CN101166105A - Online user invitation method for conference service - Google Patents

Abstract

The online user invitation method for conference services according to the present invention includes the following steps: Step S302, in the process of establishing a session between the first user equipment and the second user equipment, the first user equipment obtains the first user equipment and the first user equipment from the transmitted message When the second user equipment conducts a session, it transmits the routing set of the signaling and records the routing set; step S304, the first user equipment sends a request message to the second user equipment to the conference service service equipment with a new session identifier to request the second user equipment to join In the conference, if the route set is not empty, the first user equipment adds the recorded route set to the route set of the request message; step S306, the conference service device establishes a session connection with the second user equipment. The method of the present invention solves the problem in the prior art that the contact address is not modified when there is a B2BUA, which eventually leads to the failure of the replacement and the failure to invite successfully.

Description

Online user invitation method for conference service

technical field

The invention relates to the communication field, in particular to an online user invitation method for conference services.

Background technique

IP (Internet Protocol, referred to as IP) multimedia subsystem (IP Multimedia Core Network Subsystem, referred to as IMS) is an IP-based network proposed by the 3rd Generation Partnership Project (3GPP). Architecture, builds an open and flexible business environment, supports multimedia applications, and can provide users with rich multimedia services.

In the IMS service system, the control layer and the service layer are separated, and the control layer does not provide specific services, but only provides necessary functions such as triggering, routing, and charging to the service layer. The service triggering and control function in the control layer is the call session control function (Call Session Control Function, referred to as CSCF, which is divided into three types: Proxy, query Interrogating and Serving, among which Serving is mainly responsible, and the Interrogating type is optional) Completed, the business layer is composed of a series of application servers (Application Server, AS for short), which can provide specific business services, and the AS can be an independent entity or exist in the S-CSCF. The control layer (S-CSCF) controls service triggering according to the user's subscription information, invokes services on the AS, and realizes service functions. The AS and the S-CSCF may be collectively referred to as Server Equipment (SE, Server Equipment). There is another entity called back-to-back user agent (B2BUA). When it receives a session request, it will act as a proxy to initiate a new request to the destination party, so that there are multiple session identifiers on the signaling path. In order to ensure that subsequent requests can still Through it, it will modify the contact address in the message or add the required route to the message. The end-to-end device in the session is called user equipment UE (UserEquipment), which is responsible for the interaction with the user. These functional entities communicate using the SIP (SessionInitiation Protocol) protocol.

The conference service is a service in the IMS, which allows multiple people to talk at the same time, that is, when one person speaks, others can hear it.

Figure 1 is a flow chart of an existing conference service inviting an online user message, which describes the process in which UE-A is talking with UE-B, and then UE-A creates a conference and invites UE-B to join. The steps are as follows:

Step S102, UE-A and UE-B have established a session connection, and there is no B2BUA on the signaling path of the session, so there is only one session identifier on the session signaling path.

Step S104, UE-A calls the conference service equipment SE to request to create a conference, such as sending an INVITE (invitation) message.

In step S106, the SE receives the call and creates a conference.

Step S108, SE successfully creates the conference, answers the call to UE-A, indicates that the conference is successfully created, and returns the conference identifier, such as responding to a "200 OK" message, setting the conference address in the Contact (contact) field and bringing "isfocus" mark.

Step S110, since then, a media connection is established between UE-A and SE.

Step S112, UE-A sends a request to SE to invite UE-B to join the conference, and requests to replace the session between AB, so as to prevent UE-B from returning a busy message and causing the invitation to fail, such as sending a REFER (transfer) message, in the Refer- The address of UE-B is specified in the To (transferred to) field, and the session identification to be replaced is carried with the "Replaces" parameter.

Step S114, SE receives the request, agrees, and responds with a "202 Accepted" message.

Step S116, SE invites UE-B according to UE-A's request, for example, sends an INVITE message to UE-B, and specifies the session identifier to be replaced in the Replaces (replacement) field.

Step S118, UE-B receives the INVITE message, because it carries the Replaces field, it does not return a busy message, but replaces the session specified in the Replaces field according to the instruction, and answers the call after the replacement is successful, for example, returns a "200OK" message.

In step S120, a media connection is established between UE-B and SE, and through the bridging of SE, UE-A and UE-B can conduct a conference call.

The existing methods of inviting online users for conference services can only be successful when there is no B2BUA on the signaling path of the session to be replaced. There are at least two session IDs, and the UE-A side is definitely different from the UE-B side, so UE-B will not recognize the replacement session ID carried in the received INVITE message, because the session ID is provided by UE-A, As a result, the replacement failed and the invitation could not be successful.

Figure 2 is a schematic diagram of an existing conference service invitation online user, and describes the situation where the invitation fails when there is a B2BUA between the AB sessions and the contact address has not been modified. The steps are as follows:

In step S202, a session is established between UE-A and UE-B, and B2BUA exists in the signaling path, wherein the session identifier between UE-A and B2BUA is D1.

In step S204, the session ID between the B2BUA and UE-B is D2.

In step S206, after UE-A requests the conference service server SE to establish a conference, UE-A requests SE to invite UE-B to join, and replaces the existing session D1.

Step S208, SE invites UE-B to join the conference, and replaces its original session D1.

Since then, UE-B performs the operation of replacing the D1 session after receiving the invitation, but there is no D1 session, the replacement cannot be completed, and the invitation fails.

Contents of the invention

In view of one or more of the above-mentioned problems, the present invention proposes a method for inviting online users for conference services, which can solve the problem that the contact address cannot be successfully invited due to the replacement failure caused by the B2BUA existing in the prior art. question.

The online user invitation method for conference services according to the present invention includes the following steps: Step S302, in the process of establishing a session between the first user equipment and the second user equipment, the first user equipment acquires the first user equipment and the first user equipment from the transmitted message When the second user equipment conducts a session, it transmits the routing set of signaling and records the routing set; step S304, the first user equipment sends a request message to the second user equipment to the conference service service equipment with a new session identifier to request the second user equipment to join In the conference, if the route set is not empty, the first user equipment adds the recorded route set to the route set of the request message; step S306, the conference service device establishes a session connection with the second user equipment.

Wherein, the process of the session between the first user equipment and the second user equipment includes at least one of the following: the first user equipment calls the second user equipment to establish a session, and the second user equipment calls the first user equipment to establish a session. The request message includes an invitation destination address, and the invitation destination address includes a user identification part and a parameter part.

In step S302, the route set is carried by the record route field.

In step S304, the request message is a transfer message, and the routing set of the request message is carried in the routing field.

In step S306, the IMS device through which the request message passes adopts a standard third-party session control technology to establish a session connection between the conference service device and the second user equipment. The request message passes through the back-to-back user agent entity, and the back-to-back user agent entity modifies the replacement session identifier in the parameter part of the invitation destination address in the request message, and forwards the modified request message to establish a connection between the conference service device and the second user device. Session connection between. The request message passes through the back-to-back user agent entity, and the back-to-back user agent entity modifies the entire invitation destination address in the request message to the special address of the back-to-back user agent entity itself, and forwards the modified request message to establish a conference service service device and the first A session connection between two user devices. The request message passes through the back-to-back user agent entity, and the back-to-back user agent entity modifies the user identification part of the invitation destination address of the request message to the contact address of the back-to-back user agent entity itself, and forwards the modified request message to establish a conference service device A session connection with a second user device.

The method of the present invention solves the problem in the prior art that the contact address is not modified when there is a B2BUA, which eventually leads to the failure of the replacement and the failure to invite successfully.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is the flow chart of the message that the existing conference service invites the online user;

FIG. 2 is a schematic diagram of an existing conference service invitation online user;

Fig. 3 is the flow chart of the online user invitation method for conference business according to the present invention;

Fig. 4 is the outline figure (modification replacement conversation) according to the conference service invitation online user of the present invention;

Fig. 5 is a flow chart (modify and replace session) according to the message of conference service invitation online user of the present invention;

Fig. 6 is the outline figure (non-modification replacement session) of online user invited according to the conference service of the present invention;

Fig. 7 is the flow chart (non-modification replacement session) of the message that the meeting service invites online user according to the present invention;

Fig. 8 is the summary figure (3PCC mode) that invites online user according to conference service of the present invention; And

Fig. 9 is a flow chart (3PCC mode) of a conference service invitation message of an online user according to the present invention.

Detailed ways

The specific implementation manners of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 3 is a flow chart of the online user invitation method for conference service according to the present invention. As shown in Figure 3, the method mainly includes the following steps:

S302. During the process of establishing a session between user equipment A and user equipment B, if user equipment A obtains a routing set required for signaling transmission of the session through a message, remember the set.

S304, after the user equipment A establishes the conference, send a request message to the conference business service equipment with the new session identifier, requesting it to invite the other party to join the conference, if the route set recorded in step S302 is not empty, then the user equipment A adds the route set to in the routes collection for this request message.

S306. The network realizes the session connection between the final invited user and the conference service device.

Wherein, the session between user equipment A and user equipment B in step S302 may be established by user equipment A calling user equipment B, or may be established by user equipment B calling user equipment A.

The required route set in step S302 is carried by the Record-Route field.

The request message in step S304 is a transfer (REFER) message, and the routing set of the message is carried in the Route field.

In step S306, the network can realize the session connection between the invited user and the conference service device through one or a combination of the following methods:

1. The IMS device through which the request message passes adopts the standard Third Party Call Control (3PCC for short) technology to establish a session connection between the conference service server and the invited user;

2. The request message passes through the B2BUA, and the B2BUA modifies the replacement session identifier in the parameter part of the invitation destination address, that is, the value of the Replaces parameter in the Refer-To field, and then forwards the message.

3. The request message passes through B2BUA, and B2BUA modifies the entire invitation destination address to B2BUA's own special address, that is, the value of the entire Refer-To field. Through this address, the session ID to be replaced can be found, and then the message is forwarded.

4. After the request message passes through B2BUA, B2BUA modifies the user identification part of the invitation destination address to B2BUA's own contact address, that is, the user identification part in the Refer-To field, and the parameter part remains unchanged, and then forwards the message.

Fig. 4 is the outline diagram (modification and replacement session) of the online user invited by the conference service of the present invention, describing that when there is a B2BUA between the AB sessions, the request message for inviting the online user needs to pass through the B2BUA under the routing requirements, so that the B2BUA can be revised Replace the session ID to realize the successful addition of conference members. The steps are as follows:

In step S402, a session is established between UE-A and UE-B, B2BUA exists in the signaling path, and the session identifier between UE-A and B2BUA is D1.

In step S404, the session ID between the B2BUA and UE-B is D2.

Step S406, after UE-A requests the conference service server SE to establish a conference, UE-A requests SE to invite UE-B to join, and replaces the existing session D1, because the route to B2BUA is added, the message passes through B2BUA.

In step S408, the B2BUA revises the replacement session identifier in the request, changes the session identifier D1 to D2, and then forwards the message.

Step S410, SE invites UE-B to join the conference, and replaces its original session D2.

Since then, UE-B performs an operation of replacing the D2 session after receiving the invitation, and the replacement is successful, thus the invitation is successful.

Fig. 5 is the flow chart of the message of meeting service invitation online user of the present invention (modification replacement session), has described UE-A and UE-B ongoing conversation or UE-A is waiting for UE-B to answer the call, this session signaling The path passes through B2BUA, and B2BUA adds the required routing information, so that the subsequent request of the session must pass through B2BUA, and then UE-A creates a conference and invites UE-B to join the conference. The steps are as follows:

Step S502, UE-A and UE-B have established a session connection, or UE-A is waiting for UE-B to answer the call, and there is B2BUA on the signaling path of the session, the session is divided into two sections, UE-A and B2BUA The session identifier between B2BUA and UE-B is D1, and the session identifier between B2BUA and UE-B is D2, and in order to make subsequent requests in this session process go through this B2BUA, B2BUA adds the required route in the message, requiring this B2BUA, for example In the Record-Route field of the message.

In step S504, UE-A calls the conference service equipment SE with the new session ID, and requests to create a conference, such as sending an INVITE (invitation) message.

In step S506, the SE receives the call and creates a conference.

Step S508, SE successfully creates the conference, answers the call to UE-A, indicates that the conference is successfully created, and returns the conference identifier, such as responding to a "200OK" message, setting the conference address in the Contact (contact) field and carrying the "isfocus" mark .

Step S510, since then, a media connection is established between UE-A and SE.

Step S512, UE-A sends a request to SE to invite UE-B to join the conference, and requests to replace the D1 session, so as to prevent UE-B from returning a busy message and causing the invitation to fail, such as sending a REFER (transfer) message, in the Refer-To( Indicate the address of UE-B in the transfer to) field, and use the "Replaces" parameter to bring the session identifier to be replaced, and add the routing set required by the original AB session to the routing set, so that B2BUA is in the routing set, For example, add a route collection in the Route domain.

Step S514, since the B2BUA is in the routing set, the request message passes through the B2BUA, and the B2BUA modifies the replacement session ID to D2, and forwards it.

Step S516, SE receives the request, agrees, and responds with a "202 Accepted" message.

Step S518, the response message is transmitted to the B2BUA along the reverse path of the request, and the B2BUA forwards the message to UE-A.

Step S520, SE invites UE-B according to the requirements of UE-A, for example, sends an INVITE message to UE-B, and requests to replace the session whose session ID is D2, for example, indicates the session ID to be replaced in the Replaces (replacement) field.

Step S522, UE-B receives the invitation message, because it carries the replacement session identifier, it does not return a busy message, but replaces the specified session according to the instructions, and answers the call after the replacement is successful, such as returning a "200 OK" message.

In step S524, a media connection is established between UE-B and SE, and through the bridging of SE, UE-A and UE-B can conduct a conference call.

Fig. 6 is the outline diagram (non-modified and replaced session) of the online user invited by the conference service of the present invention, and describes that when there is a B2BUA between the AB sessions, the request message for inviting the online user needs to pass through the B2BUA under routing requirements, thereby enabling the B2BUA To revise the invitation destination address to achieve the successful addition of conference members, the steps are as follows:

Step S602 to step S604 are the same as step S402 to step S406 in FIG. 4 .

Step S608, B2BUA revises the invitation destination address in the request, changes the inviter to B2BUA, and then forwards the message. If the entire invitation destination address is modified as a special address of B2BUA, the replacement session ID will not be carried. If only the invitation is modified If the user identification part of the destination address is the contact address of the B2BUA, it still carries the replacement session identification D1.

In step S610, since the invitation destination address is changed to B2BUA, SE invites B2BUA to join the conference. If the replacement session ID is carried in step S608, the invitation message also carries the replacement session ID D1, otherwise, the replacement session ID is not included.

Step S612, if the destination address of the message received by the B2BUA is a special address, and the message does not carry a replacement session ID, then find the corresponding real invited party's session ID D2 according to this address, if the received message has a replacement session ID D1, Then find the corresponding session identifier D2, and then use the re-INVITE technology on the D2 session to make UE-B establish a session connection with SE.

Fig. 7 is the flow chart (non-modification replacement session) of the message that the meeting business invites online user of the present invention, has described UE-A and UE-B ongoing conversation or UE-A is waiting for UE-B to answer the call, this session message Let the path go through B2BUA, B2BUA adds the required routing information, so that the subsequent request of the session will go through B2BUA, and then UE-A creates a conference and invites UE-B to join the conference. The steps are as follows:

Step S702 to step S712 are the same as step S502 to step S512 in FIG. 5 .

Step S714, since B2BUA is in the routing set, the request message passes through B2BUA, and B2BUA changes the entire invitation destination address to a special address, making it point to itself, so that the message does not have a replacement session identifier, such as modifying the value of the entire Refr-To field , and then forward the message, or B2BUA modifies the user identification part of the invitation destination address to its own contact address, and the parameter part remains unchanged, so that the message replaces the session identification D1, such as only modifying the user identification part of the value of the Refer-To field It is the Contact address of B2BUA, and then forward the message.

Step S716 to step S718 are the same as step S516 to step S518 in FIG. 5 .

Step S720, SE calls B2BUA according to the invitation target address in step S714, such as sending an INVITE message to B2BUA, if there is a replacement session identifier in step S714, the message carries a replacement session identifier D1, such as indicated in the Replaces (replacement) field The session ID to replace.

Step S722, B2BUA receives the call message, if the invitation target address is a special address, find the corresponding session ID D2 through this address, if the invitation address is not a special address, then find the corresponding session ID D2 by replacing the session ID D1, B2BUA in Call UE-B again on the D2 session, for example, send a re-INVITE request to UE-B.

In step S724, UE-B receives the call message and responds to the call, such as a "200 OK" message.

Step S726, the response message passes through the B2BUA, and the B2BUA forwards the response message to the SE.

In step S728, a media connection is established between UE-B and SE, and through the bridging of SE, UE-A and UE-B can conduct a conference call.

Fig. 8 is the summary diagram (3PCC mode) of online user invited by conference business of the present invention, has described when there is B2BUA between AB conversation, when the request message of inviting online user passes through the IMS equipment on AB conversation signaling path (take B2BUA as Example), the device uses 3PCC technology to realize the session connection between the conference service device and the invited user, and the steps are as follows:

Step S802 to step S804 are the same as step S402 to step S404 in FIG. 4 .

Step S806, after UE-A requests the conference service server SE to establish a conference, UE-A requests SE to invite UE-B to join, and replaces the existing session D1, according to the route set, the message passes through an IMS device on the AB session signaling path , such as B2BUA.

In step S808, the B2BUA calls the conference service service device.

In step S810, the conference service equipment answers the call.

In step S812, the B2BUA uses the re-INVITE technology to re-call UE-B on the AB session path, and finally connects the conference service device and UE-B to realize the session connection between them.

The IMS device used in this figure takes B2BUA as an example, but it can be other IMS devices, such as AS or S-CSCF.

Fig. 9 is the flow chart (3PCC mode) of the message of conference service invitation online user of the present invention, has described UE-A and UE-B ongoing conversation or UE-A is waiting for UE-B to answer call, this session signaling path After B2BUA, UE-A creates a conference and invites UE-B to join the conference. The IMS device on the AB session signaling path (take B2BUA as an example) uses the standard 3PCC technology to establish a session connection between the conference service device and the invited user process, the steps are as follows:

Step S902 to step S912 are the same as step S502 to step S512 in FIG. 5 .

Step S914, since the B2BUA is in the routing set, the request message passes through the B2BUA, and the B2BUA proxy conference service server agrees to the UE-A's request, such as responding to a "202 Accepted" message.

In step S916, the B2BUA calls the conference service service equipment SE, such as sending an INVITE message.

In step S918, the SE answers the call, such as a "200 OK" message.

In step S920, the B2BUA then uses the re-INVITE technology to call UE-B on the D2 session, for example, sending a re-INVITE message.

In step S922, UE-B receives the call message, and responds to the call, for example, responds to a "200 OK" message.

In step S924, the B2BUA realizes the connection of the two sessions, so that a media connection is established between UE-B and SE, and through the bridging of SE, UE-A and UE-B can conduct a conference call.

The IMS device used in this figure takes B2BUA as an example, but it can be other IMS devices, such as AS or S-CSCF.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. An online user invitation method for conference services, characterized in that, comprising the following steps: Step S302, in the process of establishing a session between the first user equipment and the second user equipment, the first user equipment obtains from the transmitted message the a routing set and record the routing set; Step S304, the first user equipment sends a request message to the second user equipment to the conference service service equipment using the new session identifier to request the second user equipment to join the conference, if the route set is not empty , the first user equipment adds the recorded route set to the route set of the request message; Step S306, the conference service device establishes a session connection with the second user equipment. 2. The method for inviting online users according to claim 1, wherein the process of having a conversation between the first user equipment and the second user equipment includes at least one of the following: the first user equipment calls the A second user equipment to establish a session, the second user equipment calls the first user equipment to establish a session. 3. The online user invitation method according to claim 2, wherein the request message includes an invitation destination address, and the invitation destination address includes a user identification part and a parameter part. 4 . The online user invitation method according to claim 3 , wherein, in the step S302 , the route set is carried in a record route field. 5 . The online user invitation method according to claim 4 , wherein, in the step S304 , the request message is a transfer message, and the routing set of the request message is carried in a routing field. 6. The online user invitation method according to any one of claims 1 to 5, characterized in that, in the step S306, the IMS device passing through the request message adopts a standard third-party session control technology to establish the session connection between the conference service service device and the second user equipment. 7. The online user invitation method according to any one of claims 1 to 5, characterized in that, in the step S306, the request message passes through a back-to-back user agent entity, and the back-to-back user agent entity modifies the The request message replaces the session identifier of the parameter part of the invitation destination address, and forwards the modified request message, so as to establish a session connection between the conference service device and the second user equipment. 8. The online user invitation method according to any one of claims 1 to 5, characterized in that, in the step S306, the request message passes through the back-to-back user agent entity, and the back-to-back user agent entity will The entire invitation destination address in the request message is modified to the special address of the back-to-back user agent entity itself, and the modified request message is forwarded to establish a connection between the conference service device and the second user device. session connection. 9. The online user invitation method according to any one of claims 1 to 5, characterized in that, in the step S306, the request message passes through the back-to-back user agent entity, and the back-to-back user agent entity will Modifying the user identification part of the invitation destination address of the request message to the contact address of the back-to-back user agent entity itself, and forwarding the modified request message, so as to establish a relationship between the conference service device and the second user device Session connection between.

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