CN114599021A - Service processing method and system for terminal roaming in broadband cluster system - Google Patents

Service processing method and system for terminal roaming in broadband cluster system Download PDF

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CN114599021A
CN114599021A CN202011399020.2A CN202011399020A CN114599021A CN 114599021 A CN114599021 A CN 114599021A CN 202011399020 A CN202011399020 A CN 202011399020A CN 114599021 A CN114599021 A CN 114599021A
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terminal
tcf
network element
core network
subscription information
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CN114599021B (en
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周志宏
强婕
范晨
袁乃华
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Chengdu TD Tech Ltd
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Chengdu TD Tech 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
    • H04W8/06—Registration at serving network Location Register, VLR or user mobility server
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/08—User group management
    • 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
    • H04W8/08—Mobility data transfer

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

Abstract

The invention provides a service processing method and a system for terminal roaming in a broadband cluster system, which are applied to a first cluster control function TCF network element of a core network of a visited domain, and initiate a registration request to a second TCF network element of the core network of the home domain of a terminal when the terminal roams to the core network of the visited domain, wherein the registration request is used for the second TCF network element to return subscription information of the terminal to the first TCF network element when the second TCF network element determines that the terminal adopts a local export roaming mode; receiving subscription information of the terminal; responding to a cluster service request initiated by a terminal, and processing a cluster service according to subscription information of the terminal; the embodiment of the invention aims at the terminal roaming service in the B-trunk system, and adopts the cluster control function TCF network element of the visited place to control and process the cluster service, thereby avoiding the roaming data from returning to the home place in the prior art and improving the cluster service effect.

Description

Service processing method and system for terminal roaming in broadband cluster system
Technical Field
The present invention relates to communications technologies, and in particular, to a method and a system for processing a service of terminal roaming in a broadband trunking system.
Background
A Broadband Trunking Communication (B-TrunC) system is a special wireless Communication system developed to meet the demand of industry user command and dispatch and oriented to specific industry applications.
In the existing B-TrunC system, terminal roaming only supports a Home Routed manner, that is, trunking services of the terminal all need to be processed and controlled by a Trunking Control Function (TCF) network element device/Trunking Media Function (TMF) network element device of a Home domain network.
However, the transmission bandwidth before the visited network and the home network where the terminal roams is not always smooth and stable, and when the distance between the two networks is long, the terminal roaming data returning to the home location will increase the delay of the trunking service, resulting in poor trunking service implementation effect.
Disclosure of Invention
Aiming at the problems, the invention provides a service processing method and a system for terminal roaming in a broadband trunking system.
In a first aspect, the present invention provides a method for processing a service when a terminal roams in a broadband trunking system, which is applied to a first trunking control function TCF network element of a core network in a visited domain, and the method includes: when a terminal roams to a core network of a visited domain, initiating a registration request to a second TCF network element of the core network of the home domain of the terminal, wherein the registration request is used for returning subscription information of the terminal to a first TCF network element when the second TCF network element determines that the terminal adopts a local transmission and guidance roaming mode; receiving subscription information of the terminal; and responding to a cluster service request initiated by the terminal, and processing the cluster service according to the subscription information of the terminal.
In other optional embodiments, the method further comprises: and sending the first TCF network element identifier of the core network of the visited domain to which the terminal roams to the group control equipment of the group to which the terminal belongs.
In other optional embodiments, when the trunking service is a single call service, the processing the trunking service according to the subscription information of the terminal in response to the trunking service request initiated by the terminal includes: receiving a single-call service request initiated by a terminal, wherein the single-call service request carries a called terminal number; determining whether the called terminal belongs to the first TCF network element control according to the called terminal number; and if so, the first TCF network element processes the single call service according to the subscription information of the terminal.
In other optional embodiments, the method further comprises: if the called terminal does not belong to the control of the first TCF network element, forwarding the single call service request to a third TCF network element of the core network of the home domain of the called terminal, wherein the third TCF network element returns the TCF network element of the core network of the called terminal to the first TCF network element; and a communication channel is established between the first TCF network element and the TCF network element of the core network where the called terminal is located, so that the single-call service is processed on the communication channel according to subscription information.
In other optional embodiments, if the called terminal is not under the control of the first TCF network element, before forwarding the single-call service request to a third TCF network element of the core network of the home domain of the called terminal, the method further includes: inquiring whether the TCF network element of the core network where the called terminal is located is recorded in the first TCF network element; if yes, a step of establishing a communication channel between the first TCF network element and a TCF network element of a core network where the called terminal is located is executed; and if not, executing the step of forwarding the single-call service request to a third TCF network element of the core network of the home domain of the called terminal.
In other optional embodiments, when the trunking service is a group call service, the processing the trunking service according to the subscription information of the terminal in response to a trunking service request initiated by the terminal includes: receiving a group call service request initiated by a terminal, and forwarding the group call service request to the group control equipment, so that the group control equipment establishes a group call downlink channel to process the group call service according to TCF network elements where other terminals recorded in the group control equipment are located, wherein the other terminals and the terminal belong to the same group.
In other optional embodiments, the method further comprises: and when the subscription information of the terminal is changed, receiving the changed subscription information sent by the second TCF network element.
In a second aspect, the present invention provides a method for processing a service when a terminal roams in a broadband trunking system, which is applied to a second trunking control function TCF network element of a core network in a home domain, and the method includes: when the terminal roams to a visited domain core network, receiving a registration request sent by a first TCF network element of the visited domain core network; responding to the registration request, and determining the roaming mode of the terminal; and when the terminal is determined to adopt a local transmission and guidance roaming mode, sending subscription information of the terminal to the first TCF network element, wherein the subscription information is used for indicating the first TCF network element to process the trunking service according to the subscription information of the terminal.
In another optional embodiment, the determining the roaming manner of the terminal includes: judging whether the configuration parameters of the local transmission and guidance exist in the subscription information of the terminal, if so, determining that the terminal adopts a roaming mode of the local transmission and guidance; or judging whether the number of the terminal belongs to a preset number, if so, determining that the terminal adopts a local transmission and guidance roaming mode, wherein the terminal corresponding to the preset number adopts the local transmission and guidance roaming mode.
In other optional embodiments, the method further comprises: and recording the first TCF network element identification of the core network of the visited domain to which the terminal roams.
In a third aspect, the present invention provides a network element device with a cluster control function, including: the terminal comprises a first sending module and a second sending module, wherein the first sending module is used for initiating a registration request to a second TCF (trusted security function) network element of a core network of a home domain of a terminal when the terminal roams to a core network of a visited domain, and the registration request is used for returning subscription information of the terminal to a first TCF network element when the second TCF network element determines that the terminal adopts a local guidance roaming mode; a first receiving module, configured to receive subscription information of the terminal; and the first response module is used for responding to the cluster service request initiated by the terminal and processing the cluster service according to the subscription information of the terminal.
In a fourth aspect, the present invention provides a network element device with a cluster control function, including: the second receiving module is used for receiving a registration request sent by a first TCF network element of the visited domain core network when the terminal roams to the visited domain core network; a second response module, configured to determine a roaming manner of the terminal in response to the registration request; and the second sending module is used for sending the subscription information of the terminal to the first TCF network element when the terminal is determined to adopt the local transmission and guidance roaming mode, wherein the subscription information is used for indicating the first TCF network element to process the trunking service according to the subscription information of the terminal.
In a fifth aspect, the present invention provides a system for implementing a service when a terminal roams in a broadband trunking system, including a first trunking control function TCF network element of a core network in a visited domain and a second TCF network element of a core network in a home domain; wherein the first cluster control function, TCF, network element is configured to perform the method of any of the first aspects, and the second TCF network element is configured to perform the method of any of the second aspects.
The invention provides a service processing method and a system for terminal roaming in a broadband cluster system, which are applied to a first cluster control function TCF network element of a core network of a visited domain, and initiate a registration request to a second TCF network element of the core network of the home domain of a terminal when the terminal roams to the core network of the visited domain, wherein the registration request is used for the second TCF network element to return subscription information of the terminal to the first TCF network element when the second TCF network element determines that the terminal adopts a local export roaming mode; receiving subscription information of the terminal; responding to a cluster service request initiated by a terminal, and processing a cluster service according to subscription information of the terminal; the embodiment of the invention aims at the terminal roaming service in the B-trunk system, and adopts the cluster control function TCF network element of the visited place to control and process the cluster service, thereby avoiding the roaming data from returning to the home place in the prior art and improving the cluster service effect.
Drawings
Fig. 1 is a schematic diagram of a Home Routed roaming method according to the present invention;
FIG. 2 is a schematic diagram of a Local Breakout roaming method according to the present invention;
FIG. 3 is a schematic diagram of another Local Breakout roaming method according to the present invention;
fig. 4 is a terminal roaming architecture of a B-TrunC system according to the present invention;
fig. 5 is an interaction diagram of a service processing method when a terminal roams in a broadband trunking system according to the present invention;
fig. 6 is an interaction diagram of another service processing method for roaming terminal in broadband trunking system according to the present invention;
fig. 7 is an interaction diagram of a service processing method when a terminal roams in a broadband trunking system according to another embodiment of the present invention;
fig. 8 is a schematic structural diagram of a network element device with cluster control function according to the present invention;
fig. 9 is a schematic structural diagram of another network element device with cluster control function according to the present invention;
fig. 10 is a schematic diagram of a hardware structure of a network element device with a cluster control function according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the examples of the present invention will be clearly and completely described below with reference to the accompanying drawings in the examples of the present invention.
Long Term Evolution (LTE) is a Long Term Evolution of Universal Mobile Telecommunications System (UMTS) technology standard established by The 3rd Generation Partnership Project (3 GPP) organization.
Generally, the LTE network architecture includes the following three main components: user Equipment (UE), Evolved Universal Radio Access Network (E-UTRAN), and Evolved Packet Core Evolution (EPC).
Furthermore, the UE may be a mobile terminal such as a mobile phone, a tablet, or a computer, and is connected to the E-UTRAN through an LTE-Uu interface. The E-UTRAN may be composed of a plurality of evolved nodebs (enodebs), which are interconnected with each other through an X2 interface, and connected with the EPC through an S1 interface.
The EPC mainly includes five major network elements: a Mobility Management Entity (MME), a Service GateWay (SGW), a Packet Data Network GateWay (PDN GateWay or PGW), a Home Subscriber Server (HSS), a Policy and Charging Rules Function (Policy and Charging Rules Function, PCRF).
The MME is a control plane of a Serving General packet radio service (SGSN), and is responsible for processing signaling of a user service, performing management of a mobile subscriber, and interacting with an eNodeB, an HSS and an SGW. The MME interfaces with the HSS via an S6a interface, with the SGW via S11, and with the base station eNodeB via an S1-MME interface, which are all IP protocol based.
The SGW functions in concert with the MME. In short, the SGW is the service plane of the SGSN and is responsible for handling the user's service and for performing the bearer of the mobile data service. And interacts with devices such as eNodeB, MME and PGW. The SGW is connected to the MME through an S11 interface, connected to the PGW through an S5 or S8 interface (distinguished in roaming service processing, for example, the same operator uses an S5 interface, and different operators use an S8 interface), and connected to the base station eNodeB through an S1-U interface, where these interfaces are all based on an IP protocol.
The PGW functions very similar to a Gateway GPRS Support Node (GGSN), and is responsible for interfacing with the Internet and interacting with devices such as PCRF and PGW. The PGW is connected with the SGW through an S5 or S8 interface, connected with the PCRF through a Gx interface, and connected with the PDN through an SGi interface, and the interfaces are all based on an IP protocol. The PGW does not directly interface with the base station eNodeB.
The HSS is a central database containing subscriber related information and subscription related information. The functions of the HSS include mobility management, support for call and session establishment, user authentication and access authorization.
The 3GPP defines that a terminal roams in multiple networks, and the roaming modes include Home routing (Home Routed) and Local Breakout (Local Breakout).
Fig. 1 is a schematic diagram of a Home Routed roaming method provided by the present invention, as shown in fig. 1, when a terminal roams to a Visited domain core Network (VPLMN for short), roaming data needs to return to a PGW of a Home domain core Network (HPLMN for short).
FIG. 2 is a schematic diagram of a Local Breakout roaming method according to the present invention; fig. 3 is a schematic diagram of another Local Breakout roaming method provided by the present invention. As can be seen from fig. 2 and 3, when the terminal roams to a VPLMN, the roaming data adopts the PGW of the VPLMN.
In summary, the roaming modes of Home Routed and Local Breakout are different in that: the Home Routed adopts PGW of a Home domain core network; local Breakout uses PGW of visited domain core network.
B-TrunC systems have been developed to meet the needs of industry users for directed scheduling and the needs of proprietary wireless communication systems for specific industry applications. Fig. 4 is a terminal roaming architecture of a B-TrunC system provided by the present invention, and as shown in fig. 4, the B-TrunC system architecture includes: the LTE broadband trunking system comprises an LTE data terminal, an LTE broadband trunking terminal, an LTE base station (eNB), an LTE broadband trunking base station (T-eNB) and an LTE broadband trunking core network; the LTE data terminal supports IP-based packet data transmission services and does not support trunking services and functions, the LTE data terminal is connected to the LTE base station through a Uu interface, and the LTE base station is connected to the LTE broadband trunking core network through an S1 interface. The LTE broadband cluster terminal is connected to the LTE broadband cluster base station through a Uu-T interface, and the LTE broadband cluster base station is connected to an LTE broadband cluster core network through an S1-T interface, so that the packet domain basic service and the cluster service are realized. The LTE broadband cluster core network comprises five logic entities, namely an enhanced mobile management entity (eMMC, eMMC for short), a comprehensive gateway (xGW), an enhanced home subscriber server (eHSS), a cluster Control Function body (TCF for short) and a cluster Media Function body (TMF for short), wherein the five logic entities can be combined to form actual network element equipment according to actual deployment, the TCF is responsible for scheduling management of cluster services, and the TMF is responsible for data transmission of the cluster services.
Due to the characteristics of the cluster group call service in the B-trunk system, the roaming service only supports the Home Routed mode, that is, the packet data transmission service of the user in the roaming place needs the PGW of the Home place to serve; the cluster service of the user needs the TCF/TMF of the home for processing and control. That is, all roaming data need to return to the PGW and TCF/TMF of the home location, and at this time, there is a need for the transmission bandwidth between the two networks, and in an actual network, the transmission bandwidth between the two networks is not necessarily smooth, for example, the fixed network and the emergency communication vehicle are jointly networked, and communication is performed by using a satellite, and the bandwidth is unstable and expensive. In addition, in a scenario where the distance between the two networks is relatively long, roaming data returning to the home location may cause an increase in time delay of the cluster service, and the real-time performance of the cluster service is one of the key indicators, which may ultimately result in a poor implementation effect of the cluster service.
Aiming at the problem, the technical idea of the invention is as follows: when the terminal of the B-trunk system roams, the TCF network element of the visited place is adopted to control and process the trunking service, thereby avoiding roaming data from returning to the home network and improving the implementation effect of the trunking service.
In a first aspect, an example of the present invention provides a service processing method when a terminal in a broadband trunking system roams, and fig. 5 is an interaction diagram of the service processing method when the terminal in the broadband trunking system roams, which is provided by the present invention.
As shown in fig. 5, the service processing method includes:
step 101, when a terminal roams to a core network of a visited domain, a first TCF network element initiates a registration request to a second TCF network element of the core network of the home domain of the terminal.
And the registration request is used for returning the subscription information of the terminal to the first TCF network element when the second TCF network element determines that the terminal adopts the local transmission and guidance roaming mode.
Specifically, roaming of the terminal to the core network of the visited domain includes the following scenarios: the terminal roams from a home domain core network to a visited domain core network; or the terminal moves from the core network of the original visited domain to the core network of the current visited domain. When the terminal moves to the core network of the current visited domain from any network, after the terminal is started up at a visited place, the terminal firstly carries out the LTE attachment (LTE Attach) process of the terminal according to the B-trunC standard, and the Attach carries out PGW selection of Local Breakout according to the standard process; after the Attach procedure is completed, the terminal initiates a registration procedure of the trunking service according to the B-TrunC protocol, that is, in this step, a first TCF network element (which may also be referred to as a V-TCF) of the visited domain core where the terminal is located initiates a registration request to a second TCF network element (which may also be referred to as an H-PCF) of the home domain core network.
Correspondingly, at the core network side of the home domain, the second TCF network element receives the registration request sent by the first TCF network element of the core network of the visited domain.
And step 102, the second TCF network element determines the roaming mode of the terminal in response to the registration request.
Specifically, after the H-PCF receives the registration request, the second TCF network element determines the roaming mode of the terminal, that is, determines whether the terminal employs the Home Routed roaming mode or the Local Breakout roaming mode, and when it is determined that the terminal employs the Home Routed roaming mode, the PGW and the TCF/TMF of the Home domain core network are used for control and processing, which is similar to the prior art in implementation process and is not described herein again; when the terminal is determined to adopt the Local Breakout roaming mode, the following steps of the embodiment are continuously executed.
Optionally, one implementation of step 102 is as follows: and judging whether the configuration parameters of the local transmission and guidance exist in the subscription information of the terminal, and if so, determining that the terminal adopts a roaming mode of the local transmission and guidance.
Another implementation of step 102 is as follows: judging whether the number of the terminal belongs to a preset number, if so, determining that the terminal adopts a local transmission and guidance roaming mode, wherein the terminal corresponding to the preset number adopts the local transmission and guidance roaming mode.
Specifically, the second TCF network element of the home, that is, the H-TCF, may analyze whether the Local Breakout configuration mode is added to the subscription information of the HSS for the terminal, and if so, determine that the terminal adopts the Local Breakout roaming mode; or number segment mapping is adopted, and some number segments can use a Local Breakout roaming mode.
And 103, when the terminal is determined to adopt the local transmission and guidance roaming mode, the second TCF network element sends the subscription information of the terminal to the first TCF network element.
Specifically, after determining that the terminal adopts a Local Breakout roaming mode, the H-TCF sends subscription information of the terminal to the V-TCF.
Correspondingly, at the core network side of the visited domain, the first TCF network element (i.e., V-TCF) receives the subscription information of the terminal.
As an optional embodiment, the method further comprises: and the second TCF network element records the first TCF network element identification of the core network of the visited domain to which the terminal roams.
In particular, the H-TCF may also record the identity of the first TCF network element (i.e. V-TCF) of the core network of the current visited domain where the terminal roams, so that the terminal is used as a route when it is called.
And step 104, responding to the cluster service request initiated by the terminal by the first TCF network element, and processing the cluster service according to the subscription information of the terminal.
Specifically, when a terminal initiates a trunking service request in a core network of a visited domain, the terminal sends the trunking service request to a first TCF network element (i.e., a V-TCF), and the first TCF network element processes the trunking service according to subscription information of the terminal. Further, a TMF channel for transmitting data traffic may be constructed according to signaling data transmitted on a signaling channel between TCF network elements.
Compared with the existing B-trunk system, in the embodiment of the invention, the trunking service initiated by the user at the roaming place is processed by the TCF/TMF which returns to the home location through the TCF/TMF network element of the core network of the visited domain, and does not need to return to the TCF/TMF network element of the home location.
Optionally, when the terminal roams to the visited domain core network for the first time, the subscription information of the terminal needs to be acquired from the H-TCF; when the terminal roams to the visited domain core network again, the terminal does not need to initiate a registration request to the H-TCF because the subscription information of the terminal is obtained, that is, the information interaction between the V-TCF and the H-TCF is reduced, and the terminal can be accessed to carry out service when the H-TCF and the V-TCF are connected and communicated.
Optionally, when the subscription information of the terminal is changed, the changed subscription information sent by the second TCF network element is received.
Specifically, after the subscription information of the terminal is changed, the HSS in the home domain core network pushes the changed subscription information to the H-TCF, and then the H-TCF pushes the changed subscription information to the V-TCF in a scenario where the H-TCF is connected to the V-TCF.
As an optional embodiment, the first TCF network element sends the identifier of the first TCF network element of the visited domain core network to which the terminal roams to the group control device of the group to which the terminal belongs.
Specifically, after the V-TCF registration of the terminal is successful, the V-TCF reports the registration state of the terminal to the group control device G-TCF of the group to which the terminal belongs, where the registration state report includes the V-TCF identifier where the terminal is currently located and whether the terminal is online.
The invention provides a service processing method for terminal roaming in a broadband cluster system, which is characterized in that when a terminal roams to a visited domain core network, a registration request is initiated to a second TCF network element of a home domain core network of the terminal, wherein the registration request is used for returning the subscription information of the terminal to a first TCF network element when the second TCF network element determines that the terminal adopts a local guide roaming mode; receiving subscription information of the terminal; responding to a cluster service request initiated by a terminal, and processing a cluster service according to subscription information of the terminal; the embodiment of the invention aims at the terminal roaming service of the B-trunk system, and adopts the cluster control function TCF network element of the visited place to control and process the cluster service, thereby avoiding the need of returning roaming data to the home place in the prior art and improving the cluster service effect.
With reference to the foregoing implementation manners, fig. 6 is an interaction schematic diagram of another service processing method for terminal roaming in a broadband trunking system provided by the present invention, and as shown in fig. 6, when a trunking service is a single call service, the service processing method includes:
step 201, when a terminal roams to a core network of a visited domain, a first TCF network element initiates a registration request to a second TCF network element of the core network of the home domain of the terminal.
Step 202, responding to the registration request, and determining the roaming mode of the terminal.
Step 203, when it is determined that the terminal adopts the local transmission and guidance roaming mode, the second TCF network element sends the subscription information of the terminal to the first TCF network element.
And step 204, receiving a single call service request initiated by the terminal, wherein the single call service request carries a called terminal number.
Step 205, determining whether the called terminal belongs to the first TCF network element control according to the called terminal number.
If yes, go to step 206; if not, go to step 207.
And step 206, the first TCF network element processes the single call service according to the subscription information of the terminal. And (6) ending.
Step 207, the first TCF network element forwards the single call service request to a third TCF network element of the core network of the home domain of the called terminal.
And step 208, the third TCF network element returns the TCF network element of the core network where the called terminal is located to the first TCF network element.
Step 209, a communication channel is established between the first TCF network element and the TCF network element of the core network in which the called terminal is located, so as to process the single call service on the communication channel according to the subscription information.
Step 201, step 202, and step 203 in this embodiment are similar to the implementation manners of step 101, step 102, and step 103 in the foregoing embodiment, respectively, and are not described herein again.
Different from the foregoing embodiments, this embodiment defines a specific implementation manner of a single-call service, in this embodiment, a single-call service request initiated by a terminal is received, where the single-call service request carries a called terminal number; determining whether the called terminal belongs to the first TCF network element control according to the called terminal number; if so, the first TCF network element processes the single call service according to the subscription information of the terminal; if not, forwarding the single-call service request to a third TCF network element of the core network of the home domain of the called terminal, wherein the third TCF network element returns the TCF network element of the core network where the called terminal is located to the first TCF network element; and a communication channel is established between the first TCF network element and the TCF network element of the core network where the called terminal is located, so that the single-call service is processed on the communication channel according to subscription information.
Specifically, when a terminal actively initiates a single-call service request in a core network of a visited domain (subsequently, the terminal is called a calling terminal), the single-call service request initiated by the calling terminal can reach a V-TCF (virtual-to-clock) which can analyze a called terminal number carried in the single-call service request; if the called terminal is analyzed to belong to the UE (including a Local Breakout user managed by the V-TCF or a user managed by the H-TCF) managed by the Local TCF, the V-TCF directly processes the single call service according to the subscription information; if the called terminal is not the user managed by the local TCF (for example, the terminal has moved to the other networks), the first TCF network element sends the single-call service request to a third TCF network element of the core network of the home domain of the called terminal according to the number analysis of the called terminal, and the TCF identifier of the core network (which can be a visited domain or a home domain) where the called terminal is currently located is recorded in the third TCF network element; and the third TCF network element returns the TCF identifier where the called terminal is currently located to the first TCF so as to construct a signaling channel with the first TCF and the TCF where the called terminal is currently located, and transmits signaling data on the signaling channel to establish a data path between the calling terminal and the TMF in the called terminal and transmit single-call service data.
Optionally, the first TCF network element may record the TCF identifier where the called terminal is currently located, so that when the first TCF network element communicates with the called terminal again, the first TCF network element directly establishes a signaling channel with the recorded TCF identifier where the called terminal is currently located, so as to perform subsequent data transmission.
As an optional embodiment, if the called terminal is not under the control of the first TCF network element, before step 207, the method further includes: inquiring whether the TCF network element of the core network where the called terminal is located is recorded in the first TCF network element; if yes, establishing a communication channel between the first TCF network element and a TCF network element of a core network where the called terminal is located; and if not, executing the step of forwarding the single-call service request to a third TCF network element of the core network of the home domain of the called terminal.
Specifically, the first TCF network element records the TCF identifier where the called terminal is currently located, when the calling terminal calls the called terminal, the first TCF network element directly queries whether the TCF identifier where the called terminal is currently located is recorded in the first TCF network element, if so, it is indicated that the calling terminal is not calling for the first time, and at this time, a signaling channel can be directly established with the first TCF network element according to the recorded TCF identifier where the called terminal is currently located; if the inquiry is not successful, it indicates that the called terminal may call for the first time, and at this time, the first TCF network element where the calling terminal is located may directly send the single call service request to the TCF of the core network in the home domain of the called terminal, so as to obtain the TCF where the called terminal is currently located from the TCF of the core network in the home domain of the called terminal.
Further, for the situation that the called terminal has moved to another network, at this time, the TCF record of the calling terminal may be the original TCF identifier of the called terminal, at this time, if the calling terminal fails to perform the trunking service according to the recorded original TCF identifier, at this time, the original TCF may return failure information to notify the first TCF network element that the called terminal has changed networks, at this time, the first TCF network element initiates a call request to the TCF network element identifier of the core network of the home domain of the called terminal, so as to obtain the TCF where the called terminal currently locates from the TCF of the core network of the home domain of the called terminal.
On the basis of the embodiment, a single call service request initiated by a receiving terminal is carried with a called terminal number; determining whether the called terminal belongs to the first TCF network element control according to the called terminal number; if so, the first TCF network element processes the single call service according to the subscription information of the terminal; if not, forwarding the single-call service request to a third TCF network element of the core network of the home domain of the called terminal, wherein the third TCF network element returns the TCF network element of the core network where the called terminal is located to the first TCF network element; a communication channel is established between the first TCF network element and the TCF network element of the core network where the called terminal is located, so that the single call service is processed on the communication channel according to subscription information; that is, in this embodiment, the cluster control function TCF network element of the visited place is used to control and process the single call service, which avoids the need to return roaming data to the home place in the prior art, and improves the cluster service effect.
With reference to the foregoing implementation manners, fig. 7 is an interaction schematic diagram of a service processing method when a terminal roams in a broadband trunking system provided by the present invention, and as shown in fig. 7, when a trunking service is a group call service, the service processing method includes:
step 301, when the terminal roams to the core network of the visited domain, the first TCF network element initiates a registration request to the second TCF network element of the core network of the home domain of the terminal.
Step 302, responding to the registration request, determining the roaming mode of the terminal.
Step 303, when it is determined that the terminal adopts the local transmission and guidance roaming mode, the second TCF network element sends the subscription information of the terminal to the first TCF network element.
Step 304, sending the first TCF network element identifier of the core network of the visited domain to which the terminal roams to the group control device of the group to which the terminal belongs.
And 305, receiving a group call service request initiated by the terminal.
Step 306, forwarding the group call service request to the group control device.
Step 307, the group control device establishes a group call downlink channel according to the TCF network element where the other terminal is located, which is recorded in the group control device, to process the group call service.
And the other terminals and the terminal belong to the same group.
Step 301, step 302 and step 303 in this embodiment are similar to the implementation manners of step 101, step 102 and step 103 in the foregoing embodiment, respectively, and are not described herein again.
Different from the foregoing embodiments, this embodiment defines a specific implementation manner of a group call service, and in this embodiment, a first TCF network element identifier of a visited domain core network to which a terminal roams is sent to a group control device of a group to which the terminal belongs; the first TCF network element receives a group call service request initiated by a terminal, and forwards the group call service request to the group control equipment, so that the group control equipment establishes a group call downlink channel to process the group call service according to TCF network elements where other terminals recorded in the group control equipment are located, wherein the other terminals and the terminal belong to the same group.
Specifically, after the terminal completes registration in the core network of the visited domain, the first TCF network element user where the terminal is located informs the group control device G-TCF of a registration state report of the terminal, that is, the G-TCF records the TCF where each terminal belonging to the group is currently located; when a terminal initiates a group calling service request to a first TCF network element, the first TCF network element forwards the group calling service request to a group control device G-TCF; and when the G-TCF is activated, sending downlink group data according to the TCF where each terminal is currently located.
In addition, it should be noted that the processes of deregistering, ending the service, and the like of the terminal in the core network of the visited domain are controlled and processed by the V-TCF of the core network of the visited domain, and are not described herein again.
On the basis of the foregoing embodiment, the first TCF network element identifier of the core network of the visited domain, to which the terminal roams, is sent to the group control device of the group to which the terminal belongs; the method comprises the steps that a first TCF network element receives a group call service request initiated by a terminal and forwards the group call service request to group control equipment, so that the group control equipment establishes a group call downlink channel to process the group call service according to TCF network elements where other terminals recorded in the group control equipment are located, wherein the other terminals and the terminal belong to the same group; the embodiment of the invention adopts the cluster control function TCF network element of the visited place to control and process the group call service, thereby avoiding the need of returning roaming data to the home place in the prior art and improving the cluster service effect.
On the other hand, an example of the present invention provides a network element device with a trunking control function, fig. 8 is a schematic structural diagram of the network element device with the trunking control function provided in the present invention, and it should be noted that the network element device with the trunking control function is arranged in a core network in a visited domain, as shown in fig. 8, the network element device with the trunking control function includes:
a first sending module 10, configured to initiate a registration request to a second TCF network element of a core network of a home domain of a terminal when the terminal roams to a core network of a visited domain, where the registration request is used for the second TCF network element to return subscription information of the terminal to a first TCF network element when the second TCF network element determines that the terminal adopts a local guided roaming manner; a first receiving module 20, configured to receive subscription information of the terminal; the first response module 30 is configured to respond to a trunking service request initiated by a terminal, and process a trunking service according to subscription information of the terminal.
In other optional embodiments, the first sending module 10 is further configured to: and sending the first TCF network element identifier of the core network of the visited domain to which the terminal roams to the group control equipment of the group to which the terminal belongs.
In other optional embodiments, when the trunking service is a single call service, the first response module 30 is specifically configured to: receiving a single-call service request initiated by a terminal, wherein the single-call service request carries a called terminal number; determining whether the called terminal belongs to the first TCF network element control according to the called terminal number; and if so, the first TCF network element processes the single call service according to the subscription information of the terminal.
In other optional embodiments, the first response module 30 is further specifically configured to: if the called terminal does not belong to the control of the first TCF network element, forwarding the single call service request to a third TCF network element of the core network of the home domain of the called terminal, wherein the third TCF network element returns the TCF network element of the core network of the called terminal to the first TCF network element; and a communication channel is established between the first TCF network element and the TCF network element of the core network where the called terminal is located, so that the single-call service is processed on the communication channel according to subscription information.
In other optional embodiments, if the called terminal is not under the control of the first TCF network element, before forwarding the single-call service request to a third TCF network element of the core network of the home domain of the called terminal, the method further includes: inquiring whether the TCF network element of the core network where the called terminal is located is recorded in the first TCF network element; if yes, establishing a communication channel between the first TCF network element and a TCF network element of a core network where the called terminal is located; if not, executing the step of forwarding the single call service request to a third TCF network element of the core network of the home domain of the called terminal.
In other optional embodiments, when the trunking service is a group call service, the first response module 30 is specifically configured to: receiving a group call service request initiated by a terminal, and forwarding the group call service request to the group control equipment, so that the group control equipment establishes a group call downlink channel to process the group call service according to TCF network elements where other terminals recorded in the group control equipment are located, wherein the other terminals and the terminal belong to the same group.
In other optional embodiments, the first receiving module 20 is further configured to: and when the subscription information of the terminal is changed, receiving the changed subscription information sent by the second TCF network element.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process and corresponding beneficial effects of the cluster control function network element device described above may refer to the corresponding process in the foregoing method example, and are not described herein again.
In another aspect, an example of the present invention provides a network element device with a trunking control function, fig. 9 is a schematic structural diagram of another network element device with a trunking control function provided in the present invention, and it should be noted that the network element device with a trunking control function is configured in a core network in a home domain, as shown in fig. 9, the network element device with a trunking control function includes:
a second receiving module 40, configured to receive, when the terminal roams to the visited domain core network, a registration request sent by a first TCF network element of the visited domain core network; a second response module 50, configured to determine a roaming manner of the terminal in response to the registration request; a second sending module 60, configured to send, when it is determined that the terminal adopts the local transmission and guidance roaming mode, subscription information of the terminal to the first TCF network element, where the subscription information is used to instruct the first TCF network element to process the trunking service according to the subscription information of the terminal.
In other optional embodiments, the second response module 50 is specifically configured to: judging whether the configuration parameters of the local transmission and guidance exist in the subscription information of the terminal, if so, determining that the terminal adopts a roaming mode of the local transmission and guidance; or judging whether the number of the terminal belongs to a preset number, if so, determining that the terminal adopts a local transmission and guidance roaming mode, wherein the terminal corresponding to the preset number adopts the local transmission and guidance roaming mode.
In other optional embodiments, the second response module 50 is further configured to: and recording the first TCF network element identification of the core network of the visited domain to which the terminal roams.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process and corresponding beneficial effects of the cluster control function network element device described above may refer to the corresponding process in the foregoing method example, and are not described herein again.
It should be noted that, the structures of the visited domain core network and the home domain core network are the same, for a certain terminal, the home domain core network of the terminal may be the visited domain core network of another terminal, and the visited domain core network of the terminal may be the home domain core network of another terminal, that is, whether the core network is the visited domain or the home location is for the terminal. That is to say, the cluster control function network element device includes the first sending module 10, the first receiving module 20, the first responding module 30, and also includes the second receiving module 40, the second responding module 50, and the second sending module 60.
In another aspect, an example of the present invention provides a network element device with a trunking control function, where fig. 10 is a schematic diagram of a hardware structure of the network element device with the trunking control function provided in the present invention, it should be noted that the network element device with the trunking control function provided in the example of the present invention is arranged on a core network side in a visited domain, as shown in fig. 10, the network element device with the trunking control function provided in the present invention includes:
at least one processor 1001 and memory 1002.
In a specific implementation process, the at least one processor 1001 executes the computer execution instruction stored in the memory 1002, so that the at least one processor 1001 executes the service processing method in the terminal roaming in the broadband cluster system, where the processor 1001 and the memory 1002 are connected through the bus 1003.
For the specific implementation process of the processor 1001, reference may be made to the above method embodiments, which have similar implementation principles and technical effects, and details are not described herein again.
The example of the present invention further provides another trunking control function network element, whose hardware structure is similar to that in fig. 10, and is disposed at the core network side of the home domain, and its implementation principle and technical effect are similar to those in the foregoing method embodiment, and are not described herein again.
In the embodiment shown in fig. 10, it should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose processors, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. 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 invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
The memory may comprise high speed RAM memory, and may also include non-volatile storage NVM, such as at least one disk memory.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.
In another aspect, the present invention further provides a readable storage medium, which is disposed at a core network side of a visited domain, where the readable storage medium stores computer execution instructions, and when a processor executes the computer execution instructions, the method for processing a service when a terminal roams in the broadband trunking system is implemented.
The invention also provides another readable storage medium, which is arranged at the core network side of the home domain, wherein the readable storage medium stores computer execution instructions, and when a processor executes the computer execution instructions, the service processing method when the terminal roams in the broadband trunking system is realized.
The readable storage medium described above may be implemented by any type of volatile or non-volatile memory device or combination thereof, 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. Readable storage media can be any available media that can be accessed by a general purpose or special purpose computer.
An exemplary readable storage medium is coupled to the processor such the processor can read information from, and write information to, the readable storage medium. Of course, the readable storage medium may also be an integral part of the processor. The processor and the readable storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the readable storage medium may also reside as discrete components in the apparatus.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
On the other hand, the invention also provides a service implementation system when the terminal roams in the broadband trunking system, which comprises a first trunking control function TCF network element of a visited domain core network and a second TCF network element of a home domain core network; wherein the first cluster control function, TCF, network element is configured to perform the method according to any of the first aspects, and the second TCF network element is configured to perform the method according to any of the second aspects.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process and corresponding beneficial effects of the service implementation system when the terminal roams in the broadband trunking system described above may refer to the corresponding process in the foregoing method example, and are not described herein again.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (13)

1. A service processing method for terminal roaming in broadband cluster system is characterized in that the method is applied to a first cluster control function TCF network element of a core network of a visited domain, and the method comprises the following steps:
when a terminal roams to a core network of a visited domain, initiating a registration request to a second TCF network element of the core network of the home domain of the terminal, wherein the registration request is used for returning subscription information of the terminal to a first TCF network element when the second TCF network element determines that the terminal adopts a local transmission and guidance roaming mode;
receiving subscription information of the terminal;
and responding to a cluster service request initiated by the terminal, and processing the cluster service according to the subscription information of the terminal.
2. The method of claim 1, further comprising:
and sending the first TCF network element identifier of the core network of the visited domain to which the terminal roams to the group control equipment of the group to which the terminal belongs.
3. The method according to claim 1 or 2, wherein when the trunking service is a single call service, the processing the trunking service according to the subscription information of the terminal in response to the trunking service request initiated by the terminal comprises:
receiving a single-call service request initiated by a terminal, wherein the single-call service request carries a called terminal number;
determining whether the called terminal belongs to the first TCF network element control according to the called terminal number;
and if so, the first TCF network element processes the single call service according to the subscription information of the terminal.
4. The method of claim 3, further comprising:
if the called terminal does not belong to the control of the first TCF network element, forwarding the single call service request to a third TCF network element of the core network of the home domain of the called terminal, wherein the third TCF network element returns the TCF network element of the core network of the called terminal to the first TCF network element;
and a communication channel is established between the first TCF network element and the TCF network element of the core network where the called terminal is located, so that the single-call service is processed on the communication channel according to subscription information.
5. The method of claim 4, wherein if the called terminal is not under the control of the first TCF network element, before forwarding the single-call service request to a third TCF network element of a core network of a home domain of the called terminal, the method further comprises:
inquiring whether the TCF network element of the core network where the called terminal is located is recorded in the first TCF network element;
if yes, establishing a communication channel between the first TCF network element and a TCF network element of a core network where the called terminal is located;
and if not, executing the step of forwarding the single-call service request to a third TCF network element of the core network of the home domain of the called terminal.
6. The method of claim 2, wherein when the trunking service is a group call service, the processing the trunking service according to the subscription information of the terminal in response to a trunking service request initiated by a terminal comprises:
receiving a group call service request initiated by a terminal, and forwarding the group call service request to the group control device, so that the group control device establishes a group call downlink channel to process the group call service according to the TCF network elements where other terminals are recorded in the group control device, wherein the other terminals and the terminal belong to the same group.
7. The method according to claim 1 or 2, characterized in that the method further comprises:
and when the subscription information of the terminal is changed, receiving the changed subscription information sent by the second TCF network element.
8. A service processing method for terminal roaming in broadband cluster system is characterized in that the method is applied to a second cluster control function TCF network element of a core network of a home domain, and the method comprises the following steps:
when the terminal roams to a visited domain core network, receiving a registration request sent by a first TCF network element of the visited domain core network;
responding to the registration request, and determining a roaming mode of the terminal;
and when the terminal is determined to adopt a local transmission and guidance roaming mode, sending subscription information of the terminal to the first TCF network element, wherein the subscription information is used for indicating the first TCF network element to process the trunking service according to the subscription information of the terminal.
9. The method of claim 8, wherein the determining the roaming mode of the terminal comprises:
judging whether the configuration parameters of the local transmission and guidance exist in the subscription information of the terminal, if so, determining that the terminal adopts a roaming mode of the local transmission and guidance;
or judging whether the number of the terminal belongs to a preset number, if so, determining that the terminal adopts a local transmission and guidance roaming mode, wherein the terminal corresponding to the preset number adopts the local transmission and guidance roaming mode.
10. The method according to claim 8 or 9, characterized in that the method further comprises:
and recording the first TCF network element identification of the core network of the visited domain to which the terminal roams.
11. A cluster control function network element device, comprising:
the terminal comprises a first sending module and a second sending module, wherein the first sending module is used for initiating a registration request to a second TCF (trusted security function) network element of a core network of a home domain of a terminal when the terminal roams to a core network of a visited domain, and the registration request is used for returning subscription information of the terminal to a first TCF network element when the second TCF network element determines that the terminal adopts a local guidance roaming mode;
a first receiving module, configured to receive subscription information of the terminal;
and the first response module is used for responding to the cluster service request initiated by the terminal and processing the cluster service according to the subscription information of the terminal.
12. A cluster control function network element device, comprising:
the second receiving module is used for receiving a registration request sent by a first TCF network element of the visited domain core network when the terminal roams to the visited domain core network;
a second response module, configured to determine a roaming manner of the terminal in response to the registration request;
and the second sending module is used for sending the subscription information of the terminal to the first TCF network element when the terminal is determined to adopt the local transmission and guidance roaming mode, wherein the subscription information is used for indicating the first TCF network element to process the trunking service according to the subscription information of the terminal.
13. A service implementation system when a terminal roams in a broadband cluster system is characterized by comprising a first cluster control function TCF network element of a core network of a visited domain and a second TCF network element of a core network of a home domain;
wherein the first cluster control function, TCF, network element is configured to perform the method of any of claims 1-7, and the second TCF network element is configured to perform the method of any of claims 8-10.
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