CN1678117A - Method for resolving speech channel roundabout - Google Patents

Abstract

The invention discloses a method for solving the detour of the speech path, which includes: A. When the switching entity receives a call initiated by a terminal to access the special function switching entity, assign the call to an incoming trunk group circuit; The trunk circuit is used as a speech path, and the call carrying the circuit identification code assigned to the trunk circuit is sent to the special function switching entity through signaling; B. The special function switching entity receiving the call makes the call After performing the corresponding processing, the outgoing trunk circuit in the outgoing trunk group circuit corresponding to the circuit identification code assigned to the incoming trunk circuit is obtained according to the set corresponding relationship, and the processed call is sent to the The corresponding outgoing trunk circuit in the switching entity; C. After the switching entity receives the processed call sent from the special function switching entity, it continues to connect.

Description

A method to solve the detour

technical field

The present invention relates to a technology for a terminal to access a special function switching entity, in particular to a method for solving a roundabout conversation path when a terminal accesses a special function switching entity.

Background technique

At present, integrated operators may manage multiple communication networks at the same time, such as: public switched telephone (PSTN) network and code division multiple access (CDMA) network, etc., in order to improve the competitiveness of communication services and reduce construction costs, etc. , tends to enable multiple communication networks under its management to exchange communication information, such as: use the special function switching entity of the fixed intelligent network to provide intelligent services to the terminals in the CDMA network, thus the information interaction of the superimposed network appears.

When a terminal wants to access a special function switching entity across networks to obtain communication information, for example: a terminal in a CDMA network needs to access the service switching point (SSP) of the fixed intelligent network, and obtain the intelligence in the service control point of the fixed intelligent network through the SSP. When doing business, as shown in Figure 1, Figure 1 is a schematic diagram of the prior art terminal cross-network access special function switching entity to obtain communication information, wherein the special function switching entity of the fixed intelligent network has a signaling point, and the CDMA network The switching entity is configured with a trunk group circuit to the signaling point, and the trunk group circuit is used to establish the signaling route and voice path between the switching entity in the CDMA network, and the special function switching entity of the fixed intelligent network has the same The trunk group circuit that is the same as the trunk group circuit of the switching entity is used to continue the voice channel of the switching entity in the CDMA network through the transmission trunk.

As shown in Figure 2, Figure 2 is a flowchart corresponding to Figure 1, and its specific steps are:

Step 200, a terminal in the CDMA network initiates a call to acquire an intelligent service request;

Step 201, after receiving the call, the switching entity in charge of the terminal, i.e. the Mobile Services Switching Center (MSC), assigns a trunk circuit to the terminal from the trunk group circuit, that is, the special function of establishing a voice path route to the fixed intelligent network On the switching entity SSP, send the intelligent network service acquisition request initiated by the terminal to the SSP in the form of shared signaling, and connect the voice channel of the terminal to the corresponding trunk circuit of the SSP;

Step 202: The SSP that has received the request obtains the intelligent service information from the SCP of the fixed intelligent network according to the request, and establishes a call route from the corresponding trunk circuit of the SSP to another idle trunk circuit in the MSC trunk group circuit. On the relay circuit, connect the voice channel of the terminal back to the MSC and send the acquired intelligent service information to the MSC in the form of shared signaling;

Step 203, the MSC connects to other switching entities according to the intelligent service information, and continues the call.

In the above process, when a terminal in the CDMA network wants to obtain the intelligent services provided by the fixed intelligent network, it not only needs to transmit signaling, but also needs to establish a voice channel from the MSC of the CDMA network to the SSP of the fixed intelligent network and from the fixed intelligent network to the fixed intelligent network. The return call path from the SSP of the CDMA network to the MSC of the CDMA network is used to continuously connect the call path to the terminal that initiates the call. Therefore, there are two call paths between the CDMA network and the fixed intelligent network, and a roundabout phenomenon occurs. , resulting in a waste of trunk circuit resources, increasing the operator's investment and maintenance costs on the trunk circuit.

Similarly, in order to reduce costs, integrated operators set up the number of special function switching entities when establishing an intelligent network, which is one-tenth or even less than the number of switching entities, so that one special function switching entity can be governed by multiple switching entities The local network is shared. Therefore, when the terminal accesses the special function switching entity through the switching entity of the local network to which the terminal belongs, there will be a detour as shown in Figure 2 between the switching entity and the special function switching entity, resulting in This reduces the waste of trunk circuit resources and increases the operator's investment and maintenance costs for the trunk circuit.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method for solving the roundabout of the call path, which can reduce the trunk circuit resources occupied by the call path of the terminal, thereby reducing the operator's investment and investment in the trunk circuit. maintenance costs.

According to above-mentioned purpose, specific embodiment of the present invention is achieved like this:

A method for solving the circuitous speech path, setting the incoming trunk group circuit from the switching entity to the special function switching entity and the outgoing trunk group circuit from the special function switching entity to the switching entity, and setting the corresponding relationship between the two trunk group circuits. The switching entity crosses and self-loops two trunk group circuits having a corresponding relationship, and the method also includes:

A. When the switching entity receives a call initiated by the terminal to access the special function switching entity, it assigns the call to an incoming trunk circuit in the incoming trunk group circuit as a voice path, and carries the assigned incoming trunk The call of the circuit identification code of the circuit is sent by signaling to the special function switching entity;

B. After receiving the call, the special function switching entity performs corresponding processing on the call, and obtains the outgoing trunk in the outgoing trunk group circuit corresponding to the circuit identification code assigned to the incoming trunk circuit according to the set corresponding relationship The circuit sends the processed call to the corresponding outgoing trunk circuit in the switching entity through signaling;

C. After the switching entity receives the processed call sent from the special function switching entity, it continues to connect.

Setting a receiving signaling point and a sending signaling point in the special function switching entity;

The incoming trunk group circuit is a receiving signaling point set from the switching entity to the special function switching entity;

The outgoing trunk group circuit is set from the signaling point of the special function switching entity to the switching entity.

setting a signaling point in the special function switching entity;

The incoming trunk group circuit is the signaling point set from the switching entity to the special function switching entity;

The outgoing trunk group circuit is set from the signaling point of the special function switching entity to the switching entity.

The set number of incoming trunk circuits in incoming trunk group circuits is the same as the number of outgoing trunk circuits in outgoing trunk group circuits.

The corresponding relationship between the two trunk group circuits is to establish a corresponding relationship between the incoming trunk circuit in the incoming trunk group circuit and the outgoing trunk circuit in the outgoing trunk group circuit with the same circuit identification code;

Or establish a corresponding relationship between the incoming trunk circuits in the incoming trunk group circuits and the outgoing trunk circuits in the outgoing trunk group circuits with the same order.

The cross self-loop is that the sending end/receiving end of the incoming trunk circuit in the incoming trunk group circuit is connected with the receiving end/sending end of the outgoing trunk circuit having a corresponding relationship in the outgoing trunk group circuit.

The switching entity is a mobile switching center in the mobile network, or an entity that completes the switching function in the public telephone switching network, or an entity that completes the switching function in the fixed communication network.

The special function switching entity is an entity providing intelligent services for switching entities in a mobile communication network, or an entity providing charging services for switching entities in a mobile communication network, or an entity providing intelligent services for switching entities in a fixed communication network entity, or an entity that provides charging services for switching entities in the fixed communication network.

The signaling is common channel signaling.

The call to access the special function switching entity in step A is a call that requires a special function switching entity to trigger an intelligent service, or a call that requires a special function switching entity to trigger a charging service, or a call that requires a special function switching entity to trigger a communication service .

The corresponding processing of the call described in step B is triggering an intelligent service, or triggering a billing service, or triggering a communication service.

It can be seen from the above scheme that when the terminal accesses the special function switching entity through the switching entity in the present invention, it does not connect the voice channel initiated by the terminal to the special function switching entity through the switching entity, and then the special function switching entity connects the voice channel to the special function switching entity. The connection goes back to the switching entity, but two trunk circuits are set inside the switching entity for cross-self-looping, and the voice path initiated by the terminal is carried out on the switching entity for cross-self-looping, so that the method provided by the present invention reduces the number of terminal calls The relay circuit resource occupied by the road can reduce the investment and maintenance cost of the operator on the relay circuit.

Description of drawings

FIG. 1 is a schematic diagram of a terminal cross-network accessing a special function switching entity to obtain communication information in the prior art.

Fig. 2 is a flow chart of the prior art for a terminal to access a special function switching entity across networks to obtain communication information.

FIG. 3 is a schematic diagram of a terminal cross-network accessing a special function switching entity to obtain communication information according to the present invention.

FIG. 4 is a flow chart of the present invention for a terminal to access a special function switching entity across networks to obtain communication information.

Fig. 5 is a schematic diagram of an embodiment of a terminal in a mobile network accessing a fixed network SSP according to the present invention.

FIG. 6 is a schematic diagram of an embodiment of a terminal remotely accessing a pre-paid platform (Pre-paid Platform) in a mobile network according to the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail by citing the following embodiments and referring to the accompanying drawings.

The present invention pre-sets dual signaling points for the special function switching entity, and configures the switching entity with trunk group circuits respectively connected to the two signaling points. The two trunk group circuits have the same circuit identification code (CIC) range. The trunk circuits with the same CIC in the two trunk group circuits are cross self-looped at the switching entity. The cross self-loop is that the sending end/receiving end of a trunk circuit in one trunk group circuit is connected to the receiving end/sending end of a trunk circuit with the same CIC in another trunk group circuit.

When the terminal wants to access the special function switching entity across the network, as shown in Figure 3, Figure 3 is a schematic diagram of the terminal of the present invention accessing the special function switching entity across the network to obtain communication information: the signaling point set at the special function switching entity For signaling point A and signaling point B, configure trunk group circuit 1 to signaling point A and trunk group circuit 2 to signaling point B on the switching entity, and configure the configured trunk group circuit 1 and trunk The group circuit 2 crosses the self-loop.

The signaling point A and the signaling point B described in the present invention can also be the same signaling point, and the signaling point undertakes the function of sending and receiving common channel signaling.

The signaling point A described in the present invention can be called a receiving signaling point, the signaling point B can be called a sending signaling point, and the trunk group circuit 1 can be called an incoming trunk group circuit, the trunk group circuit 2 may be referred to as an outgoing trunk group circuit.

As shown in Figure 4, Figure 4 is a flowchart corresponding to Figure 3, and its specific steps are:

Step 400, the terminal initiates a call to the switching entity of the local network to access the special function switching entity;

Step 401, the switching entity that has received the request allocates a trunk circuit in the preset trunk group circuit 1 to the call, connects the voice path to the trunk circuit, and connects the call through common path signaling To the signaling point A of the special function switching entity, the call carries the CIC of the allocated trunk circuit;

Step 402: According to the call, the special function switching entity obtains the communication information required by the call from the network to which the special function switching entity belongs, performs corresponding processing, and allocates a trunk group circuit according to the carried CIC of incoming trunk group circuit 1 The trunk circuit with the same CIC in 2 is the outgoing trunk group voice channel, and the communication information carrying the CIC of the allocated trunk circuit 2 is sent from the signaling point B in the special function switching entity through the common channel signaling sent to the exchange entity;

Step 403: After receiving the call from the special function switching entity, the switching entity connects the voice circuit of the trunk group circuit 1 to the trunk group circuit 2, and continues the call according to the received communication information.

The switching entity routes the call to the special function switching entity through common channel signaling, and the destination signaling point is the signaling point A of the special function switching entity; after the special function switching entity performs corresponding processing, it returns the call to the switching entity and sends the service The source signaling point of the signaling is the signaling point B of the special function switching entity. Therefore, the call channel of this call is not connected to the special function switching entity through the switching entity, but is only looped inside the switching entity, and the switching entity treats the outgoing call to the special function switching entity and the incoming call from the special function switching entity as Two calls are processed, so that there is no need for a voice channel between the switching entity and the special function switching entity, and only the signaling link is needed to transmit the call, thereby reducing the resources occupied by the trunk circuit.

In the present invention, the CIC ranges of the two trunk group circuits set in the switching entity may also be different, that is, the CIC of trunk group circuit 1 and the CIC of trunk group circuit 2 are different, and only the CIC of trunk group circuit 1 needs to be set. The trunk circuit CIC is in one-to-one correspondence with the trunk circuit CIC in trunk group circuit 2 and the corresponding relationship is saved, so as to ensure that the switching entity correctly performs the corresponding circuit cross self-loop and special circuit of trunk group 1 and trunk group 2 The switching entity selects the correct CIC of the corresponding circuit of trunk group 2. Wherein, the common channel signaling may be SS7 Telephone User Part (TUP) or Integrated Services Digital Network (ISDN) User Part (ISUP).

Similarly, if the switching entity and the special function switching entity are in an intelligent network, and the intelligent network governs a plurality of local networks, and there is no special function switching entity in the local network under the jurisdiction of the switching entity, then the local network of the present invention also Corresponding services can be improved by accessing the special function switching entity through the switching entity of the local network according to the method described in FIG. 4 .

The switching entity in the present invention can be a mobile switching center in a mobile network, or an entity that completes switching functions in a public telephone switching network, or an entity that completes switching functions in a fixed communication network.

The special function switching entity described in the present invention may be an entity providing intelligent services for switching entities in a mobile communication network, or an entity providing charging services for switching entities in a mobile communication network, or an entity providing charging services for switching entities in a fixed communication network. The entity of the intelligent service, or the entity that provides the charging service for the switching entity in the fixed communication network.

Two specific embodiments are given below to illustrate the present invention. The first embodiment is the process of using the special function switching entity SSP of the fixed network to provide intelligent services for the terminal of the mobile network through the switching entity MSC of the mobile network, as shown in Figure 5 , Figure 5 is a schematic diagram of an embodiment of a terminal in a mobile network accessing a fixed network SSP according to the present invention, which includes: SSP500 and SCP501 in a fixed network, a terminal 502 in a mobile network, an MSC503 governing a terminal, and switching devices in other networks Entity 504, assuming that the MSC503 in the mobile network does not have the function of providing intelligent services, so when the terminal 502 initiates a call to obtain intelligent services, the MSC503 must obtain intelligent services from the SSP500 in the fixed network, and select routes according to the obtained intelligent services The call is routed to switching entity 504 in the other network.

The specific process shown in Figure 5 is: set up dual signaling points in SSP500 in advance, that is, set up signaling point A and signaling point B; set up two groups of relays to signaling point A and signaling point B respectively in MSC503 Group circuits, that is, trunk group circuit 1 and trunk group circuit 2. The CIC ranges of these two groups of trunk group circuits are the same. These two groups of trunk group circuits are not connected to the SSP500 through the transmission Perform cross self-loop on the trunk circuits with the same CIC in the two groups of trunk group circuits leading to signaling point A and signaling point B. When terminal 502 initiates an intelligent service call, MSC503 connects the call channel of terminal 502 to an idle trunk circuit in trunk group circuit 1, and routes the signaling to SSP500, carrying the idle trunk circuit The call of the CIC of the route is sent to the signaling point A of the SSP500 through the initial address message/initialization address message with additional information (IAI/IAM) of No. 7 signaling; Signaling for intelligent service interaction, allocating the trunk circuit in trunk group circuit 2 that has the same trunk circuit as the carried CIC as the loopback channel, and passing the CIC of trunk circuit 2 from signaling point B of SSP500 through No. 7 The signaling IAI/IAM is sent to MSC503; after receiving the call from SSP500, MSC503 continues to connect to switching entity 504 in other networks.

In this way, the call channel initiated by the terminal 502 is only looped at the MSC503, and does not need to be detoured to the SSP500.

The second embodiment is used for the billing of long-distance calls in a certain place overseas, as shown in Figure 6, which is a schematic diagram of an embodiment of the remote access of the terminal in the mobile network of the present invention to the Pre-paid Platform: when the terminal 600 is no longer When the contracted place initiates a long-distance call, that is, there is no special function switching entity in the local network where the terminal is located, the terminal must connect the call to the Pre-paid Platform of the contracted place through the switching entity MAC in the local network. Communications are billed.

The specific process shown in Fig. 6 is: set double signaling points in Pre-paid Platform 602 in advance, that is, set signaling point A and signaling point B; Two groups of trunk group circuits to signaling point A and signaling point B, that is, trunk group circuit 1 and trunk group circuit 2, the CIC ranges of these two groups of trunk group circuits are the same, and the two groups of trunk group circuits It is not connected to the Pre-paid Platform 602 through the transmission relay, but the trunk circuit with the same CIC in the two sets of trunk group circuits leading to signaling point A and signaling point B is self-looped at MSC401. When terminal 600 initiates a toll call, MSC401 connects the channel of terminal 600's toll call to an idle trunk circuit in trunk group circuit 1, and routes the signaling to Pre-paidPlatform602, which will carry the idle trunk The call of the CIC of the circuit is sent to the signaling point A of the Pre-paid Platform 602 through the IAI/IAM of No. 7 signaling; after the Pre-paid Platform 602 receives the call, it starts the charging function and will carry the idle trunk The charging information of the CIC of the circuit is sent from the signaling point B of the Pre-paid Platform 602 to the MSC601 through the IAI/IAM of No. 7 signaling; after receiving the call from the Pre-paid Platform 602, the MSC601 continues to connect to Switching entities 603 in other networks.

In this way, the channel of the long-distance call initiated by the terminal 600 is only looped at the MSC601, and does not need to be detoured to the Pre-paid Platform 602.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention. within the scope of protection.

Claims (10)

1, a kind of method that solves the roundabout of speech path, it is characterized in that, the incoming trunk group circuit of switching entity to special function switching entity and the outgoing trunk group circuit of special function switching entity to switching entity, two trunk groups are set The corresponding relationship of the circuit, in the switching entity, the two trunk group circuits with the corresponding relationship are crossed and self-looped, and the method also includes: A. When the switching entity receives a call initiated by the terminal to access the special function switching entity, it assigns the call to an incoming trunk circuit in the incoming trunk group circuit as a voice path, and carries the assigned incoming trunk The call of the circuit identification code of the circuit is sent by signaling to the special function switching entity; B. After receiving the call, the special function switching entity performs corresponding processing on the call, and obtains the outgoing trunk in the outgoing trunk group circuit corresponding to the circuit identification code assigned to the incoming trunk circuit according to the set corresponding relationship The circuit sends the processed call to the corresponding outgoing trunk circuit in the switching entity through signaling; C. After the switching entity receives the processed call sent from the special function switching entity, it continues to connect. 2. The method according to claim 1, characterized in that, the receiving signaling point and the sending signaling point are set in the special function switching entity; The incoming trunk group circuit is a receiving signaling point set from the switching entity to the special function switching entity; The outgoing trunk group circuit is set from the signaling point of the special function switching entity to the switching entity. 3. The method according to claim 1, characterized in that a signaling point is set in said special function switching entity; The incoming trunk group circuit is the signaling point set from the switching entity to the special function switching entity; The outgoing trunk group circuit is set from the signaling point of the special function switching entity to the switching entity. 4. The method according to claim 1, characterized in that the number of incoming trunk circuits in the set incoming trunk group circuits is the same as the number of outgoing trunk circuits in the outgoing trunk group circuits. 5. The method according to claim 1, wherein the corresponding relationship between the two trunk group circuits is that the incoming trunk circuit and the outgoing trunk circuit in the incoming trunk group circuit with the same circuit identification code The outgoing trunk circuit in the trunk group circuit establishes a corresponding relationship; Or establish a corresponding relationship between the incoming trunk circuits in the incoming trunk group circuits and the outgoing trunk circuits in the outgoing trunk group circuits with the same order. 6. The method according to claim 1, characterized in that the cross self-loop is that the sending end/receiving end of the incoming trunk circuit in the incoming trunk group circuit has a corresponding relationship with the outgoing trunk group circuit The receiving end/sending end of the outgoing trunk circuit is connected. 7. The method according to claim 1, characterized in that the switching entity is a mobile switching center in a mobile network, or an entity that completes switching functions in a public telephone switching network, or an entity that completes switching functions in a fixed communication network. An entity that exchanges functions. 8. The method according to claim 1, wherein the special function switching entity is an entity providing intelligent services for the switching entity in the mobile communication network, or an entity providing charging services for the switching entity in the mobile communication network The entity, or the entity that provides intelligent services for the switching entity in the fixed communication network, or the entity that provides charging services for the switching entity in the fixed communication network. 9. The method according to claim 1, wherein the signaling is common channel signaling. 10. The method according to claim 1, wherein the call to access the special function switching entity in step A is a call requiring a special function switching entity to trigger an intelligent service, or a call requiring a special function switching entity to trigger a charging service calls, or calls that trigger communication services for special function switching entities. The corresponding processing of the call described in step B is triggering an intelligent service, or triggering a billing service, or triggering a communication service.

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