CN114827979B - Different network roaming processing method and device - Google Patents

Different network roaming processing method and device Download PDF

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Publication number
CN114827979B
CN114827979B CN202210582796.0A CN202210582796A CN114827979B CN 114827979 B CN114827979 B CN 114827979B CN 202210582796 A CN202210582796 A CN 202210582796A CN 114827979 B CN114827979 B CN 114827979B
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network
home network
plmn
frequency
frequency point
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CN114827979A (en
Inventor
田元兵
苗守野
龙青良
李菲
张鹏
张强
薛超粤
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China United Network Communications Group Co Ltd
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China United Network Communications Group Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • 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
    • H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The application provides a method and equipment for processing heterogeneous network roaming, which are applied to the technical field of wireless communication and comprise the following steps: the method comprises the steps that UE receives a first PLMN broadcasted by a shared base station of a visiting network, and accesses the visiting network based on the first PLMN, wherein an AMF entity of the visiting network and an AMF entity of a home network of the UE are in communication connection; and monitoring whether the UE meets the access condition of the access home network according to the frequency priority information of the first PLMN, and accessing the home network when the UE meets the access condition. The method and the device can realize that the UE switches the home network from the visiting network under the condition that the UE does not need to carry out shutdown and startup operations, and maintain the continuity of the user communication service.

Description

Different network roaming processing method and device
Technical Field
The embodiment of the application relates to the technical field of communication, in particular to a method and equipment for processing heterogeneous network roaming.
Background
With the development of wireless communication technology, the investment and construction costs of the fifth generation mobile communication technology (5 th Generation Mobile Networks, abbreviated as 5G) network are higher and higher. In some remote areas, because the use demands of users are small, the network utilization rate is generally low, and the investment benefit is low, so that the roaming of different networks becomes necessary.
Foreign network roaming refers to the fact that an end user may roam into other available carrier networks while maintaining the registration carrier unchanged. However, when the roaming area boundary is switched from the visited network to the home network, the current heterogeneous network roaming technology requires that the user firstly shuts down the visited network area and then starts up to register after moving to the home network area, the switching process is complicated, the continuity of the user communication service cannot be maintained, and the user experience is not high.
Disclosure of Invention
The application provides a method and Equipment for processing heterogeneous network roaming, which can solve the technical problems that in the existing heterogeneous network roaming technology, the process of switching User Equipment (UE) from a visiting network back to a home network is complicated and communication service continuity cannot be maintained.
In a first aspect, the present application provides a method for heterogeneous network roaming processing, applied to a UE, where the method includes:
a first public land mobile network (Public Land Mobile Network, abbreviated as PLMN) broadcasted by a shared base station of a visiting network is received, and the visiting network is accessed based on the first PLMN, and a communication connection is formed between an access and mobility management function (Access and Mobility Management Function, abbreviated as AMF) entity of the visiting network and an AMF entity of a home network of the UE;
monitoring whether the UE meets the access condition of accessing the home network according to the frequency priority information of the first PLMN;
and accessing the home network when the UE meets the access condition.
In some embodiments, after receiving the first PLMN broadcast by the shared base station of the visited network, the method further includes:
receiving frequency priority information of the first PLMN sent by the sharing base station, wherein the first PLMN and the PLMN of the home network are peer PLMNs, and the frequency priority of the first PLMN is lower than that of the PLMN of the home network.
In some embodiments, an N14 interface is configured between the AMF entity of the visited network and the AMF entity of the home network, and the AMF entity of the visited network and the AMF entity of the home network are communicatively connected by using the N14 interface.
In some embodiments, the UE is in an idle state, the accessing the home network comprises:
receiving frequency point information of a plurality of frequency points sent by the sharing base station and cell reselection priority information corresponding to each frequency point;
and initiating cell reselection to the home network according to the frequency point information of the plurality of frequency points and the cell reselection priority information corresponding to each frequency point so as to access the home network.
In some embodiments, the UE is in a connected state, the accessing the home network comprises:
receiving redirection frequency point information sent by the sharing base station;
and according to the redirection frequency point information, initiating redirection to the home network so as to access the home network.
In a second aspect, the present application provides a method for heterogeneous roaming processing, applied to a shared base station of a visited network, where the method includes:
broadcasting a first PLMN so that the UE accesses the visiting network based on the first PLMN, wherein the AMF entity of the visiting network and the AMF entity of the home network of the UE are in communication connection;
and sending the frequency priority information of the first PLMN to the UE, wherein the frequency priority of the first PLMN is lower than that of the PLMN of the home network.
In some embodiments, the UE is in an idle state, the method comprising:
and sending frequency point information of a plurality of frequency points and cell reselection priority information corresponding to each frequency point to the UE.
In some embodiments, the UE is in a connected state, the method comprising:
and sending the redirection frequency point information to the UE.
In some embodiments, the method further comprises:
and sending the context information of the UE to the AMF entity of the home network by using the AMF entity of the visiting network.
In a third aspect, the present application provides a heterogeneous network roaming processing apparatus, applied to a UE, where the apparatus includes:
a receiving module, configured to receive a first PLMN broadcasted by a shared base station of a visited network, and access the visited network based on the first PLMN, where a communication connection is made between an AMF entity of the visited network and an AMF entity of a home network of the UE;
a monitoring module, configured to monitor whether the UE meets an access condition for accessing the home network according to the frequency priority information of the first PLMN;
and the switching module is used for accessing the home network when the UE meets the access condition.
In a fourth aspect, the present application provides a heterogeneous network roaming processing apparatus, applied to a shared base station of a visited network, where the apparatus includes:
a broadcasting module, configured to broadcast a first PLMN, so that a UE accesses the visited network based on the first PLMN, where a communication connection is between an AMF entity of the visited network and an AMF entity of a home network of the UE;
and a sending module, configured to send frequency priority information of the first PLMN to the UE, where the frequency priority of the first PLMN is lower than the frequency priority of the PLMN of the home network.
In a fifth aspect, the present application provides a user equipment, including: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executes computer-executable instructions stored in the memory to cause the at least one processor to perform the foreign network roaming processing method as provided in the first aspect.
In a sixth aspect, the present application provides a network device, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing computer-executable instructions stored in the memory causes the at least one processor to perform the foreign network roaming processing method as provided in the second aspect.
In a seventh aspect, the present application provides a computer readable storage medium having stored therein computer executable instructions that, when executed by a processor, implement the method for heterogeneous network roaming processing as provided in the first aspect;
alternatively, the method for heterogeneous network roaming processing as provided in the second aspect is implemented when the processor executes the computer-executable instructions.
According to the method and the device for processing the heterogeneous network roaming, when the home network side UE moves from the visiting network shared boundary area to the home network, the home network side UE is triggered to switch to the home network through the frequency priority information of the first PLMN; because the AMF entity of the visiting network is in communication connection with the AMF entity of the home network, the AMF entity of the home network can directly acquire information such as user context from the AMF entity of the visiting network in the process of switching the UE to the home network, and the UE is not required to perform shutdown and startup operations, so that the continuity of user communication service can be maintained.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments of the present application or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
Fig. 1 is a schematic architecture diagram of a wireless communication system according to an embodiment of the present application;
fig. 2 is a schematic diagram of a 5G network architecture according to an embodiment of the present application;
fig. 3 is a flow chart of a method for processing heterogeneous network roaming according to an embodiment of the present application;
fig. 4 is a schematic program module diagram of a heterogeneous network roaming processing device according to an embodiment of the present application;
fig. 5 is a schematic program module of another heterogeneous network roaming processing device according to an embodiment of the present application;
fig. 6 is a schematic hardware structure of an electronic device according to an embodiment of the present application.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure. Furthermore, while the disclosure is presented in the context of an exemplary embodiment or embodiments, it should be appreciated that the various aspects of the disclosure may, separately, comprise a complete embodiment.
It should be noted that the brief description of the terms in the present application is only for convenience in understanding the embodiments described below, and is not intended to limit the embodiments of the present application. Unless otherwise indicated, these terms should be construed in their ordinary and customary meaning.
The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between similar or similar objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.
Furthermore, the terms "comprise" and "have," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to those elements expressly listed, but may include other elements not expressly listed or inherent to such product or apparatus.
The term "module" as used in this application refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and/or software code that is capable of performing the function associated with that element.
The embodiments of the present application may be applied to various communication systems, for example: a long term evolution advanced (Advanced long term evolution, LTE-a) system, a New Radio (NR) system, an evolution system of the NR system, an LTE-based access to unlicensed spectrum, LTE-U system over unlicensed spectrum, an NR-based access to unlicensed spectrum, NR-U system over unlicensed spectrum, a universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), a next-generation communication system, or other communication system, etc.
Generally, the number of connections supported by the conventional communication system is limited and easy to implement, however, with the development of communication technology, the mobile communication system will support not only conventional communication but also, for example, device-to-Device (D2D) communication, machine-to-machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), inter-vehicle (Vehicle to Vehicle, V2V) communication, and the like, to which the embodiments of the present application can also be applied.
Referring to fig. 1, fig. 1 is a schematic architecture diagram of a wireless communication system according to an embodiment of the present application. The wireless communication system provided in this embodiment includes a UE101, a visited network, and a home network. Wherein the visited network and the home network may be networks provided by different operators.
Alternatively, the UE101 can refer to various forms of user equipment, mobile devices, wireless communication devices. But may also be a handheld device, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved public land mobile network (Public Land Mobile Network, abbreviated PLMN), etc., as long as the UE101 is capable of wireless communication with the network device 102.
In the embodiment of the application, network equipment is deployed in both the visited network and the home network.
Optionally, the network device, i.e. public mobile communication network device, is an interface device for accessing the internet by the UE101, and is also a form of a radio Station, which refers to a radio transceiver Station for performing information transfer with the UE101 in a certain radio coverage area, and includes a Base Station (BS), which may also be referred to as a Base Station device, and is an apparatus deployed in a radio access network (Radio Access Network, RAN) to provide a wireless communication function. For example, the devices for providing the base station function in the 4G network include evolved NodeB (eNB), in the wireless local area network (Wireless Local Area Networks, WLAN for short), the devices for providing the base station function are Access points (APs for short), the devices for providing the base station function in the 5G NR, gNB, and the NodeB (ng-eNB) that continues to evolve.
Because the 5G network construction investment is large and the operation cost is high, in order to promote the open sharing of the 5G network and reduce repeated construction, the 5G network and service development are intensively and efficiently realized, and a cooperation mechanism of roaming through different networks is needed among operators, the 5G network planning is reasonably formulated, repeated construction is avoided, the resource multiplexing is enhanced, and the 5G network development efficiency is improved. For example, in an area with low population density, low base station utilization rate and low investment benefit, only one operator can build a 5G support network, and the operator without building the network can provide 5G service for users in a heterogeneous network roaming mode.
Foreign network roaming generally refers to: thanks to the communication network provided by one operator, communication services are provided by the UE due to its mobility moving under the communication network provided by another operator. The heterogeneous network roaming generally adopts a shared base station to provide roaming, and the shared base station generally provides a shared frequency point and can be accessed by UE of different operators.
The core network roaming scheme in heterogeneous network roaming refers to that one operator builds a complete 5G network (including a wireless network and a core network), and other operator users access the network in a roaming mode to use mobile communication services.
Referring to fig. 2, fig. 2 is a schematic diagram of a 5G network architecture according to an embodiment of the present application.
Wherein, the access network in the 5G system may be a radio access network (Radio Access Network, (R) AN), and the (R) AN device in the 5G system may be composed of a plurality of 5G- (R) AN nodes.
As shown in fig. 2, the 5G core network (5G core/new generation core,5 GC/NGC) includes a plurality of functional units such as an AMF entity, a session management function (Session Management Function, SMF) network element, a user plane function (User Plane Function, UPF) network element, an authentication server function (Authentication Server Function, AUSF) network element, a policy control function (Policy Control Function, PCF) network element, an application function (Application Function, AF) network element, a unified data management function (unified data management, UDM) network element, a network slice selection function (Network Slice Selection Function, NSSF) network element, and the like.
The AMF network element is mainly responsible for services such as mobility management, access management, etc. The SMF network element is mainly responsible for session management, UE address management and allocation, dynamic host configuration protocol functions, selection and control of user plane functions, etc. The UPF is mainly responsible for packet routing forwarding, packet filtering, performing quality of service (Quality of Service, qoS) control related functions, etc. for external connections to the Data Network (DN). The AUSF is mainly responsible for authentication functions for UEs, etc. The PCF network element is mainly responsible for providing a unified policy framework for network behavior management, providing policy rules for control plane functions, obtaining registration information related to policy decisions, etc.
The functional units in the 5GC may communicate through a Next Generation Network (NG) interface, such as: the UE can transmit control plane information with AMF network element through NG interface 1 (N1), the RAN device can establish user plane data transmission channel with UPF through NG interface 3 (N3), the AN/RAN device can establish control plane signaling connection with AMF network element through NG interface 2 (N2), UPF can interact with SMF network element through NG interface 4 (N4), UPF can interact user plane data with data network DN through NG interface 6 (N6), AMF network element can interact with SMF network element through NG interface 11 (N11), SMF network element can interact with PCF network element through NG interface 7 (N7), AMF network element can interact with AUSF through NG interface 12 (N12). It should be noted that fig. 2 is only an exemplary architecture diagram, and the network architecture may include other functional units besides the functional units shown in fig. 2.
The technical standard of traditional core network roaming only considers the scenario that the home network has no signal, namely similar to international roaming scenario. Before the home network side user registers successfully in the 5G sharing area of the visiting network, a 5G global unique temporary identifier (5G Globally Unique Temporary Identifier, abbreviated as 5G-GUTI) is allocated, before the home network side user moves out of the sharing area, the home network side user needs to be shut down firstly because the new AMF of the home network cannot acquire user information from the old AMF of the visiting network, and the home network side user needs to move to a non-sharing area, namely a home network signal area, the user is restarted and registers in the home network, the new AMF of the home network acquires hidden user identifier (Subscription Concealed Identifier, abbreviated as SUCI) information from the UE through an Identity Request message, a network storage function (Network Repository Function, abbreviated as NRF) +a secure edge protection proxy gateway (Security Edge Protection Proxy, abbreviated as SEPP) discovers that the home network AUSF/UDM information is acquired, authentication is successful, user subscription information is acquired, the new AMF of the home network sends a registration acceptance (Registration Accept) message to the user, a configuration update command (Configuration Update Command) message is sent, and the UE registration information can be queried in the AMF.
The scheme can realize successful registration of the home network side user after the home network side user moves back to the home network, but needs the operations of shutting down the shared area of the network visited by the user, starting up the network after moving to the home network, and the like, does not accord with the normal behavior of the user, and influences the user experience.
In view of the above technical problems, in the embodiments of the present application, a method and an apparatus for processing heterogeneous roaming are provided, where UE does not need to perform power-off and power-on operations, and by turning on an N14 interface between a visited network and a home network and by sharing a dedicated frequency priority configured by a base station based on a PLMN, when UE on the home network side moves from a visited network sharing boundary area to the home network, UE can switch to the home network, and maintain continuity of user communication service, thereby effectively improving user experience. The following will explain in detail the embodiments.
Referring to fig. 3, fig. 3 is a flow chart of a method for processing heterogeneous roaming provided in the embodiment of the present application, and the execution body of the embodiment may be the UE in the embodiment shown in fig. 1. As shown in fig. 3, the method includes:
s301, receiving a first PLMN broadcasted by a sharing base station of a visiting network, and accessing the visiting network based on the first PLMN, wherein the AMF entity of the visiting network and the AMF entity of a home network of the UE are in communication connection.
It can be appreciated that, since in the prior art, each operator will set PLMNs of other operators to Forbidden PLMNs (for short, FPLMN), in order to implement heterogeneous network roaming, in the shared area of the visited network, the shared base station may broadcast a new PLMN (hereinafter referred to as a first PLMN) for the UE of the home network, so that the UE of the home network accesses the visited network through roaming.
In some embodiments, the AMF (visual-AMF, abbreviated as V-AMF) of the Visited network may set the PLMNs of the first PLMN and the home network side to be peer PLMNs (abbreviated as EPLMNs) according to the tracking area code (Tracking Area Code, abbreviated as TAC), and the AMF issues an EPLMN list to the UE through Registration accept messages in the registration process.
In addition, the AMF (abbreviated as H-AMF)/mobility management entity (Mobility Management Entity, abbreviated as MME) of the home network may set the first PLMN and the PLMN of the home network side to EPLMN according to TAC.
In some embodiments, an N14 interface is configured between the core network AMF of the visited network and the core network AMF of the home network, and interworking between the visited AMF and the home AMF is implemented through the N14 interface, and when the UE at the home network moves from the visited network shared boundary area to the home network, the home AMF may directly obtain information such as a user context from the visited AMF, so as to implement continuity of a session and a service between the visited network and the home network.
In some embodiments, the shared base stations visiting the shared area and border of the network may configure dedicated frequency priorities based on different PLMNs. Wherein the frequency priority of the first PLMN is lower than the frequency priority of the PLMN of the home network.
In some embodiments, the shared base station visiting the network shared area and boundary may send the frequency priority information of the first PLMN to the UE.
S302, according to the frequency priority information of the first PLMN, whether the UE meets the access condition of the access home network is monitored.
S303, accessing the home network when the UE meets the access condition.
In some embodiments, when the UE moves from the visited network to the home network, if a signal transmitted by the home network is detected and the signal can satisfy the residence condition of the UE, the UE is switched from the visited network to the home network because the frequency priority of the PLMN of the home network is higher than the frequency priority of the first PLMN.
Illustratively, it is assumed that a source Tracking Area (TA) belongs to a visited network Area AMF service Area (e.g., TA 1), and a target TA (e.g., TA 2) belongs to a home network Area AMF service Area. Meanwhile, the 5G frequency band of the visiting network is assumed to be F1, and the 5G frequency band of the home network is assumed to be F2; the 5G base station of the visiting network configures TAC as TA1, and the 5G base station of the home network configures TAC as TA2.
In some embodiments, the shared base station may configure the common broadcast frequency priority: f1> F2; if the frequency priority of F1 is set to 6 and the frequency priority of F2 is set to 5, it can be ensured that the UE of the visiting network side preferentially selects the frequency point F1 of the visiting network to camp.
In some embodiments, the shared base station may set a dedicated frequency priority for the first PLMN: f2> F1; if F2 is set to 5 and F1 is set to 4, it is ensured that the home network UE preferentially selects the frequency point F2 of the home network to camp when detecting the presence of the home network.
According to the method and the device for processing the heterogeneous network roaming, when the home network side UE moves from the visiting network shared boundary area to the home network based on the frequency priority information of the first PLMN, the home network side UE is triggered to switch to the home network; because the AMF entity of the visiting network is in communication connection with the AMF entity of the home network, the AMF entity of the home network can directly acquire information such as user context from the AMF entity of the visiting network in the process of switching the UE to the home network, and the UE is not required to perform shutdown and startup operations, so that the continuity of user communication service can be maintained.
Based on the descriptions in the foregoing embodiments, in some embodiments, the foregoing heterogeneous network roaming processing method includes:
step one, the home network side UE finishes registration to the visiting network in the visiting network, and establishes a protocol data unit (Protocol Data Unit, abbreviated as PDU) session, and the home network side UE is in an IDLE state (Connection Management-IDLE, abbreviated as CM-IDLE state).
And step two, when the home network side UE moves from the visiting network 5G sharing boundary area to the home network, the sharing base station transmits 5G adjacent frequency and special cell reselection priority information to the home network side UE according to PLMN information, and when the reselection condition is met, the home network side UE initiates cell reselection to the home network.
Step three, the home network side UE initiates cell reselection on the 5G network of the visiting network side, initiates a mobility registration update flow to the 5G network of the home network side, after the H-AMF receives a mobility registration update request of the UE, finds the NRF (abbreviated as V-NRF) of the visiting network through the NRF (abbreviated as H-NRF), SEPP and N27 interfaces of the home network, discovers a globally unique domain name (Fully Qualified Domain Name, abbreviated as FQDN) of the V-AMF, then the H-AMF can acquire user context information from the V-AMF, then the H-AMF queries the H-NRF according to the user context information to acquire AUSF (abbreviated as H-AUSF) information of the home network, the H-AMF authenticates the H-AUSF, then performs user registration to the UDM (abbreviated as H-UDM) of the home network, acquires user subscription data, subscribes to a subscription data change event, and the H-AMF of the home network carries an EPLMN list in Registration Accept information sent by the user.
And step four, the UE at the home network side migrates to the home network in the PDU session of the visiting network.
In other embodiments, the method for heterogeneous network roaming processing includes:
step one, the home network side UE finishes registration to the visiting network in the visiting network, establishes PDU session, and the home network side UE is in a connection state (Connection Management-connected, CM-connected state for short).
And step two, when the home network side UE moves from the visiting network 5G sharing boundary area to the home network, the sharing base station transmits a redirection 5G frequency point to the home network side terminal according to PLMN information, and when the reselection condition is met, the home network side UE initiates redirection to the home network.
After the home network side UE initiates redirection from the visiting network to the home network at the wireless side, the home network side UE initiates a mobility registration update flow to the home network, after the H-AMF receives a mobility registration update request of the UE, the H-AMF finds out the V-NRF through the interfaces of the H-NRF, the SEPP and the N27, and after the FQDN of the V-AMF is found out, the H-AMF can acquire user context information from the V-AMF. The H-AMF carries the EPLMN list in a Registration Accept message sent by the user.
And step four, the UE at the home network side migrates the PDU session in the visiting network to the home network.
In this embodiment, the IP addresses of the data service session and the IP multimedia subsystem (IP Multimedia Subsystem, abbreviated as IMS) session can be kept continuous, and the data service and the voice service can be kept continuous.
According to the heterogeneous network roaming processing method, under the condition that shutdown and startup operations are not needed, by opening an N14 interface between a visiting network and a core network of a home network and configuring a special frequency priority based on PLMN through a sharing base station, when a home network side UE moves from a visiting network sharing boundary area to the home network, in an idle state, a 5G sharing base station issues 5G adjacent frequency and special cell reselection priority information to the UE according to PLMN information, cell reselection to the home network is initiated, and then the home network is quickly returned from the visiting network; in the service connection state, the service continuity can be maintained by redirecting to the home network, and the user experience is improved.
Based on the description in the foregoing embodiments, the embodiment of the present application also provides a heterogeneous network roaming processing device, which is applied to UE. Referring to fig. 4, fig. 4 is a schematic program module of a foreign network roaming processing device according to an embodiment of the present application, where the foreign network roaming processing device 40 includes:
a receiving module 401, configured to receive a first PLMN broadcasted by a shared base station of a visited network, and access the visited network based on the first PLMN, where a communication connection is between an AMF entity of the visited network and an AMF entity of a home network of the UE.
A monitoring module 402, configured to monitor whether the UE meets an access condition for accessing the home network according to the frequency priority information of the first PLMN.
A switching module 403, configured to access the home network when the UE meets the access condition.
In some embodiments, the receiving module 401 is further configured to:
receiving frequency priority information of the first PLMN sent by the sharing base station, wherein the first PLMN and the PLMN of the home network are peer PLMNs, and the frequency priority of the first PLMN is lower than that of the PLMN of the home network.
In some embodiments, an N14 interface is configured between the AMF entity of the visited network and the AMF entity of the home network, and the AMF entity of the visited network and the AMF entity of the home network are communicatively connected by using the N14 interface.
In some embodiments, the UE is in an idle state, and the switching module 403 is configured to:
receiving frequency point information of a plurality of frequency points sent by the sharing base station and cell reselection priority information corresponding to each frequency point; and initiating cell reselection to the home network according to the frequency point information of the plurality of frequency points and the cell reselection priority information corresponding to each frequency point so as to access the home network.
In some embodiments, the UE is in a connected state, and the switching module 403 is configured to:
receiving redirection frequency point information sent by the sharing base station; and according to the redirection frequency point information, initiating redirection to the home network so as to access the home network.
According to the heterogeneous network roaming processing device 40 provided by the application, under the condition that shutdown and startup operations are not needed, by opening an N14 interface between a visiting network and a core network of a home network and configuring a special frequency priority based on PLMN through a sharing base station, when a home network side UE moves from a visiting network sharing boundary area to the home network, the UE can be switched to the home network, and the continuity of user communication service is maintained.
Based on the above description of the embodiments, the embodiments of the present application also provide a heterogeneous network roaming processing device, which is applied to a shared base station of a visited network. Referring to fig. 5, fig. 5 is a schematic program module of another heterogeneous network roaming processing device provided in an embodiment of the present application, where the heterogeneous network roaming processing device 50 includes:
a broadcasting module 501, configured to broadcast a first PLMN; so that the UE accesses the visiting network based on the first PLMN, and the AMF entity of the visiting network and the AMF entity of the home network of the UE are in communication connection;
a sending module 502, configured to send, to the UE, frequency priority information of the first PLMN, where the frequency priority of the first PLMN is lower than the frequency priority of the PLMN of the home network.
In some embodiments, the UE is in an idle state, and the sending module 502 is further configured to:
and sending frequency point information of a plurality of frequency points and cell reselection priority information corresponding to each frequency point to the UE.
In some embodiments, the UE is in a connected state, and the sending module 502 is further configured to: and sending the redirection frequency point information to the UE.
According to the heterogeneous network roaming processing device 50 provided by the application, the shared base station sends the frequency priority information of the first PLMN to the home network side UE, so that when the home network side UE moves from the visiting network shared boundary area to the home network, the home network side UE is triggered to switch to the home network; because the AMF entity of the visiting network is in communication connection with the AMF entity of the home network, the AMF entity of the home network can directly acquire information such as user context from the AMF entity of the visiting network in the process of switching the UE to the home network, and the UE is not required to perform shutdown and startup operations, so that the continuity of user communication service can be maintained.
Further, based on the descriptions in the above embodiments, there is also provided a user equipment in the embodiments of the present application, where the user equipment includes at least one processor and a memory; wherein the memory stores computer-executable instructions; the above-mentioned at least one processor executes the computer-executable instructions stored in the memory to implement the steps executed by the ue in the above-mentioned embodiment, which is not described herein again.
Further, based on the descriptions in the above embodiments, there is also provided a network device in the embodiments of the present application, where the network device includes at least one processor and a memory; wherein the memory stores computer-executable instructions; the at least one processor executes the computer-executable instructions stored in the memory to implement the steps executed by the shared base station in the above embodiment, which is not described herein.
For a better understanding of the embodiments of the present application, referring to fig. 6, fig. 6 is a schematic hardware structure of an electronic device according to the embodiments of the present application. The electronic device may be the user device or the network device.
As shown in fig. 6, the electronic device 60 of the present embodiment includes: a processor 601 and a memory 602; wherein:
a memory 602 for storing computer-executable instructions;
the processor 601 is configured to execute computer-executable instructions stored in the memory, so as to implement the steps executed by the user equipment in the foregoing embodiment.
Alternatively, the processor 601 is configured to execute computer-executable instructions stored in the memory to implement the steps performed by the network device in the above embodiment.
Alternatively, the memory 602 may be separate or integrated with the processor 601.
When the memory 602 is provided separately, the device further comprises a bus 603 for connecting said memory 602 and the processor 601.
Further, based on the description in the foregoing embodiment, a computer readable storage medium is further provided in the embodiment of the present application, where computer executable instructions are stored in the computer readable storage medium, and when the processor executes the computer executable instructions, the steps executed by the user equipment side in the foregoing embodiment are implemented.
Further, based on what is described in the foregoing embodiments, there is also provided a computer-readable storage medium in which computer-executable instructions are stored, which when executed by a processor, implement the steps performed by the network device side in the foregoing embodiments.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the modules is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple modules may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.
The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical units, may be located in one place, or may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional module in each embodiment of the present application may be integrated in one processing unit, or each module may exist alone physically, or two or more modules may be integrated in one unit. The integrated units of the modules can be realized in a form of hardware or a form of hardware and software functional units.
The integrated modules, which are implemented in the form of software functional modules, may be stored in a computer readable storage medium. The software functional module is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (english: processor) to perform some of the steps of the methods described in the embodiments of the present application.
It should be understood that the above processor may be a central processing unit (english: central Processing Unit, abbreviated as CPU), or may be other general purpose processors, digital signal processors (english: digital Signal Processor, abbreviated as DSP), application specific integrated circuits (english: application Specific Integrated Circuit, abbreviated as ASIC), or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in a processor for execution.
The storage medium may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A method for heterogeneous network roaming processing, which is applied to a user equipment UE, the method comprising:
receiving a first Public Land Mobile Network (PLMN) broadcast by a shared base station of a visiting network, accessing the visiting network based on the first PLMN, and connecting communication between an access and mobility management function (AMF) entity of the visiting network and an AMF entity of a home network of the UE;
monitoring whether the UE meets the access condition of accessing the home network according to the frequency priority information of the first PLMN; wherein the frequency priority of the PLMN of the home network is higher than the frequency priority of the first PLMN;
when the UE meets the access condition, accessing the home network;
the UE is in an idle state, and the accessing the home network includes:
receiving frequency point information of a plurality of frequency points sent by the sharing base station and cell reselection priority information corresponding to each frequency point;
initiating cell reselection to the home network according to the frequency point information of the plurality of frequency points and the cell reselection priority information corresponding to each frequency point so as to access the home network;
the UE is in a connected state, and the accessing the home network includes:
receiving redirection frequency point information sent by the sharing base station;
and according to the redirection frequency point information, initiating redirection to the home network so as to access the home network.
2. The method of claim 1, wherein after receiving the first PLMN broadcast by the shared base station of the visited network, further comprising:
receiving frequency priority information of the first PLMN sent by the sharing base station, wherein the first PLMN and the PLMN of the home network are peer PLMNs, and the frequency priority of the first PLMN is lower than that of the PLMN of the home network.
3. The method of claim 1, wherein an N14 interface is configured between the AMF entity of the visited network and the AMF entity of the home network, and wherein the AMF entity of the visited network and the AMF entity of the home network are communicatively connected using the N14 interface.
4. A method for heterogeneous network roaming processing, which is applied to a shared base station of a visited network, the method comprising:
broadcasting a first PLMN so that the UE accesses the visiting network based on the first PLMN, wherein the AMF entity of the visiting network and the AMF entity of the home network of the UE are in communication connection;
transmitting frequency priority information of the first PLMN to the UE, wherein the frequency priority of the first PLMN is lower than that of the PLMN of the home network;
the UE is in an idle state, the method comprising:
transmitting frequency point information of a plurality of frequency points and cell reselection priority information corresponding to each frequency point to the UE, so that the UE receives the frequency point information of the plurality of frequency points and the cell reselection priority information corresponding to each frequency point transmitted by the shared base station, and initiating cell reselection to the home network according to the frequency point information of the plurality of frequency points and the cell reselection priority information corresponding to each frequency point to access the home network;
the UE is in a connected state, the method comprising:
and sending redirection frequency point information to the UE so that the UE receives the redirection frequency point information sent by the shared base station, and initiating redirection to the home network according to the redirection frequency point information to access the home network.
5. The method according to claim 4, wherein the method further comprises:
and sending the context information of the UE to the AMF entity of the home network by using the AMF entity of the visiting network.
6. A foreign network roaming processing apparatus, applied to a user equipment UE, the apparatus comprising:
a receiving module, configured to receive a first PLMN broadcasted by a shared base station of a visited network, and access the visited network based on the first PLMN, where a communication connection is made between an AMF entity of the visited network and an AMF entity of a home network of the UE;
a monitoring module, configured to monitor whether the UE meets an access condition for accessing the home network according to the frequency priority information of the first PLMN; wherein the frequency priority of the PLMN of the home network is higher than the frequency priority of the first PLMN;
a switching module, configured to access the home network when the UE meets the access condition;
the UE is in an idle state, and the switching module is specifically configured to receive frequency point information of a plurality of frequency points sent by the shared base station and cell reselection priority information corresponding to each frequency point; initiating cell reselection to the home network according to the frequency point information of the plurality of frequency points and the cell reselection priority information corresponding to each frequency point so as to access the home network;
the UE is in a connection state, and the switching module is specifically used for receiving redirection frequency point information sent by the shared base station; and according to the redirection frequency point information, initiating redirection to the home network so as to access the home network.
7. A foreign network roaming processing apparatus for use with a shared base station of a visited network, the apparatus comprising:
a broadcasting module, configured to broadcast a first PLMN, so that a UE accesses the visited network based on the first PLMN, where a communication connection is between an AMF entity of the visited network and an AMF entity of a home network of the UE;
a transmitting module, configured to transmit, to the UE, frequency priority information of the first PLMN, where the frequency priority of the first PLMN is lower than the frequency priority of the PLMN of the home network;
the UE is in an idle state, and the sending module is used for sending frequency point information of a plurality of frequency points and cell reselection priority information corresponding to each frequency point to the UE so that the UE receives the frequency point information of the plurality of frequency points and the cell reselection priority information corresponding to each frequency point sent by the shared base station, and initiates cell reselection to the home network according to the frequency point information of the plurality of frequency points and the cell reselection priority information corresponding to each frequency point to access the home network;
the UE is in a connection state, and the sending module is used for sending the redirection frequency point information to the UE so that the UE receives the redirection frequency point information sent by the shared base station, and initiates redirection to the home network according to the redirection frequency point information so as to access the home network.
8. A user device, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing computer-executable instructions stored in the memory causes the at least one processor to perform the foreign network roaming processing method of any of claims 1-3.
9. A network device, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing computer-executable instructions stored in the memory causes the at least one processor to perform the foreign network roaming processing method of any of claims 4-5.
10. A computer readable storage medium having stored therein computer executable instructions which, when executed by a processor, implement the foreign network roaming processing method of any of claims 1 to 3;
alternatively, the method for heterogeneous network roaming according to any of claims 4-5 is implemented when the processor executes the computer-executable instructions.
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