WO2007006219A1

WO2007006219A1 - A method for realizing multi-party call

Info

Publication number: WO2007006219A1
Application number: PCT/CN2006/001611
Authority: WO
Inventors: Feng Wang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2005-07-08
Filing date: 2006-07-07
Publication date: 2007-01-18
Also published as: CN1893677B; CN1893677A

Abstract

A method for realizing multi-party call, includes the steps of: the operation is transmitted to SSP from SCP (S201), the operation sets the additional number group and the synchronous ringing delay parameter and encodes the additional number group, in which the additional number group includes multiple additional called numbers used to indicate the destination address while the multi-party call is originated; the synchronous ringing delay parameter is used to indicate the calling sequence of the additional called numbers and the delay in the calling period when multi-party call is originated; after received the operation, the SSP originates the call to said multiple additional called numbers according to the calling sequence of the additional called numbers indicated by their synchronous ringing delay parameter and the delay in the calling period (S202). The present invention can realize multi-party call synchronously and enhance the calling ability of the INAP, and the change of the exit intelligent network is small, the service process is simple and easy to realize it.

Description

A method for realizing multiparty calling

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method for implementing a multiparty call. Background technique

The communication network such as Next Generation Network (NGN) and intelligent network is a network system that can provide new services quickly, economically and flexibly. The advantage is that the management of business, user data and the control of business logic are concentrated. Use the business on a larger scale. In order to complete the service, each functional entity of the communication network needs to exchange information flows, that is, according to corresponding communication application procedures, such as Intelligent Network Application Protocol (INAP), the information flow is transmitted between the network functional entities. In the INAP procedure, the relevant information flow is abstracted into operational or operational results.

In terms of intelligent networks, the International Telecommunication Union ITU-T has developed international standards for intelligent networks, such as: Phase 1, ITU-T Intelligent Network Application Capability Set CS1 (Capability Set 1) The research content of the standard is fixed intelligent network. Phase 2, ITU-T Intelligent Network Application Capability Set CS2 (Capability Set 2) standard mainly studies the inter-network interconnection of the intelligent network as well as the inter-network service, mobile service and multi-party call service. The application of CS-1 INAP is limited between SSP and SCP, between SCP and SDP and between SCP and IP (the corresponding signaling information, such as ISUP) is used between SSP and IP, and CS-2 is provided. The inter-network service, so its application scope is further expanded compared with CS-1, which increases the information exchange between SCP and SCP.

Typically, communication application procedures are used to define interface specifications between network service nodes. For example, the intelligent network application procedure (INAP), in which the CONNECT operation is a connection operation sent by a Service Control Point (SCP) to a Service Switching Point (SSP). In the intelligent network application procedure, especially in the intelligent network application procedure capability set CS1, is the first standardization stage of the intelligent network, wherein the capability set CS refers to a certain type of specific network capability in the intelligent network application procedure, such that A connection operation only contains a destination routing address. Therefore, the SSP can only initiate a call to a destination address when it receives a connection operation sent by the SCP, but cannot send multiple different destination addresses according to the SCP indication. At the same time initiate a call. In the intelligent network application procedure capability set CS2, in the second standardization phase of the intelligent network, multiple related operations can be used to implement the function of multi-party calling. However, this implementation requires both SCP and SSP to support the intelligent network application procedure capability set 2. The technical requirements for the entire intelligent network system networking are high, the call flow operation is complicated, and the service implementation is difficult.

Summary of the invention

It is an object of the present invention to provide a method for implementing a multi-party call. By extending the relevant communication application procedure, a call can be initiated simultaneously for a plurality of called numbers (destination routing addresses), and the business process is simple and easy to implement.

A method for implementing a multiparty call according to the present invention includes:

The service control point delivers the operation to the service switching point, and the operation is provided with an additional number group, where the additional number group includes a plurality of additional called numbers, which are used to indicate the address of g when the call is initiated; the service switching point receives the After the operation, a call is initiated to the plurality of additional called numbers. Preferably, the method further comprises:

The operation is further provided with a co-oscillation delay parameter, which is used to indicate a call sequence of an additional called number and an inter-call delay when simultaneously initiating a plurality of calls, and the service switching point is according to the same vibration. The delay parameter initiates a call to the plurality of additional called numbers.

Preferably, a plurality of additional called numbers in the additional number group are identified or encoded. Each of the plurality of additional called numbers includes all of its routing address information, and the entire routing address information includes the following parameters: number, numbering plan indication, internal network number indication, address property indication, parity indication, and parameter length and parameters necessary for encoding Code identification.

Preferably, the method further comprises: sequentially encoding the plurality of additional called numbers, and when the additional called number is a system-defined called party number structure type, encoding the address property indicator when encoding .

Preferably, the co-vibration delay parameter is matched with the non-response duration in the request to report the basic call state model event, to achieve simultaneous ringing, sequential ringing or delayed ringing.

When the inter-call delay indicated by the co-vibration delay parameter is less than the non-response duration, the service switching point initiates a call to all the additional called numbers in turn according to the inter-call delay indicated by the co-vibration delay parameter.

More suitably, the address property indicator in the application procedure is extended, in addition to multiple When the called number or the destination address is called, different call connection voice processing modes are adopted according to different address property indicators corresponding to each additional called number.

Preferably, the mask notification tone attribute address attribute indicator is set to mean that the calling party blocks the recording notification of the address full message sent by the called end office corresponding to the additional called number corresponding to the indicator.

Preferably, the CRBT attribute address property indicator is set to indicate that the ring tone ring platform plays the ring tone to the calling party, and the service switching point blocks the recording notification of the other attached called number.

When an address attribute indicator of one of the plurality of additional called numbers is attached to the called number is a color ring tone attribute address property indicator,

The additional called number corresponding to the non-color ring tone attribute address attribute indicator is routed to the called party; after receiving the first address full message sent back by the called party, the additional corresponding to the color ring tone attribute address indicator Call the number to the ring tones platform;

After the ring back tone platform returns the address full message, the address full message is forwarded to the forward office to play the ring tones for the calling party.

Preferably, a switch is set at the service switching point for controlling the processing of the additional called number. When the switch is turned on, the additional called number corresponding to the CRBT attribute address attribute indicator is performed according to the step. Processing; when the switch is turned off, the additional called number is not processed.

Preferably, a timer for monitoring the ringback address of the CRBT platform is set at the service switching point, and after the service switching point sends the initial address message to the CRBT platform, the address returned by the CRBT platform is received within the time defined by the timer. In the case of a message, the additional called number corresponding to the CRBT attribute address shield indicator is processed accordingly; otherwise, the corresponding processing is not performed.

Preferably, an extended address property indicator is set in the operation, the extended address property indicator being the original destination address indicator + extension, indicating that the service switching point directly connects the attached called number.

Preferably, the method further comprises:

The service switching point determines whether the address attribute indicator increases the extension language;

If the extension language is added, the service flag for preventing the repeated trigger is preset, and the extended address attribute indicator is subtracted from the extension language to restore the original address property indicator; otherwise, directly used The address nature indicator.

The step of determining whether the address attribute indicator increases the extension includes:

Setting a first range and a second range, if the address property indicator is within the first range, the address property indicator does not increase the extension;

If the address attribute indicator is within the second range, the address attribute indicator has been incremented.

In summary, the present invention can be applied to a communication network such as an intelligent network or a Next Generation Network (NGN) by extending a related communication application procedure to implement a multi-party call. Example ^, by extending the operations in the intelligent network application procedure (such as: CONNECT operation, ICA, Initiate Call Attempt operation, etc.), it is possible to initiate simultaneous calls to multiple parties on the basis of CS1, which greatly improves the call. The ability, and the changes to the existing network system are small, does not affect the original business process is simple and easy to implement;

By further expanding the operation in the communication application procedure, simultaneous ringing (synchronous service), sequential ringing (synchronous service), delayed ringing (expansion service), etc., when multiple parties simultaneously initiate a call are realized. Ringing mode

By further extending the operation in the communication application procedure, it is possible to use different call connection voice processing methods for different called numbers, such as a CRBT service, a masking notification tone, etc., and to access intelligent peripherals such as a ring back tone platform;

By further extending the operation in the communication application procedure, it is possible to prevent repeated triggering of the call.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a flow diagram of an extension of a CONNECT operation in accordance with the present invention;

2 is a flowchart of a method for implementing a multiparty call according to an embodiment of the present invention; FIG. 3 is a flowchart of processing of an SSP when there is a CRBT attribute address attribute indication in a CONNECT operation according to an embodiment of the present invention;

Fig. 4 is a flow chart showing the processing when the SSP receives the address attribute indicator in the embodiment of the present invention.

detailed description The present invention can be applied to a communication network such as an intelligent network or a Next Generation Network (NGN) by a method for implementing a multi-party call through a communication application procedure. For example, on the basis of the intelligent network application procedure capability set CS1, the operations in the intelligent network application procedure (such as the CONNECT operation) are extended, so that multiple destination routing addresses (or additional called numbers) can be carried simultaneously in one operation. ), to support multi-party simultaneous calls.

In order to make the principles, features and advantages of the present invention more apparent, the invention will be described in conjunction with the specific embodiments.

Referring to Fig. 1, the present invention will be described by taking the CONNECT operation in the intelligent network application procedure as an example.

The extension of the application procedure of the intelligent network is shown in Figure 1. The specific process includes:

Step S101, setting parameters in the CONNECT operation: an additional number group and a coherent delay. An example of its format and description is as follows:

CONNECT operation

Parameter

Sequence {

...... (original structure)

• Extension Item [10] Implied Sequence {

"Additional number [0] Implied sequence { A0

···Additional called number 1 [0] Implied sequence (1) octets (range (2..16)), ···Additional called number 2 [1] Implicit sequence (1) Octet (range (2..16)) option,

···Additional called number 3 [2] Implied sequence (1) octet (range (2..16)) option,

···Additional called number 4 [3] Implied sequence (1) octets (range (2..16)) selection

• "Additional called number n [n-1] Implied sequence (1) octets (range (2..16)) selection

}options, "Synchronous delay [1] Implied integer (0..1 ² 0) option

}options

...... (original structure)

}

· It should be noted that the names of the parameters set above, such as "additional number", "additional called number 1", "additional called number 2", "additional called number 3", "additional called number"

4" "Additional called number n,,, "same vibration delay", etc., are not limited to the names specified above, may be other names; the number of the parameters, such as "additional number" [0], "additional called [1] of number 1", [1] of "additional called number 2", [2] of "additional called number 3", [3] of "added called number 4" "added called number n" [nl], "synchronous delay" [1], etc., are not limited to the numbers indicated above, and may be other non-repeating numbers.

The additional number group is used to indicate the destination address when the call is initiated. The additional number group can be either a single number (or destination routing address), such as an additional number; or a combination of multiple numbers (or destination routing addresses), such as an additional number + an attached called number 1 + additional Call number 2 + Attached called number 3 + Attached called number 4 +... + Attached called number n, which is used to indicate multiple destination addresses when initiating a multiparty call. Each number is a sequence containing all routing address information of the number, and the total routing address information may include the following parameters: number, numbering plan indication, internal network number indication, address property indication, parity indication, and encoding necessary parameter length And parameter encoding identifiers and so on.

The coherent delay parameter is used to indicate the call sequence and inter-call delay of the attached called number (or destination routing address) when multiple calls are simultaneously initiated. This coherent delay parameter works equally for the same operation, such as all additional called numbers in the CONNECT operation. The coherent delay parameter is sent to the SSP under the control of the SCP, and the SSP can initiate a call according to the call sequence of the attached called number and the inter-call delay.

In addition, the present invention can report the same call state model to the same time delay parameter and request report.

(BCSM, Basic Call State Model) The non-response duration in the event cooperates to implement the simultaneous call, sequential call or delayed call function, that is, the co-vibration service, the parallel vibration service or the delay vibration service. Since the request ^ = report acknowledgment duration in the BCSM event can be applied to all additional called numbers, this feature of the coherent delay parameter can also be applied to all additional called numbers. On the code. Specifically, when the inter-call delay indicated by the co-vibration delay parameter is 0, the SSP simultaneously initiates a call to all called numbers, that is, simultaneous ringing (synchronous service); when the call with the same delay delay parameter indicates When the inter-delay and the non-response duration are the same, the SSP initiates a call to all the additional called numbers in the order of the call, that is, realizes the sequential ringing (synchronous service); when the inter-call delay indicated by the co-vibration delay parameter is less than no response During the duration, the SSP initiates a call to all the additional called numbers according to the inter-call delay indicated by the co-vibration delay parameter, that is, delay ringing (expansion service) is implemented.

Step S102: Encode the set parameter additional number group. If there is no additional called number in the additional number group, the entire "additional number" structure may not be encoded; if the additional number group includes a series of additional called numbers to which the call will be connected, the additional called number is encoded in order , the code can be started from the first attached called number until the nth additional called number. The encoding method can adopt the encoding method of the ordinary destination routing address, for example, a code. An example of its coding description is as follows:

The extension parameter is encoded as AA,

The additional number parameter is encoded as A0,

Additional called number 1 parameter is encoded as AO,

Additional called number 2 parameter coded as A1,

Additional called number 3 parameter coded as A2,

Additional called number 4 The parameter is encoded as A3.

The additional called number sent by the SCP to the SSP needs to be guaranteed to be a valid number, and if the attached called number belongs to the system-defined called party number structure type, the address nature indicator input by the service needs to be correctly encoded during encoding. For example, if the "called called end station recording notification function" is implemented by attaching the called number, the issued address attribute indicator should be filled in as 0x71H; the "color ring back tone function" needs to be implemented by attaching the called number. The delivered address attribute indicator should be filled in as 0x72H, otherwise the address attribute indicator is 0. In the above embodiment, the extension of the application procedure of the intelligent network is used to implement the multi-party call, the additional number group is set in the corresponding operation, such as the CONNECT operation, and the additional number group is encoded, wherein the additional number group includes a plurality of additional called numbers, Indicates the destination address when the call is initiated. Taking the co-vibration service as an example, the co-vibration service is a typical service applied to the attached called number. In this service, the SCP simultaneously delivers the called user number and its simultaneous ringing number in the CONNECT message. After receiving the message, the SSP receives the message. A call will be initiated to both numbers. At the same time, the additional number group encoding format in the CONNECT message of the ringing service is as follows:

Connect

{ Extended domain (ExtendField)

Additional number set identifier: AA

Parameter length: 0E

Additional number (ExtraDN)

Additional number set identifier: AO

Parameter length: 0C

Additional number 1 (ExtraCalledDNl)

Additional number 1 :A0

Parameter length: 0A

Destination Routing Address (DestinationRoutingAddress)

Eight-digit string identification :04

Parameter length: 08

Odd / even indicator code: address signal is even

Address property indicator code: 0

Internal network number indicator: Allow routing to internal network number Numbering plan indicator: ISDN number plan

Reserved :00

Number :xxxxxxxxxx

}

As another embodiment of the present invention, a multi-party implementation is implemented by extending an application procedure of an intelligent network, and the process thereof is as shown in FIG. 2,

Step 201, the SCP sends an extended CONNECT operation to the SSP, where The CO vIECT operation contains an additional number group and a coherent delay parameter with a number of additional called numbers (or destination routing addresses), and the additional number groups have been encoded.

Step 202: After receiving the CONNECT operation, the SSP initiates a call to a plurality of additional called numbers (or destination routing addresses) according to the calling sequence of the called number and the inter-call delay indicated by the same-mode delay parameter.

In addition, the present invention may also extend the address property indicator on the basis of the address property indicator in the intelligent network application procedure, so that when calling a plurality of additional called numbers (or destination routing addresses) Different call connection voice processing modes may be adopted according to different address property indicators corresponding to each additional called number, and the call connects voices, such as various ring back tones. An example of the extension of the address property indicator is as follows:

(1) 0x71H: Masking the notification tone attribute address attribute indicator, which is used to indicate to the calling party to block the address end message (ACM, Address Complete Message) of the called end office corresponding to the additional called number corresponding to the indication. Recording notice.

(2) 0x72H: The CRBT attribute address nature indicator is used to indicate that the ring back tone platform plays the ring tones to the calling party. At the same time, the SSP needs to block the recording notification of other attached called numbers. The priority of this attribute is higher than the attribute of 0x71H.

When there is a CRBT attribute address attribute indicator in the CONNECT operation, if the address attribute indicator of one of the plurality of additional called numbers carried in the operation is 0x72H (indicating that the additional called number is a ring tones number, it is required When this number is sent to the intelligent peripheral IP, ie the ring back tone platform, as shown in Figure 3, the corresponding processing of the SSP is as follows:

Step 301: First, the SSP routes the called party to the called party by using the additional called number (non-color ring number) corresponding to the non-color ringing attribute address attribute indicator.

After receiving the first ACM sent back by the called party (the non-hull ring number is processed in the same way, whether it is the same or the same), in step 302, the ACM is not sent to the forward station, but is corresponding to the color tone attribute address indication. The attached called number (color ring number) is routed to the ring back tone platform.

Step 303: After the ring back tone platform sends back the ACM, the SSP forwards the ACM to the office, and gives the calling party a ring tone.

In addition, the SSP can set a switch, when the switch is turned on, according to the above process; when the switch is turned off, the additional called number (color ring number) corresponding to the color ring tone attribute address property indicator It is not processed, but is handled in the case of only other additional called numbers. Alternatively, the SSP sets an independent timer for monitoring the ring back tone of the ring back tone platform. When the SSP sends an initial address message (IAM, Initial Address Message) to the ring back tone platform, if the ACM is not received within the time defined by the timer, The additional called number (color ring number) corresponding to the CRBT attribute address attribute indicator is processed, but is processed according to only other attached called numbers; otherwise, it is processed according to the above process.

(3) Extension of address property plus 0x09: Address property indicator with extended address property, used to prevent repeated triggering of service calls. When the service is delivered (such as CONNECT operation), it is added on the basis of the original destination address nature indicator. The extension 0x09 indicates that the SSP connection directly connects to the called number, and no longer triggers the intelligent service. The range of the address property can be specified as follows: If the destination address property indicator is in the first range of 0 ~ 8, 0x70 ~ 0x77, it means that there is no base value 0x09; if the destination address property indicator is 0x09 - 0x11, 0x79 - 0x80 Within the second range, it means that the base value 0x09 is added. As shown in FIG. 4, when the SSP receives the address attribute indicator, it first determines whether the address attribute indicator increases the extension.

Step S401, determining whether the address attribute indicator is within the first range, and if it is within the first range, determining that the address attribute indicator does not add an extension, proceeding to step S404, directly using the address attribute indicator; otherwise, performing steps S402. Determine whether the address attribute indicator is in the second range. If the address attribute indicator is in the second range, determine that the address attribute indicator adds a language, and proceed to step S403 to prevent repeated triggering. The service flag, the address property indicator extended by the address property is subtracted from the extension, and the original address property indicator is restored. Otherwise, step S404 is performed, and the address property indicator is directly used.

All of the above numbers are a specific example description and are not meant to limit the use of only the above numbers. In actual use, any number including any address nature indicator that does not conflict with an existing intelligent network application procedure may be used.

When the SSP receives multiple CONNECTed Called Numbers in the CONNECT operation sent by the SCP, the SSP processes the signaling sent back to the office and the BCSM events with multiple attached called numbers, regardless of whether there is a coherent delay parameter. as follows:

Processing of signaling sent back to the office: If the SSP receives the first address full message sent back to the office, it sends an address full message to the forward station, and attaches the called number according to the CONNECT operation. Whether the address attribute indicator is a masked notification tone attribute address attribute indicator determines whether to mask the recording notification and sends a ringback tone, and other unsuccessful signaling is discarded and not processed; if the address full message signal is not received, the last will be The unsuccessful signaling is reported to the service control point through the basic call state model event.

Handling of BCSM events for multiple attached called numbers:

If the SSP receives the first address full message sent back to the office, it initiates a request to report the monitoring of the non-response duration in the BCSM event. If no response message is received when the non-response duration is reached, the service control point reports no. The BCSM event that is answered; if the CAUSE that failed the call is received when the non-response time is reached, the basic call state model event of the route failure is reported to the service control point.

As described above, the CONNECT operation of the intelligent network application procedure is taken as an example, and the method provided by the present invention is described by extending the intelligent network application procedure. As shown by those skilled in the art, these extensions are not limited to the CONNECT operation. It can also be used in other operations of the intelligent network (for example, starting an attempted call (ICA) operation, etc.). In addition, the extension of the application procedure of the intelligent network in the present invention may adopt other manners in the form of parameters, and is not limited to the manner enumerated in the above embodiments.

The above embodiments are intended to illustrate and explain the principles of the invention. It is to be understood that the specific embodiments of the present invention are not limited thereto. Various changes and modifications may be made without departing from the spirit and scope of the invention. Accordingly, the scope of the invention is defined by the claims.

Claims

Rights request

A method for implementing a multiparty call, comprising:

The service control point sends an operation to the service switching point, where the operation is provided with an additional number group, wherein the additional number group includes a plurality of additional called numbers, which are used to indicate a destination address when the call is initiated; the service switching point receives the operation Thereafter, a call is initiated to the plurality of additional called numbers.

2. The method according to claim 1, wherein the method further comprises: the operation further comprising setting a co-oscillation delay parameter, the co-vibration delay parameter being used to indicate an additional being when a plurality of calls are simultaneously initiated. Calling sequence of the number and inter-call delay, the service switching point initiates a call to the plurality of additional called numbers according to the same-synchronization delay parameter.

The method according to claim 1 or 2, further comprising:

A plurality of additional called numbers in the additional number group are identified or encoded.

The method according to claim 1 or 2, wherein each of the plurality of additional called numbers includes all routing address information, and the total routing address information includes the following parameters: number, numbering plan indication, intranet The number indication, the address property indication, the parity indication, and the necessary parameter length and parameter coding identifier for the encoding.

The method according to claim 1 or 2, wherein the method further comprises: sequentially encoding the plurality of additional called numbers, and when the additional called number is a system-defined called party number Structure type, encoding the address property indicator when encoding.

The method according to claim 1 or 2, further comprising: matching the same-oscillation delay parameter with a non-response duration in the request to report a basic call state model event, to achieve simultaneous ringing and sequential vibration Ringing or delaying ringing,

The method according to claim 1 or 2, further comprising: expanding an address attribute indicator in a corresponding application procedure, when calling a plurality of additional called numbers or destination addresses, according to each The different address property indicators corresponding to the attached called numbers use different call connection voice processing methods.

8. The method according to claim 7, further comprising: The mask notification tone attribute address attribute indicator is set to indicate that the calling party blocks the recording notification of the address full message sent by the called end office corresponding to the additional called number corresponding to the indicator.

The method according to claim 7, further comprising: setting a color ring tone attribute address property indicator, indicating that the ring tone ring platform plays the ring tone tone to the calling party, and the service switching point shields the recording of the other attached called number Notice.

10. The method according to claim 8, further comprising: when one of the plurality of additional called numbers attaches an address property indicator of the called number to be a color ring tone attribute address property indicator,

The method according to claim 10, further comprising: setting a switch at the service switching point, configured to control processing of the additional called number, when the switch is turned on, according to the step The additional called number corresponding to the CRBT attribute address attribute indicator is processed; when the switch is disconnected, the additional called number is not processed.

The method according to claim 10, further comprising: setting, at the service switching point, a timer for monitoring a ringback platform full address of the ring back tone platform, after the service switching point sends the initial address message to the ring back tone platform, When receiving the address full message sent back by the CRBT platform within the time defined by the timer, the additional called number corresponding to the CRBT attribute address attribute indicator is processed accordingly; otherwise, no corresponding processing is performed.

13. The method according to claim 1 or 2, further comprising: setting an extended address property indicator in the operation, the extended address property indicator being an original destination property indicator + extension , instruct the service switching point to connect directly to the called number.

14. The method according to claim 13, further comprising: said service switching point

Determining whether the address attribute indicator increases the extension language; If the extension language is added, the service flag for preventing repeated triggering is preset, and the extended address property indicator is subtracted from the extension language to restore the original address property indicator; otherwise, the address property indicator is directly used.

The method according to claim 14, wherein the step of determining whether the address attribute indicator increases the extension includes:

If the address wide indicator is in the second range, the address attribute indicator has been added with the extension.