CN100502368C - Method for building call between multimedia apparatus - Google Patents
Method for building call between multimedia apparatus Download PDFInfo
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- CN100502368C CN100502368C CNB031318185A CN03131818A CN100502368C CN 100502368 C CN100502368 C CN 100502368C CN B031318185 A CNB031318185 A CN B031318185A CN 03131818 A CN03131818 A CN 03131818A CN 100502368 C CN100502368 C CN 100502368C
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- gatekeeper
- address
- private network
- network device
- calling
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Abstract
This invention is relative to a method for setting up calling among the multimedia devices, specially setting up calling among the communication devices between private network and public network. It includes following steps: at private network builds the H.225 RAS (Registration, Adimission and Status) channel opening into the GK (Gatekeeper) of public network. The private device sends survival login request to the GK of public network according to fixed time, keeps the H.225 RAS channel; when the private device is called, GK transmits the private message to inform the private device through H.225 RAS; the private network device calls the public network device to set up calling. This invention uses the H.225 RAS channel defined in protocol itself to enable the private network devices, solves the problem that is after the network address switches the devices the multi media device can be called by public net devices.
Description
Technical field
The present invention relates to a kind of method of calling out that realizes setting up between the multimedia equipment, belong to be implemented in and set up the method for calling out between private network and the public network multimedia equipment, be specifically related to when multimedia equipment is after network address translation apparatus, how the multimedia equipment of public network calls out the method for the multimedia equipment of private network.
Background technology
At present, because public network address is limited, multi-media communication equipment such as multimedia terminal, MCU (multipoint controller), gateway adopt private ip addresses mostly in the enterprise network, private network device is by network address translation apparatus (NAT) visit public network, in multimedia communication system, equipment need be done caller or called, and that the multimedia equipment after the network address translation apparatus can't be done is called, the development that has therefore hindered multi-media communication with popularize.
Multimedia equipment in the IP network generally is based on agreement H.323, and the multimedia equipment after the network address translation apparatus can utilize the equipment in the public network to realize doing called function, and main method has 2 classes:
1. the equipment after the network address translation apparatus, sees through this TCP passage and realizes calling when device call once starting shooting and public network equipment is set up the TCP passage.
2. the UDP passage set up with public network equipment of the equipment utilization after the network address translation apparatus when device call, sees through this UDP passage and realizes calling out, and this technology is called callback (Callback).
The shortcoming of first method is: private network device and public network equipment are forever set up extra TCP passage, and comparing with UDP needs to consume more system resources.
The advantage of second method is: do not utilized existing UDP passage, additionally do not set up the TCP passage, simply and not consume system resources.The shortcoming of second method is to have revised call flow, has adopted non-standard message, and interoperability is relatively poor.
Summary of the invention
The object of the present invention is to provide a kind of the realization to set up the method for calling out between the multimedia equipment, belong to improvement above-mentioned second method.
The present invention is achieved in that
A kind of realization set up the method for calling out between the multimedia equipment, comprise the steps:
First step, private network device are established to the H.225 RAS passage of GK of public network according;
Second step, private network device regularly send the survival register requirement to GK of public network according, keep H.225RAS passage;
When third step, GK were received the address resolution request, GK sent the address of oneself as called IP address;
The 4th step, GK call accepted signaling, and send the call release request, to hang up calling;
The 5th step, GK sends NSM message to private network device, and private network device receives that the back sends NSM to GK and answers message;
The 6th step, private network device is according to normal communication flow process callback caller equipment.
Described first step further comprises:
After GK receives register requirement from private network device, address of relatively receiving and port whether with RRQ in full accord, if inconsistent, think that this equipment is after network address translation apparatus;
GK is with public network address and port address and the port as endpoint registration RAS, and is set the registration time-to-live keeps a UDP passage less than network address translation apparatus time in the RCF response message, be generally 5 minutes, and required private network device timed sending registration to keep request.
Private network device in described second step regularly sends register requirement, to keep H.225 RAS passage according to the registration time-to-live that provides among the GK.
Described third step further comprises:
During caller device call private network device, if caller equipment and private network device are registered on same GK, GK can receive the ARQ request, GK when sending the ACF answer the address of GK as called IP address;
If caller equipment and private network device are not registered on same GK, GK can receive the LRQ request, GK when sending the LCF answer the address of GK as called IP address.
Described private network device is according to normal communication flow process callback caller equipment, to set up Q931 and passage H.245.
If first to the 6th step, at short notice 2 times unsuccessful, when then calling out for the 3rd time, activated terminals no longer is to avoid repetitive cycling.
NSM extension of message in described the 5th step adopts the nonStandardData field of the NonStandardMessage in the RAS message H.225 to come transmission information:
--non-standard message (NSM) expansion
NSMsNonStandardData::＝SEQUENCE
{
CommandType NatNSMCommand,--the mode of order
Calling AliasAddress OPTIONAL,--the caller another name
srcCallSignalAddress TransportAddress?OPTIONAL，
--calling address, another name must have one with the address
...，
Octet4 BearerOctet4,--the bearerCapability.octet4 among the Setup
}
BearerOctet4::＝SEQUENCE
{
transferMode INTEGER(0..3)，
informationTransferRate?INTEGER(0..31)，
rateMultiplier INTEGER(0..127)OPTIONAL，
}
NatNSMCommand::＝CHOICE
{
InviteRequest NULL,--activate request
InviteReply NULL,--activate and answer
...，
}；
During callback, GK will give the callee bearerCapability.octet4 field among the calling party Setup in NSM message, be used for transmitting the call-rate parameter.
Effect of the present invention is: utilize the UDP passage of agreement regulation itself to activate private network device, solving network address translation apparatus multimedia equipment afterwards can be overcome the networking weakness of multimedia communication system by the technical problem of public network device call.
Description of drawings
Fig. 1 is the realization call network address-translating device of the present invention flow process of multimedia equipment afterwards.
Embodiment
As shown in Figure 1, the method for call setup of the present invention specifically comprises the steps:
The first step, private network device sends register requirement to GK, sets up H.225 RAS passage.
After GK receives register requirement from private network device, address of relatively receiving and port whether with RRQ in full accord, if inconsistently think that this equipment is after network address translation apparatus.GK need be public network address and port address and the port as the registration RAS of terminal, and is set the registration time-to-live keeps a UDP passage less than network address translation apparatus time in the RCF response message, be generally 5 minutes, and required private network device timed sending registration to keep request.
In second step, private network device regularly sends register requirement, to keep H.225 RAS passage according to the registration time-to-live that provides among the GK.
The 3rd step, when caller device call private network device, if caller equipment and private network device are registered on same GK, GK can receive the ARQ request, GK when sending ACF and answer the address of GK as called IP address, if caller equipment and private network device are not registered on same GK, GK can receive the LRQ request, GK when sending the LCF answer the address of GK as called IP address.
The 4th step, GK call accepted signaling (Setup), and send call release request (ReleaseComplete) immediately, to hang up calling, former because " newConnectionNeeded ".
In the 5th step, GK sends NSM (non-standard message) by RAS passage H.225 to private network device, and private network device receives that the back sends NSM to GK and answers message.
In the 6th step, private network device is according to normal communication flow process callback caller equipment.Set up Q931 and passage H.245.
If in the said process short time 2 times unsuccessful, when then calling out for the 3rd time, no longer activated terminals is avoided repetitive cycling.
NSM extension of message in the 5th step adopts the nonStandardData field of the NonStandardMessage in the RAS message H.225 to come transmission information, the data field is filled in the NSMsNonStandardData value in the following ASN.1 description, adopts the PER coded system of ASN.1.During callback, GK will give the callee bearerCapability.octet4 field among the calling party Setup in NSM message, be used for transmitting the call-rate parameter.
--non-standard message (NSM) expansion
NSMsNonStandardData::＝SEQUENCE
{
CommandType NatNSMCommand,--the mode of order
Calling AliasAddress OPTIONAL,--the caller another name
srcCallSignalAddress?TransportAddress?OPTIONAL，
--calling address, another name must have one with the address
...，
Octet4 BearerOctet4,--the bearerCapability.octet4 among the Setup
}
BearerOctet4::＝SEQUENCE
{
transferMode INTEGER(0..3)，
informationTransferRate?INTEGER(0..31)，
...，
rateMultiplier INTEGER(0..127)OPTIONAL，
}
NatNSMCommand::＝CHOICE
{
InviteRequest NULL,--activate request
InviteReply NULL,--activate and answer
...，
}。
Claims (7)
1. realize setting up the method for calling out between the multimedia equipment for one kind, comprise the steps:
First step, private network device are established to public network gatekeeper's H.225 registration permission and status message passage;
Second step, private network device regularly sends the survival register requirement to the public network gatekeeper, and keeping H.225, registration allows and the status message passage;
Third step, when the gatekeeper received the address resolution request, the gatekeeper sent the address of oneself as called IP address;
The 4th step, gatekeeper's call accepted signaling, and send the call release request, to hang up calling;
The 5th step, the gatekeeper sends non-standard message to private network device, sends non-standard message after private network device is received to the gatekeeper and answers message;
The 6th step, private network device is according to normal communication flow process callback caller equipment.
Wherein, described first step further comprises:
After the gatekeeper receives register requirement from private network device, address of relatively receiving and port whether with register requirement in full accord, if inconsistent, think that this equipment is after network address translation apparatus;
The gatekeeper registers address and the port that allows with status message with public network address and port as endpoint registration, and be set the registration time-to-live less than the time that network address translation apparatus keeps a User Datagram Protoco (UDP) passage in the accreditation verification response message, require private network device timed sending registration to keep request.
2. a kind of according to claim 1 the realization set up the method for calling out between the multimedia equipment, it is characterized in that: the described time-to-live is 5 minutes.
3. a kind of as claimed in claim 1 or 2 method that realizes setting up between the multimedia equipment calling, it is characterized in that: the private network device in described second step is according to the registration time-to-live that provides among the gatekeeper, regularly send register requirement, registration allows and the status message passage to keep H.225.
4. a kind of according to claim 1 the realization set up the method for calling out between the multimedia equipment, it is characterized in that: described third step further comprises:
During caller device call private network device, if caller equipment and private network device are registered on same gatekeeper, the gatekeeper can receive the permission request message, and the gatekeeper is sending when allowing to confirm answer gatekeeper's address as called IP address;
If caller equipment and private network device are not registered on same gatekeeper, the gatekeeper can receive position requests, the gatekeeper when sending the location confirmation answer gatekeeper's address as called IP address.
5. a kind of according to claim 1 realize between the multimedia equipment set up the method for calling out, and it is characterized in that: described the 6th step, private network device be according to normal communication flow process callback caller equipment, to set up Q931 and passage H.245.
6. a kind of according to claim 1 the realization set up the method for calling out between the multimedia equipment, it is characterized in that:
If first to the 6th step, 2 times unsuccessful, when then calling out for the 3rd time, activated terminals no longer is to avoid repetitive cycling.
7. a kind of according to claim 1 the realization set up the method for calling out between the multimedia equipment, it is characterized in that:
Non-standard message expansion in described the 5th step adopts the non-standard data field of the non-standard information in H.225 registration permission and the status message to come transmission information:
--the non-standard message expansion
NSMsNonStandardData::＝SEQUENCE
{
CommandType NatNSMCommand,--the mode of order
Calling AliasAddress OPTIONAL,--the caller another name
srcCallSignalAddress TransportAddress?OPTIONAL，
--calling address, another name must have one with the address
..，
Octet4 BearerOctet4,--the bearerCapability.octet4 among the Setup
}
BearerOctet4 ::＝SEQUENCE
{
transferMode INTEGER(0..3)，
informationTransferRate?INTEGER(0..31)，
..，
rateMultiplier INTEGER(0..127)OPTIONAL，
}
NatNSMCommand ::＝CHOICE
{
InviteRequest NULL,--activate request
InviteReply NULL,--activate and answer
...，
}；
During callback, the gatekeeper will give the callee bearerCapability.octet4 field among the calling party Setup in non-standard message, be used for transmitting the call-rate parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031318185A CN100502368C (en) | 2003-06-05 | 2003-06-05 | Method for building call between multimedia apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031318185A CN100502368C (en) | 2003-06-05 | 2003-06-05 | Method for building call between multimedia apparatus |
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| CN1553667A CN1553667A (en) | 2004-12-08 |
| CN100502368C true CN100502368C (en) | 2009-06-17 |
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|---|---|---|---|
| CNB031318185A Expired - Fee Related CN100502368C (en) | 2003-06-05 | 2003-06-05 | Method for building call between multimedia apparatus |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7688792B2 (en) * | 2005-04-21 | 2010-03-30 | Qualcomm Incorporated | Method and apparatus for supporting wireless data services on a TE2 device using an IP-based interface |
| CN100382507C (en) * | 2005-10-14 | 2008-04-16 | 北京佳讯飞鸿电气股份有限公司 | Method for reinforcing coupling mechanism between cascade network gate-guard |
| CN100550846C (en) * | 2006-10-20 | 2009-10-14 | 华为技术有限公司 | The method and system of call release when multimedia business intercommunication under separation structure |
| CN101803357A (en) * | 2007-09-17 | 2010-08-11 | 朗讯科技公司 | Method, apparatus and system for multimedia communication |
| CN101478505B (en) * | 2009-01-23 | 2011-09-07 | 建汉科技股份有限公司 | Method for establishing network system and network connection between network appliances of different private networks |
| CN111867057B (en) * | 2019-04-29 | 2023-10-20 | 华为技术有限公司 | Communication method, device and system |
| CN112153109B (en) * | 2020-08-14 | 2023-09-29 | 深圳市捷视飞通科技股份有限公司 | Method, device, computer equipment and storage medium for establishing communication connection |
| CN113315808B (en) * | 2021-04-21 | 2022-09-30 | 深圳市捷视飞通科技股份有限公司 | Network address matching method and device, computer equipment and storage medium |
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