CN1635765A - A SIP network structure and method for implementing SIP group call - Google Patents
A SIP network structure and method for implementing SIP group call Download PDFInfo
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Abstract
This invention refers to a SIP network structure and the method for realizing SIP grouping calling, which contains a communication terminal connecting with SIP Proxy through IP network, grouping control module receiving SIP Proxy transmitted terminal information and analyzing the grouping information carried by said terminal information, the communication terminal conversation establishment is completed by controlling SIP Proxy according to said grouping information. Said invention provides a simple method for SIP calling communication terminal that only using one message to start grouping conversation. Said invention also provides grouping management function of SIP grouping calling which contains authorized user can add or delete user, or release whole grouping conversation and calling preservation function for all grouping conversation.
Description
Technical field
The present invention relates to the communications field, relate in particular to the method that a kind of session is set up agreement (SIP) network configuration and realized the SIP group call.
Background technology
Agreement (SIP, Session Initiation Protocol), the basic signaling the Internet era of being are set up in session.SIP designs for making a phone call on the internet at first, and SIP has surmounted the category of making a phone call far away at present, is used in and supports various new business on the IP network.3GPP organizes the basic signaling that SIP is decided to be following 3G communication.SIP is a kind of agreement very flexibly, so the SIP application is little of telephone terminal, arrives exchanging network system greatly.For guaranteeing the flexibility of SIP, basic SIP is fairly simple.Session Initiation Protocol is being set up aspect the cluster conversation, needs the caller communication terminal to invite called communication terminal to add session one by one.Though so relatively flexibly, also relatively waste Internet resources, session is also long settling time.
As shown in Figure 1, be a schematic SIP network structure, user terminals all among the figure link to each other with SIP Proxy by IP network.User's terminal is to support the terminal of SIP, can be mobile phone, also can be landline telephone.
Suppose that user A will initiate and B, C, the group call of D, if the standard of use Session Initiation Protocol, flow process must may further comprise the steps as shown in Figure 2:
1. user A gives B, and C, D send out INVITE respectively;
2.SIP Proxy transmits INIVITE message and gives the targeted customer;
3. the targeted customer returns 200OK message and gives SIP Proxy;
4.SIP Proxy transmits 200OK and gives user A;
5. user A returns ACK message and gives each user.Message at first arrives SIP Proxy;
6.SIP Proxy transmits ACK message and gives the targeted customer.
In fact be exactly calling subscriber A and all called standard SIP point to point call flow processs of calling out point to point call of setting up respectively.Standard SIP can be referring to RFC3261.
Standard SIP can realize the conversation between a plurality of users, but if any following shortcoming:
1, the user will set up a calling, sends out Invite message respectively must for each called communication terminal, relatively wastes resource and time;
Unless 2 called communication terminals initiatively leave, the group call promoter is difficult to allow the user leave and does not end session;
3, called communication terminal is difficult to call out maintenance and recovers;
4, group management function is difficult to realize.Standard SIP does not have the setting and the management of group member authority, dynamically adjusts the adding of group member and withdraws from difficult the realization;
5, can not allow the whole group call of the disposable release of user of authority.All users are equality, can only oneself withdraw from group, can't exercise the management function that discharges whole cluster conversation;
6, the function of management correspondent medium a little less than.If user media interrupts, related resource can not initiatively be found and discharge to network as early as possible.
Summary of the invention
The objective of the invention is to propose a kind of new SIP network, and use the group call service that this network is finished.
For this reason, the present invention adopts following scheme:
Agreement (SIP) network configuration is set up in a kind of session, and adopting Session Initiation Protocol is signaling communication, comprises the communication terminal that is connected with SIP Proxy by IP network, the foundation of conversing between described SIP Proxy control communication terminal; It is characterized in that described network also comprises group's control module, described group control module receives SIPProxy and transmits the end message that comes and parse the group information that carries in this end message, finishes the foundation of communication terminal conversation according to this group information control SIP Proxy.
Described group control module comprises Session Initiation Protocol stack module, SIP expansion parsing adaptation module, group management module and Call Control Block;
The mutual SIP extended message of described Session Initiation Protocol stack module and SIP Proxy resolves to the sip message of standard with it;
Described SIP expansion adaptation module is connected with Session Initiation Protocol stack module and Call Control Block, the SIP expansion of assembling or explanation SIP extended message;
Described Call Control Block is mutual according to SIP standard information and extend information and group management module, the sip message of generation standard and expansion, and the foundation of control group call is revised and is discharged;
Described group management module is extracted the static group information in the database, and the user's current information according to call management module transmits administers and maintains the multidate information of group and group user, and provides multidate information to use for Call Control Block.
A kind of method that realizes the SIP group call is applicable to that being controlled communication terminal and adopted Session Initiation Protocol by SIP Proxy is the network of signaling communication, and the foundation by conversing between SIP Proxy and group's control module control communication terminal is characterized in that may further comprise the steps:
A, caller communication terminal are provided with group member, and send INVITE to called communication terminal, in the SIP of this INVITE expansion, comprise the group information of caller communication terminal setting and the media information of caller communication terminal;
B, SIP Proxy are transmitted to group's control module with this INVITE and resolve;
C, group's control module are according to analysis result, for the caller communication terminal is set up media context;
D. group's control module send INVITE, this message to comprise group information and media information that group's controller is provided with for called communication terminal forwarding by SIP Proxy;
After e, called communication terminal receive above-mentioned message, send the 200OK order for group's control module, wherein comprise the media information that called communication terminal is provided with by SIP Proxy;
F, group's control module send the ACK order for called communication terminal by SIP Proxy after called communication terminal is added media context, notify called;
G, synchronously repeating step d is to f, being called in the group of invitation arbitrary number.
Group information in the described SIP expansion comprises one or more combination of following content:
Group identification, group member tabulation, member condition, member type, member's authority, the owner of group, groups operation.
Among the described step c, comprise that also group's control module checks the step that called communication terminal is whether online.
Described method in caller communication terminal and called communication terminal communication process, increases the user in talk group the time, may further comprise the steps:
A, caller communication terminal transmission INVITE or UPDATE message in the SIP of this message expansion group information, show the called communication terminal that increases to called group control module in the group of conversing;
B, SIP Proxy resolve to group's control module this INVITE or UPDATE forwards;
C, group's control module are by resolving message, and SIP Proxy returns 200OK message for the caller communication terminal;
If the message of using in the D steps A is INVITE, then the caller communication terminal returns ACK message for group's control module by SIPProxy;
E, group's control module send INVITE for called communication terminal by SIP Proxy, notify it to add group call, comprise the SIP extend information in the message, and which user tells has had in the new groups of users, and the media information of group;
F, called communication terminal return 200OK message for group's control module by SIP Proxy, adhere to group, the media information of report simultaneously oneself;
G, group's control module add media context with the user, send ACK message for called communication terminal by SIP Proxy again, notify its call scenarios;
H, group's control module add by the new user of other user in the Notify message informing group.
Described method in caller communication terminal and called communication terminal communication process, when deleting the user in the talk group, may further comprise the steps:
A, first communication terminal send INVITE or UPDATE message to the second communication terminal, in the SIP expansion of this message, show deletion second communication terminal in the group of conversing;
B, SIP Proxy resolve to group's control module this INVITE or UPDATE forwards;
C, group's control module are verified the authority information of first communication terminal, return 200OK message for first communication terminal by SIP Proxy;
If the message of using in the D steps A is INVITE, then first communication terminal returns ACK message for group's control module by SIPProxy;
E, group's control module send out BYE message for the second communication terminal by SIP Proxy, notify it to withdraw from group call;
After F, second communication terminal are received this message, return 200OK message for group's control module, withdraw from group call by SIP Proxy;
G, group's controller send out other user of Notify message informing for other user has the user deleted.
Described method in caller communication terminal and called communication terminal communication process, when calling out maintenance and recovery, may further comprise the steps:
A, first communication terminal are sent out INVITE or UPDATE message by SIP Proxy to group's control module, the expansion of SIP group in this INVITE or the UPDATE message show the user be want to enter/withdraw from the calling hold mode;
B, group's control module are revised user's context, control first communication terminal and enter the calling hold mode, and group's control module is crossed SIP Proxy and sent out 200OK message to first communication terminal, notifies first communication terminal;
If the message of using in the C steps A is INVITE, then first communication terminal is sent out ACK message by SIPProxy to group's control module;
D, group's control module are sent out other user in the Notify message informing group;
Other user in E, the group sends out 200OK message response group control module.
Described method, if in the group information in the described SIP expansion, comprised member's sign, group's control module identifies by the member, the authority of checking communication terminal.
Described method in caller communication terminal and called communication terminal communication process, is called out when discharging, and may further comprise the steps:
A, caller communication terminal send BYE message, deliver to group's control module through SIP Proxy;
B, group's control module find it is the sip message that caller sends, and then send BYE message, terminated call by SIP Proxy to all users.
Described method in caller communication terminal and called communication terminal communication process, when called request is withdrawed from, comprising:
A, called communication terminal send BYE message to group's control module by SIP Proxy;
If B does not have other called communication terminal in the group this moment, group's control module discharges group call by SIP Proxy;
If C has other called communication terminal in the group this moment, then group's control module discharges called media context, and 200OK gives this called communication terminal by SIP Proxy response.
Described method, in caller communication terminal and called communication terminal communication process, if produce the group-media fault, perhaps calling subscriber's media defect or group surpass the time of network settings and do not converse, and then group's control module discharges group call.
Described method, in caller communication terminal and called communication terminal communication process, if called media defect, then group's control module discharges this called media resource, and deletion this is called.
The technology of the present invention mainly can be brought following beneficial effect:
For providing a kind of succinct method, SIP caller communication terminal only just can initiate group call with a piece of news.
The group management function of SIP group call is provided, and the user who includes authority can add or the deletion user for group, or discharges whole group call.
For providing to call out, all group call users keep function.
Provide media detection to report interface and treatment mechanism,, may notify SIP Proxy in time to remove the related media resource function if the user of conversation the situation of media break occurs and in time found by media network.
Prevent in the group the also situation of call release not of only surplus next user.
Control of authority is provided, controls certain user and can use a certain function.
Description of drawings
Fig. 1 is a SIP schematic network structure of the prior art;
Fig. 2 is the schematic flow sheet that conversation is set up in the existing SIP network technology;
Fig. 3 is a SIP schematic network structure of the present invention;
Fig. 4 is the structural representation of group of the present invention control module;
Fig. 5 is a call setup schematic flow sheet of the present invention;
Fig. 6 increases the schematic flow sheet of unique user in the talk group in the communication process of the present invention;
Fig. 7 is the schematic flow sheet of the user in the deletion talk group in the communication process of the present invention;
Fig. 8 is the schematic flow sheet that the calling in the communication process of the present invention keeps and recovers.
Embodiment
Below in conjunction with Figure of description the specific embodiment of the present invention is described.
The SIP expansion is the term of SIP, and one in the expression sip message increases part.Standard SIP allows to increase such expansion arbitrarily, but the definition of expansion is not added restriction, and the present invention increases a such part, and the present invention solves the aforementioned problem that will solve by the mode that increases the SIP extension field.The expansion that increases for treatment S IP group call is called for short " expansion of SIP group " hereinafter.
Networking of the present invention is as shown in Figure 3: it adopts Session Initiation Protocol is signaling communication, comprises the communication terminal that is connected with SIP Proxy by IP network, and described SIP Proxy and group's control module are controlled the foundation of group call between communication terminal jointly.
For making the expansion of communication network treatment S IP group, the present invention has increased group's control module of a treatment S IP group expansion.This group's control module receives SIP Proxy and transmits the end message that comes and parse the group information that carries in this end message, finishes foundation, modification and the release of communication terminal conversation according to this group information control SIP Proxy.
As shown in Figure 4, be the structural representation of group of the present invention control module, as can be seen from the figure, group of the present invention control module mainly comprises:
Adaptation module, group management module and Call Control Block are resolved in Session Initiation Protocol stack module, SIP expansion;
The mutual SIP extended message of described Session Initiation Protocol stack module and SIP Proxy resolves to the sip message of standard with it;
Described SIP expansion adaptation module is connected with Session Initiation Protocol stack module and Call Control Block, the SIP expansion of assembling or explanation SIP extended message;
Described Call Control Block is mutual according to SIP standard information and extend information and group management module, the sip message of generation standard and expansion, and the foundation of control group call is revised and is discharged;
Described group management module is extracted the static group information in the database, and the user's current information according to call management module transmits administers and maintains the multidate information of group and group user, and provides multidate information to use for Call Control Block.
After sip message enters group's control module, at first enter " Session Initiation Protocol stack module ", resolve to the sip message of standard, explain SIP expansion of the present invention by " adaptation module is resolved in the SIP expansion " again, handle by " Call Control Block " and " group management module " again and call out and group information.
When SIP group control module will be sent out message, generally initiate,, send sip message by " Session Initiation Protocol stack module " again and go out through " adaptation module is resolved in the SIP expansion " assembling SIP expansion by " Call Control Block " and " group management module " mutual back.
Group's control module is a functional entity, can do with SIP Proxy and be in the same place, and also can separate, and is the multiple business service.
If SIP Proxy and group's control module are separately, SIP Proxy can be provided with suitable IFC rule, when sip message has the expansion of the SIP of containing group, changes group's control module and handles.IFC refers to Initial FilterCriteria (initial filter standard or norm), is the rule of the control SIP Proxy behavior of 3GPP tissue proposition.But IFC is optional.
Among the present invention, support the SIP group expansion key element of group call that following content can be arranged:
1, group identification: the sign of a group of sign.If network predefine group, the user who sends out message can directly use the predefined group identification of network.If user-defined group does not use group identification.
2, group member tabulation: the address list that needs group member in the SIP expansion.The address can be S'URL or ENUM address.
3, member condition: marker group group membership's state.As online, refusal, off-line, interruption-free etc.
4, member type: sign is group member or personal user member.To network predefine group,, be group member therefore because use group identification; To User Defined group, the member occurs with personal user's identity.
5, member's authority: whether the expression member has the right to initiate group call, increase and deletion group member etc.
6, the owner of group: expression has the right to initiate the user of group call, increase and deletion group member etc.
Also can be the network manager.To self-defined group, the owner of group is exactly the caller communication terminal.The owner of group is a kind of of member type.
7, groups operation: operations such as the member of increasing, removing members, modification information about firms and covering group information can be arranged group.
Above key element can be looked concrete condition and be selected, and can be wherein a kind of, also can be wherein a plurality of combinations, is decided with reference to network function by the user.Above-mentioned key element can be increased in the message body of a specific type, and can occur with various concrete forms.
A kind of this expansion that realizes in message body can followingly be represented:
Expansion is divided into Group parameter, GroupOperation and GroupMember List parameter.
The Group parameter can be expressed as:
Group＝″group″″：″(group_name″；″addr-spec)*(″，″group_name″；″addr-spec)
It is the Group parameter that expression starts what represent the back with character string group.The back is with group's name and group address.
The GroupOperation parameter can be expressed as:
PTToperation＝″PTToperation：＝″″add″|″delete″|″modify″|″cover″
Represent the character representation after the GroupOperation parameter is by " PTTOperation ", " add " expression increases the operation of group member, the operation of " delete " expression removing members, the operation of member's parameter is revised in " modify " expression, and the operation of PTT expansion is revised in " cover " expression.
The GroupMemberList parameter can be expressed as:
Its grammer of PTTmember parameter is as follows:
PTTmember＝″PTTmember″″：″member-addr[*(″；″member-params)]*[″，″member-addr[*(″；″member-params)]]
member-params＝member-addr|member-status|member-priority|member-type|
member-status＝″status＝″″deactive″|″inviting″|″connected″|″rejected″|″busy″|″hold″|″leaved″|″deleted″|″error″|extension-attribute
member-type＝″mtype＝″″group-user″|″single-user″|″owner″
member-addr＝name-addr|addr-spec
member-priority＝″mpriority＝″1DIGIT；0-3
Expression begins to identify the GroupMemberList parameter with PTTMember.The latter is divided into member-addr and member-param parameter again.Member-addr represents the member address, and member-param can be subdivided into state (member-status), type (member-type), priority (member-priority) etc. again.
Adopt above-mentioned networking mode and SIP group the expansion after, call setup flow process of the present invention as shown in Figure 5:
To self-defined group, the present invention adopts following call setup flow process, as shown in Figure 5:
1, the caller communication terminal is set other member of group on terminal, and the caller communication terminal is A in this example, and called communication terminal is B and C.The caller communication terminal sends out INVITE for SIP Proxy, contains the information of user B and C in the SIP group expansion of message, shows that this time calling out is to invite user B and C to add group call.
2, SIP Proxy transmits the INVITE request to group's control module.The TO territory of this INVITE request is group's control module.Comprise the SIP expansion in this INVITE request, but only comprise member's tabulation.User adding to conversation in the TO territory of standard SIP in can only invitation message.The effect of this INVITE is a notice group control module, and the non-caller member that SIP is expanded in the member's tabulation that comprises is invited to session.
Owing to be the calling of self-defined group, group identification is just provided after receiving user INVITE request by group's control module, does not therefore have the group identification key element.
3, group's control module is checked the authority of A and is resolved.
4, group's control module is checked the authority of all called communication terminals and online situation whether.Be B and C in this example.Giving then has authority and online user to send out the INVITE order.Also comprise the SIP expansion for the INVITE of B and C, and comprised key elements such as member's tabulation, member type, member condition and member's authority.Optionally comprise the group identification that group's control module is distributed in the INVITE.
5, SIP Proxy receives INVITE and transmits INVITE and give all called communication terminals, is B and C in this example.
6, user B returns 200OK message to SIP Proxy after adhereing to session.SIP Proxy transmits message and gives group's control module.
7, group's control module sends out ACK message for user B after receiving the 200OK order.
8, user C returns 200OK message to SIP Proxy after adhereing to session.SIP Proxy transmits message and gives group's control module.
9, group's control module sends out ACK message for user C after receiving the 200OK order.
10, group's control module sends out 200OK message for user A.
11, user A returns ACK message for group's control module.
12, so far, system has entered the medium talking state.
To the call setup of predefine group, adopt identical flow process.But be not user list in the INVITE of caller communication terminal, but group's name.Network group name and information about firms can download to terminal in due course by group's control module, also can be initiated to download by terminal.Group's control module is resolved all the called communication terminals in the group and is invited called communication terminal to add one by one.
When the user in the called communication terminal does not belong to the group control module of caller communication terminal, the dynamic data that is to say called communication terminal is not in group's control module of caller communication terminal, then group's control module of caller communication terminal can not conduct a survey to the authority of called communication terminal, gives called communication terminal but necessarily send out INVITE through group's control module of called communication terminal.Group's control module of called communication terminal is at first checked the authority and the state of called communication terminal before transmitting INVITE.If do not have authority or user not online, then will not transmit.Whether check user's static datas such as authority information, can make by oneself by system designer in group's control module of caller communication terminal.
As shown in Figure 6, be to increase the schematic diagram of unique user in the talk group in the communication process of the present invention:
Suppose in communication process have the user of authority to wish to increase a new user in the PTT group call, he can finish this function with following flow process.Original A, B, three users of C in the following flow process hypothesis group.A has authority to increase new user.New user is D.The INVITE that caller in the following flow process is sent out also can replace with UPDATE, and caller correspondingly just need not be sent out corresponding ACK message.
1, user A sends out INVITE and gives user D.Message at first arrives SIP Proxy.Comprise member's key element of tabulating in the INVITE, have only the address of user D this moment in member's tabulation.Also comprise the groups operation key element in this message, indicating is that D is joined in the group.
2, SIP Proxy transmits INVITE to group's control module.
3, after group's control module is received message, know that according to SIP group extension field this increases new user's operation toward the group of conversing.Whether the control module inquiry A of group has authority to increase new user in group call.
If 4 A have authority, group's control module is returned 200OK message to A.200OK message is transmitted to user A by SIPProxy.A returns ACK message, gives group's control module through SIP Proxy.
5, group's control module does not wait A to return message, sends out INVITE just can for user D, notifies user D to add group call.In the SIP of INVITE group expansion, having indicated this message is to allow this user add group call, and tells the user D, and which member is arranged in the group.
6, user D receives the INVITE that SIP Proxy transmits, if adhere to, then returns 200OK message.Arrive group's control module through SIP Proxy.
7, group's control module sets up media resource for user D, sends out the ACK message that contains the expansion of SIP group again, notifies user D the situation of conversation.Message arrives D after SIP Proxy transmits.
8, group's control module is sent out Notify message to other all user, tells everybody new user D adds.
9, original user sends out the 200OK message response for group's control module.
Wherein the order of step 4 and step 5 can be exchanged.
INVITE in the above-mentioned message also can be message such as UPDATE.
As shown in Figure 7, be the schematic flow sheet of the unique user in the deletion talk group in the communication process of the present invention:
The flow process of deletion unique user is similar fully with the flow process that increases unique user in the communication process, but the control module deletion user of extended hints group of SIP group in the sip message.Flow process may further comprise the steps that (INVITE that the calling subscriber sends out in the following flow process also can replace with INVITE as shown in Figure 7.Caller correspondingly just need not be sent out corresponding ACK message.)：
1, user A sends out INVITE and gives user D.Message at first arrives SIP Proxy.Comprise member's key element of tabulating in the INVITE, have only the address of user D this moment in member's tabulation.Also comprise the groups operation key element in this message, indicating is that D is deleted from group.User A must be caller, or deletion user's authority is arranged.
2, SIP Proxy transmits INVITE to group's control module.
3, after group's control module is received message, know this operation toward the deletion user of group who is conversing according to SIP group extension field.Whether the control module inquiry A of group has the user in the authority deletion group call.
If 4 A have authority, group's control module is returned 200OK message to A earlier.200OK message is transmitted to user A by SIPProxy.A returns ACK message, gives group's control module through SIP Proxy.
5, group's control module does not wait A to return message, sends out BYE message just can for user D, notifies user D to withdraw from group call.
6, user D receives the BYE message that SIP Proxy transmits, and then returns 200OK message.Arrive the PTT controller through SIP Proxy.
7, group's control module is received the BYE message of user D or is exceeded the time that allows user D response, discharges user's media resource, and sends out Notify message to other all user, tells everybody new user D withdraws from.
8, other user sends out the 200OK message response for group's control module.
The order of above-mentioned steps 4 and step 5 can be exchanged.
This flow process also can substitute INVITE with UPDATE message and realize.
As shown in Figure 8, be to call out the schematic flow sheet that keeps and recover in the communication process of the present invention
In the group call process, the user can ask to suspend group call.At this moment, the user can't hear in the group other people and speaks, can not with group in other speak, but user's call information in network still keeps, can be at user's fast return group call at any time.
Suppose that user D wishes call out to keep, the flow process of crying maintenance specifically may further comprise the steps as shown in Figure 8:
1, user D sends out UPDATE message by SIP Proxy to group's control module.SIP group expansion in the UPDATE message indicates the user and wants to enter the calling hold mode.Comprise member's key element of tabulating in the INVITE, have only the address of user D this moment in member's tabulation.
2, after group's control module is received message, check rights state and the online situation of user D.
Keep if 3 user D have authority to call out, the media resource that group's control module is suspended the user uses, and sends out 200OK message by SIP Proxy to user D, notifies the user D.
4, group's control module is sent out other user in the Notify message informing group after sending out 200OK.
5, other user in the group sends out 200OK message response group control module.User D enters the calling hold mode.
The flow process of call recovery and calling keep identical, but the parameter of the expansion of the SIP group in the request message is different, and indicating is that call recovery rather than calling keep.
This function also may substitute UPDATE message with INVITE and realize.
If the user in D group's control module that not to be the caller communication terminal all, the INVITE of above-mentioned flow process or UPDATE message will be forwarded to group's control module at D place, by the authority of the control module inquiry B of group at D place.
Call out and discharge:
Have 3 kinds to call out release, below explanation respectively:
1, the calling of caller communication terminal initiation
The caller communication terminal is sent out BYE message, after group's control module is received, sends out BYE message, end of calling to all users.
2, called communication terminal is initiated, and do not have other called communication terminal in the group this moment
In this case, whole calling all will discharge.The user has discharged oneself with the calling of BYE release oneself, group's control module judgement this user, if having only the caller communication terminal in the group, then discharges the caller communication terminal of caller communication terminal, just discharges group call.
3, called communication terminal is initiated, and also have other called communication terminal in the group this moment
In this case, only discharge this user's calling.The user discharges the calling of oneself with BYE.
4, group-media fault
Group's control module with discharging the group call resource of this plate, just discharges associated call after detecting the group-media barrier.
5, user media fault
User and network are out of touch, surpass the time that network allows, and will discharge user's calling.If the caller communication terminal discharges group call; If called communication terminal, and do not have other called communication terminal in the group, also will discharge group call; If called communication terminal also has other called communication terminal in the group, this user's calling will only be discharged.
6, overtime
The long-time no one of group speaks, and surpasses the time of network settings, and group's control module can discharge group call.
The present invention is a kind of expansion of SIP, mainly can address the problem:
1, for providing a kind of succinct method, SIP caller communication terminal only just can initiate group call with a piece of news.
2, the group management function of SIP group call is provided, and the user who includes authority can add or the deletion user for group, or discharges whole group call.
3, for providing to call out, all group call users keep function.
4, provide media detection to report interface and treatment mechanism,, may notify SIP Proxy in time to remove the related media call function if the user of conversation the situation of media break occurs and in time found by media network.
5, prevent in the group the also situation of call release not of only surplus next user.
Present technique is a kind of complete new scheme.By adopting present technique, can carry out the group service that is subjected to user and operator's welcome on the net at various SIP, comprise the existing Push to Talk business that welcome by operator.
The technology of the present invention mainly can be brought following beneficial effect:
1, for providing a kind of succinct method, SIP caller communication terminal only just can initiate group call with a piece of news.
2, the group management function of SIP group call is provided, and the user who includes authority can add or the deletion user for group, or discharges whole group call.
3, for providing to call out, all group call users keep function.
4, provide media detection to report interface and treatment mechanism,, may notify SIP Proxy in time to remove the related media call function if the user of conversation the situation of media break occurs and in time found by media network.
5, prevent in the group the also situation of call release not of only surplus next user.
6, provide control of authority, control certain user and can use a certain function.
7, the control module combination of a plurality of groups, raising capacity can be arranged.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (13)
1, agreement (SIP) network configuration is set up in a kind of session, and adopting Session Initiation Protocol is signaling communication, comprises the communication terminal that is connected with SIP Proxy by IP network, the foundation of conversing between described SIP Proxy control communication terminal; It is characterized in that described network also comprises group's control module, described group control module receives SIP Proxy and transmits the end message that comes and parse the group information that carries in this end message, finishes the foundation of communication terminal conversation according to this group information control SIP Proxy.
2, agreement (SIP) network configuration is set up in session as claimed in claim 1, it is characterized in that described group control module comprises Session Initiation Protocol stack module, SIP expansion parsing adaptation module, group management module and Call Control Block;
The mutual SIP extended message of described Session Initiation Protocol stack module and SIP Proxy resolves to the sip message of standard with it;
Described SIP expansion adaptation module is connected with Session Initiation Protocol stack module and Call Control Block, the SIP expansion of assembling or explanation SIP extended message;
Described Call Control Block is mutual according to SIP standard information and extend information and group management module, the sip message of generation standard and expansion, foundation, modification and the release of control group call;
Described group management module is extracted the static group information in the database, and the user's current information according to call management module transmits administers and maintains the multidate information of group and group user, and provides multidate information to use for Call Control Block.
3, a kind of method that realizes the SIP group call, be applicable to that being controlled communication terminal and adopted Session Initiation Protocol by SIP Proxy is the network of signaling communication, foundation by conversing between SIP Proxy and group's control module control communication terminal is characterized in that may further comprise the steps:
A, caller communication terminal are provided with group member, and send INVITE to called communication terminal, in the SIP of this INVITE expansion, comprise the group information of caller communication terminal setting and the media information of caller communication terminal;
B, SIP Proxy are transmitted to group's control module with this INVITE and resolve;
C, group's control module are according to analysis result, for the caller communication terminal is set up media context;
D. group's control module send INVITE, this message to comprise group information and media information that group's controller is provided with for called communication terminal forwarding by SIP Proxy;
After e, called communication terminal receive above-mentioned message, send the 200OK order for group's control module, wherein comprise the media information that called communication terminal is provided with by SIP Proxy;
F, group's control module send the ACK order for called communication terminal by SIP Proxy after called communication terminal is added media context, notify called;
G, synchronously repeating step d is to f, being called in the group of invitation arbitrary number.
4, the method for realization as claimed in claim 3 SIP group call is characterized in that the group information in the described SIP expansion, comprises one or more combination of following content:
Group identification, group member tabulation, member condition, member type, member's authority, the owner of group, groups operation.
5, the method for realization as claimed in claim 3 SIP group call is characterized in that among the described step c, comprises that also group's control module checks the step that called communication terminal is whether online.
6, the method for realization as claimed in claim 3 SIP group call is characterized in that in caller communication terminal and called communication terminal communication process, and the increase user may further comprise the steps in talk group the time:
A, caller communication terminal transmission INVITE or UPDATE message in the SIP of this message expansion group information, show the called communication terminal that increases to called group control module in the group of conversing;
B, SIP Proxy resolve to group's control module this INVITE or UPDATE forwards;
C, group's control module are by resolving message, and SIP Proxy returns 200OK message for the caller communication terminal;
If the message of using in the D steps A is INVITE, then the caller communication terminal returns ACK message for group's control module by SIPProxy;
E, group's control module send INVITE for called communication terminal by SIP Proxy, notify it to add group call, comprise the SIP extend information in the message, and which user tells has had in the new groups of users, and the media information of group;
F, called communication terminal return 200OK message for group's control module by SIP Proxy, adhere to group, the media information of report simultaneously oneself;
G, group's control module add media context with the user, send ACK message for called communication terminal by SIP Proxy again, notify its call scenarios;
H, group's control module add by the new user of other user in the Notify message informing group.
7, the method for realization SIP group call as claimed in claim 3 is characterized in that in caller communication terminal and called communication terminal communication process, when deleting the user in the talk group, may further comprise the steps:
A, first communication terminal send INVITE or UPDATE message to the second communication terminal, in the SIP expansion of this message, show deletion second communication terminal in the group of conversing;
B, SIP Proxy resolve to group's control module this INVITE or UPDATE forwards;
C, group's control module are verified the authority information of first communication terminal, return 200OK message for first communication terminal by SIP Proxy;
If the message of using in the D steps A is INVITE, then first communication terminal returns ACK message for group's control module by SIPProxy;
E, group's control module send out BYE message for the second communication terminal by SIP Proxy, notify it to withdraw from group call;
After F, second communication terminal are received this message, return 200OK message for group's control module, withdraw from group call by SIP Proxy;
G, group's controller send out other user of Notify message informing for other user has the user deleted.
8, the method for realization SIP group call as claimed in claim 3 is characterized in that in caller communication terminal and called communication terminal communication process, when calling out maintenance and recovery, may further comprise the steps:
A, first communication terminal are sent out INVITE or UPDATE message by SIP Proxy to group's control module, the expansion of SIP group in this INVITE or the UPDATE message show the user be want to enter/withdraw from the calling hold mode;
B, group's control module are revised user's context, control first communication terminal and enter the calling hold mode, and group's control module is crossed SIP Proxy and sent out 200OK message to first communication terminal, notifies first communication terminal;
If the message of using in the C steps A is INVITE, then first communication terminal is sent out ACK message by SIPProxy to group's control module;
D, group's control module are sent out other user in the Notify message informing group;
Other user in E, the group sends out 200OK message response group control module.
9, as claim 4---the method for 8 any described realization SIP group calls is characterized in that group's control module identifies by the member if in the group information in the described SIP expansion, comprised member's sign, the authority of checking communication terminal.
10, the method for realization SIP group call as claimed in claim 3 is characterized in that in caller communication terminal and called communication terminal communication process, calls out when discharging, and may further comprise the steps:
A, caller communication terminal send BYE message, deliver to group's control module through SIP Proxy;
B, group's control module find it is the sip message that caller sends, and then send BYE message, terminated call by SIP Proxy to all users.
11, the method for realization SIP group call as claimed in claim 3 is characterized in that when called request is withdrawed from, comprising in caller communication terminal and called communication terminal communication process:
A, called communication terminal send BYE message to group's control module by SIP Proxy;
If B does not have other called communication terminal in the group this moment, group's control module discharges group call by SIP Proxy;
If C has other called communication terminal in the group this moment, then group's control module discharges called media context, and 200OK gives this called communication terminal by SIP Proxy response.
12, the method for realization SIP group call as claimed in claim 3, it is characterized in that in caller communication terminal and called communication terminal communication process, if produce the group-media fault, perhaps calling subscriber's media defect or group surpass the time of network settings and do not converse, and then group's control module discharges group call.
13, the method for realization as claimed in claim 3 SIP group call is characterized in that in caller communication terminal and called communication terminal communication process, if called media defect, then group's control module discharges this called media resource, and deletes that this is called.
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| CNB2003101103632A CN100527733C (en) | 2003-12-31 | 2003-12-31 | SIP system and method for implementing SIP group call |
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| CNB2003101103632A CN100527733C (en) | 2003-12-31 | 2003-12-31 | SIP system and method for implementing SIP group call |
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| WO2007124645A1 (en) * | 2006-04-28 | 2007-11-08 | Huawei Technologies Co., Ltd. | A method system and communicating apparatus for realizing the management of sip signaling network |
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| CN100411461C (en) * | 2006-07-20 | 2008-08-13 | 华为技术有限公司 | PoC group session realizing method and apparatus |
| WO2008080340A1 (en) * | 2006-12-30 | 2008-07-10 | Huawei Technologies Co., Ltd. | A packet service method and a network device |
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