CN101867586B - Method and system for realizing cross network segment signaling interworking of videoconference system - Google Patents
Method and system for realizing cross network segment signaling interworking of videoconference system Download PDFInfo
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- H04L12/00—Data switching networks
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- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
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Abstract
The invention discloses a method and a system for realizing cross network segment signaling interworking of a videoconference system, and is used for realizing RAS signaling interworking between a terminal and a gatekeeper in different network segments, wherein the method comprises the steps that: the terminal is registered to an RAS agent, the RAS agent establishes the mapping relation between a serial number in the RAS signaling message and the source IP address as well as port of the terminal after receiving the RAS signaling message initiated by the terminal, and forwards the RAS signaling message to a gatekeeper; and the RAS agent sends the RAS response message to the corresponding terminal according to the established mapping relation after receiving the RAS response message replied by the gatekeeper. The technical scheme of the invention can realize the RAS signaling communication between a plurality of terminals in different network segments and the gatekeepers in extranets.
Description
Technical field
The present invention relates to video conferencing technical field, relate in particular to a kind of method and system that realize TV conference system cross network segment signaling interworking.
Background technology
TV conference system refers to utilizes TV and special equipment, by communication, computer network, the meeting room in two places or a plurality of places is coupled together, and with TV mode, holds a kind of communication technology real-time, two-way, interactively video conferencing.TV conference system can connect a plurality of independently subnets, and allow the terminal in these subnets to add same meeting, because each subnet belongs to different networks, can not intercommunication between each subnet, therefore, how to realize the terminal guaranteed in each subnet can and the Internet on gatekeeper between RAS (Registration, Admission & Status, registration, access authentication and status poll) signalling interworking just become the problem that needs solve.
Summary of the invention
The technical problem that the present invention solves is to provide a kind of method and system that realize TV conference system cross network segment signaling interworking, for realizing the intercommunication of the terminal of different segment and the RAS signaling between gatekeeper.
For solving the problems of the technologies described above, the invention provides a kind of method that realizes TV conference system cross network segment signaling interworking, the method comprises:
Endpoint registration is to registration, access authentication and status poll (RAS) agency, RAS agency receives after the RAS signaling message of terminal initiation, set up sequence number and the source IP address of this terminal and the mapping relations of port in this RAS signaling message, and this RAS signaling message is forwarded to gatekeeper;
Described RAS agency receives after the RAS response message that gatekeeper replys, according to the described mapping relations of setting up, described RAS response message is sent to corresponding terminal.
Further, the RAS signaling message that described terminal is initiated comprises: registration request, call request, cancel register request, deletes terminal request or state keep-alive request.
Further, when the RAS signaling message that described terminal is initiated is login request message, described method specifically comprises:
When RAS agency receives the login request message of terminal, the First ray in described login request message number is replaced with after the second sequence number, described login request message is forwarded to gatekeeper; And described First ray number, the second sequence number and the source IP address of this terminal and the mapping relations of port are recorded to and are forwarded in mapping table;
When RAS agency receives accreditation verification that gatekeeper replys or registration reject message, according to the second sequence number in described accreditation verification or registration reject message, search described forwarding mapping table, and described the second sequence number is reduced to after First ray number, by described accreditation verification or registration reject message according to IP address corresponding to described the second sequence number finding and port repeat to corresponding terminal.
Further, described method also comprises:
When described RAS agency receives described accreditation verification or registration reject message, according to the port-mark of this terminal in described accreditation verification or registration reject message, source IP address and port, create or upgrade terminal list, wherein said terminal list is for preserving the corresponding relation of port-mark, source IP address and the port of terminal;
When described RAS agency receives the RAS signaling message that gatekeeper initiates, according to the terminal iidentification in described RAS signaling message, search terminal list, and according to IP address corresponding to the terminal iidentification finding and port, described RAS signaling message is forwarded to corresponding terminal.
Further, described method also comprises:
Described RAS agency receives after the described login request message of terminal transmission; if do not receive login request message or the state keep-alive request message of this terminal in predetermined time length, delete terminal iidentification, source IP address and the port of this terminal in described terminal list.
Further, the RAS signaling message that described gatekeeper initiates comprises: removal request, status request;
And described gatekeeper is when initiating status request message, and in the status request message of initiating, carried terminal identifies.
The present invention also provides a kind of system that realizes TV conference system cross network segment signaling interworking, and this system comprises: terminal, gatekeeper and RAS agency,
Described RAS agency is used for, and receives after the RAS signaling message of terminal initiation, sets up sequence number and the source IP address of this terminal and the mapping relations of port in this RAS signaling message, and this RAS signaling message is forwarded to gatekeeper; And, receive after the RAS response message of gatekeeper's reply, according to the described mapping relations of setting up, described RAS response message is sent to corresponding terminal;
Described gatekeeper is used for, and receives after the RAS signaling message of described RAS agency transmission, replys RAS response message.
Further, the RAS signaling message that described terminal is initiated comprises login request message;
Described RAS agency is further used for, and while receiving the login request message of terminal, the First ray in described login request message number is replaced with after the second sequence number, and described login request message is forwarded to gatekeeper; And described First ray number, the second sequence number and the source IP address of this terminal and the mapping relations of port are recorded to and are forwarded in mapping table; And while receiving accreditation verification that gatekeeper replys or registration reject message, according to the second sequence number in described accreditation verification or registration reject message, search described forwarding mapping table, and described the second sequence number is reduced to after First ray number, by described accreditation verification or registration reject message according to IP address corresponding to described the second sequence number finding and port repeat to corresponding terminal.
Further, described RAS agency also for, while receiving described accreditation verification or registration reject message, according to the terminal iidentification of this terminal in described registration confirmation message, source IP address and port, create or upgrade terminal list, wherein said terminal list is for preserving the corresponding relation of terminal iidentification, source IP address and the port of terminal; While receiving the RAS signaling message that gatekeeper initiates, according to the terminal iidentification in this RAS signaling message, search terminal list, and according to IP address corresponding to the terminal iidentification finding and port, described RAS signaling message is forwarded to corresponding terminal;
Wherein, the RAS signaling message that described gatekeeper initiates comprises: removal request, status request, and described gatekeeper is further used for, carried terminal sign in the message of initiating status request.
Further; described RAS agency also for; receive after the described login request message of terminal transmission; if do not receive login request message or the state keep-alive request message of this terminal in predetermined time length, delete terminal iidentification, source IP address and the port of this terminal in described terminal list.
Adopt technical solution of the present invention, can realize a plurality of terminals that are distributed in different segment (these network segments can not intercommunication) and carry out the communication of RAS signaling aspect with the gatekeeper in outer net.This scheme implements comparatively simple, and, owing to only need to use an outer net gatekeeper just can realize the registration demand of the terminal of a plurality of network segments simultaneously, thereby saved IP address resource.
Accompanying drawing explanation
Fig. 1 is the networking schematic diagram of realizing the intercommunication of RAS signaling cross-network segment of the embodiment of the present invention;
Fig. 2 is the RAS Signalling exchange schematic diagram between the modules of the embodiment of the present invention;
Fig. 3 is being acted on behalf of and realized signaling forwarding schematic diagram by RAS under the scene of terminal transmission RRQ of the embodiment of the present invention;
Fig. 4 is sending under the scene of DRQ RAS agency by gatekeeper and realizing signaling and forward schematic diagram of the embodiment of the present invention.
Embodiment
In order to solve the problem that the RAS signaling between conference terminal and gatekeeper in the situation of not intercommunication of multisegment can not intercommunication, the invention provides a kind of scheme of TV conference system cross network segment signaling interworking, its basic conception is as follows:
For realizing the obstructed logical subnetwork of several IP layers, communicate, consider to introduce the cross-network segment transmission that a RAS agency realizes RAS signaling, can be smoothly with gatekeeper's communication by being simple and easy to terminal that the method for the agency service of use realizes in different segment, and implement fairly simplely, do not need to distribute a special IP address for the terminal of each network segment.
After introducing RAS agency, the concrete transfer mechanism that the RAS signaling between terminal and gatekeeper is acted on behalf of by RAS, is specifically related to following two aspects:
1. how correct the RAS signaling sent from terminal is is transmitted to gatekeeper, in the situation that there is a plurality of subnet, terminal in different sub-network is registered RAS agency respectively as gatekeeper, and RAS agency is after receiving related signaling, is transmitted to the gatekeeper in outer net;
2. how correct the RAS signaling sent from gatekeeper is is transmitted to terminal, owing to there being a plurality of terminals, thereby need to determine which terminal is the RAS signaling that gatekeeper sends be transmitted to.But because RAS signaling is not to prepare for cross-network segment, there is no can not provide the IP field that is forwarded to certain designated terminal yet, therefore, need to find out corresponding solution.When considering solution, also need to consider two kinds of situations: the passive transmission of a kind of gatekeeper of being RAS signaling, such as terminal first sends RRQ (RegistrationRequest to gatekeeper, endpoint registration request) message, gatekeeper replys RCF (Registration Confirm, endpoint registration is confirmed) or the situation of RRJ (Registration Reject, endpoint registration refusal) message; Another kind is the RAS signaling that gatekeeper initiatively initiates, and such as what gatekeeper initiatively sent to terminal, hangs up endpoint registration Indication message DRQ (Disengage Request, terminal deletion request).Consider that RAS signaling is all catechetical based on UDP (User Datagram Protocol, User Datagram Protocol), terminal sends a request, and then gatekeeper replys this request, for example corresponding RCF of RRQ (asking) (answering); In addition, in RAS signaling, all include a sequence number (sqNum) field.Therefore, can utilize sqNum as index, set up RAS message and the sign of corresponding terminal or the corresponding relation between IP address, and then the request <-> completing between terminal and gatekeeper reply flow process.
Based on above basic conception, the invention provides a kind of method that realizes TV conference system cross network segment signaling interworking, endpoint registration is after RAS agency, and the method comprises:
When RAS agency receives the RAS signaling message of terminal initiation, set up sequence number and the source IP address of this terminal and the mapping relations of port in RAS signaling message, and described RAS signaling message is forwarded to gatekeeper;
Described RAS agency receives after the RAS response message that gatekeeper replys, according to the described mapping relations of setting up, described RAS response message is sent to corresponding terminal.
Wherein, the RAS signaling message that described terminal is initiated comprises: registration request (RRQ), call request (ARQ), cancel register request (URQ), deletes terminal request (DRQ) or state keep-alive request (IRR).
Further, when described RAS signaling is rrq message, RAS agency specifically realizes in the following way the intercommunication of RAS signaling cross-network segment and processes:
When RAS agency receives the rrq message of terminal, produce a new sqNum, former sqNum in described rrq message (below also referred to as a sqNum) is replaced with after the new sqNum (below also referred to as the 2nd sqNum) of generation, described rrq message is forwarded to gatekeeper; And a described sqNum, the 2nd sqNum and the source IP address of this terminal and the mapping relations of port are recorded to and are forwarded in mapping table;
When RAS agency receives RCF that gatekeeper replys or RRJ message, according to the 2nd sqNum in described RCF or RRJ message, search described forwarding mapping table, and the 2nd sqNum in RCF or RRJ message is reduced to after a sqNum, by described RCF or RRJ message according to IP address corresponding to described the 2nd sqNum finding and port repeat to corresponding terminal.
It should be noted that, the content of preserving in the forwarding mapping table in the present invention comprises former sqNum, new sqNum, IP address and port.
Further, when RAS agency receives RCF that gatekeeper replys or RRJ message, judge whether to record IP address and the terminal iidentification of this terminal, if do not have, the IP address of terminal and terminal iidentification are kept in terminal list;
When RAS agency receives the RAS signaling message (as DRQ message, IRQ message etc.) that gatekeeper initiatively initiates, according to the terminal iidentification in this RAS signaling message, search terminal list, IP address and the port corresponding according to the terminal iidentification finding, be forwarded to corresponding terminal by this RAS signaling message.
Clearer for what object of the present invention, technical method and advantage were expressed, below in conjunction with accompanying drawing and preferred embodiment, the present invention is done to further description.
Fig. 1 shows the networking schematic diagram of realizing RAS signaling cross-network segment intercommunicating system of the embodiment of the present invention, this system comprises terminal, gatekeeper, as shown in Figure 1, terminal protocol stack in different segment and can not the local area network (LAN) of intercommunication in, and gatekeeper is in the Internet net, in order to realize the intercommunication of the RAS signaling between terminal protocol stack and gatekeeper, in the present embodiment, introduced RAS agency, the major function that wherein each network element is realized is described below:
Terminal protocol stack, the Signalling exchange of main realization and gatekeeper and multiple spot control module (MCU);
Gatekeeper, is mainly responsible for processing terminal registration, calls out Bandwidth Management etc.;
RAS agency, is mainly used in realizing the intercommunication processing of RAS signaling cross-network segment, comprising: the terminal protocol stack in network segment B is dealt into agency's RAS message, by another segment A, is forwarded to gatekeeper; And by the RAS message of the gatekeeper in segment A, by the network segment, B is forwarded to terminal.
Wherein, conference terminal (being also called for short terminal) is registered to RAS agency and can realizes in the following way: RAS agency can cross over a plurality of network segments, in multisegment situation, each network segment has corresponding IP address, RAS agency can intercept message on the IP address of a plurality of network segments, and the terminal in certain network segment is registered to RAS agency on should the IP address of the network segment.
In addition, RAS agency possesses the function of RAS encoding and decoding, can resolve RAS signaling.For RAS signaling, only need to upgrade sqNum, or extract some relevant information (as IP address, port information etc.) and preserve, other guide need not be revised, and directly full content is forwarded.
Further, RAS agency also for:
From segment A receives gatekeeper's RCF or RRJ message, judge whether to record terminal iidentification, source IP and the port of this terminal in RCF message, if there is no record, a newly-built terminal list, is kept at the terminal iidentification in RCF message, source IP and port in newly-built terminal list; If record, only needs the terminal list to having recorded to upgrade.
Similarly, when RAS agency receives other message from network segment B, also should judge source IP and port, if existing corresponding record is forwarded to gatekeeper; If there is no record, show the also not registration of this terminal, abandon.
Thereby RAS agency is follow-up when receiving the RAS signaling message that gatekeeper initiatively initiates, and can search according to the terminal iidentification carrying in RAS signaling message the terminal list of preservation, and this RAS signaling message is forwarded to corresponding terminal.
In addition; RAS agency can set up timeout mechanism; if after receiving the rrq message of terminal in predetermined time length (as 10 minutes etc.) do not receive RRQ (comprise keep-alive RRQ or completely RRQ) or IRR message, delete source IP address, port and terminal iidentification in corresponding terminal list.
As shown in Figure 2, RAS signaling is all catechetical based on UDP.RAS Signalling exchange flow process between modules is shown in Fig. 2.
Wherein, the RAS signaling that terminal is initiatively initiated comprises: login request message, ARQ (call request message), URQ (cancel register request message), DRQ (deletion request message) or RR (state keep-alive message) etc.
The RAS signaling that gatekeeper initiatively initiates comprises: DRQ (deletion request message), IRQ (SOT state of termination request message) etc.
Wherein, DRQ message both can terminal be initiated, and also can be initiated by GK.
Fig. 3 shows take terminal to send RRQ is example, and RAS agency realizes the handling process that signaling forwards, the RAS signaling of initiatively initiating for other-end, and as ARQ, DRQ etc., its forwarding strategy is applicable too.As shown in Figure 3, this flow process specifically describes as follows:
After RAS agency receives the rrq message of terminal transmission, because gatekeeper only has one, it is just passable that RAS signaling is directly transmitted to gatekeeper, and according to the sqNum sequence number in RAS signaling, be that a forwarding mapping table set up in index before transmission, in table, store the IP address of associated terminal, sign, the relevant informations such as port; After RAS agency receives the RCF message that gatekeeper replys, resolve the sequence number in message and according to index, find the IP address of counterpart terminal, and send to corresponding terminal.
In addition, referring to Fig. 3, when RAS agency receives RCF that gatekeeper replys or RRJ message, also will create or upgrade terminal list according to the IP address of this terminal in described RCF message and terminal iidentification, wherein said terminal list be for preserving the corresponding relation of IP address, port and the terminal iidentification of terminal.
Fig. 4 shows take gatekeeper and sends DRQ as example, and RAS agency realizes the handling process that signaling forwards, the RAS signaling of initiatively initiating for other gatekeepers, and as IRQ etc., its forwarding strategy is applicable too.As shown in Figure 4, this flow process specifically describes as follows:
The RAS signaling request of initiatively initiating for gatekeeper, the terminal list that before utilizing, RAS agency sets up, it is index that this terminal list mainly be take terminal iidentification (endPointID), main IP address and the port information of preserving terminal, like this, RAS agency just can find counterpart terminal address by this terminal list.That is,, when RAS agency receives the RAS signaling message that gatekeeper initiates, according to the terminal iidentification in this RAS signaling message, search terminal list, and according to IP address corresponding to the terminal iidentification finding and port, this RAS signaling message is forwarded to corresponding terminal.
But wherein have individual special case, there is no this field of endPointID in IRQ (meeting keep-alive request) message, this need to revise gatekeeper's processing, when sending IRQ, increase this field of terminal iidentification.
One of ordinary skill in the art will appreciate that all or part of step in said method can come instruction related hardware to complete by program, described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can realize with one or more integrated circuits.Correspondingly, each the module/unit in above-described embodiment can adopt the form of hardware to realize, and also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Claims (8)
1. a method that realizes TV conference system cross network segment signaling interworking, is characterized in that, the method comprises:
Endpoint registration is to registration, access authentication and status poll (RAS) agency, RAS agency receives after the RAS signaling message of terminal initiation, set up sequence number and the source IP address of this terminal and the mapping relations of port in this RAS signaling message, and this RAS signaling message is forwarded to gatekeeper;
Described RAS agency receives after the RAS response message that gatekeeper replys, according to the described mapping relations of setting up, described RAS response message is sent to corresponding terminal;
The RAS signaling message that described terminal is initiated comprises login request message;
When the RAS signaling message that terminal is initiated is login request message, described method specifically comprises:
When RAS agency receives the login request message of terminal, the First ray in described login request message number is replaced with after the second sequence number, described login request message is forwarded to gatekeeper; And described First ray number, the second sequence number and the source IP address of this terminal and the mapping relations of port are recorded to and are forwarded in mapping table;
When RAS agency receives accreditation verification that gatekeeper replys or registration reject message, according to the second sequence number in described accreditation verification or registration reject message, search described forwarding mapping table, and described the second sequence number is reduced to after First ray number, by described accreditation verification or registration reject message according to IP address corresponding to described the second sequence number finding and port repeat to corresponding terminal.
2. the method for claim 1, is characterized in that,
The RAS signaling message that described terminal is initiated also comprises: call request, cancel register request, deletes terminal request or state keep-alive request.
3. method as claimed in claim 2, is characterized in that, described method also comprises:
When described RAS agency receives described accreditation verification or registration reject message, according to the port-mark of this terminal in described accreditation verification or registration reject message, source IP address and port, create or upgrade terminal list, wherein said terminal list is for preserving the corresponding relation of port-mark, source IP address and the port of terminal;
When described RAS agency receives the RAS signaling message that gatekeeper initiates, according to the terminal iidentification in described RAS signaling message, search terminal list, and according to IP address corresponding to the terminal iidentification finding and port, described RAS signaling message is forwarded to corresponding terminal.
4. method as claimed in claim 3, is characterized in that, described method also comprises:
Described RAS agency receives after the described login request message of terminal transmission; if do not receive login request message or the state keep-alive request message of this terminal in predetermined time length, delete terminal iidentification, source IP address and the port of this terminal in described terminal list.
5. method as claimed in claim 3, is characterized in that,
The RAS signaling message that described gatekeeper initiates comprises: removal request, status request;
And described gatekeeper is when initiating status request message, and in the status request message of initiating, carried terminal identifies.
6. a system that realizes TV conference system cross network segment signaling interworking, is characterized in that, this system comprises: terminal, gatekeeper and RAS agency,
Described RAS agency is used for, and receives after the RAS signaling message of terminal initiation, sets up sequence number and the source IP address of this terminal and the mapping relations of port in this RAS signaling message, and this RAS signaling message is forwarded to gatekeeper; And, receive after the RAS response message of gatekeeper's reply, according to the described mapping relations of setting up, described RAS response message is sent to corresponding terminal;
Described gatekeeper is used for, and receives after the RAS signaling message of described RAS agency transmission, replys RAS response message;
The RAS signaling message that described terminal is initiated comprises login request message;
Described RAS agency is further used for, and while receiving the login request message of terminal, the First ray in described login request message number is replaced with after the second sequence number, and described login request message is forwarded to gatekeeper; And described First ray number, the second sequence number and the source IP address of this terminal and the mapping relations of port are recorded to and are forwarded in mapping table; And while receiving accreditation verification that gatekeeper replys or registration reject message, according to the second sequence number in described accreditation verification or registration reject message, search described forwarding mapping table, and described the second sequence number is reduced to after First ray number, by described accreditation verification or registration reject message according to IP address corresponding to described the second sequence number finding and port repeat to corresponding terminal.
7. system as claimed in claim 6, is characterized in that,
Described RAS agency also for, while receiving described accreditation verification or registration reject message, according to the terminal iidentification of this terminal in described registration confirmation message, source IP address and port, create or upgrade terminal list, wherein said terminal list is for preserving the corresponding relation of terminal iidentification, source IP address and the port of terminal; While receiving the RAS signaling message that gatekeeper initiates, according to the terminal iidentification in this RAS signaling message, search terminal list, and according to IP address corresponding to the terminal iidentification finding and port, described RAS signaling message is forwarded to corresponding terminal;
Wherein, the RAS signaling message that described gatekeeper initiates comprises: removal request, status request, and described gatekeeper is further used for, carried terminal sign in the message of initiating status request.
8. the system as described in claim 6 or 7, is characterized in that,
Described RAS agency also for; receive after the described login request message of terminal transmission; if do not receive login request message or the state keep-alive request message of this terminal in predetermined time length, delete terminal iidentification, source IP address and the port of this terminal in described terminal list.
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| CN201010215012.8A CN101867586B (en) | 2010-06-29 | 2010-06-29 | Method and system for realizing cross network segment signaling interworking of videoconference system |
| PCT/CN2011/074993 WO2012000364A1 (en) | 2010-06-29 | 2011-05-31 | Method and system for implementing cross-segment signaling intercommunication in video conference system |
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| CN101867586B (en) * | 2010-06-29 | 2014-08-13 | 中兴通讯股份有限公司 | Method and system for realizing cross network segment signaling interworking of videoconference system |
| CN102523572B (en) * | 2011-11-23 | 2017-12-22 | 中兴通讯股份有限公司 | The processing method and processing device of call request message |
| CN102594866B (en) * | 2011-12-22 | 2015-02-18 | 中国电子科技集团公司第十五研究所 | Map service providing system and method |
| CN104660952B (en) * | 2015-03-04 | 2018-06-08 | 苏州科达科技股份有限公司 | Video conference communication method and system |
| CN108055262B (en) * | 2017-12-11 | 2020-08-18 | 苏州科达科技股份有限公司 | Video conference terminal registration method, terminal and gatekeeper |
| CN109445925B (en) * | 2018-11-09 | 2022-02-18 | 郑州云海信息技术有限公司 | Application program takeover method, device and system |
| CN109889763B (en) * | 2019-03-20 | 2020-12-25 | 苏州科达科技股份有限公司 | Call establishment method, device and storage medium of conference television system |
| CN111083427B (en) * | 2019-12-27 | 2021-05-18 | 随锐科技集团股份有限公司 | Data processing method of embedded terminal and 4K video conference system |
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