CN103260144B - The method, apparatus and system of communicating by letter between a kind of terminal of heterogeneous networks - Google Patents
The method, apparatus and system of communicating by letter between a kind of terminal of heterogeneous networks Download PDFInfo
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Abstract
The invention discloses a kind of method of communicating by letter between terminal of heterogeneous networks, be applied to the intercommunication of the terminal under Distributed Services network and the soft Internet, comprising: A, obtain the call setup request message that calling terminal is initiated to the terminal called of other networks; B, number obtain the registration routing iinformation of the visited network of home network that terminal called registers in Distributed Services network or roaming according to the code of terminal called; C, described call setup request message is carried out to protocol adaptation and conversion; Carry out called service according to the registration routing iinformation of the visited network of the home network at the current place of described terminal called or roaming. Wherein, the application can solve in prior art and cannot carry out intercommunication problem between Distributed Services network and flexible exchanging network. In addition, the invention also discloses system, mobile services switching centre, service node and the user profile interworking unit of between a kind of terminal of heterogeneous networks, communicating by letter.
Description
Technical Field
The invention relates to a method for communication between terminals of different networks, in particular to a method and a system for communication between a distributed service network terminal and a soft switching network terminal, belonging to the communication network technology.
Background
The DSN is called a Distributed Service Network (DSN), and is a core network oriented to mobile internet services, having carrier-class operation capability, and located between services and a bearer network. The DSN is a new generation operable and manageable distributed core network system and a functional architecture which are provided by China mobile aiming at telecommunication services and mobile Internet services, is mainly used for solving some challenges of the current telecommunication networks and the Internet in service and operation, and absorbs the characteristics of the operable and manageable telecommunication networks and the characteristics of the Internet, such as rapidness, flexibility, low cost and expandability in service provision.
Among them, DSN adopts the internet-domain distributed (P2P) technology, and its architecture is shown in fig. 1: as shown in fig. 1, the DSN adopts a distributed architecture, and one of the important advantages of the distribution is a good self-organization, self-disaster recovery and dynamic load balancing capability. The distributed nodes of the DSN absorb the advantages of P2P technology and cloud computing, and form a logically distributed ultra-large capacity switch. The deployment can be based on a general server, each server can deploy one or more switching units (SNs), and nodes are organized and cooperated by adopting carrier-level DHT to realize distributed storage, backup and dynamic load balance. The main functions of the core Switching Node (SN) in a DSN network are distributed indexing, routing addressing, session control, traffic triggering, and data storage, etc.
DSN is in the same layer of telecommunication network with R4 soft switch and IMS in the aspect of telecommunication core network, and a brand-new core network architecture is designed by introducing P2P technology; in the aspect of the internet, the DSN is switched in from P2PVoIP and P2P streaming media, and public distributed network capability is extracted to provide service for internet services. DSN introduces P2P technology (such as DHT) to reform the core network, and the core network nodes (SN) are organized in a P2P mode to form P2 POveray, so that each node is allowed to participate in the organization, addressing and maintenance of overlay.
The DSN is used as a telecommunication-level core network following the IMS, and a step is further carried out towards the Internet direction in the aspect of service providing capacity, the step is mainly embodied on a distributed service capacity architecture, the lightweight VoIP service is supported through distributed session control overlay, and the concept of a content switching network is provided, the content switching network provides various content service applications for users, including live broadcast, on-demand, file downloading and the like, and the DSN is not only required to be adapted to various terminals such as a PC (personal computer), a mobile phone and the like, but also required to provide support for fixed mobile convergence. From the perspective of the operator, the distribution can save network resources and balance traffic.
Among them, the prior art R4 soft switching (SoftSwitching) is a packet-based network, which separates control from bearer and is the core of next generation network call and control, as shown in fig. 2. The basic meaning of the soft switch is to separate the call control function from the media gateway (transport layer), and to implement the basic call control function through software, thereby implementing the separation of call transmission and call control.
The basic meaning of soft switching is to separate the call control function from the media gateway (transport layer), and to implement the basic call control function by software, including call routing, management control, connection control (session establishment/teardown) and signaling interworking, thereby implementing the separation of call transmission and call control, and establishing a separate plane for control, switching and software programmable functions. The softswitch mainly provides functions of connection control, translation and routing, gateway management, call control, bandwidth management, signaling, security, and call detail recording. Meanwhile, the soft switch also encapsulates network resources and network capabilities and is connected with a service application layer through a standard open service interface, so that new services can be conveniently and quickly provided on the network.
The control layer architecture of the soft switch is shown in fig. 2:
as shown in fig. 2, the R4 soft switch architecture mainly includes a mobile services switching center (MSC), a Visitor Location Register (VLR), a Home Location Register (HLR), a media gateway and its control device (MGCF + MGW).
The MSC is the core of the network and completes the most basic switching function, the MSC provides a series of services such as bearing service, basic service and supplementary service for the user, and the MSC also supports the mobility functions such as position registration and automatic roaming. The VLR is a device that stores all relevant information about all subscribers entering its coverage area, and provides the registered mobile subscribers with the necessary conditions for establishing a call connection. The VLR is always co-located with the MSC in the physical entity, which avoids as much as possible the connection delay caused by frequent contacts between the MSC and the VLR.
The HLR is a central database of the system and stores all information related to the subscriber, including roaming authority, basic service, supplementary service, current location information, etc., so as to provide relevant data such as routing information required for establishing a call for the MSC. MGCF and MGW are used as the functional entity for interconnection between soft exchange network and other network to make adaptation and conversion of relevant call control protocol.
The R4 soft switch is used as the core network of the current telecommunication network to provide service for the existing 2G/3G users.
The DSN network is used as the evolution direction of the existing R4 soft switch telecommunication core network, and the replacement of the R4 soft switch network cannot be done at once, so the DSN and R4 soft switch networks can exist as the telecommunication core network at the same time within a period of time, but the users of the existing DSN network and the users located in the R4 soft switch network cannot realize intercommunication and cross-network roaming, thereby seriously influencing the user experience among terminals of each network.
Disclosure of Invention
Aiming at the defect that the distributed interactive network and the soft interactive network cannot be interconnected and intercommunicated in the prior art, the invention provides a communication method which can realize the purpose of interconnection and intercommunication of terminals in each network environment.
The invention provides a method for communication among terminals of different networks, which comprises the following steps:
A. acquiring a call establishment request message initiated by a calling terminal to a called terminal of other networks;
B. acquiring registration routing information of a home network or a roaming visited network registered in a distributed service network by a called terminal according to the code number of the called terminal;
C. carrying out protocol adaptation and conversion on the call establishment request message;
and performing the called service according to the registration routing information of the home network where the called terminal is currently located or the roaming visiting network.
Wherein, preferably, the calling terminal is a terminal belonging to a distributed service network; the called terminal belongs to the soft switching network, and before the step B, the method further comprises the following steps:
the home or roaming visited soft switching network where the called terminal is located reports the user information of the network where the called terminal is located to a home distributed service network;
the distributed service network records the user information and the routing information of the corresponding home network or roaming visited network.
Among them, preferably, in the step B, specifically including:
the home service node of the calling terminal inquires in a distributed service network;
and obtaining the registration routing information of the home network where the called terminal is currently located or the roaming visiting network according to whether the code number of the called terminal is registered in the distributed service network.
Preferably, the calling terminal is a soft switch network terminal, the called terminal is a distributed network terminal, and before step B, the method further includes:
the called terminal roams to a soft switching network and provides network service by the soft switching network, wherein the visiting network acquires the current user position information of the called terminal;
the visiting network reports the current user information of the terminal to the distributed service network, and the distributed service network records the registration routing information of the visiting network of the called terminal.
Among them, preferably, in the step B, specifically including:
the home service node of the calling terminal inquires in the distributed service network according to the code number of the called terminal;
acquiring the registration routing information registered in the distributed service network by the visited soft switching network where the home or current roaming of the called terminal is positioned.
Among them, preferably, in step C, further comprising:
the call establishment request is sent to the home service node of the called terminal according to the registration routing information of the home network of the called terminal;
and the home service node forwards the call establishment request to a visited soft switch network in which the called terminal is currently roaming according to the roaming registration routing information of the user, and the visited soft switch network provides called service.
After the technical scheme is adopted, the technical defects that the existing soft switching network and the existing distributed service network coexist, the 2G/3G terminal under the distributed service network and the soft switching network cannot be intercommunicated and cross-network roaming are overcome, in addition, in the application, the distributed service network terminal can roam to the soft switching network and is provided with service by the visited soft switching network after roaming, the soft switching network still provides service after the 2G/3G terminal of the soft switching network roams to the distributed service network, and the existing distributed service network and the soft switching network are slightly modified, so that the technical effect of good interconnection and intercommunication is achieved.
In addition, the invention also discloses a soft switching network mobile switching center, which comprises:
a receiving unit, configured to obtain a call establishment request message initiated to a called terminal;
the judging unit is used for acquiring the terminal of the called terminal belonging to the distributed service network according to the code number of the called terminal;
the query unit is used for establishing connection with a distributed service network and acquiring the registration routing information of the called terminal in a home network or a current roaming visited network in the distributed service network;
a sending unit, configured to send the call establishment request including the registration routing information to a media gateway control function network element, where the media gateway control function network element performs a subsequent call.
Preferably, the query unit specifically includes:
the inquiry subunit is used for initiating an inquiry request to the user information intercommunication device of the distributed service network according to the code number of the called terminal;
and the receiving subunit is used for receiving the registration routing information of the home network of the called terminal or the current roaming visited network, which is acquired by the user information intercommunication device in the distributed service network.
In addition, the invention also discloses a service node in the distributed service network, which comprises:
a receiving unit, configured to acquire a call establishment request message initiated by a calling terminal to a called terminal;
the judging unit is used for acquiring the terminal of the called terminal belonging to the soft switching network according to the code number of the called terminal;
the inquiry unit is used for inquiring the distributed service network according to the code number of the called terminal and acquiring the registration routing information of the home network or the current roaming visited network registered in the distributed service network by the called terminal;
a sending unit, configured to send the call establishment request including the registration routing information to a media gateway control function network element, where the media gateway control function network element performs a subsequent call.
In addition, the invention also discloses a user information intercommunication device, comprising:
a receiving unit, configured to receive a registration routing information query request for a distributed service network terminal, where the registration routing information query request is initiated by a mobile switching center of a soft switch network;
the access unit is used for accessing the distributed service network and acquiring registration routing information of a home service node of the called terminal returned by the distributed service network terminal;
and the sending unit is used for notifying the registration routing information of the home service node of the called terminal to the soft switching network mobile switching center.
Among them, preferably, still include:
the receiving unit is also used for receiving the user position information in the network synchronized in the HLR in the soft switching network;
the access unit is further configured to access to a distributed service network, and transmit the user location information and the network routing information to the distributed service network.
After the scheme is adopted, the user information intercommunication device realizes the intercommunication and synchronization of the terminal position information in the distributed service network and the soft switching network, wherein when the distributed network terminal roams to the soft switching network, the distributed network terminal can acquire the roaming data of the user in time, and further the roaming called service of the soft switching network terminal is realized.
In addition, the invention also discloses a media gateway control function network element, which comprises:
a receiving unit, configured to acquire a call establishment request message including registration routing information of a home network of a called terminal or a currently roaming visited network;
a protocol conversion unit for carrying out protocol adaptation and conversion on the call establishment request message;
and the routing unit is used for routing the call to a home network of the called terminal or a current roaming visited network based on the registration routing information.
In addition, the invention also discloses a system for communication among terminals of different networks, which comprises a distributed service network and a soft switching network, wherein the distributed service network comprises the user information intercommunication device and the service node;
the soft switching network comprises the soft switching network mobile switching control center and a media gateway control function network element.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The present invention will be described in detail below with reference to the accompanying drawings so that the above advantages of the present invention will be more apparent.
FIG. 1 is a schematic diagram of a system architecture of a distributed services network in the prior art;
fig. 2 is a schematic diagram of a prior art soft switch network;
FIG. 3 is a flow chart illustrating a method of communication between terminals of different networks according to the present invention;
fig. 4 is a schematic diagram of a calling flow of a terminal of a soft switch network according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a called flow of a distributed service network terminal according to an embodiment of the present invention;
figure 6 is a schematic diagram of a called flow of a distributed service network terminal roaming into a soft-switched network, in accordance with an embodiment of the present invention;
fig. 7 is a schematic diagram of registration of a distributed network terminal according to an embodiment of the present invention;
fig. 8 is a diagram illustrating registration of a roamed distributed network terminal according to an embodiment of the present invention;
fig. 9 is a schematic diagram of the registration of a terminal of a soft switch network according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a system for communication between terminals of different networks of the present invention;
fig. 11 is a schematic diagram of the architecture of a mobile switching center of a soft switch network in the system of the present invention;
FIG. 12 is a schematic diagram of a service node of a distributed services network in the system of the present invention;
FIG. 13 is a schematic structural diagram of a user information interworking apparatus in the system of the present invention;
fig. 14 is a schematic structural diagram of a media gateway control function network element in a soft switch network in the system of the present invention.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Wherein,
the first embodiment of the system:
FIG. 10 is a schematic diagram of a system for communication between terminals of different networks of the present invention;
as shown in fig. 10, in this embodiment, the communication system includes: soft switching networks and distributed service networks.
Wherein the distributed services network comprises: m-AGCF, service node SN and user information intercommunication device HLR-Client; the service nodes form a core network of the distributed service network, the network terminal is accessed to a corresponding home service node in the distributed service network by an m-AGCF network element, wherein the m-AGCF mainly completes mapping and conversion from an L3 application layer instruction (MM/CC/SS/SMS/USSD) and an A/Iu port wireless management signaling to SIP, and the m-AGCF can read a routing table of the distributed DHT node and sense network dynamic adjustment, and the above functions of the network element are well known in the prior art and are not described in detail herein.
The user information intercommunication device HLR can acquire user data transmitted by the HLR in the soft switching network, and can communicate with a service node in the distributed service network and a mobile switching center MSC in the soft switching network.
For the distributed service network, the HLR-Client is similar to an access terminal of the distributed service network; for the soft switching network, the mobile switching center can inquire and route the user data in the distributed service network to the nodes in the soft switching network through the user information intercommunication device, thereby realizing the user information intercommunication between the distributed service network and the soft switching network.
The soft switching network comprises HLR, GMSC, MSC + VLR network elements, wherein the network terminal is served by the MSC for calling, and the soft switching network further comprises a media gateway control function network element MGCF (media gateway control function) for interworking with other networks, and adapting and converting a related call control protocol.
The above network elements are described in detail with reference to the accompanying drawings, wherein fig. 11 is a schematic structural diagram of a mobile switching center of a soft switch network in the system of the present invention;
as shown in fig. 11, the soft switch network mobile switching center includes:
a receiving unit, configured to obtain a call establishment request message initiated to a called terminal;
the judging unit is used for acquiring the terminal of the called terminal belonging to the distributed service network according to the code number of the called terminal;
the query unit is used for establishing connection with a distributed service network and acquiring the registration routing information of the called terminal in a home network or a current roaming visited network in the distributed service network;
a sending unit, configured to send the call establishment request including the registration routing information to a media gateway control function network element, where the media gateway control function network element performs a subsequent call.
Preferably, the query unit specifically includes:
the inquiry subunit is used for initiating an inquiry request to the user information intercommunication device of the distributed service network according to the code number of the called terminal;
and the receiving subunit is used for receiving the registration routing information of the home network of the called terminal or the current roaming visited network, which is acquired by the user information intercommunication device in the distributed service network.
FIG. 12 is a schematic diagram of a service node of a distributed service network in the system of the present invention; as shown in fig. 12, the service node in the distributed service network includes:
a receiving unit, configured to acquire a call establishment request message initiated by a calling terminal to a called terminal;
the judging unit is used for acquiring the terminal of the called terminal belonging to the soft switching network according to the code number of the called terminal;
the inquiry unit is used for inquiring the distributed service network according to the code number of the called terminal and acquiring the registration routing information of the home network or the current roaming visited network registered in the distributed service network by the called terminal;
a sending unit, configured to send the call establishment request including the registration routing information to a media gateway control function network element, where the media gateway control function network element performs a subsequent call.
Fig. 13 is a schematic structural diagram of a user information interworking device in the system of the present invention;
as shown in fig. 13, the HLR _ Client as the subscriber information interworking device includes:
a receiving unit, configured to receive a registration routing information query request for a distributed service network terminal, where the registration routing information query request is initiated by a mobile switching center of a soft switch network;
the access unit is used for accessing the distributed service network and acquiring registration routing information of a home service node of the called terminal returned by the distributed service network terminal;
and the sending unit is used for notifying the registration routing information of the home service node of the called terminal to the soft switching network mobile switching center.
Among them, preferably, still include:
the receiving unit is also used for receiving the user position information in the network synchronized in the HLR in the soft switching network;
the access unit is further configured to access to a distributed service network, and transmit the user location information and the network routing information to the distributed service network.
After the scheme is adopted, the user information intercommunication device realizes the intercommunication and synchronization of the terminal position information in the distributed service network and the soft switching network, wherein when the distributed network terminal roams to the soft switching network, the distributed network terminal can acquire the roaming data of the user in time, and further the roaming called service of the soft switching network terminal is realized.
Fig. 14 is a schematic structural diagram of a media gateway control function network element in a soft switch network in the system of the present invention;
as shown in fig. 14, the media gateway control function network element MGCF includes:
a receiving unit, configured to acquire a call establishment request message including registration routing information of a home network of a called terminal or a currently roaming visited network;
a protocol conversion unit for carrying out protocol adaptation and conversion on the call establishment request message;
and the routing unit is used for routing the call to a home network of the called terminal or a current roaming visited network based on the registration routing information.
The invention adopts the technical scheme, can solve the technical defect that the existing soft switching network and the existing distributed service network can not be intercommunicated and cross-network roaming under the distributed service network and the soft switching network under the condition of coexistence, and in the application, the distributed service network terminal can roam to the soft switching network and be served by the visited soft switching network after roaming, and the 2G/3G terminal of the soft switching network still is served by the soft switching network after roaming to the distributed service network, so that the existing distributed service network and the soft switching network are slightly modified, thereby having good technical effect of interconnection and intercommunication.
Method embodiment one：
The communication method of the present invention will be described with reference to the accompanying drawings and specific embodiments.
Fig. 3 is a schematic flow chart of a method for communication between different network terminals according to the present invention; as shown in fig. 3, the method mainly comprises the following steps:
s101: acquiring a call establishment request message initiated by a calling terminal to a called terminal of other networks;
s102: acquiring registration routing information of a home network or a roaming visited network registered in a distributed service network by a called terminal according to the code number of the called terminal;
before this step, the terminal of each network is also required to report the registration routing information of the home network where the network terminal is currently located to one of the networks; or, when the network terminal is in a roaming state, the called terminal registers routing information of the visited network which is roaming currently.
S103: carrying out protocol adaptation and conversion on the call establishment request message;
s104: and performing subsequent called services of the called terminal according to the registration routing information of the home network of the called terminal or the current roaming visited network.
Wherein, in a preferred embodiment, the calling terminal is a distributed service network terminal; the called terminal is a soft switch network terminal, and in S102, the method specifically includes:
the home service node of the calling terminal inquires in a distributed service network;
and obtaining the registration routing information of the home network where the called terminal is currently located or the roaming visiting network according to whether the code number of the called terminal is registered in the distributed service network.
Before step S102, the method further includes the steps of:
the home or roaming visited soft switching network where the called terminal is located reports the user information of the network where the called terminal is located to a home distributed service network;
the distributed service network records the user information and the routing information of the corresponding home network or roaming visited network.
In another embodiment, the calling terminal is a soft switch network terminal, the called terminal is a distributed network terminal, and step S102 specifically includes:
the home service node of the calling terminal inquires in the distributed service network according to the code number of the called terminal;
acquiring the registration routing information registered in the distributed service network by the visited soft switching network where the home or current roaming of the called terminal is positioned.
Before step S102, the method further includes:
the called terminal roams to the soft switch network, and the HLR of the visiting domain acquires the user position information of the called terminal in the visiting domain;
the called terminal roams to a soft switching network and provides network service by the soft switching network, wherein the visiting network acquires the current user position information of the called terminal;
the visiting network reports the current user information of the terminal to the distributed service network, and the distributed service network records the registration routing information of the visiting network of the called terminal.
In step S103, the call setup request is sent to the home service node of the called terminal according to the registration routing information of the home network of the called terminal;
and the home service node forwards the call establishment request to a visited soft switch network in which the called terminal is currently roaming according to the roaming registration routing information of the user, and the visited soft switch network provides called service.
After the scheme is adopted, the technical scheme can overcome the technical defect that the 2G/3G terminals under the distributed service network and the soft switching network cannot be intercommunicated and cross-network roaming under the condition that the existing soft switching network and the distributed service network coexist.
The second method embodiment:
the above method of the present invention is described in detail with reference to specific examples below; fig. 4 is a schematic diagram of a calling flow of a terminal of a soft switch network according to an embodiment of the present invention;
wherein the calling terminal is a distributed service network terminal; the called terminal is a soft switch network terminal.
As shown in fig. 4, the method mainly comprises the steps of:
step 41: a 2G/3G terminal in the distributed service network initiates a call establishment request (SET-UP message) to the m-AGCF;
step 42: the m-AGCF converts the call establishment request message into an INVITE message of the SIP, and sends the INVITE message to a DSN core network;
step 43: the INVITE message is routed to a home service node sn (servingnode) responsible for the user by a distributed server network through the existing P2P algorithm, and the INVITE message is acquired by the service node; the service node acquires that the called terminal belongs to the soft switch network according to the code number of the called terminal, and further comprises:
querying in a service node in a distributed service network;
if the called terminal has registered, extracting the registration routing information of the home domain network or the visit domain network, and forwarding an INVITE message containing the registration routing information to the MGCF, otherwise, returning to fail;
step 44: the MGCF performs protocol conversion and adaptation, converts the INVITE message into a call setup request message (SET-UP message), extracts the registration routing information, and forwards the registration routing information to a gateway GMSC of the soft-switched network to perform a subsequent called call, for example, in this embodiment, the subsequent called includes the following main steps:
step 45: gateway office GMSC sends query request (MAP request) to HLR in soft exchange network, and queries MSC route information of called user;
step 46: HLR sends the enquiry request (MAP request) to the domain VLR where the called user is located, which is recorded in the database, and requests VLR to distribute the routing number information reaching the domain MSC;
step 47: VLR sends the routing number of the called user MSC to HLR (MAPACK message);
and 48: the HLR returns the routing number of the called user MSC to the gateway office GMSC (MAPACK message);
step 49: the GMSC forwards a call establishment request (SET-UP message) to the called MSC;
step 410: the MSC of the called subscriber transmits a call setup request message (SET-UP message) to the called terminal. The steps 45-410 are called processes common in the prior art, and will not be described in detail here.
After the technical scheme is adopted, the routing information of the soft switching network can be stored in the distributed service network, and the technical effect that the terminal of the distributed service network calls the terminal in the soft switching network is further achieved.
The third method embodiment:
fig. 5 is a schematic diagram of a called flow of a distributed service network terminal according to an embodiment of the present invention; in this embodiment, the calling terminal is a soft switch network terminal; the called terminal is a distributed service network terminal.
Wherein the called terminal does not roam, the method comprising the steps of:
step 51, the 2G/3G terminal (calling terminal) of the soft switch network initiates a call request (SET-UP message) to a mobile service switching center (MSC) (calling MSC);
step 52, the mobile service switching center MSC determines that the called terminal belongs to the distributed service network by detecting the code number of the called 2G/3G terminal; inquiring a distributed service network to acquire routing information (MAP request) of the network of the called terminal;
in the embodiment, a user information intercommunication device HLR-Client in a distributed service network is used for accessing into the distributed service network, and the routing information of a home service node of a called terminal is obtained;
step 53: according to the query result, the distributed service network returns to the mobile service switching center to acquire the routing information of the home service node, for example, in the embodiment, the HLR-Client returns an IMRN number to the calling mobile service switching center MSC;
step 54: the mobile services switching center MSC sends a call setup request message (SET-UP message) containing routing information of the home service node to the MGCF through the IMRN number, and the MGCF performs a subsequent called service, for example, including the following steps:
step 55: the MGCF converts the call establishment request message into an INVITE message of the SIP and sends the INVITE message to the distributed service network;
step 56: the INVITE message of the distributed service network is routed to a service node SN (servingnode) responsible for the user through the existing P2P algorithm, and the SN triggers related called services and then forwards the INVITE message to an m-AGCF connected with a called terminal;
and 57: and the m-AGCF converts the INVITE message into a call establishment request (SET-UP request) and then sends the call establishment request to the called terminal. The steps 55-57 are called procedures of a distributed service network terminal, which are common in the prior art and will not be described in detail herein.
By the scheme, the problem of session establishment of the distributed service network terminal as the called terminal is solved, and the technical effect is good.
In a further embodiment, the distributed service network terminal is in a roaming state, in which case the distributed service network terminal is provided with network services by a soft switch service network.
Fig. 6 is a schematic diagram illustrating a called flow of a distributed service network terminal roaming to a soft switch network according to an embodiment of the present invention;
as shown in fig. 6, the flow of the call is described as follows:
step 61: a 2G/3G terminal of the soft switching network initiates a call request (SET-UP message) to the MSC;
step 62: the calling MSC determines that the called terminal belongs to the DSN network by detecting the code number of the 2G/3G terminal, and initiates a query request (MAP request) to HLR-Client to acquire called SN information;
and step 63: the HLR-Client returns an IMRN number to the calling MSC;
step 64: MSC sends call setup request message (SET-UP message) to MGCF through IMRN number;
step 65: MGCF converts the call establishment request message into an INVITE message of SIP, and sends the INVITE message to a distributed service network;
and step 66: unlike the above embodiment, the INVITE message is routed to the sn (servingnode) responsible for the user through the existing P2P algorithm, and these steps are included in the above steps, and the steps further include the following steps:
after the service node SN triggers related called services, the service nodes in all distributed service networks are traversed or information stored by the service nodes is acquired from the service nodes, the called terminal is located in a soft switching network at the moment and acquires the routing information of a roaming soft switching network in which the called terminal is located at the moment, an INVITE message containing the routing information of the roaming soft switching network is transmitted to the MGCF, and the MCF performs subsequent called services. The method specifically comprises the following steps:
step 67: the MSCF converts the INVITE message into a call establishment request and forwards the message to a called user visit domain VMSC according to the routing information;
step 68: and the access domain VMSC sends the call establishment request to the called terminal.
Based on the above embodiment, the present invention further solves the communication problem that the called terminal roams to the soft switch network, and after the technical solution is adopted, the present invention can solve the technical disadvantage that the existing soft switch network and the existing distributed service network coexist, and the 2G/3G terminal under the distributed service network and the soft switch network cannot perform interworking and cross-network roaming.
The method comprises the following steps:
for this reason, the following describes in detail a registration flow of various network terminals in the present application, where fig. 7 is a registration schematic diagram of a distributed network terminal according to an embodiment of the present invention; fig. 8 is a diagram illustrating registration of a roamed distributed network terminal according to an embodiment of the present invention; fig. 9 is a diagram illustrating registration of a terminal of a soft switch network according to an embodiment of the present invention.
As shown in fig. 7, a distributed network terminal registration process is as follows:
step 71: a 2G/3G terminal of the distributed service network initiates a position updating request message to the m-AGCF;
step 72: the m-AGCF converts the location update message into a REGISTER message of the SIP, and sends the REGISTER message to a DSN core network;
step 73: the REGISTER message is routed to a home Service Node (SN) (servingnode) which is responsible for the user through the existing P2P algorithm, and the SN initiates third party registration to an Application Server (AS) after verifying the user identity;
step 74: the application server returns a 200OK message;
step 75: the home service node SN returns a 200OK message to the m-AGCF to indicate that the location update (registration) is successful;
step 76.m-AGCF converts the SIP 200OK message into a location update success message and sends the location update success message to the called terminal, and by the method, the distributed service network obtains the user information of the network terminal and the routing information of the home network node.
Fig. 8 is a schematic diagram of registration of a distributed network terminal after roaming according to an embodiment of the present invention, and according to fig. 8, registration of a distributed network terminal roaming to a soft switch network is as follows:
step 81, the 2G/3G terminal of the distributed service network roams to a soft switching network and initiates a position updating request to a visiting domain VMSC;
step 82: the visited domain VMSC determines that the terminal belongs to the DSN network by detecting the code number of the 2G/3G terminal, and initiates a position updating request to the HLR-Client;
step 83: the HLR-Client converts the user updating request into a REGISTER message of the SIP and sends the REGISTER message to the DSN core network;
step 84, the REGISTER message is routed to the home SN (servingnode) responsible for the user through the P2P algorithm, the home service node SN records the information of the visiting domain of the roaming soft switching network where the user is located, and replies a confirmation message to the HLR-Client;
step 85.HLR-Client converts SIP 200OK message into location update success confirmation and sends to VMSC;
step 86. the VMSC sends a location update success message to the roamed terminal.
By the method, the distributed service network obtains the user information of the network terminal after roaming and the routing information of the node of the soft switching network after roaming.
Fig. 9 is a schematic diagram of registration of a terminal of a soft switch network according to an embodiment of the present invention. Here, the following description is given of a registration procedure of a 2G/3G terminal roaming to another soft-switched network, and specifically includes the following steps:
step 91: the soft switching network 2G/3G terminal initiates a position updating request to a visited domain VMSC of the soft switching network after roaming which currently provides network service;
and step 92: the visited domain VMSC initiates a position updating request to the HLR by detecting the code number of the 2G/3G terminal;
step 93: the visited domain HLR confirms the successful position updating and sends the position updating to the VMSC;
step 94: the VMSC sends the successful message of location update to the soft switching network terminal after roaming;
step 95: the HLR synchronizes data to the HLR-client;
step 96: the HLR-Client detects that the user carries out position updating, generates a REGISTER message of the SIP for the user and sends the REGISTER message to a DSN core network;
step 97. the REGISTER message is routed to the SN (servingnode) node in the DSN network through the P2P algorithm, the service node SN in the DSN core network records the information of the visited domain where the user is located, and replies an acknowledgement message (e.g. 200OK) to the HLR-Client.
By the method, the user position information of all the network terminals and the routing information of the current network are put into the distributed service network, and the distributed service network has good disaster tolerance, so that the method not only can provide communication between the terminals of the distributed service network and the terminals of the soft switching network, but also has a good technical effect of communication stability.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media capable of storing program codes, such as a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, terminal mobile phone software, or an optical disk.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A method of communication between terminals of different networks, comprising:
A. acquiring a call establishment request message initiated by a calling terminal to a called terminal of other networks;
B. acquiring registration routing information of a home network or a roaming visited network registered in a distributed service network by a called terminal according to the code number of the called terminal;
C. carrying out protocol adaptation and conversion on the call establishment request message;
performing a called service according to the registration routing information of the home network where the called terminal is currently located or the roaming visited network;
in the step B, the method specifically comprises the following steps:
the home service node of the calling terminal inquires in a distributed service network;
and obtaining the registration routing information of the home network where the called terminal is currently located or the roaming visiting network according to whether the code number of the called terminal is registered in the distributed service network.
2. Method of communication between terminals of different networks according to claim 1, characterized in that the calling terminal is a terminal belonging to a distributed service network; the called terminal belongs to the soft switching network, and before the step B, the method further comprises the following steps:
the home network where the called terminal is located or the roaming visited soft switching network reports the user information of the network where the called terminal is located to the home distributed service network;
the distributed service network records the user information and the routing information of the corresponding home network or roaming visited network.
3. The method according to claim 1, wherein the calling terminal is a soft switch network terminal, the called terminal is a distributed network terminal, and before step B, the method further comprises:
the called terminal roams to a soft switching network and provides network service by the soft switching network, wherein the visiting network acquires the current user position information of the called terminal;
the visiting network reports the current user information of the terminal to the distributed service network, and the distributed service network records the registration routing information of the visiting network of the called terminal.
4. The method according to claim 3, wherein the step B specifically includes:
the home service node of the calling terminal inquires in the distributed service network according to the code number of the called terminal;
and acquiring the registration routing information registered in the distributed service network by the home network of the called terminal or the current roaming visited soft switching network.
5. The method according to claim 4, wherein in step C, the method further comprises:
the call establishment request is sent to the home service node of the called terminal according to the registration routing information of the home network of the called terminal;
and the home service node forwards the call establishment request to a visited soft switch network in which the called terminal is currently roaming according to the roaming registration routing information of the user, and the visited soft switch network provides called service.
6. A soft switch network mobile switching center comprising:
a receiving unit, configured to obtain a call establishment request message initiated to a called terminal;
the judging unit is used for acquiring the terminal of the called terminal belonging to the distributed service network according to the code number of the called terminal;
the query unit is used for establishing connection with a distributed service network and acquiring the registration routing information of the called terminal in a home network or a current roaming visited network in the distributed service network;
a sending unit, configured to send the call establishment request including the registration routing information to a media gateway control function network element, where the media gateway control function network element performs a subsequent call.
7. The soft switch network mobile switching center according to claim 6, wherein the query unit specifically includes:
the inquiry subunit is used for initiating an inquiry request to the user information intercommunication device of the distributed service network according to the code number of the called terminal;
and the receiving subunit is used for receiving the registration routing information of the home network of the called terminal or the current roaming visited network, which is acquired by the user information intercommunication device in the distributed service network.
8. A service node in a distributed service network, comprising:
a receiving unit, configured to acquire a call establishment request message initiated by a calling terminal to a called terminal;
the judging unit is used for acquiring the terminal of the called terminal belonging to the soft switching network according to the code number of the called terminal;
the inquiry unit is used for inquiring the distributed service network according to the code number of the called terminal and acquiring the registration routing information of the home network or the current roaming visited network registered in the distributed service network by the called terminal;
a sending unit, configured to send the call establishment request including the registration routing information to a media gateway control function network element, where the media gateway control function network element performs a subsequent call.
9. A user information interworking apparatus, comprising:
a receiving unit, configured to receive a registration routing information query request for a distributed service network terminal, where the registration routing information query request is initiated by a mobile switching center of a soft switch network;
the access unit is used for accessing the distributed service network and acquiring registration routing information of a home service node of the called terminal returned by the distributed service network terminal;
and the sending unit is used for notifying the registration routing information of the home service node of the called terminal to the soft switching network mobile switching center.
10. The apparatus as claimed in claim 9, further comprising:
the receiving unit is also used for receiving the user position information in the network synchronized in the HLR in the soft switching network;
the access unit is further configured to access to a distributed service network, and transmit the user location information and the network routing information to the distributed service network.
11. A media gateway control function network element, comprising:
a receiving unit, configured to acquire a call establishment request message including registration routing information of a home network of a called terminal or a currently roaming visited network, where the registration routing information is obtained by querying a service node in a distributed service network in the distributed service network and registering and acquiring the registration routing information in the distributed service network according to whether a code number of the called terminal is in the distributed service network;
a protocol conversion unit for carrying out protocol adaptation and conversion on the call establishment request message;
and the routing unit is used for routing the call to a home network of the called terminal or a current roaming visited network based on the registration routing information.
12. A system for communication between terminals of different networks, comprising a distributed service network and a soft switch network, characterized in that,
the distributed service network comprises the user information interworking apparatus of any one of claims 9-10 and the service node of claim 8;
the soft switch network comprises a soft switch network mobile switching control center according to any one of claims 6 to 7 and a media gateway control function network element according to claim 11.
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| CN106941734B (en) * | 2016-01-05 | 2020-06-12 | 中国移动通信集团公司 | Communication method, device and system |
| CN109348175B (en) * | 2018-10-25 | 2019-05-17 | 北京邮电大学 | Communication means between a kind of monitoring system |
| CN110035295A (en) * | 2019-03-06 | 2019-07-19 | 深圳市麦谷科技有限公司 | Distributed video living transmission system |
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| CN1735268A (en) * | 2004-08-11 | 2006-02-15 | 华为技术有限公司 | Method for realizing mixed telephone number and communications network system |
| CN101729592A (en) * | 2008-10-29 | 2010-06-09 | 中国移动通信集团公司 | Distributed communication network and equipment and communication network separation method |
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| CN1735268A (en) * | 2004-08-11 | 2006-02-15 | 华为技术有限公司 | Method for realizing mixed telephone number and communications network system |
| CN101729592A (en) * | 2008-10-29 | 2010-06-09 | 中国移动通信集团公司 | Distributed communication network and equipment and communication network separation method |
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