WO2019072188A1 - 消息交互的方法及装置及互操作功能 - Google Patents

消息交互的方法及装置及互操作功能 Download PDF

Info

Publication number
WO2019072188A1
WO2019072188A1 PCT/CN2018/109623 CN2018109623W WO2019072188A1 WO 2019072188 A1 WO2019072188 A1 WO 2019072188A1 CN 2018109623 W CN2018109623 W CN 2018109623W WO 2019072188 A1 WO2019072188 A1 WO 2019072188A1
Authority
WO
WIPO (PCT)
Prior art keywords
network
iwf
core network
network element
mme
Prior art date
Application number
PCT/CN2018/109623
Other languages
English (en)
French (fr)
Inventor
李志军
李振东
卢飞
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2019072188A1 publication Critical patent/WO2019072188A1/zh

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements, protocols or services for addressing or naming
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements, protocols or services for addressing or naming
    • H04L61/45Network directories; Name-to-address mapping
    • H04L61/4505Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
    • H04L61/4511Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/16Discovering, processing access restriction or access information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/14Reselecting a network or an air interface
    • H04W36/144Reselecting a network or an air interface over a different radio air interface technology
    • H04W36/1446Reselecting a network or an air interface over a different radio air interface technology wherein at least one of the networks is unlicensed

Definitions

  • the present application relates to the field of communications, for example, to a method and apparatus for message interaction and interoperability functions.
  • 5G Fifth Generation Partnership Project
  • 5G RAN 5G Radio Access Network
  • 5G Core 5G Core
  • UDM Unified Data Management
  • Access Management Function manages the requirements for users to access the network, and is responsible for terminal-to-network non-access stratum (NAS) signaling management and user mobility management functions. .
  • NAS terminal-to-network non-access stratum
  • UPF User Plane Function
  • PCF Policy Control Function
  • HSS Home Subscriber Server
  • SGW Serving Gateway
  • Packet Data Network Gateway It is an evolved Evolved Packet System (EPS) and a gateway of the external network of the system. It is responsible for IP address allocation, charging function, packet filtering, policy application, etc. of the terminal.
  • PCEF Policy and Charging Enforcement Function
  • FIG. 3 is a 4G according to the related art.
  • 4G and 5G interface protocols are different: In 5G systems, AMF and other core network functions (NF), such as AMF, SMF, UDM, use Service Based Interface (SBI) communication, SBI interface Based on the HTTP 2.0 protocol.
  • NF core network functions
  • SBI Service Based Interface
  • the MME and other core network elements such as the MME and the SGW, communicate using the GTP-C protocol. Since the 4G system has been used for many years, the MME is required to support the SBI serviced interface, which has a great impact on the MME and is difficult to implement.
  • the 5G system is completely new, all AMFs on the whole network are required to support GTP-C, and the workload is also large.
  • NFs network function network functions
  • SBI interface Service Based Interface
  • Each NF exposes several services (Services) for other NF calls.
  • the service interface uses HTTP2.0 as the interface protocol, and the interface cells are encapsulated in JSON mode.
  • AMF provides a serviced interface called Namf, which is implemented using the HTTP protocol.
  • the network element/network function selection method is different: in the 4G system, the MME selects the MME, the SGW, and the PGW based on the Domain Name System (DNS).
  • DNS Domain Name System
  • the NF Repository Function is introduced to provide an SBI service interface to implement registration and discovery of NF and NF services.
  • the choice of AMF in 5G through DNS has a huge workload for the DNS system configuration, and it cannot provide the same rich selection conditions as 5G.
  • it is difficult for the MME to support the SBI serviced interface it is also difficult for the MME to select the AMF from the NRF.
  • the embodiment of the present application provides a method and device for message interaction, and an interoperation function, which avoids the situation that the complexity of the interoperability technologies of the two mobile communication networks is high in the related art.
  • a method for message interaction is provided, which is applied to a user equipment (UE) to switch or access a network across a network between a fourth generation 4G network and a fifth generation 5G network, including: An Inter-Working Function (IWF) receives an interaction message transmitted by the source core network control network element; the IWF selects a target core network control network element for the UE; and the IWF sends the interaction message to the The target core network controls the network element, wherein the source core network control network element and the target core network control network element are network functions in different generations of mobile communication systems.
  • IWF Inter-Working Function
  • a device for message interaction which is applied to a user terminal UE to switch or access a network across a network between a fourth generation 4G network and a fifth generation 5G network, including: a receiving module, The receiving module is configured to receive an interaction message transmitted by the source core network control network element, and the selecting module is configured to select a target core network control network element for the UE, and the sending module is configured to send the interaction message to the target core network control network.
  • the source core network control network element and the target core network control network element are network functions in different generation mobile communication systems.
  • an interworking function IWF is further provided, which is applied to a user terminal UE to switch an access network across a network between a fourth generation 4G network and a fifth generation 5G network, including: a processor and And a memory storing a program, wherein the processor is configured to read the program from the memory, and run the program to: receive an interaction message transmitted by a source core network control network element; Selecting a target core network control network element; sending the interaction message to the target core network control network element, where the source core network control network element and the target core network control network element are in different generations of mobile communication systems Network function.
  • a storage medium comprising a stored program, wherein the program is executed to perform the method described in any of the above embodiments.
  • processor being arranged to run a program, wherein the program is executed to perform the method described in any of the above embodiments.
  • FIG. 1 is a schematic structural diagram of a 5G system in the related art
  • FIG. 2 is a schematic structural diagram of a 4G system in the related art
  • FIG. 3 is a schematic diagram of a 4G and 5G system switching through an N26 interface in the related art
  • FIG. 5 is a system architecture diagram of an embodiment of the present application.
  • FIG. 6 is a schematic flow chart of an exemplary embodiment 1 of the present application.
  • FIG. 7 is a schematic flow chart of an exemplary embodiment 2 of the present application.
  • FIG. 9 is a schematic flow chart of an exemplary embodiment 4 of the present application.
  • FIG. 10 is a schematic flow chart of an exemplary embodiment 5 of the present application.
  • FIG. 11 is a schematic flow chart of an exemplary embodiment 6 of the present application.
  • the solution in the embodiment of the present application can be applied to interoperability between a 4G communication system and a 5G communication system, for example, the terminal switches between the two and accesses a certain network. It should be noted that the operating environment of the above information transmission method provided in the embodiment of the present application is not limited to the foregoing network architecture.
  • FIG. 4 is A flowchart of a method for message interaction according to an embodiment of the present application, as shown in FIG. 4, the flow includes steps S402 and S404.
  • step S402 the interoperation function IWF receives the interaction message transmitted by the source core network control network element; the IWF selects the target core network control network element for the UE.
  • step S404 the IWF sends the interaction message to the target core network control network element, where the source core network control network element and the target core network control network element are network functions in different generations of mobile communication systems.
  • the interworking function IWF receives the interaction message transmitted by the source core network control network element;
  • the IWF selects a target core network control network element for the UE;
  • the IWF sends the interaction message to the target core network control network element.
  • the source core network controls the interaction message transmitted by the network element as a source interface interaction message
  • the IWF sends the interaction message to the target core network control network element
  • the method further includes: the IWF is the source
  • the interface interaction message is converted into a target interface interaction message corresponding to the target core network control network element.
  • the source core network control network element is a mobility management network element MME in the 4G network
  • the source interface interaction message is an S10 interface message
  • the target core network control network element is an access management function in the 5G network.
  • AMF the target interface interaction message is an N26 or N14 interface message.
  • the IWF selects a target core network control network element for the UE, and the IWF sends a network function discovery request to the network function information database NRF, and carries information indicating that the network function to be discovered is AMF;
  • the IWF accepts the network function discovery response returned by the NRF, and selects the AMF from the AMF list in the network function discovery response as the target core network control network element.
  • the network function discovery request carries the Network Slicing Selection Assistance Information (NSSAI), and the NSSAI is obtained by sending the authentication request to the unified data management function UDM.
  • NSSAI Network Slicing Selection Assistance Information
  • the IWF obtains the UE type from the interaction message transmitted by the MME, and maps to the NSSAI according to the UE type; the IWF obtains from the interaction message transmitted by the MME
  • DCN ID Dedicated Core Network Identity
  • the IWF sends a network function discovery request to the network function information base NRF, including: the IWF acquiring the UE type according to the interaction message transmitted by the MME; the IWF sending the network function discovery request to the NRF, and Carry the UE type.
  • the IWF selects a target core network control network element for the UE, and the IWF sends a DNS query request to the domain name system DNS server, and carries information indicating that the network element to be discovered is the MME; the IWF receives the The DNS query response returned by the DNS server selects the MME as the target access management function from the MME list in the DNS query response.
  • the DNS query request carries a UE type
  • the UE type is obtained by one of the following methods: the IWF sends an authentication request to the home user data server HSS, and obtains the UE type from the authentication response returned by the HSS.
  • the IWF obtains network slice selection assistance information NSSAI from the interaction information transmitted by the AMF, and maps the NSSAI to the UE type.
  • the method before the interworking function IWF receives the interaction message transmitted by the source core network control network element, the method further includes: the source core network control network element determines, according to the local preset network policy, that the control is performed to the target core network via the IWF.
  • the network element transmits an interactive message; the source core network controls the network element to obtain an IWF for forwarding the interactive message.
  • the source core network control network element determines the IWF by using at least one of the following manners: obtaining the IWF from local configuration data; and obtaining the IWF from a DNS server query.
  • the method further includes: the IWF locally storing at least the source core network control network element and the target core network control network element corresponding to the UE.
  • the source core network controls the interaction message transmitted by the network element to include one of the following: a forward reassignment request, and a UE context request.
  • FIG. 5 is a system architecture diagram according to an embodiment of the present application.
  • the application adds 5G Interworking (5G-IWF) network function to the system in comparison with related technologies; 5G-IWF
  • 5G-IWF 5G Interworking
  • the MME communicates with the 4G system through the S10 interface.
  • the S10 interface is used for mutual communication between MMEs; the 5G-IWF communicates with the AMF in the 5G system through the N14 (or N26) interface.
  • the N14 interface is set to communicate with each other between the AMFs
  • the N26 interface is set to communicate with each other between the AMF and the MME in the 4G system
  • the 5G-IWF is set to the UE through the Nnrf interface and the NRF communication in the 5G system. Choose the right AMF.
  • the 5G-IWF can also be used to obtain the UE subscription data in the 4G system by using the S6a interface and the HSS communication in the 4G system.
  • the 5G-IWF communicates with the UDM in the 5G system through the N8 interface to obtain the UE subscription data in the 5G system.
  • the 5G-IWF provides some functions of the MME and the AMF, and acts as a two-way proxy for the MME and the AMF, providing the following functions:
  • the 5G-IWF acts as the MME and provides the S10 interface communication function.
  • the 5G-IWF When communicating with AMF in a 5G network, the 5G-IWF acts as an AMF and provides N14 interface communication. Alternatively, when communicating with the AMF in the 5G network, the 5G-IWF acts as the MME role of the 4G network, and the MME supports the N26 interface communication function.
  • the 5G-IWF is the MME that selects the AMF in the 5G network.
  • the 5G-IWF can be mapped to the Network Slicing Select Assistance Information (NSSAI) in the 5G network according to the UE Type (UE Usage Type) or the proprietary core network identifier (DCN ID) provided by the MME, and used.
  • NSSAI initiates NF discovery to the NRF to select AMF.
  • the 5G-IWF may also use the UE Type (UE Usage Type) or the proprietary Core Network Identity (DCN ID) provided by the MME to initiate NF discovery to the NRF to select the AMF.
  • the 5G-IWF may also acquire the network slice selection assistance information NSSAI from the HSS/UDM, and use the acquired network slice selection assistance information NSSAI to initiate NF discovery to the NRF to select the AMF.
  • 5G-IWF selects MME for AMF in 4G network.
  • the 5G-IWF may map the auxiliary information NSSAI according to the network fragment provided by the AMF into a UE Usage Type in the 4G network, and use the UE type to initiate a DNS query to the DNS server to select the MME.
  • the 5G-IWF may also obtain the UE Usage Type from the HSS/UDM and initiate a DNS query to the DNS to select the MME using the acquired UE Type (UE Usage Type).
  • the 5G-IWF converts the S10 interface message sent by the MME into an N14 (or N26) interface message and forwards it to the AMF.
  • the N14 (or N26) interface message sent by the AMF is converted into an S10 interface message and forwarded to the MME.
  • FIG. 6 is a schematic flowchart of the first embodiment of the present application. As shown in FIG. 6, the flow of signaling from the 4G to the 5G via the 5G-IWF is shown when the UE moves from the 4G network coverage to the 5G network coverage.
  • the process is applicable to the process of signaling from the MME to the AMF, for example, a process in which the UE initiates a handover after the connection state moves from 4G to 5G, and a process in which the UE initiates a TAU after moving from 5G to 4G in an idle state.
  • the 5G-IWF When the 5G-IWF receives the interactive message sent by the MME to the AMF, the 5G-IWF performs one of the following judgments:
  • the 5G-IWF selects an appropriate AMF for the UE, and the S10 interface interacts with the message.
  • the interactive message converted to the N26 (or N14) interface is forwarded to the AMF selected by the 5G-IWF.
  • the 5G-IWF converts the interaction message of the S10 interface into an interaction message of the N26 (or N14) interface, and forwards the message to the AMF specified by the MME.
  • the 5G-IWF If the 5G-IWF stores the MME and AMF information of the UE locally, the 5G-IWF converts the interactive message of the S10 interface into an interactive message of the N26 (or N14) interface, and forwards the message to the AMF stored by the 5G-IWF.
  • FIG. 6 includes steps S601 to S610.
  • step S601 in order to send an interactive message to the AMF, according to the local network policy, the MME selects a 5G-IWF to forward the interactive message to the AMF.
  • the MME sends an interactive message to the AMF, which may be the following message: Forward Relocation Request/Response, UE Context Request/Response Wait.
  • the MME can select the 5G-IWF by:
  • a) Select from the local configuration data In the network policy, you can configure at least one 5G-IWF. When configuring multiple 5G-IWFs, you can also configure the 5G-IWF selection policy. For example, select 5G-IWF according to the location area. .
  • the 5G-IWF can be obtained from the DNS system query according to the full domain name FQDN of the 5G-IWF.
  • step S602 the MME sends an interaction message to the 5G-IWF that is an S10 interface.
  • the MME may carry a target radio access type (RAT) when transmitting the interaction information of the S10 interface.
  • RAT target radio access type
  • the target RAT is set to a new radio access type (New RAT, NR).
  • the MME may carry a UE Type (UE Usage Type) or a proprietary core network identifier (DCN ID) when transmitting the interaction information of the S10 interface.
  • UE Type UE Usage Type
  • DCN ID proprietary core network identifier
  • the MME may carry the target AMF information when transmitting the interaction information of the S10 interface.
  • the 5G-IWF After the 5G-IWF receives the interaction message of the S10 interface sent by the MME, if the AMF information is included in the interaction message, the 5G-IWF skips the steps S603-S606 and directly executes step S607.
  • step S603 the 5G-IWF determines that it is necessary for the UE to select an appropriate AMF in the 5G network;
  • the 5G-IWF uses one or a combination of the following methods to determine that it is necessary to select an appropriate AMF for the UE:
  • the 5G-IWF determines, according to the handover request message, that the UE does not allocate the AMF in the 5G network, and then selects an appropriate AMF for the UE.
  • the UE should select an appropriate AMF.
  • step S609 is directly performed by skipping steps S604-S608.
  • the 5G-IWF determines whether to obtain the network slice selection information NSSAI from the UDM according to one of the following conditions:
  • the 5G-IWF obtains the network slice selection assistance information NSSAI from the UDM.
  • the 5G-IWF maps the UE type to the network slice selection assistance information NSSAI, and the 5G-IWF does not acquire the network slice selection assistance information NSSAI from the UDM.
  • the 5G-IWF maps the proprietary core network identifier (DCN ID) to the network slice selection assistance information NSSAI, and the 5G-IWF does not The network slice selection assistance information NSSAI is obtained from the UDM.
  • step S605 the UDM returns an authentication response to the 5G-IWF, carrying the network slice selection assistance information NSSAI.
  • step S606 the 5G-IWF sends an NF discovery request to the NRF indicating that the NF type to be discovered is AMF.
  • the 5G-IWF carries the network slice selection assistance information NSSAI in the NF discovery request.
  • the network slice selection auxiliary information may be obtained by the 5G-IWF from the UDM, or may be obtained according to the UE type (UE Usage Type) or the proprietary core network identifier (DCN ID) provided by the MME.
  • the NRF can allocate the AMF to the UE according to the network slice selection assistance information provided by the 5G-IWF.
  • the 5G-IWF carries the UE Usage Type in the NF discovery request.
  • the UE type may be obtained by the 5G-IWF from an interactive message sent by the MME.
  • the NRF can also allocate the AMF to the UE according to the UE type provided by the 5G-IWF.
  • step S607 the NRF returns an NF discovery response to the 5G-IWF, carrying the AMF list.
  • step S608 the 5G-IWF selects an appropriate AMF for the UE according to the AMF list returned by the NRF.
  • step S610 after the 5G-IWF selects an appropriate AMF for the UE, the 5G-IWF may locally store the MME and AMF information of the UE to correctly forward subsequent interaction messages between the MME and the AMF.
  • FIG. 7 is a schematic flowchart of the second embodiment of the present application. As shown in FIG. 7, the process of signaling from the AMF to the MME through the 5G-IWF is shown when the UE moves from the 5G network coverage to the 4G network coverage.
  • This procedure is applicable to the process of signaling from the MME to the AMF.
  • the UE initiates a handover process after the connection state moves from 4G to 5G, and the UE initiates a TAU process after moving from 5G to 4G in an idle state.
  • the 5G-IWF when the 5G-IWF receives the interaction message sent by the AMF to the MME, the 5G-IWF performs one of the following judgments:
  • the 5G-IWF selects an appropriate MME for the UE, and the N26 is selected.
  • the interactive message of the (or N14) interface is converted into an interactive message of the S10 interface, and forwarded to the MME selected by the 5G-IWF.
  • the 5G-IWF converts the interactive message of the N26 (or N14) interface into an interactive message of the S10 interface, and forwards it to the AMF.
  • the 5G-IWF If the 5G-IWF stores the MME and AMF information of the UE locally, the 5G-IWF converts the interactive message of the N26 (or N14) interface into an interactive message of the S10 interface, and forwards the message to the MME stored by the 5G-IWF.
  • FIG. 7 includes steps S701 to S710.
  • step S701 in order to send an interactive message to the MME, according to the local network policy, the AMF selects a 5G-IWF to forward the interactive message to the MME.
  • AMF can obtain 5G-IWF information through local configuration data or DNS.
  • step S702 the AMF sends an interactive message to the 5G-IWF that is an N26 (or N14) interface.
  • the AMF may carry the target RAT when transmitting the interaction information of the N14 (or N26) interface.
  • the target RAT is set to EUTRAN.
  • the AMF may carry the network slice selection assistance information NSSAI when transmitting the interaction information of the N14 (or N26) interface.
  • the AMF may carry the target MME information when transmitting the interaction information of the N14 (or N26) interface.
  • the 5G-IWF After the 5G-IWF receives the interactive message of the N26 (or N14) interface sent by the AMF, if the MME information is included in the interaction message, the 5G-IWF skips the steps S703-S706 and directly executes step S707.
  • step S703 the 5G-IWF determines that it is necessary for the UE to select a suitable MME in the 4G network.
  • the 5G-IWF uses one or a combination of the following methods to determine that it is necessary to select an appropriate MME for the UE:
  • the 5G-IWF determines that the UE does not allocate the MME in the 4G network according to the handover request message, and should select an appropriate MME for the UE.
  • the UE should select an appropriate MME.
  • step S709 if the MME and AMF information of the UE are stored on the 5G-IWF, the 5G-IWF uses the stored MME information, and directly performs step S709 by skipping steps S604-S608.
  • step S704 the 5G-IWF initiates an authentication request to the HSS, and uses the authentication request to acquire the UE Usage Type configured in the UE subscription data.
  • the 5G-IWF determines whether to acquire the UE type from the HSS according to one of the following conditions:
  • the 5G-IWF maps the network slice selection assistance information NSSAI to the UE type, and the 5G-IWF does not acquire the UE type from the HSS. .
  • step S705 the UDM returns an authentication response to the 5G-IWF, carrying the UE type.
  • step S706 the 5G-IWF sends a DNS query request to the DNS server, and uses the full domain name FQDN of the MME to request to find a suitable MME.
  • the 5G-IWF carries the UE type in the DNS query request.
  • the UE type which may be obtained by the 5G-IWF from the HSS, or obtained according to the network slice selection assistance information NSSAI provided by the AMF.
  • step S708 the 5G-IWF selects an appropriate MME for the UE according to the MME list returned by the DNS server.
  • step S709 the 5G-IWF converts the interaction message of the N26 (or N14) interface sent by the AMF into an interaction message of the S10 interface, and forwards the converted interaction message to the AMF.
  • step S710 after the 5G-IWF selects an appropriate MME for the UE, the 5G-IWF may locally store the MME and AMF information of the UE, so as to correctly forward subsequent interaction messages between the MME and the AMF.
  • FIG. 8 includes steps S80 to S815.
  • step S801 in the idle state (IDLE state), the UE moves from the 4G coverage to the 5G coverage, triggering the registration process in the 5G network.
  • the UE If the UE previously only camped on and accesses the 4G network, the UE initiates an Initial Registration request to the 5G network.
  • step S802 the UE initiates an initial registration request to the target base station 5G-AN, carrying a subscription permanent identifier (SUPI), and a temporary identifier that is allocated when the UE accesses the 4G network.
  • SUPI subscription permanent identifier
  • the SUPI is usually the IMSI, and the temporary identifier that is allocated when the UE accesses the 4G network, that is, the Globally Unique Temporary Identity (GUTI) allocated by the MME to the UE.
  • GUI Globally Unique Temporary Identity
  • the GUTI allocated in the 4G network is referred to as 4G GUTI
  • the GUTI allocated in the 5G network is referred to as 5G GUTI.
  • step S803 after receiving the registration request of the UE, the 5G-AN selects an appropriate AMF for the UE.
  • the 5G-AN selects an appropriate AMF for the UE according to the information provided by the UE, such as the slice network selection assistance information NSSAI, the current location information of the UE, and the like.
  • step S804 the 5G AN sends a registration request to the AMF.
  • step S805 after receiving the registration request, the AMF determines that the UE context needs to be acquired by the 5G-IWF to the MME.
  • the AMF determines that the UE previously accesses the 4G network according to the 4G GUTI provided by the UE, and therefore needs to acquire the UE context from the MME previously accessed by the UE. Moreover, the AMF judges the interaction between the AMF and the MME according to the local network policy, and must pass the 5G-IWF. AMF chooses 5G-IWF according to the local network policy.
  • step S806 the AMF sends a UE context request to the MME via the 5G-IWF.
  • step S807 the MME returns a UE context response to the AMF via the 5G-IWF, where the context data of the UE is carried.
  • step S808 the AMF sends a UE context confirmation to the MME via the 5G-IWF.
  • step S810 the AMF sends a PDU session establishment request to the SMF/UPF, requesting to create a corresponding PDU connection and QoS flow for the UE.
  • step S811 the SMF/UPF establishes a corresponding PDU connection and QoS flow for the UE, and returns a PDU session establishment response to the AMF.
  • step S812 the AMF sends an AMF registration request to the UDM.
  • step S813 the UDM processes the registration request of the AMF and returns an AMF registration response.
  • step S815 the 5G-AN forwards the registration response to the UE.
  • FIG. 9 is a schematic flowchart of the fourth embodiment of the present application. As shown in FIG. 9, the flow of the Tracking Area Update (TAU) is initiated when the UE moves from the 5G network coverage to the 4G network coverage in the idle state. .
  • TAU Tracking Area Update
  • FIG. 9 includes steps S901 to S915.
  • step S901 in the idle state (IDLE state), the UE moves from the 5G coverage to the 4G coverage, triggering the TAU flow in the 4G network.
  • the eNodeB selects an appropriate MME for the UE according to the information of the UE, such as the terminal type, the UE location information, and the like.
  • step S904 the eNodeB sends a registration request to the MME.
  • step S905 after receiving the TAU request, the MME determines that the UE context needs to be acquired by the 5G-IWF to the AMF.
  • the MME determines that the UE previously accesses the 5G network according to the 5G GUTI provided by the UE, and therefore needs to acquire the UE context from the AMF accessed by the previous UE. Moreover, the MME determines the interaction between the MME and the AMF according to the local network policy, and must pass through the 5G-IWF. The MME selects the 5G-IWF according to the local network policy.
  • step S906 the MME sends a UE context request to the AMF via the 5G-IWF.
  • step S907 the AMF returns a UE context response to the MME via the 5G-IWF, where the context data of the UE is carried.
  • step S909 the MME selects an appropriate SGW and PGW for the UE.
  • the MME determines, according to the UE context data acquired from the MME, which PDN connection should be established for the UE, and the current location of the UE, etc., and selects an appropriate SGW and PGW for the UE to create a corresponding UE for the UE in the 4G network.
  • PDN connection and EPS bearer are examples of PDN connection and EPS bearer.
  • step S910 the MME sends a PDN session establishment request to the SGW/PGW, requesting to create a corresponding PDN connection and an EPS bearer for the UE.
  • step S911 the SGW/PGW establishes a corresponding PDN connection and an EPS bearer for the UE, and returns a PDN session establishment response to the MME.
  • step S912 the MME sends a location update request to the HSS.
  • step S913 the HSS processes the location update request of the MME, and returns a location update response.
  • step S914 the MME returns a TAU response to the eNodeB.
  • the process of initiating handover from the 4G network to the 5G network when the UE moves from the 4G network coverage to the 5G network coverage in the connected state is shown.
  • step S1002 the source base station eNodeB transmits a handover request (Handover Required) to the source MME.
  • step S1003 after receiving the handover request, the MME determines that the handover needs to be initiated to the 5G network through the 5G-IWF.
  • the MME determines the interaction between the AMF and the MME according to the local network policy, and must pass the 5G-IWF.
  • the MME selects the 5G-IWF according to the local network policy.
  • the 5G-IWF selects an appropriate AMF for the UE according to the information of the UE (such as the UE type, the current location information of the UE) and other conditions.
  • step S1008 the 5G-IWF sends a forward transfer re-allocation request to the AMF, where the information carries 4G GUTI, UE context, and the like.
  • step S1009 the AMF sends a handover request (Handover Request) to the target base station 5G-AN, requesting the 5G-AN to reserve resources for the handover.
  • a handover request Handover Request
  • step S1013 the eNodeB sends a handover command (Handover Command) to the UE, requesting the UE to switch radio resources.
  • a handover command Handover Command
  • step S1014 the UE completes the handover of the radio resource and transmits a handover acknowledgement (Handover Confirm) to the target base station 5G-AN.
  • a handover acknowledgement Handover Confirm
  • step S1015 the 5G-AN sends a Handover Notify message to the AMF.
  • the AMF determines, according to the UE context data acquired from the MME, what PDU connection should be established for the UE, and accordingly selects an appropriate SMF/UPF for the UE to create a corresponding PDU connection for the UE in the 5G network. QoS flow.
  • step S1019 the AMF sends a PDU session establishment request to the SMF/UPF, requesting to create a corresponding PDU connection and QoS flow for the UE.
  • step S1021 after triggering the wireless handover, the UE initiates a Registration Procedure in 5G, and the AMF processes the registration procedure of the UE.
  • step S1022 the source MME initiates a UE context release (UE Context Release) to the source base station eNodeB.
  • UE context release UE Context Release
  • step S1024 the source MME triggers the SGW/PGW to release the EPS bearer and PDN connection allocated for the UE.
  • FIG. 11 is a schematic flowchart of the sixth embodiment of the present application. As shown in FIG. 11, the process of initiating handover from a 5G network to a 4G network when the UE moves from a 5G network coverage to a 4G network coverage in a connected state is shown.
  • FIG. 11 includes steps S1101 through S1124.
  • step S1102 the source base station 5G-AN transmits a handover request (HandoverRequired) to the source AMF.
  • step S1103 after receiving the handover request, the AMF determines that the handover needs to be initiated to the 4G network through the 5G-IWF.
  • the AMF judges the interaction between the AMF and the MME according to the local network policy, and must pass the 5G-IWF.
  • AMF chooses 5G-IWF according to the local network policy.
  • step S1104 the AMF sends a forward relocation request (Forward Relocation Request) to the 5G-IWF, which carries information such as 5G GUTI and UE context.
  • a forward relocation request (Forward Relocation Request) to the 5G-IWF, which carries information such as 5G GUTI and UE context.
  • step S1105 the AMF sends a DNS query request to the DNS server, requests discovery of the MME, and selects an appropriate MME according to the MME list returned by the DNS server.
  • step S1108 the 5G-IWF sends a forward re-allocation request to the MME, which carries information such as 5G GUTI, UE context, and the like.
  • step S1109 the MME sends a handover request (Handover Request) to the target base station eNodeB, and requests the eNodeB to make a resource reservation for the handover.
  • Handover Request a handover request
  • step S1110 the eNodeB reserves resources for handover and returns a handover response (Handover Response) to the MME.
  • step S1111 the MME transmits a forward relocation response (Forward Relocation Response) to the AMF via the 5G-IWF.
  • a forward relocation response Forward Relocation Response
  • step S1112 the source AMF sends a handover command (HO Command) to the source base station 5G-AN.
  • HO Command handover command
  • step S1113 the 5G-AN sends a handover command (Handover Command) to the UE, requesting the UE to switch the radio resource.
  • a handover command Handover Command
  • step S1114 the UE completes the handover of the radio resource and transmits a handover acknowledgement (Handover Confirm) to the target base station eNodeB.
  • a handover acknowledgement Handover Confirm
  • step S1115 the eNodeB sends a Handover Notify message to the MME.
  • step S1117 the AMF sends a forward relocation complete acknowledgement (Forward Relocation Complete Ack) message to the MME via the 5G-IWF.
  • a forward relocation complete acknowledgement Forward Relocation Complete Ack
  • step S1118 the MME selects an appropriate SGW and PGW for the UE.
  • the MME determines, according to the UE context data acquired from the AMF, which PDN connection should be established for the UE, and accordingly selects a suitable SGW/PGW for the UE to create a corresponding PDN connection for the UE in the 4G network.
  • EPS bearer
  • step S1119 the MME sends a PDN session establishment request to the SGW/PGW, requesting to create a corresponding PDN connection and an EPS bearer for the UE.
  • step S1120 the SGW/PGW establishes a corresponding PDN connection and EPS bearer for the UE, and returns a PDN session establishment response to the MME.
  • step S1111 after triggering the wireless handover, the UE initiates a TAU procedure in 4G, and the MME processes the TAU procedure of the UE.
  • step S1122 the source AMF initiates a UE context release (UE Context Release) to the source base station 5G-AN.
  • UE context release UE Context Release
  • step S1123 the 5G-AN releases the resource previously allocated to the UE, and transmits a UE Context Release Ack to the source AMF.
  • step S1124 the source AMF triggers the SMF/UPF to release the PDU session allocated for the UE.
  • portions of the technical solution of the present application may be embodied in the form of a software product stored in a storage medium such as a Read Only Memory/Random Access Memory (ROM). /RAM), a disk, an optical disk, including a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the method described in each embodiment of the present application.
  • a storage medium such as a Read Only Memory/Random Access Memory (ROM). /RAM), a disk, an optical disk, including a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the method described in each embodiment of the present application.
  • a device for message interaction is provided, and the device is configured to implement the foregoing embodiments and implementation manners, and details are not described herein.
  • the term "module” may implement a combination of at least one of software and hardware for a predetermined function.
  • the apparatus described in the following embodiments may be implemented in software, but hardware, or a combination of software and hardware, is also possible and conceivable.
  • a device for message interaction which is applied to a user terminal UE to switch or access a network across a network between a fourth generation 4G network and a fifth generation 5G network, including:
  • the receiving module is configured to receive an interaction message transmitted by the source core network control network element
  • an interworking function IWF is further provided, which is applied to a user terminal UE to switch an access network across a network between a fourth generation 4G network and a fifth generation 5G network, including: a processor and And a memory storing the program, wherein the processor is configured to read the program from the memory, and run the program to: receive an interaction message transmitted by a source core network control network element; select for the UE The target core network controls the network element; the interaction message is sent to the target core network control network element, where the source core network control network element and the target core network control network element are network functions in different generations of mobile communication systems.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above multiple modules are The form of any combination is located in a different processor.
  • a storage medium comprising a stored program, wherein the program is executed to perform the method described in any of the above embodiments.
  • each of the above-described modules or steps of the present application can be implemented by a general-purpose computing device, which can be centralized on a single computing device or distributed over a network of multiple computing devices. on. They may be implemented in program code executable by a computing device such that they may be stored in a storage device for execution by the computing device. In some cases, the steps shown or described may be performed in a different order than the ones described herein, which may be separately fabricated into a plurality of integrated circuit modules, or a plurality of modules or steps thereof may be fabricated as a single integration. The circuit module is implemented. Thus, the application is not limited to any particular combination of hardware and software.
  • a processor configured to execute a program, wherein the program is executed to perform the method described in any of the above embodiments.

Landscapes

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

Abstract

本申请提供了一种消息交互的方法及装置,及互操作功能,其中,采用该方案,在用户终端UE在第四代4G网络和第五代5G网络间跨网络切换或接入网络的情况下,由互操作功能IWF接收源核心网控制网元传输的交互消息;该IWF为该UE选取目标核心网控制网元;该IWF将该交互消息发送至该目标核心网控制网元。

Description

消息交互的方法及装置及互操作功能
本申请要求在2017年10月10日提交中国专利局、申请号为201710936725.5的中国专利申请的优先权,该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域,例如涉及一种消息交互的方法及装置及互操作功能。
背景技术
在相关技术中,第三代合作伙伴计划(3rd Generation Partnership Project,3GPP)目前正在进行5G(5th Generation)系统的研究,根据3GPP标准工作组的定义,5G系统包括无线子系统5G无线接入系统(5G Radio Access Network,5G RAN)、5G核心网子系统5G核心网(5G Core,5GC)。
图1是根据相关技术中5G系统的架构示意图,如图1所示,5G无线子系统部分,主要包括新一代无线基站(New Radio,NR)。5G核心网子系统部分,主要包含统一数据管理功能(Unified Data Management,UDM)、接入管理功能(Access Management Function,AMF)、会话管理功能(Session Management Function,SMF)、用户面功能(User Plane Function,UPF)、策略控制功能(Policy Control Function,PCF)。
统一数据管理功能(Unified Data Management,UDM):是用户签约数据的永久存放地点,位于用户签约的归属网。
接入管理功能(Access Management Function,AMF):对用户接入到网络的需求进行管理,负责终端到网络的非接入层(Non-Access Stratum,NAS)信令管理、用户移动性管理等功能。
会话管理功能(Session Management Function,SMF):管理用户的分组数据单元(Packet Data Unit,PDU)会话、服务质量(Quality of Service,QoS)流,为UPF制定包检测和转发规则等。
用户面功能(User Plane Function,UPF):负责互联网协议(Internet Protocol,IP)数据、非IP数据的路由和转发、用量上报等功能。
策略控制功能(Policy Control Function,PCF):负责为AMF、SMF提供多级别策略规则。
对5G系统的研究,需要实现和传统4G系统的互操作,比如从5G系统切换到4G系统、或从4G系统切换到5G系统。
图2是根据相关技术中4G系统的架构示意图,如图2所示,4G无线子系统部分,也称为演进的通用陆地无线接入网络(Evolved Universal Terrestrial Radio Access Network,EUTRAN),主要包括演进的节点B(Evolved NodeB,eNodeB)。4G核心网子系统部分,也称为演进的分组核心网(Evolved Packet Core,EPC),主要包含归属用户数据服务器(Home Subscriber Server,HSS)、移动性管理单元(Mobility Management Entity,MME)、服务网关(Serving Gateway,SGW)、分组数据网络网关(PDN Gateway,PGW)、策略与计费规则功能实体(Policy and Charging Enforcement Function,PCRF)。
归属用户数据服务器(Home Subscriber Server,HSS):是用户签约数据的永久存放地点,位于用户签约的归属网。
移动性管理网元(Mobility Management Entity,MME):是用户签约数据在当前网络的存放地点,负责终端到网络的非接入层(Non-Access Stratum,NAS)信令管理、用户空闲模式下的跟踪和寻呼管理功能和承载管理。
服务网关(Serving Gateway,SGW):是核心网到无线系统的网关,负责终端到核心网的用户面承载、终端空闲模式下的数据缓存、网络侧发起业务请求的功能、合法窃听和分组数据路由和转发功能。
分组数据网络网关(PDN Gateway,PGW):是演进的分组域系统(Evolved Packet System,EPS)和该系统外部网络的网关,负责终端的IP地址分配、计费功能、分组包过滤、策略应用等功能。
策略与计费规则功能实体(Policy and Charging Enforcement Function,PCRF):负责向PCEF提供策略控制与计费规则。
为了实现5G系统和4G系统的互操作,在5G系统的AMF和4G系统的MME之间,定义了N26接口,以支持5G系统和4G系统之间的切换操作,图3是根据相关技术中4G和5G系统通过N26接口切换的示意图,如图3所示,HSS和UDM有可能实现互相通信。
然而,AMF和MME之间通讯,也存在需要改进的情况。
1)4G和5G中接口协议不同:在5G系统中,AMF和其他核心网功能(Network Function,NF),如AMF、SMF、UDM,采用服务化接口(Service Based Interface,SBI)通讯,SBI接口基于HTTP 2.0协议。然而,在4G系统中,MME 和其他核心网网元,如MME、SGW,采用GTP-C协议通讯。由于4G系统已经使用很多年,要求MME支持SBI服务化接口,对MME影响很大,难以实现。另一方面,虽然5G系统是全新设计的,但是要求全网所有AMF支持GTP-C,工作量也很大。
在5G系统中,核心网多个网络功能网络功能(Network Function,NF)间采用基于服务化接口(Service Based Interface,SBI接口)设计,每个NF暴露若干的服务(Service),供其他NF调用。服务化接口,采用HTTP2.0作为接口协议,接口信元采用JSON方式封装。比如,AMF提供名为Namf的服务化接口,采用HTTP协议来实现。
2)4G和5G中网元/网络功能选择方法不同:在4G系统中,MME基于域名系统(Domain Name System,DNS)来选择MME、SGW、PGW。而在5G系统中,由于选择NF的条件比4G系统中复杂很多,传统DNS系统很难满足需求。因此,在5G中,引入了NF注册信息库(NF Repository Function,NRF),提供SBI服务化接口,来实现NF及NF服务的注册和发现。对MME而言,通过DNS来选择5G中的AMF,对DNS系统配置工作量巨大,并且也无法提供和5G一样丰富的选择条件。另外,由于MME难以支持SBI服务化接口,也使得MME难以从NRF中选择AMF。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本申请实施例提供了一种消息交互的方法及装置,及互操作功能,避免相关技术中实现两种移动通信网络互操作技术复杂度高的情况。
根据本申请的一个实施例,提供了一种消息交互的方法,应用于用户终端(User Equipment,UE)在第四代4G网络和第五代5G网络间跨网络切换或接入网络,包括:互操作功能(Inter-Working Function,IWF)接收源核心网控制网元传输的交互消息;所述IWF为所述UE选取目标核心网控制网元;所述IWF将所述交互消息发送至所述目标核心网控制网元,其中,所述源核心网控制网元和所述目标核心网控制网元为不同代移动通信系统中的网络功能。
根据本申请的另一个实施例,还提供了一种消息交互的装置,应用于用户终端UE在第四代4G网络和第五代5G网络间跨网络切换或接入网络,包括: 接收模块,设置为接收源核心网控制网元传输的交互消息;选取模块,设置为为所述UE选取目标核心网控制网元;发送模块,设置为将所述交互消息发送至所述目标核心网控制网元,其中,所述源核心网控制网元和所述目标核心网控制网元为不同代移动通信系统中的网络功能。
根据本申请的另一个实施例,还提供了一种互操作功能IWF,应用于用户终端UE在第四代4G网络和第五代5G网络间跨网络切换接入网络,包括:处理器和用于存储程序的存储器,其中,所述处理器配置为从所述存储器读取所述程序,并运行所述程序以执行以下操作:接收源核心网控制网元传输的交互消息;为所述UE选取目标核心网控制网元;将所述交互消息发送至所述目标核心网控制网元,其中,所述源核心网控制网元和所述目标核心网控制网元为不同代移动通信系统中的网络功能。
根据本申请的另一个实施例,还提供了一种存储介质,所述存储介质包括存储的程序,其中,所述程序运行时执行上述实施例任一项中所述的方法。
根据本申请的另一个实施例,还提供了一种处理器,所述处理器设置为运行程序,其中,所述程序运行时执行上述实施例任一项中所述的方法。
在阅读并理解了附图和详细描述后,可以明白其他方面。
附图说明
此处所说明的附图用来提供对本申请的进一步理解,构成本申请的一部分,本申请的示意性实施例及其说明用于解释本申请,并不构成对本申请的不当限定。在附图中:
图1是相关技术中5G系统的架构示意图;
图2是相关技术中4G系统的架构示意图;
图3是相关技术中4G和5G系统通过N26接口切换的示意图;
图4是本申请实施例的消息交互的方法流程图;
图5是本申请实施例的系统架构图;
图6是本申请示例实施例一的流程示意图;
图7是本申请示例实施例二的流程示意图;
图8是本申请示例实施例三的流程示意图;
图9是本申请示例实施例四的流程示意图;
图10是本申请示例实施例五的流程示意图;
图11是本申请示例实施例六的流程示意图。
具体实施方式
本申请实施例中的方案可以应用于4G通信系统和5G通信系统之间进行互操作,例如终端在二者之间进行切换,接入某个网络等场景。需要说明的是,本申请实施例中提供的上述信息传输方法的运行环境并不限于上述网络架构。
在本实施例中提供了一种运行于上述移动终端的消息交互的方法,可以应用于用户终端UE在第四代4G网络和第五代5G网络间跨网络切换或接入网络,图4是根据本申请实施例的消息交互的方法流程图,如图4所示,该流程包括步骤S402和步骤S404。
在步骤S402中,互操作功能IWF接收源核心网控制网元传输的交互消息;该IWF为该UE选取目标核心网控制网元。
在步骤S404中,该IWF将该交互消息发送至该目标核心网控制网元,其中,该源核心网控制网元和该目标核心网控制网元为不同代移动通信系统中的网络功能。
通过上述步骤,在用户终端UE在第四代4G网络和第五代5G网络间跨网络切换或接入网络的情况下,由互操作功能IWF接收源核心网控制网元传输的交互消息;该IWF为该UE选取目标核心网控制网元;该IWF将该交互消息发送至该目标核心网控制网元。采用上述技术方案,通过IWF实现UE在不同代移动通信系统之间完成切换,避免了相关技术中实现两种移动通信网络互操作技术复杂度高的情况,降低了在不同代移动通信系统之间通信的复杂度,保证了通信业务的流畅度。
在一实施例中,该源核心网控制网元传输的交互消息为源接口交互消息,该IWF将该交互消息发送至该目标核心网控制网元之前,该方法还包括:该IWF将该源接口交互消息转换成该目标核心网控制网元对应的目标接口交互消息。
在一实施例中,该源核心网控制网元为4G网络中的移动性管理网元MME,源接口交互消息为S10接口消息,该目标核心网控制网元为5G网络中的接入管理功能AMF,目标接口交互消息为N26或N14接口消息。
在一实施例中,该IWF为该UE选取目标核心网控制网元,包括:该IWF向网络功能信息库NRF发送网络功能发现请求,并携带有指示待发现的网络功 能为AMF的信息;该IWF接受该NRF返回的网络功能发现响应,从网络功能发现响应中的AMF列表中选择AMF为该目标核心网控制网元。
在一实施例中,该网络功能发现请求中携带有网络切片选择辅助信息(Network Slicing Selection Assistance Information,NSSAI),通过以下方式之一获取该NSSAI:该IWF向统一数据管理功能UDM发送鉴权请求,从该UDM返回的鉴权响应中获得该NSSAI;该IWF从该MME传输的该交互消息中获得UE类型,根据该UE类型映射成该NSSAI;该IWF从该MME传输的该交互消息中获得专有核心网标识(Dedicated Core Network Identity,DCN ID),根据该专有核心网标识映射成该NSSAI。
在一实施例中,该IWF向网络功能信息库NRF发送网络功能发现请求,包括:该IWF依据该MME传输的该交互消息获取UE类型;该IWF向该NRF发送该网路功能发现请求,并携带该UE类型。
在一实施例中,该源核心网控制网元为5G网络中的接入管理功能AMF,源接口交互消息为N26或N14接口消息;该目标核心网控制网元为4G网络中的移动性管理网元MME,目标接口交互消息为S10接口消息。
在一实施例中,该IWF为该UE选取目标核心网控制网元,包括:该IWF向域名系统DNS服务器发送DNS查询请求,并携带指示要发现的网元为MME的信息;该IWF接收该DNS服务器返回的DNS查询响应,从该DNS查询响应中的MME列表中选择MME为该目标接入管理功能。
在一实施例中,该DNS查询请求中携带有UE类型,该UE类型通过以下方式之一获取:该IWF向归属用户数据服务器HSS发送鉴权请求,从HSS返回的鉴权响应中获得UE类型;该IWF从该AMF传输的该交互信息中获得网络切片选择辅助信息NSSAI,将该NSSAI映射成该UE类型。
在一实施例中,互操作功能IWF接收源核心网控制网元传输的交互消息之前,该方法还包括:该源核心网控制网元根据本地预设网络策略,确定经由IWF向目标核心网控制网元传输交互消息;该源核心网控制网元获取用于转发交互消息的IWF。
在一实施例中,该源核心网控制网元使用如下方式至少之一确定该IWF:从本地配置数据中获取该IWF;从DNS服务器查询获得该IWF。
在一实施例中,该IWF为该UE选取目标核心网控制网元之后,该方法还包括:该IWF在本地存储该UE对应的源核心网控制网元和目标核心网控制网 元中的至少一种。
在一实施例中,该源核心网控制网元传输的交互消息包括以下之一:前转重分配请求,以及UE上下文请求。
下面结合本申请实施例进行详细说明。
图5是根据本申请实施例的系统架构图,如图5所示的架构,与相关技术相比,本申请在系统中增加5G互操作(5G Interworking,5G-IWF)网络功能;5G-IWF通过S10接口和4G系统中MME通讯。在4G系统中,S10接口用于MME之间的相互通讯;5G-IWF通过N14(或N26)接口和5G系统中的AMF通讯。在5G系统中,N14接口设置为AMF之间的相互通讯,N26接口设置为AMF和4G系统中MME之间的相互通讯;5G-IWF通过Nnrf接口和5G系统中的NRF通讯,设置为为UE选择合适的AMF。
在一实施例中,还可以将5G-IWF通过S6a接口和4G系统中的HSS通讯,用于获取4G系统中的UE签约数据。
5G-IWF通过N8接口和5G系统中的UDM通讯,用于获取5G系统中的UE签约数据。
在上述架构中,5G-IWF提供MME和AMF的部分功能,充当MME和AMF的双向代理,提供如下功能:
a)当和4G网络中MME通讯时,5G-IWF充当MME角色,提供S10接口通讯功能。
b)当和5G网络中AMF通讯时,5G-IWF充当AMF角色,提供N14接口通讯功能。或者,当和5G网络中的AMF通讯时,5G-IWF充当4G网络的MME角色,该MME支持N26接口通讯功能。
c)5G-IWF为MME在5G网络中选择AMF。5G-IWF可以根据MME提供的UE类型(UE Usage Type)或专有核心网标识(DCN ID),映射成5G网络中的网络切片选择辅助信息(Network Slicing Select Assistance Information,NSSAI),并使用该NSSAI向NRF发起NF发现来选择AMF。5G-IWF也可以使用MME提供的UE类型(UE Usage Type)或专有核心网标识(DCN ID),向NRF发起NF发现来选择AMF。5G-IWF也可以从HSS/UDM获取网络切片选择辅助信息NSSAI,并使用所获取的网络切片选择辅助信息NSSAI向NRF发起NF发现来选择AMF。
d)5G-IWF为AMF在4G网络中选择MME。5G-IWF可以根据AMF提供的网络切片选择辅助信息NSSAI映射成4G网络中的UE类型(UE Usage Type),并使用该UE类型向DNS服务器发起DNS查询来选择MME。5G-IWF也可以从HSS/UDM获取UE类型(UE Usage Type),并使用所获取的UE类型(UE Usage Type)向DNS发起DNS查询来选择MME。
e)5G-IWF将MME发送的S10接口消息,转换成N14(或N26)接口消息,转发给AMF。或者,将AMF发送的N14(或N26)接口消息,转换成S10接口消息,转发给MME。
以下是本申请实施例的示例实施例。
示例实施例一:
图6是本申请示例实施例一的流程示意图,如图6所示,显示了当UE从4G网络覆盖移动到5G网络覆盖时,信令从4G经由5G-IWF发往5G的流程。
该流程适用于信令从MME发往AMF的流程,比如,UE在连接态从4G向5G移动后发起切换的流程、UE在空闲态下从5G向4G移动后发起TAU的流程等。
当5G-IWF收到MME发往AMF的交互消息,则5G-IWF执行如下之一的判断:
a)若MME发送的S10接口的交互消息中没有携带AMF信息,且5G-IWF在本地没有保存UE的MME和AMF信息,则5G-IWF为UE选择合适的AMF,将该S10接口的交互消息转换成N26(或N14)接口的交互消息,并转发给5G-IWF所选择的AMF。
b)若MME发送的S10接口的交互消息中携带AMF信息,则5G-IWF将该S10接口的交互消息转换成N26(或N14)接口的交互消息,并转发给MME所指明的AMF。
c)若5G-IWF本地存储有UE的MME和AMF信息,则5G-IWF将该S10接口的交互消息转换成N26(或N14)接口的交互消息,并转发给5G-IWF所存储的AMF。
例如,图6包括步骤S601至步骤S610。
在步骤S601中,为了向AMF发送交互消息,根据本地网络策略,MME选择一个5G-IWF用以向AMF转发交互消息。
在本步骤中,根据流程的需要,MME发往AMF的交互消息,可以是如下 消息:前转重分配请求/响应(Forward Relocation Request/Response)、UE上下文请求/响应(UE Context Request/Response)等。
在本步骤中,MME可以通过如下方式选择5G-IWF:
a)从本地配置数据中选择:在网络策略中,可以配置至少一个5G-IWF,当配置多个5G-IWF时,还可以配置5G-IWF的选择策略,比如根据位置区域来选择5G-IWF。
b)从DNS系统获得5G-IWF:在DNS系统中配置至少一个5G-IWF,则可根据5G-IWF的全域名FQDN从DNS系统查询获得5G-IWF。
在步骤S602中,MME向5G-IWF发送是S10接口的交互消息。
在本步骤中,MME在发送S10接口的交互信息时,可能携带目标无线接入类型(Radio Access Type,RAT)。在本流程中,由于交互消息发往5G,则目标RAT设置成新无线接入类型(New RAT,NR)。
在本步骤中,MME在发送S10接口的交互信息时,可能携带UE类型(UE Usage Type)或专有核心网标识(DCN ID)。
在本步骤中,MME在发送S10接口的交互信息时,可能携带目标AMF信息。
当5G-IWF收到MME发送的S10接口的交互消息后,若该交互消息中包含AMF信息,则5G-IWF跳过步骤S603-S606直接执行步骤S607。
在步骤S603,5G-IWF判断需要为UE在5G网络中选择合适的AMF;
在本步骤中,5G-IWF使用如下方法之一或组合,判断需要为UE选择合适的AMF:
a)根据交互消息的消息类型,判断应为UE选择合适的AMF。
根据此方法,比如,当MME发起切换流程时,5G-IWF根据切换请求消息,判断UE在5G网络中未分配AMF,则应为UE选择合适的AMF。
b)根据5G-IWF中存储的信息,若5G-IWF中还没有为该UE存储MME和AMF信息,则应UE选择合适的AMF。
在本步骤中,若5G-IWF上存储有UE的MME和AMF信息,则5G-IWF使用所存储的AMF信息,跳过步骤S604-S608直接执行步骤S609。
在步骤S604中,根据需要,5G-IWF向UDM发起鉴权请求,利用该鉴权请求获取UE签约数据中配置的网络切片选择辅助信息NSSAI。
在本步骤中,5G-IWF根据如下之一的条件决定是否从UDM获取网络切片 选择信息NSSAI:
a)无论MME在S10交互消息中是否携带UE类型(UE Usage Type)或专有核心网标识(DCN ID),5G-IWF均从UDM获取网络切片选择辅助信息NSSAI。
b)若MME在S10交互消息中携带了UE类型,则5G-IWF将该UE类型映射成网络切片选择辅助信息NSSAI,且5G-IWF不从UDM获取网络切片选择辅助信息NSSAI。
c)若MME在S10交互消息中携带了专有核心网标识(DCN ID),则5G-IWF将该专有核心网标识(DCN ID)映射成网络切片选择辅助信息NSSAI,且5G-IWF不从UDM获取网络切片选择辅助信息NSSAI。
在步骤S605中,UDM向5G-IWF返回鉴权响应,携带网络切片选择辅助信息NSSAI。
在步骤S606中,5G-IWF向NRF发送NF发现请求,指明要发现的NF类型为AMF。
在本步骤中,5G-IWF在NF发现请求中,携带网络切片选择辅助信息NSSAI。该网络切片选择辅助信息,可以是5G-IWF从UDM获得,也可以根据MME提供的UE类型(UE Usage Type)或专有核心网标识(DCN ID)所映射获得。则NRF可根据5G-IWF所提供的网络切片选择辅助信息为UE分配AMF。
或者,在本步骤中,5G-IWF在NF发现请求中,携带UE类型(UE Usage Type)。该UE类型,可以是5G-IWF从MME发送的交互消息中获得。则NRF还可以根据5G-IWF所提供的UE类型为UE分配AMF。
或者,在本步骤中,5G-IWF在NF发现请求中,携带专有核心网标识(DCN ID)。该专有核心网标识,可以是5G-IWF从MME发送的交互消息中获得。则NRF还可以根据5G-IWF所提供的专有核心网标识为UE分配AMF。
在步骤S607中,NRF向5G-IWF返回NF发现响应,携带AMF列表。
在步骤S608中,5G-IWF根据NRF返回的AMF列表,为UE选择合适的AMF。
在本步骤中,5G-IWF根据UE的信息(如UE类型、UE当前位置信息)以及其他条件,为UE选择合适的AMF。
在步骤S609中,5G-IWF将MME发送的S10接口的交互消息,转换成N26(或N14)接口的交互消息,并向AMF转发转换后的交互消息。
在步骤S610中,在5G-IWF为UE选择合适的AMF后,5G-IWF可以在本 地存储该UE的MME和AMF信息,以便正确地转发MME和AMF间的后续交互消息。
示例实施例二:
图7是本申请示例实施例二的流程示意图,如图7所示,显示了当UE从5G网络覆盖移动到4G网络覆盖时,信令从AMF经过5G-IWF发往MME的流程。
该流程适用于信令从MME发往AMF的流程。比如,UE在连接态从4G向5G移动后发起切换的流程,UE在空闲态下从5G向4G移动后发起TAU的流程等。
根据图7所示的流程,当5G-IWF收到AMF发往MME的交互消息,则5G-IWF执行如下之一的判断:
a)若AMF发送的N26(或N14)接口的交互消息中没有携带MME信息,且5G-IWF在本地没有保存UE的MME和AMF信息,则5G-IWF为UE选择合适的MME,将该N26(或N14)接口的交互消息转换成S10接口的交互消息,并转发给5G-IWF所选择的MME。
b)若AMF发送的N26(或N14)接口的交互消息中携带MME信息,则5G-IWF将该N26(或N14)接口的交互消息转换成S10接口的交互消息,并转发给AMF所指明的MME。
c)若5G-IWF本地存储有UE的MME和AMF信息,则5G-IWF将该N26(或N14)接口的交互消息转换成S10接口的交互消息,并转发给5G-IWF所存储的MME。
例如,图7包括步骤S701至步骤S710。
在步骤S701中,为了向MME发送交互消息,根据本地网络策略,AMF选择一个5G-IWF用以向MME转发交互消息。
在本步骤中,根据流程的需要,AMF发往MME的交互消息,可以是如下消息:前转重分配请求/响应(Forward Relocation Request/Response)、UE上下文请求消/响应(UE Context Request/Response),等消息。
和图6所示流程一样,AMF可以通过本地配置数据或DNS获取5G-IWF信息。
在步骤S702中,AMF向5G-IWF发送是N26(或N14)接口的交互消息。
在本步骤中,AMF在发送N14(或N26)接口的交互信息时,可能携带目标RAT。在本流程中,由于交互消息发往4G,则目标RAT设置成EUTRAN。
在本步骤中,AMF在发送N14(或N26)接口的交互信息时,可能携带网络切片选择辅助信息NSSAI。
在本步骤中,AMF在发送N14(或N26)接口的交互信息时,可能携带目标MME信息。
当5G-IWF收到AMF发送的N26(或N14)接口的交互消息后,若该交互消息中包含MME信息,则5G-IWF跳过步骤S703-S706直接执行步骤S707。
在步骤S703中,5G-IWF判断需要为UE在4G网络中选择合适的MME。
在本步骤中,5G-IWF使用如下方法之一或组合,判断需要为UE选择合适的MME:
a)根据交互消息的消息类型,判断应为UE选择合适的MME。
根据此方法,比如,当AMF发起切换流程时,5G-IWF根据切换请求消息,判断UE在4G网络中未分配MME,则应为UE选择合适的MME。
b)根据5G-IWF中存储的信息,若5G-IWF中还没有为该UE存储MME和AMF信息,则应UE选择合适的MME。
在本步骤中,若5G-IWF上存储有UE的MME和AMF信息,则5G-IWF使用所存储的MME信息,跳过步骤S604-S608直接执行步骤S709。
在步骤S704中,根据需要,5G-IWF向HSS发起鉴权请求,利用该鉴权请求获取UE签约数据中配置的UE类型(UE Usage Type)。
在本步骤中,5G-IWF根据如下之一的条件决定是否从HSS获取UE类型:
a)无论AMF在N14(或N26)接口交互消息中是否携带网络切片选择辅助信息NSSAI,5G-IWF均从HSS获取UE类型。
b)若AMF在N14(或N26)接口交互消息中携带了网络切片选择辅助信息NSSAI,则5G-IWF将该网络切片选择辅助信息NSSAI映射成UE类型,且5G-IWF不从HSS获取UE类型。
在步骤S705中,UDM向5G-IWF返回鉴权响应,携带UE类型。
在步骤S706中,5G-IWF向DNS服务器发送DNS查询请求,使用MME的全域名FQDN,请求发现合适的MME。
在本步骤中,5G-IWF在DNS查询请求中,携带UE类型。该UE类型,可以是5G-IWF从HSS获得,或根据AMF提供的网络切片选择辅助信息NSSAI 所映射获得。
在步骤S707中,DNS服务器向5G-IWF返回DNS查询响应,携带MME列表。
在步骤S708中,5G-IWF根据DNS服务器返回的MME列表,为UE选择合适的MME。
在步骤S709中,5G-IWF将AMF发送的N26(或N14)接口的交互消息,转换成S10接口的交互消息,并向AMF转发转换后的交互消息。
在步骤S710中,在5G-IWF为UE选择合适的MME后,5G-IWF可以在本地存储该UE的MME和AMF信息,以便正确地转发MME和AMF间的后续交互消息。
示例实施例三:
图8是本申请示例实施例三的流程示意图,如图8所示,显示了当UE在空闲态从4G网络覆盖移动到5G网络覆盖时,在5G网络发起RU(Registration Update,注册更新)的流程。
图8包括步骤S80至步骤S815。
在步骤S801中,在空闲态(IDLE态)下,UE从4G覆盖移动到5G覆盖,触发在5G网络中注册流程。
若UE先前仅驻留并接入在4G网络,则UE向5G网络发起初始注册(Initial Registration)请求。
在步骤S802中,UE向目标基站5G-AN发起初始注册请求,携带签约用户永久标识(Subscription Permanent Identifier,SUPI)、以及UE接入4G网络时被分配的临时标识。
在本步骤中,SUPI通常是IMSI,UE接入4G网络时被分配的临时标识,即MME为UE分配的全局唯一临时标识(Globally Unique Temporary Identity,GUTI)。
为了区别于在5G网络中所分配的GUTI,在4G网络中所分配的GUTI被称为4G GUTI,而在5G网络中所分配的GUTI被称为5G GUTI。
在步骤S803中,5G-AN收到UE的注册请求后,为UE选择合适的AMF。
本步骤中,5G-AN根据UE所提供的信息,如切片网络选择辅助信息NSSAI、UE当前位置信息等,为UE选择合适的AMF。
在步骤S804中,5G AN向AMF发送注册请求。
在步骤S805中,AMF收到注册请求后,判断需要经过5G-IWF向MME获取UE上下文。
在本步骤中,AMF根据UE所提供的4G GUTI,判断UE先前接入到4G网络,因此需要从UE先前接入的MME获取UE上下文。并且,AMF根据本地网络策略,判断AMF和MME的交互,必须要经过5G-IWF。AMF根据本地网络策略,选择5G-IWF。
在步骤S806中,AMF经过5G-IWF向MME发送UE上下文请求。
在步骤S807中,MME经过5G-IWF向AMF返回UE上下文响应,其中携带UE的上下文数据。
在步骤S808中,AMF经过5G-IWF向MME发送UE上下文确认。
在步骤S809中,AMF为UE选择合适的SMF和UPF。
在本步骤中,AMF根据从MME获取的UE上下文数据,确定应该为UE建立何种PDU连接,并且据此为UE选择合适的SMF/UPF,以便在5G网络中为UE创建相应的PDU连接和QoS流。
在步骤S810中,AMF向SMF/UPF发送PDU会话建立请求,要求为UE创建对应的PDU连接和QoS流。
在步骤S811中,SMF/UPF为UE建立对应的PDU连接和QoS流,向AMF返回PDU会话建立响应。
在步骤S812中,AMF向UDM发送AMF注册请求。
在步骤S813中,UDM处理AMF的注册请求,返回AMF注册响应。
在步骤S814中,AMF向5G-AN返回注册响应。
在步骤S815中,5G-AN向UE转发注册响应。
示例实施例四:
图9是本申请示例实施例四的流程示意图,如图9所示,显示了当UE在空闲态从5G网络覆盖移动到4G网络覆盖时,发起跟踪区域更新(Tracking Area Update,TAU)的流程。
图9包括步骤S901至步骤S915。
在步骤S901中,在空闲态(IDLE态)下,UE从5G覆盖移动到4G覆盖,触发在4G网络中的TAU流程。
在步骤S902中,UE向目标基站eNodeB发起TAU请求,携带IMSI、以及UE接入5G网络时被分配的临时标识,即5G GUTI。
在步骤S903中,eNodeB收到UE的注册请求后,为UE选择合适的MME。
本步骤中,eNodeB根据UE的信息,如终端类型、UE位置信息等,为UE选择合适的MME。
在步骤S904中,eNodeB向MME发送注册请求。
在步骤S905中,MME收到TAU请求后,判断需要经过5G-IWF向AMF获取UE上下文。
在本步骤中,MME根据UE所提供的5G GUTI,判断UE先前接入到5G网络,因此需要从先前UE接入的AMF获取UE上下文。并且,MME根据本地网络策略,判断MME和AMF的交互,必须要经过5G-IWF。MME根据本地网络策略,选择5G-IWF。
在步骤S906中,MME经过5G-IWF向AMF发送UE上下文请求。
在步骤S907中,AMF经过5G-IWF向MME返回UE上下文响应,其中携带UE的上下文数据。
在步骤S908中,MME经过5G-IWF向AMF发送UE上下文确认。
在步骤S909中,MME为UE选择合适的SGW和PGW。
在本步骤中,MME根据从MME获取的UE上下文数据,确定应该为UE建立何种PDN连接,以及UE当前位置等信息,为UE选择合适的SGW和PGW,以便在4G网络中为UE创建相应的PDN连接和EPS承载。
在步骤S910中,MME向SGW/PGW发送PDN会话建立请求,要求为UE创建对应的PDN连接和EPS承载。
在步骤S911中,SGW/PGW为UE建立对应的PDN连接和EPS承载,向MME返回PDN会话建立响应。
在步骤S912中,MME向HSS发送位置更新请求。
在步骤S913中,HSS处理MME的位置更新请求,返回位置更新响应。
在步骤S914中,MME向eNodeB返回TAU响应。
在步骤S915中,eNodeB向UE转发TAU响应。
示例实施例五:
如图10所示,显示了当UE在连接态从4G网络覆盖移动到5G网络覆盖时, 从4G网络向5G网络发起切换的流程。
图10是本申请示例实施例五的流程示意图,如图10所示,包括步骤S1001至步骤S1024。
在步骤S1001中,在连接态(CONNECTED态)下,UE从4G覆盖移动到5G覆盖,eNodeB根据UE发送的测量报告,触发了从4G网络向5G网络的切换流程。
在步骤S1002中,源基站eNodeB向源MME发送切换请求(Handover Required)。
在步骤S1003中,MME收到切换请求后,判断需要经过5G-IWF向5G网络发起切换。
在本步骤中,MME根据本地网络策略,判断AMF和MME的交互,必须要经过5G-IWF。MME根据本地网络策略,选择5G-IWF。
在步骤S1004中,MME向5G-IWF发送前转重分配请求(Forward Relocation Request),其中携带4G GUTI、UE上下文等信息。
在步骤S1005中,5G-IWF向NRF发送NF发现请求,请求发现AMF,即在NF发现请求中指示NF类型为AMF。
在步骤S1006中,NRF向5G-IWF返回NF发现响应,携带AMF列表。
在步骤S1007中,5G-IWF根据NRF返回的AMF列表,为UE选择合适的AMF。
本步骤中,5G-IWF根据UE的信息(如UE类型、UE当前位置信息)以及其他条件,为UE选择合适的AMF。
在步骤S1008中,5G-IWF向AMF发送前转重分配请求,其中携带4G GUTI、UE上下文等信息。
在步骤S1009中,AMF向目标基站5G-AN发送切换请求(Handover Request),要求5G-AN为切换做资源预留。
在步骤S1010中,5G-AN为切换预留资源,并向AMF返回切换响应(Handover Response)。
在步骤S1011中,AMF经过5G-IWF向MME发送前转重分配响应(Forward Relocation Response)。
在步骤S1012中,源MME向源基站eNodeB发送切换命令(HO Command)。
在步骤S1013中,eNodeB向UE发送切换命令(Handover Command),要 求UE切换无线资源。
在步骤S1014中,UE完成无线资源的切换,并向目标基站5G-AN发送切换确认(Handover Confirm)。
在步骤S1015中,5G-AN向AMF发送切换通知(Handover Notify)消息。
在步骤S1016中,AMF经过5G-IWF向MME发送前转重分配完成(Forward Relocation Complete)消息。
在步骤S1017中,MME经过5G-IWF向AMF发送前转重分配完成确认(Forward Relocation Complete Ack)消息。
在步骤S1018中,AMF为UE选择合适的SMF和UPF。
在本步骤中,AMF根据从MME获取的UE上下文数据,确定应该为UE建立何种PDU连接,并且据此为UE选择合适的SMF/UPF,以便在5G网络中为UE创建相应的PDU连接和QoS流。
在步骤S1019中,AMF向SMF/UPF发送PDU会话建立请求,要求为UE创建对应的PDU连接和QoS流。
在步骤S1020中,SMF/UPF为UE建立对应的PDU连接和QoS流,向AMF返回PDU会话建立响应。
在步骤S1021中,在触发无线切换后,UE在5G中发起注册流程(Registration Procedure),AMF处理UE的注册流程。
在步骤S1022中,源MME向源基站eNodeB发起UE上下文释放(UE Context Release)。
在步骤S1023中,eNodeB释放先前分配给UE的资源,并向源MME发送UE上下文释放响应(UE Context Release Ack)。
在步骤S1024中,源MME触发SGW/PGW释放为UE分配的EPS承载、PDN连接。
示例实施例六:
图11是本申请示例实施例六的流程示意图,如图11所示,显示了当UE在连接态从5G网络覆盖移动到4G网络覆盖时,从5G网络向4G网络发起切换的流程。
图11包括步骤S1101至步骤S1124。
在步骤S1101中,在连接态(CONNECTED态)下,UE从5G覆盖移动到 4G覆盖,源基站5G-AN根据UE发送的测量报告,触发了从5G网络向4G网络的切换流程。
在步骤S1102中,源基站5G-AN向源AMF发送切换请求(HandoverRequired)。
在步骤S1103中,AMF收到切换请求后,判断需要经过5G-IWF向4G网络发起切换。
在本步骤中,AMF根据本地网络策略,判断AMF和MME的交互,必须要经过5G-IWF。AMF根据本地网络策略,选择5G-IWF。
在步骤S1104中,AMF向5G-IWF发送前转重分配请求(Forward Relocation Request),其中携带5G GUTI、UE上下文等信息。
在步骤S1105中,AMF向DNS服务器发送DNS查询请求,请求发现MME,并根据DNS服务器返回的MME列表选择合适的MME。
在步骤S1108中,5G-IWF向MME发送前转重分配请求,其中携带5G GUTI、UE上下文等信息。
在步骤S1109中,MME向目标基站eNodeB发送切换请求(Handover Request),要求eNodeB为切换做资源预留。
在步骤S1110中,eNodeB为切换预留资源,并向MME返回切换响应(Handover Response)。
在步骤S1111中,MME经过5G-IWF向AMF发送前转重分配响应(Forward Relocation Response)。
在步骤S1112中,源AMF向源基站5G-AN发送切换命令(HO Command)。
在步骤S1113中,5G-AN向UE发送切换命令(Handover Command),要求UE切换无线资源。
在步骤S1114中,UE完成无线资源的切换,并向目标基站eNodeB发送切换确认(Handover Confirm)。
在步骤S1115中,eNodeB向MME发送切换通知(Handover Notify)消息。
在步骤S1116中,MME经过5G-IWF向AMF发送前转重分配完成(Forward Relocation Complete)消息。
在步骤S1117中,AMF经过5G-IWF向MME发送前转重分配完成确认(Forward Relocation Complete Ack)消息。
在步骤S1118中,MME为UE选择合适的SGW和PGW。
在本步骤中,MME根据从AMF获取的UE上下文数据,确定应该为UE建立何种PDN连接,并且据此为UE选择合适的SGW/PGW,以便在4G网络中为UE创建相应的PDN连接和EPS承载。
在步骤S1119中,MME向SGW/PGW发送PDN会话建立请求,要求为UE创建对应的PDN连接和EPS承载。
在步骤S1120中,SGW/PGW为UE建立对应的PDN连接和EPS承载,向MME返回PDN会话建立响应。
在步骤S1121中,在触发无线切换后,UE在4G中发起TAU流程,MME处理UE的TAU流程。
在步骤S1122中,源AMF向源基站5G-AN发起UE上下文释放(UE Context Release)。
在步骤S1123中,5G-AN释放先前分配给UE的资源,并向源AMF发送UE上下文释放响应(UE Context Release Ack)。
在步骤S1124中,源AMF触发SMF/UPF释放为UE分配的PDU会话。
通过以上的实施方式的描述,本领域的技术人员可以了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现,当然也可以通过硬件。基于这样的理解,本申请的技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质,例如只读存储器/随机存取存储器(Read Only Memory/Random Access Memory,ROM/RAM)、磁碟、光盘中,包括若干指令用以使得一台终端设备(可以是手机,计算机,服务器,或者网络设备等)执行本申请每个实施例所述的方法。
在本实施例中还提供了一种消息交互的装置,该装置设置为实现上述实施例及实施方式,已经进行过说明的不再赘述。如以下所使用的,术语“模块”可以实现预定功能的软件和硬件中至少一种的组合。以下实施例所描述的装置可以以软件来实现,但是硬件,或者软件和硬件的组合的实现也是可能并被构想的。
根据本申请的另一个实施例,还提供了一种消息交互的装置,应用于用户终端UE在第四代4G网络和第五代5G网络间跨网络切换或接入网络,包括:
接收模块,设置为接收源核心网控制网元传输的交互消息;
选取模块,设置为为该UE选取目标核心网控制网元;发送模块,设置为将该交互消息发送至该目标核心网控制网元,其中,该源核心网控制网元和该目标核心网控制网元为不同代移动通信系统中的网络功能。
根据本申请的另一个实施例,还提供了一种互操作功能IWF,应用于用户终端UE在第四代4G网络和第五代5G网络间跨网络切换接入网络,包括:处理器和用于存储程序的存储器,其中,所述处理器配置为从所述存储器读取所述程序,并运行所述程序以执行以下操作:接收源核心网控制网元传输的交互消息;为该UE选取目标核心网控制网元;将该交互消息发送至该目标核心网控制网元,其中,该源核心网控制网元和该目标核心网控制网元为不同代移动通信系统中的网络功能。
需要说明的是,上述每个模块是可以通过软件或硬件来实现的,对于后者,可以通过以下方式实现,但不限于此:上述模块均位于同一处理器中;或者,上述多个模块以任意组合的形式分别位于不同的处理器中。
根据本申请的另一个实施例,还提供了一种存储介质,该存储介质包括存储的程序,其中,该程序运行时执行上述实施例任一项中所述的方法。
本领域的技术人员应该明白,上述的本申请的每个模块或每个步骤可以用通用的计算装置来实现,它们可以集中在单个的计算装置上,或者分布在多个计算装置所组成的网络上。它们可以用计算装置可执行的程序代码来实现,从而,可以将它们存储在存储装置中由计算装置来执行。在某些情况下,可以以不同于此处的顺序执行所示出或描述的步骤,可以将它们分别制作成多个集成电路模块,也可以将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样,本申请不限制于任何特定的硬件和软件结合。
根据本申请的另一个实施例,还提供了一种处理器,该处理器设置为运行程序,其中,该程序运行时执行上述实施例任一项中所述的方法。

Claims (17)

  1. 一种消息交互的方法,应用于用户终端UE在第四代4G网络和第五代5G网络间跨网络切换或接入网络,包括:
    互操作功能IWF接收源核心网控制网元传输的交互消息;
    所述IWF为所述UE选取目标核心网控制网元;
    所述IWF将所述交互消息发送至所述目标核心网控制网元,其中,所述源核心网控制网元和所述目标核心网控制网元为不同代移动通信系统中的网络功能。
  2. 根据权利要求1所述的方法,其中,所述源核心网控制网元传输的交互消息为源接口交互消息,所述IWF将所述交互消息发送至所述目标核心网控制网元之前,所述方法还包括:
    所述IWF将所述源接口交互消息转换成所述目标核心网控制网元对应的目标接口交互消息。
  3. 根据权利要求2所述的方法,其中,所述源核心网控制网元为4G网络中的移动性管理网元MME,所述源接口交互消息为S10接口消息,所述目标核心网控制网元为5G网络中的接入管理功能AMF,所述目标接口交互消息为N26或N14接口消息。
  4. 根据权利要求3所述的方法,其中,所述IWF为所述UE选取目标核心网控制网元,包括:
    所述IWF向网络功能信息库NRF发送网络功能发现请求,并携带有指示待发现的网络功能为AMF的信息;
    所述IWF接受所述NRF返回的网络功能发现响应,从所述网络功能发现响应中的AMF列表中选择AMF作为所述目标核心网控制网元。
  5. 根据权利要求4所述的方法,其中,所述网络功能发现请求中携带有网络切片选择辅助信息NSSAI,通过以下方式之一获取所述NSSAI:
    所述IWF向统一数据管理功能UDM发送鉴权请求,从所述UDM返回的鉴权响应中获得所述NSSAI;
    所述IWF从所述MME传输的所述交互消息中获得UE类型,根据所述UE类型映射成所述NSSAI;以及
    所述IWF从所述MME传输的所述交互消息中获得专有核心网标识DCN ID,根据所述专有核心网标识映射成所述NSSAI。
  6. 根据权利要求4所述的方法,其中,所述IWF向核心网功能数据库NRF 发送网络功能发现请求,包括:
    所述IWF依据所述MME传输的所述交互消息获取UE类型;
    所述IWF向所述NRF发送所述网络功能发现请求,并携带所述UE类型。
  7. 根据权利要求2所述的方法,其中,所述源核心网控制网元为5G网络中的接入管理功能AMF,所述源接口交互消息为N26或N14接口消息;所述目标核心网控制网元为4G网络中的移动性管理网元MME,所述目标接口交互消息为S10接口消息。
  8. 根据权利要求7所述的方法,其中,所述IWF为所述UE选取目标核心网控制网元,包括:
    所述IWF向域名系统DNS服务器发送DNS查询请求,并携带指示要发现的网元为MME的信息;
    所述IWF接收所述DNS服务器返回的DNS查询响应,从所述DNS查询响应中的MME列表中选择MME作为所述目标接入管理功能。
  9. 根据权利要求8所述的方法,其中,所述DNS查询请求中携带有UE类型,所述UE类型通过以下方式之一获取:
    所述IWF向归属用户数据服务器HSS发送鉴权请求,从所述HSS返回的鉴权响应中获得所述UE类型;以及
    所述IWF从所述AMF传输的所述交互信息中获得网络切片选择辅助信息NSSAI,将所述NSSAI映射成所述UE类型。
  10. 根据权利要求1所述的方法,互操作功能IWF接收源核心网控制网元传输的交互消息之前,所述方法还包括:
    所述源核心网控制网元根据本地预设网络策略,确定经由所述IWF向所述目标核心网控制网元传输所述交互消息;
    所述源核心网控制网元获取用于转发所述交互消息的所述IWF。
  11. 根据权利要求10所述的方法,其中,所述源核心网控制网元使用如下方式至少之一确定所述IWF:
    从本地配置数据中获取所述IWF;以及
    从DNS服务器查询获得所述IWF。
  12. 根据权利要求1所述的方法,所述IWF为所述UE选取目标核心网控制网元之后,所述方法还包括:
    所述IWF在本地存储所述UE对应的源核心网控制网元和目标核心网控制 网元中的至少一种。
  13. 根据权利要求7所述的方法,其中,所述源核心网控制网元传输的交互消息包括以下之一:
    前转重分配请求,前转重分配响应,UE上下文请求,以及UE上下文请求响应。
  14. 一种消息交互的装置,应用于用户终端UE在第四代4G网络和第五代5G网络间跨网络切换或接入网络,包括:
    接收模块,设置为接收源核心网控制网元传输的交互消息;
    选取模块,设置为为所述UE选取目标核心网控制网元;
    发送模块,设置为将所述交互消息发送至所述目标核心网控制网元,其中,所述源核心网控制网元和所述目标核心网控制网元为不同代移动通信系统中的网络功能。
  15. 一种互操作功能IWF,应用于用户终端UE在第四代4G网络和第五代5G网络间跨网络切换接入网络,包括:
    接收源核心网控制网元传输的交互消息;
    为所述UE选取目标核心网控制网元;
    将所述交互消息发送至所述目标核心网控制网元,其中,所述源核心网控制网元和所述目标核心网控制网元为不同代移动通信系统中的网络功能。
  16. 一种存储介质,所述存储介质包括存储的程序,其中,所述程序运行时执行上述权利要求1至13任一项中所述的方法。
  17. 一种处理器,所述处理器设置为运行程序,其中,所述程序运行时执行上述权利要求1至13任一项中所述的方法。
PCT/CN2018/109623 2017-10-10 2018-10-10 消息交互的方法及装置及互操作功能 WO2019072188A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710936725.5A CN109661006B (zh) 2017-10-10 2017-10-10 消息交互的方法及装置,及互操作功能
CN201710936725.5 2017-10-10

Publications (1)

Publication Number Publication Date
WO2019072188A1 true WO2019072188A1 (zh) 2019-04-18

Family

ID=66100434

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/109623 WO2019072188A1 (zh) 2017-10-10 2018-10-10 消息交互的方法及装置及互操作功能

Country Status (2)

Country Link
CN (1) CN109661006B (zh)
WO (1) WO2019072188A1 (zh)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111699724A (zh) * 2020-05-08 2020-09-22 北京小米移动软件有限公司 控制终端的方法及装置、存储介质
CN112616166A (zh) * 2020-12-04 2021-04-06 中国联合网络通信集团有限公司 一种数据处理方法及装置
CN113691936A (zh) * 2021-08-25 2021-11-23 中国联合网络通信集团有限公司 基于共享基站的终端接入方法和共享基站
CN113872981A (zh) * 2021-09-30 2021-12-31 阿里巴巴达摩院(杭州)科技有限公司 核心网和通信网络
CN114417336A (zh) * 2022-01-24 2022-04-29 北京新桥信通科技股份有限公司 一种应用系统侧安全管控方法及系统
CN114745258A (zh) * 2020-12-23 2022-07-12 中移(苏州)软件技术有限公司 网元功能体的生成方法、装置、设备及存储介质
US11800584B2 (en) * 2019-07-12 2023-10-24 Parallel Wireless, Inc. 5G mobile network with intelligent 5G non-standalone (NSA) radio access network (RAN)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112469043B (zh) * 2019-09-09 2022-10-28 华为技术有限公司 一种鉴权的方法及装置
CN110996372B (zh) * 2019-11-11 2021-05-18 广州爱浦路网络技术有限公司 消息路由方法、装置、系统及电子设备
CN110944365B (zh) * 2019-11-28 2021-10-22 武汉虹旭信息技术有限责任公司 一种基于5g核心网的多参考点关联方法及系统
CN110944367B (zh) * 2019-12-20 2021-12-24 广东工业大学 一种4g与5g互操作的方法
WO2021194214A1 (ko) * 2020-03-27 2021-09-30 엘지전자 주식회사 서비스 연속성을 위한 n14 인터페이스 지원 지시자

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101848443A (zh) * 2009-03-27 2010-09-29 华为技术有限公司 通信业务切换处理方法、网络系统与互通功能实体
CN101924708A (zh) * 2009-06-12 2010-12-22 中兴通讯股份有限公司 一种实现不同消息之间业务交互的方法及系统
CN102244928A (zh) * 2010-05-13 2011-11-16 中兴通讯股份有限公司 一种语音呼叫被呼、起呼建立方法、装置及系统
CN102804853A (zh) * 2009-06-25 2012-11-28 日本电气株式会社 管理从2g/3g网络到lte网络的csirat切换的方法
US9749904B1 (en) * 2013-03-29 2017-08-29 Syniverse Communications, Inc. Circuit switch voice roaming to LTE network

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101854600B (zh) * 2009-04-02 2013-08-28 华为技术有限公司 一种电路域回落的方法、装置和系统
CN103188617B (zh) * 2011-12-27 2016-11-23 华为技术有限公司 实现集群业务的方法、实体及系统
KR102476574B1 (ko) * 2015-07-31 2022-12-09 인텔 코포레이션 비 ip 기반 eps 베어러를 사용하는 장치, 시스템 및 방법
US10057739B2 (en) * 2015-10-21 2018-08-21 International Business Machines Corporation Distributed and localized policy and charging control in cellular networks to enable route flexibility
US10257078B2 (en) * 2016-04-01 2019-04-09 Qualcomm Incorporated Interworking with legacy radio access technologies for connectivity to next generation core network
ES2827398T3 (es) * 2016-04-01 2021-05-21 Samsung Electronics Co Ltd Procedimiento y aparato para comunicación inalámbrica en sistema de comunicación inalámbrica
CN106851738A (zh) * 2017-01-25 2017-06-13 南京邮电大学 面向lte小基站超密集组网的软件定义无线网络体系架构及方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101848443A (zh) * 2009-03-27 2010-09-29 华为技术有限公司 通信业务切换处理方法、网络系统与互通功能实体
CN101924708A (zh) * 2009-06-12 2010-12-22 中兴通讯股份有限公司 一种实现不同消息之间业务交互的方法及系统
CN102804853A (zh) * 2009-06-25 2012-11-28 日本电气株式会社 管理从2g/3g网络到lte网络的csirat切换的方法
CN102244928A (zh) * 2010-05-13 2011-11-16 中兴通讯股份有限公司 一种语音呼叫被呼、起呼建立方法、装置及系统
US9749904B1 (en) * 2013-03-29 2017-08-29 Syniverse Communications, Inc. Circuit switch voice roaming to LTE network

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11800584B2 (en) * 2019-07-12 2023-10-24 Parallel Wireless, Inc. 5G mobile network with intelligent 5G non-standalone (NSA) radio access network (RAN)
CN111699724A (zh) * 2020-05-08 2020-09-22 北京小米移动软件有限公司 控制终端的方法及装置、存储介质
CN111699724B (zh) * 2020-05-08 2023-06-06 北京小米移动软件有限公司 控制终端的方法及装置、存储介质
CN112616166A (zh) * 2020-12-04 2021-04-06 中国联合网络通信集团有限公司 一种数据处理方法及装置
CN112616166B (zh) * 2020-12-04 2023-02-17 中国联合网络通信集团有限公司 一种数据处理方法及装置
CN114745258A (zh) * 2020-12-23 2022-07-12 中移(苏州)软件技术有限公司 网元功能体的生成方法、装置、设备及存储介质
CN114745258B (zh) * 2020-12-23 2023-09-05 中移(苏州)软件技术有限公司 网元功能体的生成方法、装置、设备及存储介质
CN113691936A (zh) * 2021-08-25 2021-11-23 中国联合网络通信集团有限公司 基于共享基站的终端接入方法和共享基站
CN113691936B (zh) * 2021-08-25 2023-03-24 中国联合网络通信集团有限公司 基于共享基站的终端接入方法和共享基站
CN113872981A (zh) * 2021-09-30 2021-12-31 阿里巴巴达摩院(杭州)科技有限公司 核心网和通信网络
CN113872981B (zh) * 2021-09-30 2023-11-07 阿里巴巴达摩院(杭州)科技有限公司 核心网和通信网络
CN114417336A (zh) * 2022-01-24 2022-04-29 北京新桥信通科技股份有限公司 一种应用系统侧安全管控方法及系统

Also Published As

Publication number Publication date
CN109661006A (zh) 2019-04-19
CN109661006B (zh) 2021-11-30

Similar Documents

Publication Publication Date Title
WO2019072188A1 (zh) 消息交互的方法及装置及互操作功能
WO2019174505A1 (zh) 一种基于网络切片的通信方法及装置
KR20210127679A (ko) 단말이 Temporary User ID(임시 사용자 식별자)를 이용해 5G 네트워크에 등록하는 방안
CN112544106A (zh) 用于当ue在4g和5g网络之间移动时支持网络切片的方法和装置
EP3567921A1 (en) Network switching method and related equipment
EP4124088A1 (en) Authorization method, policy control function device, and access and mobility management function device
EP4224777A1 (en) Key acquisition method and communication apparatus
EP3703420B1 (en) Session context processing method, network elements, and terminal device
CN111586770B (zh) 一种会话管理的方法及装置
JP2021518085A (ja) 通信方法、通信装置、および通信システム
EP4171102A1 (en) Communication method, device and system
JP2021503857A (ja) ベアラ識別子を決定する方法及び装置、並びに記憶媒体
EP4192106A1 (en) Communication method and apparatus
CN109792447B (zh) 应用数据迁移方法及网络设备
WO2020001402A1 (zh) 一种管理监控事件的方法及装置
EP4221005A1 (en) Multipath transmission method and communication apparatus
WO2019037500A1 (zh) 一种选择无线接入网设备的方法及装置
EP3897010A1 (en) Communication method and apparatus
EP3772864A1 (en) Method and apparatus for improving voice service quality in wireless communication system
CN113811025A (zh) 一种释放中继连接的方法、设备及系统
CN114868408A (zh) 一种消息转发方法及装置
AU2020433395B2 (en) Communication method and apparatus
KR20220116821A (ko) 무선 통신 시스템에서 네트워크 슬라이스를 지원하기 위한 방법 및 장치
WO2017214850A1 (zh) 一种用户上下文获取、查找方法和相关设备
WO2021136301A1 (zh) 通信方法及装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18866845

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 11.09.2020)

122 Ep: pct application non-entry in european phase

Ref document number: 18866845

Country of ref document: EP

Kind code of ref document: A1