CN101754050A - Integrating high- timeliness call connecting and controlling method - Google Patents
Integrating high- timeliness call connecting and controlling method Download PDFInfo
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- CN101754050A CN101754050A CN201010301030A CN201010301030A CN101754050A CN 101754050 A CN101754050 A CN 101754050A CN 201010301030 A CN201010301030 A CN 201010301030A CN 201010301030 A CN201010301030 A CN 201010301030A CN 101754050 A CN101754050 A CN 101754050A
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Abstract
The invention discloses an integrating high-timeliness call connecting and controlling method, through analyzing the flow relations and characteristics of calling procedure, operational control, media consultation, key distribution and resource reservation, and the procedures are concurrently processed, through the integrating signaling procedure, the call connecting and controlling flow is optimized, the timeliness of the call is ensured. The advantages of the invention are as follows: the integrating high-timeliness call connecting and controlling method solves the problems that the signaling interaction of the calling course generated by safe call system of traditional overlay mode is too long, the feeling of the user is not good, and the confidentiality call is not easy to popularize. Through the integrating call connecting and controlling method, the building time of call is greatly shortened, the time delay of call building between five nodes is smaller than 3 seconds, and good user service experience is provided.
Description
Technical field
Invention relates to field of telephone communication, particularly relates to a kind of integrated high-timeliness call connecting and controlling method.
Background technology
Call delay is basic, the most most crucial performance index of assessment communication equipment in the telephonic communication system, embodies the technical merit of system equipment realization aspect.Call delay is meant the time-delay (from having dialed number the time of called terminal ringing) of the whole signaling processing procedure of set up calling out, and relates to influencing each other of each signaling Control Parameter, comprises from each equipment of terminal to network.Call delay is made up of fixed delay and variable time delay: fixed delay is the set time that is spent in Signalling exchange, transmission, the processing procedure; Variable time delay is then by the randomness that makes a call, and is relevant such as the states such as busy spare time of system.By optimizing network and system architecture, improve processor efficiency, strengthen that network port bandwidth etc. can reduce to transmit, the time delay of processing and situation such as concurrent, but can't resolve the time delay of the most basic Signalling exchange.
Conventional telecommunication network just develops towards the direction that merges, and arrives IMS (IP Multimedia Subsystem, IP Multimedia System) again from PSTN (Public Switched Telephone Network, public telephone network) to soft switch.No matter be which, call delay all is one of key element of network availability in stage.So same in safe and secret calling, except finishing basic calling control, professional control, media negotiation and resource reservation, also need to carry out the working key distribution in the calling procedure.How reducing call delay, improve the good impression that the user uses, is to need the urgent problem that solves.
In PSTN, because Circuit-switched characteristic, in calling procedure, finished two-way resource reservation by the calling party, adopt identical type because professional and coding etc. are basic in addition,, also do not need independent media negotiation so business is controlled and only simply handled at Calling Side, so, in PSTN, call delay is very little, and user experience is good.Also bring corresponding shortcoming when certainly, Circuit-switched characteristic is brought advantage: class of business is few, limited bandwidth, the wasting of resources, multiplexing low or the like.
On soft switch and IMS, be divided into different aspects and control owing to call out control, professional control and resource reservation, brought good extensibility, can be flexibly, organization network and provide professional easily.But because a plurality of processes and repeatedly caused the call signaling process long alternately.Usually the user is in 8 seconds a receptible call setup stand-by period, but the process of superposing type causes period of reservation of number long easily.
In soft switch and IMS, all adopt conversation initialized protocol (SIP) as call control protocol.SIP has realized the basic procedure that session is set up, but not support media negotiation of SIP itself is carried the negotiation that Session Description Protocol (SDP) is finished media parameter in relevant sip message.SDP is a kind of Session Description Protocol that IETF formulates, and can transmit with various transportation protocols.In soft switch and IMS system, setting up media transmission channel is to belong to resource reservation in addition.Finish for session both sides resource reservation before guaranteeing called off-hook, IETF has proposed a kind of support method-Precondition mechanism, and it all has associated description in Session Initiation Protocol and SDP agreement.Basic procedure is as shown in Figure 1:
1) caller is after the dialing of receiving the user, to called sending " INVITE (medium that SDP wishes and coding) "; After called the receiving, send " 183 (medium and coding that SDP supports) " and turn back to caller;
2) caller is to called sending " PRACK ", and caller is given in called answer " 200 OK (PRACK) ", and carries out resource reservation simultaneously;
3) caller is carried out behind the resource reservation to called sending " UPDATE (SDP is finished in reservation) ", and called receiving, and after resource reservation finishes, send " 200OK (SDP) ", " 180 " ring to caller sent ring back tone simultaneously, and the signal user has to call out and enters;
4) after caller is received, ring-back, and to called sending " PRACK ", called answer " 200 OK (INVITE) ";
5) behind called subscriber's off-hook, called generation " 200 OK (INVITE) " is to caller, and " ACK " returned in caller, enters talking state afterwards.
In safe and secret calling, adopt the mode of " words one are close ", i.e. the working key of each conversation all will be redistributed, and typical key distribution flow process is initiated by caller, and flow process is as shown in Figure 2.
In the network of routine, finishing safe and secret calling all is to adopt the mode of stack to carry out calling procedure and key distribution, be to carry out the key distribution process after calling procedure finishes, like this, a typical call signaling step needs 2 steps of 11 steps of calling procedure and key distribution, amounts to the Signalling exchange of 13 steps.When network size is bigger, complex circuit is during if any wireless channels such as satellites, and whole call delay is just too big.
Summary of the invention
The present invention has overcome shortcoming of the prior art, a kind of integrated high-timeliness call connecting and controlling method is provided, by analysis to the flow process of calling procedure, professional control, media negotiation, key distribution and resource reservation relation and characteristic, with these process concurrent processing, by integrated signaling process, optimize and call out the connection control flow, ensure call out ageing.
Technical scheme of the present invention is as follows: a kind of integrated high-timeliness call connecting and controlling method, calling connect control flow and are:
1) caller is carried out the judgement and the key distribution request of service request after the dialing of receiving the user, service request by with obtain working key after, produce " call request " and carry the media negotiation parameter and working key mails to called end;
2) called receive call request after, carry out service request and judge and obtain working key, if can admit this calling, then return " session responds " and carry medium and working key result, turn back to caller; Simultaneously carry out reverse resource reservation called;
3) after " session responds " received in caller, carry out the forward resource reservation; After the success of forward resource reservation, " be ready to complete notice " for called initiation;
4) called receiving " is ready to complete notice " if " success response " then returned in oppositely also success of resource reservation of back, otherwise returns " success response " again after waiting until reverse resource reservation success; Send ring back tone simultaneously;
5) behind called subscriber's off-hook, called generation " success response " is to caller, and " call out and confirm " returned in caller, enters the secret telephony state afterwards.
Compared with prior art, advantage of the present invention is: by analyzing the flow process relation and the characteristic of calling procedure, professional control, media negotiation, key distribution and resource reservation, as far as possible with some process concurrent processing, reduce serial process, ensure the integrated treatment time.
Receive the laggard industry affair of call request request judgement and trigger key distribution in caller, in the called request of making a call, carry media negotiation and working key information; Trigger resource reservation after this business of called approval.Professional control and media negotiation are finished in calling procedure synchronously; After key distribution and resource reservation were finished, the called ring of sending was given in call control procedure, promptly enters the secret telephony attitude behind the called off-hook.In call flow, processes such as integrated calling control, professional control, media negotiation, key distribution and resource reservation walk abreast multinomial function course and carry out, and improve treatment efficiency, ensure high-timeliness.
This integrated high-timeliness call connecting and controlling method has solved that the calling procedure Signalling exchange that the safety call mechanism of traditional overlay model produces is long, and it is bad that the user experiences, and secret telephony is difficult for the problem promoted.
By integrated call connecting and controlling method, shortened call set-up time greatly, less than 3 seconds, provide good customer service to experience at 5 internodal calling establishment time delays.
Description of drawings
The present invention will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is that the SIP with Precondition mechanism of prior art calls out the connection schematic flow sheet;
Fig. 2 is a typical working key distribution flow schematic diagram in the safe and secret calling;
Fig. 3 is that calling of the present invention connects the control flow schematic diagram;
Fig. 4 is an integrated calling connection protocol framework schematic diagram of the present invention;
Fig. 5 communication entity relational model of the present invention schematic diagram.
Embodiment
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
A kind of integrated high-timeliness call connecting and controlling method with reference to agreements such as SIP, ISUP call control protocol, SDP media negotiation, RSVP resource reservation, key distribution, is drafted and is called out the connection control flow, as shown in Figure 3:
1) caller is carried out the judgement and the key distribution request of service request after the dialing of receiving the user, because business and key distribution are all carried out in this locality, two parts can parallel processing.Service request by with obtain working key after, produce " call request " and carry the media negotiation parameter and working key mails to called end.
2) called receive call request after, carry out service request and judge and obtain working key, can admit this calling, then return " session responds " and carry medium and working key result, turn back to caller.Simultaneously carry out reverse resource reservation called.
3) after " session responds " received in caller, carry out the forward resource reservation.After the success of forward resource reservation, " be ready to complete notice " for called initiation.
4) called receiving " is ready to complete notice " if " success response " then returned in oppositely also success of resource reservation of back, otherwise returns " success response " again after waiting until reverse resource reservation success.Send ring back tone simultaneously.The signal user has calling to enter.
5) behind called subscriber's off-hook, called generation " success response " is to caller, and " call out and confirm " returned in caller, enters the secret telephony state afterwards.
According to Session Initiation Protocol, connect control flow according to above-mentioned calling, formulate integrated calling connection protocol CCLP (CompositiveCall Link Protocol), comprise related command and request, and the message parameter of each agreement.The CCLP protocol model is as shown in Figure 4: comprise CCLP terminal, CCLP switch and CCLP edge switch, CCLP terminal and CCLP switch, all realize communication between CCLP switch and the CCLP edge switch by the CCLP agreement, realize communication by RSVP between CCLP switch and the CCLP edge switch, the SGW module of CCLP edge switch adopts the CCLP agreement to carry out communication.
In order to realize strict calling control, CCLP need carry out interaction protocol in CCLP terminal and the strictness of CCLP inter-exchange, the CCLP terminal room mutual CCLP agreement that passes on.Communication entity concerns that as shown in Figure 5 wherein: the CCLP terminal refers to each Terminal Type of all operation CCLP agreements; The CCLP switch refers to move the switch of CCLP agreement.
In the formulation of CCLP agreement, reach compression effectiveness by adjusting protocol code, reduce the transmission time; Adjust address information, reduce the routing inquiry step.
Session Initiation Protocol is the text protocol that adopts the UTF-8 character set to encode.Message format is by an initial row, some stature fields, and an optional message body is formed.To between the 2K byte even more, protocol overhead is bigger in the hundreds of byte for general message-length.The CCLP agreement by binary coding, in tens bytes, has reduced time overhead with the protocol message compresses in length.
By with Subscriber Number E.164 numbering as address information, standard Subscriber Number numbering, reach the through street by effect, dispense processes such as address information translation.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (1)
1. integrated high-timeliness call connecting and controlling method is characterized in that: call out and connect control flow and be:
1) caller is carried out the judgement and the key distribution request of service request after the dialing of receiving the user, service request by with obtain working key after, produce " call request " and carry the media negotiation parameter and working key mails to called end;
2) called receive call request after, carry out service request and judge and obtain working key, if can admit this calling, then return " session responds " and carry medium and working key result, turn back to caller; Simultaneously carry out reverse resource reservation called;
3) after " session responds " received in caller, carry out the forward resource reservation; After the success of forward resource reservation, " be ready to complete notice " for called initiation;
4) called receiving " is ready to complete notice " if " success response " then returned in oppositely also success of resource reservation of back, otherwise returns " success response " again after waiting until reverse resource reservation success; Send ring back tone simultaneously;
5) behind called subscriber's off-hook, called generation " success response " is to caller, and " call out and confirm " returned in caller, enters the secret telephony state afterwards.
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| CN101754050A true CN101754050A (en) | 2010-06-23 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012048608A1 (en) * | 2010-10-13 | 2012-04-19 | 中兴通讯股份有限公司 | Method, system and mobile station for call confirmation |
| CN105635039A (en) * | 2014-10-27 | 2016-06-01 | 阿里巴巴集团控股有限公司 | Network safety communication method and device |
| CN106658752A (en) * | 2015-11-03 | 2017-05-10 | 中国移动通信集团公司 | Communication resource confirmation method, device and system |
| CN111193894A (en) * | 2018-11-14 | 2020-05-22 | 中兴通讯股份有限公司 | Method and device for establishing data transmission channel, storage medium and system |
-
2010
- 2010-02-02 CN CN 201010301030 patent/CN101754050B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012048608A1 (en) * | 2010-10-13 | 2012-04-19 | 中兴通讯股份有限公司 | Method, system and mobile station for call confirmation |
| CN105635039A (en) * | 2014-10-27 | 2016-06-01 | 阿里巴巴集团控股有限公司 | Network safety communication method and device |
| CN105635039B (en) * | 2014-10-27 | 2019-01-04 | 阿里巴巴集团控股有限公司 | A kind of secure communication of network method and communication device |
| US10419409B2 (en) | 2014-10-27 | 2019-09-17 | Alibaba Group Holding Limited | Method and apparatus for secure network communications |
| CN106658752A (en) * | 2015-11-03 | 2017-05-10 | 中国移动通信集团公司 | Communication resource confirmation method, device and system |
| CN106658752B (en) * | 2015-11-03 | 2020-04-14 | 中国移动通信集团公司 | Communication resource confirmation method, device and system |
| CN111193894A (en) * | 2018-11-14 | 2020-05-22 | 中兴通讯股份有限公司 | Method and device for establishing data transmission channel, storage medium and system |
| WO2020098712A1 (en) * | 2018-11-14 | 2020-05-22 | 中兴通讯股份有限公司 | Method and device for establishing data transmission channel, storage medium, and system |
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| CN101754050B (en) | 2012-05-23 |
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Inventor after: Kang Min Inventor after: Wang Wensheng Inventor after: Zhou Jun Inventor after: Yang Xiaoliang Inventor after: Wang Juan Inventor after: Wang Qiang Inventor before: Kang Min Inventor before: Wang Wensheng Inventor before: Zhou Jun Inventor before: Yang Xiaoliang Inventor before: Wang Juan |
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