received correct feedback to the second network device through the first communication unit 72.
  • the second network device forwards the sequence number SN and the superframe number HFN of the downlink data packet that has not received the correct feedback.
  • the first communication unit 72 performs at least one of the following:
  • N is an integer greater than or equal to 1;
  • Case 2 If the terminal device releases the connection with the first network device after the path switch, the first network device sends a downlink for the terminal device to the second network device through the first communication unit 72 The feedback status of the data packet transmission.
  • the second processing unit 81 of the second network device determines the downlink reception status of the terminal device based on the downlink status report reported by the terminal device .
  • the first network device may not forward any data.
  • Another example which is different from the previous example, is that the previous example precedes the uplink forwarding and uplink anchor switch when the handover situation feedback request is received; however, in the processing of this example, the uplink forwarding and the uplink anchor switch are placed after , It will be executed after the random access of the terminal equipment is successful.
  • the terminal device performs measurement based on the network configuration and reports a measurement report when the conditions are met; the first processing unit 71 of the first network device determines the second network device based on the measurement report, and sends a handover request to the second network device through the first communication unit 72 ;
  • the first network device receives the switching request feedback of the second network device through the first communication unit 72 and forwards the switching command to the terminal device;
  • the first network device maintains uplink and downlink data transmission with the terminal device through the first communication unit 72, and transfers the successfully received uplink and downlink data packets Submit to the upper level in order.
  • the uplink of the terminal device is switched from the first network device to the second network device.
  • the first network device forwards the uplink data of the terminal device to the second network device, and triggers the first network device to switch from an uplink anchor to a non-uplink Anchor point. It also includes that the first network device forwards the uplink reception status report to the second network device.
  • the preset condition is different from the foregoing example, and includes at least one of the following:
  • the first network device receives, through the first communication unit 72, the instruction information sent by the second network device after determining that the terminal device is successfully switched;
  • the first network device receives, through the first communication unit 72, the instruction information sent after the random access of the terminal device is successful;
  • the instruction information is used to instruct the first network device to forward uplink data to the second network device.
  • the content of the forwarding is the same as the foregoing example, and will not be repeated here.
  • the first network device forwards the successfully received uplink data and the status report of the uplink reception to the second network device through the first communication unit 72, and the first network device stops scheduling new uplink HARQ transmission or retransmission to the terminal device.
  • the terminal device releases the connection of the first network device.
  • the two situations that exist are the same as the previous example, and will not be repeated here.
  • FIG. 9 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 or the terminal device in the foregoing embodiment.
  • the communication device 900 shown in FIG. 9 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. 10 is a schematic structural diagram of a chip according to an embodiment of the present invention.
  • the chip 1000 shown in FIG. 10 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 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. 11 is a schematic block diagram of a communication system 800 provided by an embodiment of the present application. As shown in FIG. 11, 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 executes 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 existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present 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 disk or optical disk and other media that can store program code .

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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，若满足第一预设条件，则所述第一网络设备向所述第二网络设备转发所述终端设备的上行接收状态报告，以及触发所述第一网络设备由上行锚点转换为非上行锚点；其中，所述上行锚点用于将上行数据递交至上层。

Description

一种切换处理方法、网络设备 技术领域
本发明涉及通信技术领域，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，如何进行状态报告等数据的转发，以及如何向上层递交上行数据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，若满足第一预设条件，则所述第一网络设备向所述第二网络设备转发所述终端设备的上行接收状态报告，以及触发所述第一网络设备由上行锚点转换为非上行锚点；其中，所述上行锚点用于将上行数据递交至上层。
第二方面，提供了一种切换处理方法，所述方法包括：
第二网络设备执行针对终端设备的第一类切换的过程中，接收第一网络设备转发的所述终端设备的上行接收状态报告，以及触发所述第二网络设备转换为上行锚点；
其中，所述上行锚点用于将上行数据递交至上层。
第三方面，提供了一种网络设备，包括：
第一处理单元，执行针对终端设备的第一类切换的过程中，若满足第一预设条件，则通过第一通信单元向所述第二网络设备转发所述终端设备的上行接收状态报告，以及触发所述第一网络设备由上行锚点转换为非上行锚点；其中，所述上行锚点用于将上行数据递交至上层；
第一通信单元，用于向所述第二网络设备转发所述终端设备的上行接收状态报告。
第四方面，提供了一种网络设备，包括：
第二处理单元，执行针对终端设备的第一类切换的过程中，通过第二通信单元接收第一网络设备转发的所述终端设备的上行接收状态报告，以及触发所述第二网络设备转换为上行锚点；
第二通信单元，接收第一网络设备转发的所述终端设备的上行接收状态报告。
第五方面，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、第二方面或其各实现方式中的方法。
第六方面，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、第二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、第二方面或其各实现方式中的方法。
第八方面，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、第二方面或其各实现方式中的方法。
第九方面，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、第二方面或其各实现方式中的方法。
通过采用上述方案，能够在进行第一类切换的过程中，第一网络设备可以向第二网络设备转发上行接收状态报告，并且触发第一网络设备或第二网络设备的上行锚点的转换，并且通过上行锚点的转换来控制哪个网络设备进行上行数据的递交。从而，解决了在第一类切换中第一网络设备数据转发与上行锚点切换的问题，也解决了第一网络设备在切换完成后进行二次数据转发以及状态报告更新的问题。
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一；
图3为本发明实施例提供的一种切换处理方法流程示意图二；
图4为一种切换流程示意图；
图5为本发明实施例提供的一种切换处理方法流程示意图三；
图6为本发明实施例提供的一种切换处理方法流程示意图四；
图7为本发明实施例提供的网络设备组成结构示意图一；
图8为本发明实施例提供的网络设备组成结构示意图二；
图9为本发明实施例提供的一种通信设备组成结构示意图；
图10是本申请实施例提供的一种芯片的示意性框图；
图11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可以是与终端设备120(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终端设备进行通信。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终端设备120。作为在此使用的“终端设备”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/或另一终端设备的被设置成接收/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终端设备可以被称为“无线通信终端”、“无线终端”或“移动终端”。
可选地，终端设备120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，若满足第一预设条件，则所述第一网络设备向所述第二网络设备转发所述终端设备的上行接收状态报告，以及触发所述第一网络设备由上行锚点转换为非上行锚点；其中，所述上行锚点用于将上行数据递交至上层。
相应的，本实施例提供的一种切换处理方法，如图3所示，包括：
步骤31：第二网络设备执行针对终端设备的第一类切换的过程中，接收第一网络设备转发的所述终端设备的上行接收状态报告，以及触发所述第二网络设备转换为上行锚点；其中，所述上行锚点用于将上行数据递交至上层。
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4所示，包括：
切换准备阶段：如图4中所示的0-5，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4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4中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。
在前述切换场景的基础上，结合以下几种示例对本实施例提供的方案进行详细说明：
在一种示例中，进行上行数据转发的处理以及上行锚点转换的处理为在接收到第二网络设备的切换请求反馈或者转发切换命令给终端设备之后开始，也就是早期数据转发以及早期上行锚点切换的一种示例。
具体来说，如图5所示，包括以下处理：
步骤51：终端设备基于网络配置执行测量并在条件满足时上报测量报告；
步骤52：第一网络设备基于测量报告确定目标基站，并向第二网络设备发送切换请求；
步骤53：第一网络设备收到第二网络设备的切换请求反馈并转发目标基站切换命令给终端设备；
步骤54：第一网络设备向第二网络设备开始数据转发；
这里，第一网络设备向第二网络设备开始数据转发可以为在满足预设条件的情况下开始执行。
其中，所述第一预设条件可以包括以下至少之一：
所述第一网络设备接收到第二网络设备发送的切换请求反馈；
所述第一网络设备向终端设备发送切换命令。
所述第一预设条件还可以包括以下至少之一：上行链路由第一网络设备转换到第二网络设备；
终端设备在随机接入成功后基于第二网络设备的调度发送第一条上行数据。
再进一步地，本步骤中，进行转发的内容可以为：所述第一网络设备向所述第二网络设备转发所述终端设备的上行接收状态报告；
所述第一网络设备向所述第二网络设备转发成功接收的上行数据。
在所述第一网络设备向所述第二网络设备转发所述终端设备的上行接收状态报告时，并且在所述第一网络设备向所述第二网络设备转发成功接收的上行数据之前，所述第一网络设备作为上行锚点，将成功接收的上行数据按序递交上层。
其中，上行锚点的功能可以包括：接收到终端设备发送的上行数据，将所述上行数据按序递交上层(Upper Layer)，也就是按序递交至核心网。
进而，若所述第一网络设备向所述第二网络设备转发成功接收的上行数据，则可以认为满足上行锚点的切换触发条件，此时，第一网络设备由上行锚点切换至非上行锚点，并且，第二网络设备满足上述上行锚点的切换触发条件，第二网络设备由非上行锚点切换为上行锚点。
在所述第二网络设备切换为上行锚点后，第一网络设备不再向上层(也就是核心网)递交上行数据，第一网络设备将接收到的终端设备的上行数据发送至第二网络设备，所述第二网络设备作为上行锚点，将第一网络设备转发的终端设备的上行数据按序递交至上层(也就是核心网)。
可以看出，由于本实施例针对第一类切换，也就是可以同时与两个网络设备进行连接的切换中，在同一时间仅有一个网络设备负责向上层按序递交上行数据，基于前述处理，就能够明确具体由哪个网络设备进行上行数据的按序递交。
前述处理包含先后顺序，可以理解为：第一网络设备在满足前述第一预设条件中至少之一的时候，可以先向第二网络设备转发所述终端设备的上行接收状态报告；此时，所述第一网络设备作为上行锚点，将成功接收的上行数据按序递交上层。在第一网络设备向第二网络设备转发终端设备的上行数据的时候，可以认为满足上行锚点的切换触发条件，此时上行锚点由第一网络设备变为第二网络设备，进而，第二网络设备将第一网络设备转发的上行数据按序递交上层。
举例来说，当满足前述第一预设条件的时候，第一网络设备向第二网络设备转发上行状态接收报告，此时第一网络设备接收到终端设备的上行数据包的序号分别为1、3、2、4，则第一网络设备作为上行锚点，将上行数据进行排序为1、2、3、4，将排序之后的数据包提交至核心网；
第一网络设备再持续接收终端设备的上行数据5、7、8、6；此时第一网络设备向第二网络设备转发上行数据5、7、8、6，并且由于第一网络设备开始向第二网络设备进行数据转发，触发第二网络设备转换为上行锚点，则第一网络设备不再进行数据排序，可以在每接收到一个数据就想第二网络设备进行转发；第二网络设备作为上行锚点，将转 发过来的数据5、7、8、6进行排序得到上行数据5、6、7、8，然后第二网络设备将排序后的数据递交核心网。
前述第一网络设备向第二网络设备进行数据转发的方式可以为：X2GTP-U隧道(tunnel)。
最后需要指出的是，第一网络设备可以预先向第二网络设备发送上行UPF接口的ID(标识)；然后基于前述处理第二网络设备被触发转换为上行锚点的时候，可以基于前述上行UPF接口的ID确定对应的上行UPF接口，进而进行上行数据的按序递交。
步骤55：在所述终端设备向第二网络设备发起随机接入的过程中，所述第一网络设备与所述终端设备保持上下行数据传输，将成功接收到的上行数据转发至第二网络设备；所述第二网络设备接收第一网络设备发来的成功接收到的上下行数据，将成功接收到的上行数据按照顺序递交上层。此时，可以由第二网络设备将下行数据通过第一网络设备转发至终端设备。
其中，所述上下行数据可以为PDCP(Packet Data Convergence Protocol)分组数据汇聚协议SDU(service Data Unit，服务数据单元)。
也就是说，终端设备向第二网络设备发起随机接入流程并同时保留第一网络设备的协议栈，在此期间终端设备与第一网络设备保持上下行数据(比如PDCP SDU)传输，第一网络设备会把成功接收的PDCP SDU转发给第二网络设备，由第二网络设备的PDCP递交上层。
本步骤中，第二网络设备由于已经作为上行锚点，因此第二网络设备的PDCP层可以保障PSCP SDU的按序递交。
步骤56：当终端设备成功接入第二网络设备后，比如成功发送了RRC重配完成消息，终端设备的上行链路由第一网络设备切换至第二网络设备。
在终端设备释放第一网络设备的连接中，针对上行数据以及下行数据分别进行说明：
其中，针对上行数据可以包括：所述终端设备的上行链路由第一网络设备切换至第二网络设备和/或终端设备在随机接入完成后基于第二网络设备的调度发送第一条上行数据时，若所述第一网络设备的HARQ重传缓存中存在需要重传的上行数据，则所述第一网络设备将接收到终端设备重传的所述需要重传的上行数据转发至第二网络设备。
也就是说，在所述终端设备的上行链路由第一网络设备切换至第二网络设备和/或终端设备在随机接入完成后基于第二网络设备的调度发送第一条上行数据时，终端设备将待传输的上行数据以及未收到正确反馈的上行数据通过第一网络设备发送给第二网络设备，若此时第一网络设备的混合自动重传请求(Hybrid Automatic Repeat reQuest，HARQ)重传缓存(buffer)中有需要重传的上行数据，终端设备还会保持该需要重传的上行数据的传输，具体的为：终端设备向第一网络设备重传所述需要重传的上行数据，然后由第一网络设备将该需要重传的上行数据发送给第二网络设备。
需要指出的是，在上行数据的转发时，针对上行数据的SN和/或HFN的发送，可以为以下至少之一：
所述第一网络设备向所述第二网络设备转发至少一个上行数据包的序列号SN；
所述第一网络设备向所述第二网络设备转发至少一个上行数据包的超帧号HFN；
所述第一网络设备向所述第二网络设备转发至少一个上行数据包的序列号SN以及超帧号HFN。
也就是说，第一网络设备可以将上行数据包转发给第二网络设备，同时，仅将每一个上行数据包的SN通知给第二网络设备。
或者，若在路径切换之前所述终端设备释放与第一网络设备之间的连接的情况下，第一网络设备可以将上行数据包转发给第二网络设备；同时，第一网络设备将每一个上 行数据包的SN通知给第二网络设备，以及每一个上行数据包的HFN通知给第二网络设备。
又或者，若在路径切换之前所述终端设备释放与第一网络设备之间的连接的情况下，第一网络设备可以将上行数据包转发给第二网络设备；同时，第一网络设备将每一个上行数据包的SN通知给第二网络设备，以及前N个上行数据包的HFN通知给第二网络设备。需要理解的是，这种情况下，仅发送前N个上行数据包的HFN时，第二网络设备可以基于前N个上行数据包的HFN推测得到其余上行数据包的的HFN。N为大于等于1的整数
再或者，若在路径切换之前所述终端设备释放与第一网络设备之间的连接的情况下，第一网络设备可以将上行数据包转发给第二网络设备；同时，将前N个上行数据包的SN和HFN通知给第二网络设备。需要理解的是，这种情况下，仅发送前N个上行数据包的HFN时，第二网络设备可以基于前N个上行数据包的SN以及HFN推测得到其余上行数据包的的SN以及HFN。
针对下行数据：
若满足第二预设条件，则第一网络设备转发下行数据包给第二网络设备，和/或所述第一网络设备向所述第二网络设备发送针对所述终端设备的下行数据包的发送的状态报告。其中，所述下行数据包，包括待传输的下行数据包和/或未收到正确反馈的下行数据包。
具体可以存在以下两种情况：
情况一、若在路径切换之前所述终端设备释放与第一网络设备之间的连接，则第一网络设备转发下行数据包给第二网络设备。
其中，所述第二预设条件，包括以下至少之一：
终端设备对第二网络设备的随机接入完成；也就是说，在确定终端设备与目标小区完成随机接入的时候，可以认为终端设备完成释放；
所述第一网络设备收到第二网络设备或者终端设备发送的转发下行数据包的指示信息；这种情况，可以为终端设备已经完成随机接入，然后向第一网络设备发送该指示信息，或者，第二网络设备确定终端设备已经完成随机接入，然后第二网络设备向第一网络设备发送指示其转发下行数据包的信息；
所述终端设备由第一网络设备至第二网络设备的路径切换完成；也就是说，终端设备完成随机接入，并且已经完成路径切换；
所述终端设备释放与第一网络设备的连接；同样的，终端设备在完成随机接入之后，可以释放与第一网络设备之间的上行连接以及下行连接。
所述第一网络设备将待传输的下行数据包和/或未收到正确反馈的下行数据包转发至第二网络设备时，所述方法还包括以下至少之一：
所述第一网络设备向所述第二网络设备转发至少一个下行数据包的序列号SN；
所述第一网络设备向所述第二网络设备转发至少一个下行数据包的超帧号HFN；
所述第一网络设备向所述第二网络设备转发至少一个下行数据包的序列号SN以及超帧号HFN。
也就是说，若在路径切换之前所述终端设备释放与第一网络设备之间的连接的情况下，第一网络设备可以将下行数据包转发给第二网络设备，同时，仅将每一个下行数据包的SN通知给第二网络设备。
或者，若在路径切换之前所述终端设备释放与第一网络设备之间的连接的情况下，第一网络设备可以将下行数据包转发给第二网络设备；同时，第一网络设备将每一个下行数据包的SN通知给第二网络设备，以及每一个下行数据包的HFN通知给第二网络设 备。
又或者，若在路径切换之前所述终端设备释放与第一网络设备之间的连接的情况下，第一网络设备可以将下行数据包转发给第二网络设备；同时，第一网络设备将每一个下行数据包的SN通知给第二网络设备，以及前N个下行数据包的HFN通知给第二网络设备。需要理解的是，这种情况下，仅发送前N个下行数据包的HFN时，第二网络设备可以基于前N个下行数据包的HFN推测得到其余下行数据包的的HFN。N为大于等于1的整数
再或者，若在路径切换之前所述终端设备释放与第一网络设备之间的连接的情况下，第一网络设备可以将下行数据包转发给第二网络设备；同时，将前N个下行数据包的SN和HFN通知给第二网络设备。需要理解的是，这种情况下，仅发送前N个下行数据包的HFN时，第二网络设备可以基于前N个下行数据包的SN以及HFN推测得到其余未收到正确反馈的下行数据包的的SN以及HFN。
再进一步地，前述第一网络设备向第二网络设备转发未收到正确反馈的下行数据包，可以为：从第一个未收到正确反馈的下行数据包开始转发；或者，仅将未收到正确反馈的下行数据包进行转发。
前述两种情况的区别在于，从第一个未收到正确反馈的下行数据包开始转发，举例来说，如果当前存在下行数据包1、2、3、5、6、7，其中，下行数据包3、6未收到正确反馈，那么第一网络设备从下行数据包3开始进行转发，转发的数据包包括有下行数据包3、5、6、7；此时不论下行数据包3之后的其他数据包是否收到正确反馈，都进行转发。
仅将未收到正确反馈的下行数据包进行转发，则指的是如果下行数据包收到正确反馈，则可以不进行转发。举例来说，如果当前存在下行数据包1、2、3、5、6、7，其中，下行数据包3、6未收到正确反馈，那么第一网络设备仅向第二网络设备转发下行数据包3、6；此时不论下行数据包3之后的其他数据包是否收到正确反馈，都进行转发。
可选地，此时，所述第二网络设备通知终端设备发送用于指示终端设备的下行接收状态的下行状态报告。相应的，终端设备可以基于前述通知，生成指示自身的下行接收状态的下行状态报告，并且向第二网络设备发送下行状态报告；第二网络设备可以基于终端设备的下行状态报告，确定向终端设备下发数据。
也就是第二网络设备可以基于终端设备发来的下行状态报告向终端设备发送下行数据。
本情况中，还可以向第二网络设备发送针对所述终端设备的下行数据包的发送的状态报告。
情况二、若在路径切换之后所述终端设备释放与第一网络设备之间的连接，所述第一网络设备向所述第二网络设备发送针对所述终端设备的下行数据包的发送的状态报告。
又或者，若在路径切换之后所述终端设备释放与第一网络设备之间的连接，所述第二网络设备基于终端设备上报的下行状态报告确定终端设备的下行接收状态。此时，第一网络设备可以不进行任何数据的转发。
另一示例，与前述示例不同在于，前述示例将上行转发以及上行锚点转换前置在切换情况反馈请求接收的时候；但是，本示例的处理中，将上行转发以及上行锚点的切换后置，放在终端设备随机接入成功后来执行。
下面，结合图6进行具体说明：
步骤61：终端设备基于网络配置执行测量并在条件满足时上报测量报告；
步骤62：第一网络设备基于测量报告确定第二网络设备，并向第二网络设备发送切 换请求；
步骤63：第一网络设备收到第二网络设备的切换请求反馈并转发第二网络设备切换命令给终端设备；
步骤64：在所述终端设备向第二网络设备发起随机接入的过程中，所述第一网络设备与所述终端设备保持上下行数据传输，所述第一网络设备将成功接收到的上行数据包按照顺序递交上层。
其中，所述第一网络设备与终端设备保持上下行数据传输，具体可以包括：第一网络设备向所述终端设备发送下行数据，并且第一网络设备接收终端设备发送的上行数据包；
进而，第一网络设备将成功接收到的上行数据包按照顺序提交上层。
其中，上下行数据包具体的可以为PDCP SDU或者SDAP SDU
也就是说，终端设备向第二网络设备发起随机接入流程并同时保留第一网络设备的协议栈，在此期间终端设备与第一网络设备保持上下行传输，第一网络设备会把成功接收的PDCP SDU按序递交上层。
步骤65：当终端设备成功接入第二网络设备后，比如成功发送了RRC重配完成消息，终端设备的上行链路由第一网络设备切换至第二网络设备。
本步骤中，包含当满足第一预设条件时，所述第一网络设备向所述第二网络设备转发所述终端设备的上行数据，以及触发所述第一网络设备由上行锚点转换为非上行锚点。其中还包括第一网络设备向第二网络设备转发上行接收状态报告。
其中，所述第一预设条件与前述示例不同，包括以下至少之一：
所述第一网络设备接收到第二网络设备在确定终端设备切换成功之后发来的指示信息；
所述第一网络设备接收到终端设备随机接入成功之后发来的指示信息；
其中，所述指示信息用于指示第一网络设备向第二网络设备进行上行数据转发。
也就是说，第二网络设备确定终端设备切换成功后指示第一网络设备进行上行数据转发(data forwarding)，或者，终端设备随机接入成功后向第一网络设备发送指示信息，通过指示信息指示第一网络设备开始向第二网络设备进行数据转发。
再进一步地，本步骤中，进行转发的内容可以为：所述第一网络设备向所述第二网络设备转发所述终端设备的上行接收状态报告；
所述第一网络设备向所述第二网络设备转发成功接收的上行数据。
在所述第一网络设备向所述第二网络设备转发所述终端设备的上行接收状态报告时，并且在所述第一网络设备向所述第二网络设备转发成功接收的上行数据之前，所述第一网络设备作为上行锚点，将成功接收的上行数据按序递交上层。
其中，上行锚点的功能可以包括：接收到终端设备发送的上行数据，将所述上行数据按序递交上层(Upper Layer)，也就是按序递交至核心网。
进而，若所述第一网络设备向所述第二网络设备转发成功接收的上行数据，则可以认为满足上行锚点的切换触发条件，此时，第一网络设备由上行锚点切换至非上行锚点，并且，第二网络设备满足上述上行锚点的切换触发条件，第二网络设备由非上行锚点切换为上行锚点。
在所述第二网络设备切换为上行锚点后，第一网络设备不再向上层(也就是核心网)递交上行数据，第一网络设备将接收到的终端设备的上行数据发送至第二网络设备，所述第二网络设备作为上行锚点，将第一网络设备转发的终端设备的上行数据按序递交至上层(也就是核心网)。
可以看出，由于本实施例针对第一类切换，也就是可以同时与两个网络设备进行连 接的切换中，在同一时间仅有一个网络设备负责向上层按序递交上行数据，基于前述处理，就能够明确具体由哪个网络设备进行上行数据的按序递交。
前述处理包含先后顺序，可以理解为：第一网络设备在满足前述预设条件中至少之一的时候，可以先向第二网络设备转发所述终端设备的上行接收状态报告；此时，所述第一网络设备作为上行锚点，将成功接收的上行数据按序递交上层。在第一网络设备向第二网络设备转发终端设备的上行数据的时候，可以认为满足上行锚点的切换触发条件，此时上行锚点由第一网络设备变为第二网络设备，进而，第二网络设备将第一网络设备转发的上行数据按序递交上层。
举例来说，当满足前述第一预设条件的时候，第一网络设备向第二网络设备转发上行状态接收报告，此时第一网络设备接收到终端设备的上行数据包的序号分别为1、3、2、4，则第一网络设备作为上行锚点，将上行数据进行排序为1、2、3、4，将排序之后的数据包提交至核心网；
第一网络设备再持续接收终端设备的上行数据5、7、8、6；此时第一网络设备向第二网络设备转发上行数据5、7、8、6，并且由于第一网络设备开始向第二网络设备进行数据转发，触发第二网络设备转换为上行锚点，则第一网络设备不再进行数据排序，可以在每接收到一个数据就向第二网络设备进行转发；第二网络设备作为上行锚点，将转发过来的数据5、7、8、6进行排序得到上行数据5、6、7、8，然后第二网络设备将排序后的数据递交核心网。
前述第一网络设备向第二网络设备进行数据转发的方式可以为：X2GTP-U隧道(tunnel)。
步骤66：第一网络设备转发成功接收的上行数据以及上行接收的状态报告给第二网络设备，并且所述第一网络设备停止调度上行HARQ的新传或者重传给终端设备。
在本步骤中，还可以包括：当满足释放条件时，终端设备释放第一网络设备连接。
在终端设备释放第一网络设备的连接的处理中，针对上行数据以及下行数据分别进行说明：
其中，针对上行数据可以包括：所述终端设备的上行链路由第一网络设备切换至第二网络设备和/或终端设备在随机接入完成后基于第二网络设备的调度发送第一条上行数据时，若所述第一网络设备的HARQ重传缓存中存在需要重传的上行数据，则所述第一网络设备将接收到终端设备重传的所述需要重传的上行数据转发至第二网络设备。
也就是说，在所述终端设备的上行链路由第一网络设备切换至第二网络设备和/或终端设备在随机接入完成后基于第二网络设备的调度发送第一条上行数据时，终端设备将待传输的上行数据以及未收到正确反馈的上行数据通过第一网络设备发送给第二网络设备，若此时第一网络设备的混合自动重传请求(Hybrid Automatic Repeat reQuest，HARQ)重传缓存(buffer)中有需要重传的上行数据，终端设备还会保持该需要重传的上行数据的传输，具体的为：终端设备向第一网络设备重传所述需要重传的上行数据，然后由第一网络设备将该需要重传的上行数据发送给第二网络设备。
需要指出的是，在上行数据的转发时，针对上行数据的SN和/或HFN的发送，可以为以下至少之一：
所述第一网络设备向所述第二网络设备转发至少一个上行数据包的序列号SN；
所述第一网络设备向所述第二网络设备转发至少一个上行数据包的超帧号HFN；
所述第一网络设备向所述第二网络设备转发至少一个上行数据包的序列号SN以及超帧号HFN。
也就是说，第一网络设备可以将上行数据包转发给第二网络设备，同时，仅将每一个上行数据包的SN通知给第二网络设备。
或者，若在路径切换之前所述终端设备释放与第一网络设备之间的连接的情况下，第一网络设备可以将上行数据包转发给第二网络设备；同时，第一网络设备将每一个上行数据包的SN通知给第二网络设备，以及每一个上行数据包的HFN通知给第二网络设备。
又或者，若在路径切换之前所述终端设备释放与第一网络设备之间的连接的情况下，第一网络设备可以将上行数据包转发给第二网络设备；同时，第一网络设备将每一个上行数据包的SN通知给第二网络设备，以及前N个上行数据包的HFN通知给第二网络设备。需要理解的是，这种情况下，仅发送前N个上行数据包的HFN时，第二网络设备可以基于前N个上行数据包的HFN推测得到其余上行数据包的的HFN。N为大于等于1的整数
再或者，若在路径切换之前所述终端设备释放与第一网络设备之间的连接的情况下，第一网络设备可以将上行数据包转发给第二网络设备；同时，将前N个上行数据包的SN和HFN通知给第二网络设备。需要理解的是，这种情况下，仅发送前N个上行数据包的HFN时，第二网络设备可以基于前N个上行数据包的SN以及HFN推测得到其余上行数据包的的SN以及HFN。
针对下行数据：
若满足第二预设条件，则第一网络设备转发下行数据包给第二网络设备，和/或所述第一网络设备向所述第二网络设备发送针对所述终端设备的下行数据包的发送的状态报告。其中，所述下行数据包，包括待传输的下行数据包和/或未收到正确反馈的下行数据包。
具体可以存在以下两种情况：
情况一、若在路径切换之前所述终端设备释放与第一网络设备之间的连接，则第一网络设备转发下行数据包给第二网络设备。
其中，所述第二预设条件，包括以下至少之一：
终端设备对第二网络设备的随机接入完成；也就是说，在确定终端设备与目标小区完成随机接入的时候，可以认为终端设备完成释放；
所述第一网络设备收到第二网络设备或者终端设备发送的转发下行数据包的指示信息；这种情况，可以为终端设备已经完成随机接入，然后向第一网络设备发送该指示信息，或者，第二网络设备确定终端设备已经完成随机接入，然后第二网络设备向第一网络设备发送指示其转发下行数据包的信息；
所述终端设备由第一网络设备至第二网络设备的路径切换完成；也就是说，终端设备完成随机接入，并且已经完成路径切换；
所述终端设备释放与第一网络设备的连接；同样的，终端设备在完成随机接入之后，可以释放与第一网络设备之间的上行连接以及下行连接。
所述第一网络设备将待传输的下行数据包和/或未收到正确反馈的下行数据包转发至第二网络设备时，所述方法还包括以下至少之一：
所述第一网络设备向所述第二网络设备转发至少一个下行数据包的序列号SN；
所述第一网络设备向所述第二网络设备转发至少一个下行数据包的超帧号HFN；
所述第一网络设备向所述第二网络设备转发至少一个下行数据包的序列号SN以及超帧号HFN。
也就是说，若在路径切换之前所述终端设备释放与第一网络设备之间的连接的情况下，第一网络设备可以将下行数据包转发给第二网络设备，同时，仅将每一个下行数据包的SN通知给第二网络设备。
或者，若在路径切换之前所述终端设备释放与第一网络设备之间的连接的情况下， 第一网络设备可以将下行数据包转发给第二网络设备；同时，第一网络设备将每一个下行数据包的SN通知给第二网络设备，以及每一个下行数据包的HFN通知给第二网络设备。
又或者，若在路径切换之前所述终端设备释放与第一网络设备之间的连接的情况下，第一网络设备可以将下行数据包转发给第二网络设备；同时，第一网络设备将每一个下行数据包的SN通知给第二网络设备，以及前N个下行数据包的HFN通知给第二网络设备。需要理解的是，这种情况下，仅发送前N个下行数据包的HFN时，第二网络设备可以基于前N个下行数据包的HFN推测得到其余下行数据包的的HFN。N为大于等于1的整数
再或者，若在路径切换之前所述终端设备释放与第一网络设备之间的连接的情况下，第一网络设备可以将下行数据包转发给第二网络设备；同时，将前N个下行数据包的SN和HFN通知给第二网络设备。需要理解的是，这种情况下，仅发送前N个下行数据包的HFN时，第二网络设备可以基于前N个下行数据包的SN以及HFN推测得到其余未收到正确反馈的下行数据包的的SN以及HFN。
再进一步地，前述第一网络设备向第二网络设备转发未收到正确反馈的下行数据包，可以为：从第一个未收到正确反馈的下行数据包开始转发；或者，仅将未收到正确反馈的下行数据包进行转发。
前述两种情况的区别在于，从第一个未收到正确反馈的下行数据包开始转发，举例来说，如果当前存在下行数据包1、2、3、5、6、7，其中，下行数据包3、6未收到正确反馈，那么第一网络设备从下行数据包3开始进行转发，转发的数据包包括有下行数据包3、5、6、7；此时不论下行数据包3之后的其他数据包是否收到正确反馈，都进行转发。
仅将未收到正确反馈的下行数据包进行转发，则指的是如果下行数据包收到正确反馈，则可以不进行转发。举例来说，如果当前存在下行数据包1、2、3、5、6、7，其中，下行数据包3、6未收到正确反馈，那么第一网络设备仅向第二网络设备转发下行数据包3、6；此时不论下行数据包3之后的其他数据包是否收到正确反馈，都进行转发。
可选地，此时，所述第二网络设备通知终端设备发送用于指示终端设备的下行接收状态的下行状态报告。相应的，终端设备可以基于前述通知，生成指示自身的下行接收状态的下行状态报告，并且向第二网络设备发送下行状态报告；第二网络设备可以基于终端设备的下行状态报告，确定向终端设备下发数据。
也就是第二网络设备可以基于终端设备发来的下行状态报告向终端设备发送下行数据。
本情况中，还可以向第二网络设备发送针对所述终端设备的下行数据包的发送的状态报告。
情况二、若在路径切换之后所述终端设备释放与第一网络设备之间的连接，所述第一网络设备向所述第二网络设备发送针对所述终端设备的下行数据包的发送的状态报告。
又或者，若在路径切换之后所述终端设备释放与第一网络设备之间的连接，所述第二网络设备基于终端设备上报的下行状态报告确定终端设备的下行接收状态。此时，第一网络设备可以不进行任何数据的转发。
可见，通过采用上述方案，在进行第一类切换的过程中，第一网络设备可以向第二网络设备转发上行接收状态报告，并且触发第一网络设备或第二网络设备的上行锚点的转换，并且通过上行锚点的转换来控制哪个网络设备进行上行数据的递交。从而，解决了在第一类切换中第一网络设备数据转发与上行锚点切换的问题，也解决了第一网络设 备在切换完成后进行二次数据转发以及状态报告更新。
本发明实施例提供了一种网络设备，如图7所示，包括：
第一处理单元71，执行针对终端设备的第一类切换的过程中，若满足第一预设条件，则通过第一通信单元向所述第二网络设备转发所述终端设备的上行接收状态报告，以及触发所述第一网络设备由上行锚点转换为非上行锚点；其中，所述上行锚点用于将上行数据递交至上层；
第一通信单元72，用于向所述第二网络设备转发所述终端设备的上行接收状态报告。
相应的，本实施例提供的一种网络设备，如图8所示，包括：
第二处理单元81，执行针对终端设备的第一类切换的过程中，通过第二通信单元接收第一网络设备转发的所述终端设备的上行接收状态报告，以及触发所述第二网络设备转换为上行锚点；
第二通信单元82，接收第一网络设备转发的所述终端设备的上行接收状态报告。
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连接的切换。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连接的设备。
结合以下几种示例对本实施例提供的方案进行详细说明：
在一种示例中，进行上行数据转发的处理以及上行锚点转换的处理为在接收到第二网络设备的切换请求反馈或者转发切换命令给终端设备之后开始。
终端设备基于网络配置执行测量并在条件满足时上报测量报告；
第一网络设备的第一处理单元71基于测量报告确定目标基站，并通过第一通信单元72向第二网络设备发送切换请求；
第一网络设备通过第一通信单元72收到第二网络设备的第二通信单元82的切换请求反馈并转发切换命令给终端设备；
第一网络设备通过第一通信单元72向第二网络设备的第二通信单元82开始数据转发；
这里，第一网络设备向第二网络设备开始数据转发可以为在满足预设条件的情况下开始执行。
其中，所述第一预设条件可以包括以下至少之一：
所述第一网络设备接收到第二网络设备发送的切换请求反馈；
所述第一网络设备向终端设备发送切换命令。
所述第一预设条件还可以包括以下至少之一：上行链路由第一网络设备转换到第二网络设备；
终端设备在随机接入成功后基于第二网络设备的调度发送第一条上行数据。
再进一步地，本步骤中，进行转发的内容可以为：所述第一网络设备向所述第二网络设备转发所述终端设备的上行接收状态报告；
所述第一网络设备向所述第二网络设备转发成功接收的上行数据。
在所述第一网络设备向所述第二网络设备转发所述终端设备的上行接收状态报告时，并且在所述第一网络设备向所述第二网络设备转发成功接收的上行数据之前，所述第一网络设备作为上行锚点，通过第一通信单元72将成功接收的上行数据按序递交上 层。
其中，上行锚点的功能可以包括：接收到终端设备发送的上行数据，将所述上行数据按序递交上层(Upper Layer)，也就是按序递交至核心网。
在所述终端设备向第二网络设备发起随机接入的过程中，所述第一网络设备通过第一通信单元72与所述终端设备保持上下行数据传输，将成功接收到的上下行数据转发至第二网络设备的第二通信单元82；所述第二网络设备的第二通信单元82接收第一网络设备发来的成功接收到的上下行数据，将成功接收到的上下行数据按照顺序递交上层。
其中，所述上下行数据可以为PDCP(Packet Data Convergence Protocol)分组数据汇聚协议SDU(service Data Unit，服务数据单元)。
当终端设备成功接入第二网络设备后，比如成功发送了RRC重配完成消息，终端设备的上行链路由第一网络设备切换至第二网络设备。
当满足释放条件时，终端设备释放第一网络设备的连接。
在终端设备释放第一网络设备的连接中，还可以存在以下两种情况：
情况一、若在路径切换之前所述终端设备释放与第一网络设备之间的连接，则所述第一网络设备通过第一通信单元72将待传输的下行数据包和/或未收到正确反馈的下行数据包转发至第二网络设备。
所述第一网络设备将待传输的下行数据包和/或未收到正确反馈的下行数据包转发至第二网络设备时，
所述第一网络设备通过第一通信单元72向所述第二网络设备转发未收到正确反馈的下行数据包的序列号SN；或者，所述第一网络设备通过第一通信单元72向所述第二网络设备转发未收到正确反馈的下行数据包的序列号SN以及超帧号HFN。
其中，所述第一通信单元72执行以下至少之一：
向所述第二网络设备转发未收到正确反馈的前N个下行数据包的SN以及HFN；其中，N为大于等于1的整数；
向所述第二网络设备转发未收到正确反馈的每一个下行数据包的SN，以及未收到正确反馈前N个下行数据包的HFN；
向所述第二网络设备转发未收到正确反馈的每一个下行数据包的SN以及HFN。
情况二、若在路径切换之后所述终端设备释放与第一网络设备之间的连接，所述第一网络设备通过第一通信单元72向所述第二网络设备发送针对所述终端设备的下行数据包的发送的反馈状态。
又或者，若在路径切换之后所述终端设备释放与第一网络设备之间的连接，所述第二网络设备的第二处理单元81基于终端设备上报的下行状态报告确定终端设备的下行接收状态。此时，第一网络设备可以不进行任何数据的转发。
另一示例，与前述示例不同在于，前述示例将上行转发以及上行锚点转换前置在切换情况反馈请求接收的时候；但是，本示例的处理中，将上行转发以及上行锚点的切换后置，放在终端设备随机接入成功后来执行。
终端设备基于网络配置执行测量并在条件满足时上报测量报告；第一网络设备的第一处理单元71基于测量报告确定第二网络设备，并通过第一通信单元72向第二网络设备发送切换请求；
第一网络设备通过第一通信单元72收到第二网络设备的切换请求反馈并转发切换命令给终端设备；
在所述终端设备向第二网络设备发起随机接入的过程中，所述第一网络设备通过第一通信单元72与所述终端设备保持上下行数据传输，将成功接收到的上下行数据包按照顺序递交上层。
当终端设备成功接入第二网络设备后，比如成功发送了RRC重配完成消息，终端设备的上行链路由第一网络设备切换至第二网络设备。
本步骤中，包含当满足预设条件时，所述第一网络设备向所述第二网络设备转发所述终端设备的上行数据，以及触发所述第一网络设备由上行锚点转换为非上行锚点。其中还包括第一网络设备向第二网络设备转发上行接收状态报告。
其中，所述预设条件与前述示例不同，包括以下至少之一：
所述第一网络设备通过第一通信单元72接收到第二网络设备在确定终端设备切换成功之后发来的指示信息；
所述第一网络设备通过第一通信单元72接收到终端设备随机接入成功之后发来的指示信息；
其中，所述指示信息用于指示第一网络设备向第二网络设备进行上行数据转发。其中，进行转发的内容与前述示例相同，这里不再赘述。
第一网络设备通过第一通信单元72转发成功接收的上行数据以及上行接收的状态报告给第二网络设备，并且所述第一网络设备停止调度上行HARQ的新传或者重传给终端设备。
当满足释放条件时，终端设备释放第一网络设备连接，在终端设备释放第一网络设备的连接中，所存在的两种情况与前一示例相同，这里不再赘述。
图9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或终端设备。图9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9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9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10是本发明实施例的芯片的示意性结构图。图10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10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11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11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 (52)

  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，若满足第一预设条件，则所述第一网络设备向所述第二网络设备转发所述终端设备的上行接收状态报告，以及触发所述第一网络设备由上行锚点转换为非上行锚点；其中，所述上行锚点用于将上行数据递交至上层。
  2. 根据权利要求1所述的方法，其中，所述方法还包括：
    若满足第一预设条件，则所述第一网络设备向所述第二网络设备转发成功接收的上行数据。
  3. 根据权利要求2所述的方法，其中，所述第一网络设备向所述第二网络设备转发成功接收的上行数据之前，所述方法还包括：
    所述第一网络设备作为上行锚点，将成功接收的上行数据按序递交上层。
  4. 根据权利要求2所述的方法，其中，所述触发所述第一网络设备由上行锚点转换为非上行锚点，还包括：
    所述第一网络设备向所述第二网络设备转发成功接收的上行数据，触发所述第一网络设备由上行锚点转换为非上行锚点，以及第二网络设备转换为上行锚点。
  5. 根据权利要求1-4任一项所述的方法，其中，所述第一预设条件，包括以下之一：
    所述第一网络设备接收到第二网络设备发送的切换请求反馈；
    所述第一网络设备向终端设备发送切换命令；
    上行链路由第一网络设备转换到第二网络设备；
    终端设备在随机接入成功后基于第二网络设备的调度发送第一条上行数据；
    所述第一网络设备接收到第二网络设备在确定终端设备切换成功之后发来的指示信息；其中，所述指示信息用于指示第一网络设备向第二网络设备进行上行数据转发；
    所述第一网络设备接收到终端设备随机接入成功之后发来的指示信息。
  6. 根据权利要求5所述的方法，其中，所述方法还包括：
    在所述终端设备向第二网络设备发起随机接入的过程中，所述第一网络设备与所述终端设备保持上下行数据传输，将成功接收到的上行数据转发至第二网络设备。
  7. 根据权利要求5所述的方法，其中，所述方法还包括：
    在所述终端设备向第二网络设备发起随机接入的过程中，所述第一网络设备与所述终端设备保持上下行数据传输，将成功接收到的上行数据按照顺序递交上层。
  8. 根据权利要求5所述的方法，其中，所述方法还包括：
    所述终端设备的上行链路由第一网络设备切换至第二网络设备和/或终端设备在随机接入完成后基于第二网络设备的调度发送第一条上行数据时，若所述第一网络设备的混合自动重传请求HARQ重传缓存中存在需要重传的上行数据，则所述第一网络设备将接收到终端设备重传的所述需要重传的上行数据转发至第二网络设备。
  9. 根据权利要求1-8任一项所述的方法，其中，所述方法还包括：
    若满足第二预设条件，则第一网络设备转发下行数据包给第二网络设备，和/或所述第一网络设备向所述第二网络设备发送针对所述终端设备的下行数据包的发送的状态报告；
    其中，所述下行数据包，包括待传输的下行数据包和/或未收到正确反馈的下行数据包。
  10. 根据权利要求9所述的方法，其中，所述第二预设条件，包括以下至少之一：
    终端设备对第二网络设备的随机接入完成；
    所述第一网络设备收到第二网络设备或者终端设备发送的转发下行数据包的指示信息；
    所述终端设备由第一网络设备至第二网络设备的路径切换完成；
    所述终端设备释放与第一网络设备的连接。
  11. 根据权利要求9所述的方法，其中，所述第一网络设备将下行数据包转发至第二网络设备时，所述方法还包括以下至少之一：
    所述第一网络设备向所述第二网络设备转发至少一个下行数据包的序列号SN；
    所述第一网络设备向所述第二网络设备转发至少一个下行数据包的超帧号HFN；
    所述第一网络设备向所述第二网络设备转发至少一个下行数据包的序列号SN以及超帧号HFN。
  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第一网络设备以及第二网络设备之间的协议栈的切换。
  13. 一种切换处理方法，所述方法包括：
    第二网络设备执行针对终端设备的第一类切换的过程中，接收第一网络设备转发的所述终端设备的上行接收状态报告，以及触发所述第二网络设备转换为上行锚点；
    其中，所述上行锚点用于将上行数据递交至上层。
  14. 根据权利要求13所述的方法，其中，所述方法还包括：接收第一网络设备转发的所述终端设备成功接收的上行数据。
  15. 根据权利要求14所述的方法，其中，所述触发所述第二网络设备 转换为上行锚点，还包括：
    所述第二网络设备接收所述第一网络设备转发的成功接收的上行数据，触发所述第二网络设备转换为上行锚点。
  16. 根据权利要求15所述的方法，其中，所述触发所述第二网络设备转换为上行锚点之后，所述方法还包括：
    所述第二网络设备作为上行锚点，将接收到的上行数据按序递交上层。
  17. 根据权利要求13-16任一项所述的方法，其中，所述方法还包括：
    所述第二网络设备接收第一网络设备转发的下行数据包；
    其中，所述下行数据包，包括：待传输的下行数据包和/或未收到正确反馈的下行数据包。
  18. 根据权利要求17所述的方法，其中，所述第二网络设备接收第一网络设备转发的下行数据包时，
    所述方法还包括以下至少之一：
    所述第一网络设备向所述第二网络设备转发至少一个下行数据包的序列号SN；
    所述第一网络设备向所述第二网络设备转发至少一个下行数据包的超帧号HFN；
    所述第一网络设备向所述第二网络设备转发至少一个下行数据包的序列号SN以及超帧号HFN。
  19. 根据权利要求17或18所述的方法，其中，所述方法还包括：
    所述第二网络设备通知终端设备发送用于指示终端设备的下行接收状态的下行状态报告。
  20. 根据权利要求13-19任一项所述的方法，其中，所述方法还包括：
    所述第二网络设备接收所述第一网络设备发送的针对所述终端设备的下行数据包的发送的反馈状态；
    或者，
    所述第二网络设备基于终端设备上报的下行状态报告确定终端设备的下行接收状态。
  21. 根据权利要求13-20任一项所述的方法，其中，所述方法还包括：
    在所述终端设备向第二网络设备发起随机接入的过程、并且所述第一网络设备与所述终端设备保持上下行数据传输时，所述第二网络设备接收第一网络设备发来的成功接收到的上下行数据，将成功接收到的上下行数据按照顺序递交上层。
  22. 根据权利要求13所述的方法，其中，所述方法还包括：
    所述终端设备的上行链路由第一网络设备切换至第二网络设备和/或终端设备在随机接入成功后基于第二网络设备的调度发送第一条上行数据时，所述第二网络设备接收所述第一网络设备转发的终端设备重传的上行数据。
  23. 根据权利要求13-22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第一网络设备以及第二网络设备之间的协议栈的切换。
  24. 一种网络设备，包括：
    第一处理单元，执行针对终端设备的第一类切换的过程中，若满足第一预设条件，则通过第一通信单元向所述第二网络设备转发所述终端设备的上行接收状态报告，以及触发所述第一网络设备由上行锚点转换为非上行锚点；其中，所述上行锚点用于将上行数据递交至上层；
    第一通信单元，向所述第二网络设备转发所述终端设备的上行接收状态报告。
  25. 根据权利要求24所述的网络设备，其中，所述第一处理单元，若满足第一预设条件，则通过第一通信单元向所述第二网络设备转发成功接收的上行数据。
  26. 根据权利要求25所述的网络设备，其中，所述第一处理单元，在向所述第二网络设备转发成功接收的上行数据之前，作为上行锚点，将成功接收的上行数据按序递交上层。
  27. 根据权利要求25所述的网络设备，其中，所述第一处理单元，在所述第一网络设备向所述第二网络设备转发成功接收的上行数据时，触发所述第一网络设备由上行锚点转换为非上行锚点，以及第二网络设备转换为上行锚点。
  28. 根据权利要求24-27任一项所述的网络设备，其中，所述第一预设条件，包括以下之一：
    所述第一网络设备接收到第二网络设备发送的切换请求反馈；
    所述第一网络设备向终端设备发送切换命令；
    上行链路由第一网络设备转换到第二网络设备；
    终端设备在随机接入成功后基于第二网络设备的调度发送第一条上行数据；
    所述第一网络设备接收到第二网络设备在确定终端设备切换成功之后发来的指示信息；其中，所述指示信息用于指示第一网络设备向第二网络设备进行上行数据转发；
    所述第一网络设备接收到终端设备随机接入成功之后发来的指示信息。
  29. 根据权利要求28所述的网络设备，其中，所述第一通信单元，在所述终端设备向第二网络设备发起随机接入的过程中，与所述终端设备保持上下行数据传输，将成功接收到的上行数据转发至第二网络设备。
  30. 根据权利要求28所述的网络设备，其中，所述第一通信单元，在所述终端设备向第二网络设备发起随机接入的过程中，与所述终端设备保持上下行数据传输，将成功接收到的上行数据包按照顺序递交上层。
  31. 根据权利要求28所述的网络设备，其中，所述第一通信单元，所述终端设备的上行链路由第一网络设备切换至第二网络设备和/或终端设备 在随机接入完成后基于第二网络设备的调度发送第一条上行数据时，若所述第一网络设备的HARQ重传缓存中存在需要重传的上行数据，则将接收到终端设备重传的所述需要重传的上行数据转发至第二网络设备。
  32. 根据权利要求24-31任一项所述的网络设备，其中，所述第一通信单元，若满足第二预设条件，则转发下行数据包给第二网络设备，和/或向所述第二网络设备发送针对所述终端设备的下行数据包的发送的状态报告；
    其中，所述下行数据包，包括待传输的下行数据包和/或未收到正确反馈的下行数据包。
  33. 根据权利要求32所述的网络设备，其中，所述第二预设条件，包括以下至少之一：
    终端设备对第二网络设备的随机接入完成；
    所述第一网络设备收到第二网络设备或者终端设备发送的转发下行数据包的指示信息；
    所述终端设备由第一网络设备至第二网络设备的路径切换完成；
    所述终端设备释放与第一网络设备的连接。
  34. 根据权利要求32所述的网络设备，其中，所述第一通信单元，执行以下至少之一：
    向所述第二网络设备转发至少一个下行数据包的序列号SN；
    向所述第二网络设备转发至少一个下行数据包的超帧号HFN；
    向所述第二网络设备转发至少一个下行数据包的序列号SN以及超帧号HFN。
  35. 根据权利要求24-34任一项所述的网络设备，其中，所述第一类切换为：在切换过程中终端设备保持与第一网络设备以及第二网络设备之间的协议栈的切换。
  36. 一种网络设备，包括：
    第二处理单元，执行针对终端设备的第一类切换的过程中，通过第二通信单元接收第一网络设备转发的所述终端设备的上行接收状态报告，以及触发所述第二网络设备转换为上行锚点；
    第二通信单元，接收第一网络设备转发的所述终端设备的上行接收状态报告。
  37. 根据权利要求36所述的网络设备，其中，所述第二通信单元，接收第一网络设备转发的所述终端设备成功接收的上行数据。
  38. 根据权利要求37所述的网络设备，其中，所述第二处理单元，
    通过第二通信单元接收所述第一网络设备转发的成功接收的上行数据，触发所述第二网络设备转换为上行锚点。
  39. 根据权利要求38所述的网络设备，其中，所述第二处理单元，作为上行锚点，通过第二通信单元将接收到的上行数据按序递交上层。
  40. 根据权利要求36-39任一项所述的网络设备，其中，所述第二通信 单元，接收第一网络设备转发的下行数据包；
    其中，所述下行数据包，包括：待传输的下行数据包和/或未收到正确反馈的下行数据包。
  41. 根据权利要求40所述的网络设备，其中，所述第二通信单元，执行以下至少之一：
    所述第一网络设备向所述第二网络设备转发至少一个下行数据包的序列号SN；
    所述第一网络设备向所述第二网络设备转发至少一个下行数据包的超帧号HFN；
    所述第一网络设备向所述第二网络设备转发至少一个下行数据包的序列号SN以及超帧号HFN。
  42. 根据权利要求40或41所述的网络设备，其中，所述第二通信单元，通知终端设备发送用于指示终端设备的下行接收状态的下行状态报告。
  43. 根据权利要求36-42任一项所述的网络设备，其中，所述第二通信单元，接收所述第一网络设备发送的针对所述终端设备的下行数据包的发送的反馈状态；
    或者，
    第二处理单元，基于终端设备上报的下行状态报告确定终端设备的下行接收状态。
  44. 根据权利要求36-42任一项所述的网络设备，其中，所述第二通信单元，在所述终端设备向第二网络设备发起随机接入的过程、并且所述第一网络设备与所述终端设备保持上下行数据传输时，接收第一网络设备发来的成功接收到的上下行数据，将成功接收到的上下行数据按照顺序递交上层。
  45. 根据权利要求36-44任一项所述的网络设备，其中，所述第一类切换为：在切换过程中终端设备保持与第一网络设备以及第二网络设备之间的协议栈的切换。
  46. 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1-12任一项所述方法的步骤。
  47. 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13-23任一项所述方法的步骤。
  48. 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。
  49. 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13-23中任一项所述的方法。
  50. 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1-23任一项所述方法的步骤。
  51. 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1-23中任一项所述的方法。
  52. 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1-23中任一项所述的方法。
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