CN100382507C - Method for reinforcing coupling mechanism between cascade network gate-guard - Google Patents
Method for reinforcing coupling mechanism between cascade network gate-guard Download PDFInfo
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- CN100382507C CN100382507C CNB2005101129326A CN200510112932A CN100382507C CN 100382507 C CN100382507 C CN 100382507C CN B2005101129326 A CNB2005101129326 A CN B2005101129326A CN 200510112932 A CN200510112932 A CN 200510112932A CN 100382507 C CN100382507 C CN 100382507C
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Abstract
The present invention relates to a method for strengthening a coupling mechanism between cascade network gatekeepers, which is used between the cascade gatekeepers or between the gatekeeper and a terminal. A content used for assistant call control is added to an RAS message used between the cascade gatekeepers or between the gatekeeper and the terminal. The gatekeepers or the terminal operates according to the call control content contained in the RAS message. The method can strengthen the original looser coupling mechanism of the cascade gatekeepers, and a proposal for solving numbers among the multistage gatekeepers can be easily simplified by the strengthened coupling mechanism. Simultaneously, the present invention also provides a method for real-time number analysis information of the gatekeepers and the terminal, which increases the flexibility of calling number by users.
Description
Technical field
The present invention relates to a kind of reinforcement cascade network gate-guard (Gatekeeper, also claim to close keep, gateway) between the method for coupling mechanism, relate in particular to a kind of registering functional that utilizes cascade network gate-guard inside, strengthen the method for coupling mechanism between the gatekeeper, belong to internet voice transmission (VoIP) technical field.
Background technology
VoIP is based upon the technical packetizing of IP, digitlization transmission technology, its basic principle is: by voice compression algorithm speech data is carried out compressed encoding and handle, then these speech datas are packed by related protocols such as IP, through IP network data packet transmission is arrived reception ground, again these VoPs are stringed together, after the decoding decompression processing, revert to original voice signal, thereby reach the purpose that transmits voice by IP network.It has promoted network resource usage, has reduced the speech business cost, has therefore obtained development rapidly in the world.
Existing VoIP system generally is made up of several parts such as IP phone terminal, gateway (Gateway), gatekeeper, network management system, charge systems, and H.323 they follow agreement and carry out work.Wherein, gatekeeper's effect is the equal of the intelligent HUB of IP telephony network, and it is the service platform of whole system, is responsible for management, configuration and the maintenance of system.
According to the needs of practical business, in a VoIP system, the gatekeeper has a plurality of usually, and can be according to the different gatekeepers that are divided into different stage of region and supervisory level.There are two kinds of connected mode-multistage connected modes and cascade connected mode between each gatekeeper.Fig. 1 is an example of multistage connected mode.In multistage connected mode, the gatekeeper generally is divided into three layers, is respectively three grades of gatekeepers, secondary gatekeeper and level-1 GK, and the process of calling out between the gatekeeper generally includes following step:
1. terminal makes a call, and carries out number and resolves (analyzing called number obtains information such as called address), can send analysis request message to gatekeeper at the corresponding levels;
2. initiator's called party information is then responded in gatekeeper of subordinate such as resolving called success; Under the situation that can't analyze called party information (non-local number), then transmit resolving information to higher level gatekeeper;
3. higher level gatekeeper then sends it back the gatekeeper of subordinate with called gatekeeper or terminal called address as being resolved to called party information; Then continue upwards level-1 GK forwarding parsing message as still resolving, so analogize; Resolve success as certain grade of gatekeeper and then former road analysis result message is sent it back former initiator's terminal in the other direction by transmitting message.
4. the gatekeeper of subordinate transmits message and gives initiator's terminal after obtaining to resolve success message; Resolve failure and then respond initiator's terminal parses failed message.
5. initiator's terminal is set up calling signaling message to the other side's transmission after obtaining to resolve successful called address information such as (or called place gatekeepers), finishes calling.
Cascade is another connected mode between the gatekeeper.In cascade system, there is not relationship between superior and subordinate between the gatekeeper, be in identical status.Fig. 2 is an example of cascade network gate-guard mode, and the process of calling out between existing network is kept in fact comprises following step:
1. terminal makes a call, and carries out number and resolves (analyzing called number obtains information such as called address), can send analysis request message to gatekeeper at the corresponding levels;
2. initiator's called party information is then responded in gatekeeper at the corresponding levels such as resolving called success; Under the situation that can't analyze called party information (non-local number), then other cascade network gate-guard message pollings of preserving according to inside are transmitted resolving information;
3. as still can't resolve then to respond and resolve failed message; Original gatekeeper then keeps transmission parsing message to the next stage networking after receiving and resolving failed message, and poll like this is up to looking through all cascade network gate-guards; Cascade network gate-guard then sends it back original gatekeeper with called gatekeeper or terminal called address as being resolved to called party information;
4. original gatekeeper transmits message and gives initiator's terminal after obtaining to resolve success message; Resolve failure and then respond the parsing failed message.
5. initiator's terminal is set up calling signaling message to the other side's transmission after obtaining to resolve successful called address information such as (or called place gatekeepers), finishes calling.
At present, domestic telecommunications industry is resolved improvement by multistage parsing to cascade.Therefore the cascade network gate-guard mode will become the main mode of future communications, but still there is following shortcoming in it:
1. multistage gatekeeper's quantity more for a long time, multi-stage authentication message is consuming time bigger, resolves slowlyer, causes the user to continue slowly;
2. other cascade network gate-guard information (cascade network gate-guard is fixed, but the area code of cascade network gate-guard may often upgrade) will be preserved in gatekeeper inside, the configuration difficulty, and it is dumb to revise maintenance.
3. terminal equipment can not obtain the number analysis plan (dial plan) of whole network in real time, only revises configuration by the keeper or upgrades by # bond bundle, mode such as overtime, and the user uses inconvenience.
Summary of the invention
Based on above-mentioned problem, the purpose of this invention is to provide a kind of method of reinforcing coupling mechanism between cascade network gate-guard.This method realizes based on the information interaction mechanism of cascade network gate-guard itself, and is easy and effective.
For realizing above-mentioned goal of the invention, the present invention adopts following technical scheme:
A kind of method of reinforcing coupling mechanism between cascade network gate-guard is used between the gatekeeper of cascade or between gatekeeper and the terminal, it is characterized in that comprising the steps:
(1) in RAS message, increases the content that is used for assisted call control;
(2), communicate by RAS message mechanism between the gatekeeper of cascade or between gatekeeper and the terminal in the call initiationc stage;
(3) described gatekeeper or terminal are obtained the content that is used for assisted call control in described RAS message;
(4) described gatekeeper or terminal are carried out work according to the described content that is used for assisted call control.
Described RAS message is the message RCF that succeeds in registration.
The gatekeeper of described cascade is in the process of registering by RRQ/RCF message, by the update number code word hat tabulation each other of the number prefix information in the RCF message.
When described gatekeeper changes in this gatekeeper's calling control content, in the RCF message of responding other gatekeepers or terminal, add corresponding calling control content.
Described gatekeeper or terminal find have after the new calling control content in described RCF message, corresponding number prefix information or the dial plan that upgrades this locality.
Method provided by the present invention can make originally, and looser cascade network gate-guard coupling mechanism is strengthened.Utilize the coupling mechanism of this reinforcement, can simplify the scheme that number solves between the multistage gatekeeper at an easy rate.Simultaneously, the present invention also provides the method for the real-time number resolving information of gatekeeper and terminal, improves the flexibility of user's dial number.
Description of drawings
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is for showing the schematic diagram of number resolving in the existing multi-level network defence formula;
Fig. 2 is for showing the schematic diagram of number resolving in the existing cascade network gate-guard mode;
Fig. 3 is the signaling process schematic diagram of call initiationc process.
Fig. 4 is for showing the number resolving schematic diagram after cascade network gate-guard is implemented the method for the invention;
Fig. 5 is for showing signaling (comprising the renewal of the number prefix) schematic flow sheet after cascade network gate-guard is implemented the method for the invention.
Embodiment
According to the regulation of agreement H.323, the gatekeeper is used to provide the H.323 management and the controlled function of end points and calling, and its particular content comprises:
(1) registration management: be used for gateway registration and cancel register to the gatekeeper
Registration message is handled: gateway sends the login request message request registration to the gatekeeper.The gatekeeper is according to the data of configuration, the gateway that judge to send login request message whether in this gatekeeper's compass of competency, the gatekeeper identifies whether ID conforms to, whether security verification passes through, and determines the loopback registration to confirm still registration reject message thus.
Deregister message is handled: deregister message is used for gateway cancellation to the gatekeeper, i.e. cancel register.Gateway sends deregister message to the gatekeeper, the gatekeeper is according to the data of configuration, judge to send the gateway of deregister message or the gatekeeper of subordinate whether in this gatekeeper's compass of competency, whether whether conform to, whether also have survival to call out on this gateway by registration, gatekeeper ID, decision loopback cancel register acknowledgement message still is the cancel register refuse information.
(2) district management: by defining territory one by one, can form Hierarchical network between the gatekeeper, also can form Star Network.
(3) call out access control: after gateway sent to the gatekeeper and calls out the request of access, the gatekeeper determined whether allowing this node access to call out according to current Access Control Policy.Do not send access-reject message if do not allow to insert then to gateway, insert acknowledgement message otherwise send out, if there are a plurality of gateways to support this access code, the gatekeeper can return the address of all called gateways in inserting acknowledgement message.
(4) address resolution: according to the type of address analysis request message sender, address resolution is divided into the address resolution request of gateway transmission and the address resolution request that the gatekeeper sends.
Gateway sends address resolution request message to the gatekeeper, and this message comprises the called phone number.The gatekeeper carries out the maximum coupling according to telephone number and routing table numbering, finds corresponding routing table.Obtain the configuration information of called gateway according to routing table, get its call signaling address,, take out the call signaling address of all gateway supports if a plurality of gateway supports are arranged.If called gateway is not in this gatekeeper's compass of competency, the gatekeeper can send out the address resolution request to other gatekeeper known to it according to the far-end gatekeeper allocation list information of oneself, after the far-end gatekeeper receives address resolution request message, parse called gateway IP (in this territory) or transmit this analysis request to another one gatekeeper (not in this territory) or abandon this request message according to called number, if it is called through finding after the address resolution, then should find the call signaling address of called gateway according to the called phone number, upwards make the gatekeeper return acknowledgement message if find then, otherwise, return refuse information.
(5) call manager: the gatekeeper can safeguard ongoing call information, accepts the authentication request of calling, by recovering affirmation or refusing message calling is managed.
(6) routing management: in gatekeeper's routing table, each area code can corresponding a plurality of routes, and route has priority, and routing is from the high priority route, if the high priority route is congested or unreachable, selects the low priority route again.
(7) gatekeeper's communication between domains: gatekeeper's communication between domains function is used to handle the RAS message relevant with communication between domains (ARQ, LRQ etc.), comprises the maintenance of interregional address resolution and communication between domains table.
In addition, the gatekeeper also has the function of Bandwidth Management and safety management.
Though the gatekeeper has above-mentioned management and controlled function.But in existing H.323 mechanism, the coupling mechanism between each gatekeeper remains more open.Under this loose coupling mechanism, mainly realize the renewal of relevant communication control information between each territory of different gatekeeper's controls by the RAS message (ARQ, LRQ etc.) relevant with communication between domains.But this renewal is untimely often.For example, if the some gatekeepers in the cascade upgrade its local domain number prefix temporarily, then by above-mentioned cascade network gate-guard coupling mechanism, adjacent gatekeeper its gatekeeper's prefix tabulation that can't upgrade in time causes the calling in this gatekeeper zone to be obstructed.At this situation, often need the relevant configuration information of keeper manual amendment, can increase keeper's work load so greatly, and this manual amendment's real-time is not enough, user's proper communication still can be affected.
The inventor has anatomized the calling procedure under the agreement H.323, has proposed a kind of method of new reinforcing coupling mechanism between cascade network gate-guard.This method is utilized the RAS (Registration that H.323 agreement provided, Admission, and Status) message mechanism, in RAS message, increase the content that is used for assisted call control, as new region number prefix, new dialing pattern etc., and utilize the general modfel (gateway sends a request to the gatekeeper, and the gatekeeper returns and accepts or refuse information then) of RAS message mechanism.In addition, the assisted call control content here has two kinds of modes of intelligence transmission, and a kind of is to utilize existing field (this field can be preserved prefix information, does not use substantially at present) among the RAS; The 2nd, transmit by the nonstandard field of RAS (be used for user manufacturer and transmit self-defined message).Both modes all can realize our function.By above-mentioned technical scheme, under the prerequisite that does not change the basic operating mechanism of gatekeeper, realized the RAS message mechanism that function is strengthened, thereby effectively strengthened the coupling mechanism between the cascade network gate-guard.
Below, just with prefix information, for example method of the present invention is given further instruction thereby make dial plan keep up-to-date by RAS message real-time update cascade network gate-guard inside.
RAS message is message a kind of of H.323 agreement regulation, mainly comprises contents such as registration, access control and state.The RAS message coding adopts text formatting, mainly is made of message name and a series of parameter that must join/match, and different message have different parameters.
In the regulation of agreement H.323, its call model is divided into 5 stages.
1) call initiationc.
2) initial communication between end points and end points capacity exchange.
3) set up audio/visual communication between the end points.
4) call service request and negotiation.
5) call termination.
Method of the present invention played a role in the call initiationc stage.As shown in Figure 3, this zone is arranged in the private IP network network by gatekeeper's control, and its IP address is 10.0.0.1.Caller A is positioned at IP network address 10.0.0.10, wishes the user B of calling, and B and A are arranged in same zone, and the IP address is 10.0.0.12.
In the stage of call initiationc, also do not have to a gatekeeper registers if wish the user terminal of calling out, this terminal is sought registration with login request message (RRQ).RRQ/RCF exchange is not the part of call treatment, and it is only wished according to starting or operational order occurs when registering to the gatekeeper at a terminal.In traditional registration process, the RRQ/RCF exchange includes only registration terminal type, transport address, all another names and signaling address usually.Therefore, if variation has taken place the prefix of number, traditional registration process can not in time reflect this variation, thereby cause the calling of local terminal to realize smoothly.In the present invention, relevant prefix lastest imformation is also listed in the RRQ/RCF exchange process.By the exchange of RRQ/RCF,, can send the message (RCF) that succeeds in registration to this terminal, and comprise above-mentioned number prefix information in the RCF message if the gatekeeper has accepted registration.Like this, terminal will know in time that above-mentioned number prefix changes, thereby in time adjusts local dialing pattern, realizes that smoothly new dialling named.Owing to also there is above-mentioned RRQ/RCF exchange between the gatekeeper of cascade, therefore, by increasing new number prefix information in the RCF message between the gatekeeper, the other side's gatekeeper just can the tabulation of real-time update cascade network gate-guard prefix by reading this RCF information.By upgrading this tabulation, can realize the gatekeeper's address location function with called number coupling, thereby directly determine called gatekeeper's address, transmit and resolve message.So just can solve the shortcoming that original cascade system loose couplings is brought.
Fig. 4 is for after employing the method for the invention, and cascade network gate-guard carries out the process schematic diagram that number is resolved.As shown in the drawing:
1. at first make a call, carry out number and resolve (analyzing called number obtains information such as called address), and send analysis request message to gatekeeper at the corresponding levels by terminal;
2. initiator's called party information is then responded in gatekeeper at the corresponding levels such as resolving called success; Under the situation that can't analyze called party information (non-local number), then basis is by gatekeeper's address information of the corresponding called prefixs coupling of other cascade network gate-guard prefix information searchings of the inside preservation of said method acquisition; As do not have the pair net rules and respond initiator's terminal parses failed message;
3. cascade network gate-guard is resolved to called party information, then called gatekeeper or terminal called address is sent it back original gatekeeper;
4. original gatekeeper transmits message and gives initiator's terminal after obtaining to resolve success message; Resolve failure and then respond the parsing failed message;
5. initiator's terminal is set up calling signaling message to the other side's transmission after obtaining to resolve successful called address information such as (or called place gatekeepers), finishes calling.
Fig. 5 implements signaling (comprising the renewal of number prefix) schematic flow sheet behind the said method for cascade network gate-guard.At first, the gatekeeper of cascade can upgrade each other new prefix information by the exchange of above-mentioned RRQ/RCF; Then, each communication terminal also can upgrade the dial plan of gatekeeper inside by the RRQ/RCF login mechanism.Like this, suppose that the gatekeeper has accepted registration, receiving terminal can send a RAS and accept request (ARQ) to the gatekeeper, and request enters network, is call distribution bandwidth and signaling model.If terminal is desired is non-local call, then can inquire about neighborhood gatekeeper's prefix information, obtains the gatekeeper address of coupling.At this moment, the gatekeeper of cascade can send the address resolution request by LRQ (LocationRequest) the message level-1 GK that makes progress, the upper level gatekeeper then utilizes LCF (Location Confirm) message to the answer that adds their confirmation of LRQ message, and provides the address resolution result.The gatekeeper is again by ACF (Admission Confirm) message, to the answer that adds their confirmation of above-mentioned ARQ message, and provides the address resolution result.For card number user, can also provide user balance and information such as long duration of call.
What need further specify is, number prefix or dial-plan information that the gatekeeper adds in the RCF that responds other gatekeepers or terminal, all (operator revises situations such as the gatekeeper's information of closing on, modification local dialing plan) just added and upgraded when this gatekeeper's this type of information changes, and do not add this type of information during operate as normal; Close on gatekeeper or terminal and have dial plan among the RCF, then upgrade local corresponding informance as finding.In addition, local gatekeeper upgrades the principle and the flow process of local terminal dial plan, with closing on the basic identical of renewal prefix information between the gatekeeper, only is in the RCF message of responding, and increases local dial plan and gets final product.
In the above embodiments, call setup all is assumed to be non-gatekeeper's pass-through mode in all processes and the flow process, as is gatekeeper's pass-through mode, does not have any conflict with method of the present invention, is omitted at this.
More than the method for reinforcing coupling mechanism between cascade network gate-guard of the present invention is had been described in detail, but obvious specific implementation form of the present invention is not limited thereto.For the those skilled in the art in present technique field, the various conspicuous change of under the situation of spirit that does not deviate from the method for the invention and claim scope it being carried out is all within protection scope of the present invention.
Claims (7)
1. the method for a reinforcing coupling mechanism between cascade network gate-guard is used between the gatekeeper of cascade or between gatekeeper and the terminal, it is characterized in that comprising the steps:
(1) in RAS message, increases the content that is used for assisted call control;
(2), communicate by RAS message mechanism between the gatekeeper of cascade or between gatekeeper and the terminal in the call initiationc stage;
(3) described gatekeeper or terminal are obtained the content that is used for assisted call control in described RAS message;
(4) described gatekeeper or terminal are carried out work according to the described content that is used for assisted call control.
2. the method for reinforcing coupling mechanism between cascade network gate-guard as claimed in claim 1 is characterized in that:
Described RAS message is the message RCF that succeeds in registration.
3. the method for reinforcing coupling mechanism between cascade network gate-guard as claimed in claim 1 is characterized in that:
Between the gatekeeper of cascade, the described content that is used for assisted call control is a number prefix information.
4. the method for reinforcing coupling mechanism between cascade network gate-guard as claimed in claim 1 is characterized in that:
Between gatekeeper connected to one another and terminal, the described content that is used for assisted call control is a dial plan.
5. as the method for any described reinforcing coupling mechanism between cascade network gate-guard in the claim 1 to 3, it is characterized in that:
The gatekeeper of described cascade is by the update number code word hat tabulation each other of the number prefix information in the RCF message.
6. as the method for any described reinforcing coupling mechanism between cascade network gate-guard in the claim 1 to 4, it is characterized in that:
When described gatekeeper changes in this gatekeeper's calling control content, in the RCF message of responding other gatekeepers or terminal, add corresponding calling control content.
7. the method for reinforcing coupling mechanism between cascade network gate-guard as claimed in claim 6 is characterized in that:
Described gatekeeper or terminal find have after the new calling control content in described RCF message, corresponding number prefix information or the dial plan that upgrades this locality.
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| CNB2005101129326A CN100382507C (en) | 2005-10-14 | 2005-10-14 | Method for reinforcing coupling mechanism between cascade network gate-guard |
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| CNB2005101129326A CN100382507C (en) | 2005-10-14 | 2005-10-14 | Method for reinforcing coupling mechanism between cascade network gate-guard |
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| CN100382507C true CN100382507C (en) | 2008-04-16 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000039965A1 (en) * | 1998-12-30 | 2000-07-06 | Ericsson Inc. | System and method for providing terminal mobility in h.323 systems |
| JP2003060836A (en) * | 2001-08-20 | 2003-02-28 | Ricoh Co Ltd | Network facsimile equipment |
| US20030046328A1 (en) * | 2001-09-05 | 2003-03-06 | Bon-Seuk Goo | Method for transmitting short message using internet phones and system therefor |
| CN1509059A (en) * | 2002-12-19 | 2004-06-30 | 华为技术有限公司 | Method for collecting called gate keeper information |
| CN1540952A (en) * | 2003-11-03 | 2004-10-27 | 中兴通讯股份有限公司 | Method for converting static addresses in multiple media system |
| CN1553667A (en) * | 2003-06-05 | 2004-12-08 | 中兴通讯股份有限公司 | Method for building call between multimedia apparatus |
-
2005
- 2005-10-14 CN CNB2005101129326A patent/CN100382507C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000039965A1 (en) * | 1998-12-30 | 2000-07-06 | Ericsson Inc. | System and method for providing terminal mobility in h.323 systems |
| JP2003060836A (en) * | 2001-08-20 | 2003-02-28 | Ricoh Co Ltd | Network facsimile equipment |
| US20030046328A1 (en) * | 2001-09-05 | 2003-03-06 | Bon-Seuk Goo | Method for transmitting short message using internet phones and system therefor |
| CN1509059A (en) * | 2002-12-19 | 2004-06-30 | 华为技术有限公司 | Method for collecting called gate keeper information |
| CN1553667A (en) * | 2003-06-05 | 2004-12-08 | 中兴通讯股份有限公司 | Method for building call between multimedia apparatus |
| CN1540952A (en) * | 2003-11-03 | 2004-10-27 | 中兴通讯股份有限公司 | Method for converting static addresses in multiple media system |
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