WO2020147680A1 - 通信方法和网络设备 - Google Patents

通信方法和网络设备 Download PDF

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Publication number
WO2020147680A1
WO2020147680A1 PCT/CN2020/071788 CN2020071788W WO2020147680A1 WO 2020147680 A1 WO2020147680 A1 WO 2020147680A1 CN 2020071788 W CN2020071788 W CN 2020071788W WO 2020147680 A1 WO2020147680 A1 WO 2020147680A1
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WIPO (PCT)
Prior art keywords
network device
default drb
drb
default
message
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PCT/CN2020/071788
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English (en)
French (fr)
Inventor
胡星星
彭文杰
张宏平
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to NZ778851A priority Critical patent/NZ778851A/en
Priority to CA3126572A priority patent/CA3126572A1/en
Priority to EP20740923.6A priority patent/EP3905763A4/en
Publication of WO2020147680A1 publication Critical patent/WO2020147680A1/zh
Priority to US17/375,752 priority patent/US20210345182A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0268—Traffic management, e.g. flow control or congestion control using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0252—Traffic management, e.g. flow control or congestion control per individual bearer or channel
    • H04W28/0257—Traffic management, e.g. flow control or congestion control per individual bearer or channel the individual bearer or channel having a maximum bit rate or a bit rate guarantee

Definitions

  • This application relates to the field of communication technology, in particular to communication methods and network equipment.
  • the QoS architecture can be shown in Figure 1.
  • the QoS architecture takes QoS flow as the basic granularity of QoS control, and introduces two-level QoS mapping.
  • the non-access stratum (NAS) maps data packets with the same QoS requirements to a QoS flow, and then
  • the access layer maps the QoS flow to the data radio bearer (DRB) to meet different QoS requirements.
  • DRB data radio bearer
  • the core network device and the terminal device realize service interaction through a session.
  • Each session can include one or more QoS flows.
  • each QoS flow can be identified by QoS flow identification.
  • the mapping between downlink data packets with the same QoS requirements and downstream QoS flows can be implemented by core network equipment, and the mapping between uplink data packets with the same QoS requirements and upstream QoS flows can be implemented by terminal equipment .
  • the terminal device can be notified by the network device, or the mapping relationship can be configured in the terminal device in advance, so that the terminal device can realize the mapping between the uplink data packet with the same QoS requirement and the uplink QoS flow.
  • the mapping between the upstream and downstream QoS flows and the DRB can be implemented by network equipment.
  • the network device may notify the mapping rule between the uplink QoS flow and the DRB through a radio resource control (Radio Resource Control, RRC) message, so that the terminal device can learn the mapping rule between the uplink QoS flow and the DRB.
  • RRC Radio Resource Control
  • the terminal device can also learn the upstream QoS flow and DRB based on reflection mapping.
  • the reflection mapping here means that for each DRB, the UE monitors the QoS flow identifier of the downlink data packet, and then maps the uplink data packet of the QoS flow to the same DRB, that is, the terminal equipment maps the downlink QoS flow to the DRB The relationship obtains the mapping relationship from the upstream QoS flow to the DRB.
  • a session can also correspond to a default DRB. If the QoS flow corresponding to an uplink data packet is not configured with the mapping relationship between QoS flow and DRB, that is, the network device does not notify the mapping relationship between QoS flow and DRB through the RRC message, and the terminal device also uses reflection mapping. When the mapping relationship between the QoS flow and the DRB cannot be obtained, the terminal device will map the packet of the QoS flow to the default DRB.
  • the default DRB corresponding to each session can be configured by the network device between the core network device and the terminal device to which the session belongs.
  • a terminal device can establish connections and communicate with multiple network devices at the same time, that is, between the core network device and the terminal device and simultaneously communicate with There are multiple network devices connected by a terminal device. If these multiple network devices establish a default DRB for the same session of the terminal device, one session may correspond to multiple default DRBs, which causes the terminal device to be unable to perform uplink transmission. Determine which DRB should be mapped to the upstream QoS flow that belongs to the session and that has not yet configured the correspondence between DRB and QoS flow.
  • DC dual connectivity
  • This application provides a communication method and a network device to solve the problem that one session corresponds to multiple default DRBs in a dual-connection or multi-connection scenario.
  • a communication method which can be applied to network equipment, including:
  • the first network device receives the first message sent by the second network device.
  • the first message is used to notify the first network device whether the default DRB is configured.
  • the first network device and the second network device provide multiple connections for the same terminal device The serving network device; the first network device determines whether the first network device configures the default DRB according to the first message.
  • the first network device and the second network device provide multiple connection services for the same terminal device, indicating that the first network device and the second network device are network devices in a dual-connection or multi-connection scenario.
  • the second network device in the multi-connection scenario sends a message for notifying the first network device whether to configure the default DRB to the first network device in the dual-connection or multi-connection scenario, and the first network device can determine whether to establish according to the first message
  • the default DRB enables multiple network devices in dual-connection or multi-connection scenarios to negotiate the configuration of a default DRB, which can prevent multiple network devices in dual-connection or multi-connection scenarios from configuring the default DRB for a session at the same time appear.
  • the second network device may transfer the decision to configure the default DRB to the first network device, and the first network device may configure the default DRB.
  • the first network device configures the default DRB:
  • the first message includes a first DRB configuration instruction, which is used to instruct the first network device to configure the default DRB; accordingly, the first network device determines whether the first network device configures the default DRB according to the first message
  • the DRB may include: the first network device determines to configure the default DRB according to the first DRB configuration instruction.
  • the first message includes a second DRB configuration indication
  • the second DRB configuration indication is an indication indicating whether the first network device is configured with the default DRB; accordingly, the first network device determines whether the first network device is configured according to the first message
  • Configuring the default DRB may include: in a case where the second DRB configuration instruction indicates that the first network device configures the default DRB, the first network device determines to configure the default DRB according to the second DRB configuration instruction.
  • the first message includes the first DRB configuration status indication, which is used to indicate that the second network device is not configured with the default DRB; accordingly, the first network device determines the first network device according to the first message Whether to configure the default DRB may include: the first network device determines to configure the default DRB according to the first DRB configuration indication.
  • the first message includes the second DRB configuration indication
  • the second DRB configuration indication is an indication indicating whether the second network device has configured the default DRB; accordingly, the first network device determines the first Whether the network device configures the default DRB may include: when the second DRB configuration condition indication indicates that the second network device is not configured with the default DRB, the first network device determines to configure the default DRB according to the second DRB configuration condition indication.
  • the first message includes the first indication
  • the first indication is used to indicate that the first QoS flow is carried by the first network device
  • the first QoS flow is the QoS flow of the first session
  • the first session corresponds to the default DRB
  • the first network device to determine whether the first network device configures the default DRB according to the first message may include: the first network device determines to configure the default DRB according to the first instruction.
  • the first QoS flow may be the QoS flow with the highest frequency among the QoS flows of the first session.
  • the first message includes a second indication, which is used to indicate that all QoS flows of the first session are carried by the first network device, and the first session is the session corresponding to the default DRB; accordingly, the first network
  • the device determining whether the first network device configures the default DRB according to the first message may include: the first network device determines to configure the default DRB according to the second instruction.
  • the first message includes a third indication.
  • the third indication is used to instruct the second network device to transfer the first default DRB configured for the first session to the first network device and all QoS flows carried by the first default DRB are transferred to the first network device.
  • the first network device carries the load, and the first session is the session corresponding to the default DRB; accordingly, the first network device determining whether the first network device configures the default DRB according to the first message may include: the first network device determines the configuration according to the third instruction The default DRB.
  • the first network device may also decide not to configure the default DRB. That is, in the above case, the first network device The determining according to the first message whether the first network device configures the default DRB may also be: the first network device determines according to the first message that the default DRB is not configured.
  • the first network device may also decide when to configure the default DRB, that is, in several cases, the first network device determines whether the first network device is configured according to the first message After the default DRB, it may also include: the time when the first network device determines to configure the default DRB.
  • the second network device can make the decision to configure the default DRB to be handed over to the first network device to complete the negotiation on the configuration of the default DRB.
  • the method further includes: the first network device receives the first network device sent by the second network device Two messages, the second message is used to inform the first network device that part of the QoS flow of the first session is carried by the second network device; in the case that the default DRB has been configured, the first network device cancels the configuration of the default DRB according to the second message .
  • the first network device cancels the configuration of the default DRB according to the second message .
  • the method further includes: after the default DRB is configured, the first network device releases In the case of the default DRB, the first network device sends a release instruction to the second network device, where the release instruction is used to indicate that the first network device has released the default DRB. After the default DRB is released, the first network device notifies the second network device so that the second network device can reconfigure the default DRB.
  • the method further includes: after configuring the default DRB, the first network device sets the default DRB The configuration information is sent to the terminal device.
  • the terminal device can determine the configuration of the default DRB.
  • the terminal device can map the uplink QoS flow that has not configured the correspondence between the DRB and the QoS flow to The default DRB.
  • the second network device may not transfer the decision to configure the default DRB to the first network device, and in the case of not transferring the decision to configure the default DRB to the first network device Next, the second network device notifies the first network device not to configure the default DRB, and the first network device does not configure the default DRB.
  • the following situations may occur:
  • the first message includes a third DRB configuration instruction, which is used to instruct the first network device not to configure the default DRB; accordingly, the first network device determines whether the first network device is configured according to the first message
  • the default DRB may include: the first network device determines not to configure the default DRB according to the third DRB configuration instruction.
  • the first message includes the third DRB configuration status indication
  • the third DRB configuration status indication is used to indicate that the first network device has configured the default DRB; accordingly, the first network device determines the first Whether the network device configures the default DRB may include: the first network device determines not to configure the default DRB according to the third DRB configuration indication.
  • the method further includes: the first network device sends a third message to the second network device ,
  • the third message is used to indicate that the first network device has not configured the default DRB or the first network device has configured the default DRB.
  • the first network device sends an instruction to the second network device to indicate whether the first network device is configured with the default DRB, so that the second network device can determine that the first network device configures the default DRB.
  • the third message includes the reason why the first network device is not configured with the default DRB.
  • the first network device is the main network device, and the second network device is the auxiliary network device; or, the first network device is the auxiliary network device, and the second network device is It is the main network device.
  • a method for configuring a default data radio bearer is provided, which can be applied to a network device, including: if the first network device is the main network device, the first network device determines to configure the default DRB, and the first network device is a terminal device Provide communication services.
  • the first network device determines not to configure the default DRB.
  • a network device for executing the communication method described in the first aspect or the method for configuring a default data radio bearer described in the second aspect.
  • the network device may include: a memory and a processor coupled to the memory, wherein: the memory is used to store the program code of the communication method described in the first aspect or the method for configuring the default data radio bearer described in the second aspect, and the processing The device is used to execute the program code stored in the memory, that is, execute the method provided in the first aspect, or the method provided in any of the possible situations of the first aspect, or the method provided in the second aspect , Or the method provided in any of the possible situations in the second aspect above.
  • the network device may include multiple functional modules for correspondingly executing the method provided in the first aspect, or any one of the possible situations in the first aspect.
  • a computer-readable storage medium stores instructions that, when run on a computer, cause the computer to execute the communication method described in the first aspect or the communication method described in the second aspect. The method of configuring the default data radio bearer.
  • a computer program product containing instructions which when run on a computer, causes the computer to execute the communication method described in the first aspect or the method for configuring a default data radio bearer described in the second aspect.
  • Figure 1 is a schematic diagram of a QoS architecture with QoS flow as the basic granularity of QoS control
  • FIG. 2 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • Figure 5 is a schematic structural diagram of a network device provided by this application.
  • Fig. 6 is a functional block diagram of a communication system and network equipment provided by the present application.
  • FIG. 2 is a schematic diagram of the architecture of a communication system provided by the present application.
  • the communication system 20 may be composed of a core network device 201 and a network device 202.
  • the network device 202 is used to provide communication services for terminal devices.
  • the core network device 201 is used to provide service support and perform service control for the network device 202.
  • the communication system includes but is not limited to: a 5G mobile communication system and a future communication system.
  • the core network device 201 may include access and mobility function (AMF) network elements, session management function (SMF) network elements, and user plane functions (user plane).
  • AMF access and mobility function
  • SMF session management function
  • UPF user plane functions
  • AMF and SMF are network elements located in the control plane of the core network.
  • AMF and SMF can be used to process control plane signaling, and AMF and network equipment can complete control plane signaling interaction through N2 connections.
  • UPF is a network element located on the user plane of the core network. UPF can be used to process user plane data. UPF and network equipment can complete user plane data interaction through an N3 connection.
  • the network device 202 is a device deployed in a wireless access network to provide a wireless communication function for a terminal device.
  • the network device can perform wireless communication with the terminal device through a wireless transmission medium in a wireless transmission space.
  • the network device 202 may include various forms of macro base stations, micro base stations (also referred to as small stations), relay stations, access points, transmission receiver points (TRP), and so on.
  • TRP transmission receiver points
  • the names of network devices may be different.
  • network devices are called generation Node B (gNB), and network devices can also be connected Evolved universal terrestrial radio access network Node B (eNB), etc. to the evolution of the 5G core network.
  • gNB generation Node B
  • eNB Evolved universal terrestrial radio access network Node B
  • devices that provide wireless communication functions for terminal devices are collectively referred to as network devices.
  • the network device 202 may include multiple network devices that provide dual-connection services or multiple-connection services for the same terminal device, where the same terminal device provides dual-connection services or multiple Multiple network devices connected to the service mean that the multiple network devices establish connections and communicate with the same terminal device at the same time, so as to use the resources of the multiple network devices to provide communication services for the terminal device.
  • the multiple network devices and the terminal The connection of the device constitutes a dual connection or multiple connection.
  • the multiple network devices that provide multi-connection services for the same terminal device may include two types of network devices, one is a network device connected to the core network device with a control plane, and the core network device is connected with a control plane. The device can be called the main network device.
  • the network device connected to the core network device with a control plane may be a network device connected to the AMF, such as the network device 2021 in FIG. 2.
  • the other is a network device that does not have a control plane connection with the core network device, and a device that has no control plane connection with the core network device can be called an auxiliary network device.
  • the network device that has no control plane connection with the core network device may be a network device that is not connected to the AMF, such as the network device 2022 in FIG. 2.
  • the network equipment that has a control plane connection to the core network device and the network device that is not connected to the core network device are for the same terminal device, and the network device that has no control plane connection to the core network It can be a network device that has a control plane connection to the core network device corresponding to other terminal devices.
  • the network device 2022 shown in FIG. 2 provides wireless communication functions for other terminal devices other than the terminal device shown in FIG.
  • the network device 2022 can be connected to the AMF through the N2 connection to become a network device with a control plane to the core network device, that is, to become a network device with a control plane connection to the core network device corresponding to the other terminal device.
  • multiple network devices that provide dual connection services or multiple connection services for the same terminal device may be network devices that provide the same wireless access standard, or network devices that provide different wireless access standards.
  • one is a network device that provides wireless new radio (NR) access
  • the other is a network device that provides evolved universal terrestrial radio access (E-UTRA).
  • NR wireless new radio
  • E-UTRA evolved universal terrestrial radio access
  • one of the multiple network devices that has a dual connection relationship or a multiple connection relationship with the terminal device sends a message informing other network devices of the multiple network devices whether the other network device is configured with a default DRB. , So that the other network device can determine whether to configure the default DRB according to the message, so as to complete the negotiation on the configuration of the default DRB among multiple network devices, and avoid multiple network devices from establishing multiple default DRBs for the same session.
  • the first session is a session of a terminal device that has a dual-connection or multi-connection relationship with multiple network devices.
  • FIG. 3 is a schematic flowchart of a communication method provided by an embodiment of the present application, which is introduced from the perspective of interaction.
  • the method may include but is not limited to the following steps:
  • Step S301 The second network device sends a first message to the first network device, where the first message is used to notify the first network device whether the default DRB is configured, and the first network device receives the first message.
  • Step S302 The first network device determines whether the first network device is configured with a default DRB according to the first message.
  • the second network device and the first network device involved in the above step S301 and step S302 are network devices that provide multiple connection services for the same terminal device.
  • the second network device may be the main network device, and the first network device may be the auxiliary network device; or, the first network device may be the main network device, and the second network device may be the auxiliary network device.
  • the concepts of network equipment, primary network equipment, and auxiliary network equipment that provide multiple connection services for the same terminal equipment refer to the foregoing description.
  • the default DRB involved in the above steps S301 and S302 is the DRB used to carry the second QoS flow, and the second QoS flow may be an uplink QoS flow in the first session for which the mapping relationship with the DRB has not been configured.
  • a session can be understood as an association between a terminal device and a data network (data network, DN) established to implement one service or multiple services, where the DN provides services for the terminal device.
  • DN data network
  • the name of the session may be different.
  • the session is called a protocol data unit (PDU) session.
  • PDU protocol data unit
  • the first message involved in steps S301 and S302 is a message that enables the first network device and the second network device to complete the negotiation of the configuration of the default DRB. After receiving the first message, the first network device can determine the default DRB Which network device is configured.
  • the first message may carry indication information
  • the indication information may be indication information that instructs the second network device to transfer the decision to configure the default DRB to the role of the first network device, according to the indication information .
  • the first network device can decide whether to configure the default DRB, so as to complete the negotiation of the configuration right of the default DRB between the first network device and the second network device.
  • the following specifically introduces the situation in which the instruction information carried in the first message can be implemented to instruct the second network device to transfer the decision to configure the default DRB to the first network device.
  • the first message may include a first DRB configuration indication, and the first DRB configuration indication is used to instruct the first network device to configure the default DRB.
  • one meaning of the first DRB configuration indication may be to allow the first network device to configure the default DRB.
  • the first network device can learn, according to the first DRB configuration instruction in the first message, that the second network device transfers the decision to configure the default DRB to the first network device, and the first network device can decide The default DRB is configured, that is, the first network device can determine to configure the default DRB according to the first DRB configuration instruction.
  • the first network device may also determine when to configure the default DRB, that is, after the first network device determines to configure the default DRB according to the first DRB configuration instruction, it also determines the time when the default DRB is configured.
  • the first network device may also decide not to configure the default DRB, that is, the first network device determines not to configure the default DRB according to the first DRB configuration instruction.
  • the first network device determines not to configure the default DRB.
  • another meaning of the above-mentioned first DRB configuration indication may also be to explicitly instruct the first network device to configure the default DRB.
  • the first network device after receiving the first message, the first network device performs the configuration according to the first DRB The configuration instruction determines to configure the default DRB. Further, after the first network device determines to configure the default DRB according to the first DRB configuration instruction, it may also determine the time when the default DRB is configured.
  • the first message includes a first DRB configuration status indication, and the first DRB configuration status indication is used to indicate that the second network device is not configured with a default DRB.
  • the first network device can learn from the first DRB configuration instruction in the message that the second network device has handed over the decision to configure the default DRB to the first network device, and the first network device can decide to configure the default DRB.
  • DRB that is, the first network device may determine to configure the default DRB according to the first DRB configuration instruction.
  • the first network device may also determine when to configure the default DRB, that is, after the first network device determines to configure the default DRB according to the first DRB configuration indication, it also determines the time when the default DRB is configured.
  • the first network device may also decide not to configure the default DRB, that is, the first network device may determine not to configure the default DRB according to the first DRB configuration instruction.
  • the first network device determines not to configure the default DRB.
  • the first message includes a first indication, the first indication is used to indicate that the first QoS flow is carried by the first network device, and the first QoS flow is the QoS flow of the first session.
  • the first network device can learn from the first indication in the first message that the second network device transfers the decision to configure the default DRB to the first network device, and the first network device can decide to configure the default DRB That is, the first network device may determine to configure the default DRB according to the first instruction. Further, after receiving the first message, the first network device may also determine when to configure the default DRB, that is, after the first network device determines to configure the default DRB according to the first instruction, it also determines the time when the default DRB is configured.
  • the first network device may also decide not to configure the default DRB, that is, the first network device may determine not to configure the default DRB according to the first instruction.
  • the first QoS flow may be a QoS flow that is different from other QoS flows in the QoS flow of the first session.
  • the first QoS flow may be the QoS flow with the highest frequency among the QoS flows of the first session.
  • the QoS flow with the highest frequency here may refer to the QoS flow with the highest possible frequency determined by a certain algorithm prediction. The actual frequency of the QoS flow with the highest frequency may not be the first session. The highest in the QoS flow.
  • the first indication may be additional QoS flow information (additional QoS flow information), which indicates that a certain QoS flow in a session is most likely to compare Other QoS flows in this session appear more frequently.
  • the first QoS flow is carried by the first network device may mean that the mapping relationship between the QoS flow corresponding to the first QoS flow and the DRB is determined by the first network device.
  • the service data adaptation protocol service data adaptation protocol, SDAP
  • the first QoS flow carried by the first network device may refer to the SDAP layer corresponding to the first QoS flow. Located in the first network device.
  • the first network may determine not to configure the default DRB.
  • the first message includes a second indication, and the second indication is used to indicate that all QoS flows of the first session are carried by the first network device.
  • the first network device can learn from the second instruction in the first message that the second network device transfers the decision to configure the default DRB to the first network device, and the first network device can decide to configure the default DRB , That is, the first network device determines to configure the default DRB according to the second instruction. Further, the first network device may also determine when to configure the default DRB, that is, after the first network device determines to configure the default DRB according to the second instruction, it also determines the time when the default DRB is configured.
  • the first network device may also decide not to configure the default DRB, that is, the first network device may determine not to configure the default DRB according to the second instruction.
  • that all QoS flows of the first session are carried by the first network device may mean that the mapping relationship between the QoS flows corresponding to all QoS flows of the first session and the DRB is determined by the first network device.
  • the SDAP layer is responsible for the mapping relationship between QoS flows and DRBs, and all QoS flows of the first session are carried by the first network device, which may mean that the SDAP layers corresponding to all QoS flows are located in the first network device.
  • the core network device notifies the second network device to add a new QoS flow in the first session and the second network device carries the new QoS flow.
  • the second network device may send a second message to the first network device to indicate whether the first network device is configured with a default DRB.
  • the second message may be used to indicate that the new QoS flow is carried by the first network device.
  • the second message may be used to notify the first network device that part of the quality flow of the first session is carried by the second network device.
  • the first network device can maintain the configuration of the default DRB . If the second message is used to notify the first network device that part of the quality flow of the first session is carried by the second network device, after receiving the second message, the second network device can be configured with the default DRB Cancel the configuration of the default DRB, that is, change the originally configured default DRB to a non-default DRB, and at the same time, cancel the decision right to configure the default DRB. The first network device may also maintain the configuration of the default DRB, and at the same time may continue to maintain the decision right to configure the default DRB.
  • the first message includes a third indication, and the third indication is used to instruct the second network device to transfer the first default DRB configured for the first session to the first network device.
  • the first network device can learn from the third indication in the first message that the second network device transfers the decision to configure the default DRB to the first network device, and the first network device can decide to configure the default DRB , That is, the first network device determines to configure the default DRB according to the third instruction. Further, the first network device may also determine when to configure the default DRB, that is, after the first network device determines to configure the default DRB according to the third instruction, it also determines the time when the default DRB is configured.
  • the first network device may also decide not to configure the default DRB, that is, the first network device may determine not to configure the default DRB according to the third instruction.
  • the third indication is used to instruct the second network device to transfer the first default DRB configured for the first session to the first network device, and all QoS flows carried by the first default DRB are carried by the first network device.
  • that all QoS flows carried by the first default DRB are carried by the first network device means that the mapping relationship between the QoS flow corresponding to the first QoS and the DRB is determined by the first network device.
  • the SDAP layer of the service data adaptation protocol is responsible for the mapping relationship between QoS flows and DRBs. All QoS flows carried by the first default DRB are carried by the first network device. This may mean that the SDAP layer corresponding to these QoS flows is located in the first network. In the device.
  • the determination by the first network device to configure the default DRB may specifically refer to: the first network device determines the first default DRB as the default DRB for the first session, that is, the first network device maintains the configuration of the first default DRB; or The first network device configures the other DRBs corresponding to the first session that are not the first default DRB as the default DRB, that is, the first network device cancels the configuration of the first default DRB, and configures the other DRB as the default DRB.
  • the first network device after the first network device maintains the configuration of the first default DRB, in the case of not receiving other messages sent by the second network device to indicate whether the first network device is configured with the default DRB, The first network device cannot configure other DRBs as default DRBs.
  • the other DRB may be configured as the default DRB.
  • the first network device determining that the default DRB is not configured may specifically refer to: the first network device cancels the configuration of the first default DRB.
  • the first network device has the configuration right of the default DRB
  • the second network device does not have the configuration right of the default DRB.
  • the second network device does not configure the default DRB.
  • the second network device does not configure the default DRB, and the decision to configure the default DRB is handed over to the first network device to complete the negotiation on the configuration rights of the default DRB, which can avoid multiple network devices at the same time in dual-connection or multi-connection scenarios.
  • the session configuration defaults to DRB.
  • the indication information carried in the second message may also be indication information that indicates that the second network device has not assigned the decision to configure the default DRB to the role of the first network device.
  • the first network device may determine not to configure the default DRB, so as to complete the negotiation on the configuration right of the default DRB between the first network device and the second network device.
  • the following specifically introduces the situation of the indication information carried in the first message that can be realized to indicate that the second network device has not handed over the decision to configure the default DRB to the first network device.
  • the first message includes a third DRB configuration indication, and the third DRB configuration indication is used to instruct the first network device not to configure the default DRB.
  • the first network device can learn, according to the third DRB configuration instruction in the first message, that the second network device has not handed over the decision to configure the default DRB to the first network device, and the first network device according to The third DRB configuration indication determines that the default DRB is not configured.
  • the first network device may learn that the second network device has handed over the decision to configure the default DRB to the first For the network device, the first network device may decide to configure the default DRB, that is, the first network device determines to configure the default DRB. Further, the first network device may also determine when to configure the default DRB, that is, after the first network device determines to configure the default DRB, it also determines the time when the default DRB is configured. Optionally, the first network device may also decide not to configure the default DRB, that is, the first network device determines not to configure the default DRB.
  • the first message includes the third DRB configuration status indication, which is used to indicate that the second network device has configured the default DRB; after receiving the first message, the first network device can follow the first The third DRB configuration status indication in the message learns that the second network device has not handed over the decision to configure the default DRB to the first network device, and the first network device determines not to configure the default DRB according to the third DRB configuration status indication.
  • the first network device may learn that the second network device has handed over the decision to configure the default DRB to the first For the network device, the first network device may decide to configure the default DRB, that is, the first network device determines to configure the default DRB. Further, the first network device may also determine when to configure the default DRB, that is, after the first network device determines to configure the default DRB, it also determines the time when the default DRB is configured. Optionally, the first network device may also decide not to configure the default DRB, that is, the first network device determines not to configure the default DRB.
  • the first network device does not have the configuration right of the default DRB
  • the second network device has the configuration right of the default DRB.
  • the second network device can be configured with a default DRB or not configured with a default DRB. Since the instruction information indicates that the first network device does not have the configuration right of the default DRB, the situation that multiple network devices simultaneously configure the default DRB for a session in a dual-connection or multi-connection scenario can be avoided.
  • the instruction information carried in the first message may also be an instruction message that indicates whether the second network device assigns the decision to configure the default DRB to the role of the first network device.
  • the first network device may determine whether the first network device has the right to determine the default DRB according to the specific meaning of the indication, and then determine whether to configure the default DRB, so as to complete the negotiation of the configuration right of the default DRB.
  • the following specifically introduces the indication information carried in the first message that can be implemented to indicate whether the second network device assigns the decision to configure the default DRB to the first network device.
  • the first message includes a second DRB configuration indication
  • the second DRB configuration indication is an indication indicating whether the first network device is configured with a default DRB.
  • the first network device may determine, according to the second DRB configuration instruction in the first message, whether the second network device will hand over the decision to configure the default DRB to the first network device.
  • the first network device can learn that the second network device has the right to decide to configure the default DRB to the first network device, and the first network device can decide to configure the default DRB.
  • DRB that is, the first network device may determine to configure the default DRB according to the first DRB configuration instruction.
  • the first network device can not only decide to configure the default DRB, but the first network device can also decide when to configure the default DRB, that is, the first network device determines the configuration default according to the second DRB configuration instruction After DRB, the time when the default DRB is configured can also be determined.
  • the first network device may also decide not to configure the default DRB, that is, the first network device determines not to configure the default DRB according to the second DRB configuration instruction DRB.
  • the first network device can learn that the second network device has not handed over the decision to configure the default DRB to the first network device, and the first network device is The second configuration instruction determines that the default DRB is not configured.
  • the first message includes the second DRB configuration status indication, and the second DRB configuration status indication is an indication indicating whether the second network device has configured the default DRB.
  • the first network device can determine, according to the second DRB configuration indication in the first message, whether the second network device will hand over the decision to configure the default DRB to the first network device.
  • the second DRB configuration indication indicates that the second network device is not configured with the default DRB
  • the first network device can learn that the second network device has transferred the decision to configure the default DRB to the first network device, and the first network device can It is determined to configure the default DRB, that is, the first network device can determine to configure the default DRB according to the second DRB configuration indication.
  • the first network device may also determine when to configure the default DRB, that is, after the first network device determines to configure the default DRB according to the second DRB configuration status indication, it may also determine the time when the default DRB is configured.
  • the first network device may also decide not to configure the default DRB, that is, the first network device determines according to the second DRB configuration indication Do not configure the default DRB.
  • the first network device learns that the second network device has not handed over the decision to configure the default DRB to the first network device, and the first network device is based on The second DRB configuration status indicates that it is determined not to configure the default DRB.
  • the above-mentioned indication information that can be used to indicate whether the decision to configure the default DRB is assigned to the role of the first network device can correspond to two different values, and the different values can be used to indicate the second network device respectively.
  • the decision right to configure the default DRB is handed over to the first network device and the second network device.
  • the decision right to configure the default DRB is not handed over to the first network device.
  • the second DRB configuration indication can be used as 0 to instruct the first network device to configure the default DRB, and the second DRB configuration
  • the indication 1 plays the role of instructing the first network device not to configure the default DRB; alternatively, the second DRB configuration indication 1 may be used to indicate the first network device configures the default DRB, and the second DRB configuration indication is 0 for the role Instruct the first network device not to configure the role of the default DRB.
  • the indication information is an indication of occupying a Boolean
  • the indication information can be used to indicate the first network device.
  • the default DRB is configured, and the indication information is false to indicate that the first network device does not configure the default DRB.
  • the second network device can use the indication information in the second message to indicate whether the second network device will hand over the decision to configure the default DRB to the first network device, and then the first network device
  • the configuration right of the default DRB can be determined according to the instruction information, and the negotiation of the configuration right of the default DRB is completed, which can avoid the situation that multiple network devices configure the default DRB for a session at the same time in a dual-connection or multi-connection scenario.
  • the aforementioned first message may specifically be an S-NODE addition request (S-NODE addition request) message.
  • the indication information in the aforementioned first message may be carried in the protocol data unit session resource configuration information (PDU Session Resource Setup Info-SN terminated) in the S-NODE addition request message terminated at the secondary base station.
  • the indication information in the first message involved above may be carried in the cell group configuration information (CG-ConfigInfo) in the S-NODE addition request message.
  • the first message involved above may specifically also be an S-NODE modification request (S-NODE modification request) message.
  • the indication information in the first message mentioned above may be carried in the protocol data unit session resource modification information (PDU Session Resource Modification Info-SN terminated) in the S-NODE modification request that is terminated at the secondary base station.
  • the indication information in the first message involved may be carried in the cell group configuration information (CG-ConfigInfo) in the S-NODE modification request message.
  • the first message may also be an S-NODE modification required message, or the first message may also be a secondary base station Change (S-NODE change required) message.
  • the indication information in the first message involved may be carried in the cell group configuration (CG-Config) in the S-NODE addition request message.
  • the first message may be a secondary base station modification request message or a secondary base station modification message.
  • the first message may also be another interaction message between two network devices in a communication system using dual connection technology or multi-connection technology, and the indication information in the first message may also be the interaction message.
  • the other indication information in this application is not limited in the embodiment of this application.
  • the first message mentioned above may carry information for indicating a certain session in addition to the above-mentioned indication information, that is, the first message
  • the message may also carry information for indicating which session is the default DRB to be negotiated, and the information may be, for example, the identifier of the session.
  • the first network device used to notify the first network device whether to configure the default DRB can enable the first network device and the second network device to complete the negotiation on the configuration right of the default DRB. , So that only one network device has the configuration right of the default DRB, which can avoid the situation that multiple network devices configure the default DRB for a session at the same time in dual-connection or multi-connection scenarios.
  • the first network device may also send the configuration information of the default DRB to the terminal device.
  • the terminal device refers to a terminal device that has a dual connection relationship or a multiple connection relationship with the first network device and the second network device.
  • the first network device may send the configuration information of the DRB to the second network device, and the second network device sends the configuration information of the default DRB to the terminal device through an RRC message.
  • the first network device may also directly send the configuration message of the default DRB to the terminal device through an RRC message.
  • the first network device after the first network device receives the first message from the second network device in the first network device, before the first network device sends the response message of the first message to the second network device, it confirms that the terminal is configured In the case of the default DRB, the first network device sends the configuration information of the default DRB to the second network device, and the second network device sends the configuration message of the default DRB to the terminal device through a radio resource control message.
  • the first network device sends the response message of the first message to the second network device and confirms that the default DRB is configured for the terminal, the first network device directly sends the configuration information of the default DRB to the terminal device.
  • the first network device can only send the configuration information of the default DRB to the second network device, and the second network device sends the configuration message of the default DRB to the terminal device through a radio resource control message.
  • the terminal device can determine the configuration of the default DRB, and then when performing uplink transmission, the terminal device can map the uplink QoS flow that has not configured the correspondence between the DRB and the QoS flow to The default DRB.
  • the second network device transfers the decision to configure the default DRB to the first network device through the first message, and the first network device determines to configure the default DRB according to the first message, in the configuration
  • the first network device may send a release instruction to the second network device.
  • the release instruction is used to indicate that the first network device has released the default DRB and the second network device receives the release. Instructions. After the default DRB is released, the first network device informs the second network device of the release of the DRB by the release instruction, so that the second network device can configure the default DRB.
  • FIG. 4 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • the embodiment of the present application is introduced from the perspective of interaction. The method may include the following steps:
  • Step S401 The second network device sends a first message to the first network device, where the first message is used to notify the first network device whether the default DRB is configured, and the first network device receives the first message.
  • Step S402 The first network device determines whether the first network device is configured with a default DRB according to the first message.
  • steps S401 to S402 can refer to the related description of steps S301 to S302, which will not be repeated here.
  • Step S403 The first network device sends a third message to the second network device.
  • the third message is used to indicate that the first network device is not configured with the default DRB or the first network device has configured the default DRB, and the second network device receives the third message.
  • the third message is a response to the first message.
  • the third message may include indication information to indicate whether the first network device is configured with a default DRB. You may refer to the indication information in the first message.
  • the indication information in the third message may also have the following situations :
  • the third message may include a fourth indication, which is used to indicate that the first network device has configured the default DRB.
  • the third message is used to indicate that the first network device is not configured with a default DRB.
  • the third message may include a fourth indication, which is used to indicate that the first network device is not configured with a default DRB.
  • the third message is used to indicate that the first network device has configured the default DRB.
  • the third message may include a fifth indication, which is an indication of whether the first network device has configured the default DRB.
  • the fifth indication may correspond to two different values, and the different values are used to respectively indicate that the first network device has configured the default DRB or indicate that the first network device has not configured the default DRB.
  • the first network device when the first network device confirms according to the first message that the second network device has handed over the decision right to configure the default DRB to the first network device, the first network device carries the fourth instruction or the fifth instruction in the third message. Instructions.
  • the third message only informs the current first network device whether the default DRB is configured. After sending the third message, the first network device may continue to retain the decision right of the default DRB. In another possible situation, the third message only informs whether the current first network device is configured with the default DRB. After the third message is sent, whether the subsequent first network device can configure the default DRB, the subsequent second network device The first message sent is confirmed again.
  • the third message may specifically be the secondary base station add request confirmation (S-NODE)
  • S-NODE secondary base station add request confirmation
  • the addition request ACKNOWLEDGE message or the secondary base station modification request confirmation (S-NODE modification request ACKNOWLEDGE) message is used to indicate acceptance of the request initiated by the second network device.
  • the indication information in the third message (that is, the fourth indication or the fifth indication) may be carried in the cell group configuration CG-Config in the S-NODE addition request ACKNOWLEDGE or S-NODE modification request ACKNOWLEDGE message.
  • the third message may also be an S-NODE addition request reject message or a secondary base station modification request confirmation
  • the (S-NODE modification request reject) message is used to reject the request initiated by the second network device.
  • the third message may also carry information for indicating a certain session, that is, the third message may also carry the default DRB for indicating which session to feed back. Information about the configuration status of the, the information may be, for example, the identifier of the session.
  • the third message may include the reason why the first network device is not configured with the default DRB.
  • the first network device after receiving the first message sent by the second network device for informing the first network device whether the first network device is configured with the default DRB, the first network device sends to the second network device for instructing the first network device An indication of whether to configure the default DRB, so that the second network device can determine that the first network device configures the default DRB.
  • the master network device can also configure the default DRB to avoid multiple network devices that have a dual connection relationship or a multiple connection relationship with the terminal device from establishing multiple defaults for the same session. DRB. Specifically, when the first network device is the primary network device, the first network device determines to configure the default DRB; when the first network device is the secondary network device, the first network device determines not to configure the default DRB.
  • the primary network device, the secondary network device, and the default DRB please refer to the foregoing description, which will not be repeated here.
  • the embodiment of the present application also provides a communication method in a handover scenario, which can be applied to a scenario where a main network device changes in a dual connection or a multiple connection.
  • the source master network device notifies the target master network device of the default DRB configuration status.
  • the communication method may include the following steps: the source master network device sends the default DRB configuration status to the target master network device, and the target master network device source Receive the default DRB configuration sent by the main network device.
  • the source master network device refers to the master network device corresponding to dual connections or multiple connections before changing the master network device
  • the target master network device refers to the master network device corresponding to dual connections or multiple connections after the master network device is changed.
  • the source primary network device may carry the default DRB configuration in the handover request message.
  • the default DRB configuration here refers to the default DRB negotiation between the source primary network device and the source secondary network device.
  • the default DRB configuration can be used to indicate whether the primary network device configures the default DRB or the secondary network device configures the default DRB.
  • the default DRB configuration condition may be carried in the handover preparation information (handoverPreparationInformation) in the handover request message.
  • the above-mentioned default DRB configuration refers to the default DRB configuration of a certain session, so in addition to the configuration of the default DRB, the handover request message mentioned above can also be used to indicate Information about a certain session, that is, the handover request message may also carry information used to indicate which session is the default DRB to be negotiated, and the information may be, for example, the identifier of the session.
  • the target primary network device can inherit the default DRB negotiation result between the source primary network device and the source secondary network device.
  • the result of negotiation between the source primary network device and the source secondary network device is that the source primary network device configures the default DRB for a session, and the target primary network device can also notify the target secondary network device to configure the default DRB for the session by the target primary network device .
  • the target primary network device may also negotiate the default DRB configuration of a certain PDU session with the target secondary network device according to its own strategy.
  • the source auxiliary network device and the target auxiliary network device may be the same network device or different network devices.
  • FIG. 5 is a schematic structural diagram of a network device provided by the present application.
  • the network device 50 may be implemented as the network device 2021 or the network device 2022 in the communication system shown in FIG.
  • the network device 50 may include a communication component 501, one or more processors 502, and a memory 503.
  • the communication component 501, the processor 502, and the memory 503 may be connected by one or more buses, or by other means. .
  • the communication component 501 may be used for the network device 50 to communicate with other communication devices, and the other communication devices may be, for example, another network device, a core network device, a terminal device, and the like.
  • the communication component 501 may include a wired communication interface, such as an Ethernet port, an optical fiber interface, and the like.
  • the communication component 502 may also include a wireless communication interface.
  • the communication component 501 may include a radio frequency interface and a radio frequency circuit to implement the functions implemented by the wireless communication interface.
  • the radio frequency circuit may include a transceiver and components (such as conductors, wires, etc.) for transmitting and receiving electromagnetic waves in free space during wireless communication.
  • the communication component 501 may be used to perform the receiving or sending operation performed by the first network device in the embodiment of FIG. 3 or FIG. 4, where the operation may include the above step S301, and/or the above step S401 And step S403.
  • the communication component 501 may also be used to perform the sending or receiving operation performed by the second network device in the embodiment shown in FIG. 3 or FIG. 4, where the operation includes the above step S301, and/or the above step S401 and step S403. .
  • the memory 503 is coupled with the processor 502, and is used to store various software programs and/or multiple sets of instructions.
  • the memory 503 may include a high-speed random access memory, and may also include a non-volatile memory.
  • the memory 503 may store a network communication program, and the network communication program may be used to communicate with other communication devices.
  • An operating system may also be built in the memory 503, for example, an operating system such as Windows and Linux.
  • the memory 503 may be used to store the implementation program of the communication method provided by one or more method embodiments of the present application on the first network device side and/or the second network device side.
  • the processor 502 may be a general-purpose processor, such as a central processing unit (CPU), and the processor 502 may also be a hardware chip.
  • the above-mentioned hardware chip may be one or a combination of the following: application specific integrated circuit (application specific integrated circuit) integrated circuit, ASIC), field programmable logic gate array (field programmable gate array, FPGA), complex programmable logic device (complex programmable logic device, CPLD).
  • the processor 502 may also be a combination of the foregoing processors.
  • the processor 502 may process data received by the communication part 501, and the processor 502 may also process data to be sent to the communication part 501 for transmission through a wireless transmission medium or a wired transmission medium.
  • the processor 502 can be used to read and execute computer readable instructions. Specifically, the processor 502 may be used to call a program stored in the memory 503, such as a program for implementing the communication method provided by one or more method embodiments of the present application on the first network device side and/or the second network device side, In combination with the communication component 501, the instructions contained in the program are executed.
  • a program stored in the memory 503 such as a program for implementing the communication method provided by one or more method embodiments of the present application on the first network device side and/or the second network device side.
  • the processor 502 may be configured to execute the foregoing step S301, and/or the foregoing step S401 and step S403 through the communication component 501.
  • the network device 50 shown in FIG. 5 is only an implementation manner of the present application. In actual applications, the network device 50 may include more or fewer components, which is not limited in the present application.
  • the communication system includes: a first network device 60 and a second network device 70.
  • the first network device and the second network device are network devices that provide multiple connection services for the same terminal device.
  • the communication system may be the communication system 10 described in FIG. 2, the first network device 60 may be the network device 2021 in the system shown in FIG. 1, and the second network device may be the network device 2022 in the system shown in FIG. Described separately below.
  • the first network device 60 may include: a sending unit 603 and a receiving unit 601. among them:
  • the receiving unit 601 is configured to receive a first message sent by the second network device, where the first message is used to notify the first network device whether the default DRB is configured.
  • the processing unit 602 is configured to determine whether the first network device is configured with a default DRB according to the first message.
  • the first network device may include a sending unit 603. among them:
  • the sending unit 603 is configured to send a release instruction to the second network device when the first network device releases the default DRB after the default DRB is configured.
  • the release instruction is used to indicate that the first network device has released the default DRB.
  • the sending unit 603 is further configured to send configuration information of the default DRB to the terminal device after the default DRB is configured.
  • the sending unit 603 is further configured to send a third message to the second network device, where the third message is used to indicate that the first network device has not configured the default DRB or the first network device has configured the default DRB.
  • the sending unit 603 may be used to execute step S403 in the embodiment of FIG. 4.
  • the second network device 70 may include: a sending unit 701. among them:
  • the sending unit 701 is configured to send a first message to the first network device, where the first message is used to notify the first network device whether the default DRB is configured.
  • the sending unit 701 may be used to perform step S301 in the embodiment of FIG. 3, and/or step S401 in the embodiment of FIG. 4
  • the second network device 70 may further include a receiving unit 702, where:
  • the receiving unit 702 is configured to receive a release instruction sent by the first network device, where the release instruction is used to indicate that the first network device has released the default DRB.
  • the receiving unit 702 is further configured to receive a third message sent by the first network device, where the third message is used to indicate that the first network device has not configured the default DRB or the first network device has configured the default DRB.
  • the receiving unit 702 may be used to perform step S403 in the embodiment of FIG. 4.
  • the computer program product includes one or more computer instructions.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a service or data center integrated with one or more available media.
  • the usable medium may be a semiconductor medium (for example, SSD) or the like.
  • modules and method steps of the examples described in conjunction with the embodiments disclosed in this application can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

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Abstract

本申请公开通信方法和网络设备，其中，方法包括：第一网络设备接收第二网络设备发送的第一消息，所述第一消息用于通知第一网络设备是否配置默认数据无线承载DRB，所述第一网络设备和所述第二网络设备是为同一终端设备提供多连接服务的网络设备；所述第一网络设备根据所述第一消息确定所述第一网络设备是否配置所述默认DRB。该技术方案可实现双连接或多连接场景下的多个网络设备针对一个默认DRB的配置权的协商，避免双连接或多连接场景下的多个网络设备同时为一个会话默认DRB的情况出现。

Description

通信方法和网络设备 技术领域
本申请涉及通信技术领域，尤其涉及通信方法和网络设备。
背景技术
随着多样化的业务和应用出现，第5代(5rd generation，5G)移动通信系统中引入了新的服务质量(quality of service，QoS)管理映射机制，以适应和满足多样化的QoS需求。在5G移动通信系统中，QoS架构可以如图1所示。其中，该QoS架构以QoS流为QoS控制的基本粒度，引入了两级QoS映射，由非接入层(non-access stratum，NAS)将具有相同QoS需求的数据包映射到一个QoS流，再由接入层将QoS流映射到数据无线承载(data radio bearer，DRB)，以满足不同的QoS需求。在5G移动通信系统中，核心网络设备与终端设备通过会话来实现业务交互，核心网络设备与终端设备之间可以建立一个或多个会话，每个会话可包括一个或多个QoS流。在每个会话中，可通过QoS流标识来标识各个QoS流。在该QoS架构中，具有相同QoS需求的下行数据包与下行QoS流之间的映射可以由核心网络设备实现，具有相同QoS需求的上行数据包与上行QoS流之间的映射可以由终端设备实现。其中，可以通过网络设备通知终端设备的方式，或者预先在终端设备内部配置映射关系的方式使得终端设备实现具有相同QoS需求的上行数据包与上行QoS流之间的映射。上下行QoS流与DRB之间的映射可以由网络设备实现。其中，网络设备可以通过无线资源控制(radio resource control，RRC)消息通知上行QoS流与DRB之间的映射规则，以使得终端设备获知上行QoS流与DRB之间的映射规则。终端设备也可以基于反射映射获知上行QoS流与DRB。这里的反射映射是指对于每个DRB而言，UE监测下行数据包的QoS流标识，然后将该QoS流的上行数据包映射到同一个DRB中，即终端设备根据下行QoS流到DRB的映射关系获得上行QoS流到DRB的映射关系。
一个会话还可以对应一个默认DRB，如果一个上行数据包对应的QoS流没有配置QoS流与DRB的映射关系，即网络设备没有通过RRC消息通知QoS流与DRB的映射关系，终端设备通过反射映射也获取不到QoS流与DRB的映射关系时，终端设备会把该QoS流的包映射到该默认DRB。每个会话对应的默认DRB可以由在核心网络设备与该会话所属的终端设备之间的网络设备进行配置。在采用双连接(dual connectivity，DC)或多连接技术的5G通信系统中，一个终端设备可以和多个网络设备同时建立连接并进行通信，即在核心网络设备与终端设备之间的并且同时与终端设备进行连接的网络设备存在多个，如果这多个网络设备均为该终端设备的同一个会话建立默认DRB，一个会话就可能对应多个默认DRB，导致在进行上行传输时，终端设备不能确定应该把属于该会话的并且还未配置DRB与QoS流之间的对应关系的上行QoS流映射到哪个DRB中。
发明内容
本申请提供通信方法和网络设备，解决双连接或多连接场景下出现一个会话对应多个默认DRB的问题。
第一方面，提供一种通信方法，可应用于网络设备，包括：
第一网络设备接收第二网络设备发送的第一消息，所述第一消息用于通知第一网络设备是否配置默认DRB，第一网络设备和第二网络设备是为同一个终端设备提供多连接服务的网络设备；第一网络设备根据第一消息确定第一网络设备是否配置默认DRB。
在该技术方案中，第一网络设备与第二网络设备为同一终端设备提供多连接服务，说明第一网络设备和第二网络设备为双连接或多连接场景下的网络设备，通过双连接或多连接场景下的第二网络设备向双连接或多连接场景下的第一网络设备发送用于通知第一网络设备是否配置默认DRB的消息，第一网络设备可以根据该第一消息确定是否建立默认DRB，实现了双连接或多连接场景下的多个网络设备针对一个默认DRB的配置情况的协商，可以避免双连接或多连接场景下的多个网络设备同时为一个会话配置默认DRB的情况出现。
结合第一方面，在一些可能的情况中，第二网络设备可以将配置默认DRB的决定权交与第一网络设备，第一网络设备可以配置默认DRB。在以下情况下，第一网络设备配置默认DRB：
第一种情况，第一消息包括第一DRB配置指示，第一DRB配置指示用于指示第一网络设备配置默认DRB；相应地，第一网络设备根据第一消息确定第一网络设备是否配置默认DRB可包括：第一网络设备根据第一DRB配置指示确定配置默认DRB。
第二种情况，第一消息包括第二DRB配置指示，第二DRB配置指示为指示第一网络设备是否配置默认DRB的指示；相应地，第一网络设备根据第一消息确定第一网络设备是否配置默认DRB可包括：在第二DRB配置指示是指示第一网络设备配置默认DRB的情况下，第一网络设备根据第二DRB配置指示确定配置默认DRB。
第三种情况，第一消息包括第一DRB配置情况指示，第一DRB配置情况指示用于指示第二网络设备未配置默认DRB；相应地，第一网络设备根据第一消息确定第一网络设备是否配置默认DRB可包括：第一网络设备根据第一DRB配置情况指示确定配置默认DRB。
第四种情况，第一消息包括第二DRB配置情况指示，第二DRB配置情况指示为指示第二网络设备是否已经配置默认DRB的指示；相应地，第一网络设备根据第一消息确定第一网络设备是否配置默认DRB可包括：在第二DRB配置情况指示是指示第二网络设备未配置默认DRB的情况下，第一网络设备根据第二DRB配置情况指示确定配置默认DRB。
第五种情况，第一消息包括第一指示，第一指示用于指示第一QoS流由第一网络设备进行承载，第一QoS流为第一会话的QoS流，第一会话为默认DRB对应的会话；相应地，第一网络设备根据第一消息确定第一网络设备是否配置默认DRB可包括：第一网络设备根据第一指示确定配置默认DRB。在一种具体实现方式中，该第一QoS流可以为第一会话的QoS流中出现频率最高的QoS流。
第六种情况，第一消息包括第二指示，第二指示用于指示第一会话的全部QoS流由第一网络设备进行承载，第一会话为默认DRB对应的会话；相应地，第一网络设备根据第一消息确定第一网络设备是否配置默认DRB可包括：第一网络设备根据第二指示确定配置默 认DRB。
第七种情况，第一消息包括第三指示，第三指示用于指示第二网络设备为第一会话配置的第一默认DRB转移至第一网络设备并且第一默认DRB承载的全部QoS流由第一网络设备进行承载，第一会话为默认DRB对应的会话；相应地，第一网络设备根据第一消息确定第一网络设备是否配置默认DRB可包括：第一网络设备根据第三指示确定配置默认DRB。
不限于上述情况中，在可选的实施方式中，第一网络设备配置默认DRB还可以有更多的情况。
在可选的情况中，在第二网络设备将配置默认DRB的决定权交与第一网络设备后，第一网络设备也可决定不配置默认DRB，即在上述情况下，上述第一网络设备根据第一消息确定第一网络设备是否配置默认DRB还可以为：第一网络设备根据第一消息确定不配置默认DRB。
在可选的情况中，在确定配置默认DRB之后，第一网络设备还可决定什么时候配置默认DRB，即在几种情况下，上述第一网络设备根据第一消息确定第一网络设备是否配置默认DRB之后，还可以包括：第一网络设备确定配置默认DRB的时刻。
通过上述情况，可使第二网络设备将配置默认DRB的决定权交与第一网络设备，完成了对默认DRB的配置情况的协商。
结合上述第一方面，在第一消息为上述第六种情况的情况下，上述第一网络设备根据第二指示确定配置默认DRB之后，还包括：第一网络设备接收第二网络设备发送的第二消息，第二消息用于通知第一网络设备第一会话的部分QoS流由第二网络设备进行承载；在已经配置默认DRB的情况下，第一网络设备根据第二消息取消默认DRB的配置。通过取消默认DRB的配置，相当于是将配置默认DRB的决定权交还给第二网络设备。
结合第一方面，在一种可能的情况中，上述第一网络设备根据第一消息确定第一网络设备是否配置所述默认DRB之后，还包括：在配置默认DRB之后，在第一网络设备释放默认DRB的情况下，第一网络设备向第二网络设备发送释放指示，该释放指示用于指示第一网络设备已经释放默认DRB。在释放了默认DRB后，第一网络设备通过通知第二网络设备，使得第二网络设备可以重新配置默认DRB。
结合第一方面，在一种可能的情况中，第一网络设备根据第一消息确定第一网络设备是否配置所述默认DRB之后，还包括：在配置默认DRB之后，第一网络设备将默认DRB的配置信息发送给终端设备。通过将默认DRB的配置信息发送给终端设备，使得终端设备可以确定默认DRB的配置，进而在进行上行传输时，终端设备可以将未配置DRB与QoS流之间的对应关系的上行QoS流映射到默认DRB中。
结合第一方面，在一些可能的情况中，第二网络设备也可以不将配置默认DRB的决定权交与第一网络设备，在不将配置默认DRB的决定权交与第一网络设备的情况下，第二网络设备通知第一网络设备不配置默认DRB，第一网络设备不配置默认DRB，可以有以下情况：
第一种情况，第一消息包括第三DRB配置指示，第三DRB配置指示用于指示第一网络设备不配置默认DRB；相应地，第一网络设备根据第一消息确定第一网络设备是否配置 默认DRB可包括：第一网络设备根据第三DRB配置指示确定不配置默认DRB。
第二种情况，第一消息包括第三DRB配置情况指示，第三DRB配置情况指示用于指示第一网络设备已经配置默认DRB的指示；相应地，第一网络设备根据第一消息确定第一网络设备是否配置默认DRB可包括：第一网络设备根据第三DRB配置情况指示确定不配置默认DRB。
结合第一方面，在一种可能的情况中，第一网络设备根据第一消息确定第一网络设备是否配置所述默认DRB之后，还包括：第一网络设备向第二网络设备发送第三消息，第三消息用于指示第一网络设备未配置默认DRB或第一网络设备已经配置默认DRB。第一网络设备通过向第二网络设备发送用于指示第一网络设备是否配置默认DRB的指示，使得第二网络设备可以确定第一网络设备配置默认DRB的情况。
结合第一方面，在一种可能的情况中，在第一网络设备未配置默认DRB的情况下，第三消息包括第一网络设备未配置默认DRB的原因。
结合第一方面，在一种可能的情况中，上述第一网络设备为主网络设备，上述第二网络设备为辅网络设备；或者，上述第一网络设备为辅网络设备，上述第二网络设备为主网络设备。
第二方面，提供一种配置默认数据无线承载的方法，可应用于网络设备，包括：如果第一网络设备为主网络设备，则第一网络设备确定配置默认DRB，第一网络设备为终端设备提供通信服务。
结合第二方面，在一种可能的情况中，如果第一网络设备为辅网络设备，则第一网络设备确定不配置默认DRB。
第三方面，提供一种网络设备，用于执行上述第一方面描述的通信方法或第二方面描述的配置默认数据无线承载的方法。该网络设备可包括：存储器以及与该存储器耦合的处理器，其中：该存储器用于存储上述第一方面描述的通信方法或第二方面描述的配置默认数据无线承载的方法的程序代码，该处理器用于执行该存储器中存储的程序代码，即执行上述第一方面所提供的方法，或者上述第一方面可能的情况中的任意一种情况所提供的方法，或者上述第二方面所提供的方法，或者上述第二方面可能的情况中的任意一种情况所提供的方法。
第四方面，提供另一种网络设备，该网络设备可包括多个功能模块，用于相应的执行上述第一方面所提供的方法，或者上述第一方面可能的情况中的任意一种情况所提供的方法，或者上述第二方面所提供的方法，或者上述第二方面可能的情况中的任意一种情况所提供的方法。
第五方面，提供一种计算机可读存储介质，该计算机可读存储介质上存储有指令，当其在计算机上运行时，使得计算机执行上述第一方面描述的通信方法或者上述第二方面描述的配置默认数据无线承载的方法。
第六方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第一方面描述的通信方法或者上述第二方面描述的配置默认数据无线承载的方法。
附图说明
图1是以QoS流为QoS控制的基本粒度的QoS架构示意图；
图2是本申请实施例提供的一种通信系统的架构示意图；
图3是本申请实施例提供一种通信方法的流程示意图；
图4是本申请实施例提供另一种通信方法的流程示意图；
图5是本申请提供的一种网络设备的结构示意图；
图6是本申请提供的一种通信系统和网络设备的功能框图。
具体实施方式
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。
本申请的技术方案可以应用于以QoS流为QoS控制的基本粒度并且采用双连接技术或多连接技术的通信系统。图2是本申请提供的一种通信系统的架构示意图，如图2所示，通信系统20可以由核心网络设备201和网络设备202组成，其中，网络设备202用于为终端设备提供通信服务，核心网络设备201用于为网络设备202提供业务支持和进行业务控制。具体地，该通信系统包括但不限于：5G移动通信系统以及未来通信系统。
在一种可能的情况中，核心网络设备201可包括接入和移动管理功能(access and mobility function，AMF)网元、会话管理功能(session management function，SMF)网元以及用户面功能(user plane function，UPF)网元等属于核心网的网元。其中，AMF和SMF为位于核心网控制面的网元，AMF和SMF可以用于处理控制面的信令，AMF与网络设备之间可通过N2连接完成控制面的信令交互。UPF为位于核心网用户面的网元，UPF可以用于处理用户面的数据，UPF与网络设备之间可通过N3连接完成用户面的数据交互。
网络设备202为一种部署在无线接入网中用以为终端设备提供无线通信功能的装置，网络设备可以通过无线传输空间的无线传输介质与终端设备进行无线通信。具体地，网络设备202可以包括各种形式的宏基站，微基站(也称为小站)，中继站，接入点，传输接入点(Transmission Receiver point，TRP)等。在采用不同的无线接入技术的系统中，网络设备的名称可能会有所不同，例如，在5G系统中，网络设备称为下一代节点(generation Node B，gNB)，网络设备也可以为连接到5G核心网的演进的通用陆基无线接入节点(Evolved universal terrestrial radio access network Node B，eNB)等。为方便描述，本申请所有实施例中，为终端设备提供无线通信功能的装置统称为网络设备。
在采用双连接技术或多连接技术的通信系统中，网络设备202可包括为同一终端设备提供双连接服务或多连接服务的多个网络设备，其中，为同一终端设备提供双连接服务或多个连接服务的多个网络设备是指该多个网络设备同时与同一终端设备建立连接并进行通信，以利用这多个网络设备的资源为该终端设备提供通信服务，这多个网络设备与该终端设备的连接即构成了双连接或多连接。具体地，该为同一终端设备提供多连接服务的多个网络设备可包括两种类型的网络设备，一种是与核心网络设备有控制面连接的网络设备，与核心网络设备有控制面连接的设备可以称为主网络设备。具体地，与核心网络设备有控制面连接的网络设备可以为与AMF连接的网络设备，如图2中的网络设备2021。另一种是与核心网络设备没有控制面连接的网络设备，与核心网络设备没有控制面连接的设备可以称为辅网络设备。具体地，与核心网络设备没有控制面连接的网络设备可以为与AMF 未连接的网络设备，如图2中的网络设备2022。需说明的是，该与核心网络设备有控制面连接的网络设备和与核心网络设备没有控制面连接的网络设备均是针对同一个终端设备而言，该与核心网络没有控制面连接的网络设备可以为其他终端设备对应的与核心网络设备有控制面连接的网络设备，例如，图2所示的网络设备2022在为除图2示出的终端设备之外的其他终端设备提供无线通信功能时，该网络设备2022可以通过N2连接与AMF连接，成为与核心网络设备有控制面的网络设备，即成为与该其他终端设备所对应的与核心网络设备有控制面连接的网络设备。本申请中，为同一终端设备提供双连接服务或多个连接服务的多个网络设备可以是提供同一无线接入制式的网络设备，也可以是提供不同无线接入制式的网络设备。比如一个是提供无线新空口(New Radio,NR)接入的网络设备，一个是提供演进的通用陆基无线接入节点(evolved universal terrestrial radio access,E-UTRA)的网络设备。
本申请实施例通过使与终端设备存在双连接关系或多连接关系的多个网络设备中的其中一个设备向该多个网络设备中的其他网络设备发送通知该其他网络设备是否配置默认DRB的消息，使得该其他网络设备可以根据该消息确定是否配置默认DRB，以完成多个网络设备之间针对该默认DRB的配置情况的协商，可避免多个网络设备为同一会话建立多个默认DRB。
由于为每个会话配置默认DRB的原理和流程相同，下述以协商一个会话对应的默认DRB的配置情况介绍本申请的方案，以下以默认DRB对应的会话为第一会话为例进行介绍，该第一会话为与多个网络设备具备双连接或多连接关系的终端设备的一个会话。
参见图3，图3是本申请实施例提供一种通信方法的流程示意图，以交互的角度进行介绍，该方法可以包括但不限于如下步骤：
步骤S301，第二网络设备向第一网络设备发送第一消息，第一消息用于通知第一网络设备是否配置默认DRB，第一网络设备接收第一消息。
步骤S302，第一网络设备根据第一消息确定第一网络设备是否配置默认DRB。
上述步骤S301和步骤S302涉及的第二网络设备和第一网络设备是为同一终端设备提供多连接服务的网络设备。其中，第二网络设备可以为主网络设备，第一网络设备可以为辅网络设备；或者，第一网络设备可以为主网络设备，第二网络设备可以为辅网络设备。关于为同一终端设备提供多连接服务的网络设备、主网络设备以及辅网络设备的概念可参见前述描述。
上述步骤S301和步骤S302涉及的默认DRB为用于承载第二QoS流的DRB，第二QoS流可以是第一会话中的还未配置与DRB之间的映射关系的上行QoS流。这里，会话可以理解为是为了实现一个业务或多个业务而建立的终端设备与数据网络(data network，DN)之间的关联，其中DN为终端设备提供服务。在不同的通信系统中，会话的名称可能会有所不同，例如，在5G通信系统中，会话被称为协议数据单元(protocol data unit，PDU)会话。
上述步骤S301和步骤S302涉及的第一消息为使得第一网络设备与第二网络设备能完成对默认DRB的配置情况的协商的消息，第一网络设备接收到第一消息后，可以确定默认DRB由哪一个网络设备配置。
在一些可能的情况中，第一消息中可以携带指示信息，该指示信息可以是实现指示第二网络设备将配置默认DRB的决定权交与第一网络设备的作用的指示信息，根据该指示信息，第一网络设备可以决定是否配置默认DRB，以此在第一网络设备和第二网络设备之间完成对默认DRB的配置权的协商。以下具体介绍第一消息中携带的可实现指示第二网络设备将配置默认DRB的决定权交与第一网络设备作用的指示信息的情况。
情况一：该第一消息可以包括第一DRB配置指示，第一DRB配置指示用于指示第一网络设备配置默认DRB。这里，第一DRB配置指示的一种含义可以是允许第一网络设备配置默认DRB。接收到该第一消息后，第一网络设备根据该第一消息中的第一DRB配置指示可获知第二网络设备将配置默认DRB的决定权交与第一网络设备，第一网络设备可以决定配置默认DRB，即第一网络设备可以根据该第一DRB配置指示确定配置默认DRB。进一步地，第一网络设备还可以决定什么时候配置该默认DRB，即第一网络设备根据第一DRB配置指示确定配置默认DRB之后，还确定配置默认DRB的时刻。可选地，第一网络设备也可以决定不配置默认DRB，即第一网络设备根据该第一DRB配置指示确定不配置默认DRB。
可选地，在该第一消息不包括该第一DRB配置指示的情况下，接收到该第一消息后，第一网络设备确定不配置默认DRB。
可选地，上述第一DRB配置指示的另一种含义也可以是明确指示第一网络设备配置默认DRB，在这种情况下，接收到该第一消息后，第一网络设备根据第一DRB配置指示确定配置默认DRB。进一步地，第一网络设备根据第一DRB配置指示确定配置默认DRB后，还可以确定配置默认DRB的时刻。
情况二：该第一消息包括第一DRB配置情况指示，第一DRB配置情况指示用于指示第二网络设备未配置默认DRB。接收到该第一消息后，第一网络设备根据该消息中的第一DRB配置指示可获知第二网络设备将配置默认DRB的决定权交与第一网络设备，第一网络设备可以决定配置默认DRB，即第一网络设备可根据该第一DRB配置指示确定配置默认DRB。进一步地，第一网络设备还可以决定什么时候配置该默认DRB，即第一网络设备根据第一DRB配置情况指示确定配置默认DRB之后，还确定配置默认DRB的时刻。可选地，第一网络设备也可以决定不配置默认DRB，即第一网络设备可根据第一DRB配置指示确定不配置默认DRB。
可选地，在该第一消息不包括该第一DRB配置指示的情况下，接收到该第一消息后，第一网络设备确定不配置默认DRB。
情况三：该第一消息包括第一指示，第一指示用于指示第一QoS流由第一网络设备进行承载，第一QoS流为第一会话的QoS流。接收到该第一消息后，第一网络设备根据第一消息中的第一指示可获知第二网络设备将配置默认DRB的决定权交与第一网络设备，第一网络设备可以决定配置默认DRB，即第一网络设备可根据该第一指示确定配置默认DRB。进一步地，接收到该第一消息后，第一网络设备还可以决定什么时候配置该默认DRB，即第一网络设备根据第一指示确定配置默认DRB之后，还确定配置默认DRB的时刻。可选地，第一网络设备也可以决定不配置默认DRB，即第一网络设备可根据第一指示确定不配置默认DRB。这里，第一QoS流可以为第一会话的QoS流中与其他QoS流有某方面的区 别的QoS流。例如，第一QoS流可以为第一会话的QoS流中的出现频率最高的QoS流。需要说明的是，这里的出现频率最高的QoS流可以是指通过一定的算法预测所确定的可能出现频率最高的QoS流，该出现频率最高的QoS流实际出现的频率不一定是第一会话的QoS流中最高的。可选地，在第一QOS流为出现频率最高的QoS流的情况下，第一指示可以为额外的QoS流信息(additional QoS flow information)，该信息指示一个会话中的某QoS流最可能比该会话中的其他QoS流更频繁出现。这里，第一QoS流由第一网络设备进行承载可以是指第一QoS流所对应的QoS流与DRB对应映射关系由第一网络设备决定。比如，由服务数据适配协议(service data adaptation protocol，SDAP)层负责QoS流与DRB对应的映射关系，第一QoS流由第一网络设备进行承载可以是指该第一QoS流对应的SDAP层位于第一网络设备中。
可选地，在该第一消息不包括该第一指示的情况下，接收到该第一消息后，第一网络可确定不配置默认DRB。
情况四：该第一消息包括第二指示，第二指示用于指示第一会话的全部QoS流由第一网络设备进行承载。接收到该第一消息后，第一网络设备根据第一消息中的第二指示可获知第二网络设备将配置默认DRB的决定权交与第一网络设备，第一网络设备可以决定配置默认DRB，即第一网络设备根据第二指示确定配置默认DRB。进一步地，第一网络设备还可以决定什么时候配置该默认DRB，即第一网络设备根据第二指示确定配置默认DRB之后，还确定配置默认DRB的时刻。可选地，第一网络设备也可以决定不配置默认DRB，即第一网络设备可根据第二指示确定不配置默认DRB。可选地，第一会话的全部QoS流由第一网络设备进行承载可以是指第一会话的全部QoS流对应的QoS流与DRB对应映射关系由第一网络设备决定。比如，由SDAP层负责QoS流与DRB对应的映射关系，第一会话的全部QoS流由第一网络设备进行承载可以是指全部QoS流对应的SDAP层位于第一网络设备中。
可选地，在第一会话的全部QoS流由第一网络设备进行承载之后，在核心网络设备通知第二网络设备在第一会话中增加新的QoS流并且由第二网络设备承载该新的QoS流的情况下，第二网络设备可以向第一网络设备发送第二消息，以对第一网络设备是否配置默认DRB进行指示。在一种可能的实现方式中，该第二消息可以用于指示将该新的QoS流由第一网络设备进行承载。在另一种可能的实现方式中，该第二消息可以用于通知第一网络设备第一会话的部分质量流由第二网络设备进行承载。如果该第二消息用于指示将新的QoS流由第一网络设备进行承载，接收到该第二消息后，在已经配置该默认DRB的情况下，第一网络设备可保持该默认DRB的配置。如果该第二消息用于通知第一网络设备第一会话的部分质量流由第二网络设备进行承载，接收到该第二消息后，在已经配置该默认DRB的情况下，第二网络设备可以取消该默认DRB的配置，即将原来配置的默认DRB改为非默认DRB，同时也可以取消配置默认DRB的决定权。第一网络设备也可保持该默认DRB的配置，同时也可以继续保持配置默认DRB的决定权。
情况五：第一消息包括第三指示，第三指示用于指示第二网络设备为第一会话配置的第一默认DRB转移至第一网络设备。接收到该第一消息后，第一网络设备根据第一消息中的第三指示可获知第二网络设备将配置默认DRB的决定权交与第一网络设备，第一网络设 备可以决定配置默认DRB，即第一网络设备根据第三指示确定配置默认DRB。进一步地，第一网络设备还可以决定什么时候配置该默认DRB，即第一网络设备根据第三指示确定配置默认DRB之后，还确定配置默认DRB的时刻。可选地，第一网络设备也可以决定不配置默认DRB，即第一网络设备可根据第三指示确定不配置默认DRB。可选地，第三指示用于指示第二网络设备为第一会话配置的第一默认DRB转移至第一网络设备并且第一默认DRB承载的全部QoS流由第一网络设备进行承载。可选地，第一默认DRB承载的全部QoS流由第一网络设备中进行承载是指第一QoS对应的QoS流与DRB对应映射关系由第一网络设备决定。比如，由服务数据适配协议SDAP层负责QoS流与DRB对应的映射关系，第一默认DRB承载的全部QoS流由第一网络设备进行承载可以是指这些QoS流对应的SDAP层位于第一网络设备中。
这里，第一网络设备确定配置默认DRB具体可以是指：第一网络设备将该第一默认DRB确定为第一会话的默认DRB，即，第一网络设备保持该第一默认DRB的配置；或者，第一网络设备将该将第一会话对应的不为该第一默认DRB的其他DRB配置为默认DRB，即第一网络设备取消第一默认DRB的配置，将该其他DRB配置为默认DRB。在一种可能的设计中，第一网络设备保持该第一默认DRB的配置后，在未接收到第二网络设备发送的其他用于指示第一网络设备是否配置默认DRB的消息的情况下，该第一网络设备不能将其他DRB配置为默认DRB。在另一种可能的设计中，第一网络设备保持该第一默认DRB的配置后，可以将该其他DRB配置为默认DRB。
这里，第一网络设备确定不配置默认DRB具体可以是指：第一网络设备取消第一默认DRB的配置。
不限于上述情况，在可选实施方式中，还可以有更多的可以实现指示第二网络设备将配置默认DRB的决定权交与第一网络设备的作用的指示信息，本申请实施例不做限制。
这里，在上述几种情况中，在将配置默认DRB的决定权交与第一网络设备的情况下，第一网络设备具备默认DRB的配置权，第二网络设备不具备默认DRB的配置权，第二网络设备不配置该默认DRB。第二网络设备不配置默认DRB，以及将配置默认DRB的决定权交与第一网络设备完成了对默认DRB的配置权的协商，可以避免双连接或多连接场景下多个网络设备同时为一个会话配置默认DRB的情况出现。
在另一些可能的情况中，第二消息中携带的指示信息也可以是实现指示第二网络设备未将配置默认DRB的决定权交与第一网络设备的作用的指示信息，根据该指示信息，第一网络设备可以确定不配置默认DRB，以此在第一网络设备和第二网络设备之间完成对默认DRB的配置权的协商。以下具体介绍第一消息中携带的可实现指示第二网络设备未将配置默认DRB的决定权交与第一网络设备作用的指示信息的情况。
情况一：第一消息包括第三DRB配置指示，第三DRB配置指示用于指示第一网络设备不配置默认DRB。接收到该第一消息后，第一网络设备可根据第一该消息中的第三DRB配置指示获知第二网络设备未将配置默认DRB的决定权交与第一网络设备，第一网络设备根据该第三DRB配置指示确定不配置默认DRB。
可选地，在该第一消息不包括该第三DRB配置指示的情况下，接收到该第一消息后，第一网络设备可获知第二网络设备将配置默认DRB的决定权交与第一网络设备，第一网络 设备可以决定配置默认DRB，即第一网络设备确定配置默认DRB。进一步地，第一网络设备还可以决定什么时候配置该默认DRB，即第一网络设备确定配置默认DRB之后，还确定配置默认DRB的时刻。可选地，第一网络设备也可以决定不配置默认DRB，即第一网络设备确定不配置默认DRB。
情况二：第一消息包括第三DRB配置情况指示，第三DRB配置情况指示用于指示第二网络设备已经配置默认DRB的指示；接收到该第一消息后，第一网络设备可根据第一该消息中的第三DRB配置情况指示获知第二网络设备未将配置默认DRB的决定权交与第一网络设备，第一网络设备根据第三DRB配置情况指示确定不配置默认DRB。
可选地，在该第一消息不包括该第三DRB配置指示的情况下，接收到该第一消息后，第一网络设备可获知第二网络设备将配置默认DRB的决定权交与第一网络设备，第一网络设备可以决定配置默认DRB，即第一网络设备确定配置默认DRB。进一步地，第一网络设备还可以决定什么时候配置该默认DRB，即第一网络设备确定配置默认DRB之后，还确定配置默认DRB的时刻。可选地，第一网络设备也可以决定不配置默认DRB，即第一网络设备确定不配置默认DRB。
不限于上述情况，在可选实施方式中，还可以有更多的可以实现指示第二网络设备未将配置默认DRB的决定权交与第一网络设备作用的指示信息，本申请实施例不做限制。
这里，在上述几种情况中，在未将配置默认DRB的决定权交与第一网络设备的情况下，第一网络设备不具备默认DRB的配置权，第二网络设备具备默认DRB的配置权，第二网络设备可以配置默认DRB，也可以不配置默认DRB。由于通过指示信息指示了第一网络设备不具备默认DRB的配置权，可以避免双连接或多连接场景下多个网络设备同时为一个会话配置默认DRB的情况出现。
在又一些可能的情况中，第一消息中携带的指示信息也可以是实现指示第二网络设备是否将配置默认DRB的决定权交与第一网络设备的作用的指示消息，根据该指示信息，第一网络设备可以根据指示的具体含义确定第一网络设备是否具备默认DRB的决定权，进而确定是否配置默认DRB，以此完成对默认DRB的配置权的协商。以下具体介绍第一消息中携带的可实现指示第二网络设备是否将配置默认DRB的决定权交与第一网络设备作用的指示信息的情况。
情况一：第一消息包括第二DRB配置指示，第二DRB配置指示为指示第一网络设备是否配置默认DRB的指示。接收到该第一消息后，第一网络设备根据该第一消息中的第二DRB配置指示可确定第二网络设备是否将配置默认DRB的决定权交与第一网络设备。在第二配置指示是指示第一网络设备配置默认DRB的情况下，第一网络设备可获知第二网络设备将配置默认DRB的决定权交与第一网络设备，第一网络设备可以决定配置默认DRB，即第一网络设备可以根据该第一DRB配置指示确定配置默认DRB。进一步地，接收到该第一消息后，第一网络设备不仅可以决定配置默认DRB，第一网络设备还可以决定什么时候配置该默认DRB，即第一网络设备根据第二DRB配置指示确定配置默认DRB之后，还可以确定配置默认DRB的时刻。可选地，在第二配置指示是指示第一网络设备配置默认DRB的情况下，第一网络设备也可以决定不配置默认DRB，即第一网络设备根据该第二DRB配置指示确定不配置默认DRB。在第二配置指示是指示第一网络设备不配置默认DRB 的情况下，第一网络设备可获知第二网络设备未将配置默认DRB的决定权交与第一网络设备，第一网络设备根据第二配置指示确定不配置默认DRB。
情况二：第一消息包括第二DRB配置情况指示，第二DRB配置情况指示为指示第二网络设备是否已经配置默认DRB的指示。接收到该第一消息后，第一网络设备根据该第一消息中的第二DRB配置情况指示可确定第二网络设备是否将配置默认DRB的决定权交与第一网络设备。在第二DRB配置情况指示是指示第二网络设备未配置默认DRB的情况下，第一网络设备可获知第二网络设备将配置默认DRB的决定权交与第一网络设备，第一网络设备可以决定配置默认DRB，即第一网络设备可以根据该第二DRB配置情况指示确定配置默认DRB。进一步地，第一网络设备还可以决定什么时候配置该默认DRB，即第一网络设备根据第二DRB配置情况指示确定配置默认DRB之后，还可以确定配置默认DRB的时刻。可选地，在第二DRB配置情况指示是指示第二网络设备未配置默认DRB的情况下，第一网络设备也可以决定不配置默认DRB，即第一网络设备根据该第二DRB配置指示确定不配置默认DRB。在第二DRB配置情况指示是指示第一网络设备已经配置默认DRB的情况下，第一网络设备获知第二网络设备未将配置默认DRB的决定权交与第一网络设备，第一网络设备根据第二DRB配置情况指示确定不配置默认DRB。
不限于上述情况，在可选实施方式中，还可以有更多的可实现指示第二网络设备是否将配置默认DRB的决定权交与第一网络设备作用的指示信息，本申请实施例不做限制。
具体实现中，上述可实现指示是否将配置默认DRB的决定权交与第一网络设备作用的指示信息可对应两个不同的取值，该不同的取值可分别用于起指示第二网络设备将配置默认DRB的决定权交与第一网络设备和第二网络设备未将配置默认DRB的决定权交与第一网络设备的左右。例如，用上述涉及的第二DRB配置指示为占用一个比特位的指示，则可以用该第二DRB配置指示为0来起到指示第一网络设备配置默认DRB的作用，用该第二DRB配置指示为1起指示第一网络设备不配置默认DRB的作用；或者，可以用该第二DRB配置指示为1起指示第一网络设备配置默认DRB的作用，用该第二DRB配置指示为0起指示第一网络设备不配置默认DRB的作用。可选地，上述涉及的实现指示是否将配置默认DRB的决定权交与第一网络设备作用的指示信息为占用一个布尔的指示，则可以用该指示信息为true来起到指示第一网络设备配置默认DRB的作用，用该指示信息为false起指示第一网络设备不配置默认DRB的作用。
这里，在上述几种情况中，第二网络设备可以通过在第二消息中的指示信息用于指示第二网络设备是否将配置默认DRB的决定权交与第一网络设备，进而第一网络设备可根据该指示信息确定默认DRB的配置权，完成了对默认DRB的配置权的协商，可以避免双连接或多连接场景下多个网络设备同时为一个会话配置默认DRB的情况出现。
在一种可行的实施方式中，上述涉及的第一消息具体可以为辅基站添加请求(S-NODE addition request)消息。可选地，上述涉及的第一消息中的指示信息可以携带在S-NODE addition request消息中的终止于辅基站的协议数据单元会话资源配置信息(PDU Session Resource Setup Info–SN terminated)中。可选地，上述涉及的第一消息中的指示信息可以携带在S-NODE addition request消息中的小区组配置信息(cell group configuration information,CG-ConfigInfo)中。在另一种可行的实施方式中，上述涉及的第一消息具体还 可以为辅基站修改请求(S-NODE modification request)消息。可选地，上述涉及的第一消息中的指示信息可以携带在S-NODE modification request中的终止于辅基站的协议数据单元会话资源修改信息(PDU Session Resource modification Info–SN terminated)中。可选地，上述涉及的第一消息中的指示信息可以携带在S-NODE modification request消息中的小区组配置信息(cell group configuration information,CG-ConfigInfo)中。可选地，在第一消息携带的指示信息为上述第三指示的情况下，第一消息还可以为辅基站修改需求(S-NODE modification required)消息，或者，第一消息还可以为辅基站更改(S-NODE change required)消息。可选地，上述涉及的第一消息中的指示信息可以携带在S-NODE addition request消息中的小区组配置(cell group configuration,CG-Config)中。其中，如果第一网络设备是主网络设备，第二网络设备是辅网络设备，则第一消息可以是辅基站修改需求消息或辅基站更改消息。不限于这里的描述。在可选的实施方式中，第一消息还可以为采用双连接技术或多连接技术的通信系统中两个网络设备之间的其他交互消息，第一消息中的指示信息还可以是该交互消息中的其他指示信息，本申请实施例不做限制。
应理解的是，由于每个会话都可能配置默认DRB，所以上述涉及的第一消息除了携带上述提到的指示信息外，还可以携带用于指示某个会话的信息，也就是说，第一消息中还可以携带用于指示是协商哪一个会话的默认DRB的信息，该信息例如可以为会话的标识。
结合上述描述可知，本申请实施例中，通过用于通知第一网络设备是否配置默认DRB的第一网络设备，可使得第一网络设备与第二网络设备能完成对默认DRB的配置权的协商，使得只有一个网络设备具备默认DRB的配置权，可以避免双连接或多连接场景下多个网络设备同时为一个会话配置默认DRB的情况出现。
在一些可能的情况中，在第二网络设备通过第一消息将配置默认DRB的决定权交与第一网络设备，并且，第一网络根据第一消息确定配置默认DRB的情况下，在配置默认DRB之后，第一网络设备还可以将默认DRB的配置信息发送给终端设备。其中，终端设备是指与第一网络设备和第二网络设备具备双连接关系或多连接关系的终端设备。在一种可行的实施方式中，第一网络设备可以将该DRB的配置信息发送给第二网络设备，第二网络设备通过RRC消息将该默认DRB的配置信息发送给终端设备。在另一种可行的实施方式中，第一网络设备也可以直接通过RRC消息将该默认DRB的配置消息发送给终端设备。可选地，当第一网络设备在第一网络设备收到第二网络设备的第一消息之后，在第一网络设备给第二网络设备发送第一消息的响应消息之前，确认了为终端配置默认DRB时，第一网络设备将默认DRB的配置信息发送给第二网络设备，第二网络设备通过无线资源控制消息将该默认DRB的配置消息发送给终端设备。当第一网络设备给第二网络设备发送第一消息的响应消息之后，确认了为终端配置默认DRB时，第一网络设备将默认DRB的配置信息直接发送给终端设备。可选地，也可以通过协议规定第一网络设备只能将默认DRB的配置信息发送给第二网络设备，第二网络设备通过无线资源控制消息将该默认DRB的配置消息发送给终端设备。通过将默认DRB的配置信息发送给终端设备，使得终端设备可以确定默认DRB的配置，进而在进行上行传输时，终端设备可以将未配置DRB与QoS流之间的对应关系的上行QoS流映射到默认DRB中。
在一些可能的情况中，在第二网络设备通过第一消息将配置默认DRB的决定权交与第 一网络设备，并且，第一网络设备根据第一消息确定配置默认DRB的情况下，在配置默认DRB之后，如果第一网络设备释放该默认DRB，第一网络设备可以向第二网络设备发送释放指示，该释放指示用于指示第一网络设备已经释放默认DRB，第二网络设备接收该释放指示。在释放了默认DRB后，第一网络设备通过释放指示通知第二网络设备第一网络设备释放了该DRB，使得第二网络设备可以配置默认DRB。
在一些可能的情况中，第一网络设备在接收到第一消息后，还可以通过该第一消息对应的响应消息向第二网络设备反馈默认DRB的配置情况。参见图4，图4是本申请实施例提供的另一种通信方式的流程示意图，本申请实施例以交互的角度进行介绍，该方法可以包括如下步骤：
步骤S401，第二网络设备向第一网络设备发送第一消息，第一消息用于通知第一网络设备是否配置默认DRB，第一网络设备接收第一消息。
步骤S402，第一网络设备根据第一消息确定第一网络设备是否配置默认DRB。
这里，步骤S401～S402的具体描述可参见步骤S301～S302的相关描述，此处不再赘述。
步骤S403，第一网络设备向第二网络设备发送第三消息，第三消息用于指示第一网络设备未配置默认DRB或第一网络设备已经配置默认DRB，第二网络设备接收第三消息。
这里，第三消息为对第一消息的响应。具体地，第三消息中可包括指示信息，用于指示第一网络设备是否配置默认DRB，可参考第一消息中的指示信息的情况，第三消息中的指示信息也可以有如下几种情况：
情况一：该第三消息可包括第四指示，该第四指示用于指示第一网络设备已经配置默认DRB。可选地，在第三消息不包括该第四指示的情况下，该第三消息用于指示第一网络设备未配置默认DRB。
情况二：第三消息可包括第四指示，该第四指示用于指示第一网络设备未配置默认DRB。可选地，在第三消息不包括该第四指示的情况下，该第三消息用于指示第一网络设备已经配置默认DRB。
情况三：第三消息可包括第五指示，该第五指示为第一网络设备是否已经配置默认DRB的指示。具体地，第五指示可对应两个不同的取值，该不同的取值用于分别指示第一网络设备已经配置默认DRB或者指示第一网络设备未配置默认DRB。
可选地，当第一网络设备根据第一消息确认第二网络设备将配置默认DRB的决定权交与第一网络设备时，第一网络设备才在第三消息中携带第四指示或第五指示。在一种可能的情况中，第三消息只是通知当前第一网络设备是否配置默认DRB，在发送第三消息后，第一网络设备可继续保留默认DRB的决定权。在另一种可能的情况中，第三消息中只是通知当前第一网络设备是否配置默认DRB，在发送第三消息后，后续第一网络设备能否配置默认DRB，需要由后续第二网络设备发送的第一消息重新确定。
在一种可能的实施方式中，在第一网络设备为辅网络设备，并且，第二网络设备为主网络设备的情况下，该第三消息可以具体可以为辅基站添加请求确认(S-NODE addition request ACKNOWLEDGE)消息或辅基站修改请求确认(S-NODE modification request ACKNOWLEDGE)消息，用于表示接受第二网络设备发起的请求。可选地，第三消息中指示信息(即第四指示或第五指示)可以携带在S-NODE addition request ACKNOWLEDGE 或S-NODE modification request ACKNOWLEDGE消息中的小区组配置CG-Config中。可选地，在该第三消息用于指示第一网络设备未配置默认DRB的情况下，第三消息也可以为辅基站添加请求拒绝(S-NODE addition request reject)消息或辅基站修改请求确认(S-NODE modification request reject)消息，用于拒绝第二网络设备发起的请求。可选地，第三消息除了携带上述提到的指示信息外，还可以携带用于指示某个会话的信息，也就是说，第三消息还可以携带用于指示是反馈哪一个会话的默认DRB的配置情况的信息，该信息例如可以为会话的标识。
可选地，在第一网络设备未配置默认DRB的情况下，第三消息可包括第一网络设备未配置默认DRB的原因。
本申请实施例中，第一网络设备在接收到第二网络设备发送的用于通知第一网络设备是否配置默认DRB的第一消息后，通过向第二网络设备发送用于指示第一网络设备是否配置默认DRB的指示，使得第二网络设备可以确定第一网络设备配置默认DRB的情况。
可选地，在一种可能的情况中，还可以通过设定由主网络设备配置默认DRB来可避免与终端设备存在双连接关系或多连接关系的多个网络设备为同一会话建立多个默认DRB。具体地，在第一网络设备为主网络设备，第一网络设备确定配置默认DRB；在第一网络设备为辅网络设备的情况下，第一网络设备确定不配置默认DRB。关于主网络设备、辅网络设备以及默认DRB的描述，可参见前述描述，此处不再赘述。
本申请实施例还提供了一种切换场景下的通信方法，可应用至双连接或多连接中主网络设备改变场景中。在该场景中，由源主网络设备通知目标主网络设备对应的默认DRB配置情况，该通信方法可包括如下步骤：源主网络设备向目标主网络设备发送默认DRB配置情况，目标主网络设备源接收主网络设备发送的默认DRB配置情况。
这里，源主网络设备是指改变主网络设备前双连接或多连接对应的主网络设备，目标主网络设备是指改变主网络设备后双连接或多连接对应的主网络设备。
具体地，源主网络设备可以在切换请求消息中携带默认DRB配置情况。这里的默认DRB配置情况是指源主网络设备和源辅网络设备之间的默认DRB协商情况。该默认DRB配置情况可用于指示是主网络设备配置默认DRB还是辅网络设备配置默认DRB。
在一种可行的实施方式中，默认DRB配置情况可以在切换请求消息中的切换准备信息(handoverPreparationInformation)中携带。
这里，由于每个会话都可能配置默认DRB，上述默认DRB配置情况是指某个会话的默认DRB配置情况，所以上述涉及的切换请求消息除了携带默认DRB的配置情况外，还可以携带用于指示某个会话的信息，也就是说，切换请求消息还可以携带用于指示是协商哪一个会话的默认DRB的信息，该信息例如可以为会话的标识。
这里，目标主网络设备收到源主网络设备发送的默认DRB配置情况后，目标主网络设备可以继承源主网络设备和源辅网络设备之间的默认DRB协商结果。比如源主网络设备和源辅网络设备协商的结果是由源主网络设备配置某个会话的默认DRB，则目标主网络设备也可以通知目标辅网络设备由目标主网络设备配置该会话的默认DRB。可选地，目标主网络设备还可以重新按照自己的策略和目标辅网络设备协商某个PDU会话的默认DRB配置。
可选地，源辅网络设备和目标辅网络设备可以是同一个网络设备，也可以是不同的网 络设备。
上述详细描述了本申请的方法，为了更好地实施本申请的方法，相应地，下面提供了本申请的装置。
参见图5，图5是本申请提供的一种网络设备的结构示意图，网络设备50可以实现为图2所示的通信系统中的网络设备2021或网络设备2022。如图5所示，网络设备50可包括通信部件501、一个或多个处理器502、存储器503，通信部件501、处理器502以及存储器503可以通过一个或多个总线连接，或者通过其他方式连接。
通信部件501可用于网络设备50与其他通信设备通信，其他通信设备例如可以为另一网络设备、核心网络设备、终端设备等。通信部件501可包括有线通信接口，例如为以太网口、光纤接口等。可选地，通信部件502还可以包括无线通信接口。具体实现中，该通信部件501可以包括射频接口以及射频电路，以用于实现无线通信接口所实现的功能。射频电路可包括收发机以及用于在无线通信时在自由空间中发送和接收电磁波的部件(如导体、导线等)等。
本申请实施例中，通信部件501可用于执行上述图3或图4实施例中第一网络设备执行的接收或发送的操作，其中，该操作可包括上述步骤S301，和/或，上述步骤S401和步骤S403。通信部件501也可以用于执行上述图3或图4所示实施例中第二网络设备执行的发送或接收的操作，其中，该操作包括上述步骤S301，和/或，上述步骤S401和步骤S403。
存储器503与处理器502耦合，用于存储各种软件程序和/或多组指令。具体实现中，存储器503可包括高速随机存取的存储器，并且也可包括非易失性存储器。存储器503中可以存储有网络通信程序，该网络通信程序可用于与其他通信设备进行通信。存储器503中还可以内置有操作系统，例如为Windows、Linux等操作系统。
在本申请的一些实施例中，存储器503可用于存储本申请的一个或多个方法实施例提供的通信方法在第一网络设备侧和/或第二网络设备侧的实现程序。
处理器502可以为通用处理器，例如中央处理器(central processing unit，CPU)，处理器502也可以为硬件芯片，上述硬件芯片可以是以下一种或多种的组合：专用集成电路(application specific integrated circuit，ASIC)、现场可编程逻辑门阵列(field programmable gate array，FPGA)，复杂可编程逻辑器件(complex programmable logic device，CPLD)。处理器502还可以为上述处理器的组合。处理器502可处理通信部件501接收到的数据，处理器502还可处理将被发送到通信部件501以通过无线传输介质或有线传输介质传送的数据。
处理器502可用于读取和执行计算机可读指令。具体的，处理器502可用于调用存储于存储器503中的程序，例如本申请的一个或多个方法实施例提供的通信方法在第一网络设备侧和/或第二网络设备侧的实现程序，并结合通信部件501执行该程序包含的指令。
本申请实施例中，处理器502可用于通过通信部件501执行上述步骤S301，和/或，上述步骤S401和步骤S403。
应理解的是，图5所示的网络设备50仅为本申请的一种实现方式，实际应用中，网络设备50可以包括更多或更少的部件，本申请不作限制。
参见图6，图6示出了本申请提供的一种通信系统、第一网络设备、第二网络设备。该通信系统包括：第一网络设备60和第二网络设备70，第一网络设备和第二网络设备是为同一终端设备提供多连接服务的网络设备。其中，通信系统可以是图2描述的通信系统10，第一网络设备60可以为图1所示系统中的网络设备2021，第二网络设备可以为图2所示系统中的网络设备2022。下面分别描述。
如图6所示，第一网络设备60可包括：发送单元603和接收单元601。其中：
接收单元601，用于接收第二网络设备发送的第一消息，第一消息用于通知第一网络设备是否配置默认DRB。
处理单元602，用于根据第一消息确定第一网络设备是否配置默认DRB。
这里，接收单元601可用于执行图3实施例的步骤S301，或，图4实施例的步骤S401；处理单元602可用于执行图3实施例的步骤S302，或，图4实施例的步骤S402。
可选地，第一网络设备可包括发送单元603。其中：
发送单元603，用于在配置默认DRB之后，在第一网络设备释放默认DRB的情况下，向第二网络设备发送释放指示，该释放指示用于指示第一网络设备已经释放默认DRB。
可选地，发送单元603还用于，在配置默认DRB之后，将默认DRB的配置信息发送给终端设备。
可选地，发送单元603还用于，向第二网络设备发送第三消息，第三消息用于指示第一网络设备未配置默认DRB或第一网络设备已经配置默认DRB。
这里，发送单元603可用于执行图4实施例的步骤S403。
如图6所示，第二网络设备70可包括：发送单元701。其中：
发送单元701，用于向第一网络设备发送第一消息，第一消息用于通知第一网络设备是否配置默认DRB。
这里，发送单元701可用于执行图3实施例的步骤S301，和/或，图4实施例的步骤S401
可选地，第二网络设备70还可包括接收单元702，其中：
接收单元702，用于接收第一网络设备发送的释放指示，释放指示用于指示第一网络设备已经释放默认DRB。
可选地，接收单元702还用于，接收第一网络设备发送的第三消息，第三消息用于指示第一网络设备未配置默认DRB或第一网络设备已经配置默认DRB。
这里，接收单元702可用于执行图4实施例的步骤S403。
本申请实施例中，有关于第一消息、默认DRB、第二消息、释放指示以及第三消息等的描述，可参考前述方法实施例的相关描述，此处不再赘述。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机指令可以存储在计算机可读存储介质中，或者通过所述计算机可读存储介质进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务、数据中心等 数据存储设备。所述可用介质可以是半导体介质(例如SSD)等。
本领域普通技术人员可以意识到，结合本申请中所公开的实施例描述的各示例的模块及方法步骤，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申请的范围。
需说明，本申请实施例所涉及的第一、第二、第三以及各种数字编号仅为描述方便进行的区分，并不用来限制本申请实施例的范围。
以上所述，仅为本申请的具体实施方式，但本申请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申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (46)

  1. 一种通信方法，其特征在于，包括：
    第一网络设备接收来自于第二网络设备的第一信息，其中，所述第一信息用于指示第一网络设备是否配置默认数据无线承载DRB，所述第一网络设备和所述第二网络设备是为同一终端设备提供多连接服务的网络设备；
    所述第一网络设备根据所述第一信息确定所述第一网络设备是否配置默认DRB。
  2. 根据权利要求1所述的方法，其特征在于，
    当所述第一信息用于指示所述第一网络设备配置默认DRB时，
    所述第一网络设备根据所述第一信息确定所述第一网络设备是否配置默认DRB包括：
    所述第一网络设备确定配置默认DRB或者不配置默认DRB。
  3. 根据权利要求1所述的方法，其特征在于，
    当所述第一信息用于指示所述第一网络设备不配置默认DRB时，
    所述第一网络设备根据所述第一信息确定所述第一网络设备是否配置默认DRB包括：
    所述第一网络设备确定不配置默认DRB。
  4. 根据权利要求1-3任一项所述的方法，其特征在于，所述第一信息包含在第一消息中。
  5. 根据权利要求4所述的方法，其特征在于，所述第一消息为辅基站添加请求消息，所述第一信息包含在所述辅基站添加请求消息中的终止于辅基站的协议数据单元会话资源配置信息中。
  6. 根据权利要求4所述的方法，其特征在于，所述第一消息为辅基站修改请求消息，所述第一信息包含在所述辅基站修改请求消息中的终止于辅基站的协议数据单元会话资源修改信息中。
  7. 根据权利要求4-6任一项所述的方法，其特征在于，所述第一消息还包括所述第一信息对应的会话的信息，所述会话信息用于指示第一网络设备是否配置所述会话的默认DRB。
  8. 根据权利要求1-7任一项所述的方法，其特征在于，当所述第一网络设备根据所述第一信息确定配置默认DRB时，所述方法还包括：
    所述第一网络设备向终端设备发送默认DRB的配置信息。
  9. 根据权利要求1所述的方法，其特征在于，所述第一信息为第一DRB配置情况指 示，所述第一DRB配置情况指示用于指示所述第二网络设备未配置默认DRB；
    所述第一网络设备根据所述第一信息确定所述第一网络设备是否配置默认DRB，包括：
    所述第一网络设备根据所述第一DRB配置情况指示确定配置默认DRB。
  10. 根据权利要求1所述的方法，其特征在于，所述第一信息为第二DRB配置情况指示，所述第二DRB配置情况指示为指示所述第二网络设备是否已经配置默认DRB的指示；
    所述第一网络设备根据所述第一信息确定所述第一网络设备是否配置默认DRB，包括：
    在所述第二DRB配置情况指示是指示所述第二网络设备未配置默认DRB的情况下，所述第一网络设备根据所述第二DRB配置情况指示确定配置默认DRB。
  11. 根据权利要求1所述的方法，其特征在于，所述第一信息为第一指示，所述第一指示用于指示第一服务质量流由所述第一网络设备进行承载，所述第一服务质量流为第一会话的服务质量流，所述第一会话为默认DRB对应的会话；
    所述第一网络设备根据所述第一信息确定所述第一网络设备是否配置默认DRB，包括：
    所述第一网络设备根据所述第一指示确定配置默认DRB。
  12. 根据权利要求11所述的方法，其特征在于，所述第一服务质量流为所述第一会话的服务质量流中出现频率最高的服务质量流。
  13. 根据权利要求1所述的方法，其特征在于，所述第一信息为第二指示，所述第二指示用于指示第一会话的全部服务质量流由所述第一网络设备进行承载，所述第一会话为默认DRB对应的会话；
    所述第一网络设备根据所述第一信息确定所述第一网络设备是否配置默认DRB，包括：
    所述第一网络设备根据所述第二指示确定配置默认DRB。
  14. 根据权利要求13所述的方法，其特征在于，所述第一网络设备根据所述第二指示确定配置默认DRB之后，还包括：
    所述第一网络设备接收所述第二网络设备发送的第二消息，所述第二消息用于通知所述第一网络设备所述第一会话的部分服务质量流由所述第二网络设备进行承载；
    在已经配置默认DRB的情况下，所述第一网络设备根据所述第二消息取消默认DRB的配置。
  15. 根据权利要求1所述的方法，其特征在于，所述第一信息为第三指示，所述第三指示用于指示所述第二网络设备为第一会话配置的第一默认DRB转移至所述第一网络设备并且所述第一默认DRB承载的全部服务质量流由所述第一网络设备进行承载，所述第一会话为默认DRB对应的会话；
    所述第一网络设备根据所述第一信息确定所述第一网络设备是否配置默认DRB，包括：
    所述第一网络设备根据所述第三指示确定配置默认DRB。
  16. 根据权利要求1-15任一项所述的方法，其特征在于，所述第一网络设备根据所述第一信息确定所述第一网络设备是否配置默认DRB之后，所述方法还包括：
    所述第一网络设备确定配置默认DRB的时刻。
  17. 根据权利要求1-16任一项所述的方法，其特征在于，所述第一网络设备根据所述第一信息确定所述第一网络设备是否配置默认DRB之后，所述方法还包括：
    在配置默认DRB之后，在所述第一网络设备释放默认DRB的情况下，所述第一网络设备向所述第二网络设备发送释放指示，所述释放指示用于指示所述第一网络设备已经释放默认DRB。
  18. 根据权利要求1-17任一项所述的方法，其特征在于，所述第一网络设备根据所述第一信息确定所述第一网络设备是否配置默认DRB之后，所述方法还包括：
    在配置默认DRB之后，所述第一网络设备将默认DRB的配置信息发送给所述终端设备。
  19. 根据权利要求1-18任一项所述的方法，其特征在于，所述第一网络设备根据所述第一信息确定所述第一网络设备是否配置默认DRB之后，所述方法还包括：
    所述第一网络设备向所述第二网络设备发送第三消息，所述第三消息用于指示所述第一网络设备未配置默认DRB或所述第一网络设备已经配置默认DRB。
  20. 根据权利要求19所述的方法，其特征在于，在所述第一网络设备未配置默认DRB的情况下，所述第三消息包括所述第一网络设备未配置默认DRB的原因。
  21. 根据权利要求1-20任一项所述的方法，其特征在于，所述第一网络设备为辅网络设备，所述第二网络设备为主网络设备。
  22. 一种网络设备，其特征在于，包括处理器，所述处理器用于与存储器耦合，读取并执行所述存储器中的指令，以实现：
    通过通信接口接收来自于第二网络设备的第一信息，所述第一信息用于指示所述网络设备是否配置默认数据无线承载DRB，所述网络设备和所述第二网络设备是为同一终端设备提供多连接服务的网络设备；
    根据所述第一信息确定所述网络设备是否配置默认DRB。
  23. 根据权利要求22所述的网络设备，其特征在于，当所述第一信息用于指示所述第一网络设备配置默认DRB时，所述处理器读取并执行所述存储器中的指令，以实现根据所述第一信息确定所述第一网络设备是否配置默认DRB，包括：
    确定配置默认DRB或者不配置默认DRB。
  24. 根据权利要求22所述的网络设备，其特征在于，当所述第一信息用于指示所述第一网络设备不配置默认DRB时，所述处理器读取并执行所述存储器中的指令，以实现根据所述第一信息确定所述第一网络设备是否配置默认DRB，包括：
    确定不配置默认DRB。
  25. 根据权利要求22-24任一项所述的网络设备，其特征在于，所述第一信息包含在第一消息中。
  26. 根据权利要求25所述的网络设备，其特征在于，所述第一消息为辅基站添加请求消息，所述第一信息包含在所述辅基站添加请求消息中的终止于辅基站的协议数据单元会话资源配置信息中。
  27. 根据权利要求25所述的网络设备，其特征在于，所述第一消息为辅基站修改请求消息，所述第一信息包含在所述辅基站修改请求消息中的终止于辅基站的协议数据单元会话资源修改信息中。
  28. 根据权利要求25-27任一项所述的网络设备，其特征在于，所述第一消息还包括所述第一信息对应的会话的信息，所述会话信息用于指示第一网络设备是否配置所述会话的默认DRB。
  29. 根据权利要求22-28任一项所述的网络设备，其特征在于，当所述网络设备根据所述第一信息配置默认DRB时，所述处理器还读取并执行所述存储器中的指令，以实现：
    向终端设备发送默认DRB的配置信息。
  30. 根据权利要求22所述的网络设备，其特征在于，所述第一信息包括第一DRB配置情况指示，所述第一DRB配置情况指示用于指示所述第二网络设备未配置默认DRB；
    所述处理器读取并执行所述存储器中的指令，以实现根据所述第一信息确定所述网络设备是否配置默认DRB，包括：
    根据所述第一DRB配置情况指示确定配置默认DRB。
  31. 根据权利要求22所述的网络设备，其特征在于，所述第一信息包括第二DRB配置情况指示，所述第二DRB配置情况指示为指示所述第二网络设备是否已经配置默认DRB的指示；
    所述处理器读取并执行所述存储器中的指令，以实现根据所述第一信息确定所述网络设备是否配置所述DRB，包括：
    在所述第二DRB配置情况指示是指示所述第二网络设备未配置默认DRB的情况下，根据所述第二DRB配置情况指示确定配置默认DRB。
  32. 根据权利要求22所述的网络设备，其特征在于，所述第一信息包括第一指示，所述第一指示用于指示第一服务质量流由所述网络设备进行承载，所述第一服务质量流为第一会话的服务质量流，所述第一会话为默认DRB对应的会话；
    所述处理器读取并执行所述存储器中的指令，以实现根据所述第一信息确定所述网络设备是否配置默认DRB，包括：
    根据所述第一指示确定配置默认DRB。
  33. 根据权利要求32所述的网络设备，其特征在于，所述第一服务质量流为所述第一会话的服务质量流中出现频率最高的服务质量流。
  34. 根据权利要求22所述的网络设备，其特征在于，所述第一信息包括第二指示，所述第二指示用于指示第一会话的全部服务质量流由所述网络设备进行承载，所述第一会话为默认DRB对应的会话；
    所述处理器读取并执行所述存储器中的指令，以实现根据所述第一信息确定所述网络设备是否配置默认DRB，包括：
    根据所述第二指示确定配置默认DRB。
  35. 根据权利要求34所述的网络设备，其特征在于，所述处理器还读取并执行所述存储器中的指令，以实现：
    通过通信接口接收所述第二网络设备发送的第二消息，所述第二消息用于通知所述网络设备所述第一会话的部分服务质量流由所述第二网络设备进行承载；
    在已经配置默认DRB的情况下，根据所述第二消息取消默认DRB的配置。
  36. 根据权利要求22所述的网络设备，其特征在于，所述第一信息包括第三指示，所述第三指示用于指示所述第二网络设备为第一会话配置的第一默认DRB转移至所述网络设备并且所述第一默认DRB承载的全部服务质量流由所述网络设备进行承载，所述第一会话为默认DRB对应的会话；
    所述处理器读取并执行所述存储器中的指令，以实现根据所述第一信息确定所述网络设备是否配置默认DRB，包括：
    根据所述第三指示确定配置默认DRB。
  37. 根据权利要求22-36任一项所述的网络设备，其特征在于，所述处理器还读取并执行所述存储器中的指令，以实现：
    确定配置默认DRB的时刻。
  38. 根据权利要求22-37任一项所述的网络设备，其特征在于，所述处理器还读取并执行所述存储器中的指令，以实现：
    在配置默认DRB之后，在释放默认DRB的情况下，向所述第二网络设备发送释放指示，所述释放指示用于指示所述网络设备已经释放默认DRB。
  39. 根据权利要求22-38任一项所述的网络设备，其特征在于，所述处理器还读取并执行所述存储器中的指令，以实现：
    在配置默认DRB之后，将默认DRB的配置信息发送给所述终端设备。
  40. 根据权利要求22-39任一项所述的网络设备，其特征在于，所述处理器还读取并执行所述存储器中的指令，以实现：
    向所述第二网络设备发送第三消息，所述第三消息用于指示所述网络设备未配置默认DRB或所述网络设备已经配置默认DRB。
  41. 根据权利要求40所述的网络设备，其特征在于，在所述网络设备未配置默认DRB的情况下，所述第三消息包括所述网络设备未配置默认DRB的原因。
  42. 根据权利要求22-41任一项所述的网络设备，其特征在于，所述网络设备为辅网络设备，所述第二网络设备为主网络设备。
  43. 一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行如权利要求1-21所述的通信方法。
  44. 一种通信装置，其特征在于，所述通信装置包括用于实现如权利要求1-21任一项所述的通信方法的单元。
  45. 一种包含指令的计算机程序产品，当其在计算机上运行时，使得所述计算机执行如权利要求1-21任一项所述的通信方法。
  46. 一种通信系统，其特征在于，所述通信系统至少包括如权利要求22-42任一项所述的网络设备和第二网络设备。
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