WO2020249032A1 - Procédé et dispositif de communication - Google Patents

Procédé et dispositif de communication Download PDF

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Publication number
WO2020249032A1
WO2020249032A1 PCT/CN2020/095480 CN2020095480W WO2020249032A1 WO 2020249032 A1 WO2020249032 A1 WO 2020249032A1 CN 2020095480 W CN2020095480 W CN 2020095480W WO 2020249032 A1 WO2020249032 A1 WO 2020249032A1
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WIPO (PCT)
Prior art keywords
network element
user plane
candidate
interface
plane network
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PCT/CN2020/095480
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English (en)
Chinese (zh)
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宗在峰
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华为技术有限公司
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Publication of WO2020249032A1 publication Critical patent/WO2020249032A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link

Definitions

  • This application relates to the field of communication, and in particular to a communication method and device.
  • the session management function (SMF) network element is not considered in the process of selecting the user plane function (UPF) network element Whether there is an N9 interface between the selected UPF network elements, or the access and mobility management function (AMF) network element in the process of selecting SMF network elements, does not consider the selected SMF network element control Whether there is an N9 interface between UPF network elements, which causes the establishment of a session connection between the radio access network (RAN) that the terminal device accesses and the data network (DN) that the terminal device accesses fails .
  • RAN radio access network
  • DN data network
  • the embodiments of the present application provide a communication method and device, which can improve the reliability and efficiency of network element selection.
  • a communication method includes: the session management network element obtains first control information and second control information.
  • the first control information includes first interface information of at least one candidate intermediate user plane network element
  • the second control information includes first interface information of at least one candidate anchor user plane network element.
  • the session management network element determines that there is a first interface between the first candidate intermediate user plane network element and the first candidate anchor user plane network element according to the first control information and the second control information.
  • the first candidate intermediate user plane network element is a user plane network element among at least one candidate intermediate user plane network element
  • the first candidate anchor user plane network element is a user plane network among at least one candidate anchor user plane network element yuan.
  • the session management network element selects the first candidate intermediate user plane network element and the first candidate anchor user plane network element as the target user plane network element.
  • the session management network element first determines at least one candidate intermediate user plane network based on the first interface information of at least one candidate intermediate user plane network element and the first interface information of at least one candidate anchor user plane network element There is a first interface between the first candidate intermediate user plane network element in the element and the first candidate anchor user plane network element among the at least one candidate anchor user plane network element, and then the first candidate intermediate user plane network element is selected.
  • the user plane network element with the first candidate anchor point is used as the target user plane network element, which can avoid the failure to establish a normal session connection because there is no first interface between two or more user plane network elements selected by the session management network element
  • the signaling waste, resource waste, and time waste caused by multiple interactions to select a suitable target user plane network element can be reduced, and the reliability and efficiency of the session management network element in selecting the user plane network element can be improved.
  • the first control information includes: at least one candidate intermediate user plane network element's first interface reachable user plane network element Internet protocol address set; the second control information includes: at least one candidate anchor Click the Internet Protocol address of the first interface of the user plane network element.
  • the session management network element determines that there is a first interface between the first candidate intermediate user plane network element and the first candidate anchor user plane network element according to the first control information and the second control information, which may include: session management network The element determines that the internet protocol address of the first interface of the first candidate anchor user plane network element exists in the set of internet protocol addresses of the user plane network elements reachable by the first interface of the first candidate intermediate user plane network element.
  • the first control information includes: the Internet Protocol address of the first interface of at least one candidate intermediate user plane network element; the second control information includes: the first interface of at least one candidate anchor user plane network element A collection of Internet Protocol addresses of user plane network elements whose interfaces are reachable.
  • the session management network element determines that there is a first interface between the first candidate intermediate user plane network element and the first candidate anchor user plane network element according to the first control information and the second control information, which may include: session management network The element determines that the internet protocol address of the first interface of the first candidate intermediate user plane network element exists in the set of internet protocol addresses of the user plane network elements reachable by the first interface of the first candidate anchor user plane network element.
  • the first control information may include: at least one candidate intermediate user plane network element's first interface accessible data center identification set; the second control information may include: at least one candidate anchor user The ID of the data center where the plane network element is located.
  • the session management network element determines that there is a first interface between the first candidate intermediate user plane network element and the first candidate anchor user plane network element according to the first control information and the second control information, which may include: session management network The element determines that there is an identifier of the data center where the first candidate anchor point user plane network element is located in the identification set of the data center that is reachable by the first interface of the first candidate intermediate user plane network element.
  • the first control information may include: the identification of the data center where at least one candidate intermediate user plane network element is located; the second control information may include: the information of at least one candidate anchor user plane network element The set of identities of the data centers reachable by the first interface.
  • the session management network element determines that there is a first interface between the first candidate intermediate user plane network element and the first candidate anchor user plane network element according to the first control information and the second control information, which may include: session management network The element determines that the identifier of the data center where the first candidate intermediate user plane network element is located exists in the set of identifiers of the data center that is reachable by the first interface of the first candidate anchor user plane network element.
  • the first control information may include: at least one candidate intermediate user plane network element's first interface accessible user plane network element identification set; the second control information may include: at least one candidate anchor Click the ID of the user plane network element.
  • the session management network element determines that there is a first interface between the first candidate intermediate user plane network element and the first candidate anchor user plane network element according to the first control information and the second control information, which may include: session management network The element determines that the identifier of the first candidate anchor user plane network element exists in the identifier set of the user plane network element accessible by the first interface of the first candidate intermediate user plane network element.
  • the first control information may include: the identification of at least one candidate intermediate user plane network element; the second control information may include: the first interface of at least one candidate anchor user plane network element is reachable The identity collection of the user plane network element.
  • the session management network element determines that there is a first interface between the first candidate intermediate user plane network element and the first candidate anchor user plane network element according to the first control information and the second control information, which may include: session management network The element determines that the identifier of the first candidate intermediate user plane network element exists in the identification set of the user plane network element accessible by the first interface of the first candidate anchor user plane network element.
  • the first control information may include: at least one candidate intermediate user plane network element's first interface accessible user plane network element position set; the second control information may include: at least one candidate anchor Click the location of the user plane network element.
  • the session management network element determines that there is a first interface between the first candidate intermediate user plane network element and the first candidate anchor user plane network element according to the first control information and the second control information, which may include: session management network The element determines the position of the candidate first anchor user plane network element in the set of user plane network elements reachable by the first interface of the first candidate intermediate user plane network element.
  • the first control information may include: the location of at least one candidate intermediate user plane network element; the second control information may include: the first interface of at least one candidate anchor user plane network element is reachable The location collection of user plane network elements.
  • the session management network element determines that there is a first interface between the first candidate intermediate user plane network element and the first candidate anchor user plane network element according to the first control information and the second control information, which may include: session management network The element determines the position of the first candidate intermediate user plane network element in the set of positions of the user plane network element reachable by the first interface of the first candidate anchor user plane network element.
  • obtaining the first control information and the second control information by the session management network element may include: the session management network element obtains the first control from at least one candidate intermediate user plane network element or network storage network element Information; the session management network element obtains second control information from at least one candidate anchor user plane network element or network storage network element.
  • the at least one candidate intermediate user plane network element may be: a user plane network element that has a second interface with the access network network element accessed by the terminal device; the at least one candidate anchor user plane network element may be: There is a user plane network element of the third interface with the data network to be accessed by the terminal device.
  • the second aspect is a communication method.
  • the communication method includes: accessing a management network element to obtain third control information and fourth control information.
  • the third control information includes the first interface information of the user plane network element controlled by at least one candidate intermediate session management network element
  • the fourth control information includes the first interface information of the user plane network element controlled by at least one candidate anchor session management network element. Interface information.
  • the access management network element determines, according to the third control information and the fourth control information, the user plane network element controlled by the first candidate intermediate session management network element and the user plane network element controlled by the first candidate anchor session management network element. There is a first interface between.
  • the first candidate intermediate session management network element is a session management network element among at least one candidate intermediate session management network element
  • the first candidate anchor point session management network element is a session management network element among at least one candidate anchor point session management network element yuan.
  • the access management network element firstly according to the first interface information of the user plane network element controlled by the first candidate intermediate session management network element among the at least one candidate intermediate session management network element and the at least one candidate anchor session
  • the first interface information of the user plane network element controlled by the first candidate anchor session management network element in the management network element, and the user plane network element controlled by the first candidate intermediate session management network element and the first candidate intermediate session management network element are determined
  • the first interface exists between the controlled user plane network elements, and then the first candidate intermediate session management network element and the first candidate anchor session management network element are selected as the target session management network element, which can avoid the selection of the access management network element
  • the third control information may include: at least one candidate intermediate session management network element controlled user plane network element's first interface accessible user plane network element Internet protocol address set; fourth control The information may include: the internet protocol address of the first interface of the user plane network element controlled by the at least one candidate anchor session management network element.
  • the access management network element determines the user plane network element controlled by the first candidate intermediate session management network element and the user plane network element controlled by the first candidate anchor session management network element according to the third control information and the fourth control information
  • the presence of the first interface may include: the access management network element determines that the first candidate intermediate session management network element controls the user plane network element and the first interface of the user plane network element is reachable.
  • the third control information may include: the internet protocol address of the first interface of the user plane network element controlled by at least one candidate intermediate session management network element; the fourth control information may include: at least one candidate The set of internet protocol addresses of the user plane network elements reachable by the first interface of the user plane network element controlled by the anchor session management network element.
  • the access management network element determines the user plane network element controlled by the first candidate intermediate session management network element and the user plane network element controlled by the first candidate anchor session management network element according to the third control information and the fourth control information
  • the presence of the first interface may include: the access management network element determines that the first candidate anchor point session management network element controls the user plane network element. The first interface of the user plane network element is reachable.
  • the third control information may include: at least one candidate intermediate session management network element controlled by the user plane network element of the first interface of the data center accessible data center; the fourth control information may include: The identifier of the data center where the user plane network element controlled by the at least one candidate anchor session management network element is located.
  • the access management network element determines the user plane network element controlled by the first candidate intermediate session management network element and the user plane network element controlled by the first candidate anchor session management network element according to the third control information and the fourth control information
  • the presence of the first interface may include: the access management network element determines that the first candidate anchor session exists in the identification set of the data center to which the first interface of the user plane network element controlled by the first candidate intermediate session management network element is reachable.
  • the third control information may include: the identifier of the data center where the user plane network element controlled by at least one candidate intermediate session management network element is located; the fourth control information may include: at least one candidate anchor A set of identities of the data centers that are reachable by the first interface of the user plane network element controlled by the session management network element.
  • the access management network element determines the user plane network element controlled by the first candidate intermediate session management network element and the user plane network element controlled by the first candidate anchor session management network element according to the third control information and the fourth control information
  • the presence of the first interface may include: the access management network element determines that the first candidate anchor point session management network element controls the user plane network element and the first interface of the user plane network element is reachable.
  • the first candidate intermediate session exists in the identification set of the data center that is reachable
  • the third control information may include: at least one candidate intermediate session management network element controlled by the user plane network element of the first interface accessible user plane network element identification set; the fourth control information may Including: the identifier of the user plane network element controlled by at least one candidate anchor session management network element.
  • the access management network element determines the user plane network element controlled by the first candidate intermediate session management network element and the user plane network element controlled by the first candidate anchor session management network element according to the third control information and the fourth control information
  • the existence of the first interface may include: the access management network element determines that the first candidate anchor exists in the identification set of the user plane network element that is reachable by the first interface of the user plane network element controlled by the first candidate intermediate session management network element Click the ID of the user plane network element controlled by the session management network element.
  • the third control information may include: the identification of the user plane network element controlled by at least one candidate intermediate session management network element; the fourth control information may include: at least one candidate anchor session management network element A set of identities of the user plane network elements reachable by the first interface of the controlled user plane network element.
  • the access management network element determines the user plane network element controlled by the first candidate intermediate session management network element and the user plane network element controlled by the first candidate anchor session management network element according to the third control information and the fourth control information
  • the presence of a first interface may include: the access management network element determines that the first candidate anchor point, the session management network element controls the user plane network element, and the first interface of the user plane network element is reachable.
  • the identifier of the user plane network element controlled by the intermediate session management network element may include: the identification of the user plane network element controlled by at least one candidate intermediate session management network element; the fourth control information may include: at least one candidate anchor session management network element A set of identities of the user plane network elements reachable by the first interface of the controlled user plane network element.
  • the third control information may include: a set of positions of user plane network elements reachable by the first interface of the user plane network element controlled by at least one candidate intermediate session management network element; the fourth control information may Including: the position of the user plane network element controlled by at least one candidate anchor point session management network element.
  • the access management network element determines the user plane network element controlled by the first candidate intermediate session management network element and the user plane network element controlled by the first candidate anchor session management network element according to the third control information and the fourth control information
  • the existence of the first interface may include: the access management network element determines that the first candidate anchor is present in the location set of the user plane network element that is reachable by the first interface of the user plane network element controlled by the first candidate intermediate session management network element Click the location of the user plane network element controlled by the session management network element.
  • the third control information may include: the location of the user plane network element controlled by at least one candidate intermediate session management network element; the fourth control information may include: at least one candidate anchor session management network element The location set of the user plane network elements reachable by the first interface of the controlled user plane network element.
  • the access management network element determines the user plane network element controlled by the first candidate intermediate session management network element and the user plane network element controlled by the first candidate anchor session management network element according to the third control information and the fourth control information
  • the presence of the first interface may include: the access management network element determines that the first candidate anchor point, the session management network element controls the user plane network element, and the first interface of the user plane network element is reachable. The location of the user plane network element controlled by the intermediate session management network element.
  • obtaining the third control information and the fourth control information by the access management network element may include: the access management network element obtains the second control information from the network storage network element or at least one candidate intermediate session management network element.
  • the at least one candidate intermediate session management network element may be: among the controlled user plane network elements, there is a session management network element in which there is a user plane network element with a second interface between the access network network element accessed by the terminal device and the user plane network element.
  • the at least one candidate anchor session management network element may be: among the controlled user plane network elements, there is a session management network element of a user plane network element that has a third interface between the data network to be accessed by the terminal device.
  • a communication method includes: the network storage network element receives and saves first interface information of at least one user plane network element.
  • the first interface information includes an identifier of a user plane network element that is reachable by the user plane network element among at least one user plane network element.
  • the network storage network element receives the first request.
  • the first request is used to obtain first interface information of candidate user plane network elements among at least one user plane network element, or, the first request is used to request selection of candidate user plane network elements from at least one user plane network element, Alternatively, the first request is used to request that a candidate session management network element be selected according to the first interface information of at least one user plane network element.
  • the network storage network element sends the first response.
  • the first response carries the first interface information of the candidate user plane network element among at least one user plane network element, or the identifier of the candidate user plane network element, or the identifier of the candidate session management network element.
  • the network storage network element can receive and uniformly manage the first interface information of at least one user plane network element, and when the network storage network element receives the information used to select the user plane network element sent by the session management network element At the first request, the network storage network element may send a first response carrying the first interface information of the candidate user plane network element or the identifier of the candidate user plane network element to the session management network element, so that the session management network element can quickly select the target user Or, when the network storage network element receives the first request for selecting the session management network element sent by the access management network element, the network storage network element may send to the access management network element the candidate session management The first response of the first interface information of the user plane network element controlled by the network element or the identification of the user plane network element controlled by the candidate session management network element, so that the access management network element can quickly select the target session management network element, which can avoid session management There is no first interface between two or more user plane network elements in Xuzhou, and/or access to the user plane network element controlled by two
  • the foregoing network storage network element receiving and storing the first interface information of at least one user plane network element may include at least one of the following: the network storage network element receiving and storing at least one user plane network element sending The network storage network element receives and saves the first interface information of at least one user plane network element sent by the operation management and maintenance equipment; the network storage network element receives and saves at least one session management sent by at least one session management network element The first interface information of the user plane network element controlled by the network element.
  • the candidate user plane network elements may include candidate intermediate user plane network elements.
  • the first request carries network information of the network element of the access network accessed by the terminal device.
  • the first response carries the first interface information of the candidate intermediate user plane network element.
  • the candidate user plane network element includes a candidate anchor user plane function anchor user plane network element.
  • the first request carries network information of the data network to be accessed by the terminal device.
  • the first response carries the first interface information of the candidate anchor user plane network element.
  • the candidate user plane network elements may include candidate intermediate user plane function intermediate user plane network elements and candidate anchor point user plane function anchor user plane network elements, and the candidate intermediate user plane network element is the access to the terminal device.
  • the first request carries the first interface information of the candidate intermediate user plane network element, and the first interface information of the candidate intermediate user plane network element is used to select the candidate from at least one user plane network element.
  • the intermediate user plane network element has the user plane network element of the first interface as the candidate anchor user plane network element.
  • the first response carries the identifier of the candidate anchor user plane network element.
  • the candidate user plane network elements may include candidate intermediate user plane function intermediate user plane network elements and candidate anchor user plane function anchor user plane network elements, where the candidate anchor user plane network element is data to be accessed by the terminal device There are user plane network elements of the third interface between the networks.
  • the first request carries the first interface information of the candidate anchor user plane network element, and the first interface information of the candidate anchor user plane network element is used to obtain information from at least one user plane network element.
  • the user plane network element that has the first interface with the candidate anchor user plane network element is selected as the candidate intermediate user plane network element.
  • the first response carries the identifier of the candidate intermediate user plane network element.
  • the candidate user plane network elements may include candidate intermediate user plane function intermediate user plane network elements and candidate anchor user plane function anchor user plane network elements.
  • the first request carries network information of the network element of the access network accessed by the terminal device and network information of the data network to be accessed by the terminal device.
  • the first response carries the first interface information of the candidate intermediate user plane network element and the first interface information of the candidate anchor user plane network element.
  • the candidate intermediate user plane network element is a user plane network element with a second interface between the access network network element to which the terminal device is connected, and the candidate anchor user plane network element is between the data network to be accessed by the terminal device There is a user plane network element of the third interface.
  • the candidate session management network element may include a candidate intermediate session management network element.
  • the first request carries network information of the network element of the access network accessed by the terminal device.
  • the first response carries the first interface information of the user plane network element controlled by the candidate intermediate session management network element.
  • the candidate session management network element may include a candidate anchor session management function anchor session management network element.
  • the first request carries network information of the data network to be accessed by the terminal device.
  • the first response carries the first interface information of the user plane network element controlled by the candidate anchor session management network element.
  • the candidate session management network element may include a candidate intermediate session management network element and a candidate anchor point session management function anchor point session management network element, and the user plane network element controlled by the candidate intermediate session management network element has access to the terminal device There is a user plane network element of the second interface between the access network network elements.
  • the first request carries the first interface information of the user plane network element controlled by the candidate intermediate session management network element, and the first interface information of the user plane network element controlled by the candidate intermediate session management network element is used for To select a first user plane network element that has a first interface with a user plane network element controlled by the candidate intermediate session management network element from at least one user plane network element, and from the session management network elements that control the first user plane network element Select candidate anchor session management network elements.
  • the first response carries the identifier of the candidate anchor session management network element.
  • the candidate session management network element may include a candidate intermediate user plane function intermediate session management network element and a candidate anchor session management function anchor session management network element, and there are user plane network elements controlled by the candidate anchor session management network element There is a user plane network element of the third interface with the data network to be accessed by the terminal device.
  • the first request carries the first interface information of the user plane network element controlled by the candidate anchor session management network element, and the first request of the user plane network element controlled by the candidate anchor session management network element
  • the interface information is used to select, from at least one user plane network element, a second user plane network element with a first interface between the user plane network element controlled by the candidate anchor session management network element, and to control the second user plane network element Select candidate intermediate session management network elements from among the session management network elements.
  • the first response carries the first interface information of the user plane network element controlled by the candidate intermediate session management network element.
  • the candidate session management network element may include a candidate intermediate user plane function intermediate session management network element and a candidate anchor user plane function anchor session management network element.
  • the first request carries network information of the network element of the access network accessed by the terminal device and network information of the data network to be accessed by the terminal device.
  • the first response carries the first interface information of the user plane network element controlled by the candidate intermediate session management network element and the first interface information of the user plane network element controlled by the candidate anchor session management network element.
  • the user plane network elements controlled by the candidate intermediate session management network element there is a user plane network element that has a second interface with the access network network element accessed by the terminal device, and the user plane network element controlled by the candidate anchor session management network element There is a user plane network element with a third interface between the network element and the data network to be accessed by the terminal device.
  • a first interface exists between the user plane network element controlled by the candidate intermediate session management network element and the user plane network element controlled by the candidate anchor session management network element.
  • a communication device in a fourth aspect, includes: a processing module and a transceiver module. Among them, the transceiver module is used to obtain the first control information and the second control information.
  • the first control information includes first interface information of at least one candidate intermediate user plane network element
  • the second control information includes first interface information of at least one candidate anchor user plane network element.
  • the processing module is configured to determine, according to the first control information and the second control information, that a first interface exists between the first candidate intermediate user plane network element and the first candidate anchor user plane network element.
  • the first candidate intermediate user plane network element is a user plane network element among at least one candidate intermediate user plane network element
  • the first candidate anchor user plane network element is a user plane network among at least one candidate anchor user plane network element yuan.
  • the processing module is further configured to select the first candidate intermediate user plane network element and the first candidate anchor user plane network element as the target user plane network element.
  • the first control information includes: at least one candidate intermediate user plane network element's first interface accessible user plane network element Internet protocol address set; the second control information includes: at least one candidate anchor point The Internet Protocol address of the first interface of the user plane network element.
  • the processing module is further configured to determine that in the Internet Protocol address set of the user plane network element whose first interface of the first candidate intermediate user plane network element is reachable, there is the first interface of the first candidate anchor user plane network element Internet Protocol address.
  • the first control information includes: the Internet Protocol address of the first interface of at least one candidate intermediate user plane network element; the second control information includes: the first interface of at least one candidate anchor user plane network element A collection of Internet Protocol addresses of user plane network elements whose interfaces are reachable.
  • the processing module is further configured to determine that in the Internet Protocol address set of the user plane network element that is reachable by the first interface of the first candidate anchor user plane network element, there is the first interface of the first candidate intermediate user plane network element Internet Protocol address.
  • the first control information may include: at least one candidate intermediate user plane network element's first interface accessible data center identification set; the second control information may include: at least one candidate anchor user plane The ID of the data center where the network element is located.
  • the processing module is further configured to determine that there is an identifier of the data center where the first candidate anchor user plane network element is located in the identification set of the data center accessible by the first interface of the first candidate intermediate user plane network element.
  • the first control information may include: the identification of the data center where at least one candidate intermediate user plane network element is located; the second control information may include: the first control information of at least one candidate anchor user plane network element A collection of identities of data centers accessible by an interface.
  • the processing module is further configured to determine that there is an identifier of the data center where the first candidate intermediate user plane network element is located in the set of identifiers of the data center accessible by the first interface of the first candidate anchor user plane network element.
  • the first control information may include: at least one candidate intermediate user plane network element's first interface accessible user plane network element identification set; the second control information may include: at least one candidate anchor point ID of the user plane network element.
  • the processing module is further configured to determine that there is an identifier of the first candidate anchor user plane network element in the identification set of the user plane network element that is reachable by the first interface of the first candidate intermediate user plane network element.
  • the first control information may include: the identification of at least one candidate intermediate user plane network element; the second control information may include: the first interface of at least one candidate anchor user plane network element is reachable The ID set of the user plane network element.
  • the processing module is further configured to determine that there is an identifier of the first candidate intermediate user plane network element in the identification set of the user plane network element accessible by the first interface of the first candidate anchor user plane network element.
  • the first control information may include: at least one candidate intermediate user plane network element's first interface accessible user plane network element position set; the second control information may include: at least one candidate anchor point The location of the user plane network element.
  • the processing module is further configured to determine the position of the candidate first anchor user plane network element in the set of positions of the user plane network element reachable by the first interface of the first candidate intermediate user plane network element.
  • the first control information may include: the location of at least one candidate intermediate user plane network element; the second control information may include: the first interface of at least one candidate anchor user plane network element is reachable The location collection of user plane network elements.
  • the processing module is further configured to determine the position of the first candidate intermediate user plane network element in the set of user plane network elements reachable by the first interface of the first candidate anchor user plane network element.
  • the transceiver module is further configured to obtain first control information from at least one candidate intermediate user plane network element or network storage network element, and from at least one candidate anchor user plane network element or network storage network element Obtain the second control information.
  • the at least one candidate intermediate user plane network element may be: a user plane network element that has a second interface with the access network network element accessed by the terminal device; the at least one candidate anchor user plane network element may be: There is a user plane network element of the third interface with the data network to be accessed by the terminal device.
  • a communication device in a fifth aspect, includes: a processing module and a transceiver module. Among them, the transceiver module is used to obtain third control information and fourth control information.
  • the third control information includes the first interface information of the user plane network element controlled by at least one candidate intermediate session management network element
  • the fourth control information includes the first interface information of the user plane network element controlled by at least one candidate anchor session management network element.
  • Interface information The processing module is used to determine the existence between the user plane network element controlled by the first candidate intermediate session management network element and the user plane network element controlled by the first candidate anchor session management network element according to the third control information and the fourth control information The first interface.
  • the first candidate intermediate session management network element is a session management network element among at least one candidate intermediate session management network element
  • the first candidate anchor point session management network element is a session management network element among at least one candidate anchor point session management network element yuan.
  • the processing module is further configured to select the first candidate intermediate session management network element and the first candidate anchor session management network element as the target session management network element.
  • the third control information may include: at least one candidate intermediate session management network element controlled by the user plane network element of the first interface reachable user plane network element Internet protocol address set; fourth control information It may include: the internet protocol address of the first interface of the user plane network element controlled by at least one candidate anchor session management network element.
  • the processing module is further configured to determine that the first candidate anchor point session management exists in the Internet protocol address set of the user plane network element that is reachable by the first interface of the user plane network element controlled by the first candidate intermediate session management network element The Internet Protocol address of the first interface of the user plane network element controlled by the network element.
  • the third control information may include: the Internet Protocol address of the first interface of the user plane network element controlled by at least one candidate intermediate session management network element; the fourth control information may include: at least one candidate anchor A set of Internet Protocol addresses of the user plane network elements reachable by the first interface of the user plane network element controlled by the session management network element.
  • the processing module is further configured to determine that the first candidate intermediate session management candidate exists in the Internet protocol address set of the user plane network element whose first interface is reachable by the user plane network element controlled by the first candidate anchor session management network element The Internet Protocol address of the first interface of the user plane network element controlled by the network element.
  • the third control information may include: at least one candidate intermediate session management network element controlled user plane network element's first interface of the data center reachable data center identification set; the fourth control information may include: at least The identifier of the data center where the user plane network element controlled by a candidate anchor session management network element is located.
  • the processing module is further configured to determine that a user controlled by the first candidate anchor session management network element exists in the identification set of the data center to which the first interface of the user plane network element controlled by the first candidate intermediate session management network element is reachable The ID of the data center where the plane network element is located.
  • the third control information may include: the identifier of the data center where the user plane network element controlled by at least one candidate intermediate session management network element is located; the fourth control information may include: at least one candidate anchor point A set of identities of the data center to which the first interface of the user plane network element controlled by the session management network element is reachable.
  • the processing module is further configured to determine that a user controlled by the first candidate intermediate session management network element exists in the identification set of the data center to which the first interface of the user plane network element controlled by the first candidate anchor session management network element is reachable The ID of the data center where the plane network element is located.
  • the third control information may include: at least one candidate intermediate session management network element controlled by the user plane network element's first interface accessible user plane network element identification set; the fourth control information may include : The identifier of the user plane network element controlled by at least one candidate anchor session management network element.
  • the processing module is further configured to determine that the first candidate anchor session management network element is controlled by the first candidate anchor session management network element in the identification set of the user plane network element that is reachable by the first interface of the user plane network element controlled by the first candidate intermediate session management network element The ID of the user plane network element.
  • the third control information may include: the identification of the user plane network element controlled by at least one candidate intermediate session management network element; the fourth control information may include: at least one candidate anchor session management network element control A set of identities of the user plane network elements reachable by the first interface of the user plane network element.
  • the processing module is further configured to determine that there is a first candidate intermediate session management network element control in the identification set of the user plane network element accessible by the first interface of the user plane network element controlled by the first candidate anchor session management network element The ID of the user plane network element.
  • the third control information may include: at least one candidate intermediate session management network element controlled user plane network element control of the first interface of the user plane network element reachable user plane network element position set; the fourth control information may include : The position of the user plane network element controlled by at least one candidate anchor session management network element.
  • the processing module is further configured to determine that the first candidate anchor point session management network element is controlled by the first candidate anchor point session management network element in the location set of the user plane network element that is reachable by the first interface of the user plane network element controlled by the first candidate intermediate session management network element The location of the user plane network element.
  • the third control information may include: the position of the user plane network element controlled by at least one candidate intermediate session management network element; the fourth control information may include: at least one candidate anchor session management network element control The location collection of user plane network elements reachable by the first interface of the user plane network element.
  • the processing module is further configured to determine that there is a first candidate intermediate session management network element control in the position set of the user plane network element accessible by the first interface of the user plane network element controlled by the first candidate anchor session management network element The location of the user plane network element.
  • the transceiver module is also used to obtain third control information from the network storage network element or at least one candidate intermediate session management network element, and from the network storage network element or at least one candidate anchor session management network element Obtain the fourth control information.
  • the at least one candidate intermediate session management network element may be: among the controlled user plane network elements, there is a session management network element in which there is a user plane network element with a second interface between the access network network element accessed by the terminal device and the user plane network element.
  • the at least one candidate anchor session management network element may be: among the controlled user plane network elements, there is a session management network element of a user plane network element that has a third interface between the data network to be accessed by the terminal device.
  • a communication device in a sixth aspect, includes: a processing module and a transceiver module.
  • the transceiver module is configured to receive first interface information of at least one user plane network element.
  • the first interface information includes an identifier of a user plane network element that is reachable by the user plane network element among at least one user plane network element.
  • the processing module is used to save the first interface information received by the transceiver module.
  • the transceiver module is also used to receive the first request.
  • the first request is used to obtain first interface information of candidate user plane network elements among at least one user plane network element, or, the first request is used to request selection of candidate user plane network elements from at least one user plane network element, Alternatively, the first request is used to request that a candidate session management network element be selected according to the first interface information of at least one user plane network element.
  • the transceiver module is also used to send the first response.
  • the first response carries the first interface information of the candidate user plane network element among at least one user plane network element, or the identifier of the candidate user plane network element, or the identifier of the candidate session management network element.
  • the foregoing transceiver module is further configured to receive first interface information sent by at least one user plane network element.
  • the transceiver module is further configured to receive first interface information of at least one user plane network element sent by the operation, management and maintenance equipment.
  • the transceiver module is further configured to receive first interface information of a user plane network element controlled by at least one session management network element sent by at least one session management network element.
  • the candidate user plane network elements may include candidate intermediate user plane network elements.
  • the first request carries network information of the network element of the access network accessed by the terminal device.
  • the first response carries the first interface information of the candidate intermediate user plane network element.
  • the candidate user plane network element includes a candidate anchor user plane function anchor user plane network element.
  • the first request carries network information of the data network to be accessed by the terminal device.
  • the first response carries the first interface information of the candidate anchor user plane network element.
  • the candidate user plane network elements may include candidate intermediate user plane function intermediate user plane network elements and candidate anchor point user plane function anchor user plane network elements, and the candidate intermediate user plane network element is the access to the terminal device.
  • the first request carries the first interface information of the candidate intermediate user plane network element, and the first interface information of the candidate intermediate user plane network element is used to select the candidate intermediate user plane network element from at least one user plane network element.
  • the user plane network element has the user plane network element of the first interface as the candidate anchor user plane network element.
  • the first response carries the identifier of the candidate anchor user plane network element.
  • the candidate user plane network elements may include candidate intermediate user plane function intermediate user plane network elements and candidate anchor user plane function anchor user plane network elements, where the candidate anchor user plane network element is data to be accessed by the terminal device There are user plane network elements of the third interface between the networks.
  • the first request carries the first interface information of the candidate anchor user plane network element, and the first interface information of the candidate anchor user plane network element is used to select from at least one user plane network element The user plane network element with the first interface with the candidate anchor user plane network element is used as the candidate intermediate user plane network element.
  • the first response carries the identifier of the candidate intermediate user plane network element.
  • the candidate user plane network elements may include candidate intermediate user plane function intermediate user plane network elements and candidate anchor user plane function anchor user plane network elements.
  • the first request carries network information of the network element of the access network accessed by the terminal device and network information of the data network to be accessed by the terminal device.
  • the first response carries the first interface information of the candidate intermediate user plane network element and the first interface information of the candidate anchor user plane network element.
  • the candidate intermediate user plane network element is a user plane network element with a second interface between the access network network element to which the terminal device is connected, and the candidate anchor user plane network element is between the data network to be accessed by the terminal device There is a user plane network element of the third interface.
  • the candidate session management network element may include a candidate intermediate session management network element.
  • the first request carries network information of the network element of the access network accessed by the terminal device.
  • the first response carries the first interface information of the user plane network element controlled by the candidate intermediate session management network element.
  • the candidate session management network element may include a candidate anchor session management function anchor session management network element.
  • the first request carries network information of the data network to be accessed by the terminal device.
  • the first response carries the first interface information of the user plane network element controlled by the candidate anchor session management network element.
  • the candidate session management network element may include a candidate intermediate session management network element and a candidate anchor point session management function anchor point session management network element, and the user plane network element controlled by the candidate intermediate session management network element has access to the terminal device There is a user plane network element of the second interface between the access network network elements.
  • the first request carries the first interface information of the user plane network element controlled by the candidate intermediate session management network element, and the first interface information of the user plane network element controlled by the candidate intermediate session management network element is used for Select from at least one user plane network element the first user plane network element that has the first interface with the user plane network element controlled by the candidate intermediate session management network element, and select from the session management network elements that control the first user plane network element Candidate anchor session management network element.
  • the first response carries the identifier of the candidate anchor session management network element.
  • the candidate session management network element may include a candidate intermediate user plane function intermediate session management network element and a candidate anchor session management function anchor session management network element, and there are user plane network elements controlled by the candidate anchor session management network element There is a user plane network element of the third interface with the data network to be accessed by the terminal device.
  • the first request carries the first interface information of the user plane network element controlled by the candidate anchor session management network element, and the first interface of the user plane network element controlled by the candidate anchor session management network element
  • the information is used to select, from at least one user plane network element, a second user plane network element with a first interface between the user plane network element controlled by the candidate anchor session management network element, and from the control of the second user plane network element Select candidate intermediate session management network elements from the session management network elements.
  • the first response carries the first interface information of the user plane network element controlled by the candidate intermediate session management network element.
  • the candidate session management network element may include a candidate intermediate user plane function intermediate session management network element and a candidate anchor user plane function anchor session management network element.
  • the first request carries network information of the network element of the access network accessed by the terminal device and network information of the data network to be accessed by the terminal device.
  • the first response carries the first interface information of the user plane network element controlled by the candidate intermediate session management network element and the first interface information of the user plane network element controlled by the candidate anchor session management network element.
  • the user plane network elements controlled by the candidate intermediate session management network element there is a user plane network element that has a second interface with the access network network element accessed by the terminal device, and the user plane network element controlled by the candidate anchor session management network element There is a user plane network element with a third interface between the network element and the data network to be accessed by the terminal device.
  • a first interface exists between the user plane network element controlled by the candidate intermediate session management network element and the user plane network element controlled by the candidate anchor session management network element.
  • a communication device including: a processor; the processor is coupled to a memory and obtains computer instructions from the memory, and when the processor executes the computer instructions, the communication device is caused to execute any of the foregoing The communication method described in any implementation manner in the aspect.
  • the communication device may be the session management network element described in the first aspect or a chip or chip system set in the session management network element; or, the communication device may be the access management network element described in the second aspect. Or the chip or chip system set in the access management network element; or, the communication device may be the network storage network element described in the third aspect or the chip or chip system set in the network storage network element.
  • a communication system in an eighth aspect, includes multiple user plane network elements, one or more session management network elements, access management network elements, and network storage network elements.
  • the session management network element may be used to implement the communication method described in the first aspect or any one of the possible implementations of the first aspect;
  • the access management network element may be used to implement the second aspect or the second aspect
  • the network storage network element can be used to implement the communication method described in the third aspect or any one of the possible implementation manners of the third aspect.
  • the communication system may also include other devices or network elements, such as user plane network elements, that interact with the session management network element in the above-mentioned first aspect or in the solution provided in the embodiment of this application,
  • the user plane network element can be used to execute the method executed by the user plane function network element in the solution provided in the embodiment of the present application.
  • the communication system may also include other devices or network elements that interact with the access management network element in the second aspect described above or in the solution provided in the embodiment of this application, such as a session management network element
  • the session management network element can be used to execute the method executed by the session management function network element in the solution provided in the embodiment of the present application.
  • the communication system may also include other devices or network elements that interact with the network storage network element in the third aspect described above or in the solution provided in the embodiment of this application, such as a session management network element or An access management network element, the session management network element or the access management network element may be used to execute the method performed by the session management function network element in the solution provided in the embodiment of the present application.
  • a session management network element or An access management network element such as a session management network element or An access management network element, the session management network element or the access management network element may be used to execute the method performed by the session management function network element in the solution provided in the embodiment of the present application.
  • a computer-readable storage medium stores instructions that, when run on a computer, cause the computer to execute the communication method described in any of the above aspects.
  • a computer program product containing instructions, when the instructions run on a computer, the computer executes the communication method described in any of the foregoing aspects.
  • FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the application
  • FIG. 2 is a first structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 3 is a first schematic flowchart of a communication method provided by an embodiment of this application.
  • FIG. 4 is a schematic diagram 2 of the flow of the communication method provided by an embodiment of this application.
  • FIG. 5 is a third schematic flowchart of a communication method provided by an embodiment of this application.
  • FIG. 6 is a fourth schematic flowchart of a communication method provided by an embodiment of this application.
  • FIG. 7 is a second structural diagram of a communication device provided by an embodiment of this application.
  • At least one means one or more, and “plurality” means two or more.
  • the following at least one item (a)” or similar expressions refers to any combination of these items, including any combination of a single item (a) or plural items (a).
  • at least one item (a) of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
  • words such as “first” and “second” are used to distinguish the same items or similar items with substantially the same function and effect. Those skilled in the art can understand that words such as “first” and “second” do not limit the quantity and order of execution, and words such as “first” and “second” do not limit the difference.
  • Fig. 1 is an example of a communication system provided by an embodiment of the application.
  • the communication system provided by the embodiment of the present application may generally include the following devices, network elements, and networks:
  • Terminal equipment It can include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, as well as various forms of terminals, mobile stations (mobile stations, MS ), terminal (terminal), user equipment (UE), soft terminal, etc. For example, water meters, electricity meters, sensors, etc.
  • 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 according to the level of terminal equipment, service requirements, etc. Transmission tunnel.
  • (R)AN network elements can manage wireless resources, provide access services for terminal equipment, and complete the forwarding of control signals and terminal equipment data between terminal equipment and the core network.
  • (R)AN can also be understood as a traditional network Base station.
  • User plane network element used for packet routing and forwarding, and quality of service (QoS) processing of user plane data, etc.
  • the user plane network element may be a user plane function (UPF) network element, and may include an intermediate user plane function (I-UPF) network element , Anchor user plane function (anhor user plane function, A-UPF) network element.
  • UPF user plane function
  • I-UPF intermediate user plane function
  • A-UPF anchor user plane function
  • the user plane network element may still be a UPF network element, or may also have other names, which is not limited in this application.
  • DN Data network
  • the data network in a 5G communication system, can be DN1 and DN2. In the future communication system, the data network may still be a DN, or may also have other names, which is not limited by this application.
  • Access management network element Mainly used for mobility management and access management, etc., and can be used to implement other functions other than session management in the mobility management entity (mobility management entity, MME) function, such as lawful interception And access authorization/authentication and other functions.
  • mobility management entity mobility management entity, MME
  • the access management network element may be an access and mobility management function (AMF) network element.
  • AMF access and mobility management function
  • the access management network element may still be an AMF network element, or may also have other names, which is not limited in this application.
  • Session management network element Mainly used for session management, terminal equipment Internet Protocol (IP) address allocation and management, selection of end points that can manage user plane functions, policy control and charging function interfaces, and downlink data Notification etc.
  • IP Internet Protocol
  • the session management network element may be a session management function (SMF) network element, and may include an intermediate session management function (I-SMF) network element , Anchor session management function (anhor session management function, A-SMF) network element.
  • SMF session management function
  • I-SMF intermediate session management function
  • A-SMF anchor session management function
  • the session management network element may still be an SMF network element, or may also have other names, which is not limited in this application.
  • Policy control network element a unified policy framework used to guide network behavior, and provide policy rule information for control plane function network elements (such as AMF, SMF network elements, etc.).
  • the policy control network element may be a policy and charging rules function (PCRF) network element.
  • PCF policy control function
  • the policy control network element may still be a PCF network element, or may also have other names, which is not limited in this application.
  • Authentication service network element used for authentication service, generating keys to realize two-way authentication of terminal equipment, and supporting a unified authentication framework.
  • the authentication service network element may be an authentication server function (authentication server function, AUSF) network element.
  • the authentication server function network element may still be an AUSF network element, or may have other names, which is not limited by this application.
  • Data management network element used to process terminal equipment identification, access authentication, registration and mobility management, etc.
  • the data management network element may be a unified data management (UDM) network element.
  • UDM unified data management
  • unified data management may still be UDM network elements, or may also have other names, which are not limited by this application.
  • Application network elements used for data routing affected by applications, access to network open function network elements, interaction with policy frameworks for policy control, etc.
  • the application network element may be an application function (AF) network element.
  • AF application function
  • the application network element may still be an AF network element, or may also have other names, which is not limited by this application.
  • Network storage network element used to maintain real-time information of all network functions and services in the network.
  • the network storage network element may be a network repository function (NRF) network element (not shown in FIG. 1).
  • NRF network repository function
  • the network storage network element may still be an NRF network element, or may also have other names, which are not limited by this application.
  • the aforementioned network elements or functions may be network elements in hardware devices, software functions running on dedicated hardware, or virtualization functions instantiated on a platform (for example, a cloud platform).
  • the above-mentioned network elements or functions can be divided into one or more services, and further, there may be services independent of the network functions.
  • an instance of the above-mentioned function, an instance of a service included in the above-mentioned function, or an instance of a service that exists independently of the network function may be referred to as a service instance.
  • the AF network element may be abbreviated as AF
  • the NRF network element is abbreviated as NRF
  • the PCF network element is abbreviated as PCF. That is, the AF described later in this application can be replaced with application network elements, NRF can be replaced with network storage network elements, and PCF can be replaced with policy control network elements.
  • the device is an SMF entity, AMF entity, or NRF entity as examples to describe the method for UPF selection or SMF selection.
  • the chip in the SMF entity or the chip in the AMF entity Or it is the implementation method of the chip in the NRF entity please refer to the specific descriptions of the SMF entity, AMF entity, and NRF entity respectively, and the introduction will not be repeated.
  • embodiments of the present application are not limited to the foregoing system architecture, and can also be applied to other future communication systems, such as the 6th generation (6G) system architecture.
  • 6G 6th generation
  • the names of the various network elements used in the embodiments of the present application may maintain the same function in the future communication system, but the names will change.
  • the aforementioned communication system may also include other network elements, equipment, network entities, or network subsystems, such as binding support function (BSF) network elements, etc.
  • BSF binding support function
  • the terminal device communicates with the AMF network element through the N1 interface (referred to as N1), and communicates with the (R)AN network element through the Uu port, and the (R)AN network element communicates with the AMF network element through the N2 interface (referred to as N2) Communication, communicate with I-UPF network element through N3 interface (abbreviated as N3), I-UPF network element communicates with DN1 through N6 interface (abbreviated as N6), communicate with I-SMF network element through N4 interface (abbreviated as N4), through N9 Interface (N9 for short) communicates with A-UPF network element, A-UPF network element communicates with DN2 through another N6 interface, communicates with A-SMF network element through another N4 interface, and AMF network element through N22 interface (N22 for short) Communicate with NSSF network element, communicate with AUSF network element through N12 interface (abbreviated as N12), communicate with UDM network element through N8 interface (abbreviated as N
  • the I-UPF network element and the I-SMF network element shown in FIG. 1 may be respectively a visited UPF (visited UPF, V-UPF) network element and a visited SMF (visited SMF, V-SMF) network element
  • the A-UPF network element and the A-SMF network element shown in FIG. 1 may be a home UPF (home UPF, H-UPF) network element and a home SMF (home SMF, H-SMF) network element, respectively.
  • the network architecture shown in FIG. 1 is a network architecture based on reference points.
  • the AMF network element, I-SMF network element, A-SMF network element, PCF network element, NSSF network element, AUSF network element, UDM network element, AF network element and other control plane network elements shown in Figure 1 are mutually connected.
  • a service-oriented interface can also be used to interact with each other, which is not limited in the embodiment of the present application.
  • the various network elements in the embodiment of the present application may be a communication device, or may be a chip or a chip system that can be used in the communication device, which is not limited in the embodiment of the present application.
  • the terminal device (terminal) in the embodiment of the present application may be a device used to implement wireless communication functions, such as a terminal or a chip that can be used in a terminal.
  • the terminal may be a user equipment (UE), an access terminal, a terminal unit, a terminal station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, and wireless communication in a 5G network or a future evolved PLMN.
  • the access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices or wearable devices, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, industrial control (industrial) Wireless terminal in control), wireless terminal in self-driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety (transportation safety) Terminal, wireless terminal in smart city, wireless terminal in smart home, etc.
  • the terminal can be mobile or fixed.
  • the access network equipment in the embodiments of the present application usually includes equipment used to access the core network, such as base stations, broadband network gateways (BNG), aggregation switches, and non-third-generation partner plans (3rd generation partnership project, 3GPP) access equipment, etc.
  • base stations may include base stations in various forms, such as macro base stations, micro base stations (also referred to as small stations), relay stations, and access points.
  • various network elements or network devices or terminal devices in the embodiments of the present application may also be referred to as communication devices, which may be a general-purpose device or a dedicated device, which is not specifically limited in the embodiments of the present application.
  • the related functions of the policy control network element or network device in the embodiments of the present application can be implemented by one device, or by multiple devices, or by one or more functional modules in one device.
  • the embodiments of this application do not specifically limit this. It is understandable that the above functions can be network elements in hardware devices, software functions running on dedicated hardware, or a combination of hardware and software, or instantiated on a platform (for example, a cloud platform) Virtualization function.
  • the related functions of various network elements or network devices or terminal devices in the embodiments of the present application may be implemented by the communication apparatus 200 shown in FIG. 2.
  • the communication device 200 includes one or more processors 201, a communication line 202, and at least one communication interface, and optionally may also include a memory 203.
  • the processor 201 can be a general-purpose central processing unit (central processing unit, CPU) or microprocessor or application-specific integrated circuit (ASIC), or one or more programs for controlling the execution of the program of the application. integrated circuit.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • the communication line 202 may include a path for connecting different components.
  • the communication interface 204 may be a transceiver module for communicating with other devices or communication networks, such as Ethernet, RAN, and wireless local area networks (WLAN).
  • the transceiver module may be a device such as a transceiver, a transceiver circuit, or a transceiver.
  • the communication interface 204 may also be a transceiver circuit located in the processor 201 to implement signal input and signal output of the processor.
  • the memory 203 may be a device having a storage function. For example, it can be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions Dynamic storage devices can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM), or other optical disk storage, optical disc storage ( Including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be stored by a computer Any other media taken, but not limited to this.
  • the memory 203 is coupled with the processor 201.
  • the memory 203 may exist independently and be connected to the processor 201 through a communication line 202.
  • the memory 203 may also be integrated with the processor 201.
  • the memory 203 is used to store computer-executed instructions for executing the solution of the present application, and the processor 201 controls the execution.
  • the processor 201 is configured to execute computer-executable instructions stored in the memory 203, so as to implement the communication method provided in the embodiment of the present application.
  • the processor 201 may also execute the processing-related functions in the communication method provided in the following embodiments of the present application, and the communication interface 204 is responsible for communicating with other devices or communication networks.
  • the application embodiment does not specifically limit this.
  • the computer-executable instructions in the embodiments of the present application may also be referred to as application program code, which is not specifically limited in the embodiments of the present application.
  • the processor 201 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 2.
  • the communication device 200 may include multiple processors, for example, the processor 201 and the processor 207 in FIG. 2. Each of these processors can be a single-CPU (single-CPU) processor or a multi-core (multi-CPU) processor.
  • the processor here may refer to one or more devices, circuits, and/or processing cores for processing data (for example, computer program instructions).
  • the communication apparatus 200 may further include an output device 205 and an input device 206.
  • the output device 205 communicates with the processor 201 and can display information in a variety of ways.
  • the output device 205 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait.
  • the input device 206 communicates with the processor 201 and can receive user input in a variety of ways.
  • the input device 206 may be a mouse, a keyboard, a touch screen device, or a sensor device.
  • the above-mentioned communication device 200 may sometimes be referred to as a communication device, which may be a general-purpose device or a special-purpose device.
  • the embodiment of the present application does not limit the type of the communication device 200.
  • the network element name, device name, and network name shown in FIG. 1 are used as examples for description.
  • SMF network elements, UPF network elements, AMF network elements, and NRF network elements the functions of the aforementioned session management network elements, user plane network elements, access management network elements, and network storage network elements are respectively described.
  • FIG. 3 is a schematic flow chart of a communication method provided by this application, which can be applied to the process of selecting a UPF network element performed by an SMF network element in the communication system shown in FIG. 1.
  • the communication method includes the following steps:
  • the session management function SMF network element obtains the first control information and the second control information.
  • the first control information includes first interface information of at least one candidate I-UPF network element, and the second control information includes first interface information of at least one candidate A-UPF network element.
  • the at least one candidate I-UPF network element may be a radio access network RAN that is connected to the terminal device, such as a UPF network element with a second interface between base stations.
  • the at least one candidate A-UPF network element may be a UPF network element that has a third interface with the data network DN to be accessed by the terminal device.
  • the first interface refers to the N9 interface between UPF network elements.
  • the session management function SMF network element acquiring the first control information and the second control information may include the following steps:
  • the SMF network element obtains the first control information from at least one candidate I-UPF network element or a network storage library function NRF network element;
  • the SMF network element obtains the first control information from at least one candidate A-UPF network element or a network storage library function NRF network element.
  • the SMF network element can obtain the first interface information of each candidate UPF network element from at least one candidate I-UPF network element itself or at least one candidate A-UPF network element itself, or the NRF network element can obtain each candidate UPF network element.
  • the first interface information of the meta can be obtained from at least one candidate I-UPF network element itself or at least one candidate A-UPF network element itself, or the NRF network element can obtain each candidate UPF network element.
  • the SMF network element may send an acquisition request for obtaining the first interface information of each candidate UPF network element to each candidate UPF network element or NRF network element, and receive the acquisition sent by each candidate UPF network element or NRF network element The first interface information of each candidate UPF network element carried in the response.
  • the first interface information of each candidate UPF network element obtained by the SMF network element from the NRF network element may be sent by each candidate UPF network element or OAM device to the NRF network element in the UPF network element registration process, and the NRF network element Centrally stored first interface information.
  • the NRF network element may store the first interface information of each candidate UPF network element in the configuration file of each candidate UPF network element.
  • the configuration file may be a configuration file in various forms such as an electronic form, a text file, etc., which is not limited in the embodiment of the present application.
  • the configuration file may be a configuration file in various forms such as an electronic form, a text file, etc., which is not limited in the embodiment of the present application.
  • the SMF network element may also obtain second interface information and/or third interface information.
  • the second interface information may include network information of the radio access network RAN to which each candidate UPF network element is reachable, such as the IP address, device identifier, and device identifier of the radio access network device that has an N3 interface with each candidate UPF network element.
  • the third interface information may include the IP address, network identifier, network name, location information, etc. of the data network reachable by each candidate UPF network element.
  • the candidate I-UPF network element refers to the candidate UPF network element on the user side
  • the candidate A-UPF network element refers to the candidate UPF network element on the data network side. Therefore, for the candidate I-UPF network element, the embodiment of this application does not need to care about the third interface information of the candidate I-UPF network element, while for the candidate A-UPF network element, the embodiment of this application does not need to care about the candidate A-UPF network.
  • the second interface information of the element is used to narrow the selection range of the candidate I-UPF network element and the candidate A-UPF network element, and further improve the efficiency of the SMF network element in selecting the UPF network element.
  • the SMF network element determines, according to the first control information and the second control information, that a first interface exists between the first candidate I-UPF network element and the first candidate A-UPF network element.
  • the first candidate I-UPF network element is a user plane network element among at least one candidate I-UPF network element
  • the first candidate A-UPF network element is a user plane network element among at least one candidate A-UPF network element.
  • the first control information may include: at least one set of Internet Protocol IP addresses of the UPF network element reachable by the first interface of the candidate I-UPF network element; the second control information may include: at least one The Internet Protocol IP address of the first interface of the candidate A-UPF network element.
  • the SMF network element determines that there is a first interface between the first candidate I-UPF network element and the first candidate A-UPF network element according to the first control information and the second control information, which may include the following steps:
  • the SMF network element determines that the first interface of the first candidate I-UPF network element is reachable.
  • the Internet protocol (IP) address set of the UPF network element has the Internet protocol of the first interface of the first candidate A-UPF network element. IP address.
  • At least one candidate I-UPF network element may be one candidate I-UPF network element, or may be multiple candidate I-UPF network elements.
  • any UPF network element among the at least one candidate I-UPF network element there may be one or more other UPF network elements reachable by its first interface.
  • the other UPF network elements reachable by their respective first interfaces may be the same or different, which is not limited in the embodiment of the present application.
  • At least one candidate I-UPF network element includes candidate I-UPF network element 1 and candidate I-UPF network element 2.
  • other UPF network elements reachable by the first interface of candidate I-UPF network element 1 may include UPF network element 3 and UPF network element 4, and other UPF network elements reachable by the first interface of candidate I-UPF network element 2
  • the elements may include UPF network element 4 and UPF network element 5, and other UPF network elements that are reachable by the first interface of the two candidate I-UPF network elements include UPF network element 4.
  • UPF network elements reachable by the first interface of candidate I-UPF network element 1 may include UPF network element 3 and UPF network element 4, and other UPF network elements reachable by the first interface of candidate I-UPF network element 2
  • the network element may include the UPF network element 5 and the UPF network element 6. There is no intersection between the UPF network element sets composed of other UPF network elements whose first interfaces of the two candidate I-UPF network elements are respectively reachable.
  • the correspondence between the following at least one candidate A-UPF network element and other UPF network elements whose first interface is reachable can refer to the above at least one candidate I-
  • the description of the correspondence between the UPF network element and the UPF network element whose first interface of at least one candidate I-UPF network element is reachable will not be repeated in this embodiment of the application.
  • IP address set of the UPF network element whose first interface of the first candidate I-UPF network element is reachable is: ⁇ 192.168.1.xx, 192.168.2.56, 192.168.125.2 ⁇ 192.168.125.25 ⁇ , where "Xx" means any IP address in the network segment 192.168.1.1 ⁇ 192.168.1.255.
  • any IP address indicates that the first candidate A-UPF network element is a UPF network element that is reachable by the first candidate I-UPF network element, that is, there is a first interface between two UPF network elements.
  • the first control information may include: the Internet Protocol IP address of the first interface of at least one candidate I-UPF network element; the second control information may include: at least one candidate A-UPF network element The set of Internet Protocol IP addresses of UPF network elements reachable by the first interface.
  • the SMF network element determines that there is a first interface between the first candidate I-UPF network element and the first candidate A-UPF network element according to the first control information and the second control information, which may include the following steps:
  • the SMF network element determines that the Internet Protocol IP address of the first interface of the first candidate I-UPF network element exists in the set of Internet Protocol IP addresses of the UPF network element whose first interface is reachable by the first candidate A-UPF network element.
  • IP address set of the UPF network element reachable by the first interface of the first candidate A-UPF network element is: ⁇ 192.168.1.xx, 192.168.2.56, 192.168.125.2 ⁇ 192.168.125.25 ⁇ , where "Xx" means any IP address in the network segment 192.168.1.1 ⁇ 192.168.1.255.
  • the Internet Protocol IP address of the first interface of the first candidate I-UPF network element is any IP address in the network segment 192.168.1.1 ⁇ 192.168.1.255, or 192.168.2.56, or 192.168.125.2 ⁇ 192.168.125.25
  • Any IP address indicates that the first candidate I-UPF network element is a UPF network element that is reachable by the first candidate A-UPF network element, that is, there is a first interface between two UPF network elements.
  • the IP address of each candidate UPF network element refers to the IP address allocated by the network for one UPF network element, and the set of IP addresses of other UPF network elements that are reachable by one UPF network element includes the first UPF network element that exists between it and the UPF network element. IP addresses of other UPF network elements on an interface.
  • the IP address set can be a set of one or more IP addresses, one or more network segments, or a set of one or more IP addresses plus one or more network segments.
  • the network segment can be expressed in the form of IP address prefix plus prefix length, such as: IP address prefix/IP address prefix length, or in the form of IP address plus mask, such as: IP address/address mask.
  • the network segment can also take the form of the first address and the last address of the network segment, such as: the first address of the network segment to the end address of the network segment.
  • the IP address set includes multiple consecutive IP addresses
  • the start IP address + The end IP address is expressed in the form of the above IP address range: 192.168.125.2 ⁇ 192.168.125.25.
  • the first control information may include: at least one candidate I-UPF network element's first interface reachable data center DC identification set; the second control information may include: at least one candidate A- The ID of the data center DC where the UPF network element is located.
  • the SMF network element determines that there is a first interface between the first candidate I-UPF network element and the first candidate A-UPF network element according to the first control information and the second control information, which may include the following steps:
  • the SMF network element determines that there is an identifier of the data center DC where the first candidate A-UPF network element is located in the identification set of the data center DC to which the first interface of the first candidate I-UPF network element is reachable.
  • the identifier set of the data center DC to which the first interface of the first candidate I-UPF network element is reachable is: ⁇ DC1, DC3, DC6 ⁇ . If the identifier of the data center DC where the first candidate A-UPF network element is located is any one of the identifiers DC1, DC3, and DC6 of the aforementioned data center DC, it means that the first candidate A-UPF network element is located in the first candidate I- In the data center DC where the UPF network element is reachable, that is, there is a first interface between two UPF network elements.
  • the first control information may include: the identification of the data center DC where at least one candidate I-UPF network element is located; the second control information may include: the information of at least one candidate A-UPF network element The ID set of the data center DC that the first interface is reachable.
  • the SMF network element determines that there is a first interface between the first candidate I-UPF network element and the first candidate A-UPF network element according to the first control information and the second control information, which may include the following steps:
  • the SMF network element determines that there is an identifier of the data center DC where the first candidate I-UPF network element is located in the identification set of the data center DC to which the first interface of the first candidate A-UPF network element is reachable.
  • the identifier set of the data center DC to which the first interface of the first candidate A-UPF network element is reachable is: ⁇ DC0, DC2, DC5 ⁇ . If the ID of the data center DC where the first candidate I-UPF network element is located is any one of the aforementioned data center DC IDs DC0, DC2, and DC5, it means that the first candidate I-UPF network element is located in the first candidate I-UPF In the data center DC where the network elements are reachable, that is, there is a first interface between two UPF network elements.
  • the identifier of the data center DC may be an instance identifier of a data center DC, a data center name, and other character strings represented by different combinations of characters such as numbers, underscores, English letters, etc., used to represent the identity of the data center DC.
  • the first control information may include: at least one candidate I-UPF network element's first interface reachable UPF network element identifier set; the second control information may include: at least one candidate A- ID of the UPF network element.
  • the SMF network element determines that there is a first interface between the first candidate I-UPF network element and the first candidate A-UPF network element according to the first control information and the second control information, which may include the following steps:
  • the SMF network element determines that the identifier of the first candidate A-UPF network element exists in the identifier set of the UPF network element whose first interface is reachable by the first candidate I-UPF network element.
  • the identifier set of the UPF network element that is reachable by the first interface of the first candidate I-UPF network element is: ⁇ UPF-ID1, UPF-ID8, UPF-ID29 ⁇ . If the identifier of the first candidate A-UPF network element is any one of the above-mentioned reachable UPF network element identifiers UPF-ID1, UPF-ID8, UPF-ID29, it means that the first candidate A-UPF network element is the first The UPF network element to which the candidate I-UPF network element is reachable, that is, there is a first interface between two UPF network elements.
  • the first control information may include: the identification of at least one candidate I-UPF network element; the second control information may include: the first interface of at least one candidate A-UPF network element is reachable The identifier set of the UPF network element.
  • the SMF network element determines that there is a first interface between the first candidate I-UPF network element and the first candidate A-UPF network element according to the first control information and the second control information, which may include the following steps:
  • the SMF network element determines that the identifier of the first candidate I-UPF network element exists in the identifier set of the UPF network element whose first interface is reachable by the first candidate A-UPF network element.
  • the identifier set of the UPF network element that is reachable by the first interface of the first candidate A-UPF network element is: ⁇ UPF-ID3, UPF-ID15, UPF-ID48 ⁇ . If the identifier of the first candidate I-UPF network element is any one of the above-mentioned reachable UPF network element identifiers UPF-ID1, UPF-ID8, UPF-ID29, it means that the first candidate I-UPF network element is the first The UPF network element to which the candidate A-UPF network element is reachable, that is, the first interface exists between two UPF network elements.
  • the identifier of each candidate UPF network element may be the instance identifier of the UPF network element, the name of the network element, and other characters represented by different combinations of characters such as numbers, underscores, English letters, etc., to indicate the identity of the UPF network element string.
  • the first control information may include: at least one candidate I-UPF network element's first interface reachable UPF network element position set; the second control information may include: at least one candidate A- The location of the UPF network element.
  • the SMF network element determines that there is a first interface between the first candidate I-UPF network element and the first candidate A-UPF network element according to the first control information and the second control information, which may include the following steps:
  • the SMF network element determines that there is a position of the candidate first A-UPF network element in the location set of the UPF network element to which the first interface of the first candidate I-UPF network element is reachable.
  • the location set of the UPF network element reachable by the first interface of the first candidate I-UPF network element is: ⁇ SMF_zone_ID, SMF_set_ID ⁇ , where SMF_zone_ID and SMF_set_ID are respectively the ones that control the above-mentioned reachable UPF network element
  • SMF_zone_ID and SMF_set_ID are respectively the ones that control the above-mentioned reachable UPF network element
  • the service area identifier or service set identifier of the SMF network element is: ⁇ SMF_zone_ID, SMF_set_ID ⁇ , where SMF_zone_ID and SMF_set_ID are respectively the ones that control the above-mentioned reachable UPF network element.
  • the location of the first candidate A-UPF network element is any one of the above-mentioned reachable UPF network element location SMF_zone_ID, SMF_set_ID, it means that the first candidate A-UPF network element is the first candidate I-UPF network element reachable The UPF network element, that is, the first interface exists between the two UPF network elements.
  • the first control information may include: the location of at least one candidate I-UPF network element; the second control information may include: the first interface of at least one candidate A-UPF network element is reachable The location collection of UPF network elements.
  • the SMF network element determines that there is a first interface between the first candidate I-UPF network element and the first candidate A-UPF network element according to the first control information and the second control information, which may include the following steps:
  • the SMF network element determines that there is a position of the first candidate I-UPF network element in the set of positions of the UPF network element to which the first interface of the first candidate A-UPF network element is reachable.
  • the location set of the UPF network element reachable by the first interface of the first candidate A-UPF network element is: ⁇ SMF_zone_ID, SMF_set_ID ⁇ , where SMF_zone_ID and SMF_set_ID are respectively the ones that control the aforementioned reachable UPF network elements
  • SMF_zone_ID and SMF_set_ID are respectively the ones that control the aforementioned reachable UPF network elements
  • the service area identifier or service set identifier of the SMF network element If the position of the first candidate I-UPF network element is any one of the above-mentioned reachable UPF network element position SMF_zone_ID, SMF_set_ID, it means that the first candidate I-UPF network element is the first candidate A-UPF network element reachable
  • the UPF network element that is, the first interface exists between the two UPF network elements.
  • each candidate UPF network element may be the service area identifier or service set identifier of the SMF network element that controls the UPF network element, and other characters represented by different combinations of numbers, underscores, English letters, etc., to indicate control
  • the service area identifier or service set identifier of the SMF network element of the UPF network element may be the service area identifier or service set identifier of the SMF network element that controls the UPF network element, and other characters represented by different combinations of numbers, underscores, English letters, etc., to indicate control The service area identifier or service set identifier of the SMF network element of the UPF network element.
  • the first interface information may also include other information that can be used to indicate candidate I-UPF network elements and candidate A-UPF Whether there is other information about the first interface between the network elements is not repeated here.
  • the SMF network element selects the first candidate I-UPF network element and the first candidate A-UPF network element as the target UPF network element.
  • the foregoing first interface information may also include interface parameter information of the N9 interface of the candidate UPF network element, such as at least one of bandwidth, interface type (such as optical fiber, network cable, wireless, coaxial cable, etc.), weight, and load. item.
  • the SMF network element can also preferentially select the target UPF network element according to the above-mentioned interface parameter information. For example, the SMF network element can select a combination of multiple candidate UPF network elements ⁇ candidate I-UPF network element+candidate A-UPF network element ⁇ that satisfies the first interface described in S302 with a larger bandwidth and a higher interface data rate.
  • a group of candidate UPF network elements with higher, higher weight and lower load are used as target UPF network elements.
  • the SMF network element first determines the at least one candidate I-UPF network element according to the first interface information of the at least one candidate I-UPF network element and the first interface information of the at least one candidate A-UPF network element There is a first interface between the first candidate I-UPF network element and the first candidate A-UPF network element among at least one candidate A-UPF network element, and then the first candidate I-UPF network element and the first candidate are selected.
  • the A-UPF network element can avoid the situation that the first interface does not exist between two or more UPF network elements selected by the SMF network element, and the normal session connection cannot be established, and multiple interactions can be reduced. Only by selecting a suitable target UPF network element can the signaling waste, resource waste and time waste caused by the selection of the appropriate target UPF network element can improve the reliability and efficiency of SMF network element selection of UPF network element.
  • FIG. 4 is a schematic flowchart of another communication method provided by this application, which can be applied to the selection process of the AMF network element in the communication system shown in FIG. 1 to execute the SMF network element.
  • the communication method includes the following steps:
  • the access and mobility management function AMF network element acquires third control information and fourth control information.
  • the third control information includes the first interface information of the user plane function UPF network element controlled by at least one candidate intermediate session management function I-SMF network element, and the fourth control information includes at least one candidate anchor session management function A-SMF network element.
  • the at least one candidate I-SMF network element may be an SMF network element in which there is a UPF network element with a second interface between the controlled UPF network element and the radio access network RAN accessed by the terminal device.
  • the at least one candidate A-SMF network element may be an SMF network element that has a UPF network element with a third interface between the controlled UPF network element and the data network DN to be accessed by the terminal device.
  • the first interface refers to the N9 interface between the UPF network elements controlled by the candidate SMF network element.
  • the access and mobility management function AMF network element acquiring the third control information and the fourth control information may include the following steps:
  • the AMF network element obtains the third control information from the network storage library function NRF network element or at least one candidate I-SMF network element;
  • the AMF network element obtains the fourth control information from the network storage library function NRF network element or at least one candidate A-SMF network element.
  • the AMF network element can obtain the first interface information of the UPF network element controlled by each candidate SMF network element from at least one candidate I-SMF network element itself or at least one candidate A-SMF network element itself, or it can be an NRF network element Obtain the first interface information of the UPF network element controlled by each candidate SMF network element.
  • the AMF network element may send to each candidate SMF network element or NRF network element an acquisition request for obtaining the first interface information of the UPF network element controlled by each candidate SMF network element, and receive each candidate SMF network element or NRF The first interface information of the UPF network element controlled by each candidate SMF network element carried in the acquisition response sent by the network element.
  • the first interface information of each candidate SMF network element obtained by the AMF network element from the NRF network element may be the UPF network element or OAM device controlled by each candidate SMF network element and sent to the NRF network element in the UPF network element registration process.
  • the first interface information centrally stored by the NRF network element, or the UPF network element controlled by each candidate SMF network element is sent to the candidate SMF network element, and then the candidate SMF network element is sent to the NRF network element, and the NRF network element
  • the first interface information stored in the element, or the UPF network element or OAM device controlled by each candidate SMF network element is sent to the NRF network element, and the NRF network element sends the first interface information of the UPF network element to the candidate SMF network
  • the candidate SMF network element summarizes the first interface information of each UPF network element controlled by the candidate SMF network element and then reselects and sends it to the NRF network element, and the NRF network element centrally stores the first interface information.
  • the NRF network element may store the first interface information of the UPF network element controlled by each candidate SMF network element in the configuration file of each candidate SMF network element.
  • the configuration file may be a configuration file in various forms such as an electronic form, a text file, etc., which is not limited in the embodiment of the present application.
  • For the detailed implementation manner of collecting and obtaining the first interface information reference may be made to the related description of the method embodiment on the NRF network element side shown in FIG. 5, which will not be repeated here.
  • the UPF network element controlled by the candidate SMF network element includes one or more UPF network elements.
  • the AMF network element may also obtain the second interface information and/or the third interface information of the UPF network element controlled by each candidate SMF network element.
  • the second interface information may include the network information of the radio access network RAN that is reachable by the UPF network element controlled by each candidate SMF network element, such as a radio interface with an N3 interface between the UPF network element controlled by each candidate SMF network element
  • the third interface information may include the IP address, network identification, network name, location information, etc. of the data network reachable by the UPF network element controlled by each candidate SMF network element.
  • the candidate I-SMF network element refers to the candidate SMF network element on the user side
  • the candidate A-SMF network element refers to the candidate SMF network element on the data network side. Therefore, for the candidate I-SMF network element, the embodiment of this application does not need to care about the third interface information of the UPF network element controlled by the candidate I-SMF network element, while for the candidate A-SMF network element, the embodiment of this application does not need to care about The second interface information of the UPF network element controlled by the candidate A-SMF network element is used to narrow the selection range of the candidate I-SMF network element and the candidate A-SMF network element, and further improve the efficiency of the AMF network element selecting the SMF network element.
  • the AMF network element determines, according to the third control information and the fourth control information, that there is a first interface between the UPF network element controlled by the first candidate I-SMF network element and the UPF network element controlled by the first candidate A-SMF network element .
  • the first candidate I-SMF network element is an SMF network element among at least one candidate I-SMF network element
  • the first candidate A-SMF network element is an SMF network element among at least one candidate A-SMF network element.
  • the third control information may include: a set of Internet Protocol IP addresses of UPF network elements that are reachable by the first interface of the UPF network element controlled by at least one candidate I-SMF network element; fourth control information It may include: the Internet Protocol IP address of the first interface of the UPF network element controlled by at least one candidate A-SMF network element.
  • the AMF network element determines, according to the third control information and the fourth control information, between the UPF network element controlled by the first candidate I-SMF network element and the UPF network element controlled by the first candidate A-SMF network element There is a first interface, which may include the following steps:
  • the AMF network element determines that the first candidate I-SMF network element controls the UPF network element controlled by the first candidate A-SMF network element.
  • the first candidate A-SMF network element controls the UPF network element in the Internet Protocol IP address set of the UPF network element.
  • the Internet Protocol IP address of an interface is
  • At least one candidate I-SMF network element may be one candidate I-SMF network element, or may be multiple candidate I-SMF network elements.
  • the SMF to which other UPF network elements reachable by the first interface of the UPF network element controlled by it belongs may be one or more.
  • the SMF network elements to which other UPF network elements reachable by the first interface of the respective control UPF network element belong may be the same or different, which is not limited in the embodiment of the present application.
  • At least one candidate I-SMF network element includes candidate I-SMF network element 1 and candidate I-SMF network element 2.
  • the first interface of the UPF network element controlled by candidate I-SMF network element 1 may include SMF network element 3 and SMF network element 4, and candidate I-SMF network element 1.
  • the SMF network element to which the first interface of the controlled UPF network element is reachable may include SMF network element 4 and SMF network element 5, the first interface of the UPF network element controlled by two candidate I-SMF network elements
  • the SMF network elements to which other reachable UPF network elements belong all include SMF network element 4.
  • the SMF network elements of other UPF network elements whose first interface is reachable by the UPF network element controlled by the candidate I-SMF network element 1 may include SMF network element 3 and SMF network element 4, and the candidate I-SMF network element 1
  • the SMF network elements to which other UPF network elements are reachable by the first interface of the controlled UPF network element may include SMF network element 5 and SMF network element 6, and the second UPF network element controlled by the two candidate I-SMF network elements
  • the IP address set of the UPF network element reachable by the first interface of the UPF network element controlled by the first candidate I-SMF network element is: ⁇ 192.168.1.xx, 192.168.2.56, 192.168.125.2 ⁇ 192.168 .125.25 ⁇ , where "xx" represents any IP address in the network segment 192.168.1.1 ⁇ 192.168.1.255.
  • the Internet Protocol IP address of the first interface of the UPF network element controlled by the first candidate A-SMF network element is any one or more IP addresses in the network segment 192.168.1.1 ⁇ 192.168.1.255, or 192.168.2.56, or 192.168 Any one or more IP addresses from .125.2 to 192.168.125.25 means that the UPF network element controlled by the first candidate A-SMF network element is a UPF network accessible by the UPF network element controlled by the first candidate I-SMF network element Element, that is, there is a first interface between UPF network elements controlled by two candidate SMF network elements.
  • the third control information may include: the Internet Protocol IP address of the first interface of the UPF network element controlled by at least one candidate I-SMF network element;
  • the fourth control information may include: at least one candidate A set of Internet Protocol IP addresses of UPF network elements that are reachable by the first interface of the UPF network element controlled by the A-SMF network element.
  • the AMF network element determines, according to the third control information and the fourth control information, between the UPF network element controlled by the first candidate I-SMF network element and the UPF network element controlled by the first candidate A-SMF network element There is a first interface, which may include the following steps:
  • the AMF network element determines that the first candidate I-SMF network element controls the UPF network element controlled by the first candidate I-SMF network element in the Internet Protocol IP address set of the UPF network element whose first interface is reachable The Internet Protocol IP address of an interface.
  • the IP address set of the UPF network element that is reachable by the first interface of the UPF network element controlled by the first candidate A-SMF network element is: ⁇ 192.168.1.xx, 192.168.2.56, 192.168.125.2 ⁇ 192.168 .125.25 ⁇ , where "xx" represents any IP address in the network segment 192.168.1.1 ⁇ 192.168.1.255.
  • the Internet Protocol IP address of the first interface of the UPF network element controlled by the first candidate I-SMF network element is any one or more IP addresses in the network segment 192.168.1.1 ⁇ 192.168.1.255, or 192.168.2.56, or 192.168 Any one or more IP addresses from .125.2 to 192.168.125.25 means that the UPF network element controlled by the first candidate I-SMF network element is a UPF network accessible by the UPF network element controlled by the first candidate A-SMF network element Element, that is, there is a first interface between UPF network elements controlled by two candidate SMF network elements.
  • the IP address of the UPF network element controlled by each candidate SMF network element refers to the IP address assigned by the network to the UPF network element controlled by one SMF network element, and other SMF network elements that the UPF network element controlled by one SMF network element can reach
  • the set of IP addresses of the controlled UPF network element includes the IP addresses of UPF network elements controlled by other SMF network elements that have a first interface with the UPF network element controlled by the one SMF network element.
  • the IP address set can be a set of one or more IP addresses, one or more network segments, or a set of one or more IP addresses plus one or more network segments.
  • the network segment can be expressed in the form of IP address prefix plus prefix length, such as: IP address prefix/IP address prefix length, or in the form of IP address plus mask, such as: IP address/address mask.
  • the network segment can also take the form of the first address and the last address of the network segment, such as: the first address of the network segment to the end address of the network segment. For example, when the IP address set includes multiple consecutive IP addresses, the start IP address + The end IP address is expressed in the form of the above IP address range: 192.168.125.2 ⁇ 192.168.125.25.
  • the third control information may include: at least one candidate I-SMF network element controlled by the UPF network element of the first interface reachable data center DC identification set;
  • the fourth control information may include: The identifier of the data center DC where the UPF network element controlled by at least one candidate A-SMF network element is located.
  • the AMF network element determines, according to the third control information and the fourth control information, between the UPF network element controlled by the first candidate I-SMF network element and the UPF network element controlled by the first candidate A-SMF network element There is a first interface, which may include the following steps:
  • the AMF network element determines that the first candidate I-SMF network element is controlled by the UPF network element.
  • the first interface of the UPF network element is controlled by the data center DC.
  • the data center where the UPF network element controlled by the first candidate A-SMF network element is located exists in the ID set The ID of the DC.
  • the ID set of the data center DC to which the first interface of the UPF network element controlled by the first candidate I-SMF network element is reachable is: ⁇ DC1, DC3, DC6 ⁇ . If the identifier of the data center DC where the UPF network element controlled by the first candidate A-SMF network element is located is any one of the identifiers DC1, DC3, and DC6 of the aforementioned data center DC, it means that the first candidate A-SMF network element controls The UPF network element is located in the data center DC where the UPF network element controlled by the first candidate I-SMF network element is reachable, that is, there is a first interface between the two UPF network elements.
  • the third control information may include: the identifier of the data center DC where the UPF network element controlled by at least one candidate I-SMF network element is located; the fourth control information may include: at least one candidate A -The identifier set of the data center DC that is reachable by the first interface of the UPF network element controlled by the SMF network element.
  • the AMF network element determines, according to the third control information and the fourth control information, between the UPF network element controlled by the first candidate I-SMF network element and the UPF network element controlled by the first candidate A-SMF network element There is a first interface, which may include the following steps:
  • the AMF network element determines that the first candidate A-SMF network element controls the UPF network element.
  • the first interface of the UPF network element is controlled by the data center DC.
  • the data center where the UPF network element controlled by the first candidate I-SMF network element is located exists in the ID set The ID of the DC.
  • the identifier set of the data center DC to which the first interface of the UPF network element controlled by the first candidate A-SMF network element is reachable is: ⁇ DC1, DC3, DC6 ⁇ . If the identifier of the data center DC where the UPF network element controlled by the first candidate I-SMF network element is located is any one of the identifiers DC1, DC3, and DC6 of the aforementioned data center DC, it means that the first candidate I-SMF network element controls The UPF network element is located in the data center DC where the UPF network element controlled by the first candidate A-SMF network element is reachable, that is, there is a first interface between the two UPF network elements.
  • the identifier of the data center DC may be an instance identifier of a data center DC, a data center name, and other character strings represented by different combinations of characters such as numbers, underscores, English letters, etc., used to represent the identity of the data center DC.
  • the third control information may include: at least one candidate I-SMF network element controlled UPF network element of the first interface of the UPF network element reachable UPF network element identification set; the fourth control information may include: The identifier of the UPF network element controlled by at least one candidate A-SMF network element.
  • the AMF network element determines, according to the third control information and the fourth control information, between the UPF network element controlled by the first candidate I-SMF network element and the UPF network element controlled by the first candidate A-SMF network element There is a first interface, which may include the following steps:
  • the AMF network element determines that there is an identifier of the UPF network element controlled by the first candidate A-SMF network element in the identifier set of the UPF network element whose first interface is reachable by the UPF network element controlled by the first candidate I-SMF network element.
  • the identifier set of the UPF network element whose first interface is reachable by the UPF network element controlled by the first candidate I-SMF network element is: ⁇ UPF-ID1, UPF-ID8, UPF-ID29 ⁇ . If the identifier of the UPF network element controlled by the first candidate A-SMF network element is any one of the aforementioned UPF network element identifiers UPF-ID1, UPF-ID8, and UPF-ID29, it means the first candidate A-SMF
  • the UPF network element controlled by the network element is a UPF network element that is reachable by the UPF network element controlled by the first candidate I-SMF network element, that is, there is a first interface between the UPF network elements controlled by the two candidate SMF network elements.
  • the third control information may include: the identifier of the UPF network element controlled by at least one candidate I-SMF network element;
  • the fourth control information may include: the identifier of the UPF network element controlled by at least one candidate A-SMF network element A set of identifiers of UPF network elements that are reachable by the first interface of the UPF network element.
  • the AMF network element determines, according to the third control information and the fourth control information, between the UPF network element controlled by the first candidate I-SMF network element and the UPF network element controlled by the first candidate A-SMF network element There is a first interface, which may include the following steps:
  • the AMF network element determines that there is an identifier of the UPF network element controlled by the first candidate I-SMF network element in the identifier set of the UPF network element whose first interface is reachable by the UPF network element controlled by the first candidate A-SMF network element.
  • the identifier set of the UPF network element that is reachable by the first interface of the UPF network element controlled by the first candidate A-SMF network element is: ⁇ UPF-ID1, UPF-ID8, UPF-ID29 ⁇ . If the identifier of the UPF network element controlled by the first candidate I-SMF network element is any one of the above-mentioned reachable UPF network element identifiers UPF-ID1, UPF-ID8, UPF-ID29, it means the first candidate I-SMF
  • the UPF network element controlled by the network element is a UPF network element that is reachable by the UPF network element controlled by the first candidate A-SMF network element, that is, there is a first interface between the UPF network elements controlled by the two candidate SMF network elements.
  • the identifier of the UPF network element controlled by each candidate SMF network element may be the instance identifier of the UPF network element controlled by the candidate SMF network element, the network element name, and other different combinations of characters such as numbers, underscores, and English letters.
  • the character string used to represent the identity of the UPF network element may be the instance identifier of the UPF network element controlled by the candidate SMF network element, the network element name, and other different combinations of characters such as numbers, underscores, and English letters.
  • the third control information may include: a set of locations of UPF network elements reachable by the first interface of the UPF network element controlled by at least one candidate I-SMF network element; the fourth control information may include: The location of the UPF network element controlled by at least one candidate A-SMF network element.
  • the AMF network element determines, according to the third control information and the fourth control information, between the UPF network element controlled by the first candidate I-SMF network element and the UPF network element controlled by the first candidate A-SMF network element There is a first interface, which may include the following steps:
  • the AMF network element determines that there is a position of the UPF network element controlled by the first candidate A-SMF network element in the set of positions of the UPF network element reachable by the first interface of the UPF network element controlled by the first candidate I-SMF network element.
  • the location set of the UPF network element that is reachable by the first interface of the UPF network element controlled by the first candidate I-SMF network element is: ⁇ SMF_zone_ID, SMF_set_ID ⁇ , where SMF_zone_ID and SMF_set_ID are respectively for controlling the above-mentioned reachability
  • SMF_zone_ID and SMF_set_ID are respectively for controlling the above-mentioned reachability
  • the UPF network element controlled by the first candidate A-SMF network element is any one of the above-mentioned reachable UPF network element positions SMF_zone_ID and SMF_set_ID, it means that the UPF network element controlled by the first candidate A-SMF network element is The UPF network element to which the UPF network element controlled by the first candidate I-SMF network element is reachable, that is, the first interface exists between the UPF network elements controlled by the two candidate SMF network elements.
  • the third control information may include: the position of the UPF network element controlled by at least one candidate I-SMF network element;
  • the fourth control information may include: the position of the UPF network element controlled by at least one candidate A-SMF network element The location collection of UPF network elements that are reachable by the first interface of the UPF network element.
  • the AMF network element determines, according to the third control information and the fourth control information, between the UPF network element controlled by the first candidate I-SMF network element and the UPF network element controlled by the first candidate A-SMF network element There is a first interface, which may include the following steps:
  • the AMF network element determines that there is a position of the UPF network element controlled by the first candidate I-SMF network element in the set of positions of the UPF network element reachable by the first interface of the UPF network element controlled by the first candidate A-SMF network element.
  • the location set of the UPF network element reachable by the first interface of the UPF network element controlled by the first candidate A-SMF network element is: ⁇ SMF_zone_ID, SMF_set_ID ⁇ , where SMF_zone_ID and SMF_set_ID are respectively for controlling the above-mentioned reachability
  • SMF_zone_ID and SMF_set_ID are respectively for controlling the above-mentioned reachability
  • the position of the UPF network element controlled by the first candidate I-SMF network element is any one of the above-mentioned reachable UPF network element positions SMF_zone_ID and SMF_set_ID, it means that the UPF network element controlled by the first candidate I-SMF network element is The UPF network element that is reachable by the UPF network element controlled by the first candidate A-SMF network element, that is, there is a first interface between the UPF network elements controlled by the two candidate SMF network elements.
  • the position of the UPF network element controlled by each candidate SMF network element may be the service area identifier or service set identifier of each candidate SMF network element, and other characters represented by different combinations of numbers, underscores, English letters, etc.
  • the service area identifier or service set identifier of each candidate SMF network element may be the service area identifier or service set identifier of each candidate SMF network element, and other characters represented by different combinations of numbers, underscores, English letters, etc.
  • the first interface information may also include other UPF network elements that can be used to indicate control of candidate I-SMF network elements Whether there is other information about the first interface between the UPF network element controlled by the candidate A-SMF network element and the candidate A-SMF network element is not repeated here.
  • the AMF network element selects the first candidate I-SMF network element and the first candidate A-SMF network element as the target SMF network element.
  • the aforementioned first interface information may also include interface parameter information of the N9 interface of the UPF network element controlled by the candidate SMF network element, such as bandwidth, interface type (such as optical fiber, network cable, wireless, coaxial cable, etc.), weight, At least one of the loads.
  • the AMF network element can also preferentially select the target SMF network element according to the above-mentioned interface parameter information.
  • the AMF network element may select the bandwidth from multiple candidate SMF network element combinations ⁇ candidate I-SMF network element + candidate A-SMF network element ⁇ where the first interface exists between UPF network elements that satisfy the control described in S402
  • a group of candidate SMF network elements larger, higher interface data rate, larger weight, and smaller load are used as target SMF network elements.
  • the candidate I-SMF network element and the candidate A-SMF network element in each candidate SMF network element combination may be one or multiple, which is not limited in the embodiment of the present application.
  • the AMF network element firstly controls the UPF network element according to the first interface information of the first candidate I-SMF network element among the at least one candidate I-SMF network element and the first interface information of the at least one candidate A-SMF network element.
  • the first interface information of the UPF network element controlled by the first candidate A-SMF network element is determined between the UPF network element controlled by the first candidate I-SMF network element and the UPF network element controlled by the first candidate I-SMF network element.
  • the first interface exists, and then the first candidate I-SMF network element and the first candidate A-SMF network element are selected as the target SMF network element, which can avoid UPF controlled by two or more SMF network elements selected by the AMF network element
  • the absence of the first interface between the network elements causes the failure to establish a normal session connection, and it can reduce the signaling waste, resource waste and time waste caused by multiple interactions to select the appropriate target SMF network element, which can improve the AMF network element Choose the reliability and efficiency of SMF network elements.
  • FIG. 5 is a schematic flow diagram of another communication method provided by this application, which can be applied to the NRF network element in the communication system shown in Figure 1 in the process of SMF network element selection of UPF network element, or selection of SMF in AMF network element
  • the network element provides first interface information or candidate UPF network element or candidate SMF network element during the process.
  • the NRF network element can assist the SMF network element to complete the UPF network element selection process shown in Figure 3, or assist the AMF network element to complete the SMF network element selection process shown in Figure 4.
  • the communication method includes the following steps:
  • the network storage library function NRF network element receives and saves the first interface information of at least one user plane function UPF network element.
  • the first interface information includes an identifier of a UPF network element that is reachable by the UPF network element among at least one UPF network element.
  • the above at least one UPF network element includes UPF1, UPF2, and UPF3, and the first interface information includes: the identifier of the UPF network element that is reachable by UPF1 (such as the identifier of UPF4, the identifier of UPF5); the UPF network that is reachable by UPF2 Meta identifier (such as UPF5 identifier, UPF6 identifier); UPF network element identifiers reachable by UPF3 (such as UPF4 identifier, UPF6 identifier), etc.
  • the network storage library function NRF network element receives first interface information of at least one user plane function UPF network element, which may include at least one of the following:
  • the NRF network element receives first interface information sent by at least one UPF network element.
  • the UPF network element may actively send the first interface information of the UPF network element itself to the NRF network element during the process of performing the registration process after it is powered on. It is easy to understand that when the configuration of the first interface information of the UPF network element changes, the UPF network element may also actively send the updated first interface information to the NRF network element.
  • the NRF network element when the NRF network element discovers that a UPF network element is newly added to the network, such as a UPF network element that has just been powered on or performing a registration process, or when the NRF network element learns the first interface information of some UPF network elements During the change, if the NRF network element discovers that the UPF network element 2 that originally had the first interface with the UPF network element 1 is faulty or has been powered off, the NRF network element can also report to the newly added UPF network element or the first interface information has changed The UPF network element sends an update instruction of the first interface information.
  • the NRF network element receives first interface information of at least one UPF network element sent by the operation, management and maintenance OAM device.
  • the OAM device may actively send the first interface information of the UPF network element managed by the OAM device to the NRF network element in the process of performing the registration process for the UPF network element managed by the OAM device. It is easy to understand that when the configuration of the first interface information of the UPF network element managed by the OAM device changes, the UPF network element managed by the OAM device may also actively send the updated first interface information to the NRF network element again.
  • the NRF network element when the NRF network element discovers that a UPF network element is newly added to the network, such as a UPF network element that has just been powered on or performing a registration process, or when the NRF network element learns the first interface information of some UPF network elements During the change, if the NRF network element discovers that the UPF network element 2 that originally had the first interface with the UPF network element 1 is faulty or has been powered off, the NRF network element may also send an update instruction of the first interface information to the OAM device.
  • the NRF network element receives the first interface information of the UPF network element controlled by the at least one SMF network element sent by the at least one SMF network element.
  • the SMF network element can actively send the first interface information of the UPF network element controlled by the SMF network element to the NRF network element. It is easy to understand that when the configuration of the first interface information of the UPF network element controlled by the SMF network element changes, the SMF network element can also actively send the updated first interface information of the UPF network element controlled by the SMF network element to the NRF network element.
  • One interface information is easy to understand that when the configuration of the first interface information of the UPF network element controlled by the SMF network element changes.
  • the SMF network element when the SMF network element performs the UPF selection process shown in FIG. 3, if the SMF network element finds that the configuration of the first interface information of the candidate I-UPF network element and/or the candidate A-UPF network element is incorrect , The SMF network element can also actively send the correct first interface information to the NRF network element.
  • the AMF network element when the AMF network element executes the SMF network element selection process shown in FIG. 4, if the AMF network element finds a candidate I-SMF network element and/or a UPF network controlled by the candidate A-SMF network element If the configuration of the first interface information of the element is incorrect, the AMF network element may also notify the SMF network element of the UPF network element whose configuration information is incorrect, and send the correct first interface information to the NRF network element.
  • the NRF network element can perform the following steps:
  • the NRF network element saves the received first interface information of the UPF network element.
  • the NRF network element may store the received first interface information in the form of a configuration file or the like.
  • the NRF network element may establish a UPF configuration file for each UPF network element.
  • the NRF network element can create an SMF configuration file for each SMF network element, and the SMF configuration file is used to store the first one between all UPF network elements controlled by the SMF network element and the external UPF network element.
  • the first interface information of the UPF network element of the interface refers to a UPF network element that is not controlled by the SMF network element.
  • the aforementioned configuration file may also store the second interface information and the third interface information of the UPF network element.
  • the second interface information includes network information of the radio access network RAN to which each UPF network element is reachable, such as the equipment identification, IP address, equipment name, service area identification, etc. of the base station in the radio access network RAN.
  • the third interface information includes network information of the data network DN that is reachable by each UPF network element, such as the network identifier, IP address, and data server name of the data network.
  • the NRF network element may also use other file formats to store the aforementioned first interface information, second interface information, and third interface information, such as scripts, electronic forms, etc., which are not limited in this embodiment of the application.
  • S502 The NRF network element receives the first request.
  • the first request is used to obtain the first interface information of the candidate UPF network element among at least one UPF network element, or the first request is used to request to select a candidate UPF network element from at least one UPF network element, or the first The request is used to request the selection of a candidate session management function SMF network element according to the first interface information of at least one UPF network element.
  • the SMF network element may subscribe to the NRF network element the status change notification of the UPF network element controlled by the SMF network element.
  • the NRF network element can send the updated first interface information of the UPF network element to the SMF network element.
  • the SMF network element can also verify whether the received first interface information of the UPF network element is incorrect, and determine whether to send the verified first interface information to the NRF network element, so as to update the SMF network element stored in the NRF network element The first interface information of the UPF network element in the configuration file.
  • S503 The NRF network element sends a first response.
  • the first response carries the first interface information of the candidate UPF network element among at least one UPF network element, or the identifier of the candidate UPF network element, or the identifier of the candidate SMF network element.
  • the above communication method further includes: the SMF network element sends the above first request to the NRF network element. Then, the NRF network element receives the first request, and uses the content carried in the first request as a query condition, and searches the local cache of the NRF network element for candidate I-UPF network elements that meet the conditions, and/or candidate A-UPF network elements , And carry the queried candidate I-UPF network element and/or the candidate A-UPF network element in the first response and return it to the SMF network element so that the SMF network element can complete the UPF selection process.
  • the content carried by the first request and the content carried by the first response are illustrated as follows.
  • the candidate UPF network element may include a candidate intermediate user plane function I-UPF network element, and the candidate I-UPF network element is a UPF network element that has a second interface with the radio access network RAN that the terminal device accesses. Therefore, in a possible design method, the first request carries network information of the radio access network RAN that the terminal device accesses. Among them, the network information of the radio access network RAN that the terminal device accesses is used to query the first interface information of the candidate I-UPF network element. Correspondingly, the first response carries the first interface information of the candidate I-UPF network element. There is a second interface between the candidate I-UPF network element and the radio access network RAN.
  • the candidate UPF network element may include a candidate anchor user plane function A-UPF network element
  • the candidate A-UPF network element is a UPF network element that has a third interface with the data network DN to be accessed by the terminal device. Therefore, in another possible design method, the first request carries the network information of the data network DN to be accessed by the terminal device. The network information of the data network DN to be accessed by the terminal device is used to query the first interface information of the candidate A-UPF network element. Correspondingly, the first response carries the first interface information of the candidate A-UPF network element. There is a third interface between the candidate A-UPF network element and the data network DN.
  • the above two query methods for candidate UPF network elements can also be used in combination.
  • the query can be divided into two, and in the first query and the second query, the first request can respectively carry one of the following contents: network information of the radio access network RAN that the terminal device accesses, or the terminal device Network information of the accessed data network DN.
  • the first request sent by the SMF network element for the second time may also carry the first response carried in the first query.
  • the SMF network element may also carry the network information of the radio access network RAN accessed by the terminal device and the network information of the data network DN to be accessed by the terminal device in the first request sent in the same query request. Detailed descriptions are given below.
  • the candidate UPF network element may include a candidate intermediate user plane function I-UPF network element and a candidate anchor user plane function A-UPF network element, and the candidate I-UPF network element is a wireless access network connected to the terminal device.
  • the first request carries the first interface information of the candidate I-UPF network element
  • the first interface information of the candidate I-UPF network element is used to select from at least one UPF network element
  • the candidate I-UPF network element has the UPF network element of the first interface as the candidate A-UPF network element.
  • the first response carries the identifier of the candidate A-UPF network element.
  • the candidate UPF network element may include a candidate intermediate user plane function I-UPF network element and a candidate anchor user plane function A-UPF network element, where the candidate A-UPF network element is the one between the data network DN that the terminal device wants to access There is a UPF network element with a third interface in between. Therefore, in another possible design method, the first request carries the first interface information of the candidate A-UPF network element, and the first interface information of the candidate A-UPF network element is used to select from at least one UPF network element The UPF network element with the first interface between the candidate A-UPF network element and the candidate A-UPF network element serves as the candidate I-UPF network element. Correspondingly, the first response carries the identifier of the candidate I-UPF network element.
  • the candidate UPF network element may include a candidate intermediate user plane function I-UPF network element and a candidate anchor user plane function A-UPF network element. Therefore, in another possible design method, the first request carries network information of the radio access network RAN that the terminal device accesses and network information of the data network DN that the terminal device wants to access. Correspondingly, the first response carries the first interface information of the candidate I-UPF network element and the first interface information of the candidate A-UPF network element.
  • the candidate I-UPF network element is a UPF network element that has a second interface with the radio access network RAN that the terminal device accesses, and the candidate A-UPF network element is a data network DN that the terminal device wants to access. UPF network element of the third interface.
  • the NRF network element can use the content carried in the first request as a query condition, and query the content requested by the first request in the local cache of the NRF network element, and The query result is carried in the first response and returned to the SMF network element.
  • the NRF network element may query the local NRF network element based on the network information of the access network network element that the terminal device accesses carried in the first request, and/or the network information of the data network to be accessed by the terminal device
  • the first interface information of the candidate I-UPF network element and/or the candidate A-UPF network element stored in the form of a configuration file, electronic form, etc., and carried in the first response is returned to the SMF network element.
  • the communication method further includes: the AMF network element sends the first request to the NRF network element. Then, the NRF network element receives the first request, and uses the content carried in the first request as a query condition, and searches the local cache of the NRF network element for candidate I-SMF network elements that meet the conditions, and/or candidate A-SMF network elements And carry the queried candidate I-SMF network element and/or the candidate A-SMF network element in the first response and return it to the AMF network element so that the AMF network element can complete the SMF selection process.
  • the content carried by the first request and the content carried by the first response are illustrated as follows.
  • the candidate SMF network element may include a candidate intermediate session management function I-SMF network element, the UPF network element controlled by the candidate I-SMF network element exists between the UPF network element and the radio access network RAN that the terminal device accesses.
  • UPF network element of the interface UPF network element of the interface. Therefore, in a possible design method, the first request carries network information of the radio access network RAN that the terminal device accesses.
  • the first response carries the first interface information of the UPF network element controlled by the candidate I-SMF network element.
  • the candidate SMF network element may include a candidate anchor session management function A-SMF network element.
  • the UPF network elements controlled by the candidate A-SMF network element there is a UPF with a third interface between the DN of the data network to be accessed and the UPF network element.
  • Network element the first request carries the network information of the data network DN to be accessed by the terminal device.
  • the first response carries the first interface information of the UPF network element controlled by the candidate A-SMF network element.
  • the UPF network element controlled by the candidate A-SMF network element there is a UPF network element that has a third interface with the data network DN to be accessed by the terminal device.
  • the above two query methods for candidate SMF network elements can also be used in combination.
  • the query can be divided into two, and in the first query and the second query, the first request can respectively carry one of the following contents: network information of the radio access network RAN that the terminal device accesses, or the terminal device Network information of the accessed data network DN.
  • the first request sent by the AMF network element for the second time can also carry the first response carried in the first query.
  • the candidate I-SMF network element controls the first interface information of the UPF network element, or the candidate A-SMF network element controls the first interface information of the UPF network element.
  • the AMF network element may also carry the network information of the radio access network RAN accessed by the terminal device and the network information of the data network DN to be accessed by the terminal device in the first request sent in the same query request. Detailed descriptions are given below.
  • the candidate SMF network element may include a candidate intermediate session management function I-SMF network element and a candidate anchor session management function A-SMF network element.
  • the UPF network elements controlled by the candidate I-SMF network element are connected to the terminal device.
  • the first request carries the first interface information of the UPF network element controlled by the candidate I-SMF network element, and the first interface information of the UPF network element controlled by the candidate I-SMF network element is used
  • the candidate A-SMF network element is selected from at least one SMF network element, so that the UPF network element controlled by the candidate A-SMF network element and the UPF network element controlled by the candidate I-SMF network element have a first interface.
  • the first response carries the identifier of the candidate A-SMF network element.
  • the candidate SMF network element may include the candidate intermediate user plane function I-SMF network element and the candidate anchor session management function A-SMF network element.
  • the UPF network element controlled by the candidate A-SMF network element exists in the UPF network element required by the terminal device. There is a UPF network element of the third interface between the accessed data network DNs.
  • the first request carries the first interface information of the UPF network element controlled by the candidate A-SMF network element, and the first interface information of the UPF network element controlled by the candidate A-SMF network element It is used to select a subsequent I-SMF network element from at least one SMF network element so that there is a first interface between the UPF network element controlled by the candidate I-SMF network element and the UPF network element controlled by the candidate A-SMF network element.
  • the response carries the first interface information of the UPF network element controlled by the candidate I-SMF network element.
  • the candidate SMF network element may include a candidate intermediate user plane function I-SMF network element and a candidate anchor user plane function A-SMF network element. Therefore, in another possible design method, the first request carries network information of the radio access network RAN that the terminal device accesses and network information of the data network DN that the terminal device wants to access. Correspondingly, the first response carries the first interface information of the UPF network element controlled by the candidate I-SMF network element and the first interface information of the UPF network element controlled by the candidate A-SMF.
  • the UPF network elements controlled by the candidate I-SMF network element there are UPF network elements that have a second interface with the radio access network RAN that the terminal device accesses, and there are UPF network elements controlled by the candidate A-SMF network element There is a UPF network element with a third interface between it and the data network DN to be accessed by the terminal device.
  • the NRF network element can use the content carried in the first request as a query condition, and query the content requested by the first request in the local cache of the NRF network element, and The query result is carried in the first response and returned to the AMF network element.
  • the NRF network element may query the local NRF network element based on the network information of the access network network element that the terminal device accesses carried in the first request, and/or the network information of the data network to be accessed by the terminal device
  • the first interface information of the candidate I-SMF network element and/or the UPF network element controlled by the candidate A-SMF network element stored in the form of a configuration file, electronic form, etc., and carried in the first response is returned to the AMF network element.
  • the NRF network element can receive and uniformly manage the first interface information of at least one UPF network element, and when the NRF network element receives the first request sent by the SMF network element for selecting the UPF network element, The NRF network element may send the first response carrying the first interface information of the candidate UPF network element or the identifier of the candidate UPF network element to the SMF network element, so that the SMF network element can quickly select the target UPF network element, or when the NRF network element receives When the AMF network element sends the first request for selecting the SMF network element, the NRF network element may send to the AMF network element the first interface information of the UPF network element controlled by the candidate SMF network element or the candidate SMF network element control.
  • the first response to the identifier of the UPF network element so that the AMF network element can quickly select the target SMF network element, which can avoid the absence of the first interface between two or more UPF network elements of the SMF network element Xuzhou, and/or, There is no first interface between the UPF network elements controlled by two or more SMF network elements selected by the AMF network element, which leads to the situation that a normal session connection cannot be established, and multiple interactions can be reduced to select a suitable target UPF network
  • the signaling waste, resource waste and time waste caused by the element and/or the target SMF network element can improve the reliability and efficiency of the SMF network element selecting the UPF network element and/or the AMF network element selecting the SMF network element.
  • the actions of the SMF network element, AMF network element, and NRF network element involved in the communication method shown in any one of FIG. 3 to FIG. 6 can be performed by the processor in the communication device 200 shown in FIG. 2 201 calls the program code stored in the memory 203 to execute.
  • an embodiment of the present application also provides a communication device, which is used to implement the foregoing various communication methods.
  • the communication device may be the SMF network element, AMF network element, or NRF network element in the foregoing method embodiment, or a device containing the foregoing SMF network element, AMF network element, or NRF network element, or may be used for the foregoing SMF network element or AMF Network element or part of NRF network element.
  • the communication device includes hardware structures and/or software modules corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiments of the present application may divide the communication device into functional modules according to the foregoing method embodiments.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 7 is a schematic structural diagram of a communication device 700 provided by an embodiment of the application, which is used to perform the functions performed by the SMF network element in the communication method shown in FIG. 3.
  • the communication device 700 includes: a processing module 701 and a transceiver module 702.
  • the transceiver module 702 is used to obtain first control information and second control information.
  • the first control information includes first interface information of at least one candidate I-UPF network element
  • the second control information includes first interface information of at least one candidate A-UPF network element.
  • the processing module 701 is configured to determine, according to the first control information and the second control information, that a first interface exists between the first candidate I-UPF network element and the first candidate A-UPF network element.
  • the first candidate I-UPF network element is a user plane network element among at least one candidate I-UPF network element
  • the first candidate A-UPF network element is a user plane network element among at least one candidate A-UPF network element.
  • the processing module 701 is further configured to select the first candidate I-UPF network element and the first candidate A-UPF network element as target user plane network elements.
  • the first control information may include: at least one candidate I-UPF network element's first interface reachable UPF network element Internet Protocol IP address set; the second control information may include: at least one candidate The Internet Protocol IP address of the first interface of the A-UPF network element.
  • the determining module 702 is further configured to determine that the first interface of the first candidate A-UPF network element exists in the Internet Protocol IP address set of the UPF network element whose first interface of the first candidate I-UPF network element is reachable Internet Protocol IP address.
  • the first control information may include: the Internet Protocol IP address of the first interface of at least one candidate I-UPF network element; the second control information may include: the information of at least one candidate A-UPF network element The set of Internet Protocol IP addresses of UPF network elements reachable by the first interface.
  • the processing module 701 is further configured to determine whether the first interface of the first candidate I-UPF network element exists in the Internet Protocol IP address set of the UPF network element whose first interface is reachable Internet Protocol IP address.
  • the first control information may include: at least one candidate I-UPF network element's first interface reachable data center DC identification set; the second control information may include: at least one candidate A-UPF The ID of the data center DC where the network element is located.
  • the processing module 701 is further configured to determine that there is an identifier of the data center DC where the first candidate A-UPF network element is located in the identification set of the data center DC to which the first interface of the first candidate I-UPF network element is reachable .
  • the first control information may include: the identification of the data center DC where at least one candidate I-UPF network element is located; the second control information may include: the first control information of at least one candidate A-UPF network element A set of IDs of the data center DCs that are reachable by an interface.
  • the processing module 701 is further configured to determine that there is an identifier of the data center DC where the first candidate I-UPF network element is located in the identification set of the data center DC to which the first interface of the first candidate A-UPF network element is reachable .
  • the first control information may include: at least one candidate I-UPF network element's first interface reachable UPF network element identifier set; the second control information may include: at least one candidate A-UPF The identity of the network element.
  • the processing module 701 is further configured to determine that there is an identifier of the first candidate A-UPF network element in the identifier set of the UPF network element whose first interface is reachable by the first candidate I-UPF network element.
  • the first control information may include: the identification of at least one candidate I-UPF network element; the second control information may include: the UPF that the first interface of the at least one candidate A-UPF network element is reachable The identity collection of the network element.
  • the processing module 701 is further configured to determine that there is an identifier of the first candidate I-UPF network element in the identifier set of the UPF network element whose first interface is reachable by the first candidate A-UPF network element.
  • the first control information may include: at least one candidate I-UPF network element's first interface reachable UPF network element position set; the second control information may include: at least one candidate A-UPF The location of the network element.
  • the processing module 701 is further configured to determine the position of the first candidate A-UPF network element in the location set of the UPF network element that is reachable by the first interface of the first candidate I-UPF network element.
  • the first control information may include: the location of at least one candidate I-UPF network element; the second control information may include: the UPF that the first interface of the at least one candidate A-UPF network element can reach The location collection of network elements.
  • the processing module 701 is further configured to determine the position of the first candidate I-UPF network element in the set of positions of the UPF network element that is reachable by the first interface of the first candidate A-UPF network element.
  • the transceiver module 702 is also used for the SMF network element to obtain the first interface information of at least one candidate I-UPF network element from at least one candidate I-UPF network element or a network storage library function NRF network element, And obtain the first interface information of at least one candidate A-UPF network element from at least one candidate A-UPF network element or a network storage library function NRF network element.
  • the at least one candidate I-UPF network element may be a UPF network element that has a second interface with the radio access network RAN that the terminal device accesses; the at least one candidate A-UPF network element may be a UPF network element required by the terminal device. There is a UPF network element of the third interface between the accessed data network DNs.
  • the communication device 700 shown in FIG. 7 may also be used to perform the functions performed by the AMF network element in the communication method shown in FIG. 4.
  • the transceiver module 702 is configured to obtain the first interface information of the user plane function UPF network element controlled by at least one candidate intermediate session management function I-SMF network element and at least one candidate anchor session management function A-SMF The first interface information of the user plane function UPF network element controlled by the network element.
  • the processing module 701 is configured to determine at least one candidate I-SMF based on the first interface information of the UPF network element controlled by the at least one candidate I-SMF network element and the first interface information of the UPF network element controlled by the at least one candidate A-SMF network element -There is a first interface between the UPF network element controlled by the first candidate I-SMF network element among the SMF network elements and the UPF network element controlled by the first candidate A-SMF network element among the at least one candidate A-SMF network element.
  • the processing module 701 is configured to select the first candidate I-SMF network element and the first candidate A-SMF network element as the target SMF network element.
  • the third control information may include: the set of Internet Protocol IP addresses of the UPF network element that is reachable by the first interface of the UPF network element controlled by at least one candidate I-SMF network element; the fourth control information may It includes: the internet protocol IP address of the first interface of the UPF network element controlled by at least one candidate A-SMF network element.
  • the processing module 701 is further configured to determine that the first candidate A-SMF network element exists in the Internet Protocol IP address set of the UPF network element whose first interface is reachable by the UPF network element controlled by the first candidate I-SMF network element The Internet Protocol IP address of the first interface of the controlled UPF network element.
  • the third control information may include: the Internet Protocol IP address of the first interface of the UPF network element controlled by at least one candidate I-SMF network element; the fourth control information may include: at least one candidate A -The set of Internet Protocol IP addresses of the UPF network element that is reachable by the first interface of the UPF network element controlled by the SMF network element.
  • the processing module 701 is further configured to determine that the first candidate I-SMF network element exists in the Internet Protocol IP address set of the UPF network element whose first interface is reachable by the UPF network element controlled by the first candidate A-SMF network element The Internet Protocol IP address of the first interface of the controlled UPF network element.
  • the third control information may include: at least one candidate I-SMF network element controlled UPF network element of the first interface of the data center DC reachable identification set; the fourth control information may include: at least The identifier of the data center DC where the UPF network element controlled by a candidate A-SMF network element is located.
  • the processing module 701 is further configured to determine that there is a UPF controlled by the first candidate A-SMF network element in the ID set of the data center DC to which the first interface of the UPF network element controlled by the first candidate I-SMF network element is reachable The ID of the data center DC where the network element is located.
  • the third control information may include: the identification of the data center DC where the UPF network element controlled by at least one candidate I-SMF network element is located; the fourth control information may include: at least one candidate A- The ID set of the data center DC that is reachable by the first interface of the UPF network element controlled by the SMF network element.
  • the processing module 701 is further configured to determine that the UPF controlled by the first candidate I-SMF network element exists in the ID set of the data center DC to which the first interface of the UPF network element controlled by the first candidate A-SMF network element is reachable The ID of the data center DC where the network element is located.
  • the third control information may include: at least one candidate I-SMF network element controlled UPF network element of the first interface of the UPF network element reachable UPF network element identification set; the fourth control information may include: at least The identifier of a UPF network element controlled by a candidate A-SMF network element.
  • the processing module 701 is further configured to determine that the UPF controlled by the first candidate A-SMF network element exists in the identifier set of the UPF network element whose first interface is reachable by the UPF network element controlled by the first candidate I-SMF network element The identity of the network element.
  • the third control information may include: the identifier of the UPF network element controlled by at least one candidate I-SMF network element; the fourth control information may include: the UPF controlled by at least one candidate A-SMF network element A set of identifiers of UPF network elements that are reachable by the first interface of the network element.
  • the processing module 701 is further configured to determine that the UPF controlled by the first candidate I-SMF network element exists in the identifier set of the UPF network element whose first interface is reachable by the UPF network element controlled by the first candidate A-SMF network element The identity of the network element.
  • the third control information may include: a set of locations of UPF network elements that are reachable by the first interface of the UPF network element controlled by at least one candidate I-SMF network element; the fourth control information may include: at least The location of a UPF network element controlled by a candidate A-SMF network element.
  • the processing module 701 is further configured to determine that there is a UPF controlled by the first candidate A-SMF network element in the location set of the UPF network element that is reachable by the first interface of the UPF network element controlled by the first candidate I-SMF network element The location of the network element.
  • the third control information may include: the location of the UPF network element controlled by at least one candidate I-SMF network element; the fourth control information may include: the UPF controlled by at least one candidate A-SMF network element The location collection of UPF network elements reachable by the first interface of the network element.
  • the processing module 701 is further configured to determine that there is a UPF controlled by the first candidate I-SMF network element in the location set of the UPF network element that is reachable by the first interface of the UPF network element controlled by the first candidate A-SMF network element The location of the network element.
  • the transceiver module 702 is also used to obtain the first interface of the UPF network element controlled by the at least one candidate I-SMF network element from the network repository function NRF network element or at least one candidate I-SMF network element Information, and obtain the first interface information of the UPF network element controlled by at least one candidate A-SMF network element from the network repository function NRF network element or at least one candidate A-SMF network element.
  • the at least one candidate I-SMF network element may be: among the controlled UPF network elements, there is an SMF network element that has a UPF network element with a second interface between it and the radio access network RAN that the terminal device accesses; at least one The candidate A-SMF network element may be an SMF network element in which there is a UPF network element with a third interface between the controlled UPF network element and the data network DN to be accessed by the terminal device.
  • the communication device 700 may be the SMF network element in the communication method shown in FIG. 3 or a chip or chip system set in the SMF network element; or the communication device 700 may also be the communication shown in FIG. 4
  • the AMF network element in the method or the chip or chip system set in the AMF network element For the technical effects of the communication device 700, reference may be made to related descriptions of the technical effects of the method embodiments shown in FIG. 3 or FIG. 4, and details are not described herein again.
  • the communication device 700 shown in FIG. 7 may also be used to perform the functions performed by the NRF network element in the communication methods shown in FIG. 5 and FIG. 6.
  • the transceiver module 702 is configured to receive first interface information of at least one user plane function UPF network element.
  • the first interface information may include an identifier of a UPF network element that is reachable to each UPF network element in at least one UPF network element.
  • the processing module 701 is configured to save the first interface information received by the transceiver module 702.
  • the transceiver module 702 is also used to receive the first request.
  • the first request is used to obtain the first interface information of the candidate UPF network element among at least one UPF network element, or the first request is used to request to select a candidate UPF network element from at least one UPF network element, or the first The request is used to request the selection of a candidate session management function SMF network element according to the first interface information of at least one UPF network element.
  • the transceiver module 702 is also used to send a first response.
  • the first response carries the first interface information of the candidate UPF network element among at least one UPF network element, or the identifier of the candidate UPF network element, or the identifier of the candidate SMF network element.
  • the transceiver module 702 is also used to receive the first interface information sent by at least one UPF network element, and/or the transceiver module 702 is also used to receive at least one UPF sent by the OAM equipment
  • the first interface information of the network element, and/or the transceiver module 702 is further configured to receive the first interface information of the UPF network element controlled by at least one SMF network element sent by at least one SMF network element.
  • the candidate UPF network element may include a candidate intermediate user plane function I-UPF network element.
  • the first request carries network information of the radio access network RAN that the terminal device accesses.
  • the first response carries the first interface information of the candidate I-UPF network element, and there is a second interface between the candidate I-UPF network element and the radio access network RAN.
  • the candidate UPF network element may include the candidate anchor user plane function A-UPF network element.
  • the first request carries network information of the data network DN to be accessed by the terminal device.
  • the first response carries the first interface information of the candidate A-UPF network element, and a third interface exists between the candidate A-UPF network element and the data network DN.
  • the candidate UPF network element may include a candidate intermediate user plane function I-UPF network element and a candidate anchor user plane function A-UPF network element, and the candidate I-UPF network element may be a wireless access to the terminal device.
  • the first request carries the first interface information of the candidate I-UPF network element, and the first interface information of the candidate I-UPF network element is used to select the candidate I-UPF network element from at least one UPF network element.
  • the UPF network element where the UPF network element has the first interface is used as the candidate A-UPF network element.
  • the first response carries the identifier of the candidate A-UPF network element.
  • the candidate UPF network element may include the candidate intermediate user plane function I-UPF network element and the candidate anchor user plane function A-UPF network element, and the candidate A-UPF network element may be the data network DN that the terminal device wants to access.
  • the first request carries the first interface information of the candidate A-UPF network element, and the first interface information of the candidate A-UPF network element is used to select the candidate A from at least one UPF network element.
  • the UPF network element with the first interface between the UPF network elements is used as the candidate I-UPF network element.
  • the first response carries the identifier of the candidate I-UPF network element.
  • the candidate UPF network element may include a candidate intermediate user plane function I-UPF network element and a candidate anchor user plane function A-UPF network element.
  • the first request carries network information of the radio access network RAN that the terminal device accesses and network information of the data network DN that the terminal device wants to access.
  • the first response carries the first interface information of the candidate I-UPF network element and the first interface information of the candidate A-UPF network element.
  • the candidate I-UPF network element may be a radio access network connected to the terminal device.
  • a UPF network element with a second interface exists between RANs
  • the candidate A-UPF network element may be a UPF network element with a third interface between the DN of the data network to be accessed by the terminal device.
  • the candidate SMF network element may include a candidate intermediate session management function I-SMF network element.
  • the first request carries network information of the radio access network RAN that the terminal device accesses.
  • the first response carries the first interface information of the UPF network element controlled by the candidate I-SMF network element, and there is a second interface between the UPF network element controlled by the candidate I-SMF network element and the radio access network RAN.
  • the candidate SMF network element may include the candidate anchor session management function A-SMF network element.
  • the first request carries network information of the data network DN to be accessed by the terminal device.
  • the first response carries the first interface information of the UPF network element controlled by the candidate A-SMF network element, and there is a third interface between the UPF network element controlled by the candidate A-SMF network element and the data network DN to be accessed by the terminal device. interface.
  • the candidate SMF network element may include a candidate intermediate session management function I-SMF network element and a candidate anchor session management function A-SMF network element.
  • the UPF network elements controlled by the candidate I-SMF network element are connected to the terminal device.
  • the first request carries the first interface information of the UPF network element controlled by the candidate I-SMF network element
  • the first interface information of the UPF network element controlled by the candidate I-SMF network element is used to obtain information from at least One UPF network element selects the first UPF network element that has the first interface with the UPF network element controlled by the candidate I-SMF network element, and selects the candidate A-SMF network element from the SMF network elements that control the first UPF network element.
  • the first response carries the identifier of the candidate A-SMF network element.
  • the candidate SMF network element may include the candidate intermediate user plane function I-SMF network element and the candidate anchor session management function A-SMF network element.
  • the UPF network element controlled by the candidate A-SMF network element exists in the UPF network element required by the terminal device. There is a UPF network element of the third interface between the accessed data network DNs.
  • the first request carries the first interface information of the UPF network element controlled by the candidate A-SMF network element, and the first interface information of the UPF network element controlled by the candidate A-SMF network element is used for slave Select the second UPF network element with the first interface between the at least one UPF network element and the UPF network element controlled by the candidate A-SMF network element, and select the candidate I-SMF from the SMF network elements that control the second UPF network element Network element.
  • the first response carries the first interface information of the UPF network element controlled by the candidate I-SMF network element.
  • the candidate SMF network element may include a candidate intermediate user plane function I-SMF network element and a candidate anchor user plane function A-SMF network element.
  • the first request carries network information of the radio access network RAN that the terminal device accesses and network information of the data network DN that the terminal device wants to access.
  • the first response carries the first interface information of the UPF network element controlled by the candidate I-SMF network element and the first interface information of the UPF network element controlled by the candidate A-SMF network element.
  • UPF network element with a second interface between the UPF network element and the radio access network RAN that the terminal device accesses, and the UPF network element controlled by the candidate A-SMF network element has a difference with the data network DN that the terminal device wants to access.
  • UPF network element with a third interface in between.
  • transceiver module 702 may also be configured as a receiving module and a sending module, which are not limited in the embodiment of the present application.
  • the communication device 700 may be the NRF network element in the communication method shown in FIG. 5 and FIG. 6 or a chip or chip system provided in the NRF network element.
  • the communication device 700 reference may be made to related descriptions of the technical effects of the method embodiments shown in FIG. 5 and FIG. 6, which will not be repeated here.
  • the embodiment of the application provides a communication system.
  • the communication system includes multiple UPF network elements, one or more SMF network elements, AMF network elements, and NRF network elements.
  • the SMF network element can be used to execute the communication method shown in FIG. 3; the AMF network element can be used to execute the communication method shown in FIG. 4; the NRF network element can be used to execute the communication methods shown in FIG. 5 and FIG. 6.
  • the communication system may also include other devices or network elements that interact with the SMF network element in the communication method shown in FIG. 3, such as a UPF network element, which can be used to execute FIG. 3
  • a UPF network element which can be used to execute FIG. 3
  • the communication system may also include other devices or network elements that interact with the AMF network element in the communication method shown in FIG. 4, such as an SMF network element, which can be used to execute The functions performed by the I-SMF network element or the A-SMF network element in the communication method shown.
  • an SMF network element which can be used to execute The functions performed by the I-SMF network element or the A-SMF network element in the communication method shown.
  • the communication system may also include other devices or network elements that interact with the NRF network element in the communication method shown in FIG. 5 and FIG. 6, such as an SMF network element or an AMF network element.
  • the SMF The network element may be used to perform the functions performed by the SMF network element in the communication method shown in FIG. 5 and FIG. 6, and the AMF network element may be used to perform the functions performed by the AMF network element in the communication method shown in FIG. 5 and FIG.
  • the embodiment of the present application provides a computer-readable storage medium that stores instructions in the computer-readable storage medium, which when run on a computer, causes the computer to execute the communication method described in the foregoing method embodiment.
  • the embodiments of the present application provide a computer program product containing instructions.
  • the instructions run on a computer, the computer can execute the communication method described in the foregoing method embodiment.
  • the processor in the embodiments of the present application may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), and dedicated integration Circuit (application specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • Access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory Take memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).
  • the foregoing embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware, or any other combination.
  • the above-mentioned embodiments may be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions or computer programs.
  • the processes or functions described in the embodiments of the present application are generated in whole or in part.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more sets of available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium.
  • the semiconductor medium may be a solid state drive.
  • At least one refers to one or more, and “multiple” refers to two or more.
  • the following at least one item (a)” or similar expressions refers to any combination of these items, including any combination of a single item (a) or plural items (a).
  • at least one item (a) of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
  • the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, rather than corresponding to the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or conversational connection may be indirect coupling or conversational connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un dispositif de communication. La solution comprend les étapes suivantes consistant : à obtenir, par un élément de réseau de gestion de session, des premières informations de commande et des secondes informations de commande ; puis, en fonction des premières informations de commande et des secondes informations de commande, à déterminer, par l'élément de réseau de gestion de session, qu'il existe une première interface entre un premier élément de réseau plan utilisateur intermédiaire candidat et un premier élément de réseau plan utilisateur d'ancrage candidat ; et à sélectionner le premier élément de réseau plan utilisateur intermédiaire candidat et le premier élément de réseau plan utilisateur d'ancrage candidat en tant qu'éléments de réseau plan utilisateur cible. Les premières informations de commande comprennent des premières informations d'interface d'au moins un élément de réseau plan utilisateur intermédiaire candidat, les secondes informations de commande comprennent des premières informations d'interface d'au moins un élément de réseau plan utilisateur d'ancrage candidat ; le premier élément de réseau plan utilisateur intermédiaire candidat est un élément de réseau plan utilisateur dans au moins un élément de réseau plan utilisateur intermédiaire candidat, et le premier élément de réseau plan utilisateur d'ancrage candidat est un élément de réseau plan utilisateur dans au moins un élément de réseau plan utilisateur d'ancrage candidat. Le procédé décrit est approprié pour le processus de sélection d'éléments de réseau plan utilisateur ou d'éléments de réseau de gestion de session.
PCT/CN2020/095480 2019-06-11 2020-06-10 Procédé et dispositif de communication WO2020249032A1 (fr)

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