WO2022061916A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2022061916A1
WO2022061916A1 PCT/CN2020/118502 CN2020118502W WO2022061916A1 WO 2022061916 A1 WO2022061916 A1 WO 2022061916A1 CN 2020118502 W CN2020118502 W CN 2020118502W WO 2022061916 A1 WO2022061916 A1 WO 2022061916A1
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Prior art keywords
quality
priority
network element
bearer
service flow
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PCT/CN2020/118502
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English (en)
French (fr)
Inventor
辛阳
吴义壮
吴晓波
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华为技术有限公司
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Priority to PCT/CN2020/118502 priority Critical patent/WO2022061916A1/zh
Publication of WO2022061916A1 publication Critical patent/WO2022061916A1/zh

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    • 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]

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a communication method and device.
  • the current 3rd generation partner project (3GPP) protocol supports the fourth generation (4th generation, 4G) mobile communication technology system (that is, the evolved packet system (EPS)) and the fifth generation (4th generation, 4G) mobile communication technology system.
  • 4G fourth generation
  • EPS evolved packet system
  • 4G fifth generation
  • 5G 5th generation
  • the number of EPS bearers that an EPS can create for a terminal device is smaller than the number of QoS flows that a 5G system can create for the terminal device.
  • multiple QoS flows can be mapped to the same EPS bearer, when the number of EPS bearers mapped by the 5G system for the QoS flow of the terminal device exceeds the maximum number (for example, 9), there may be an EPS bearer identity (EPS bearer identity).
  • EBI EPS bearer identity
  • the present application provides a communication method and device for solving the problem that the EPS bearer identifier is preempted or unreasonably recycled.
  • an embodiment of the present application provides a communication method, and the method may be executed by a first communication device, and the first communication device may be a session management function network element, or a network element capable of supporting a session management function required to implement the method
  • the communication device with the function of the session management function for example, a component included in the session management function network element, or a chip system in the session management function network element, etc.
  • the method is performed by the session management function network element.
  • the method includes: in the process of creating the first quality of service flow of the terminal device in the first communication system, determining that the first quality of service flow needs to be moved to the first bearer of the second communication system, or determining the first quality of service flow It needs to be switched or redirected to the first bearer of the second communication system; when it is determined that the priority of the first quality of service flow is the largest among the priorities of the N quality of service flows corresponding to the first bearer, the connection to the first communication system
  • the incoming and mobility management function network element sends first information of the first quality of service flow, where the first information includes the priority of the first quality of service flow.
  • the access and mobility management function network element After receiving the first information, the access and mobility management function network element records (or sets or updates) the priority corresponding to the identifier of the first bearer as the priority of the first quality of service flow.
  • the N QoS flows include the first QoS flow; N is a positive integer greater than or equal to 2.
  • the session management function network element may not report to the access and mobility management The functional network element sends information, that is, the access and mobility management functional network element is not notified to update the priority. In this way, signaling overhead can be saved to a certain extent.
  • the N QoS flows are QoS flows of the terminal device in the first communication system.
  • the session management function network element sends the maximum ARP corresponding to the bearer to the access and mobility management function network element, so that the access and mobility management function network element always maintains EBI corresponds to the maximum ARP.
  • the access and mobility management function network element needs to reclaim the EBI, by comparing the ARP size of the QoS flow, the EBI corresponding to the smaller ARP can be screened out, so that the EBI can be recovered reasonably.
  • the above-mentioned quality of service flow may be a non-guaranteed bit rate quality of service flow, and the priority of the first quality of service flow may maintain priority for the allocation of the first quality of service flow level (allocation retention priority, ARP).
  • ARP allocation retention priority
  • the ARP corresponding to the bearer is updated in time according to the above method, which can effectively avoid the problem of EBI being preempted or unreasonably recycled.
  • the first information further includes: an identifier of the first bearer. That is to say, the session management function network element sends the priority of the first quality of service flow and the identifier of the first bearer corresponding to it to the access and mobility management function network element, so as to facilitate the access and mobility management function network element
  • the element searches for the corresponding priority according to the identifier of the first bearer, and updates the corresponding priority to the priority of the first quality of service flow.
  • the above method further includes:
  • second information is sent to the access and mobility management function network element, where the second information includes the priority of the second quality of service flow.
  • the access and mobility management function network element After receiving the second information, the access and mobility management function network element records the priority corresponding to the identifier of the first bearer as the priority of the second QoS flow, and the priority of the second QoS flow is N QoS flows The maximum priority of the priorities of the N-1 QoS flows except the first QoS flow.
  • the session management function network element timely notifies the access and mobility management function network element to update the maximum ARP corresponding to the bearer, so that the access and mobility management function network element is always maintained on the
  • the EBI corresponds to the maximum ARP.
  • the access and mobility management function network element needs to reclaim EBI, by comparing the size of the ARP of the quality of service flow, the EBI corresponding to the smaller ARP can be filtered out, so that the EBI can be recovered reasonably.
  • the second information further includes an identifier of the first bearer. That is to say, the session management function network element sends the priority of the second quality of service flow and the identifier of the first bearer corresponding to it to the access and mobility management function network element, so as to facilitate the access and mobility management function network element
  • the element searches for the corresponding priority according to the identifier of the first bearer, and updates the corresponding priority to the priority of the second quality of service flow.
  • the Methods before the session management function network element sends the first information of the first quality of service flow to the access and mobility management function network element of the first communication system, the Methods also include:
  • the indication information is used to indicate that the total number of identifiers of the bearers of the second communication system allocated by the access and mobility management function network element for the terminal device exceeds a set threshold; then According to the indication information, it is determined whether the total number of bearer identifiers allocated by the access and mobility management function network element to the terminal device in the second communication system exceeds a set threshold.
  • the session management function network element determines that the total number of bearer identifiers allocated to the terminal device in the second communication system does not exceed the set threshold, no notification message is sent to the access and mobility management function network element.
  • the access and mobility management function network element will not reclaim the EBI, that is, the EBI is still sufficient for the quality of service flow allocated to the terminal equipment, so even if the access and mobility management function network element does not update the ARP in time, it will not It will affect the allocation of EBI, thus saving signaling overhead to a certain extent.
  • the access and mobility management function network only when the session management function network element determines that the total number of bearer identifiers allocated to the terminal device in the second communication system exceeds a set threshold (for example, greater than or equal to 9), the access and mobility management function network The element sends the first information. Notifying the access and mobility management function network element to update the ARP according to the above method can ensure that after the EBI of the access and mobility management function network element is all allocated to the quality of service flow of the terminal equipment, the access and mobility management function network The maximum ARP corresponding to the EBI is always maintained on the element. In this way, when the access and mobility management function network element needs to recover the EBI, the EBI corresponding to the smaller ARP can be filtered out by comparing the size of the ARP of the quality of service flow. Recycle EBI.
  • the session management function network element may determine that the total number of bearer identifiers allocated by the terminal device in the second communication system exceeds a set threshold according to any of the following methods:
  • the indication information is the identifier of the bearer that is reclaimed (revoke).
  • the session management function network element sends the access and mobile
  • the mobility management function network element sends a request message, where the request message is used to request the access and mobility management function network element to allocate the identifier of the bearer of the second communication system to the third quality of service flow.
  • the access and mobility management function network element determines that the number of EPS bearers mapped for the QoS flow of the terminal device exceeds a set threshold (eg, 9), the EBI is recovered for the third QoS flow and sent to the session management function The network element sends the revoked EBI, so that the session management function network element can determine the total number of identities of the bearers of the second communication system allocated by the access and mobility management function network element for the terminal device according to the recovered EBI exceeds the set threshold. Compared with the following two possible situations, this method can save signaling.
  • a set threshold eg, 9
  • the indication information is control plane signaling, for example, a bit of "1" indicates that the total number of identities of the bearers of the second communication system allocated by the access and mobility management function network element for the terminal device exceeds The threshold is set. On the contrary, if the bit is "0", it means that the total number of identifiers of the bearers of the second communication system allocated by the access and mobility management function network element to the terminal device is less than or equal to the set threshold.
  • the session management function network element sends a query request to the access and mobility management function network element, where the query request is used to request to query the second communication allocated by the access and mobility management function network element for the terminal device Whether the total number of identities carried by the system exceeds the set threshold; the access and mobility management function network element will send a query response to the session management function network element, and the query response includes the query result of whether the total number of bearer identities exceeds the set threshold value.
  • the access and mobility management function network element is notified to update the ARP, which can ensure that After the EBI of the access and mobility management function network element is all allocated to the quality of service flow of the terminal equipment, the access and mobility management function network element always maintains the maximum ARP corresponding to the EBI.
  • the management function network element needs to recover EBI, by comparing the size of the ARP of the quality of service flow, the EBI corresponding to the smaller ARP can be filtered out, so as to reasonably recover the EBI.
  • the session management function network element may select auxiliary information (single network slice) according to the existence of the interface, operator policy, and single network slice selection between the access and mobility management function network element and the mobility management entity of the second communication system.
  • auxiliary information single network slice
  • At least one of network slice selection assistance information, S-NSSAI), data network name (DNN), and the policy and charging control rule corresponding to the first quality of service flow it is determined that the first quality of service flow needs to be moved to the first The first bearer of the second communication system.
  • the SMF+PGW-C supports Interworking between the 5G system and EPS, and the first non-GBR QoS according to the existence of the N26 interface between the AMF and the MME, the DNN or S-NSSAI of the session where the first non-GBR QoS flow is located, and so on.
  • One or a combination of the QoS parameters corresponding to the flow, the SMF local operator policy, etc. determine that the first non-GBR QoS flow needs to be switched from the 5G system to the EPS, and the first non-GBR QoS flow is mapped to the currently allocated flow EPS Bearer ID (such as EPS Bearer X) corresponding to the EPS Bearer.
  • EPS Bearer ID such as EPS Bearer X
  • the above method helps to determine whether the terminal device moves (including handover or redirection) from the 5G communication system to the 4G communication system, so as to update the ARP corresponding to the EBI in this scenario in time.
  • an embodiment of the present application also provides a communication method, the method can be applied to the first communication device, and the method includes:
  • the access and mobility management function network element In the process of releasing the first quality of service flow in the first communication system of the terminal device, it is determined that the first quality of service flow needs to be moved to the first bearer of the second communication system, or it is determined that the first quality of service flow needs to be switched or reset Directing to the first bearer of the second communication system; sending second information to the access and mobility management function network element, the second information including the priority of the second quality of service flow.
  • the access and mobility management function network element After receiving the second information, the access and mobility management function network element records the priority corresponding to the identifier of the first bearer as the priority of the second quality of service flow, the priority of the second quality of service flow is the maximum priority of priorities of N-1 QoS flows other than the first QoS flow among the N QoS flows.
  • the N quality of service flows are quality of service flows of the terminal device in the first communication system.
  • the session management function network element timely notifies the access and mobility management function network element to update the maximum ARP corresponding to the bearer, so that the access and mobility management function network element always maintains the maximum ARP corresponding to the EBI.
  • the access and mobility management function network element needs to reclaim EBI, by comparing the size of the ARP of the quality of service flow, the EBI corresponding to the smaller ARP can be filtered out, so that the EBI can be recovered reasonably.
  • an embodiment of the present application provides a communication method, which can be applied to a second communication device, where the second communication device may be an access and mobility management function network element, or a network element capable of supporting access and mobility management functions
  • the second communication device may be an access and mobility management function network element, or a network element capable of supporting access and mobility management functions
  • a communication device for the network element to implement the functions required by the method such as the components included in the access and mobility management function network element, or the chip system in the access and mobility management function network element, etc.
  • the method may Executed by an access and mobility management function network element, the method includes:
  • the priority of the first quality of service flow is received; the priority of the first quality of service flow is established with the first quality of service flow in the second communication system
  • N is a positive integer greater than or equal to 2
  • the N QoS flows include the first QoS flow.
  • the N quality of service flows are quality of service flows of the terminal device in the first communication system.
  • the access and mobility management function network element can store the ARPs of each QoS flow corresponding to the same EBI according to the above method, for example, maintain the ARP list corresponding to the same EBI. In this way, when the access and mobility management function network element needs to recover the EBI , by comparing the size of the ARP of the quality of service flow, the EBI corresponding to the smaller ARP can be filtered out, so as to reasonably recover the EBI.
  • the method further includes:
  • the priority of receiving the second quality of service flow when it is determined that the total number of bearer identifiers allocated by the access and mobility management function network element to the terminal device in the second communication system exceeds the set threshold, according to the priority of the second quality of service flow
  • the priority and the maximum priority among the N QoS flows determine whether to establish a corresponding relationship between the priority of the second QoS flow and the identifier of the bearer. In other words, only when the priority of the access and mobility management function network element in the second QoS flow is greater than the maximum priority among the N QoS flows, it is determined to reclaim the EBI and re-allocate the EBI to the second QoS flow.
  • the corresponding relationship between the second QoS flow and the EBI is established; when the priority of the access and mobility management function network element in the second QoS flow is not greater than the maximum of the N QoS flows When the priority is set, the EBI will not be recovered, nor will the EBI be allocated to the second QoS flow, so the corresponding relationship between the second QoS flow and the EBI will not be established. It can be seen that when the access and mobility management function network element needs to recover EBI, by comparing the ARP size of the quality of service flow, the EBI corresponding to the smaller ARP can be filtered out, so as to reasonably recover the EBI.
  • the method further includes: when it is determined that the first quality of service flow needs to be released, deprioritizing the first quality of service flow and the first quality of service flow The correspondence between the identifiers of the corresponding bearers in the second communication system.
  • the ARP corresponding to the EBI in the latest state is always maintained on the network element of the access and mobility management function.
  • the access and mobility management function network element needs to reclaim EBI, by comparing the size of the ARP of the quality of service flow, the EBI corresponding to the smaller ARP can be filtered out, so that the EBI can be recovered reasonably.
  • an embodiment of the present application provides a communication method, which can be applied to the above-mentioned first communication device, and the method includes:
  • the priority of the first quality of service flow is received; the priority of the first quality of service flow is established with the first quality of service flow in the second communication system
  • N is a positive integer greater than or equal to 2
  • the N QoS flows include the first QoS flow.
  • the N quality of service flows are quality of service flows of the terminal device in the first communication system.
  • the session management function network element can store the ARPs corresponding to each QoS flow of the same EBI according to the above method, for example, maintain the ARP list corresponding to the same EBI. In this way, when the access and mobility management function network element needs to recover the EBI, the session management function The network element can determine whether the EBI can be recovered by comparing the ARP size of the QoS flow, so that the access and mobility management function network element reasonably recovers the EBI according to the instruction of the session management function network element.
  • the method further includes: when it is determined that the first quality of service flow needs to be released, deprioritizing the first quality of service flow and the first quality of service flow in the second The correspondence between the identifiers of the corresponding bearers in the communication system.
  • the ARP corresponding to the EBI in the latest state is always maintained on the network element of the session management function.
  • the method further includes: receiving a request message from an access and mobility management function network element, where the request message includes an identifier of the bearer requested to be reclaimed and a first A priority, the first priority is the priority of the identifier to be preempted; determine the maximum priority with the first priority less than the priorities of N QoS flows, where the N QoS flows all correspond to the bearer identifiers, and N is a positive integer greater than or equal to 2;
  • a response message is sent to the access and mobility management function network element, where the response message includes indication information, and the indication information is used to refuse to reclaim the bearer's identifier.
  • the session management function network element can determine whether the EBI can be recovered by comparing the ARP size of the quality of service flow, so that the access and mobility management function network element can determine whether the EBI can be recovered.
  • the network element of the sex management function reasonably recovers the EBI according to the instruction of the network element of the session management function.
  • the response message may further include a maximum priority of the priorities of the N QoS flows, and the maximum priority is used for the access and mobility management function network element
  • the priority corresponding to the identifier of the first bearer is recorded as the maximum priority. So that when the access and mobility management function network element needs to recover EBI, by comparing the size of the ARP of the quality of service flow, the EBI corresponding to the smaller ARP can be filtered out, so as to reasonably recover the EBI.
  • an embodiment of the present application provides a communication method, which can be applied to the above-mentioned first communication device, and the method includes:
  • the request message includes an identifier of a bearer to be reclaimed and a priority corresponding to the identifier of the bearer;
  • the priority corresponding to the identifier of the bearer is less than or equal to the maximum priority of the priorities of N QoS flows, and a negative response message is sent to the access and mobility management function network element, where the negative response message includes an indication information, the indication information is used to refuse to reclaim the bearer's identifier.
  • the priority corresponding to the identifier of the bearer is less than or equal to the maximum priority of the priorities of the N QoS flows, and a positive response message is sent to the access and mobility management function network element, where the positive response message includes Indication information, which is used to agree to reclaim the bearer's identifier.
  • the N QoS flows all correspond to bearer identifiers, and N is a positive integer greater than or equal to 2; the N QoS flows are the QoS flows of the terminal device in the first communication system.
  • the session management function network element can determine whether the EBI can be recovered by comparing the ARP size of the quality of service flow, so that the access and mobility management function network element can determine whether the EBI can be recovered.
  • the network element of the sex management function reasonably recovers the EBI according to the instruction of the network element of the session management function.
  • the response message further includes a maximum priority of priorities of the N QoS flows, where the maximum priority is used for the access and mobility
  • the network element of the property management function records the priority corresponding to the identifier of the first bearer as the maximum priority. So that when the access and mobility management function network element needs to recover EBI, by comparing the size of the ARP of the quality of service flow, the EBI corresponding to the smaller ARP can be filtered out, so as to reasonably recover the EBI.
  • an embodiment of the present application provides a communication method, which can be applied to the above-mentioned first communication device, and the method includes:
  • N is a positive integer greater than or equal to 2;
  • a request message is sent to the access and mobility management function network element of the second communication system, the request message is used to request the identification of the bearer of the second communication system allocated for the first quality of service flow, and the request message includes the maximum priority.
  • AMF can also directly determine whether the EBI can be recovered by comparing the ARP size between the QoS flows. , no need to negotiate with the session management function network element.
  • the quality of service flow is a non-guaranteed bit rate quality of service flow
  • the priority may be ARP.
  • a request message is sent to the NWDAF, where the request message includes the service identifier of the first quality of service flow;
  • the NWDAF Receive a response message from the NWDAF, where the response message includes the M service identifiers and/or the priority corresponding to each of the M service identifiers, where M is greater than or equal to N-1, and M is positive integer;
  • the M service identifiers and the service identifier of the first quality of service flow determine the The priority of N-1 quality of service flows of the terminal device related to the service identifier of the first quality of service flow.
  • the present application provides a first communication device, and the device may be a session management function network element or a chip in the session management function network element.
  • the device has the function of implementing each embodiment of the first aspect, the second aspect, the fourth aspect, the fifth aspect or the sixth aspect. This function can be implemented by hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the session management function network element when the apparatus is a session management function network element, the session management function network element includes: a transceiver unit, optionally, a processing unit.
  • the processing unit may be, for example, a processor
  • the receiving unit may be, for example, a receiver
  • the transmitting unit may be, for example, a transmitter
  • the receiver and transmitter include radio frequency circuits.
  • the session management function network element further includes a storage unit, and the storage unit may be, for example, a memory.
  • the session management function network element includes a storage unit
  • the storage unit stores computer execution instructions
  • the processing unit is connected to the storage unit, and the processing unit executes the computer execution instructions stored in the storage unit, so that the session management function network element
  • the method of any one of the first, second, fourth, fifth or sixth aspects above is performed.
  • the chip when the device is a chip in the session management function network element, the chip includes: a receiving unit and a sending unit, and optionally, a processing unit.
  • the processing unit may be, for example, a processing circuit
  • the receiving unit may be, for example, an input interface, a pin or a circuit, or the like
  • the sending unit may be, for example, an output interface, a pin, or a circuit, or the like.
  • the processing unit can execute the computer-executed instructions stored in the storage unit, so that the sending method of any one of the first aspect, the second aspect, the fourth aspect, the fifth aspect or the sixth aspect is performed.
  • the storage unit is a storage unit in the chip, such as a register, a cache, etc.
  • the storage unit may also be a storage unit in the terminal located outside the chip, such as a read-only memory (read only memory).
  • -only memory read only memory
  • ROM read only memory
  • RAM random access memory
  • processors mentioned in any of the above may be a general-purpose central processing unit (Central Processing Unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more An integrated circuit for controlling program execution of the method of the first aspect, the second aspect, the fourth aspect, the fifth aspect or the sixth aspect.
  • CPU Central Processing Unit
  • ASIC application-specific integrated circuit
  • the present application provides a second communication device, which may be an access and mobility management function network element, or a chip in the access and mobility management function network element.
  • the device has the function of implementing the various embodiments of the third aspect above. This function can be implemented by hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the access and mobility management function network element when the apparatus is an access and mobility management function network element, includes: a transceiver unit, optionally, a processing unit.
  • the processing unit may be, for example, a processor
  • the receiving unit may be, for example, a receiver
  • the transmitting unit may be, for example, a transmitter
  • the receiver and transmitter include radio frequency circuits.
  • the access and mobility management function network element further includes a storage unit, and the storage unit may be, for example, a memory.
  • the access and mobility management function network element includes a storage unit
  • the storage unit stores computer-executable instructions
  • the processing unit is connected to the storage unit, and the processing unit executes the computer-executable instructions stored in the storage unit to make the connection
  • the ingress and mobility management function network element executes the method of any one of the third aspect above.
  • the chip when the device is a chip in an access and mobility management function network element, the chip includes: a receiving unit and a sending unit, and optionally, a processing unit.
  • the processing unit may be, for example, a processing circuit
  • the receiving unit may be, for example, an input interface, a pin or a circuit, and the like
  • the sending unit may be, for example, an output interface, a pin, or a circuit, and the like.
  • the processing unit can execute the computer-executed instructions stored in the storage unit, so that the sending method of any one of the above third aspects is executed.
  • the storage unit is a storage unit in the chip, such as a register, a cache, etc.
  • the storage unit may also be a storage unit in the terminal located outside the chip, such as a read-only memory (read only memory).
  • -only memory read only memory
  • ROM read only memory
  • RAM random access memory
  • processors mentioned in any of the above may be a general-purpose central processing unit (Central Processing Unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more An integrated circuit for controlling program execution of the method of the third aspect.
  • CPU Central Processing Unit
  • ASIC application-specific integrated circuit
  • the present application provides a communication system, including the first communication device in any of the design examples of the seventh aspect and the second communication device in any of the design examples of the eighth aspect.
  • the communication system further includes a network data analysis function (network data analytics function, NWDAF) network element.
  • NWDAF network data analytics function
  • the first communication system may be a 5G communication system
  • the second communication system may be a 4G communication system.
  • an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, for implementing any of the foregoing first, second, fourth, fifth, or sixth aspects.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • an embodiment of the present application provides a chip system, where the chip system includes a processor, and may further include a memory, for implementing the method executed by the second communication apparatus in any one of the design examples of the third aspect.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • the embodiments of the present application further provide a computer-readable storage medium, where a computer program or instruction is stored in the storage medium, and when the computer program or instruction is executed, any design example of the first aspect can be implemented A method performed by a first communication device in .
  • the embodiments of the present application further provide a computer-readable storage medium, in which a computer program or instruction is stored, and when the computer program or instruction is executed, any design example of the second aspect can be implemented A method performed by a first communication device in .
  • the embodiments of the present application further provide a computer-readable storage medium, where a computer program or instruction is stored in the storage medium, and when the computer program or instruction is executed, any design example of the fourth aspect can be implemented A method performed by a first communication device in .
  • the embodiments of the present application further provide a computer-readable storage medium, where a computer program or instruction is stored in the storage medium, and when the computer program or instruction is executed, any design example of the fifth aspect can be implemented A method performed by a first communication device in .
  • the embodiments of the present application further provide a computer-readable storage medium, where a computer program or instruction is stored in the storage medium, and when the computer program or instruction is executed, any design example of the sixth aspect can be implemented A method performed by a first communication device in .
  • the embodiments of the present application further provide a computer-readable storage medium, where a computer program or instruction is stored in the storage medium, and when the computer program or instruction is executed, any design example of the third aspect can be implemented A method performed by a second communication device.
  • the embodiments of the present application further provide a computer program product, including instructions, which, when run on a computer, cause the computer to execute the first aspect, the second aspect, the fourth aspect, the fifth aspect or the first aspect A method performed by the first communication apparatus in any one of the six aspects of the design example.
  • the embodiments of the present application further provide a computer program product, including instructions, which, when run on a computer, cause the computer to execute the method executed by the first communication device in any one of the design examples of the third aspect above .
  • FIG. 1 is a schematic diagram of a network architecture to which an embodiment of the present application is applicable;
  • FIG. 2 is a schematic diagram of a PDN connection provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a PDU session provided by an embodiment of the present application.
  • Fig. 4 is a kind of schematic flow chart of allocating EBI
  • 5A to 5C are schematic diagrams of mapping relationships between EBI and quality of service flows provided by the present application.
  • FIG. 6 is a schematic diagram of a first communication method provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a second communication method provided by an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of a third communication method provided by an embodiment of the present application.
  • FIG. 9 is a schematic flowchart of a fourth communication method provided by an embodiment of the present application.
  • FIGS. 10A and 10B are schematic structural diagrams of a first communication apparatus provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a second communication apparatus provided by an embodiment of the present application.
  • FIG. 12 is another schematic structural diagram of a communication apparatus provided by an embodiment of the present application.
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • 5G fifth generation
  • NR new radio
  • a communication system may also be referred to as a first network or a first standard system, and a second communication system may also be referred to as a second network or a second standard system.
  • the first communication system may be a 5G communication system
  • the second communication system may be a 4G communication system, wherein the 5G communication system may also be referred to as a 5G network or a 5G system for short
  • a 4G communication system may also be referred to as an EPS network or abbreviated as a 5G system. 4G system.
  • the first communication system and the second communication system in the embodiments of the present application may also be other types of communication systems, which are not limited in the present application.
  • FIG. 1 is a schematic diagram of a possible network architecture applicable to the embodiment of the present application, in the network architecture, a 5G network and an EPS network coexist. Below, the main network elements involved in the network architecture will be described.
  • An EPS network can include the following network elements:
  • (wireless) access network radio access network, (R)AN) network element: used to provide network access functions for authorized terminal equipment in a specific area, and can use different quality of transport tunnel.
  • the (R)AN network element can manage wireless resources, provide access services for terminal equipment, and then complete the forwarding of control signals and terminal equipment data between the terminal equipment and the core network.
  • the (R)AN network element can also be understood as a traditional network. in the base station.
  • the (R)AN network element may also be called an evolved universal terrestrial radio access network (E-UTRAN) or an evolved base station (eNB), as shown in Figure 1. Show.
  • E-UTRAN evolved universal terrestrial radio access network
  • eNB evolved base station
  • network element may also be referred to as an entity, a device, an apparatus, or a module, etc., which is not particularly limited in this application.
  • the description of “network element” is omitted in some descriptions.
  • the (R)AN network element is referred to as RAN for short.
  • the “(R)AN network “Element” should be understood as (R)AN network element or (R)AN entity, and below, the description of the same or similar situations is omitted.
  • the mobility management entity (mobility management entity, MME) is used to provide the function of mobility management.
  • MME can also provide functions such as lawful interception and access authorization/authentication.
  • SGW Serving gateway
  • PGW-U packet data network gateway user function
  • PGW-C packet data network gateway control function
  • PCRF policy and charging rules function
  • a home subscriber server including user profiles, is used to perform user authentication and authorization, and can provide information about the user's physical location.
  • a 5G network can include the following network elements:
  • (R)AN network element It is used to provide network access functions for authorized terminal equipment in a specific area, and can use different quality transmission tunnels according to the level of terminal equipment and service requirements.
  • the (R)AN network element can also be called the next generation radio access network (NG-RAN, as shown in Figure 1) or the next generation base station (gNB).
  • NG-RAN next generation radio access network
  • gNB next generation base station
  • Access and mobility management function a function for access management and mobility management.
  • AMF can also provide functions such as legal interception and access authorization/authentication.
  • the AMF can communicate with the MME through the N26 interface.
  • the letters and numbers of the attachments between the network elements represent the names of the communication interfaces between the network elements.
  • the communication interfaces between the network elements may also have other names, which are not incorporated herein by reference in this application. not limited.
  • UPF User plane function
  • QoS quality of service
  • Session management function mainly used for session management, Internet Protocol (IP) address allocation and management of terminal equipment, selection and management of user plane functions.
  • IP Internet Protocol
  • the SMF can also be the termination point of the policy control and charging functional interface.
  • PCF Policy control function
  • AMF Access Management Function
  • SMF Session Management Function
  • Unified data management unified data management, UDM
  • UDM Unified data management
  • network elements with the same or similar functions can be jointly set or deployed in one.
  • UPF and PGW-U can be co-located in one device or separately deployed in different devices
  • SMF and PGW-C can be co-located in one device or separately deployed in different devices
  • PCF and PCRF can be co-located In one device or separately deployed in different devices
  • HSS and UDM can be co-located in one device or separately deployed in different devices.
  • the "+" in the following and in the figure means that the two devices can be co-located.
  • the above network elements or functions may be either network elements in hardware devices, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (eg, a cloud platform).
  • the UE and the network establish a PDN connection (PDN connection). At least one bearer can be established in each PDN connection.
  • PDN connection The internal structure of the PDN connection is shown in Figure 2. The main features are as follows:
  • One PDN connection corresponds to one access point name (APN) and the aggregated maximum bit rate (APN-AMBR) of one access point name.
  • the APN and APN AMBR are obtained from the HSS during the UE attachment process and the MME during the location request process.
  • EPS bearer there is one and only one default evolved packet system bearer (default EPS bearer), which is created during the establishment of the PDN connection.
  • At least one service data stream (Service Data stream s) can be aggregated in a default EPS bearer. , SDF);
  • a PDN connection may also include one or more non-guaranteed bit rate EPS bearer (Non guaranteed bit rate EPS bearer, Non GBR EPS bearer), a dedicated evolved packet system bearer initiated by the UE or the network side (dedicated EPS bearer) is created during the establishment process.
  • non-guaranteed bit rate EPS bearer Non guaranteed bit rate EPS bearer, Non GBR EPS bearer
  • a dedicated evolved packet system bearer initiated by the UE or the network side (dedicated EPS bearer) is created during the establishment process.
  • a non-GBR EPS bearer has at least one SDF, and can also aggregate one or more other SDFs; a PDN connection can also include one or more guaranteed bit rate evolution packet system bearers (guaranteed bit rate EPS bearer, GBR EPS bearer), created during the establishment of a dedicated EPS bearer initiated by the UE or the network side.
  • GBR EPS bearer has at least one SDF, and can also aggregate one or more other SDFs.
  • each bearer in FIG. 2 has a corresponding QoS parameter and is used to transmit the corresponding SDF.
  • the MME network element will allocate an EPS bearer identity (EPS bearer identity, EBI) to each bearer, and send the EPS bearer identity to the UE in the process of establishing the bearer.
  • EPS bearer identity EPS bearer identity
  • EBI EPS bearer identity
  • the EPS bearer ID is sent to the UE during the establishment of the PDN connection
  • the EPS bearer ID (bearer ID) is sent to the UE during the establishment of the dedicated bearer.
  • the QoS parameters of the default bearer are different from those of the dedicated bearer, and the QoS parameters corresponding to different types of EPS bearers are shown in Table 1.
  • the UE and the network establish a PDU Session (PDU Session).
  • PDU Session At least one quality of service flow (QoS flow) can be established in each PDU session.
  • QoS flow quality of service flow
  • the internal structure of the PDU session is shown in Figure 3. The main features are as follows:
  • a PDU session corresponds to a DNN, a PDU Session ID (PDU Session ID), and a session aggregate maximum bit rate (Session aggregate maximum bit rate, Session AMBR).
  • DNN and Session AMBR are obtained from UDM in the process of UE registration and AMF in the process of location request;
  • PDU Session ID is allocated by SMF network element in the process of establishing PDUSession initiated by UE;
  • a PDU session there is one and only one default QoS flow (default QoS flow), which is created during the establishment of the PDU session, and at least one SDF can be aggregated in a default QoS flow.
  • a PDU session may also include one or more non-guaranteed bit rate evolved packet system quality of service flows (Non GBR QoS flows), which are created during the modification process of the PDU Session initiated by the UE or the network side.
  • Non GBR QoS flows non-guaranteed bit rate evolved packet system quality of service flows
  • There is at least one SDF in a non-GBR QoS flow and multiple SDFs can also be aggregated.
  • a PDU session may also contain one or more guaranteed bit rate evolved packet system quality of service flows (GBR QoS flows), which are created during the modification process of the PDU Session initiated by the UE or the network side.
  • GBR QoS flows may contain at least one SDF. , it is also possible to aggregate multiple SDFs.
  • each QoS flow in FIG. 3 has corresponding QoS parameters and is used to transmit the corresponding service data flow.
  • the SMF network element will assign a quality of service flow identifier (QoS flow ID, QFI) to each QoS flow, and send the QFI to the UE.
  • QFI quality of service flow identifier
  • the QFI is sent to the UE during the establishment of the PDU session, and for the dedicated QoS flow, the QFI is sent to the UE during the establishment of the dedicated QoS flow.
  • the QoS parameters of the default QoS flow and the QoS parameters of the dedicated QoS flow are different, and the QoS parameters corresponding to different types of QoS flows are shown in Table 2.
  • the QoS parameters in Table 1 and Table 2 are only examples.
  • the QoS parameters may include one or more of the foregoing parameters, which are not limited in this embodiment of the present application.
  • the PDU session corresponds to the PDN connection
  • the EPS bearer corresponds to the QoS flow.
  • the corresponding relationship is shown in Table 3.
  • the terminal device can move from the 4G communication system (including handover or redirection) to the 5G communication system, or can also move from the 5G communication system (including handover or redirection) to the 4G communication system.
  • the terminal device is a device with wireless communication function, which can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as airplanes). , balloons, satellites, etc.).
  • the terminal can be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, an industrial control (industrial control) terminal wireless terminal in self-driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart grid
  • the SMF+PGW-C determines that the QoS flow needs to be switched from 5G to 4G, it requests the AMF to allocate an EPS bearer ID for the QoS flow.
  • the EPS Bearer ID allocation process includes the following steps:
  • Step 401 the SMF+PGW-C triggers the EPS bearer identification assignment request (Namf_Communication_EBIAssignment Request) service to the AMF, and requests the AMF to assign an EPS Bearer ID.
  • EPS bearer identification assignment request (Namf_Communication_EBIAssignment Request) service to the AMF, and requests the AMF to assign an EPS Bearer ID.
  • the service operation carries the terminal identification SUPI of the terminal to which the QoS flow belongs, the session identification PDU Session ID of the session of the terminal to which the QoS flow belongs, and the priority ARP corresponding to the QoS flow. It should be noted that if SMF+PGW-C decides that EPS bearer ID needs to be allocated for each QoS flow in the multiple QoS flows created in the session, then the service operation carries an ARP list, which includes multiple QoS flows. ARP for QoS flows.
  • Step 402 the AMF allocates an EPS Bearer ID to the terminal according to the SMF+PGW-C request.
  • the AMF responds to the service operation request of the SMF+PGW-C, triggers the EPS bearer identification assignment response (Namf_Communication_EBIAssignment Response) service to the SMF+PGW-C, and sends the assigned EPS Bearer ID to the SMF+PGW-C.
  • the AMF also needs to send the ARP corresponding to each EPS Bearer ID to the SMF+PGW-C , so that SMF+PGW-C can determine which EBI corresponds to which ARP.
  • AMF can maintain an EBI table for each PDU Session of each terminal, as shown in Table 4. It can be obtained from Table 4 that each ARP in each session of each terminal is mapped with an EPS Bearer ID.
  • the current protocol stipulates that if SMF+PGW-C allocates an EPS Bearer ID to a dedicated EPS Bearer corresponding to a GBR QoS flow, there is one and only one GBR QoS flow corresponding to the EPS Bearer ID, as shown in Figure 5A.
  • the default non-GBR QoS flow corresponds to an EPS Bearer ID (default EPS bearer on the 4G side).
  • SMF+PGW-C can also dedicate some non-GBR
  • the QoS flow is mapped to the same default EPS Bearer as the default non-GBR QoS flow.
  • SMF is the first dedicated non-GBR QoS flow of the first PDU session of terminal A (assuming ARP is 1) to request the AMF for allocation to obtain the first EBI, and then the terminal's
  • the second dedicated non-GBR QoS flow of the first PDU session (assuming ARP is 4) is created, SMF maps the second dedicated non-GBR QoS flow to the first EBI, but does not notify AMF to update ARP, which is maintained on AMF
  • the ARP corresponding to the EPS bearer identifier is still 1, as shown in Table 5.
  • AMF In the existing resource recovery mechanism, if AMF has allocated 9 EPS Bearer IDs to a terminal, and finds that there is an EBI application request for a new QoS flow for the terminal, and the ARP carried in the EBI application request If it is higher than one or more of the ARPs corresponding to the 9 EBIs that have been allocated, then the AMF will reclaim the EPS bearer identifier corresponding to the lowest ARP among the 9 EBIs and assign it to the newly applied QoS flow of the terminal. .
  • the AMF reclaims the first EBI and then assigns it to the third dedicated non-GBR QoS flow. reasonable. Therefore, for the scenario shown in Figure 5C, the EPS bearer identity (EPS bearer identity, EBI) has the problem of being preempted or unreasonably recycled.
  • EPS bearer identity EBI
  • an embodiment of the present application provides a communication method, which can update the ARP corresponding to the EBI maintained on the AMF in time, so as to ensure that the EBI resources are reasonably recycled or occupied.
  • the first communication system is a 5G network and the second communication system is an EPS network as an example for description.
  • FIG. 6 is a flowchart of the method.
  • the method is applied to the network architecture shown in FIG. 1 as an example.
  • the method may be performed by a first communication device, which may be a session management function network element, or a communication device capable of supporting a session management function network element to implement the functions required by the method, such as a session management function network element
  • a first communication device which may be a session management function network element, or a communication device capable of supporting a session management function network element to implement the functions required by the method, such as a session management function network element
  • the communication method provided by the embodiment of the present application is described in detail by taking the method performed by a session management function network element as an example, and the session management function network element may refer to a network jointly set up by the SMF and the PGW-C. Yuan.
  • FIG. 6 is a schematic flowchart of a communication method provided by an embodiment of the present application, and the method may include the following steps.
  • Step 601 During the process of creating the first QoS flow of the terminal device in the first communication system, the session management function network element determines that the first QoS flow needs to be moved to the first bearer of the second communication system.
  • the network element of the session management function determines that the first quality of service flow needs to be switched or redirected to the second communication system. first bearer.
  • the session management function network element is based on the existence of interfaces, operator policies, and single network slice selection assistance information between the access and mobility management function network element and the mobility management entity of the second communication system.
  • S-NSSAI S-NSSAI
  • data network name data network name, DNN
  • at least one of the policy and charging control rule corresponding to the first quality of service flow determine that the first quality of service flow needs to be moved to the second communication system a load.
  • the SMF+PGW-C supports the interworking (Interworking) between the 5G system and the EPS according to the existence of the N26 interface between the AMF and the MME, the DNN or S-NSSAI of the session in which the first non-GBR QoS flow is located, and the first One or a combination of the QoS parameters corresponding to the non-GBR QoS flow, the SMF local operator policy, etc., it is determined that the first non-GBR QoS flow needs to be switched from the 5G system to the EPS, and the first non-GBR QoS flow is mapped to the EPS Bearer corresponding to the currently allocated EPS Bearer ID (such as EPS Bearer X).
  • EPS Bearer ID such as EPS Bearer X
  • the terminal device or the policy control function network element will trigger the session management function network element to create the first quality of service flow.
  • the UE or the PCF triggers the first non-GBR QoS flow establishment procedure to the SMF+PGW-C in the PDU Session Modification procedure.
  • the SMF+PGW-C may receive an establishment request message of the first non-GBR QoS flow from the PCF, where the establishment request message includes the ARP of the first non-GBR QoS flow .
  • the SMF+PGW-C may receive the establishment request message of the first non-GBR QoS flow from the UE, and then the SMF obtains the ARP of the first non-GBR QoS flow from the PCF.
  • Step 602 The network element of the session management function determines that the priority of the first QoS flow is the highest among the priorities of the N QoS flows corresponding to the first bearer.
  • the N quality of service flows are quality of service flows of the terminal device in the first communication system. It should be noted that, before performing the above step 602, the network element of the session management function saves the correspondence between the priorities of N QoS flows and the identifier of the first bearer, that is, in each QoS flow During the creation process, the session management function network element will record the corresponding relationship between the priority of the quality of service flow and the identifier of the assigned bearer. For the specific process, please refer to the corresponding relationship generation process in Embodiment 3. Here It will not be repeated.
  • the N QoS flows include at least one other QoS flow in addition to the first QoS flow, that is, N is a positive integer greater than 2.
  • the N QoS flows include the first dedicated non-GBR QoS flow (ie, the first QoS flow) shown in Table 6, as well as the second dedicated non-GBR QoS flow and the third dedicated non-GBR QoS flow , where the three dedicated non-GBR QoS flows all correspond to the first EBI, the ARP of the first dedicated non-GBR QoS flow is 4, the ARP of the second dedicated non-GBR QoS flow is 2, and the ARP of the third dedicated non-GBR QoS flow is 2 The ARP of the flow is 1, so the ARP of the first dedicated non-GBR QoS flow is the largest of the three dedicated non-GBR QoS flows.
  • Step 603 The session management function network element sends the first information of the first quality of service flow to the access and mobility management function network element of the first communication system.
  • the first information includes the priority of the first quality of service flow.
  • the SMF+PGW-C sends the ARP for the first dedicated non-GBR QoS flow to the AMF.
  • the first information further includes an identifier of the first bearer.
  • the SMF+PGW-C sends the ARP of the first dedicated non-GBR QoS flow and the first EBI corresponding thereto to the AMF.
  • Step 604 The access and mobility management function network element records the priority corresponding to the identifier of the first bearer as the priority of the first quality of service flow.
  • the access and mobility management function network element sets or updates the priority corresponding to the identifier of the first bearer to the priority of the first quality of service flow.
  • the second dedicated non-GBR QoS flow is created before the first dedicated non-GBR QoS flow, and before the first dedicated non-GBR QoS flow is created, the first dedicated non-GBR QoS flow saved in the AMF.
  • the ARP corresponding to the EBI is the ARP of the second dedicated non-GBR QoS flow (ARP is 2). As shown in Table 7.
  • the AMF After the AMF receives the ARP of the first dedicated non-GBR QoS flow from SMF+PGW-C, the AMF updates the ARP corresponding to the first EBI to the ARP of the first dedicated non-GBR QoS flow (ARP is 4), as shown in the table 8 shown.
  • the ARP corresponding to the first EBI on the AMF is always the largest. Therefore, when the AMF recycles the EBI, according to the existing recycling mechanism, the EBI corresponding to the smaller ARP can be determined by comparing the ARP size of the dedicated non-GBR QoS flow. , so as to reasonably recover EBI.
  • Step 605 the session management function network element determines that the first quality of service flow needs to be released.
  • the terminal device or the policy control function network element will trigger the session management function network element to release the first quality of service flow.
  • the UE or the PCF triggers the first non-GBR QoS flow release procedure to the SMF+PGW-C in the PDU Session Modification procedure.
  • the SMF+PGW-C determines that the first QoS flow needs to be released.
  • Step 606 the session management function network element sends second information to the access and mobility management function network element, where the second information includes the priority of the second quality of service flow.
  • the priority of the second quality of service flow is the maximum priority of the priorities of N-1 quality of service flows other than the first quality of service flow among the N quality of service flows.
  • the SMF+PGW-C selects the second dedicated non-GBR QoS flow and the third non-GBR QoS flow from the first dedicated non-GBR QoS flow among the three dedicated non-GBR QoS flows shown in Table 6. In the flow, it is determined that the maximum ARP among the ARPs of the remaining two dedicated non-GBR QoS flows is 2, so the SMF+PGW-C sends the ARP of the second dedicated non-GBR QoS flow to the AMF (ARP is 2).
  • the second information further includes an identifier of the first bearer.
  • the SMF+PGW-C sends the ARP of the second dedicated non-GBR QoS flow (the ARP is 2) and the corresponding first EBI to the AMF.
  • Step 607 The access and mobility management function network element records the priority corresponding to the identifier of the first bearer as the priority of the second QoS flow.
  • the access and mobility management function network element sets or updates the priority corresponding to the identifier of the first bearer to the priority of the first quality of service flow.
  • the AMF updates the ARP corresponding to the first EBI to the ARP of the second dedicated non-GBR QoS flow (the ARP is 2).
  • the creation process of the first quality of service flow shown in the above steps 601 to 604 and the release process of the first quality of service flow shown in the steps 605 to 607 can be performed except for the dedicated non-GBR QoS flow. , also for proprietary GBR QoS flows.
  • the descriptions about the dedicated non-GBR QoS flow in the present invention are all applicable to the dedicated GBR QoS flow, and are not repeated here.
  • the session management function network element may also perform step 608.
  • Step 608 the session management function network element needs to determine that the total number of bearer identifiers allocated by the access and mobility management function network element to the terminal device in the second communication system exceeds the set threshold.
  • the session management function network element determines that the total number of bearer identifiers allocated by the access and mobility management function network element to the terminal device in the second communication system exceeds the set threshold, the first information or the second information is sent; Otherwise, the first information or the second information is not sent. In this case, if the total number of bearer identifiers allocated by the session management function network element in the terminal device in the second communication system does not exceed the set threshold, the access and mobility management function network element will not be notified to update the priority information. Reduce signaling overhead.
  • the session management function network element may determine that the total number of bearer identifiers allocated by the terminal device in the second communication system exceeds the set threshold in any of the following manners.
  • the session management function network element may receive indication information from the access and mobility management function network element, where the indication information is used to indicate the bearer of the second communication system allocated by the access and mobility management function network element for the terminal device If the total number of identifiers exceeds the set threshold, the session management function network element determines, according to the indication information, that the total number of bearer identifiers allocated by the access and mobility management function network element to the terminal device in the second communication system exceeds the set threshold, for example, set The threshold is 9.
  • the indication information is the identifier of the bearer that is reclaimed (revoke).
  • the session management function network element sends the access and mobile
  • the mobility management function network element sends a request message, where the request message is used to request the access and mobility management function network element to allocate the identifier of the bearer of the second communication system to the third quality of service flow.
  • the access and mobility management function network element determines that the number of EPS bearers mapped for the QoS flow of the terminal device exceeds a set threshold (eg, 9), the EBI is recovered for the third QoS flow and sent to the session management function The network element sends the revoked EBI, so that the session management function network element can determine the total number of identities of the bearers of the second communication system allocated by the access and mobility management function network element for the terminal device according to the recovered EBI exceeds the set threshold.
  • the indication information is control plane signaling, for example, a bit of "1" indicates that the total number of identities of the bearers of the second communication system allocated by the access and mobility management function network element for the terminal device exceeds
  • the threshold is set. On the contrary, if the bit is "0", it means that the total number of identifiers of the bearers of the second communication system allocated by the access and mobility management function network element to the terminal device is less than or equal to the set threshold.
  • the session management function network element sends a query request to the access and mobility management function network element, where the query request is used to request to query the bearer of the second communication system allocated by the access and mobility management function network element for the terminal device. Whether the total number of identities exceeds the set threshold; the access and mobility management function network element will send a query response to the session management function network element, and the query response includes the query result of whether the total number of bearer identities exceeds the set threshold value.
  • the access and mobility management function network element always maintains the maximum ARP corresponding to each EBI. Therefore, when the access and mobility management function network element needs to recover the EBI, the By comparing the size of the ARP of the quality of service flow, the EBI corresponding to the smaller ARP can be filtered out, so that the EBI can be reasonably recovered.
  • This embodiment of the present application provides a second communication method.
  • FIG. 7 it is a flowchart of the method.
  • the method is applied to the network architecture shown in FIG. 1 as an example.
  • the method may be performed by a second communication device, which may be an access and mobility management function network element, or a communication capable of supporting the functions required by the access and mobility management function network element to implement the method.
  • a device such as a component included in the access and mobility management function network element, or a chip system in the access and mobility management function network element, and the like.
  • the communication method provided by the embodiment of the present application is described in detail by taking the method performed by the access and mobility management function network element as an example, and the access and mobility management function network element may refer to 5G AMF in the system.
  • FIG. 7 is a schematic flowchart of a communication method provided by an embodiment of the present application, and the method may include the following steps.
  • Step 701 During the process of creating the first QoS flow of the terminal device in the first communication system, the session management function network element determines that the first QoS flow needs to be moved to the first bearer of the second communication system.
  • Step 702 The session management function network element sends a first request message to the access and mobility management function network element, where the first request message is used to request to allocate an identifier of the first bearer of the second communication system for the first quality of service flow.
  • the SMF+PGW-C triggers an EPS bearer identification assignment request (Namf_Communication_EBIAssignment Request) service to the AMF, and requests the AMF to assign an EPS bearer identification.
  • EPS bearer identification assignment request (Namf_Communication_EBIAssignment Request) service to the AMF, and requests the AMF to assign an EPS bearer identification.
  • Step 703 the access and mobility management function network element assigns the terminal the identifier of the first bearer corresponding to the first quality of service flow in the second communication system, and establishes the priority of the first quality of service flow and the first quality of service The correspondence between the identifiers of the first bearers corresponding to the flows in the second communication system.
  • the access and mobility management function network element can store the correspondence between each quality of service flow of the terminal device and the corresponding ARP. If the N QoS flows of the terminal device all correspond to the first bearer, the access and mobility management function network element stores N priorities corresponding to the N QoS flows. Exemplarily, as shown in the three dedicated non-GBR QoS flows in Table 6, the dedicated non-GBR QoS flows all correspond to the first EBI, so according to the method provided in this embodiment, the corresponding data shown in Table 9 are stored on the AMF. relation.
  • Step 704 The access and mobility management function network element sends the identifier of the first bearer to the session management function network element.
  • the AMF responds to the service operation request of the SMF+PGW-C, triggers the EPS bearer identifier assignment response (Namf_Communication_EBIAssignment Response) service to the SMF+PGW-C, and sends the EPS bearer identifier to the SMF+PGW-C.
  • the EPS bearer identifier assignment response (Namf_Communication_EBIAssignment Response) service
  • the above-mentioned steps 701 to 704 are the process of allocating EBI for the access and mobility management function network elements.
  • the AMF saves the correspondence between the EBI and at least two ARPs.
  • the The method may also include the following EBI recovery and redistribution process:
  • Step 705 During the process of creating the second QoS flow of the terminal device in the first communication system, the session management function network element determines that the second QoS flow needs to be moved to the first bearer of the second communication system.
  • Step 706 The session management function network element sends a second request message to the mobility management function network element, where the request message is used to request allocation of the first bearer of the second communication system.
  • the SMF+PGW-C triggers an EPS bearer identification assignment request (Namf_Communication_EBIAssignment Request) service to the AMF, and requests the AMF to assign an EPS bearer identification.
  • EPS bearer identification assignment request (Namf_Communication_EBIAssignment Request) service to the AMF, and requests the AMF to assign an EPS bearer identification.
  • Step 707 When it is determined that the total number of bearer identifiers allocated by the access and mobility management function network element to the terminal device in the second communication system exceeds the set threshold, the access and mobility management function network element determines the second quality of service flow. Whether the priority is greater than the maximum priority among the N QoS flows, if it is greater than, execute step 708a to step 709, otherwise execute step 708b.
  • Step 708a the access and mobility management function network element reclaims the first bearer, assigns the identifier of the first bearer to the second quality of service flow, and establishes a relationship between the priority of the second quality of service flow and the identifier of the first bearer. Correspondence.
  • the AMF determines that the number of EPS bearers mapped for the quality of service flow of the terminal device exceeds a set threshold (for example, 9), the AMF needs to reclaim the EBI. Assuming that the ARP of the second quality of service flow is 5, then the ARP of the second quality of service flow is greater than the maximum ARP in Table 9 (ARP is 4), the AMF reclaims the first EBI and assigns it to the second quality of service flow, and in addition , the AMF establishes the correspondence between the first EBI and the ARP as shown in Table 10.
  • a set threshold for example, 9
  • Step 708b the access and mobility management function network element does not respond.
  • the AMF determines that the number of EPS bearers mapped for the quality of service flow of the terminal device exceeds a set threshold (for example, 9), the AMF needs to reclaim the EBI. Assuming that the ARP of the second quality of service flow is 3, then the ARP of the second quality of service flow is not greater than the maximum ARP in Table 9 (ARP is 4), so the AMF refuses to allocate EBI for the second quality of service flow, that is, does not assign an EBI to the SMF Send a response message.
  • a set threshold for example, 9
  • the above method further includes the following QoS flow release process:
  • Step 710 The session management function network element sends a release request message to the access and mobility management function network element, where the release request message is used to request to release the first bearer of the second communication system.
  • Step 711 After receiving the release request, the access and mobility management function network element releases the corresponding relationship between the priority of the first quality of service flow and the identifier of the first bearer.
  • the ARP corresponding to each EBI is always maintained on the access and mobility management function network element. Therefore, when the access and mobility management function network element needs to recover the EBI, By comparing the ARP sizes between QoS flows, the EBI corresponding to the smaller ARP can be screened out, so that the EBI can be reasonably recovered.
  • FIG. 8 is a flowchart of the method.
  • the method is applied to the network architecture shown in FIG. 1 as an example. The method can still be performed by the first communication device.
  • FIG. 8 is a schematic flowchart of a third communication method according to an embodiment of the present application, and the method may include the following steps.
  • Step 801 During the process of creating the first QoS flow of the terminal device in the first communication system, the session management function network element determines that the first QoS flow needs to be moved to the first bearer of the second communication system.
  • Step 802 the session management function network element sends a first request message to the access and mobility management function network element, where the first request message is used for requesting to allocate the first bearer of the second communication system for the first quality of service flow.
  • Step 803 The access and mobility management function network element assigns the terminal an identifier of the first bearer corresponding to the first quality of service flow in the second communication system, and sends the first bearer identifier to the session management function network element.
  • the AMF responds to the service operation request of the SMF+PGW-C, triggers the EPS bearer identifier assignment response (Namf_Communication_EBIAssignment Response) service to the SMF+PGW-C, and sends the EPS bearer identifier to the SMF+PGW-C.
  • the EPS bearer identifier assignment response (Namf_Communication_EBIAssignment Response) service
  • Step 804 The session management function network element receives the identifier of the first bearer, and establishes a correspondence between the priority of the first QoS flow and the identifier of the first bearer corresponding to the first QoS flow in the second communication system.
  • the network element of the session management function can store the correspondence between each quality of service flow of the terminal device and the corresponding ARP. If the N QoS flows of the terminal device all correspond to the first bearer, then N priorities corresponding to the N QoS flows are stored on the network element of the session management function. Exemplarily, as in the three dedicated non-GBR QoS flows in Table 6, the dedicated non-GBR QoS flows all correspond to the first EBI, so according to the method provided in this embodiment, the SMF stores the corresponding data shown in Table 9. relation.
  • the above steps 801 to 804 are the process of establishing the corresponding relationship.
  • the corresponding relationship between the EBI and at least two ARPs is stored on the SMF.
  • the method may also include the following EBI recovery and reprocessing Allocation process:
  • Step 805 During the process of creating the second QoS flow of the terminal device in the first communication system, the session management function network element determines that the second QoS flow needs to be moved to the first bearer of the second communication system.
  • Step 806 The session management function network element sends a second request message to the access and mobility management function network element, where the first request message is used for requesting to allocate the identifier of the bearer of the second communication system for the second quality of service flow.
  • Step 807 the access and mobility management function network element determines whether the total number of bearer identifiers allocated to the terminal device in the second communication system exceeds the set threshold, if so, execute steps 808 to 811b, if not, execute steps 812.
  • Step 808 The access and mobility management function network element sends a third request message to the session management function network element, where the third request message includes the identifier of the first bearer to be reclaimed, and the priority corresponding to the identifier of the first bearer. class.
  • Step 809 After receiving the third request message, the session management function network element determines whether the priority corresponding to the identifier of the first bearer is less than or equal to the maximum priority of the priorities of the N QoS flows. If yes, go to step 810a, otherwise go to step 810b.
  • Step 810a the session management function network element sends a negative response message to the access and mobility management function network element, where the negative response message includes indication information of refusing to reclaim the bearer's identifier.
  • the response message further includes the maximum priority of the priorities of the N QoS flows, so as to facilitate access to the priority corresponding to the identification of the first bearer by the mobility management function network element Recorded as the maximum priority.
  • Step 810b the session management function network element sends a positive response message to the access and mobility management function network element, where the positive response message includes indication information of agreeing to reclaim the bearer's identifier.
  • Step 811a when the access and mobility management function network element receives the positive response message, it allocates the bearer's identifier to the session management function network element.
  • Step 811b when the access and mobility management function network element receives the negative response message, it does not reclaim the bearer's identifier from the session management function network element, that is, does not respond.
  • Step 812 The access and mobility management function network element allocates the bearer identifier to the second QoS flow, and sends the assigned bearer identifier to the session management function network element.
  • the above method further includes the following QoS flow release process:
  • Step 813 During the release process of the first QoS flow in the first communication system of the terminal device, the session management function network element releases the corresponding relationship between the priority of the first QoS flow and the identifier of the first bearer.
  • the three dedicated non-GBR QoS flows all correspond to the first EBI.
  • the SMF stores a table. Correspondence shown in 11.
  • the session management function network element can always store the latest correspondence between the EBI and each ARP, thereby facilitating the session management function network element to determine whether the EBI can be recovered.
  • recovery mentioned in the above embodiments can also be expressed as revocation, cancellation, release, etc., which is not limited in this application.
  • the corresponding relationship establishment process shown in the above steps 801 to 804, the EBI recovery and reallocation process shown in the steps 805 to 812, and the release process of the quality of service flow shown in the step 813 can be decoupled , which can be executed separately.
  • the session management function network element since the session management function network element maintains the ARP corresponding to each EBI, when the access and mobility management function network element is not sure whether the EBI can be recovered, the access and mobility management function network element A request will be sent to the session management function network element, and the session management function network element will determine whether the EBI can eventually be recovered by comparing the ARP size between the quality of service flows, and the access and mobility management function network element will be based on the session management function The network element's instruction reasonably recycles the EBI.
  • Embodiments of the present application provide a fourth communication method. Please refer to FIG. 9 , which is a flowchart of the method. In the following introduction process, the method is applied to the network architecture shown in FIG. 1 as an example. The method can still be performed by the first communication device.
  • FIG. 9 is a schematic flowchart of a fourth communication method provided by an embodiment of the present application, and the method may include the following steps.
  • Step 901 During the process of creating the first QoS flow of the terminal device in the first communication system, the session management function network element determines that the first QoS flow needs to be moved to the first bearer of the second communication system.
  • the UE or the PCF triggers the establishment of a non-GBR QoS flow by the SMF+PGW-C in the PDU Session Modification process, and the SMF+PGW-C determines the service identifier (for example, Application ID) of the non-GBR QoS flow to be created and ARP, and determine that the non-GBR QoS flow needs to request an EPS Bearer ID from the access and mobility management function network element.
  • the service identifier for example, Application ID
  • Step 902 the session management function network element sends a request message to the network data analysis function (network data analytics function, NWDAF) network element, where the request message includes the service identifier of the first quality of service flow.
  • NWDAF network data analytics function
  • the request message is used to request the service identifier of the same service as the first quality of service flow and/or the priority corresponding to each service identifier.
  • the request message may further include the ARP of the first quality of service flow, the identifier of the terminal device, and the like.
  • the SMF triggers the Nnwdaf_AnalyticsInfo_Request service operation to the NWDAF, and requests the NWDAF for the ARP of the same service as the Application ID of the non-GBR QoS flow to be created.
  • the application ID, ARP information, terminal identifier (SUPI), etc. of the non-GBR QoS flow to be created can be carried in the service operation.
  • Step 903 The session management function network element receives a response message from the NWDAF, where the response message includes M service identifiers of the same service of the first QoS flow and/or the priority corresponding to each of the M service identifiers.
  • the SMF+PGW-C receives the Nnwdaf_AnalyticsInfo_Request response service operation from the NWDAF, and the service operation includes a list of Application IDs similar to the Application ID of the non-GBR QoS flow to be created and the ARP information of each service.
  • NWDAF analyzes historical data and finds that SMF+PGW-C always aggregates 5G side non-GBR QoS flows corresponding to some VoIP services (such as WeChat voice services, WeChat video services, etc.) to the same EPS bearer , then the NWDAF can send the ARP or service identifier of this type of VoIP service to the SMF+PGW-C.
  • Step 904 the session management function network element is based on the M service identifiers and the service identifier of the first quality of service flow, and/or the session management function network element is based on the priority and the first service identifier corresponding to each of the M service identifiers.
  • the priorities of N-1 quality of service flows related to the service identifier of the first quality of service flow are determined.
  • the SMF+PGW-C selects ARPs of N-1 QoS flows that may be aggregated with the first QoS flow from ARPs corresponding to one or more services according to the data analysis result fed back by the NWDAF.
  • Step 905 the session management function network element determines the maximum priority from the priority of the first QoS flow and the priorities of N-1 QoS flows.
  • the SMF+PGW-C takes the maximum value among the ARPs as the ARP of the non-GBR QoS flow to be created.
  • Step 906 the session management function network element sends a second request message to the access and mobility management function network element, the second request message is used to request to allocate the bearer of the second communication system for the first quality of service flow, and includes the maximum priority class.
  • the SMF+PGW-C requests the EPS bearer identity from the AMF through the Namf_Communication_EBIAssignment service operation.
  • Step 907 The access and mobility management function network element sends a second response message to the session management function network element, where the second response message includes the identifier of the bearer.
  • Step 908 The access and mobility management function network element establishes a correspondence between the bearer's identifier and the maximum priority.
  • the AMF does not need to update the QoS flow even if a new QoS flow is created subsequently.
  • the ARP corresponding to the EBI, and then AMF can directly determine whether the EBI can be recycled by comparing the ARP size between the quality of service flows according to the existing recycling mechanism, without negotiating with the SMF+PGW-C.
  • step numbers of the flowcharts described in the embodiments are only an example of the execution process, and do not constitute a restriction on the sequence of execution of the steps. There is no strict order of execution between steps in the embodiments that do not have a timing dependency on each other.
  • the terminal may include a hardware structure and/or a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether one of the above functions is performed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.
  • the embodiments of the present application further provide a first communication apparatus 1000, where the first communication apparatus 1000 is configured to implement the function of the session management function network element in the foregoing method.
  • the first communication apparatus 1000 may be a session management function network element, or may be a device in a session management function network element.
  • the apparatus may be a system-on-a-chip.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the first communication apparatus 1000 includes a determining unit 1001 and a sending unit 1002 .
  • the determining unit 1001 is configured to, in the process of creating the first quality of service flow of the terminal device in the first communication system, determine that the first quality of service flow needs to be moved to the second communication system the first bearer; determining that the priority of the first quality of service flow is the largest among the priorities of the N quality of service flows corresponding to the first bearer;
  • a sending unit 1002 is configured to send first information of the first quality of service flow to an access and mobility management function network element of the first communication system, where the first information includes the information of the first quality of service flow.
  • the first information is used for the access and mobility management function network element to record the priority corresponding to the identifier of the first bearer as the priority of the first quality of service flow, the N
  • the quality of service flow includes the first quality of service flow; N is a positive integer greater than or equal to 2.
  • the quality of service flow may be a non-guaranteed bit rate quality of service flow.
  • the first information further includes: an identifier of the first bearer.
  • the priority of the first quality of service flow may be the ARP of the first quality of service flow.
  • the determining unit 1001 is further configured to determine that the first quality of service flow needs to be released;
  • the sending unit 1002 is further configured to send second information to the access and mobility management function network element, where the second information includes the priority of the second quality of service flow, and the second information is used for the
  • the access and mobility management function network element records the priority corresponding to the identifier of the first bearer as the priority of the second quality of service flow, and the priority of the second quality of service flow is the N services
  • the maximum priority of the priorities of N-1 QoS flows other than the first QoS flow among the quality flows.
  • the second information further includes an identification of the first bearer.
  • the apparatus further includes a receiving unit 1003;
  • the receiving unit 1003 is configured to receive indication information from the access and mobility management function network element, where the indication information is used to indicate that the access and mobility management function network element allocates the terminal device.
  • the total number of identifiers carried by the second communication system exceeds the set threshold;
  • the indication information is the identifier of the bearer being recycled.
  • the sending unit 1002 is further configured to send a request message to the access and mobility management function network element when creating a third quality of service flow in the first communication system of the terminal device , the request message is used to request the access and mobility management function network element to allocate the identifier of the bearer of the second communication system to the third QoS flow;
  • the receiving unit 1003 is specifically configured to:
  • a response message is received from the access and mobility management function network element, where the response message includes the indication information.
  • the determining unit 1001 determines that the first quality of service flow needs to be moved to the first bearer of the second communication system, it is specifically configured to:
  • operator policy At least one of a policy and a charging control rule corresponding to the flow determines that the first quality of service flow needs to be moved to the first bearer of the second communication system.
  • the receiving unit 1003 is configured to receive a request message from the access and mobility management function network element, where the request message includes the identifier of the bearer to be reclaimed and the corresponding identifier of the bearer. priority;
  • a determining unit 1001 configured to determine the maximum priority of the priority corresponding to the identifier of the bearer that is less than or equal to the priority of N QoS flows, wherein the N QoS flows all correspond to the identifier of the bearer, N is a positive integer greater than or equal to 2;
  • the sending unit 1002 is configured to send a response message to the access and mobility management function network element, where the response message includes indication information, where the indication information is used to refuse to reclaim the bearer's identifier.
  • the response message further includes a maximum priority of priorities of the N QoS flows, the maximum priority being used by the access and mobility management function network element to assign the first bearer The priority corresponding to the identification is recorded as the maximum priority.
  • the determining unit 1001 is configured to determine that the first quality of service flow needs to be moved to the second communication system during the process of creating the first quality of service flow of the terminal device in the first communication system bearer; determine the priority of N-1 QoS flows of the terminal device related to the service identifier of the first QoS flow according to the service identifier of the first QoS flow, where N is greater than or equal to a positive integer of 2; the maximum priority is determined from the priority of the first QoS flow and the priorities of the N-1 QoS flows;
  • the sending unit 1002 is configured to send a request message to an access and mobility management function network element of the second communication system, where the request message is used to request to allocate a bearer of the second communication system for the first quality of service flow.
  • the request message includes the maximum priority.
  • the quality of service flow is a non-guaranteed bit rate quality of service flow.
  • the priority is assigning a hold-priority ARP.
  • the sending unit 1002 is further configured to send a request message to the NWDAF, where the request message includes the service identifier of the first quality of service flow;
  • the apparatus further includes a receiving unit 1003;
  • the receiving unit 1003 is further configured to receive a response message from the NWDAF, where the response message includes the M service identifiers and/or the priority corresponding to each service identifier in the M service identifiers, where M is greater than or equal to N-1, M is a positive integer;
  • the determining unit 1001 determines, according to the service identifier of the first QoS stream, the priorities of the N-1 QoS streams of the terminal device related to the service identifier of the first QoS stream, the specific use is: At:
  • the M service identifiers and the service identifier of the first quality of service flow determine the The priority of N-1 quality of service flows of the terminal device related to the service identifier of the first quality of service flow.
  • the first communication apparatus 1000 includes a receiving unit 1001 and a establishing unit 1002 .
  • the receiving unit 1001 is configured to receive the priority of the first quality of service flow in the process of creating the first quality of service flow of the terminal device in the first communication system;
  • the first communication device further includes a establishing unit 1002, configured to establish a correspondence between the priority of the first quality of service flow and the identifier of the bearer corresponding to the first quality of service flow in the second communication system;
  • the identifier of the bearer corresponds to N quality of service flows, N is a positive integer greater than or equal to 2, and the N quality of service flows include the first quality of service flow.
  • the receiving unit 1001 is further configured to receive the priority of the second quality of service flow
  • the first communication apparatus further includes a determining unit 1003; the determining unit 1003 is configured to, when it is determined that the total number of bearer identifiers allocated by the access and mobility management function network element to the terminal device in the second communication system exceeds a set value When the threshold value, according to the priority of the second QoS flow and the maximum priority among the N QoS flows, it is determined whether to establish a corresponding relationship between the priority of the second QoS flow and the identifier of the bearer .
  • the determining unit 1003 is further configured to determine that the first quality of service flow needs to be released;
  • the device further comprises a releasing unit 1004;
  • the releasing unit 1004 is configured to release the correspondence between the priority of the first quality of service flow and the identifier of the bearer corresponding to the first quality of service flow in the second communication system.
  • the embodiment of the present application further provides a second communication apparatus 1100, where the second communication apparatus 1100 is configured to implement the functions of the access and mobility management function network element in the above method.
  • the second communication device 1100 may be an access and mobility management function network element, or may be a device in an access and mobility management function network element.
  • the apparatus may be a system-on-a-chip.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the second communication apparatus 1100 includes a receiving unit 1101 , a establishing unit 1102 and a determining unit 1103 .
  • a receiving unit 1101 configured to receive the priority of the first quality of service flow in the process of creating the first quality of service flow of the terminal device in the first communication system;
  • establishing unit 1102 configured to establish a correspondence between the priority of the first quality of service flow and the identifier of the bearer corresponding to the first quality of service flow in the second communication system;
  • the identifier of the bearer corresponds to N quality of service flows, N is a positive integer greater than or equal to 2, and the N quality of service flows include the first quality of service flow.
  • the receiving unit 1101 is further configured to receive the priority of the second quality of service flow
  • the apparatus further includes a determining unit 1103;
  • the determining unit 1103 is configured to, when it is determined that the total number of bearer identifiers allocated by the access and mobility management function network element to the terminal device in the second communication system exceeds a set threshold, according to the second quality of service
  • the priority of the flow and the maximum priority among the N QoS flows determine whether to establish a corresponding relationship between the priority of the second QoS flow and the identifier of the bearer.
  • the determining unit 1103 is further configured to determine that the first quality of service flow needs to be released;
  • the apparatus further includes a releasing unit 1104; the releasing unit 1104 is configured to release the priority of the first quality of service flow from the corresponding priority of the first quality of service flow in the second communication system The corresponding relationship of the bearer's identity.
  • the division of modules in the embodiments of the present application is schematic, and is only a logical function division. In actual implementation, there may be other division methods.
  • the functional modules in the various embodiments of the present application may be integrated into one processing unit. In the device, it can also exist physically alone, or two or more modules can be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.
  • the first communication apparatus 1000 and the second communication apparatus 1100 include at least one processor 1210 and a memory 1220 .
  • the computer program is stored in the memory 1220 .
  • Memory 1220 and processor 1210 are coupled.
  • the coupling in the embodiments of the present application is the spaced coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information interaction between the devices, units or modules.
  • the memory 1220 may also be located outside the first communication device 1000 and the second communication device 1100 .
  • the processor 1210 may cooperate with the memory 1220.
  • the processor 1210 may invoke computer programs stored in the memory 1220 . At least one of the at least one memory may be included in the processor.
  • the first communication apparatus 1000 and the second communication apparatus 1100 may further include a communication interface 1230 for communicating with other devices through a transmission medium, so as to be used in the first communication apparatus 1000 and the second communication apparatus 1100
  • the device can communicate with other devices.
  • the communication interface 1230 may be a transceiver, circuit, bus, module, or other type of communication interface, and the other device may be other terminal.
  • the processor 1210 uses the communication interface 1230 to send and receive information, and is used to implement the methods in the above embodiments.
  • the communication interface 1230 is used for receiving resource indication information.
  • the communication interface 1230 is used to transmit data.
  • the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which can implement or
  • a general purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or may also be a volatile memory (volatile memory), for example Random-access memory (RAM).
  • Memory is, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
  • the memory in this embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, for storing computer programs and/or data.
  • the methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented in software, it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer When the computer program is loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment, or other programmable apparatus.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server or data center by wire (eg coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.).
  • the computer-readable storage medium can be any medium that can be accessed by a computer, or a data storage device such as a server, data center, etc. that includes one or more medium integrations.
  • the medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, an SSD), or the like.

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Abstract

本申请公开了一种通信方法及装置，该方法包括：在创建终端设备在第一通信系统中的第一服务质量流的过程中，会话管理功能网元确定第一服务质量流需要移动到第二通信系统的第一承载；以及确定第一服务质量流的优先级在第一承载对应的N个服务质量流的优先级中最大；会话管理功能网元向第一通信系统的接入与移动性管理功能网元发送第一服务质量流的第一信息，第一信息包括第一服务质量流的优先级，接入与移动性管理功能网元将第一承载的标识对应的优先级记录为第一服务质量流的优先级，N个服务质量流包括第一服务质量流；N为大于或等于2的正整数。

Description

一种通信方法及装置 技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
目前的第三代合作伙伴计划(the 3rd generation partner project，3GPP)协议支持第四代(4th generation，4G)移动通信技术系统(也就是演进型分组系统(evolved packet system，EPS))与第五代(5th generation，5G)移动通信技术系统之间的互操作。由于EPS通过EPS承载进行服务质量(quality of service，QoS)控制，5G系统通过QoS流进行QoS控制，EPS与5G系统之间的互操作需要进行EPS承载与QoS流之间的映射。
然而，通常情况下，EPS能够为一个终端设备创建的EPS承载的数量小于5G系统能够为该终端设备创建的QoS流的数量。虽然，多个QoS流可以映射到同一个EPS承载上，但是当5G系统为该终端设备的QoS流映射的EPS承载的数量超过最大数量(例如9)时，可能存在EPS承载标识(EPS bearer identity，EBI)被抢占或者被不合理回收的问题。
发明内容
本申请提供一种通信方法及装置，用于解决EPS承载标识被抢占或者被不合理回收的问题。
第一方面，本申请实施例提供一种通信方法，该方法可由第一通信装置执行，该第一通信装置可以是会话管理功能网元，或为能够支持会话管理功能网元实现该方法所需的功能的通信装置，例如会话管理功能网元包括的部件，或者会话管理功能网元中的芯片系统等，示例性地，该方法由会话管理功能网元执行。该方法包括：在创建终端设备在第一通信系统中的第一服务质量流的过程中，确定第一服务质量流需要移动到第二通信系统的第一承载，或者说确定第一服务质量流需要切换或重定向到第二通信系统的第一承载；确定第一服务质量流的优先级在第一承载对应的N个服务质量流的优先级中最大时，则向第一通信系统的接入与移动性管理功能网元发送第一服务质量流的第一信息，第一信息包括第一服务质量流的优先级。接入与移动性管理功能网元收到第一信息后，将第一承载的标识对应的优先级记录(或者是设置或更新)为第一服务质量流的优先级。其中，N个服务质量流包括第一服务质量流；N为大于或等于2的正整数。
另外，当会话管理功能网元确定第一服务质量流的优先级在第一承载对应的N个服务质量流的优先级中不是最大时，会话管理功能网元可以不向接入与移动性管理功能网元发送信息，即不通知接入与移动性管理功能网元更新优先级。这样，一定程度上可以节省信令开销。
在本申请实施例中，N个服务质量流是所述终端设备在所述第一通信系统中的服务质量流。
本申请实施例中，按照上述优先级的更新方式，会话管理功能网元向接入与移动性管理功能网元发送承载对应的最大ARP，从而接入与移动性管理功能网元上始终维护着EBI对应最大ARP。这样，在接入与移动性管理功能网元需要回收EBI时，通过比较服务质量 流的ARP的大小，就能够筛选出较小ARP对应的EBI，从而合理回收EBI。
结合第一方面，在第一方面的一种可能的设计中，上述服务质量流可以为非保证比特速率服务质量流，第一服务质量流的优先级可以为第一服务质量流的分配保持优先级(allocation retention priority，ARP)。
本申请实施例中，针对至少两个非保证比特速率服务质量流对应同一个承载的场景下，按照上述方法及时更新承载对应的ARP，可以有效地避免EBI被抢占或者被不合理回收的问题。
结合第一方面，在第一方面的一种可能的设计中，第一信息还包括：所述第一承载的标识。也就是说，会话管理功能网元向接入与移动性管理功能网元发送第一服务质量流的优先级，以及与之对应的第一承载的标识，以便于接入与移动性管理功能网元根据第一承载的标识查找对应的优先级，并更新对应的优先级为第一服务质量流的优先级。
结合第一方面，在第一方面的一种可能的设计中，上述方法还包括：
确定需要释放第一服务质量流时，向接入与移动性管理功能网元发送第二信息，第二信息包括第二服务质量流的优先级。接入与移动性管理功能网元接收第二信息后，将第一承载的标识对应的优先级记录为第二服务质量流的优先级，第二服务质量流的优先级为N个服务质量流中除了第一服务质量流之外的N-1个服务质量流的优先级的最大优先级。
本申请实施例中，按照上述优先级的更新方式，会话管理功能网元及时通知接入与移动性管理功能网元更新承载对应的最大ARP，从而接入与移动性管理功能网元上始终维护着EBI对应最大ARP。这样，在接入与移动性管理功能网元需要回收EBI时，通过比较服务质量流的ARP的大小，就能够筛选出较小ARP对应的EBI，从而合理回收EBI。
结合第一方面，在第一方面的一种可能的设计中，第二信息还包括第一承载的标识。也就是说，会话管理功能网元向接入与移动性管理功能网元发送第二服务质量流的优先级，以及与之对应的第一承载的标识，以便于接入与移动性管理功能网元根据第一承载的标识查找对应的优先级，并更新对应的优先级为第二服务质量流的优先级。
结合第一方面，在第一方面的一种可能的设计中，会话管理功能网元向第一通信系统的接入与移动性管理功能网元发送第一服务质量流的第一信息之前，该方法还包括：
接收来自接入与移动性管理功能网元的指示信息，该指示信息用于指示接入与移动性管理功能网元为终端设备分配的第二通信系统的承载的标识总数超过设定阈值；然后根据指示信息，确定接入与移动性管理功能网元为终端设备在第二通信系统中分配的承载标识总数是否超过设定阈值。
一方面，当会话管理功能网元确定为所述终端设备在第二通信系统中分配的承载标识总数不超过设定阈值时，不向接入与移动性管理功能网元发送通知消息。因这时，接入与移动性管理功能网元并不会回收EBI，即EBI仍足够分配给终端设备的服务质量流，所以接入与移动性管理功能网元即使不及时更新ARP，也不会影响EBI的分配，这样一定程度上节省信令开销。
另一方面，当会话管理功能网元确定为所述终端设备在第二通信系统中分配的承载标识总数超过设定阈值(例如大于或等于9)时，才向接入与移动性管理功能网元发送第一信息。按照上述方法通知接入与移动性管理功能网元更新ARP，可以保证在接入与移动性管理功能网元的EBI被全部分配给终端设备的服务质量流之后，接入与移动性管理功能网元上始终维护着EBI对应最大ARP，这样，在接入与移动性管理功能网元需要回收EBI 时，通过比较服务质量流的ARP的大小，就能够筛选出较小ARP对应的EBI，从而合理回收EBI。
结合第一方面，在第一方面的一种可能的设计中，会话管理功能网元可以按照如下任意一种方式确定该终端设备在第二通信系统中分配的承载标识总数超过设定阈值：
一种可能的情况下，该指示信息为被回收(revoke)的承载的标识。示例性地，在创建终端设备的第一服务质量流之前，若会话管理功能网元需要创建终端设备在第一通信系统中的第三服务质量流，则会话管理功能网元向接入与移动性管理功能网元发送请求消息，该请求消息用于请求接入与移动性管理功能网元为第三服务质量流分配第二通信系统的承载的标识。由于接入与移动性管理功能网元确定为该终端设备的服务质量流映射的EPS承载的数量超过设定阈值(例如9)，因此为该第三服务质量流回收EBI，并向会话管理功能网元发送该被回收(revoke)的EBI，从而会话管理功能网元可以根据该被回收的EBI，确定接入与移动性管理功能网元为终端设备分配的第二通信系统的承载的标识总数超过设定阈值。相较于下面两种可能的情况，该方式可以节省信令。
在另一种可能的情况下，该指示信息为控制面信令，例如比特位为“1”代表接入与移动性管理功能网元为终端设备分配的第二通信系统的承载的标识总数超过设定阈值，反之，比特位为“0”代表接入与移动性管理功能网元为终端设备分配的第二通信系统的承载的标识总数小于或等于设定阈值。
在其它可能的情况下，会话管理功能网元向接入与移动性管理功能网元发送查询请求，该查询请求用于请求查询接入与移动性管理功能网元为终端设备分配的第二通信系统的承载的标识总数是否超过设定阈值；接入与移动性管理功能网元会向会话管理功能网元发送查询响应，该查询响应包括承载的标识总数是否超过设定阈值的查询结果。
本申请实施例中，按照上述方法可以准确确定该终端设备在第二通信系统中分配的承载标识总数是否超过设定阈值，按照上述方法通知接入与移动性管理功能网元更新ARP，可以保证在接入与移动性管理功能网元的EBI被全部分配给终端设备的服务质量流之后，接入与移动性管理功能网元上始终维护着EBI对应最大ARP，这样，在接入与移动性管理功能网元需要回收EBI时，通过比较服务质量流的ARP的大小，就能够筛选出较小ARP对应的EBI，从而合理回收EBI。
在一种可能的设计中，会话管理功能网元根据接入与移动性管理功能网元与第二通信系统的移动性管理实体之间存在接口、运营商策略、单网络切片选择辅助信息(single network slice selection assistance information，S-NSSAI)、数据网络名称(data network name，DNN)以及第一服务质量流对应的策略与计费控制规则中的至少一个，确定第一服务质量流需要移动到第二通信系统的第一承载。示例性地，SMF+PGW-C根据AMF与MME之间存在N26接口、第一non-GBR QoS流所在会话的DNN或S-NSSAI等支持5G系统与EPS之间Interworking、第一non-GBR QoS流对应的QoS参数、SMF本地运营商策略等条件中的一个或者组合，确定该第一non-GBR QoS流需要从5G系统切换到EPS，并且该第一non-GBR QoS流映射到当前已经分配的EPS Bearer ID(如EPS Bearer X)对应的EPS Bearer中。
本申请实施例中，上述方法有助于判断终端设备是否从5G通信系统中移动(包括切换或者重定向)至4G通信系统，从而及时更新该场景下的EBI对应的ARP。
第二方面，本申请实施例还提供一种通信方法，该方法可应用第一通信装置，该方法 包括：
在释放终端设备的第一通信系统中的第一服务质量流的过程中，确定第一服务质量流需要移动到第二通信系统的第一承载，或者说确定第一服务质量流需要切换或重定向到第二通信系统的第一承载；向所述接入与移动性管理功能网元发送第二信息，所述第二信息包括第二服务质量流的优先级。接入与移动性管理功能网元接收第二信息后，将所述第一承载的标识对应的优先级记录为所述第二服务质量流的优先级，所述第二服务质量流的优先级为所述N个服务质量流中除了所述第一服务质量流之外的N-1个服务质量流的优先级的最大优先级。
本申请实施例中，N个服务质量流是所述终端设备在所述第一通信系统中的服务质量流。按照上述优先级的更新方式，会话管理功能网元及时通知接入与移动性管理功能网元更新承载对应的最大ARP，从而接入与移动性管理功能网元上始终维护着EBI对应最大ARP。这样，在接入与移动性管理功能网元需要回收EBI时，通过比较服务质量流的ARP的大小，就能够筛选出较小ARP对应的EBI，从而合理回收EBI。
第三方面，本申请实施例提供一种通信方法，可以应用于第二通信装置，该第二通信装置可以是接入与移动性管理功能网元，或为能够支持接入与移动性管理功能网元实现该方法所需的功能的通信装置，例如接入与移动性管理功能网元包括的部件，或者接入与移动性管理功能网元中的芯片系统等，示例性地，该方法可以由接入与移动性管理功能网元执行，该方法包括：
在创建终端设备在第一通信系统中的第一服务质量流的过程中，接收第一服务质量流的优先级；建立第一服务质量流的优先级与第一服务质量流在第二通信系统中对应的承载的标识的对应关系；其中，承载的标识对应有N个服务质量流，N为大于或等于2的正整数，N个服务质量流包括第一服务质量流。
本申请实施例中，N个服务质量流是所述终端设备在所述第一通信系统中的服务质量流。接入与移动性管理功能网元按照上述方式可以保存对应同一EBI的各个服务质量流的ARP，例如维护同一EBI对应的ARP列表，这样，在接入与移动性管理功能网元需要回收EBI时，通过比较服务质量流的ARP的大小，就能够筛选出较小ARP对应的EBI，从而合理回收EBI。
结合第三方面，在第三方面的一种可能的设计中，该方法还包括：
接收所述第二服务质量流的优先级；当确定接入与移动性管理功能网元为终端设备在第二通信系统中分配的承载标识总数超过设定阈值时，根据第二服务质量流的优先级以及N个服务质量流中的最大优先级，确定是否建立第二服务质量流的优先级与承载的标识的对应关系。或者说，当接入与移动性管理功能网元在第二服务质量流的优先级大于N个服务质量流中的最大优先级时，才确定回收该EBI，并将该EBI再分配给第二服务质量流，这时，才建立第二服务质量流与该EBI的对应关系；当接入与移动性管理功能网元在第二服务质量流的优先级不大于N个服务质量流中的最大优先级时，不回收该EBI，也不会为该第二服务质量流分配EBI，因此也不会建立第二服务质量流与该EBI的对应关系。可见，接入与移动性管理功能网元需要回收EBI时，通过比较服务质量流的ARP的大小，就能够筛选出较小ARP对应的EBI，从而合理回收EBI。
结合第三方面，在第三方面的一种可能的设计中，该方法还包括：确定需要释放所述 第一服务质量流时，解除第一服务质量流的优先级与第一服务质量流在第二通信系统中对应的承载的标识的对应关系。
按照上述优先级的更新方式，接入与移动性管理功能网元上始终维护着最新状态下的EBI对应的ARP。这样，在接入与移动性管理功能网元需要回收EBI时，通过比较服务质量流的ARP的大小，就能够筛选出较小ARP对应的EBI，从而合理回收EBI。
第四方面，本申请实施例提供一种通信方法，该方法可应用于上述第一通信装置，该方法包括：
在创建终端设备在第一通信系统中的第一服务质量流的过程中，接收第一服务质量流的优先级；建立第一服务质量流的优先级与第一服务质量流在第二通信系统中对应的承载的标识的对应关系；其中，承载的标识对应有N个服务质量流，N为大于或等于2的正整数，N个服务质量流包括第一服务质量流。
本申请实施例中，N个服务质量流是所述终端设备在所述第一通信系统中的服务质量流。会话管理功能网元按照上述方式可以保存对应同一EBI的各个服务质量流的ARP，例如维护同一EBI对应的ARP列表，这样，在接入与移动性管理功能网元需要回收EBI时，会话管理功能网元通过比较服务质量流的ARP的大小，就能够确定是否可以回收该EBI，从而接入与移动性管理功能网元根据会话管理功能网元的指示合理回收EBI。
结合第四方面，在第四方面的一种可能的设计中，该方法还包括：确定需要释放第一服务质量流时，解除第一服务质量流的优先级与第一服务质量流在第二通信系统中对应的承载的标识的对应关系。按照上述优先级的更新方式，会话管理功能网元上始终维护着最新状态下的EBI对应的ARP。
结合第四方面，在第四方面的一种可能的设计中，该方法还包括：接收来自接入与移动性管理功能网元的请求消息，该请求消息包括被请求回收的承载的标识以及第一优先级，第一优先级为要抢占标识的优先级；确定第一优先级小于N个服务质量流的优先级的最大优先级，其中，N个服务质量流均对应于承载的标识，N为大于或等于2的正整数；
向接入与移动性管理功能网元发送响应消息，响应消息包括指示信息，指示信息用于拒绝回收所述承载的标识。
本申请实施例中，在接入与移动性管理功能网元需要回收EBI时，会话管理功能网元通过比较服务质量流的ARP的大小，就能够确定是否可以回收该EBI，从而接入与移动性管理功能网元根据会话管理功能网元的指示合理回收EBI。
结合第四方面，在第四方面的一种可能的设计中，该响应消息还可以包括N个服务质量流的优先级的最大优先级，最大优先级用于接入与移动性管理功能网元将第一承载的标识对应的优先级记录为最大优先级。以便于在接入与移动性管理功能网元需要回收EBI时，通过比较服务质量流的ARP的大小，就能够筛选出较小ARP对应的EBI，从而合理回收EBI。
第五方面，本申请实施例提供一种通信方法，该方法可应用于上述第一通信装置，该方法包括：
接收来自接入与移动性管理功能网元的请求消息，所述请求消息包括被请求回收的承载的标识以及所述承载的标识对应的优先级；
一方面，确定承载的标识对应的优先级小于或等于N个服务质量流的优先级的最大优先级，向所述接入与移动性管理功能网元发送否定响应消息，该否定响应消息包括指示信息，该指示信息用于拒绝回收所述承载的标识。
或者，另一方面，确定承载的标识对应的优先级小于或等于N个服务质量流的优先级的最大优先级，向接入与移动性管理功能网元发送肯定响应消息，该肯定响应消息包括指示信息，该指示信息用于同意回收承载的标识。
其中，N个服务质量流均对应于承载的标识，N为大于或等于2的正整数；N个服务质量流是所述终端设备在所述第一通信系统中的服务质量流。
本申请实施例中，在接入与移动性管理功能网元需要回收EBI时，会话管理功能网元通过比较服务质量流的ARP的大小，就能够确定是否可以回收该EBI，从而接入与移动性管理功能网元根据会话管理功能网元的指示合理回收EBI。
结合第五方面，在第五方面的一种可能的设计中，该响应消息还包括所述N个服务质量流的优先级的最大优先级，所述最大优先级用于所述接入与移动性管理功能网元将所述第一承载的标识对应的优先级记录为所述最大优先级。以便于在接入与移动性管理功能网元需要回收EBI时，通过比较服务质量流的ARP的大小，就能够筛选出较小ARP对应的EBI，从而合理回收EBI。
第六方面，本申请实施例提供一种通信方法，该方法可应用于上述第一通信装置，该方法包括：
在创建终端设备在第一通信系统中的第一服务质量流的过程中，确定第一服务质量流需要移动到第二通信系统的承载；
根据第一服务质量流的业务标识，确定与第一服务质量流的业务标识相关的终端设备的N-1个服务质量流的优先级，N为大于或等于2的正整数；
从第一服务质量流的优先级和N-1个服务质量流的优先级中确定最大优先级；
向第二通信系统的接入与移动性管理功能网元发送请求消息，该请求消息用于请求为第一服务质量流分配的第二通信系统的承载的标识，该请求消息包括最大优先级。
这样，可以保证EBI对应首个被创建的服务质量流的ARP为最大值，AMF按照现有的回收机制，通过比较服务质量流之间的ARP的大小，也可以直接确定出EBI是否可以被回收，不需要再与会话管理功能网元协商。
结合第六方面，在第六方面的一种可能的设计中，服务质量流为非保证比特速率服务质量流，优先级可以为ARP。
结合第六方面，在第六方面的一种可能的设计中，向NWDAF发送请求消息，所述请求消息包括所述第一服务质量流的业务标识；
接收来自所述NWDAF的响应消息，所述响应消息包括所述M个业务标识和/或所述M个业务标识中每个业务标识对应的优先级，M大于或等于N-1，M为正整数；
所述根据所述第一服务质量流的业务标识，确定与所述第一服务质量流的业务标识相关的所述终端设备的N-1个服务质量流的优先级，包括：
根据所述M个的业务标识和第一服务质量流的业务标识，和/或，所述M个业务标识中每个业务标识对应的优先级和第一服务质量流的优先级，确定与所述第一服务质量流的业务标识相关的所述终端设备的N-1个服务质量流的优先级。
第七方面，本申请提供一种第一通信装置，该装置可以是会话管理功能网元，也可以是会话管理功能网元内的芯片。该装置具有实现上述第一方面、第二方面、第四方面、第五方面或第六方面的各实施例的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
在一种可能的设计中，当该装置为会话管理功能网元时，会话管理功能网元包括：收发单元，可选地，还包括处理单元。所述处理单元例如可以是处理器，所述接收单元例如可以是接收器，所述发送单元，例如可以是发送器，所述接收器和发送器包括射频电路。可选地，所述会话管理功能网元还包括存储单元，该存储单元例如可以是存储器。当会话管理功能网元包括存储单元时，该存储单元存储有计算机执行指令，该处理单元与该存储单元连接，该处理单元执行该存储单元存储的计算机执行指令，以使该会话管理功能网元执行上述第一方面、第二方面、第四方面、第五方面或第六方面任意一项的方法。
在另一种可能的设计中，当该装置为会话管理功能网元内的芯片时，芯片包括：接收单元和发送单元，可选地，还包括处理单元。所述处理单元例如可以是处理电路，所述接收单元例如可以是输入接口、管脚或电路等，所述发送单元例如可以是输出接口、管脚或电路等。该处理单元可执行存储单元存储的计算机执行指令，以使上述第一方面、第二方面、第四方面、第五方面或第六方面任意一项的发送方法被执行。可选地，所述存储单元为所述芯片内的存储单元，如寄存器、缓存等，所述存储单元还可以是所述终端内的位于所述芯片外部的存储单元，如只读存储器(read-only memory，ROM)、可存储静态信息和指令的其他类型的静态存储设备、随机存取存储器(random access memory，RAM)等。
其中，上述任一处提到的处理器，可以是一个通用的中央处理器(Central Processing Unit，CPU)，微处理器，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制上述第一方面、第二方面、第四方面、第五方面或第六方面的方法的程序执行的集成电路。
第八方面，本申请提供一种第二通信装置，该装置可以是接入与移动性管理功能网元，也可以是接入与移动性管理功能网元内的芯片。该装置具有实现上述第三方面的各实施例的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
在一种可能的设计中，当该装置为接入与移动性管理功能网元时，接入与移动性管理功能网元包括：收发单元，可选地，还包括处理单元。所述处理单元例如可以是处理器，所述接收单元例如可以是接收器，所述发送单元，例如可以是发送器，所述接收器和发送器包括射频电路。可选地，所述接入与移动性管理功能网元还包括存储单元，该存储单元例如可以是存储器。当接入与移动性管理功能网元包括存储单元时，该存储单元存储有计算机执行指令，该处理单元与该存储单元连接，该处理单元执行该存储单元存储的计算机执行指令，以使该接入与移动性管理功能网元执行上述第三方面任意一项的方法。
在另一种可能的设计中，当该装置为接入与移动性管理功能网元内的芯片时，芯片包括：接收单元和发送单元，可选地，还包括处理单元。所述处理单元例如可以是处理电路，所述接收单元例如可以是输入接口、管脚或电路等，所述发送单元例如可以是输出接口、 管脚或电路等。该处理单元可执行存储单元存储的计算机执行指令，以使上述第三方面任意一项的发送方法被执行。可选地，所述存储单元为所述芯片内的存储单元，如寄存器、缓存等，所述存储单元还可以是所述终端内的位于所述芯片外部的存储单元，如只读存储器(read-only memory，ROM)、可存储静态信息和指令的其他类型的静态存储设备、随机存取存储器(random access memory，RAM)等。
其中，上述任一处提到的处理器，可以是一个通用的中央处理器(Central Processing Unit，CPU)，微处理器，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制上述第三方面的方法的程序执行的集成电路。
第九方面，本申请提供一种通信系统，包括上述第七方面任一种设计示例中的第一通信装置和上述第八方面任一种设计示例中的第二通信装置。可选地，所述该通信系统中还包括网络数据分析功能(network data analytics function，NWDAF)网元。
在本申请的实施例中，第一通信系统可以是5G通信系统，第二通信系统可以是4G通信系统。
第十方面，本申请实施例提供一种芯片系统，该芯片系统包括处理器，还可以包括存储器，用于实现上述第一方面、第二方面、第四方面、第五方面或第六方面任一种设计示例中第一通信装置执行的方法。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
第十一方面，本申请实施例提供一种芯片系统，该芯片系统包括处理器，还可以包括存储器，用于实现上述第三方面任一种设计示例中第二通信装置执行的方法。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
第十二方面，本申请实施例中还提供一种计算机可读存储介质，存储介质中存储有计算机程序或指令，当计算机程序或指令被执行时，可实现上述第一方面任一种设计示例中第一通信装置执行的方法。
第十三方面，本申请实施例中还提供一种计算机可读存储介质，存储介质中存储有计算机程序或指令，当计算机程序或指令被执行时，可实现上述第二方面任一种设计示例中第一通信装置执行的方法。
第十四方面，本申请实施例中还提供一种计算机可读存储介质，存储介质中存储有计算机程序或指令，当计算机程序或指令被执行时，可实现上述第四方面任一种设计示例中第一通信装置执行的方法。
第十五方面，本申请实施例中还提供一种计算机可读存储介质，存储介质中存储有计算机程序或指令，当计算机程序或指令被执行时，可实现上述第五方面任一种设计示例中第一通信装置执行的方法。
第十六方面，本申请实施例中还提供一种计算机可读存储介质，存储介质中存储有计算机程序或指令，当计算机程序或指令被执行时，可实现上述第六方面任一种设计示例中第一通信装置执行的方法。
第十七方面，本申请实施例中还提供一种计算机可读存储介质，存储介质中存储有计算机程序或指令，当计算机程序或指令被执行时，可实现上述第三方面任一种设计示例中第二通信装置执行的方法。
第十八方面，本申请实施例中还提供一种计算机程序产品，包括指令，当其在计算机上运行时，使得计算机执行上述第一方面、第二方面、第四方面、第五方面或第六方面中 任一种设计示例中第一通信装置执行的方法。
第十九方面，本申请实施例中还提供一种计算机程序产品，包括指令，当其在计算机上运行时，使得计算机执行上述第三方面中任一种设计示例中第一通信装置执行的方法。
另外，第七方面至第十九方面中任一种设计方式所带来的技术效果可参见第一方面至第六方面中不同设计方式所带来的技术效果，此处不再赘述。
附图说明
图1为本申请实施例适用的一种网络架构示意图；
图2为本申请实施例提供的一种PDN连接的示意图；
图3为本申请实施例提供的PDU会话的示意图；
图4为一种分配EBI的流程示意图；
图5A至图5C为本申请提供的EBI和服务质量流之间的映射关系示意图；
图6为本申请实施例提供的第一种通信方法示意图；
图7为本申请实施例提供的第二种通信方法示意图；
图8为本申请实施例提供的第三种通信方法流程示意图；
图9为本申请实施例提供的第四种通信方法流程示意图；
图10A和图10B为本申请实施例提供的第一通信装置的结构示意图；
图11为本申请实施例提供的第二通信装置的结构示意图；
图12为本申请实施例提供的一种通信装置的另一结构示意图。
具体实施方式
为了使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施例作进一步地详细描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、第五代(5th generation，5G)系统或新无线(new radio，NR)，或者应用于未来的通信系统或其它类似的通信系统等。
本申请实施例提供的技术方案适用于支持第一通信系统与第二通信系统的互操作的场景中，其中，第一通信系统和第二通信系统分别为支持不同通信制式的系统，如此，第一通信系统也可以称为第一网络或第一制式系统，第二通信系统也可以称为第二网络或第二制式系统。例如，第一通信系统可以为5G通信系统，第二通信系统可以为4G通信系统，其中5G通信系统也可以称为5G网络或简称为5G系统，4G通信系统也可以称为EPS网络或简称为4G系统。应理解，本申请实施例中的第一通信系统和第二通信系统还可以是其他类型的通信系统，本申请并不限定。
参见图1，为本申请实施例适用的一种可能的网络架构示意图，在该网络架构中，5G网络与EPS网络共存。下面，对该网络架构中涉及的主要网元进行说明。
EPS网络可以包括以下网元：
1、(无线)接入网络(radio access network，(R)AN)网元：用于为特定区域的授权终端设备提供入网功能，并能够根据终端设备的级别，业务的需求等使用不同质量的传输 隧道。
(R)AN网元能够管理无线资源，为终端设备提供接入服务，进而完成控制信号和终端设备数据在终端设备和核心网之间的转发，(R)AN网元也可以理解为传统网络中的基站。在4G通信系统中，(R)AN网元也可以称为演进型通用陆基无线接入网(evolved universal terrestrial radio access network，E-UTRAN)或演进型基站(eNB)，如图1中所示。
需要说明的是，上述“网元”也可以称为实体、设备、装置或模块等，本申请并未特别限定。并且，在本申请中，为了便于理解和说明，在对部分描述中省略“网元”这一描述，例如，将(R)AN网元简称RAN，此情况下，该“(R)AN网元”应理解为(R)AN网元或(R)AN实体，以下，省略对相同或相似情况的说明。
2、移动性管理实体(mobility management entity，MME)，用于提供移动性管理的功能。此外，MME还可以提供合法监听以及接入授权/鉴权等功能。
3、服务网关(serving gateway，SGW)，用于提供用户数据转发等功能。
4、分组数据网络网关用户面功能(packet data network gateway user function，PGW-U)，用于提供PDN网关的用户面功能。
5、分组数据网络网关控制面功能(packet data network gateway control function，PGW-C)，用于提供PDN网关的控制面功能。
6、策略和计费规则功能(policy and charging rules function，PCRF)，用于提供指导网络行为的统一策略框架，为控制面功能网元提供策略规则信息等。
7、归属签约用户服务器(home subscriber server，HSS)，包括用户配置文件，用于执行用户的身份验证和授权，并可提供有关用户物理位置的信息。
5G网络可以包括以下网元：
1、(R)AN网元：用于为特定区域的授权终端设备提供入网功能，并能够根据终端设备的级别，业务的需求等使用不同质量的传输隧道。
在5G通信系统中，(R)AN网元也可以称为下一代接入网(next generation radio access network，NG-RAN，如图1所示)或下一代基站(gNB)。
2、接入与移动性管理功能(access and mobility management function，AMF)，用于接入管理和移动性管理的功能。此外，AMF还可以提供合法监听以及接入授权/鉴权等功能。
在一种可能的设计中，AMF可以通过N26接口与MME进行通信。在图1中，各个网元之间连线附件的字母和数字表示各个网元之间的通信接口的名称，然而，各个网元之间的通信接口还可以具有其他名称，本申请在此并不限制。
3、用户面功能(user plane function，UPF)，用于分组路由和转发以及用户面数据的服务质量(quality of service，QoS)处理或者执行等。
4、会话管理功能(session management function，SMF)，主要用于会话管理、终端设备的网络互连协议(internet protocol，IP)地址分配和管理、选择和管理用户面功能。此外，SMF还可以是策略控制和收费功能接口的终结点。
5、策略控制功能(policy control function，PCF)，用于指导网络行为的统一策略框架，为控制面功能网元(例如AMF、SMF等)提供策略规则信息等。
6、统一数据管理(unified data management，UDM)网元，用于管理签约数据。此外，还用于用户服务注册管理、处理终端设备标识、接入鉴权等。
上述网络架构中，功能相同或相近的网元可以联合设置或者合一部署。例如，UPF和PGW-U可以合设在一个设备中或者单独部署在不同的设备中，SMF和PGW-C可以合设在一个设备中或者单独部署在不同的设备中，PCF和PCRF可以合设在一个设备中或者单独部署在不同的设备中，HSS和UDM可以合设在一个设备中或者单独部署在不同的设备中，下文和图中的“+”即表示两个设备可以联合设置。
应理解，上述应用于本申请的网络架构仅是举例说明的从服务化架构的角度描述的网络架构，适用本申请实施例的网络架构并不局限于此，任何能够实现上述各个网元的功能的网络架构都适用于本申请实施例。
上述网元或者功能既可以是硬件设备中的网络元件，也可以是在专用硬件上运行软件功能，或者是平台(例如，云平台)上实例化的虚拟化功能。
在EPS网络中，UE和网络建立PDN连接(PDN connection)。每个PDN连接内可以建立至少一个承载(bearer)，PDN连接内部结构如图2所示，主要特征如下：
(1)、一个PDN连接中对应一个接入点名称(APN)以及一个接入点名称的聚合最大比特速率(APN-AMBR)。其中，APN以及APN AMBR是在UE附着过程中，MME在位置请求过程中从HSS中得到的。
(2)、一个PDN连接中，有且仅有一个默认演进分组系统承载(default EPS bearer)，在PDN连接建立过程中创建，一个default EPS bearer中可以聚合至少一个业务数据流(Service Data流s，SDF)；一个PDN连接中，还可以包含一个或多个非保证比特速率演进分组系统承载(Non guaranteed bit rate EPS bearer，Non GBR EPS bearer)，在UE或者网络侧发起的专用演进分组系统承载(dedicated EPS bearer)建立过程中创建，一个non-GBR EPS bearer中至少有一个SDF，也可以聚合其他一个或者多个SDF；一个PDN连接中还可以包含一个或多个保证比特速率演进分组系统承载(guaranteed bit rate EPS bearer，GBR EPS bearer)，在UE或者网络侧发起的dedicated EPS bearer建立过程中创建，一个GBR EPS bearer中至少有一个SDF，也可以聚合其他一个或者多个SDF。
其中，图2中的每个承载均有对应的QoS参数并用于传输对应的SDF。MME网元会为每个承载分配一个EPS承载标识(EPS bearer identity，EBI)，并且在建立承载的过程中把EPS承载标识发送给UE。对于默认承载，是在建立PDN连接过程中把EPS承载标识(bearer ID)发送给UE，对于专用承载，是在建立专用承载过程中把EPS承载标识(bearer ID)发送给UE。
其中，默认承载的Qos参数和专用承载的Qos参数不同，不同类型的EPS承载对应的Qos参数如表1所示。
表1
Figure PCTCN2020118502-appb-000001
在5G网络中，UE和网络建立PDU会话(PDU Session)。每个PDU会话内可以建立至少一个服务质量流(QoS流)，PDU会话内部结构如图3所示，主要特征如下：
(1)、一个PDU会话中对应一个DNN、一个PDU会话标识(PDU Session ID)以及一个会话聚合的最大比特速率(Session aggregate maximum bit rate，Session AMBR)。其中：DNN以及Session AMBR是在UE注册过程中，AMF在位置请求过程中从UDM中得到的；PDU Session ID是在UE发起的PDUSession建立过程中，SMF网元为之分配的；
(2)、一个PDU会话中，有且仅有一个default QoS流(默认服务质量流)，在PDU 会话建立过程中创建，一个default QoS流中可以聚合至少一个SDF。一个PDU会话中，还可以包含一个或多个非保证比特速率演进分组系统服务质量流(Non GBR QoS流)，在UE或者网络侧发起的PDU Session修改过程中创建。一个non-GBR QoS流中至少有一个SDF，也可以聚合多个SDF。一个PDU会话中，也可以包含一个或多个保证比特速率演进分组系统服务质量流(GBR QoS流)，在UE或者网络侧发起的PDU Session修改过程中创建，一个GBR QoS流中至少有一个SDF，也可以聚合多个SDF。
其中，图3中的每个QoS流均有对应的QoS参数并用于传输对应的业务数据流。SMF网元会为每个QoS流分配一个服务质量流标识(QoS流ID，QFI)，并且把QFI发送给UE。对于默认服务质量流，是在建立PDU会话过程中把QFI发送给UE，对于专用服务质量流，是在建立专用服务质量流过程中把QFI发送给UE。
其中，默认服务质量流的Qos参数和专用服务质量流的Qos参数不同，不同类型的服务质量流对应的Qos参数如表2所示。
表2
Figure PCTCN2020118502-appb-000002
在本申请的实施例中，表1和表2中的QoS参数仅仅是举例说明。QoS参数可以包括上述参数中的一个或者多个，本申请实施例并不做限定。
综上来说，在LTE网络和5G网络中的互操作中，PDU会话与PDN连接相对应，EPS承载与QoS流相对应，具体地，对应关系如表3所示。
表3
Figure PCTCN2020118502-appb-000003
终端设备可以从4G通信系统中移动(包括切换或者重定向)至5G通信系统，或者，也可以从5G通信系统中移动(包括切换或者重定向)至4G通信系统。所述终端设备，是一种具有无线通信功能的设备，可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。该终端可以是手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端、增强现实(augmented reality，AR)终端、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等； 还可以是各种形式的用户设备(user equipment，UE)，移动台(mobile station，MS)，终端设备(terminal device)。
目前，在5G侧QoS流建立过程(也就是PDU Session建立过程或者PDU Session修改过程)中，SMF+PGW-C确定QoS流需要从5G切换到4G时，为该QoS流向AMF请求分配EPS bearer ID，如图4，EPS Bearer ID的分配流程包括如下步骤：
步骤401，SMF+PGW-C触发到AMF的EPS承载标识分配请求(Namf_Communication_EBIAssignment Request)服务，向AMF请求分配EPS Bearer ID。
其中，服务操作中携带要QoS流所属的终端的终端标识SUPI、QoS流所属的终端的会话的会话标识PDU Session ID、QoS流对应的优先级ARP。需要说明的是，如果SMF+PGW-C决定为该会话中创建多个QoS流中的每个QoS流都需要分配EPS bearer ID，那么该服务操作中携带的是ARP列表，ARP列表包括多个QoS流的ARP。
步骤402，AMF根据SMF+PGW-C请求，为终端分配EPS Bearer ID。
也就是说，AMF响应SMF+PGW-C的服务操作请求，触发到SMF+PGW-C的EPS承载标识分配响应(Namf_Communication_EBIAssignment Response)服务，向SMF+PGW-C发送分配好的EPS Bearer ID。
可选的，如果步骤401中是服务操作中携带的是ARP列表，那么该步骤中，AMF在提供EPS Bearer ID的同时，还需要将每个EPS Bearer ID对应的ARP发送给SMF+PGW-C，以便于SMF+PGW-C判定哪个EBI对应到哪个ARP。
这样，AMF中可以为每个终端的每个PDU Session维护了一张EBI表格，如表4所示。从表4可以得到，每个终端的每个会话中的每个ARP都会映射有一个EPS Bearer ID。
表4
Figure PCTCN2020118502-appb-000004
目前协议规定，如果SMF+PGW-C为某个GBR QoS流对应的dedicated EPS Bearer分配EPS Bearer ID，那么该EPS Bearer ID中有且只有一个GBR QoS流与之对应，如图5A所示。
如图5B所示，default non-GBR QoS流与一个EPS Bearer ID(4G侧的default EPS bearer)与之对应，为了充分利用EPS Bearer ID资源，SMF+PGW-C还可以将一些dedicated non-GBR QoS流与该default non-GBR QoS流映射到同一个default EPS Bearer。并且选取 default non-GBR QoS流的优先级ARP为最高优先级，也就是说在AMF中维护的该EBI的ARP为default non-GBR QoS流对应的ARP。这样做的好处是，在该EBI对应的任何dedicated non-GBR QoS流被释放时，都不会导致该EBI的ARP被更新，除非整个PDU Session被释放掉，该EBI才会被回收或者释放掉。
如图5C所示，多个dedicated non-GBR QoS流映射到同一个dedicated EPS Bearer对应的EPS Bearer ID上，但是针对这种情况，目前协议规定该EBI对应的ARP以首个创建的专用非保证比特速率服务质量流(dedicated non-GBR QoS流)的ARP为该EBI的ARP，后续新建的专用非保证比特速率服务质量流(dedicated non-GBR QoS流)映射到该EBI时，即使新建的QoS流的ARP大于首个创建的ARP，SMF+PGW-C并不将其更新到AMF。
针对图5C所示的场景，示例性地，假设SMF为终端A的第一PDU会话的第一dedicated non-GBR QoS流(假设ARP为1)向AMF请求分配得到第一EBI，接着，终端的第一PDU会话的第二dedicated non-GBR QoS流(假设ARP为4)被创建，SMF将第二dedicated non-GBR QoS流映射到该第一EBI，但是没有通知AMF更新ARP，AMF上维护的该EPS承载标识对应的ARP仍为1，如表5所示。
表5
Figure PCTCN2020118502-appb-000005
现有的资源回收机制中，如果AMF已经为某个终端分配了9个EPS Bearer ID，并且发现有针对该终端的新的服务质量流的EBI申请请求，并且该的EBI申请请求中携带的ARP高于已经分配的9个EBI对应的ARP中的一个或多个，那么AMF就会将9个EBI中最低ARP对应的EPS承载标识回收，并将其分配给该终端的新申请的服务质量流。
针对上述图5C所示的场景，当5G网络为该终端A的服务质量流映射的EPS承载的数量超过最大数量(例如9)时，那么当SMF为终端A的第一PDU会话的第三dedicated non-GBR QoS流(假设ARP为3)向AMF请求分配EBI时，按照现有的资源回收机制，AMF会回收ARP为1对应的第一EBI(因为第一EBI的ARP最低)。但是，第三dedicated non-GBR QoS流对应的ARP小于第二dedicated non-GBR QoS流中的ARP，因此，AMF回收该第一EBI，然后将其分配给第三dedicated non-GBR QoS流是不合理的。因此，针 对图5C所示的场景，EPS承载标识(EPS bearer identity，EBI)存在被抢占或者被不合理回收的问题。
为此，本申请实施例提供一种通信方法，该方法可以及时更新AMF上维护的EBI对应ARP，以保证EBI资源被合理回收或合理占用。
需要说明的是，本申请实施例的下文中，以第一通信系统为5G网络，第二通信系统为EPS网络为例进行说明。
接下来结合附图介绍本申请实施例提供的技术方案。
实施例一
本申请实施例提供一种通信方法，请参见图6，为该方法的流程图。在下文的介绍过程中，以该方法应用于图1所示的网络架构为例。另外，该方法可由第一通信装置执行，该第一通信装置可以是会话管理功能网元，或为能够支持会话管理功能网元实现该方法所需的功能的通信装置，例如会话管理功能网元包括的部件，或者会话管理功能网元中的芯片系统等。
为了便于介绍，在下文中，以该方法由会话管理功能网元执行为例，对本申请实施例提供的通信方法进行详细介绍，该会话管理功能网元可以指代SMF和PGW-C联合设置的网元。
图6为本申请实施例提供的一种通信方法流程示意图，该方法可以包括如下步骤。
步骤601、会话管理功能网元在创建终端设备在第一通信系统中的第一服务质量流的过程中，确定第一服务质量流需要移动到第二通信系统的第一承载。
换句话来说，会话管理功能网元在创建终端设备在第一通信系统中的第一服务质量流的过程中，确定所述第一服务质量流需要切换或重定向到第二通信系统的第一承载。
具体地，会话管理功能网元根据接入与移动性管理功能网元与第二通信系统的移动性管理实体之间存在接口、运营商策略、单网络切片选择辅助信息(single network slice selection assistance information，S-NSSAI)、数据网络名称(data network name，DNN)以及第一服务质量流对应的策略与计费控制规则中的至少一个，确定第一服务质量流需要移动到第二通信系统的第一承载。示例性地，SMF+PGW-C根据AMF与MME之间存在N26接口、第一non-GBR QoS流所在会话的DNN或S-NSSAI等支持5G系统与EPS之间互操作(Interworking)、第一non-GBR QoS流对应的QoS参数、SMF本地运营商策略等条件中的一个或者组合，确定该第一non-GBR QoS流需要从5G系统切换到EPS，并且该第一non-GBR QoS流映射到当前已经分配的EPS Bearer ID(如EPS Bearer X)对应的EPS Bearer中。
其中，在执行步骤601之前，终端设备或者策略控制功能网元会触发会话管理功能网元创建第一服务质量流。示例性地，UE或者PCF在PDU会话修改(PDU Session Modification)流程中触发到SMF+PGW-C的第一non-GBR QoS流建立流程。具体地，在一种可能的情况下，SMF+PGW-C可以接收来自PCF的第一non-GBR服务质量流的建立请求消息，该建立请求消息中包括第一non-GBR服务质量流的ARP。另一种可能的情况下，SMF+PGW-C可以接收来自UE的第一non-GBR服务质量流的建立请求消息，然后SMF从PCF获取该第一non-GBR服务质量流的ARP。
步骤602、会话管理功能网元确定第一服务质量流的优先级在第一承载对应的N个服务质量流的优先级中最大。
其中，N个服务质量流是终端设备在第一通信系统中的服务质量流。需要说明的是，在执行上述步骤602之前，会话管理功能网元中保存有N个服务质量流的优先级与第一承载的标识之间的对应关系，也就是说，在每个服务质量流的创建过程中，会话管理功能网元会将该服务质量流的优先级与被分配的承载的标识之间的对应关系记录下来，具体过程可以参见实施例三中的对应关系生成过程，在此不再重复赘述。
其中，N个服务质量流除了包括第一服务质量流，还包括至少一个其它服务质量流，也就是说，N为大于2的正整数。示例性地，N个服务质量流包括表6所示的第一专用non-GBR QoS流(即第一服务质量流)，以及第二专用non-GBR QoS流和第三专用non-GBR QoS流，其中，三个专用non-GBR QoS流均对应第一EBI，第一专用non-GBR QoS流的ARP为4，第二专用non-GBR QoS流的ARP为2，第三专用non-GBR QoS流的ARP为1，因此，第一专用non-GBR QoS流的ARP为三个专用non-GBR QoS流中的最大ARP。
表6
Figure PCTCN2020118502-appb-000006
步骤603，会话管理功能网元向第一通信系统的接入与移动性管理功能网元发送第一服务质量流的第一信息。
其中，第一信息包括第一服务质量流的优先级。示例性地，SMF+PGW-C向AMF发送第一专用non-GBR QoS流的ARP。
在一种可能的实施例中，第一信息还包括第一承载的标识。示例性地，SMF+PGW-C向AMF发送第一专用non-GBR QoS流的ARP和与其对应的第一EBI。
步骤604，接入与移动性管理功能网元将第一承载的标识对应的优先级记录为第一服务质量流的优先级。
或者说，接入与移动性管理功能网元将第一承载的标识对应的优先级设置或更新为第一服务质量流的优先级。
示例性地，如表6所示，假设第二专用non-GBR QoS流创建于第一专用non-GBR QoS 流之前，且在第一专用non-GBR QoS流创建之前，AMF中保存的第一EBI对应的ARP为第二专用non-GBR QoS流的ARP(ARP为2)。如表7所示。
表7
EBI ARP
第一EBI 2
当AMF接收来自SMF+PGW-C的第一专用non-GBR QoS流的ARP之后，AMF将第一EBI对应的ARP更新为第一专用non-GBR QoS流的ARP(ARP为4)，如表8所示。
表8
EBI ARP
第一EBI 4
这样，AMF上第一EBI对应ARP始终是最大的，所以AMF在回收EBI时，按照现有的回收机制，通过比较专用non-GBR QoS流的ARP的大小，就能够确定较小ARP对应的EBI，从而合理回收EBI。
步骤605，会话管理功能网元确定需要释放第一服务质量流。
其中，在执行步骤605之前，终端设备或者策略控制功能网元会触发会话管理功能网元释放第一服务质量流。示例性地，UE或者PCF在PDU会话修改(PDU Session Modification)流程中触发到SMF+PGW-C的第一non-GBR QoS流释放流程。SMF+PGW-C根据接收到的PDU会话修改消息，确定需要释放第一服务质量流。
步骤606，会话管理功能网元向接入与移动性管理功能网元发送第二信息，第二信息包括第二服务质量流的优先级。
其中，第二服务质量流的优先级为N个服务质量流中除了第一服务质量流之外的N-1个服务质量流的优先级的最大优先级。接续上例，SMF+PGW-C从表6所示的三个专用non-GBR QoS流中第一专用non-GBR QoS流之外的第二专用non-GBR QoS流和第三non-GBR QoS流中，确定剩余两个专用non-GBR QoS流的ARP中的最大ARP为2，因此SMF+PGW-C向AMF发送第二专用non-GBR QoS流的ARP(ARP为2)。
在一种可能的实施例中，第二信息还包括第一承载的标识。接续上例，SMF+PGW-C向AMF发送第二专用non-GBR QoS流的ARP(ARP为2)和与其对应的第一EBI。
步骤607，接入与移动性管理功能网元将第一承载的标识对应的优先级记录为所述第二服务质量流的优先级。
或者说，接入与移动性管理功能网元将第一承载的标识对应的优先级设置或更新为第一服务质量流的优先级。
示例性地，如表6所示，AMF将第一EBI对应的ARP更新为第二专用non-GBR QoS流的ARP(ARP为2)。
需要说明的是，上述步骤601至步骤604所示的第一服务质量流的创建流程，以及步骤605至步骤607所示的第一服务质量流的释放流程可以解耦，即可以分别单独执行。
需要说明的是，上述步骤601至步骤604所示的第一服务质量流的创建流程，以及步骤605至步骤607所示的第一服务质量流的释放流程可以除了针对专有non-GBR QoS流，也可以针对专有GBR QoS流。本发明中关于专有non-GBR QoS流的描述都适用于专有 GBR QoS流，不再赘述。
在一种可能的实施例中，在执行上述步骤603或步骤606之前，会话管理功能网元还可能执行步骤608。
步骤608，会话管理功能网元需要确定接入与移动性管理功能网元为该终端设备在第二通信系统中分配的承载标识总数超过设定阈值。
也就是说，会话管理功能网元确定接入与移动性管理功能网元为该终端设备在第二通信系统中分配的承载标识总数超过设定阈值时，才发送第一信息或第二信息；反之，则不发送第一信息或第二信息。这样的话，会话管理功能网元在该终端设备在第二通信系统中分配的承载标识总数不超过设定阈值，就不通知接入与移动性管理功能网元更新优先级信息，一定程度上可以减小信令开销。
具体地，会话管理功能网元可以按照如下任意一种方式确定该终端设备在第二通信系统中分配的承载标识总数超过设定阈值。
方式一，会话管理功能网元可以接收来自接入与移动性管理功能网元的指示信息，该指示信息用于指示接入与移动性管理功能网元为终端设备分配的第二通信系统的承载的标识总数超过设定阈值，会话管理功能网元根据该指示信息，确定接入与移动性管理功能网元为终端设备在第二通信系统中分配的承载标识总数超过设定阈值，例如设定阈值为9。
其中，一种可能的情况下，该指示信息为被回收(revoke)的承载的标识。示例性地，在创建终端设备的第一服务质量流之前，若会话管理功能网元需要创建终端设备在第一通信系统中的第三服务质量流，则会话管理功能网元向接入与移动性管理功能网元发送请求消息，该请求消息用于请求接入与移动性管理功能网元为第三服务质量流分配第二通信系统的承载的标识。由于接入与移动性管理功能网元确定为该终端设备的服务质量流映射的EPS承载的数量超过设定阈值(例如9)，因此为该第三服务质量流回收EBI，并向会话管理功能网元发送该被回收(revoke)的EBI，从而会话管理功能网元可以根据该被回收的EBI，确定接入与移动性管理功能网元为终端设备分配的第二通信系统的承载的标识总数超过设定阈值。在另一种可能的情况下，该指示信息为控制面信令，例如比特位为“1”代表接入与移动性管理功能网元为终端设备分配的第二通信系统的承载的标识总数超过设定阈值，反之，比特位为“0”代表接入与移动性管理功能网元为终端设备分配的第二通信系统的承载的标识总数小于或等于设定阈值。
方式二，会话管理功能网元向接入与移动性管理功能网元发送查询请求，该查询请求用于请求查询接入与移动性管理功能网元为终端设备分配的第二通信系统的承载的标识总数是否超过设定阈值；接入与移动性管理功能网元会向会话管理功能网元发送查询响应，该查询响应包括承载的标识总数是否超过设定阈值的查询结果。
本申请实施例中，按照上述优先级的更新方式，接入与移动性管理功能网元上始终维护着各个EBI对应最大ARP，因此在接入与移动性管理功能网元需要回收EBI时，通过比较服务质量流的ARP的大小，就能够筛选出较小ARP对应的EBI，从而合理回收EBI。
实施例二
本申请实施例提供第二种通信方法，参见图7，为该方法的流程图。在下文的介绍过程中，以该方法应用于图1所示的网络架构为例。另外，该方法可由第二通信装置执行，该第二通信装置可以是接入与移动性管理功能网元，或为能够支持接入与移动性管理功能 网元实现该方法所需的功能的通信装置，例如接入与移动性管理功能网元包括的部件，或者接入与移动性管理功能网元中的芯片系统等。
为了便于介绍，在下文中，以该方法由接入与移动性管理功能网元执行为例，对本申请实施例提供的通信方法进行详细介绍，该接入与移动性管理功能网元可以指代5G系统中的AMF。
图7为本申请实施例提供的一种通信方法流程示意图，该方法可以包括如下步骤。
步骤701、会话管理功能网元在创建终端设备在第一通信系统中的第一服务质量流的过程中，确定该第一服务质量流需要移动到第二通信系统的第一承载。
具体方法可以参见上述步骤601，在此不再重复赘述。
步骤702，会话管理功能网元向接入与移动性管理功能网元发送第一请求消息，该第一请求消息用于请求为第一服务质量流分配第二通信系统的第一承载的标识。
示例性地，SMF+PGW-C触发到AMF的EPS承载标识分配请求(Namf_Communication_EBIAssignment Request)服务，向AMF请求分配EPS承载标识。
步骤703，接入与移动性管理功能网元为该终端分配第一服务质量流在第二通信系统中对应的第一承载的标识，并建立第一服务质量流的优先级与第一服务质量流在第二通信系统中对应的第一承载的标识的对应关系。
这样，接入与移动性管理功能网元就可以保存有终端设备的每个服务质量流和对应的ARP之间的对应关系。如果终端设备的N个服务质量流均对应第一承载，那么接入与移动性管理功能网元上就保存有N个服务质量流对应的N个优先级。示例性地，如表6中的三个专用non-GBR QoS流，专用non-GBR QoS流均对应第一EBI，所以按照本实施例提供的方法，AMF上就保存有表9所示的对应关系。
表9
Figure PCTCN2020118502-appb-000007
步骤704，接入与移动性管理功能网元向会话管理功能网元发送该第一承载的标识。
示例性地，AMF响应SMF+PGW-C的服务操作请求，触发到SMF+PGW-C的EPS承载标识分配响应(Namf_Communication_EBIAssignment Response)服务，向SMF+PGW-C发送EPS承载标识。
上述步骤701至步骤704为接入与移动性管理功能网元分配EBI的过程，在这一过程中，AMF上保存有EBI和至少两个ARP之间的对应关系，基于这一对应关系，该方法还可以包括如下EBI回收再分配流程：
步骤705，会话管理功能网元在创建终端设备在第一通信系统中的第二服务质量流的过程中，确定第二服务质量流需要移动到第二通信系统的第一承载。
具体确定方法可以参见上述步骤601，在此不再重复赘述。
步骤706，会话管理功能网元向移动性管理功能网元发送第二请求消息，该请求消息用于请求分配第二通信系统的第一承载。
示例性地，SMF+PGW-C触发到AMF的EPS承载标识分配请求 (Namf_Communication_EBIAssignment Request)服务，向AMF请求分配EPS承载标识。
步骤707，当确定接入与移动性管理功能网元为终端设备在第二通信系统中分配的承载标识总数超过设定阈值时，接入与移动性管理功能网元确定第二服务质量流的优先级是否大于N个服务质量流中的最大优先级，若大于，则执行步骤708a至步骤709，否则执行步骤708b。
步骤708a，接入与移动性管理功能网元回收该第一承载，为第二服务质量流分配该第一承载的标识，并建立第二服务质量流的优先级与该第一承载的标识的对应关系。
具体来说，AMF确定为该终端设备的服务质量流映射的EPS承载的数量超过设定阈值(例如9)，那么AMF需要对EBI进行回收。假设第二服务质量流的ARP为5，那么第二服务质量流的ARP大于表9中的最大ARP(ARP为4)，AMF回收该第一EBI，将其分配给第二服务质量流，另外，AMF建立如表10所示的第一EBI与ARP的对应关系。
表10
EBI ARP
第一EBI 5
步骤708b，接入与移动性管理功能网元不作响应。
具体来说，AMF确定为该终端设备的服务质量流映射的EPS承载的数量超过设定阈值(例如9)，那么AMF需要对EBI进行回收。假设第二服务质量流的ARP为3，那么第二服务质量流的ARP并不大于表9中的最大ARP(ARP为4)，因此AMF拒绝为第二服务质量流分配EBI，即不向SMF发送响应消息。
在一种可能的实施例中，上述方法还包括如下服务质量流释放流程：
步骤710，会话管理功能网元向接入与移动性管理功能网元发送释放请求消息，该释放请求消息用于请求释放第二通信系统的第一承载。
步骤711，接入与移动性管理功能网元收到释放请求后，解除所述第一服务质量流的优先级与第一承载的标识的对应关系。
需要说明的是，上述步骤701至步骤704所示的对应关系的建立流程，以及步骤705至步骤709所示的EBI的回收再分配流程，以及步骤710至步骤711所示的服务质量流的释放流程是可以解耦的，即可以分别单独执行。
本申请实施例中，按照上述优先级的更新方式，接入与移动性管理功能网元上始终维护着各个EBI分别对应的ARP，因此在接入与移动性管理功能网元需要回收EBI时，通过比较服务质量流之间的ARP的大小，就能够筛选出较小ARP对应的EBI，从而合理回收EBI。
实施例三
本申请实施例提供第三种通信方法，请参见图8，为该方法的流程图。在下文的介绍过程中，以该方法应用于图1所示的网络架构为例。该方法仍可由第一通信装置执行。
图8为本申请实施例提供的第三种通信方法流程示意图，该方法可以包括如下步骤。
步骤801、会话管理功能网元在创建终端设备在第一通信系统中的第一服务质量流的过程中，确定所述第一服务质量流需要移动到第二通信系统的第一承载。
具体方法可以参见上述步骤601，在此不再重复赘述。
步骤802，会话管理功能网元向接入与移动性管理功能网元发送第一请求消息，该第一请求消息用于请求为第一服务质量流分配第二通信系统的第一承载。
步骤803，接入与移动性管理功能网元为该终端分配第一服务质量流在第二通信系统中对应的第一承载的标识，向会话管理功能网元发送该第一承载的标识。
示例性地，AMF响应SMF+PGW-C的服务操作请求，触发到SMF+PGW-C的EPS承载标识分配响应(Namf_Communication_EBIAssignment Response)服务，向SMF+PGW-C发送EPS承载标识。
步骤804，会话管理功能网元接收第一承载的标识，建立第一服务质量流的优先级与第一服务质量流在第二通信系统中对应的第一承载的标识的对应关系。
按照上述方法，会话管理功能网元就可以保存有终端设备的每个服务质量流和对应的ARP之间的对应关系。如果终端设备的N个服务质量流均对应第一承载，那么会话管理功能网元上就保存有N个服务质量流对应的N个优先级。示例性地，如表6中的三个专用non-GBR QoS流，专用non-GBR QoS流均对应第一EBI，所以按照本实施例提供的方法，SMF上就保存有表9所示的对应关系。
上述步骤801至步骤804为对应关系的建立过程，在这一过程中，SMF上保存有EBI和至少两个ARP之间的对应关系，基于这一对应关系，该方法还可以包括如下EBI回收再分配流程：
步骤805，会话管理功能网元在创建终端设备在第一通信系统中的第二服务质量流的过程中，确定第二服务质量流需要移动到第二通信系统的第一承载。
具体确定方法可以参见上述步骤601，在此不再重复赘述。
步骤806，会话管理功能网元向接入与移动性管理功能网元发送第二请求消息，该第一请求消息用于请求为第二服务质量流分配第二通信系统的承载的标识。
步骤807，接入与移动性管理功能网元确定为该终端设备在第二通信系统中分配的承载标识总数是否超过设定阈值，若是，则执行步骤808至步骤811b，若否，则执行步骤812。
步骤808，接入与移动性管理功能网元向会话管理功能网元发送第三请求消息，该第三请求消息包括被请求回收的第一承载的标识，以及该第一承载的标识对应的优先级。
步骤809，会话管理功能网元接收该第三请求消息之后，确定该第一承载的标识对应的优先级是否小于或等于N个服务质量流的优先级的最大优先级。若是，则执行步骤810a，否则执行步骤810b。
步骤810a，会话管理功能网元向接入与移动性管理功能网元发送否定响应消息，该否定响应消息包括拒绝回收该承载的标识的指示信息。
在一种可能的实施例中，该响应消息还包括N个服务质量流的优先级的最大优先级，以便于接入与移动性管理功能网元将所述第一承载的标识对应的优先级记录为所述最大优先级。
步骤810b，会话管理功能网元向接入与移动性管理功能网元发送肯定响应消息，该肯定响应消息包括同意回收该承载的标识的指示信息。
步骤811a，当接入与移动性管理功能网元接收到肯定响应消息，则向会话管理功能网元分配该承载的标识。
步骤811b，当接入与移动性管理功能网元接收到否定响应消息，则向会话管理功能网元不回收该承载的标识，即不作响应。
步骤812，接入与移动性管理功能网元为第二服务质量流分配承载的标识，并向会话管理功能网元发送该被分配的承载的标识。
在一种可能的实施例中，上述方法还包括如下服务质量流释放流程：
步骤813，在终端设备的第一通信系统中的第一服务质量流的释放过程中，会话管理功能网元解除第一服务质量流的优先级与第一承载的标识的对应关系。
示例性地，如表6中的三专用non-GBR QoS流均对应第一EBI，当第一专用non-GBR QoS流被释放时，所以按照本实施例提供的方法，SMF上就保存有表11所示的对应关系。
表11
Figure PCTCN2020118502-appb-000008
按照上述方法，会话管理功能网元上就可以始终保存有EBI和各个ARP的最新对应关系，从而便于会话管理功能网元确定EBI是否可被回收。
需要说明的是，上述实施例中提及的回收，还可以表达为撤销、取消、释放等，本申请对此并不作限定。
另外，上述步骤801至步骤804所示的对应关系的建立流程，以及步骤805至步骤812所示的EBI的回收再分配流程，以及步骤813所示的服务质量流的释放流程是可以解耦的，即可以分别单独执行。
本申请实施例中，因会话管理功能网元上维护着各个EBI分别对应的ARP，因此在接入与移动性管理功能网元不确定是否能够回收EBI时，接入与移动性管理功能网元会向会话管理功能网元发送请求，由会话管理功能网元通过比较服务质量流之间的ARP的大小，从而确定EBI最终是否可以被回收，接入与移动性管理功能网元根据会话管理功能网元的指示合理回收EBI。
实施例四
本申请实施例提供第四种通信方法，请参见图9，为该方法的流程图。在下文的介绍过程中，以该方法应用于图1所示的网络架构为例。该方法仍可由第一通信装置执行。
图9为本申请实施例提供的第四种通信方法流程示意图，该方法可以包括如下步骤。
步骤901、会话管理功能网元在创建终端设备在第一通信系统中的第一服务质量流的过程中，确定第一服务质量流需要移动到第二通信系统的第一承载。
示例性地，UE或者PCF在PDU Session Modification流程中触发SMF+PGW-C的建立non-GBR QoS流，SMF+PGW-C确定待创建的non-GBR QoS流的业务标识(例如Application ID)以及ARP，并确定该non-GBR QoS流需要向接入与移动性管理功能网元请求分配EPS Bearer ID。
步骤902，会话管理功能网元向网络数据分析功能(network data analytics function，NWDAF)网元发送请求消息，该请求消息包括第一服务质量流的业务标识。该请求消息用于请求与第一服务质量流同类业务的业务标识和/或每个业务标识对应的优先级。
在一种可能的实施例中，该请求消息还可以包括第一服务质量流的ARP、终端设备的 标识等。示例性地，SMF触发到NWDAF的Nnwdaf_AnalyticsInfo_Request服务操作，向NWDAF请求与该待创建的non-GBR QoS流的Application ID同类的业务的ARP。服务操作中可以携带待创建的non-GBR QoS流的Application ID、ARP信息、终端标识(SUPI)等。
步骤903，会话管理功能网元接收来自NWDAF的响应消息，该响应消息包括第一服务质量流同类业务的M个业务标识和/或M个业务标识中每个业务标识对应的优先级。
具体地，SMF+PGW-C接收从NWDAF的Nnwdaf_AnalyticsInfo_Request response服务操作，服务操作中包括与待创建的non-GBR QoS流的Application ID同类的Application ID列表以及每个业务的ARP信息。示例性地，NWDAF对历史数据进行分析，得出SMF+PGW-C总是将一些VoIP业务(比如微信语音业务、微信视频业务等)对应的5G侧non-GBR QoS流聚合到同一个EPS承载中，于是，NWDAF可以将该类VoIP业务的ARP或业务标识发送给SMF+PGW-C。
步骤904，会话管理功能网元根据M个的业务标识和第一服务质量流的业务标识，和/或，会话管理功能网元根据M个业务标识中每个业务标识对应的优先级和第一服务质量流的优先级，确定与第一服务质量流的业务标识相关的N-1个服务质量流的优先级。
示例性地，SMF+PGW-C根据NWDAF反馈的数据分析结果，从一个或多个业务对应的ARP中，选择可能与第一服务质量流发生聚合的N-1个服务质量流的ARP。
步骤905，会话管理功能网元从第一服务质量流的优先级和N-1个服务质量流的优先级中确定最大优先级。
示例性地，SMF+PGW-C取ARP中最大值作为该待创建的non-GBR QoS流的ARP。
步骤906，会话管理功能网元向接入与移动性管理功能网元发送第二请求消息，该第二请求消息用于请求为第一服务质量流分配第二通信系统的承载，以及包括最大优先级。
示例性地，SMF+PGW-C通过Namf_Communication_EBIAssignment服务操作向AMF请求EPS承载标识。
步骤907，接入与移动性管理功能网元向会话管理功能网元发送第二响应消息，该第二响应消息包括承载的标识。
步骤908，接入与移动行管理功能网元建立该承载的标识和最大优先级之间的对应关系。
这样，因待创建的服务质量流为该EBI的首个被创建的服务质量流，且EBI对应ARP已经为最大值，所以后续即使有新的服务质量流被创建，AMF也可以不用再更新该EBI对应的ARP，之后AMF按照现有的回收机制，通过比较服务质量流之间的ARP的大小，也可以直接确定出EBI是否可以被回收，不需要再与SMF+PGW-C协商。
针对于上述实施例一至实施例四，需要说明的是：实施例中所描述的各个流程图的步骤编号仅为执行流程的一种示例，并不构成对步骤执行的先后顺序的限制，本申请实施例中相互之间没有时序依赖关系的步骤之间没有严格的执行顺序。
为了实现上述本申请实施例提供的通信方法中的各功能，终端可以包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。
与上述实施例的构思相同，本申请实施例还提供一种第一通信装置1000，该第一通信装置1000用于实现上述方法中会话管理功能网元的功能。示例地，该第一通信装置1000可以是会话管理功能网元，也可以是会话管理功能网元中的装置。该装置可以为芯片系统。本申请实施例中，芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
一示例中，如图10A所示，第一通信装置1000包括确定单元1001和发送单元1002。
针对上述图6所示的方法，确定单元1001，用于在创建终端设备在第一通信系统中的第一服务质量流的过程中，确定所述第一服务质量流需要移动到第二通信系统的第一承载；确定所述第一服务质量流的优先级在所述第一承载对应的N个服务质量流的优先级中最大；
发送单元1002，用于向所述第一通信系统的接入与移动性管理功能网元发送所述第一服务质量流的第一信息，所述第一信息包括所述第一服务质量流的优先级，所述第一信息用于所述接入与移动性管理功能网元将所述第一承载的标识对应的优先级记录为所述第一服务质量流的优先级，所述N个服务质量流包括所述第一服务质量流；N为大于或等于2的正整数。
在一些实施例中，所述服务质量流可以为非保证比特速率服务质量流。
在一些实施例中，所述第一信息还包括：所述第一承载的标识。
在一些实施例中，第一服务质量流的优先级可以为第一服务质量流的ARP。
在一些实施例中，所述确定单元1001，还用于确定需要释放所述第一服务质量流；
所述发送单元1002，还用于向所述接入与移动性管理功能网元发送第二信息，所述第二信息包括第二服务质量流的优先级，所述第二信息用于所述接入与移动性管理功能网元将所述第一承载的标识对应的优先级记录为所述第二服务质量流的优先级，所述第二服务质量流的优先级为所述N个服务质量流中除了所述第一服务质量流之外的N-1个服务质量流的优先级的最大优先级。
在一些实施例中，所述第二信息还包括所述第一承载的标识。
在一些实施例中，所述装置还包括接收单元1003；
所述接收单元1003，用于接收来自所述接入与移动性管理功能网元的指示信息，所述指示信息用于指示所述接入与移动性管理功能网元为所述终端设备分配的第二通信系统的承载的标识总数超过设定阈值；
所述确定单元1001，在所述发送单元1002向所述第一通信系统的接入与移动性管理功能网元发送第一服务质量流的优先级之前，还根据所述指示信息，确定所述接入与移动性管理功能网元为所述终端设备在第二通信系统中分配的承载标识总数超过设定阈值。
在一些实施例中，所述指示信息为被回收的承载的标识。
在一些实施例中，所述发送单元1002，还用于在创建所述终端设备的第一通信系统中的第三服务质量流时，向所述接入与移动性管理功能网元发送请求消息，所述请求消息用于请求所述接入与移动性管理功能网元为所述第三服务质量流分配所述第二通信系统的承载的标识；
所述接收单元1003在接收来自所述接入与移动性管理功能网元的指示信息时，具体用于：
接收来自所述接入与移动性管理功能网元的响应消息，所述响应消息包括所述指示信息。
在一些实施例中，所述确定单元1001确定所述第一服务质量流需要移动到第二通信 系统的第一承载时，具体用于：
根据所述接入与移动性管理功能网元与所述第二通信系统的移动性管理实体之间存在接口、运营商策略、单网络切片选择辅助信息、数据网络名称以及所述第一服务质量流对应的策略与计费控制规则中的至少一个，确定所述第一服务质量流需要移动到所述第二通信系统的第一承载。
关于处理单元1001、发送单元1002和接收单元1003的具体执行过程和有益效果，可参见上图6相关的方法中的记载。
针对上述图8所示的方法，接收单元1003，用于接收来自接入与移动性管理功能网元的请求消息，所述请求消息包括被请求回收的承载的标识以及所述承载的标识对应的优先级；
确定单元1001，用于确定所述承载的标识对应的优先级小于或等于N个服务质量流的优先级的最大优先级，其中，所述N个服务质量流均对应于所述承载的标识，N为大于或等于2的正整数；
发送单元1002，用于向所述接入与移动性管理功能网元发送响应消息，所述响应消息包括指示信息，所述指示信息用于拒绝回收所述承载的标识。
在一些实施例中，响应消息还包括所述N个服务质量流的优先级的最大优先级，所述最大优先级用于所述接入与移动性管理功能网元将所述第一承载的标识对应的优先级记录为所述最大优先级。
关于确定单元1001、发送单元1002和接收单元1003的具体执行过程和有益效果，可参见上图8相关的方法中的记载。
针对上述图9所示的方法，确定单元1001，用于在创建终端设备在第一通信系统中的第一服务质量流的过程中，确定所述第一服务质量流需要移动到第二通信系统的承载；根据所述第一服务质量流的业务标识，确定与所述第一服务质量流的业务标识相关的所述终端设备的N-1个服务质量流的优先级，N为大于或等于2的正整数；从所述第一服务质量流的优先级和所述N-1个服务质量流的优先级中确定最大优先级；
发送单元1002，用于向所述第二通信系统的接入与移动性管理功能网元发送请求消息，所述请求消息用于请求为第一服务质量流分配所述第二通信系统的承载的标识，所述请求消息包括所述最大优先级。
在一些实施例中，所述服务质量流为非保证比特速率服务质量流。
在一些实施例中，所述优先级为分配保持优先级ARP。
在一些实施例中，所述发送单元1002，还用于向NWDAF发送请求消息，所述请求消息包括所述第一服务质量流的业务标识；
所述装置还包括接收单元1003；
所述接收单元1003，还用于接收来自所述NWDAF的响应消息，所述响应消息包括所述M个业务标识和/或所述M个业务标识中每个业务标识对应的优先级，M大于或等于N-1，M为正整数；
所述确定单元1001根据所述第一服务质量流的业务标识，确定与所述第一服务质量流的业务标识相关的所述终端设备的N-1个服务质量流的优先级时，具体用于：
根据所述M个的业务标识和第一服务质量流的业务标识，和/或，所述M个业务标识中每个业务标识对应的优先级和第一服务质量流的优先级，确定与所述第一服务质量流的业务标识相关的所述终端设备的N-1个服务质量流的优先级。
关于确定单元1001、发送单元1002和接收单元1003的具体执行过程和有益效果，可参见上图9相关的方法中的记载。
一示例中，如图10B所示，第一通信装置1000包括接收单元1001和建立单元1002。
针对上述图7所示的方法，接收单元1001，用于在创建终端设备在第一通信系统中的第一服务质量流的过程中，接收所述第一服务质量流的优先级；
该第一通信装置还包括建立单元1002，用于建立所述第一服务质量流的优先级与所述第一服务质量流在第二通信系统中对应的承载的标识的对应关系；
其中，所述承载的标识对应有N个服务质量流，N为大于或等于2的正整数，所述N个服务质量流包括所述第一服务质量流。
在一些实施例中，接收单元1001，还用于接收所述第二服务质量流的优先级；
该第一通信装置还包括确定单元1003；该确定单元1003，用于当确定所述接入与移动性管理功能网元为所述终端设备在第二通信系统中分配的承载标识总数超过设定阈值时，根据所述第二服务质量流的优先级以及所述N个服务质量流中的最大优先级，确定是否建立所述第二服务质量流的优先级与所述承载的标识的对应关系。
在一些实施例中，确定单元1003，还用于确定需要释放所述第一服务质量流；
所述装置还包括解除单元1004；
所述解除单元1004，用于解除所述第一服务质量流的优先级与所述第一服务质量流在第二通信系统中对应的承载的标识的对应关系。
关于接收单元1001、建立单元1002、确定单元1003和解除单元1004的具体执行过程和有益效果，可参见上图7相关的方法中的记载。
本申请实施例还提供一种第二通信装置1100，该第二通信装置1100用于实现上述方法中接入与移动性管理功能网元的功能。示例地，该第二通信装置1100可以是接入与移动性管理功能网元，也可以是接入与移动性管理功能网元中的装置。该装置可以为芯片系统。本申请实施例中，芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
一示例中，如图11所示，第二通信装置1100包括接收单元1101、建立单元1102和确定单元1103。
接收单元1101，用于在创建终端设备在第一通信系统中的第一服务质量流的过程中，接收所述第一服务质量流的优先级；
建立单元1102，用于建立所述第一服务质量流的优先级与所述第一服务质量流在第二通信系统中对应的承载的标识的对应关系；
其中，所述承载的标识对应有N个服务质量流，N为大于或等于2的正整数，所述N个服务质量流包括所述第一服务质量流。
在一些实施例中，所述接收单元1101，还用于接收所述第二服务质量流的优先级；
所述装置还包括确定单元1103；
所述确定单元1103，用于当确定所述接入与移动性管理功能网元为所述终端设备在第二通信系统中分配的承载标识总数超过设定阈值时，根据所述第二服务质量流的优先级以 及所述N个服务质量流中的最大优先级，确定是否建立所述第二服务质量流的优先级与所述承载的标识的对应关系。
在一些实施例中，所述确定单元1103，还用于确定需要释放所述第一服务质量流；
在一些实施例中，所述装置还包括解除单元1104；所述解除单元1104，用于解除所述第一服务质量流的优先级与所述第一服务质量流在第二通信系统中对应的承载的标识的对应关系。
关于接收单元1101、建立单元1102、确定单元1103和解除单元1104的具体执行过程和有益效果，可参见上图7相关的方法中的记载。
本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，另外，在本申请各个实施例中的各功能模块可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
又一示例中，如图12所示，该第一通信装置1000、第二通信装置1100包括至少一个处理器1210和存储器1220。其中，存储器1220中存储有计算机程序。存储器1220和处理器1210耦合。本申请实施例中的耦合是装置、单元或模块之间的间隔耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。作为另一种实现，存储器1220还可以位于第一通信装置1000、第二通信装置1100之外。处理器1210可以和存储器1220协同操作。处理器1210可以调用存储器1220中存储的计算机程序。所述至少一个存储器中的至少一个可以包括于处理器中。
在一些实施例中，第一通信装置1000、第二通信装置1100还可以包括通信接口1230，用于通过传输介质和其它设备进行通信，从而用于第一通信装置1000、第二通信装置1100中的装置可以和其它设备进行通信。示例性地，通信接口1230可以是收发器、电路、总线、模块或其它类型的通信接口，该其它设备可以是其它终端。处理器1210利用通信接口1230收发信息，并用于实现上述实施例中的方法。示例性的，通信接口1230用于接收资源指示信息。又示例性的，通信接口1230用于发送数据。
在本申请实施例中，处理器可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
在本申请实施例中，存储器可以是非易失性存储器，比如硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等，还可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)。存储器是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。本申请实施例中的存储器还可以是电路或者其它任意能够实现存储功能的装置，用于存储计算机程序和/或数据。
本申请实施例提供的方法中，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时，全 部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、网络设备、用户设备或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，简称DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机可以存取的任何介质或者是包含一个或多个介质集成的服务器、数据中心等数据存储设备。所述介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，数字视频光盘(digital video disc，简称DVD))、或者半导体介质(例如，SSD)等。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (39)

  1. 一种通信方法，其特征在于，所述方法包括：
    在创建终端设备在第一通信系统中的第一服务质量流的过程中，确定所述第一服务质量流需要移动到第二通信系统的第一承载；
    确定所述第一服务质量流的优先级在所述第一承载对应的N个服务质量流的优先级中最大；
    向所述第一通信系统的接入与移动性管理功能网元发送所述第一服务质量流的第一信息，所述第一信息包括所述第一服务质量流的优先级，所述第一信息用于所述接入与移动性管理功能网元将所述第一承载的标识对应的优先级记录为所述第一服务质量流的优先级，所述N个服务质量流包括所述第一服务质量流；N为大于或等于2的正整数。
  2. 根据权利要求1所述的方法，其特征在于，所述服务质量流为非保证比特速率non-GBR服务质量流。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一信息还包括：所述第一承载的标识。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，所述第一服务质量流的优先级为第一服务质量流的分配保持优先级ARP。
  5. 根据权利要求1至4任一项所述的方法，其特征在于，所述方法还包括：
    确定需要释放所述第一服务质量流；
    向所述接入与移动性管理功能网元发送第二信息，所述第二信息包括第二服务质量流的优先级，所述第二信息用于所述接入与移动性管理功能网元将所述第一承载的标识对应的优先级记录为所述第二服务质量流的优先级，所述第二服务质量流的优先级为所述N个服务质量流中除了所述第一服务质量流之外的N-1个服务质量流的优先级的最大优先级。
  6. 根据权利要求5所述的方法，其特征在于，所述第二信息还包括所述第一承载的标识。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，所述方法还包括：
    接收来自所述接入与移动性管理功能网元的指示信息，所述指示信息用于指示所述接入与移动性管理功能网元为所述终端设备分配的第二通信系统的承载的标识总数超过设定阈值；
    所述向所述第一通信系统的接入与移动性管理功能网元发送第一服务质量流的优先级之前，还包括：
    根据所述指示信息，确定所述接入与移动性管理功能网元为所述终端设备在第二通信系统中分配的承载标识总数超过设定阈值。
  8. 根据权利要求7所述的方法，其特征在于，所述指示信息为被回收的承载的标识。
  9. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    在创建所述终端设备在所述第一通信系统中的第三服务质量流时，向所述接入与移动性管理功能网元发送请求消息，所述请求消息用于请求所述接入与移动性管理功能网元为所述第三服务质量流分配所述第二通信系统的承载的标识；
    所述接收来自所述接入与移动性管理功能网元的指示信息，包括：
    接收来自所述接入与移动性管理功能网元的响应消息，所述响应消息包括所述指示信 息。
  10. 根据权利要求1至9任一项所述的方法，其特征在于，确定所述第一服务质量流需要移动到第二通信系统的第一承载，包括：
    根据所述接入与移动性管理功能网元与所述第二通信系统的移动性管理实体之间存在接口、运营商策略、单网络切片选择辅助信息、数据网络名称以及所述第一服务质量流对应的策略与计费控制规则中的至少一个，确定所述第一服务质量流需要移动到所述第二通信系统的第一承载。
  11. 一种通信方法，其特征在于，包括：
    在创建终端设备在第一通信系统中的第一服务质量流的过程中，接收所述第一服务质量流的优先级；
    建立所述第一服务质量流的优先级与所述第一服务质量流在第二通信系统中对应的承载的标识的对应关系；
    其中，所述承载的标识对应有N个服务质量流，N为大于或等于2的正整数，所述N个服务质量流包括所述第一服务质量流。
  12. 根据权利要求11所述的方法，其特征在于，还包括：
    接收第二服务质量流的优先级；
    当确定为所述终端设备在所述第二通信系统中分配的承载标识总数超过设定阈值时，根据所述第二服务质量流的优先级以及所述N个服务质量流中的最大优先级，确定是否建立所述第二服务质量流的优先级与所述承载的标识的对应关系。
  13. 根据权利要求11或12所述的方法，其特征在于，所述方法还包括：
    确定需要释放所述第一服务质量流；
    解除所述第一服务质量流的优先级与所述第一服务质量流在第二通信系统中对应的承载的标识的对应关系。
  14. 一种通信方法，其特征在于，包括：
    接收来自接入与移动性管理功能网元的请求消息，所述请求消息包括被请求回收的承载的标识以及所述承载的标识对应的优先级；
    确定所述承载的标识对应的优先级小于或等于N个服务质量流的优先级的最大优先级，其中，所述N个服务质量流均对应于所述承载的标识，N为大于或等于2的正整数；
    向所述接入与移动性管理功能网元发送响应消息，所述响应消息包括指示信息，所述指示信息用于拒绝回收所述承载的标识。
  15. 根据权利要求14所述的方法，其特征在于，所述响应消息还包括所述N个服务质量流的优先级的最大优先级，所述最大优先级用于所述接入与移动性管理功能网元将所述第一承载的标识对应的优先级记录为所述最大优先级。
  16. 一种通信装置，其特征在于，包括：
    确定单元，用于在创建终端设备在第一通信系统中的第一服务质量流的过程中，确定所述第一服务质量流需要移动到第二通信系统的第一承载；确定所述第一服务质量流的优先级在所述第一承载对应的N个服务质量流的优先级中最大；
    发送单元，用于向所述第一通信系统的接入与移动性管理功能网元发送所述第一服务 质量流的第一信息，所述第一信息包括所述第一服务质量流的优先级，所述第一信息用于所述接入与移动性管理功能网元将所述第一承载的标识对应的优先级记录为所述第一服务质量流的优先级，所述N个服务质量流包括所述第一服务质量流；N为大于或等于2的正整数。
  17. 根据权利要求16所述的装置，其特征在于，所述服务质量流为非保证比特速率non-GBR服务质量流。
  18. 根据权利要求16或17所述的装置，其特征在于，所述第一信息还包括：所述第一承载的标识。
  19. 根据权利要求16至18任一项所述的装置，其特征在于，所述第一服务质量流的优先级为第一服务质量流的分配保持优先级ARP。
  20. 根据权利要求16至19任一项所述的装置，其特征在于，
    所述确定单元，还用于确定需要释放所述第一服务质量流；
    所述发送单元，还用于向所述接入与移动性管理功能网元发送第二信息，所述第二信息包括第二服务质量流的优先级，所述第二信息用于所述接入与移动性管理功能网元将所述第一承载的标识对应的优先级记录为所述第二服务质量流的优先级，所述第二服务质量流的优先级为所述N个服务质量流中除了所述第一服务质量流之外的N-1个服务质量流的优先级的最大优先级。
  21. 根据权利要求20所述的装置，其特征在于，所述第二信息还包括所述第一承载的标识。
  22. 根据权利要求16至21任一项所述的装置，其特征在于，所述装置还包括接收单元；
    所述接收单元，用于接收来自所述接入与移动性管理功能网元的指示信息，所述指示信息用于指示所述接入与移动性管理功能网元为所述终端设备分配的第二通信系统的承载的标识总数超过设定阈值；
    所述确定单元，在所述发送单元向所述第一通信系统的接入与移动性管理功能网元发送第一服务质量流的优先级之前，还根据所述指示信息，确定所述接入与移动性管理功能网元为所述终端设备在第二通信系统中分配的承载标识总数超过设定阈值。
  23. 根据权利要求22所述的装置，其特征在于，所述指示信息为被回收的承载的标识。
  24. 根据权利要求22所述的装置，其特征在于，
    所述发送单元，还用于在创建所述终端设备在所述第一通信系统中的第三服务质量流时，向所述接入与移动性管理功能网元发送请求消息，所述请求消息用于请求所述接入与移动性管理功能网元为所述第三服务质量流分配所述第二通信系统的承载的标识；
    所述接收单元在接收来自所述接入与移动性管理功能网元的指示信息时，具体用于：
    接收来自所述接入与移动性管理功能网元的响应消息，所述响应消息包括所述指示信息。
  25. 根据权利要求16至24任一项所述的装置，其特征在于，所述确定单元确定所述第一服务质量流需要移动到第二通信系统的第一承载时，具体用于：
    根据所述接入与移动性管理功能网元与所述第二通信系统的移动性管理实体之间存在接口、运营商策略、单网络切片选择辅助信息、数据网络名称以及所述第一服务 质量流对应的策略与计费控制规则中的至少一个，确定所述第一服务质量流需要移动到所述第二通信系统的第一承载。
  26. 一种通信装置，其特征在于，包括：
    接收单元，用于在创建终端设备在第一通信系统中的第一服务质量流的过程中，接收所述第一服务质量流的优先级；
    建立单元，用于建立所述第一服务质量流的优先级与所述第一服务质量流在第二通信系统中对应的承载的标识的对应关系；
    其中，所述承载的标识对应有N个服务质量流，N为大于或等于2的正整数，所述N个服务质量流包括所述第一服务质量流。
  27. 根据权利要求26所述的装置，其特征在于，
    所述接收单元，还用于接收所述第二服务质量流的优先级；
    所述装置还包括确定单元；
    所述确定单元，用于当确定为所述终端设备在所述第二通信系统中分配的承载标识总数超过设定阈值时，根据所述第二服务质量流的优先级以及所述N个服务质量流中的最大优先级，确定是否建立所述第二服务质量流的优先级与所述承载的标识的对应关系。
  28. 根据权利要求27所述的装置，其特征在于，
    所述确定单元，还用于确定需要释放所述第一服务质量流；
    所述装置还包括解除单元；
    所述解除单元，用于解除所述第一服务质量流的优先级与所述第一服务质量流在第二通信系统中对应的承载的标识的对应关系。
  29. 一种通信装置，其特征在于，包括：
    接收单元，用于接收来自接入与移动性管理功能网元的请求消息，所述请求消息包括被请求回收的承载的标识以及所述承载的标识对应的优先级；
    确定单元，用于确定所述承载的标识对应的优先级小于或等于N个服务质量流的优先级的最大优先级，其中，所述N个服务质量流均对应于所述承载的标识，N为大于或等于2的正整数；
    发送单元，用于向所述接入与移动性管理功能网元发送响应消息，所述响应消息包括指示信息，所述指示信息用于拒绝回收所述承载的标识。
  30. 根据权利要求29所述的装置，其特征在于，所述响应消息还包括所述N个服务质量流的优先级的最大优先级，所述最大优先级用于所述接入与移动性管理功能网元将所述第一承载的标识对应的优先级记录为所述最大优先级。
  31. 一种通信装置，其特征在于，所述通信装置用于执行如权利要求1至10中任一项所述的方法。
  32. 一种通信装置，其特征在于，所述通信装置用于执行如权利要求11至13中任一项所述的方法。
  33. 一种通信装置，其特征在于，所述通信装置用于执行如权利要求14至15中任一项所述的方法。
  34. 一种通信装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得所述通信装置执行如权利要求1至10中任一项所述的方法。
  35. 一种通信装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得所述通信装置执行如权利要求11至13中任一项所述的方法。
  36. 一种通信装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得所述通信装置执行如权利要求14至15中任一项所述的方法。
  37. 一种通信系统，其特征在于，包括如权利要求31中所述的装置，和/或，如权利要求32中所述的装置，和/或，如权利要求33中所述的装置。
  38. 一种芯片系统，其特征在于，包括：处理单元和与所述处理单元耦合的通信单元，所述处理单元用于运行计算机程序或指令，以使得处理单元执行如权利要求1-15中任意一项所述的方法。
  39. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序或指令，当所述计算机程序或指令被通信装置执行时，实现如权利要求1至15中任一项所述的方法。
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