CN104486293B - Media consulation method based on network and terminal capability under Wireless VoIP environment and system - Google Patents
Media consulation method based on network and terminal capability under Wireless VoIP environment and system Download PDFInfo
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- CN104486293B CN104486293B CN201410683595.5A CN201410683595A CN104486293B CN 104486293 B CN104486293 B CN 104486293B CN 201410683595 A CN201410683595 A CN 201410683595A CN 104486293 B CN104486293 B CN 104486293B
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Abstract
The present invention relates to wireless communication technology fields, and the invention discloses the media consulation methods based on network and terminal capability under a kind of Wireless VoIP environment, specially：Step 1: service controller obtains media capability, terminal access mode and the current network transmittability of terminal；Step 2: calling terminal initiates call request, service controller judges whether calling and called terminal has media capability intersection, it is and has the media coding intersection for being suitable for current network transmittability, then one of which or media is selected to encode the session established between calling and called；Otherwise three are entered step；Step 3: increasing network media ability in SDP message, and the SDP of calling and called terminal is redirected to the conversion that media server carries out coding mode, and the transcoding procedure of media server is controlled by service controller, after the completion of session establishment, calling and called terminal establishes RTP media channels with media server respectively.Realize two wireless terminal communications without media capability intersection.
Description
Technical field
The present invention relates to network and terminal energy are based under wireless communication technology field more particularly to a kind of Wireless VoIP environment
The media consulation method and system of power.
Background technology
In the VoIP system of the mainstreams such as soft switch, SIP and IMS, traditional media capability negotiation mechanism is typically basis
The intersection of media capability between terminal and terminal, if there is intersection, then selected in intersection it is one or more establish session, such as
Fruit does not have, then both sides can not be successfully established session.There is also shortcomings and insufficient, disadvantage for this traditional media capability negotiation mechanism
It is main as follows：
（1）The limitations such as wireless terminal minimized, battery capacity, it is difficult to dispose complete media capability；In addition, being applied to
The media capability of the terminal institute subordinate of different occasions is also had nothing in common with each other, therefore is likely to not assist in media negotiation between terminal
Quotient goes out media capability intersection.
（2）In the wireless context, network capacity is also big unlike cable network, and usually terminal may deposit
In plurality of access modes.Specifically, usually most directly reaction is exactly communication bandwidth to the transmittability of wireless network, in addition eventually
Hold the Radio Link feature corresponding to each access way different, direct effect is exactly logical corresponding to each access way
Letter bandwidth is had nothing in common with each other.And traditional media consulation method does not account for leading to corresponding to different access ways under wireless environment
Believe bandwidth ability, the result negotiated is caused to be likely to be not suitable for current network transmission resource or terminal access mode etc.
Situation（Such as it negotiates demand of the coding mode come to communication bandwidth and is more than actual bandwidth value）, cause the Service Quality of business
It measures less than guarantee.
Invention content
Lead to not establish because of intersection can not be negotiated for existing for traditional media machinery of consultation in the prior art
The result of session and media negotiation is not suitable for situations such as access way of current network transmission resource or terminal, causes industry
The problem of service quality of business cannot ensure, the present invention provides network and terminal capability are based under a kind of Wireless VoIP environment
Media consulation method, the invention also discloses the media negotiation systems based on network and terminal capability under a kind of Wireless VoIP environment
System.
The invention discloses the media consulation methods based on network and terminal capability under a kind of Wireless VoIP environment, specific
Include the following steps：Step 1: media capability, terminal access mode and current network that service controller obtains terminal pass
Movement Capabilities；Step 2: calling terminal initiates call request, media capability and access side of the service controller according to calling and called terminal
Formula judges whether calling and called terminal has media capability intersection, is and has the media coding for being suitable for current network transmittability to hand over
Collection then selects one of which or media to encode the session established between calling and called；Otherwise three are entered step；Step 3:
Increase the media capability for adapting to current network transmittability in SDP message, and the SDP of calling and called terminal is redirected to matchmaker
Body server carries out the conversion of coding mode, and the transcoding procedure of media server, session are controlled by service controller
After the completion of foundation, calling and called terminal establishes RTP media channels with media server respectively.
Further, above-mentioned steps one are specially：Access way and media capability are supplied to by terminal in registration
HSS servers, service controller inquire terminal access mode, media capability and network media ability to HSS servers.
Further, above-mentioned steps two further include have one or more kinds of media coding intersections when calling and called terminal, and
When having the media coding intersection for being suitable for current network transmittability, terminal media ability is changed in sdp.
Further, the process of modification terminal media ability is specially in sdp：Service controller changes calling terminal
SDP information in INVITE message retains the media coding for adapting to network capacity, will not fit into the matchmaker of network capacity
Body encodes corresponding port numbers and sets to 0.
Further, the detailed process of the media capability of increase adaptation current network transmittability is in sdp：Business
Increase network media ability in the SDP message that controller carries in caller INVITE message, and in the called SDP message replied
Middle increase network media ability.
The invention also discloses the media negotiation systems based on network and terminal capability under a kind of Wireless VoIP environment, special
Sign is to specifically include two SIP service terminals, service controller, media server and HSS；Two SIP service terminals difference
For calling terminal and called terminal；The calling terminal is for initiating calling；The called terminal is asked for receiving calling
It asks；
The service controller is used to judge that calling and called terminal is according to the media capability and access way of calling and called terminal
It is no to have media capability intersection, and judge whether there is the media coding intersection for being suitable for current network transmittability；It is to select
One of which or media coding establish the session between calling and called；Otherwise increase in sdp and adapt to current network transmission
The media capability of ability, and the SDP of calling and called terminal is redirected to the conversion that media server carries out coding mode；Session
After the completion of foundation, calling and called terminal establishes RTP media channels with media server respectively；
The media server is used under the control of service controller establish RTP media between calling and called terminal logical
Road；
The HSS is used to provide terminal access mode, media capability and network media ability to service controller.
By using above technical solution, beneficial effects of the present invention are：The present invention is by providing one kind in wireless ring
The media negotiation control method of converged network ability and terminal capability under border, in the case where calling and called media capability is incompatible,
Both sides still can communicate；And it avoids the media coding mode that calling and called terminal voluntarily negotiates to provide communication bandwidth
It deposits in absence of such a match, communicates between the demand in source and the practical communication bandwidth ability corresponding to terminal access mode
The case where quality degradation.
Description of the drawings
Fig. 1 is the acquisition process of terminal media ability and access way.
Fig. 2 is the processing procedure under main called terminal media capability match condition.
Fig. 3 is the processing procedure under main called terminal media capability mismatch case.
Fig. 4 is the media negotiation system structure based on network and terminal capability under Wireless VoIP environment.
Specific implementation mode
With reference to the accompanying drawings of the specification, the specific implementation mode that the present invention will be described in detail.
The invention discloses the media consulation methods based on network and terminal capability under a kind of Wireless VoIP environment, specific
Include the following steps：Step 1: media capability, terminal access mode and current network that service controller obtains terminal pass
Movement Capabilities；Step 2: calling terminal initiates call request, media capability and access side of the service controller according to calling and called terminal
Formula judges that calling and called terminal whether there is media capability intersection.Specifically, service controller is various according to calling and called terminal
Media capability forms public media capability and then the access way according to calling and called terminal, in the base of public medium ability
It is got rid of on plinth and the corresponding communication bandwidth ability of calling and called access way is had exceeded to communications bandwidth resources and is had exceeded current
The media capability of network transmission bandwidth sees whether there is also media capability intersections（By taking speech media ability as an example, pcm encoder side
Demand of the VoIP speech streams of formula to communication bandwidth is in 80kbps or so, and G.729 the VoIP speech streams of coding mode are to communication band
Wide demand is in 16kbps or so, therefore communication bandwidth is at least greater than 80kbps carryings PCM Speech Communications effect and could meet
It is required that same communication bandwidth is at least greater than 16kbps carryings, G.729 Speech Communication effect can just be met the requirements）.If in the presence of,
Selection one of which or media coding establish the session between calling and called；Otherwise three are entered step；Step 3: in SDP
（Session Description Protocol, Session Description Protocol）Increase the matchmaker for adapting to current network transmittability in message
Ability of immigrants, and the SDP of calling and called terminal is redirected to media server and carries out the conversion of coding mode, and pass through business control
The transcoding procedure of device processed control media server, after the completion of session establishment, calling and called terminal is built with media server respectively
Vertical RTP（Real-time Transport Protocol, real-time transport protocol, abbreviation RTP）Media channel.By the way that business is arranged
Controller get the media capability of terminal, the access way of terminal and current network transmittability, and pass through business control
Device processed is judged, when having media capability intersection between calling and called terminal and being suitable for current network transmittability, then directly according to
One of which or a variety of sessions established between calling and called are selected according to existing mode, when there is no media between calling and called terminal
When ability intersection or the coding intersection of its media capability are not suitable for current network transmittability, by the SDP weights of calling and called terminal
It is directed to media server and carries out coded format conversion, pass through SDP（Session Description Protocol, session are retouched
State agreement, abbreviation SDP）It is redirected to media server and carries out coded format conversion, and media server is controlled, meeting
Words establish after the completion of, calling and called terminal established respectively with media server RTP (Real-time Transport Protocol,
Real-time transport protocol, abbreviation RTP) media channel, pass through RTP Media Streams between calling and called terminal and realizes network transmission.The present invention
Method so that both sides still can communicate in the case where calling and called media capability is incompatible；And it avoids when eventually
When the selection of media coding mode and current access link state being held to mismatch, there is the case where communication quality degradation.
Fig. 1 is the acquisition process of terminal media ability and access way.
When terminal and media server are in registration, by registering terminal media ability, terminal or giving out information respectively
The information such as access way and network media ability are distributed to service controller.
Further, above-mentioned steps one are specially：Access way and media capability are supplied to by terminal in registration
HSS（Home Subscriber Server home subscriber servers, abbreviation HSS）Server, service controller is to HSS servers
Inquire terminal access mode, media capability and network media ability.Network media ability refers to being suitable for current network to transmit
The media capability of ability.
Fig. 2 is the processing procedure under main called terminal media capability match condition.
Terminal when initiating to call, according to the access way and media capability of calling and called terminal sentenced by service controller
It is disconnected, if there are many media coding intersections for calling and called terminal, and there is the media coding intersection for being suitable for current network transmittability,
Terminal media ability is then changed in sdp.Service controller changes the flow chart of SDP terminal media abilities as shown in figure 3, specific
Steps are as follows：
Step S201, service controller receive the SDP message carried in calling terminal INVITE message；
Step S202 obtains the access way and media capability of calling and called terminal from HSS；
Step S203, if there are many media codings and having to be suitable for current network biography in calling and called terminal media ability intersection
The media coding of Movement Capabilities, service controller then change the SDP information in calling terminal INVITE message, retain and adapt to network biography
The media coding of Movement Capabilities, the corresponding port numbers of media coding that will not fit into network capacity are set to 0；
Step S204, modification process terminate.
Further, above-mentioned steps two further include have one or more kinds of media coding intersections when calling and called terminal, and
When having the media coding intersection for being suitable for current network transmittability, terminal media ability is changed in sdp.
Further, the process of the above-mentioned terminal media ability of modification in sdp is specially：Service controller changes caller
SDP information in terminal INVITE message retains the media coding for adapting to network capacity, will not fit into network capacity
The corresponding port numbers of media coding set to 0.
Fig. 3 is the processing procedure under main called terminal media capability mismatch case.
Step S301, service controller receive the SDP message carried in calling terminal INVITE message；
Step S302 obtains the access way and media capability of calling and called terminal from HSS；
Step S303, if the media for not being suitable for current network transmittability in calling and called terminal media ability intersection are compiled
Code intersection, service controller then increase network media ability in the SDP that INVITE is carried（Do not increase and terminal capability repetition
Ability）；
Step S304, service controller increase network media ability in the SDP of called 200 OK replied（Do not increase with
The ability that terminal capability repeats）；
The SDP of calling and called is redirected to media server and carries out coding mode conversion by step S305, service controller, and
Media server is controlled；
Step S306, after the completion of session establishment, calling and called terminal establishes RTP media channels with media server respectively.
Further, the above-mentioned detailed process for increasing the media capability for adapting to current network transmittability in sdp is：
Increase network media ability in the SDP message that service controller carries in caller INVITE message, and in the called SDP replied
Increase network media ability in message.
The invention also discloses the media negotiation systems based on network and terminal capability under a kind of Wireless VoIP environment, such as scheme
Shown in 4, two SIP service terminals, service controller, media server and HSS are specifically included；Two SIP service terminals point
It Wei not calling terminal and called terminal；The calling terminal is for initiating calling；The called terminal is for receiving calling
Request；
The service controller is used to judge that calling and called terminal is according to the media capability and access way of calling and called terminal
It is no to have media capability intersection, and judge whether there is the media coding intersection for being suitable for current network transmittability；It is to select
One of which or media coding establish the session between calling and called；Otherwise increase in sdp and adapt to current network transmission
The media capability of ability, and the SDP of calling and called terminal is redirected to the conversion that media server carries out coding mode；Session
After the completion of foundation, calling and called terminal establishes RTP media channels with media server respectively；
The media server is used under the control of service controller establish RTP media between calling and called terminal logical
Road；
The HSS is used to provide terminal access mode, media capability and network media ability to service controller.
By above system, realize in the case where calling and called media capability is incompatible, both sides still can lead to
Letter；And it avoids when the selection of terminal media coding mode and current access link state mismatch, communication quality occurs
The case where degradation.
The coefficient and parameter gone out given in the above embodiments is available to those skilled in the art to realize or use
Invention, invention, which does not limit, only takes aforementioned disclosed numerical value, in the case where not departing from the thought of invention, the technology of this field
Personnel can make above-described embodiment various modifications or adjustment, thus the protection domain invented is not by above-described embodiment institute
Limit, and should be the maximum magnitude for meeting the inventive features that claims are mentioned.
Claims (3)
1. the media consulation method based on network and terminal capability, specifically includes step below under a kind of Wireless VoIP environment
Suddenly：Step 1: service controller obtains media capability, terminal access mode and the current network transmittability of terminal；Step
Two, calling terminal initiates call request, and service controller judges main quilt according to the media capability and access way of calling and called terminal
It cries whether terminal has media capability intersection, be and have the media coding intersection for being suitable for current network transmittability, then select it
Middle one or more media coding establishes the session between calling and called；Otherwise three are entered step；Step 3: in SDP message
Increase adapt to current network transmittability media capability, and by the SDP of calling and called terminal be redirected to media server into
The conversion of row coding mode, and the transcoding procedure of media server is controlled by service controller, after the completion of session establishment,
Calling and called terminal establishes RTP media channels with media server respectively,
Step 2 further includes working as calling and called terminal to have one or more kinds of media coding intersections, and have and be suitable for current network transmission
When the media coding intersection of ability, terminal media ability is changed in sdp, changes the process tool of terminal media ability in sdp
Body is：Service controller changes the SDP information in calling terminal INVITE message, retains the media volume for adapting to network capacity
Code, the corresponding port numbers of media coding that will not fit into network capacity are set to 0,
The detailed process of the media capability of increase adaptation current network transmittability is in sdp：Service controller is in caller
Increase network media ability in the SDP message carried in INVITE message, and increases network matchmaker in the called SDP message replied
Ability of immigrants.
2. the media consulation method based on network and terminal capability, feature under Wireless VoIP environment as described in claim 1
It is that above-mentioned steps one are specially：Access way and media capability are supplied to HSS servers, business control by terminal in registration
Device processed inquires terminal access mode, media capability and network capacity to HSS servers.
3. the media negotiation system based on network and terminal capability under a kind of Wireless VoIP environment, it is characterised in that specifically include two
A SIP service terminals, service controller, media server and HSS；Two SIP service terminals are respectively calling terminal and are called
Terminal；The calling terminal is for initiating calling；The called terminal is for receiving call request；
The service controller is used to obtain the media capability, terminal access mode and current network transmittability of terminal, root
Judge whether calling and called terminal has media capability intersection according to the media capability and access way of calling and called terminal, and judges whether
There is the media coding intersection for being suitable for current network transmittability；It is to select one of which or media to encode to establish master
Session between called, and terminal media ability is changed in sdp, the process for changing terminal media ability in sdp is specially：
Service controller changes the SDP information in calling terminal INVITE message, retains the media coding for adapting to network capacity, will
The corresponding port numbers of media coding for being not suitable with network capacity are set to 0；Otherwise increase in sdp and adapt to current network transmission energy
The media capability of power, and the SDP of calling and called terminal is redirected to the conversion that media server carries out coding mode, in SDP
Middle increase adapts to the detailed process of media capability of current network transmittability and is：Service controller is in caller INVITE message
Increase network media ability in the SDP message of carrying, and increases network media ability in the called SDP message replied；Session
After the completion of foundation, calling and called terminal establishes RTP media channels with media server respectively；
The media server under the control of service controller between calling and called terminal for establishing RTP media channels；
The HSS is used to provide terminal access mode, media capability and network media ability to service controller.
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| CN104539588B (en) * | 2014-12-09 | 2019-04-12 | 华为技术有限公司 | A kind of method and Call- Control1 network element of determining media capability |
| CN106161370B (en) * | 2015-04-08 | 2021-03-23 | 中国移动通信集团公司 | Media coding adjusting method and terminal |
| CN106817351A (en) * | 2015-12-01 | 2017-06-09 | 大唐移动通信设备有限公司 | A kind of method and device of media negotiation |
| CN106506444B (en) * | 2016-09-21 | 2019-04-26 | 中国电子科技集团公司第三十研究所 | A kind of media negotiation system and method towards LTE group system |
| CN110545248B (en) * | 2018-05-28 | 2022-03-01 | 中国电信股份有限公司 | Communication method and edge access control equipment |
| CN110557593A (en) * | 2018-06-01 | 2019-12-10 | 中兴通讯股份有限公司 | Media transmission method and H323-SIP gateway |
| CN110662186B (en) * | 2018-06-29 | 2022-03-04 | 中国电信股份有限公司 | Media negotiation method, media gateway control apparatus, and computer-readable storage medium |
| CN112153644B (en) * | 2019-06-27 | 2022-07-08 | 深圳清华大学研究院 | Global coding communication method and system |
| CN112867068A (en) * | 2021-01-22 | 2021-05-28 | 广东以诺通讯有限公司 | Method for selecting service data channel in IMS (IP multimedia subsystem) call under 5G NSA (network spanning tree) network |
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