CN100525202C - A method of registration for the private network terminal to the gatekeeper based on the H.323 protocol - Google Patents
A method of registration for the private network terminal to the gatekeeper based on the H.323 protocol Download PDFInfo
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- CN100525202C CN100525202C CNB2004800430517A CN200480043051A CN100525202C CN 100525202 C CN100525202 C CN 100525202C CN B2004800430517 A CNB2004800430517 A CN B2004800430517A CN 200480043051 A CN200480043051 A CN 200480043051A CN 100525202 C CN100525202 C CN 100525202C
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Abstract
A method of registration for the private network terminal to the gatekeeper based on the H.323 protocol includes: perform the static network address translation for the H.323 proxy server on the network address translation device, the private network terminal initiates the registration request to the H.323 proxy server; the H.323 proxy distributes the listening port to the private network terminal and modifies the registration address in the registration request into the public network address of the H.323 proxy server and above distributed listening port; H.323 proxy server registers to the gatekeeper. The present invention uses the same public network IP address and different listening port to recognize the different private network terminal so that the registration address transmitted by the private network terminal via the same H.323 proxy server is different. Thereby the gatekeeper can distinguish the different private network terminals and the problem that multiple terminals corresponds to one public network IP address is solved.
Description
Technical field
The present invention relates to multi-media communication, specifically, relate to a kind of based on the multimedia terminal of agreement H.323 carrying out process registration.
Background technology
Flourish along with IP network broadband services in recent years, packet-based multimedia communications system standard H.323 agreement is widely used in video conference and the IP phone, and H.323 agreement is the Packet Based Network multimedia communication standard that the ITU-T of International Telecommunications Union formulates.Because the local area network (LAN) (private network) of oneself is all had in a lot of enterprises, in the privately owned IP address of the inner employing of local area network (LAN), when the terminal in the local area network (LAN) need be visited public network, general process network address translation (Network Address Translation is called for short NAT) equipment carries out the conversion of private net address and public network address.Network address translation NAT generally has static NAT, pooled NAT and three kinds of modes of port NAT, and wherein the static NAT mode is that private net address and public network address are carried out man-to-man conversion, allows the device access private network on the public network.And H.323 agreement itself is not considered the application of NAT, and the embedded characteristics in its address produce with NAT device conflicts, thereby has produced the problem of private network and public network intercommunication.
Current have a lot of methods to address the above problem, realization is passed through NAT device, wherein a kind of method is to adopt H.323 acting server, specifically: H.323 acting server is positioned at private network, on NAT device, adopt the static NAT mode to carry out network address translation, make the equipment of public network can visit H.323 acting server acting server H.323; Then the terminal in the private network H.323 acting server be appointed as the gatekeeper, be the equipment that end points H.323 provides services such as address resolution and Bandwidth Management; Terminal in the private network sends register requirement to acting server H.323, and H.323 acting server is registered to the gatekeeper of public network as terminal again then.Because H.323 acting server becomes the H.323 public network address of the static NAT of acting server to the IP address transition in the agreement H.323 in advance, therefore the IP address of the terminal that obtains on the public network gatekeeper is exactly the public network address of acting server H.323.
Employing as shown in Figure 1 is H.323 in the topology of networks schematic diagram of acting server, and H.323 terminal 1 in the private network and terminal 2 all are connected on the acting server, and H.323 acting server links to each other with NAT device, and NAT device then connects the gatekeeper in the public network.
Adopt H.323 acting server to the gatekeeper process registration mainly contain following two kinds:
1) H.323 adopting proprietary protocol to carry out communication between acting server and the public network gatekeeper, after H.323 acting server is received the registration message of private net terminal, initiate registration to the gatekeeper, in registration message, comprise non-standard message, the gatekeeper knows that according to non-standard message this registration message sends by acting server H.323, the gatekeeper writes down the terminal information that acting server H.323 sends then, if the terminal of public network terminal call through the registration of acting server H.323 arranged, then H.323 the gatekeeper just is directed to calling on the acting server.
2) after H.323 acting server is received the register requirement of private net terminal, the registered address in the registration message is modified as the H.323 address of acting server, then to the gatekeeper registers of public network.
In above-mentioned the 1st kind of method, H.323 contain non-standard message in the registration message that terminal is sent, this needs the gatekeeper and H.323 supports this non-standard message between the acting server, and the shortcoming of this method is conspicuous, can't solve the problem of interconnection and interflow.
In the 2nd kind of method, H.323 adopt H.323 standard agreement between acting server and the gatekeeper, H.323 H.323 the public network call address of acting server, the i.e. form of public network IP address+port are adopted in the registered address in the endpoint registration request of acting server forwarding.But this phenomenon can appear in this method, promptly all by same H.323 acting server be registered to public network gatekeeper's all corresponding same address of registration message, need the gatekeeper can realize only checking the terminal alias (terminal name) of registration like this, just add a new log-on message for non-existent terminal alias, like this gatekeeper go up different terminal alias just corresponding identical address.But in the system of practical application, the gatekeeper of some type need check the registered address when receiving log-on message, if it is identical that the gatekeeper finds the registered address, then think identical terminal, the gatekeeper just uses the log-on message of newly receiving and covers original log-on message, and promptly the gatekeeper of some type does not support the situation of the corresponding same registered address of a plurality of terminals.
Summary of the invention
Technical problem to be solved by this invention is to propose a kind of private net terminal based on agreement H.323 process registration to the gatekeeper, overcome in the prior art when the H.323 acting server that has carried out network address translation is registered to the gatekeeper, with the incompatible problem of dissimilar gatekeepers, and the situation of not supporting the corresponding same registered address of a plurality of terminals.
Core concept of the present invention is: on network address translation apparatus acting server is H.323 carried out the static network address conversion; Private net terminal is initiated register requirement to acting server H.323; H.323 acting server is to this private net terminal dynamic assignment listening port, and the H.323 public network IP address of acting server and the listening port of above-mentioned distribution are revised as in the registered address in the register requirement; H.323 acting server is registered to the public network gatekeeper.
Private net terminal based on agreement H.323 of the present invention is process registration to the gatekeeper, specifically comprises:
According to the agency's of acting server H.323 private net terminal number, set up the listening port pond; On network address translation apparatus, acting server is H.323 carried out the static network address conversion, the port in open listening port pond; H.323 on the acting server listening port pond is being provided with;
Private net terminal sends register requirement to acting server H.323;
H.323 after acting server is received the register requirement of private net terminal, judge whether this private net terminal is registration for the first time; If then in the listening port pond, choose a port that is not taken, and on this port, intercept by other terminal; If not, then use the listening port that has distributed for this private net terminal;
H.323 acting server with the registered address in the login request message be revised as acting server H.323 after through the static network address conversion public network address and H.323 acting server send login request message to the gatekeeper for the listening port of this private net terminal distribution;
The gatekeeper authenticates the register requirement of receiving; If authentication is passed through, then write down the log-on message of this private net terminal; The gatekeeper sends acknowledge message to acting server H.323, and H.323 acting server is received the log-on message of back this private net terminal of record, and sends acknowledge message to this private net terminal, and registration finishes;
If authentication is not passed through, then the gatekeeper sends refuse information to acting server H.323, and H.323 acting server receives that the back discharges the listening port of this private net terminal, and sends refuse information to this private net terminal, and registration finishes.
In said method, the port number in listening port pond equates with the number of the agency's of acting server H.323 private net terminal.
In said method, the registered address of private net terminal in the register requirement of H.323 acting server transmission is the private net address of this private net terminal and a listening port on this private net terminal.
In said method,, check then whether this private net terminal is registration for the first time if the authentication of the register requirement that the gatekeeper sends acting server is H.323 passed through; If then add the log-on message of this private net terminal; If this private net terminal was registered, then upgrade the log-on message of this private net terminal.
In the present invention, said method also comprises the initiatively step of cancel register of private net terminal, and specifically: private net terminal sends the message of cancel register to acting server H.323; H.323 be released to the listening port that this private net terminal distributes after acting server is received, send the message of cancel register then to the gatekeeper; After the gatekeeper receives deregister message, send the cancel register acknowledge message to acting server H.323; H.323 acting server is transmitted to private net terminal with the cancel register acknowledge message of receiving, cancel register finishes.
In the present invention, said method comprises that also the gatekeeper cancels the step of the registration of private net terminal, and specifically: the gatekeeper sends the message of cancellation private net terminal registration to acting server H.323; H.323 be released to the listening port of the private net terminal distribution that is cancelled registration after acting server is received, send the message of cancel register then to this private net terminal; After private net terminal is received the message of cancel register, send the affirmation message of cancel register to acting server H.323; H.323 acting server is given the gatekeeper with the affirmation forwards of cancel register, and the registration that the gatekeeper cancels private net terminal finishes.
The inventive method is by setting up a listening port pond, and adopt identical public network IP address to identify different private net terminals with different listening ports, H.323 the registered address that sends out of acting server is inequality through same to make different private net terminal, thereby make the gatekeeper can distinguish different private net terminals, solved the problem of the corresponding same public network IP address of a plurality of terminals; Simultaneously, the present invention is in the H.323 agreement that H.323 adopts standard between acting server and the public network gatekeeper, improved the H.323 interoperability between the acting server and dissimilar gatekeeper.
Description of drawings
Fig. 1 adopts the H.323 topology of networks schematic diagram of acting server;
Fig. 2 is the flow chart of register method of the present invention;
Fig. 3 is the flow chart of private net terminal active cancel register among the present invention;
Fig. 4 is the flow chart that the gatekeeper cancels the registration of private net terminal among the present invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
Fig. 1 adopts the H.323 schematic diagram of the network of acting server, illustrates in background technology.The inventive method also is based on network shown in Figure 1, and wherein H.323 H.323 the message between acting server and the public network gatekeeper adopt that standard agreement carries out alternately.
Core concept of the present invention is: in standard agreement H.323, the registered address of private net terminal is to adopt the private network IP address of this terminal to add that the mode of the listening port of this terminal represents, when private net terminal during to the registration of acting server H.323, to different private net terminal dynamic assignment listening ports, adopt the public network IP address of identical H.323 acting server to identify different private net terminals with different listening ports, make different private net terminal through same H.323 the registered address that sends out of acting server be different, thereby strengthened with different gatekeepers between the intercommunication performance.
The main process of the inventive method is: at first H.323 acting server is set up a listening port pond, H.323 after acting server is received the register requirement of private net terminal, from the listening port pond, take out a listening port, the registered address of private net terminal register requirement is revised as the public network IP address of acting server H.323 and is the listening port of this terminal distribution, register to the gatekeeper then, if registration failure, then H.323 acting server discharges the listening port of this private net terminal, uses during for other endpoint registration.
The concrete steps of the inventive method as shown in Figure 2.At first, H.323 acting server defines a listening port pond, i.e. one section port address according to need agency's private net terminal number; In one embodiment of the invention, the port number in listening port pond equates with the number of the agency's of acting server H.323 private net terminal.Then, on network address translation device acting server is H.323 carried out static NAT, obtain the H.323 public network IP address of acting server, open then listening port pond allows the H.323 acting server port of intercepting of the outer terminal access of NAT device; H.323 on the acting server listening port pond being provided with, start H.323 acting server then.Private net terminal sends register requirement to acting server H.323, and registered address wherein be a listening port on private net address and this private net terminal of this private net terminal.H.323 after acting server is received the register requirement of private net terminal, judge whether this private net terminal is registration for the first time; Concrete determination methods is to check the record that whether has this private net terminal on this acting server.If there is no the record of this private net terminal shows that then this private net terminal is registration for the first time, uses the listening port that has distributed for this private net terminal to intercept; If exist, show that then terminal is not registration for the first time, then chooses a port that is not taken by other private net terminal, and intercepts in the listening port pond on this port.H.323 acting server is made amendment to the login request message of receiving then, with the registered address be revised as the public network address of acting server H.323 and H.323 acting server send registration message then to the gatekeeper for the listening port that this private net terminal distributes.The gatekeeper authenticates after receiving the login request message of acting server H.323, if authentication by and this private net terminal be registration for the first time, then add the log-on message of this private net terminal; If the authentication by and this private net terminal registered, then upgrade the log-on message of this private net terminal.Last gatekeeper sends registration confirmation message to acting server H.323, and H.323 acting server is received the log-on message of back this private net terminal of record, and sends acknowledge message to this private net terminal, and registration finishes.If the gatekeeper does not pass through the authentication of login request message, then the gatekeeper sends registration reject message to acting server H.323, H.323 be released to the listening port that this private net terminal distributes after acting server is received, and send refuse information to this private net terminal, registration finishes.
As shown in Figure 3, private net terminal initiatively the step of cancel register comprise: private net terminal sends the message of cancel register to acting server H.323; H.323 be released to the listening port that this private net terminal distributes after acting server is received, send the message of cancel register then to the gatekeeper; After the gatekeeper receives deregister message, send the cancel register acknowledge message to acting server H.323; H.323 acting server is transmitted the cancel register acknowledge message of receiving to private net terminal, and so far, de-registration procedure finishes.
Gatekeeper as shown in Figure 4 cancels the process of private net terminal registration, comprising: the gatekeeper sends the message of cancel register private net terminal to acting server H.323; H.323 be released to the listening port of the registration private net terminal distribution that is cancelled after acting server is received, send the message of cancel register then to this private net terminal; After this private net terminal is received the deregister message of acting server H.323, send the cancel register acknowledge message to acting server H.323; H.323 acting server is transmitted after receiving the cancel register acknowledge message to the gatekeeper, and so far, the process that the gatekeeper cancels the private net terminal registration finishes.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (8)
1, a kind of private net terminal based on agreement H.323 process registration to the gatekeeper is characterized in that, comprising: on network address translation apparatus acting server is H.323 carried out the static network address conversion; Private net terminal is initiated register requirement to acting server H.323; H.323 acting server is to this private net terminal dynamic assignment listening port, and the H.323 public network IP address of acting server and the listening port of above-mentioned distribution are revised as in the registered address in the register requirement; H.323 acting server is registered to the public network gatekeeper.
2, the private net terminal based on agreement H.323 according to claim 1 process registration to the gatekeeper is characterized in that, specifically may further comprise the steps:
According to the agency's of acting server H.323 private net terminal number, set up the listening port pond; On network address translation apparatus, acting server is H.323 carried out the static network address conversion, the port in open listening port pond; H.323 on the acting server listening port pond is being provided with;
Private net terminal sends register requirement to acting server H.323;
H.323 after acting server is received the register requirement of private net terminal, judge whether this private net terminal is registration for the first time; If then in the listening port pond, choose a port that is not taken, and on this port, intercept by other terminal; If not, then use the listening port that has distributed for this private net terminal;
H.323 acting server with the registered address in the login request message be revised as acting server H.323 after through the static network address conversion public network address and H.323 acting server send login request message to the gatekeeper for the listening port of this private net terminal distribution;
The gatekeeper authenticates the register requirement of receiving; If authentication is passed through, then write down the log-on message of this private net terminal; The gatekeeper sends acknowledge message to acting server H.323, and H.323 acting server is received the log-on message of back this private net terminal of record, and sends acknowledge message to this private net terminal, and registration finishes;
If authentication is not passed through, then the gatekeeper sends refuse information to acting server H.323, and H.323 acting server receives that the back discharges the listening port of this private net terminal, and sends refuse information to this private net terminal, and registration finishes.
3, the private net terminal based on agreement H.323 according to claim 2 process registration to the gatekeeper, it is characterized in that, describedly judge that whether private net terminal is that process registration is specifically for the first time: check the record that whether has this private net terminal on this acting server, if there is no the record of this private net terminal shows that then this private net terminal is registration for the first time; If exist, show that then this private net terminal is not registration for the first time.
4, the private net terminal based on agreement H.323 according to claim 2 process registration to the gatekeeper is characterized in that, the port number in described listening port pond equates with the number of acting server agency's private net terminal H.323.
5, the private net terminal based on agreement H.323 according to claim 1 and 2 process registration to the gatekeeper, it is characterized in that the registered address of described private net terminal in the register requirement of H.323 acting server transmission is the private net address of this private net terminal and a listening port on this private net terminal.
6, the private net terminal based on agreement H.323 according to claim 2 process registration to the gatekeeper, it is characterized in that, the authentication of the register requirement that described gatekeeper sends acting server H.323 is by the log-on message of back this private net terminal of record, specifically comprise:, check then whether this private net terminal is registration for the first time if the authentication of the register requirement that the gatekeeper sends acting server is H.323 passed through; If then add the log-on message of this private net terminal; If this private net terminal was registered, then upgrade the log-on message of this private net terminal.
7, the private net terminal based on agreement H.323 according to claim 1 and 2 process registration to the gatekeeper, it is characterized in that, described method also comprises the initiatively step of cancel register of private net terminal, and specifically: private net terminal sends the message of cancel register to acting server H.323; H.323 be released to the listening port that this private net terminal distributes after acting server is received, send the message of cancel register then to the gatekeeper; After the gatekeeper receives deregister message, send the cancel register acknowledge message to acting server H.323; H.323 acting server is transmitted to private net terminal with the cancel register acknowledge message of receiving.
8, the private net terminal based on agreement H.323 according to claim 1 and 2 process registration to the gatekeeper, it is characterized in that, method comprises that also the gatekeeper cancels the step of the registration of private net terminal, and specifically: the gatekeeper sends the message of cancellation private net terminal registration to acting server H.323; H.323 be released to the listening port of the private net terminal distribution that is cancelled registration after acting server is received, send the message of cancel register then to this private net terminal; After private net terminal is received the message of cancel register, send the affirmation message of cancel register to acting server H.323; H.323 acting server is given the gatekeeper with the affirmation forwards of cancel register.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100428716A CN1299476C (en) | 2004-05-28 | 2004-05-28 | Method for H.323 agent server to register on gatekeeper from terminals after being agent of NAT |
| CN200410042871.6 | 2004-05-28 | ||
| PCT/CN2004/000890 WO2005117346A1 (en) | 2004-05-28 | 2004-08-02 | A method of registration for the private nerwork terminal to the gatekeeper based on the h.323 protocol |
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| CN1954549A CN1954549A (en) | 2007-04-25 |
| CN100525202C true CN100525202C (en) | 2009-08-05 |
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| CNB2004800430517A Expired - Fee Related CN100525202C (en) | 2004-05-28 | 2004-08-02 | A method of registration for the private network terminal to the gatekeeper based on the H.323 protocol |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102984254A (en) * | 2011-11-28 | 2013-03-20 | 微软公司 | Reachability of role embodiment in data center |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101822026B (en) * | 2007-09-28 | 2013-08-28 | 西门子企业通讯有限责任两合公司 | Method and device for establishing connection between packet-oriented communication terminals through network address translation unit |
| CN101442447B (en) * | 2007-11-20 | 2011-05-11 | 中兴通讯股份有限公司 | Method for implementing authentication proxy in NGN listen-in system and listen-in gateway |
| CN106488297B (en) * | 2016-10-21 | 2019-01-22 | 广州酷狗计算机科技有限公司 | A kind of method and apparatus of display image data |
| CN113038592B (en) * | 2019-12-24 | 2023-05-05 | 阿里巴巴集团控股有限公司 | Communication method and device between Internet of things devices |
| CN111465001B (en) * | 2020-04-01 | 2023-05-02 | 中国联合网络通信集团有限公司 | Registration method and device |
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| WO2002089415A1 (en) * | 2001-04-26 | 2002-11-07 | N'ser Community Inc. | Method for communication audio and video data in multimedia communication system using h.323 protocol |
| CN1464721A (en) * | 2002-06-19 | 2003-12-31 | 华为技术有限公司 | Transmission calling method for multimedia communication |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1216657A (en) * | 1996-04-24 | 1999-05-12 | 北方电讯有限公司 | Internet protocol filter |
| WO2002089415A1 (en) * | 2001-04-26 | 2002-11-07 | N'ser Community Inc. | Method for communication audio and video data in multimedia communication system using h.323 protocol |
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| CN102984254A (en) * | 2011-11-28 | 2013-03-20 | 微软公司 | Reachability of role embodiment in data center |
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