WO2006034625A1

WO2006034625A1 - A method for implementing telephone channel source optimization

Info

Publication number: WO2006034625A1
Application number: PCT/CN2005/001380
Authority: WO
Inventors: Xuehai Zhou; Shiqian Li; Shaohui Lu; Yan Li
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2004-09-27
Filing date: 2005-09-01
Publication date: 2006-04-06
Also published as: AR051120A1

Abstract

The present invention discloses a method for implementing telephone channel source optimization, the method includes: The first switch entity sends a calling associative signaling with the first circuit identification to a auxiliary entity, after the auxiliary entity executes process, find out the second circuit identification corresponding to the first circuit identification according to the storage physical connected relation, Then sends the calling associative signaling with the second circuit identification to the second switch entity, the second switch entity joints a calling successfully, the telephone channel of the current jointed calling takes the circuit corresponding to the first circuit identification and the circuit corresponding to the second circuit identification as the trunks. According to the method, the physical telephone channel not has to switch by the auxiliary entity to achieves the directly telephone channel that from the first switch entity to the second switch entity by separates the logic telephone channel topological network from the physical telephone channel network, to avoids the waste of telephone channel and achieves the optimization for telephone channel source, so that decreases the cost and maintenance cost.

Description

A method for realizing channel resource optimization

Technical field

The invention relates to a voice path routing technology, in particular to a method for realizing voice channel resource optimization. Background of the invention

At present, new services are emerging one after another. If large-scale changes are made to existing communication network equipment to provide new services, it will inevitably require a large investment of funds, and it will also make the service delivery period too long, and will greatly affect the stability of the communication network. For the above problems, the implementation of the overlay network is proposed. That is, an intelligent network device is superimposed on the existing communication network, which is called OVERLAY mode, so as to quickly provide new services.

Figure 1 shows the call implementation in the OVERLAY mode. As shown in Figure 1, the call in the OVERLAY mode is implemented through the tandem, that is, the switching entity 1 sends an initial address message to the service switch point (SSP). For example, IAM, Initial Address Message (IAI, Initial Address Message with Information); After the SSP receives the initial address message, it determines that it is an intelligent service, and the service control point (SCP) After the intelligent processing process is completed, the service control point sends an initial address message to the switching entity 2; after receiving the initial address message, the switching entity 2 performs number analysis, and then connects the call, and the switching entity 1 and the switching entity 2 make a call. The voice path is not directly exchanged by the switching entity 1 to the switching entity 2, but is connected through the SSP, that is, the voice path passes through the switching entity 1, the SSP and the switching entity 2, respectively, so that the voice path is detoured, resulting in the dialogue channel resource. Waste, especially in places where transmission resources are tight or expensive, this contradiction is increasingly prominent. Summary of the invention

In view of this, an object of the present invention is to provide a method for realizing channel resource optimization, which avoids waste of conversation path resources.

In order to achieve the above object, the present invention provides a method for implementing voice channel resource optimization, the method comprising the step A: a first switching entity sends a call related signaling carrying a first circuit identifier to a secondary entity, and the auxiliary entity performs processing. And finding, according to the stored physical connection relationship, the second circuit identifier corresponding to the first circuit identifier, and then sending the call related signaling carrying the second circuit identifier to the second switching entity, where the second switching entity successfully connects the call, and the current The channel of the successive call is a voice path with a circuit corresponding to the first circuit identification and a circuit corresponding to the second circuit identification.

The method further includes the step B: the auxiliary entity receives the call-independent signaling sent by the first/second switching entity, where the call-independent signaling carries the first/second circuit identifier, and according to the stored physical connection relationship, A second/one circuit identification corresponding to the first/second circuit identification is found, and then call-independent signaling carrying the second /-circuit identification is transmitted to the second/one switching entity.

The step B further includes: the auxiliary entity receiving the response message sent by the second/a switching entity as the call-independent signaling, where the response message carries the second/one circuit identifier, according to the stored physical connection relationship. And finding a first I-two circuit identifier corresponding to the second/first circuit identifier, and then sending a response message carrying the first I-two circuit identifier to the first/second switching entity.

The step A further includes: configuring a signaling link of the switching entity to the secondary entity. The step A further includes: configuring a circuit of the switching entity to the auxiliary entity, the circuit having no physical connection relationship with the auxiliary entity.

If the physical connection relationship is a correspondence between circuit identification codes, the circuit is identified as a circuit identification code. If the circuit is a relay circuit group, the correspondence between the circuit identification codes is a correspondence between a circuit identification code in the first relay circuit group and a circuit identification code in the second relay circuit group. .

The first circuit is directly connected to the physical relay of the second circuit.

The circuit identification is selected by the first switching entity based on the call information.

The first switching entity and the second switching entity are the same switching entity.

In the intelligent call, the auxiliary entity is a service switching point, and the method further includes the following steps:

The C service switching point receives the smart call routed by the switching entity using the virtual circuit, and notifies the service control point that the smart call is an intelligent call using a virtual circuit;

D. The service control point uses the real circuit between the switching entity and the calling party of the intelligent call to interact.

The step C and D include: the service control point determines whether it needs to interact with the user of the smart call, and if yes, performs step C; otherwise, instructs the service switching point to continue the subsequent processing flow.

The smart call received by the service switching point in step C is: The smart call sent by the switching entity through the first start address message, where the first start address message carries the calling number and the called number of the smart call.

In step C, the service switching point notifies the service control point that the smart call is an intelligent call using a virtual circuit by using a start detection point message reported to the service control point.

The step of implementing the notification by starting the detection point message is specifically: starting the detection point, the message does not carry the IPSSPCapability cell; or starting one or more of the extended bytes of the IPSSPCapability cell in the detection point message. The ones are used as virtual circuit intelligent call identification; or a reserved value or idle value of the CallingPartysCategory cell in the start detection point message is used as the identifier of the virtual circuit intelligent user. Step D further includes the step of the service control point establishing a real circuit connection between the service control point and the switching entity, where the step is: the service control point instructs the service switching point to establish a real circuit connection between the auxiliary intelligent device and the switching entity, and the step The interaction between the service control point in D and the calling subscriber line of the intelligent call is: The service control point interacts with the calling user of the intelligent call through the auxiliary smart device and the switching entity.

The secondary smart device is an intelligent peripheral that is independent of the service switching point or physically the same entity as the service switching point.

In step D, the service control point instructs the service switching point to establish a real circuit connection between the auxiliary smart device and the switching entity, including:

D01, the service 4 air system sends the routing address of the auxiliary smart device to the service switching point, and the service switching point sends the routing address of the auxiliary smart device to the switching entity through the virtual circuit;

D02. The switching entity initiates a connection to the auxiliary smart device through the real circuit, and the auxiliary intelligent device notifies the service control point that the real circuit connection with the switching entity has been established.

Step D01 includes: the service control point sends a setup temporary connection message including the secondary smart device routing address and the associated identifier to the service switching point; the service switching point uses the virtual circuit and routes the intelligent call to the switching entity by using the second starting address, The second start address message includes the calling number of the smart call, the routing address of the secondary smart device, and the call association identifier.

Step D02 includes: the switching entity uses the real circuit and routes the smart call to the auxiliary smart device by using the third start address message according to the routing address of the secondary smart device included in the second start address message, and the third start address message includes the smart The calling number of the call, the routing location of the secondary smart device, and the call association identifier; the secondary smart device sends an auxiliary request command to the service control point, the help request command includes a call association identifier, and the service control point is notified that the call has been associated with the call The corresponding smart call establishes a temporary real circuit connection.

Step D02 includes: the switching entity performs address translation on the routing address of the secondary smart device included in the second start address message, uses a real circuit and uses the third start address message to intelligently The call is routed to the auxiliary smart device, and the third start address message includes the calling number of the smart call, the address-changed routing address, and the call association identifier; the auxiliary smart device sends an auxiliary request to the service control point, the auxiliary request The instruction includes a call association identifier, and the service control point is notified that a temporary real circuit connection has been established for the smart call corresponding to the call association identifier.

In step D, the service control point interacts with the calling party of the intelligent call through the auxiliary smart device and the switching entity:

Dl1, the service control point sends a message to the JJi service switching point to interact with the user;

D12. The service switching point enables the monthly real circuit, and interacts with the calling user of the intelligent call through the auxiliary smart device and the switching entity.

The step of establishing a real circuit connection between the auxiliary intelligent device and the switching entity by the service switching point is specifically: the service switching point controls the first switching entity to establish a real circuit connection with the second switching entity according to the stored physical connection relationship, And then controlling the auxiliary intelligent device to establish a real circuit connection with the first switching entity or the second switching entity; the step of the service control point interacting with the calling user of the intelligent call by the auxiliary smart device and the switching entity is specifically: the service control point passes The real circuit connection between the secondary smart device and the first switching entity or the second switching entity, the real circuit connection between the first switching entity and the second switching entity interacts with the calling user of the intelligent call.

After the step D, the method further includes: the auxiliary smart device notifying that the service control point has completed the user handover, and the service control indicating that the service switching point releases the circuit connection between the service switching point and the auxiliary smart device; the service switching point uses the virtual circuit and passes the The four start address message routes the smart call to the switching entity, and the fourth start address message includes the called number of the smart call, and the switching entity routes the smart call to the switching entity where the called number is located, and is exchanged by the called number The entity connects to the called number of the smart call.

The service control point refers to a service switching point releasing a service switching point and an auxiliary smart device. The circuit connection between the two is specifically: the service control point instructs the blood switching point to send a release message to the switching entity, and the virtual road connection between the service switching point and the switching entity is released; the switching entity sends a release message to the secondary intelligent device, and the switching entity The real circuit connection between the fr-assisted smart devices is released.

The interaction with the calling user of the smart call is: playing a notification tone to the calling user of the smart call and/or collecting the key information of the intelligent calling calling user.

The step D further includes: during the call between the calling user and the called user, the service switching point determines that the user needs to interact with the intelligent call, and provides a reason value to the exchange entity where the user is located, and the switching entity receives the The original value, interacting with the user.

The cause value is carried in the call procedure CPG message or carried in the release REL message. The method further includes: if the user ^calls the user, the service switching point provides a reason value to the exchange entity where the called user is located, and the handoff entity interacts with the called user according to the received cause value; If the user is the called i3⁄4 household, the service switching point provides the reason value to the switching entity where the calling user is located, and the switching entity interacts with the calling user according to the received reason value.

According to the method provided by the present invention, by separating the logical voice path topology network from the physical voice network network, the physical voice channel does not have to be transferred through the auxiliary device, so as to realize the direct routing of the first switching entity to the second switching entity. It avoids the waste of the channel resources caused by the call back, completes the optimization of the dialogue channel resources, and greatly reduces the investment and maintenance costs of the operation communication network.

In addition, the present invention also provides a processing method for interacting with a user by using a virtual circuit ^ intelligent call process, that is, if the SCP needs to interact with the calling user of the intelligent call, establishing an exchange entity with the user of the smart call Temporary real circuit connection, SCP uses real circuit to interact with the user of intelligent call, the processing method provided by the present day and month can realize the interaction between the SCP and the user in the intelligent call process using the virtual circuit, and preferably, by Auxiliary smart device and SSP can be combined to make full use of the temporary real circuit connection Existing equipment resources. Moreover, the implementation of the intelligent service is more flexible by extending the IDP message on the standard interface. The invention also provides a processing method of playing after the call is established, and further realizes interaction between the network side and the user. In summary, under the premise of fully conserving the channel resources, the present invention ensures the normal interaction of user interaction in the intelligent call, and improves the satisfaction of the intelligent user to the service provider that provides the intelligent service. BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 shows a schematic diagram of a call implementation in the OVERLAY mode;

2 is a schematic diagram showing the implementation of a call in the OVERLAY mode in the present invention;

FIG. 3 is a schematic diagram showing the implementation of a call in Embodiment 1 of the present invention; FIG.

4 is a schematic diagram showing the implementation of the embodiment of the present invention with the user; FIG. 5 is a flow chart showing an embodiment of the present invention for implementing playback in an intelligent call using a virtual circuit;

Fig. 6 is a flow chart showing a second embodiment of the present invention for playing sound in an intelligent call using a virtual circuit. Mode for carrying out the invention

In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the present invention will be further described in detail in conjunction with the accompanying drawings.

2 is a schematic diagram of a call implementation in an OVERLAY mode according to the present invention. As shown in FIG. 2, first, a signaling link 1 of a switching entity 1 to an auxiliary entity, and a signaling link 2 of a switching entity 2 to an auxiliary entity are configured; Switching entity 1 to the relay circuit group 1 of the auxiliary entity, configuring the switching entity 2 to the relay circuit group 2 of the auxiliary entity, but each relay circuit group is not physically connected to the auxiliary entity, but will be relayed The physical relays of the circuit group 1 and the relay circuit group 2 are directly connected correspondingly, and the physical connection relationship is stored in the auxiliary entity, and the recording relay circuit group 1 is recorded. The correspondence between the circuit identification code (CIC) and the CIC in the relay group circuit 2. The CIC is used to uniquely identify each circuit included in the trunk circuit group. The corresponding relationship between the CICs is stored in the entity, that is, a complete connection of a channel is stored. The correspondence between the CIC in the relay circuit group 1 and the CIC in the relay group circuit 2 means that the CIC 111 corresponds to the CIC 211, the CIC 133 corresponds to the CIC 233, etc., that is, in the physical connection, the circuit CIC 111 and The circuit CIC211 is connected to form a voice channel, which provides a path for the user when the user talks; connects the circuit CIC 133 and the circuit CIC 233 to form a voice channel, and provides a path for the user when the user talks.

The user of the switching entity 1 initiates a call through the switching entity 1, and the switching entity 1 aligns with the link, such as the Integrated Services Digital Network User Part (ISUP) of the SS7. The entity sends call related signaling, such as an initial address message, which carries the CIC1 selected by the switching entity 1 according to the call information such as the called identity. After receiving the call related signaling, the auxiliary entity determines that it is an intelligent service, and after interacting with the network entity to complete the intelligent processing flow, according to the physical connection of the storage, such as the correspondence between CIC, find the CIC2 corresponding to CIC1. Then, call related signaling carrying CIC2 is transmitted to the switching entity 2 via the signaling link 2. After the exchange entity 2 <| detects the call related signaling, the call is successfully connected. In the switching entity 1, the trunk channel occupied by the call is the voice channel CIC 111 in the trunk group 1, and the trunk voice channel occupied by the call in the switching entity 2 is the voice channel CIC211 in the trunk group 2, although There are two codes logically, but the same voice path on the actual physical connection. Therefore, the session no longer passes through the auxiliary entity, and the direct connection between the exchange entity 1 and the exchange entity 2 is realized, and the optimization of the dialogue path resource is completed.

For call related signaling, the secondary entity performs corresponding processing and sends it to the corresponding switching entity. For signaling that is not related to call events, such as circuit management signaling, circuit maintenance signaling, etc., the secondary entity only performs translation and forwarding processing. For example, the auxiliary entity receives the circuit management signaling sent by the switching entity 1, and the circuit management signaling carries the CIC1, and the auxiliary entity identifies the received message. For the signaling unrelated to the call event, according to the correspondence between the stored CICs, the CIC2 corresponding to the CIC1 is found, and then the circuit management signaling carrying the CIC2 is transmitted to the switching entity 2; the switching entity 2 receives the circuit management After the signaling, the corresponding processing is performed, and then the response message carrying the CIC2 is sent to the auxiliary entity; after receiving the response message, the auxiliary entity finds the CIC1 corresponding to the CIC2 according to the correspondence between the stored CICs, and then sends the CIC1 to the switching entity. 1 Sending a response message carrying CIC1, in the above process, the role played by the auxiliary entity is similar to the function of the Signal Transfer Point (STP).

In order to make the implementation process of the present invention clearer, the descriptions of the above switching entity 1, switching entity 2 are merely examples, and thus the corresponding relay circuit group is merely an example, and does not indicate that only the auxiliary entities in the present invention are included. The correspondence between the CICs in the two relay circuit groups is stored, but the correspondence between the CICs in the relay circuit group corresponding to the plurality of different switching entities is stored.

In addition, the switching entity 1 and the switching entity 2 may be the same switching entity, and the implementation process is basically the same as the above description, and details are not described herein again.

The auxiliary entities described above may be SSPs, prepaid platforms, and the like. The switching entities described above may be a Mobile Switching Center (MSC), a switch in a Public Switch Telephone Network (PSTN), and the like. The network entities described above may be SCPs, Home Location Registers (HLRs), and the like.

FIG. 3 is a schematic diagram of Embodiment 1 of the present invention. As shown in FIG. 3, first, the signaling link 1 of the MSC to the SSP, the signaling link 2 of the PSTN switch to the SSP, and the relay power of the MSC to the SSP are configured. Road group 1, the PSTN switch is configured to the relay circuit group 2 of the SSP, but the relay circuit group 1 and the relay circuit group 2 are not physically connected to the auxiliary entity, but the relay circuit group 1 and The relay circuit group 2 is physically directly connected, and the SSP stores a physical connection relationship, and records the correspondence between the CIC in the relay circuit group 1 and the CIC in the relay group circuit 2. In terms of exchange entities, their configuration is basically the same as the ordinary overlay network, and they still need to be configured. The entity is switched to the trunk circuit group of the secondary entity, except that the trunk circuit group is not actually connected to the secondary entity.

The MSC user initiates a call to the PSTN user. For example, the user of the MSC is a prepaid (PPC) service user, and the MSC needs to route the call to the SSP. Therefore, the MSC sends the call related signaling carrying the CIC1 to the SSP through the signaling link 1. The CIC1 can be selected by the MSC according to the called identity or the like. After receiving the call related signaling, the SSP triggers the SCP to complete the intelligent processing flow of the prepaid service. After the SSP completes the intelligent processing flow of the prepaid service, the SSP finds the CIC2 corresponding to the CIC1 according to the correspondence between the stored CICs, and then sends the CIC2 through the signaling link 2 The PSTN switch sends call related signaling carrying CIC2. After receiving the call related signaling, the PSTN switch successfully connects the call. The trunk voice occupied by the call is CIC1 in the view of the MSC and CIC2 in the PSTN. Although there are two codes logically, the actual physical is The same way. Therefore, the session no longer passes through the SSP, and the direct connection between the MSC and the PSTN switch is realized.

For signaling that is not related to the call event, if the SSP receives the occlusion signaling sent by the MSC, the occlusion signaling carries CIC1; the SSP recognizes that the signaling is signaling independent of the call event, according to the stored CIC Corresponding relationship, find CIC2 corresponding to CIC1, and then send occlusion signaling carrying CIC2 to the PSTN switch; after receiving the occlusion signaling, the PSTN switch performs corresponding processing, and then sends a response message carrying CIC2 to the SSP; After receiving the response message, the SSP finds the CIC1 corresponding to the CIC2 according to the correspondence between the stored CICs, and then sends a response message carrying the CIC1 to the MSC. For example, when the SSP receives the occlusion signaling sent by the MSC, the occlusion signaling carries the CIC2; the SSP recognizes that the signaling is signaling independent of the call event, and finds and CIC2 according to the correspondence between the stored CICs. The corresponding CIC1 then sends the occlusion signaling carrying the CIC1 to the PSTN switch; after receiving the occlusion signaling, the PSTN switch performs corresponding processing, and then sends a response message carrying the CIC1 to the SSP; after receiving the response message, the SSP receives the response message according to Correspondence between stored CICs, find CIC2 corresponding to CIC1, and then send a signal carrying CIC2 to the MSC Should be the message.

According to the above description, if the auxiliary entity needs to interact with the user through the switching entity, for example, in the smart call, if the calling user balance is found to be small, and the user needs to be voiced to remind the user, there is no real between the exchange entity and the auxiliary entity. The circuit connection is only a virtual circuit connection. At this time, the user will not be able to hear the voice prompt. Therefore, the present invention further proposes a method for implementing interaction with the user in the intelligent call. The following is a specific implementation process for implementing interaction with the user. Describe.

In the intelligent call process using the virtual circuit, if the SCP needs to interact with the user of the intelligent call, establish a temporary real circuit connection between the user and the smart call user, if the user of the smart call is currently located at the exchange entity 1, then establish The secondary IP is exchanged between the IP and the switching entity 2, and then the SCP interacts with the user using the voice path between the secondary IP and the switching entity 2, and the voice between the switching entity 2 and the switching entity 1. In this paper, the process of interacting with the user by the SCP generally includes: the SCP plays the notification tone to the user, the SCP collects the key information of the user, etc., but the present invention is not limited to playing and receiving numbers, and includes other real circuits that need to be utilized. The interaction with the user.

FIG. 4 is a schematic diagram showing the implementation of the interaction between the user and the user in the first embodiment of the present invention. When the SCP determines that the user needs to interact with the user, the SSP is instructed to establish a temporary real circuit, and the SSP establishes the exchange entity and the user where the user is located according to the stored physical connection relationship. The real circuit connection between the end switching entities, and then notifying the user that the switching entity and the peer switching entity establish a real circuit connection with the auxiliary IP, so that the SCP can provide a real circuit between the auxiliary IP and the peer switching entity. The connection between the peer, the peer switching entity, and the switching entity of the user is interacting with the user. If the user is the calling user, the switching entity of the user is the calling exchange entity, and the peer switching entity is the called switching entity. If the user is the called user, the switching entity of the user is the called switching entity, and the peer switching entity Calling the exchange entity.

The following is a description of the method for realizing user interaction in an intelligent call by taking playback as an example. FIG. 5 is a flowchart of Embodiment 1 for implementing playback in an intelligent call using a virtual circuit in the present invention. It is assumed that the calling user of the smart call is a smart user, the calling party number is 88888888, and the called party number is 99999999. The calling user is a user under the MSC, and the called user is a user under the PSTN switch. The calling user number is referred to as the calling number, and the called user number is simply referred to as the called number, as shown in FIG. The specific implementation process includes the following steps:

Step 501: The MSC receives the smart call of the calling party with the number 88888888, and the called number of the intelligent call is 99999999. After analyzing that the called number 99999999 does not belong to the service number, the smart call is started by the start address message (IAM) 1. Routed to the SSP, the IAM1 carries the calling number 88888888, the called number 99999999, and the selected CIC is a virtual CIC. The service number can refer to the number that clearly requires the use of the playback and collection process.

Step 502: After receiving the smart call routed by the MSC, the SSP reports an Initiation Detection Point (IDP) message to the SCP, and the IDP message is used to notify the SCP that the smart call is an intelligent call using a virtual circuit. In step 502, the SCP can be notified that the smart call is an intelligent call using a virtual circuit by not including the IPSSPCapability cell in the IDP message; since the length of the IPSSPCapability cell is 4 bytes, the current 3GPP protocol only defines the first 1 byte, the last 3 bytes are extended bytes, so that the IPSSPCapability cell can be extended to notify the SCP that the smart call is an intelligent call using a virtual circuit; the calling user category is indicated in the IDP message. The CallingPartysCategory cell currently has multiple reserved bits, and one of the reserved bits can be selected as the virtual circuit user type identifier. Thus, the CallingPartysCategory cell can be extended to notify the SCP that the smart call is virtual. Smart call for the circuit.

Step 503: After receiving the IDP message, the SCP determines the calling rate according to the relevant cell carried in the IDP message, and converts the balance into the duration of the call. If the balance of the calling user is not enough, the SSP sends the temporary to the SSP. Connection (ETC) message, which is carried in the ETC message The intelligent peripheral (IP) routing address AA12345 and a call association identifier, which is an identifier for identifying the smart call.

Step 504: After receiving the ETC message, the SSP routes the smart call to the PSTN switch through the IAM2. The IAM2 carries the calling number 88888888, the called number AA12345, and the selected CIC is a virtual CIC. The IAM2 also carries the call association identifier. At the same time, the SSP controls the physical circuit connection between the MSC and the PSTN switch according to the stored physical connection relationship, such as the correspondence between the CICs.

Step 505: After receiving the IAM2, the PSTN switch routes the intelligent call to the auxiliary IP through the IAM3 according to the called number carried in the IAM2. The IAM3 carries the calling number 88888888, the called number AA12345, and the selected CIC is the real circuit CIC. IAM3 also carries a call association identifier. Through the real circuit CIC, the playback of the auxiliary IP can be heard by the calling user, and the key information of the calling user can also be transmitted to the auxiliary IP.

Step 506: After receiving the smart call, the secondary IP sends an auxiliary request command (ARI) message to the SCP, where the ARI message carries the call association identifier.

Step 507: After receiving the ARI message, the SCP determines the smart call corresponding to the temporary real circuit connection according to the call association identifier carried in the ARI message, and then sends a play notification tone (PA) message to the auxiliary IP, and specifies the secondary IP through the MSC. The user who dials the calling number of 88888888 of the smart call does not play a lot of sounds.

Step 508: The auxiliary IP plays a notification tone to the MSC through the actual CIC, for example, "Your balance is not much, please recharge in time", the calling user of the intelligent call listens to the notification tone forwarded by the MSC, and the actual CIC is through the auxiliary IP and Real circuit connection between PSTN switches, real circuit connection between PSTN and MSC.

Step 509: After the auxiliary IP playback is completed, the special resource report (SR) message is reported to the SCP, and the SCP is notified that the playback has been completed.

Step 510: After receiving the SRR message, the SCP sends a dry forward connection (DFC) to the SSP. Message.

Step 511: After receiving the DFC message, the SSP sends a release (REL) to the PSTN switch, and releases the virtual circuit connection between the PSTN switches, so that the virtual circuit connection between the SSP and the PSTN is released.

Step 512: After receiving the REL message, the PSTN switch forwards the REL to the secondary IP, and the real circuit connection between the secondary IP and the secondary IP is released, so that the real circuit connection between the PSTN switch and the secondary IP is released.

Step 513: After receiving the REL message, the secondary IP reports the temporary connection end (TC_END) message to the SCP, and sends a release complete (RLC) message to the PSTN switch.

Step 514: After receiving the RLC message, the PSTN switch sends the RLC message to the SSP. Step 515: After receiving the TC_END message, the SCP sends a request to the SSP to report the BCSM event (RRBE)/application charging (AC)/continuation (CONTINUE) message.

Step 516: The SSP routes the smart call to the PSTN switch through IAM4. The IAM4 carries the calling number 88888888, the called number 99999999, and the selected CIC is a virtual CIC.

Step 517: After receiving the IAM4, the PSTN switch analyzes the called number in the local office, and then continues the called number 99999999.

Step 518: The PSTN switch sends an address full message (ACM) 4 to the SSP to notify the SSP that the called party is actually ringing.

Step 519: The PSTN switch sends an acknowledgement message (ANM) 4 to the SSP to notify the SSP of the actual called response.

In the AC message of step 515, if the releaselfdurationExceeded flag is TRUE, it indicates that the user balance is not much, and only the length of time indicated by the maxCallPeriodDuration delivered in the AC message can be maintained. When the user can also talk for 30 seconds, the SSP will place the tone flag in the AC message of step 515 to determine whether to prompt the user. Step 520: If the tone flag in the AC message in step 515 is TRUE, since the SSP to the MSC only has a virtual circuit connection, the playback of the prompt tone will fail, that is, the prompt tone cannot be heard by the user, but the call is not affected. Still can continue.

Step 521: After 30 seconds, the total call duration is reached, the user balance has been used up, and the call needs to be removed. At this time, the SSP determines that the calling station MSC uses the virtual circuit connection, and sets a specific release cause value, and then performs the step. 623 and step 624.

Step 522: After the SSP determines that the call needs to be dismantled, it reports to the SCP through an Event Request Report (BCB) operation; and sends an Accounting Request (ACR) message to the SCP, requesting the SCP to perform the call charge deduction.

Step 523: The SSP sends a REL1 to the MSC, where the REL1 carries a specific release cause value of 1, and the MSC is notified to play the corresponding prompt tone to the calling user. After receiving the REL1, the MSC sends the REL1 according to the specific release cause value 1 in the REL1. Call the user to play, the prompt content can be "Your balance has been used up, please recharge after calling again" and so on. This compensates for the insufficiency of the playback in step 520 when the balance is not large, so that the calling user knows more clearly why the call was aborted.

Step 524: The SSP sends a REL2 to the PSTN switch, where the REL2 carries a specific release cause value of 2, and the PSTN switch plays a corresponding prompt tone to the called user. After receiving the REL2, the PSTN switch according to the specific release cause value carried in the REL2. 2, play the voice to the called user, the prompt content can be "the caller has run out of balance, end this call" and so on. This allows the called user to be more aware of the reason the call was aborted.

FIG. 6 is a flowchart of Embodiment 2 of the invention for implementing playback in an intelligent call using a virtual circuit. It is assumed that the calling user of the smart call is a smart user, the calling party number is 88888888, and the called party number is 99999999. The calling user and the called user are both users under the MSC. The following calling party number is referred to as the calling number, and the called user number is referred to as the short name. As shown in FIG. 6, the specific implementation process includes the following steps: Steps 601 to 603 are the same as steps 501 to 503.

Step 604: After receiving the ETC message, the SSP routes the smart call to the MSC through IAM2. The IAM2 carries the calling number 88888888, the called number AA12345, and the selected CIC is a virtual CIC. The IAM2 also carries the call association identifier.

Step 605: After receiving the IAM2, the MSC routes the intelligent call to the IT-enabled IP address through the IAM3 according to the called number carried in the IAM2. The IAM3 carries the calling number 88888888, the called number AA12345, and the selected CIC is the real circuit CIC. IAM3 also carries a call association identifier. Through the real circuit CIC, the playback of the auxiliary IP can be heard by the calling user, and the key information of the calling user can also be transmitted to the auxiliary IP.

Steps 606 to 607 are the same as steps 506 to 507.

Step 608: The auxiliary IP broadcasts a notification tone to the MSC through the actual CIC, for example, "Your balance is not enough, please recharge in time", and the calling party of the intelligent call listens to the notification sound forwarded by the MSC.

Step 609 to step 610 are the same as steps 509 to 510.

Step 611: After receiving the DFC message, the SSP sends a REL message to the MSC, releasing the virtual circuit connection between the MSCs, and the virtual circuit connection between the SSP and the MSC is released.

Step 612: After receiving the REL message, the MSC forwards the REL message to the secondary IP and releases the real circuit connection between the secondary IPs, so that the real circuit connection between the MSC and the secondary IP is released.

Step 613: After receiving the REL message, the auxiliary IP reports the TC_END message to the SCP, and sends an RLC message to the MSC.

Step 614: After receiving the RLC message, the MSC sends the RLC message to the SSP.

Step 615 is the same as step 515.

Step 616: The SSP routes the intelligent call to the MSC through IAM4, which is carried in IAM4. There is a calling number 88888888, a called number 99999999, and the selected CIC is a virtual CIC. Step 617: After the MSC receives the IAM4, the called number of the tree is in the local office, and the called number is 99999999.

Step 618: The MSC sends an ACM4 to the SSP to notify the SSP that the called party is actually ringing.

Step 619: The MSC sends an ANM4 to the SSP to notify the SSP of the actual called response. In the AC message of step 615, if the releaselfdurationExceeded flag is TRUE, it means that the user balance is not much, and only the length of time indicated by the maxCallPeriodDuration delivered in the AC message can be danced. When the user can still talk for 30 seconds, the SSP determines whether to give the user a tone according to the tone flag in the AC message of step 615.

Steps 620 to 623 are the same as steps 520 to 523'.

Step 624: The SSP sends a REL2 to the MSC, where the REL2 carries a specific release cause value of 2, and notifies the MSC to play the phase prompt tone to the called user. After receiving the REL2, the MSC according to the specific release cause value 2 carried in the REL2 The user is called to play the voice, and the prompt content may be "the caller's balance has been used up, the call is ended" and the like. This allows the called user to be more aware of why the call was aborted.

For the processing after the failure of the insufficient balance warning tone in step 520 or step 620, the SSP may also send a call procedure (CPG) to the MSC to indicate that the MSC is to be placed. At this time, there is a special requirement for the MSC, that is, the MSC can still maintain a normal call between the calling user and the called user when the MSC is playing the voice.

In the above description, the SCP utilizes the auxiliary IP MSC to insert and drop notification tones. In other implementations of the present invention, the SSP in FIG. 5 or FIG. 6 can be simulated into two SSPs: an initial SSP and an auxiliary SSP, and the SCP utilizes assistance. The SSP inserts a notification tone into the MSC. In this case, in step 605, the MSC needs to perform number change on the called number AA12345 in IAM2, for example, to be converted to BB12345, and then carry the message in the IAM3 message sent to the secondary SSP. Change The called number BB12345 is changed, and the purpose of the number change is to avoid the smart call routed to the secondary SSP and then routed back to the MSC.

The ETC message used in the above description is a message defined by the CAMEL Application Part (CAP, CAMEL Application Part) protocol. It should be understood that the present invention is not limited to the use of ETC messages, for example, other messages implementing similar functions may be used, such as using an intelligent network application. The implementation process of the ETC message or the CONNECT message defined by the protocol (INAP, Intelligent Network Application Protocol) is similar to the above description, and is not described here.

In the above description, the SSP notifies the SCP that a smart call is an intelligent call using a virtual circuit through an IDP message. The advantage of this method is that the existing ^ 7 message resources are fully utilized to make the service more flexible. It should be understood that in other implementations of the present invention, the SCP may be notified by other cells in the IDP message, or other notification methods may be used, such as the SSP may notify the SCP through a new message.

In the above description, the SCP issues a command to establish a real circuit connection when the caller balance of the smart call is insufficient. It should be understood that the present invention is not limited to issuing a command to establish a real circuit connection when the balance is not large, but includes all SCPs. Judging that it is necessary to interact with the user ^ issue a command to establish a real circuit connection, perform a process of interacting with the user through a real circuit, such as playing or receiving a number, and then connect the called number through the virtual circuit.

According to the above description, if the user of the smart call is the called user, the interaction with the called user can also be achieved through the above processing manner.

The above MSC may be a port MSC (VMSC), and the above L SSP may be an MSC/SSP with a handover function. The auxiliary IP can be combined with the SSP, that is, the SSP can implement the function of the auxiliary IP.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, and improvements made within the spirit and principles of the present invention should be included in the present invention. Within the scope of protection.

Claims

Claim

A method for realizing channel resource optimization, characterized in that the method package:

A. The first switching entity sends the call related signaling carrying the first circuit identifier to the auxiliary entity, and after processing, the auxiliary entity finds the second circuit identifier corresponding to the first circuit identifier according to the stored physical connection relationship, and then Transmitting, to the second switching entity, the call related signaling carrying the second circuit identifier, the second switching entity successfully connecting the call, and the voice path of the current connected call is corresponding to the circuit of the first circuit identifier and corresponding to the second circuit identification circuit The road.

2. The method according to claim 1, wherein the method further comprises:

B. The auxiliary entity receives the call-independent signaling sent by the first/second switching entity, where the call-independent signaling carries the first/second circuit identifier, and is found according to the physical connection relationship of the storage. The one/two circuit identifies a corresponding second/one circuit identification, and then sends a call-independent signaling carrying the second/one circuit identification to the two/one switching entity.

The method according to claim 2, wherein the step B further comprises: the auxiliary entity receiving a response message sent by the second/a switching entity as a call-independent signaling, where the response message is received. Carrying the second/first circuit identifier, according to the physical connection relationship, finding the first/second circuit identifier corresponding to the second/first circuit identifier, and then sending the first/second switching entity to carry the first/ The response message of the two circuit identification.

The method according to claim 1, wherein the step A further comprises: configuring a signaling link of the switching entity to the auxiliary entity.

The method according to claim 1 or 2, wherein before the step A, the method further comprises: configuring a circuit of the switching entity to the auxiliary entity, the circuit having no physical connection relationship with the auxiliary entity.

The method according to claim 5, wherein if the connection relationship in the object 3 is a correspondence between circuit identification codes, the circuit identification is a circuit identification.

The method according to claim 6, wherein if the circuit is a relay circuit group, the correspondence between the circuit identification codes is a circuit identification code and a first circuit group in the first relay circuit group. Correspondence between circuit identification codes in the two relay circuit groups.

8. The method of claim 5 wherein the first circuit is directly coupled to the physical relay of the second circuit.

The method of claim 1, wherein the circuit identification is selected by the first switching entity based on the call information.

The method according to claim 1, wherein the first switching entity and the second switching entity are the same switching entity.

The method according to claim 1 or 2, wherein, in the intelligent call, the auxiliary entity is a service switching point, and the method further comprises the following steps:

C. The service switching point receives the smart call routed by the switching entity using the virtual circuit, and notifies the service control point that the smart call is an intelligent call using a virtual circuit;

12. The method according to claim 11, wherein the step C and D comprise: the service control point determining whether it is necessary to interact with the user of the smart call, and if yes, performing step C; otherwise, Instruct the service switching point to continue the subsequent processing.

The method according to claim 11, wherein the smart call received by the service switching point in step C is: an intelligent call sent by the switching entity by using a first start address message, the first start address message The calling number and the called number carrying the smart call.

The method according to claim 11, wherein in step C, the service switching point notifies the service control point that the smart call is an intelligent call using a virtual circuit by using a start detection point message reported to the service control point. .

The method according to claim 14, wherein the step C is implemented by starting the detection point message, which is: carrying the IPSSPCapability cell in the startup detection point message; or starting the detection point One or more bits in the extended byte of the IPSSPCapability cell in the message are used as the identifier of the virtual circuit intelligent call; or a reserved value or idle value of the CallingPartysCategory cell in the start detection point message is used as the virtual circuit intelligent user Logo.

The method according to claim 11, wherein the step D further comprises the step of the service control point establishing a real circuit connection between the service control point and the switching entity, the step specifically: the service control point indicating the service switching point Establish a real circuit connection between the auxiliary smart device and the switching entity,

The service control point in step D interacts with the calling user of the smart call as follows: The service control point interacts with the calling user of the intelligent call through the auxiliary smart device and the switching entity.

The method according to claim 16, wherein the auxiliary smart device is an intelligent peripheral device independent of a service switching point, or physically identical to a service switching point.

The method according to claim 16, wherein in step D, the service control point indicates that the service switching point establishes a real circuit connection between the auxiliary smart device and the switching entity, including:

D01. The service control point sends the routing address of the secondary smart device to the service switching point, and the service switching point sends the routing address of the secondary smart device to the switching entity through the virtual circuit.

The method according to claim 18, wherein the step D01 comprises: the service control point sends an establishment temporary that includes the secondary smart device routing address and the associated identifier. Connect the message to the service switching point;

The service switching point uses the virtual circuit and routes the intelligent call to the switching entity through a second start address message containing the calling number of the intelligent call, the routing address of the secondary smart device, and the call association identifier.

20. The method according to claim 19, wherein the step D02 comprises: the switching entity using the real circuit and passing the third start address message according to the routing address of the secondary smart device included in the second start address message Routing the smart call to the auxiliary smart device, where the third start address message includes the calling number of the smart call, the routing address of the secondary smart device, and the call association identifier;

The secondary smart device sends an auxiliary request command to the service control point, the auxiliary request command including a call association identifier, and notifying the service control point that a temporary real circuit connection has been established for the smart call corresponding to the call association identifier.

The method of claim 19, wherein the step D02 comprises: the switching entity performs address translation on the routing address of the secondary smart device included in the second start address message, using the real circuit and passing the third and third start The address message routes the smart call to the auxiliary smart device, and the third start address message includes the calling number of the smart call, the address-changed routing address, and the call association identifier;

22. The method according to claim 16, wherein in step D, the service control point interacts with the calling user of the intelligent call by the auxiliary smart device and the switching entity, including:

Dl1, the service control point sends a message to the service switching point to interact with the user;

D12, the service switching point uses a real circuit, and through the auxiliary smart device and the exchange entity The calling user of the intelligent call interacts.

The method according to claim 16, wherein the step of establishing a real circuit connection between the auxiliary intelligent device and the switching entity by the service switching point is specifically: the service switching point is controlled according to the stored physical connection relationship. The first switching entity establishes a real circuit connection with the second switching entity, and then controls the auxiliary smart device to establish a real circuit connection with the first switching entity or the second switching entity;

The step of the service control point interacting with the calling user of the smart call by the auxiliary smart device and the switching entity is specifically: the physical control point of the service control point between the auxiliary smart device and the first switching entity or the second switching entity, The real circuit connection between the first switching entity and the second switching entity interacts with the calling user of the intelligent call.

The method according to claim 16, wherein the step D further comprises:

The auxiliary intelligent device notifies the service control point that the user interaction has been completed, and the service control point instructs the service switching point to release the circuit connection between the service switching point and the auxiliary smart device;

The service switching point uses the virtual circuit and routes the intelligent call to the switching entity through the fourth start address message, the fourth start address message includes the called number of the smart call, and the switching entity routes the intelligent call to the switching entity where the called number is located And the called party number of the smart call is connected by the exchange entity where the called number is located.

The method according to claim 24, wherein the service control point indicates that the circuit connection between the service switching point release service switching point and the auxiliary smart device is: the service control point instructs the service switching point to send a release message. To the switching entity, the virtual circuit connection between the service switching point and the switching entity is placed;

The switching entity sends a release message to the secondary smart device, and the real circuit connection between the switching entity and the secondary smart device is released.

The method according to claim 11, wherein said intelligent call The calling user performs the interaction by: playing a notification tone to the calling user of the smart call and/or collecting the key information of the intelligent calling calling user.

The method according to claim 11, wherein the step D further comprises: during a call between the calling user and the called user, the service switching point determines that the user of the smart call needs to interact with the user. The switching entity provides the cause value, and the switching entity interacts with the user according to the received reason value.

The method according to claim 27, wherein the cause value is carried in a call procedure CPG message or carried in a release REL message.

The method according to claim 27, wherein the method further comprises: if the user is a calling user, the service switching point provides a reason value to the switching entity where the called user is located, and the switching entity receives the The reason value interacts with the called user; if the user is the called user, the service switching point provides a reason value to the switching entity where the calling user is located, and the switching entity performs the reason with the calling user according to the received reason value. Interaction.