CN100423510C - Device and its method for increasing multimedia communication quality by monitoring RTP/RTCP stream - Google Patents
Device and its method for increasing multimedia communication quality by monitoring RTP/RTCP stream Download PDFInfo
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- CN100423510C CN100423510C CNB2004100739537A CN200410073953A CN100423510C CN 100423510 C CN100423510 C CN 100423510C CN B2004100739537 A CNB2004100739537 A CN B2004100739537A CN 200410073953 A CN200410073953 A CN 200410073953A CN 100423510 C CN100423510 C CN 100423510C
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Abstract
The present invention discloses equipment and a method thereof for monitoring RTP/RTCP flows to increase multimedia communication quality. The RTP flow segment transmission equipment is set between a media gateway and a multimedia terminal, carries out real-time monitoring to the RTP/RTCP flows transmitted between the media gateway and the multimedia terminal, and establishes connection with call control equipment. On the one hand, signaling from the call control equipment is received and on the other hand, conversation quality information obtained by monitoring the RTP/RTCP flows is transmitted to the call control equipment, and the call control equipment and the RTP flow segment transmission equipment pertinently take measures for improving RTP/RTCP flow transmission quality according to the conversation quality information. The present invention can realize the real-time monitoring to the multimedia communication quality, automatically improve the relevant parameters of the RTP/RTCP flows, and thereby, increase the service quality of multimedia communication.
Description
Technical field
The present invention relates to the method for a kind of raising multimedia communication service quality (QoS), be particularly related to the equipment that a kind of use monitors the RTP/RTCP data flow with segmented mode, utilize the supervision result of this equipment to take measures targetedly, improve the method for multimedia communication service quality.The invention belongs to communication technical field.
Background technology
Current, along with voice, data, multimedia three class business realize merging gradually on IP network, the use of VoIP (Voice over Internet Protocol) technology and soft switch (soft switch) technology is just becoming increasingly extensive.In the network that adopts existing voip technology or Softswitch technology, as shown in Figure 1, the signaling that media gateway, multimedia communication terminal can be sent according to the call control device that soft switch/call server/pass is kept and so on, directly transmit RTP (Real-Time TransportProtocol each other, RTP)/RTCP (Real-Time Transport Control Protocol, RTCP Real-time Transport Control Protocol) stream, thus carry out the exchange of multimedia messages.
Directly coming the way of exchange multimedia information to cause a problem easily by RTP/RTCP stream between above-mentioned media gateway, the multimedia communication terminal, is exactly that the actual transmission status that call control device is not understood RTP/RTCP stream such as is kept in soft switch/call server/pass.If the transmission quality of network is poor, cause the transmission of RTP/RTCP stream obstacle to occur, soft switch/call server/pass equipment such as is kept and can't be understood at all, therefore also just can not take corresponding measure, thereby can't improve the service quality of multimedia communication targetedly according to actual conditions.
Summary of the invention
The objective of the invention is to according to above-mentioned the deficiencies in the prior art, provide a kind of use rtp streaming segment transmissions equipment that RTP/RTCP stream is monitored, actual conditions according to its transmission are taken measures targetedly, thereby improve the method for multimedia communication service quality.
For realizing above-mentioned goal of the invention, the present invention adopts following technical scheme:
A kind of monitoring RTP/RTCP stream is to improve the method for multimedia communication quality, realize that based on rtp streaming segment transmissions equipment described rtp streaming segment transmissions equipment comprises that at least RTP processing module, RTCP processing module, Communications Processor Module, quality of the conversation monitor module and quality of the conversation improve module;
Described RTP processing module and RTCP processing module inside have the Buffer Pool that is used to cushion RTP data flow and RTCP data flow respectively, comprise at least one pair of buffer queue in each Buffer Pool;
Described quality of the conversation monitor module is connected with the RTCP processing module with described RTP processing module respectively, and therefrom obtain RTP data-flow quality parameter and RCTP data-flow quality parameter, session quality monitoring result is exported to the described quality of the conversation that is attached thereto improves module on the one hand by analysis, exports described result to the described Communications Processor Module that is attached thereto on the other hand;
It is characterized in that:
Described rtp streaming segment transmissions equipment is set on the RTP/RTCP flow transmission path between media gateway and the multimedia terminal, by the mode of distributing a pair of RTP buffer queue and a pair of RTCP buffer queue for each session the RTP/RTCP stream that transmits between them is monitored in real time by described rtp streaming segment transmissions equipment;
Described rtp streaming segment transmissions equipment and call control device connect, and receive the signaling from it on the one hand, send the quality of the conversation information that monitoring RTP/RTCP stream obtains to described call control device on the other hand;
The measure that described call control device and described rtp streaming segment transmissions equipment take to solve RTP/RTCP dither flow problem targetedly according to described quality of the conversation information.
In case described call control device has been set up a new session, described rtp streaming segment transmissions equipment just distributes a pair of RTP buffer queue and a pair of RTCP buffer queue respectively for this session in described RTP Buffer Pool and RTCP Buffer Pool.
RTP processing module in the described rtp streaming segment transmissions equipment receives rtp streaming, extract the content that comprises packet sequence number, timestamp, synchronisation source, component source respectively, calculate the quality of the conversation parameter that comprises packet loss rate, session delay, average jitter then respectively, and this parameter is reported to described quality of the conversation monitor module.
The measure of described solution RTP/RTCP dither flow problem comprises by described RTP processing module carries out traffic shaping to reduce shake or to increase the time of delay of Media Stream to reduce the influence of shake to communication quality by adjusting Buffer Pool to rtp streaming.
Under the not good situation of quality of the conversation, described call control device stops at and sets up new session between media gateway and the multimedia terminal.
Described RTP/RTCP stream is based on a kind of transmission the in UDP or TCP or the ATM agreement.
Monitoring RTP of the present invention/RTCP stream passes through to introduce rtp streaming segment transmissions equipment with the method that improves multimedia communication quality, utilizes the monitoring of segmented mode foundation to RTP/RTCP stream, thereby realizes the real-time monitoring to multimedia communication quality.Simultaneously, this rtp streaming segment transmissions equipment can also improve the related parameter that has of RTP/RTCP stream automatically, thereby improves the service quality of multimedia communication.
Description of drawings
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is in the existing network, directly transmits the schematic diagram of RTP/RTCP stream between media gateway, the multimedia communication terminal.
Fig. 2 is the composition structured flowchart of rtp streaming segment transmissions equipment.
Fig. 3 has shown the position of RTP segment transmissions equipment in entire I P network system.
Fig. 4 is that use segmented mode of the present invention monitors the schematic diagram of RTP/RTCP stream with the method for raising communication quality.
Embodiment
RTP/RTCP is a kind of transport layer protocol that people develop at the needs of looking audio transmission in real time, and it does not have the assurance of any transmission reliability and the congestion control mechanism of flow, thereby can't ensure the quality of looking audio transmission in real time.On the udp protocol of Real-time Transport Protocol position, transport layer below on function, being independent of (UDP) and network layer, but can not exist as a level separately, normally utilize the udp protocol of low layer that real-time video/audio is carried out multicast or clean culture, thereby realize the transmission of multiple spot or single-point video/audio.UDP is a kind of not connection-oriented packet delivery service, and it can't guarantee to look in real time the service quality (QoS) of audio transmission business, needs real-time monitor data transmission of RTCP and service quality.RTP itself does not have the ability of independent transmission, and it must combine the transmission service that just can finish data with the lower layer network agreement.Because video and the correlation of audio frequency on time shaft are not strong, and the real-time of data requires to be higher than its reliability requirement, so on UDP, utilize the RTP/RTCP agreement that Media Stream is encapsulated, packs and synchronously, can make the Network Transmission time-delay of digital video-audio signal reach minimum.This is the reason place of people's widely-used RTP/RTCP agreement in the real-time multimedia communication business just.
The present invention lacks the mechanism that RTP/RTCP stream is monitored in real time in view of prior art, thereby can't ensure the defective of multimedia communication service quality, has introduced rtp streaming segment transmissions equipment in the transmission path of RTP/RTCP stream.This equipment utilization RTP/RTCP stream is that the udp protocol of bottom carries out the characteristics that framing (Framing) operation back forms to multi-medium data, grouping is monitored in real time to UDP, and extract contents such as wherein packet sequence number, timestamp, synchronisation source, component source, calculate network transmission parameter such as packet loss rate, session delay, average jitter respectively, so that the related network control appliance can be grasped network service quality (QoS) for information about in real time, in time take corrective measure.
Fig. 2 is the composition structured flowchart of rtp streaming segment transmissions equipment of the present invention.This equipment comprises that RTP processing module, RTCP processing module, Communications Processor Module, quality of the conversation monitor module and quality of the conversation improve module, in addition, also has statistical module and device management module (not showing among Fig. 2) that itself is managed.RTP processing module and RTCP processing module inside have the Buffer Pool that is used to cushion RTP grouping and RTCP grouping respectively.Comprise at least one pair of buffer queue in each Buffer Pool.Through above-mentioned RTP Buffer Pool, same, RTCP stream also will pass through above-mentioned RTCP Buffer Pool when transmitting to rtp streaming in network in the process of Network Transmission.Will set up the reason of buffer queue to be that one of them buffer queue is used for transmitting by the data flow of information source (perhaps caller) to the stay of two nights (perhaps called) specially in RTP Buffer Pool/RTCP Buffer Pool in pairs, and another buffer queue to be used for transmitting reciprocal data flow from the stay of two nights (perhaps called) to information source (perhaps caller) specially.Whenever call control device has been set up a session, rtp streaming segment transmissions equipment just distributes a pair of RTP buffer queue and a pair of RTCP buffer queue respectively for this session in RTP Buffer Pool and RTCP Buffer Pool.As shown in Figure 2, the quality of the conversation monitor module obtains RTP mass parameter and RCTP mass parameter respectively from RTP processing module and RTCP processing module, the result is exported to quality of the conversation improves module on the one hand by analysis, take the improvement measure targetedly so that quality of the conversation improves module, improve the service quality (QoS) of network service; To Communications Processor Module output result, this Communications Processor Module transmits the quality of the conversation monitored results to the call control device of outside on the other hand, so that call control device is in time adjusted relevant signaling according to network communication quality.Statistical module is used for relevant data is added up, and device management module is responsible for entire equipment is managed.
Need to prove that this rtp streaming segment transmissions equipment can realize that it realizes that form class is similar to the IP processing section of media gateway or media termination based on existing computer system.But different with media gateway or media termination is, media gateway or media termination generally are converted to rtp streaming TDM (Time Division Multiplexing, time division multiplexing) signal, and the input and output of segment transmissions equipment of the present invention are RTP/RTCP stream.In addition, the Module Division of this segmentation transmission equipment also not exclusively is on the hardware meaning, also to comprise the division of carrying out from logical perspective.The function of these modules can embed in other equipment of entire I P network, be that each functional module can dispersed and distributed, as long as the real-time monitoring that each module is carried out on the whole to RTP/RTCP stream by software arrangements promptly can be considered this rtp streaming segment transmissions equipment of having realized.
Fig. 3 has shown the position of this RTP segment transmissions equipment in entire I P network system.As can be seen from the figure, this segmentation transmission equipment is owing to adopt Real-time Transport Protocol, and its application module is positioned on the udp protocol, and promptly RTP/RTCP stream is based on that udp protocol transmits.Similar with existing media gateway or media termination, under udp protocol the IP layer, this is based on the IP agreement with regard to meaning transmission that this equipment carries out.Be bsp driver under the IP layer, bsp driver is used for providing driving to hardware, so that hardware identification and acceptance are based on the instruction of upper-layer protocol.
Fig. 4 is the schematic diagram of use segmented mode monitoring RTP stream of the present invention with the method for raising communication quality.As shown in Figure 4, rtp streaming segment transmissions equipment is arranged between media gateway and the multimedia terminal, the RTP/RTCP stream that transmits between them is monitored in real time, this segment transmissions equipment and soft switch/call server/pass call control device such as are kept and are connected, receive signaling on the one hand from it, send the quality of the conversation information that monitoring RTP/RTCP stream obtains to above-mentioned call control device on the other hand, so that call control device takes some countermeasures targetedly.When multimedia communication was set up, soft switch/call server/pass equipment such as kept by signaling request media gateway and multimedia terminal respectively and set up RTP/RTCP stream between this rtp streaming segment transmissions equipment.The content and the stream of the RTP/RTCP among Fig. 1 of RTP/RTCP stream are identical, and unique not being both needs through segment transmissions equipment.
In the process that rtp streaming segment transmissions equipment is monitored in real time to RTP/RTCP stream, the RTP processing module is responsible for receiving the rtp streaming from media gateway or media termination, extract contents such as wherein packet sequence number, timestamp, synchronisation source, component source respectively, calculate the relevant parameter of packet loss rate, session delay (delay), average jitter quality of the conversations such as (jitter) then respectively, and this parameter is reported to the quality of the conversation monitor module; The RTCP processing module is responsible for receiving the RTCP stream from media gateway or media termination, to obtain to arrive from staging device the quality of the conversation information of equipment such as media gateway or media termination, reports to the quality of the conversation monitor module.The comprehensive above-mentioned parameter of quality of the conversation monitor module judges whether quality of the conversation reaches the predefined quality minimum of system, just information is not passed to quality of the conversation and improves module if reach the quality minimum.Quality of the conversation improves the information that module then provides according to the quality of the conversation monitor module, according to the strategy of system's appointment, adjusts and improves quality of the conversation.
Above-mentioned quality of the conversation improves strategy and is mainly reflected in following several respects:
At first, the information that the quality of the conversation monitor module provides can report to soft switch/call server/pass by Communications Processor Module and call control device such as keep, can avoid under the not good situation of communication quality media gateway and multimedia terminal to set up more session like this, communication quality is further descended.
Secondly, it is generally acknowledged that three principal elements that influence communication quality are followed successively by: packet loss rate, shake and delay.Analyze the problem of the unable solution packet loss rate of the method for the invention and equipment thereof from the mechanism that the present invention realizes.Therefore, above-mentioned quality of the conversation improves module and the improvement of communication quality is mainly reflected in solves its jitter problem.This quality of the conversation improves module can control the RTP processing module, and the rtp streaming that system is exported carries out traffic shaping (shaping), reduces shake.
Once more, this rtp streaming segment transmissions equipment can also improve communication quality by the functional modules such as RTP/RTCP Buffer Pool of portion's foundation within it.It is present that this improves procedure body:
If the retardation ratio of Media Stream is less, but shake is bigger, and above-mentioned segment transmissions equipment can suitably increase the delay of Media Stream by Buffer Pool, and Media Stream cooperated carries out suitable traffic shaping (shaping) to reduce the influence of shake to communication quality.
This rtp streaming segment transmissions equipment can the real time monitoring multimedia communication quality, and improved where necessary.In this course, it needn't understand operations such as media information Code And Decode, so the cost that realizes is much smaller.Utilize the computer platform of main flow, can realize real time monitoring very like a cork thousands of RTP/RTCP streams of hundreds of.
It is pointed out that in the above-described embodiment rtp streaming uses udp protocol to transmit data, still, rtp streaming also can be worked on other agreements such as TCP or ATM.In this case, the method for the invention and equipment thereof can play a role equally.
Though above described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and does not break away from spirit of the present invention, wishes that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (7)
1. monitor RTP/RTCP Real-time Transport Control Protocol data flow to improve the method for communication quality for one kind, realize, it is characterized in that based on RTP data flow segment transmissions equipment:
Described RTP data flow segment transmissions equipment is set on the RTP between media gateway and the multimedia terminal/RTCP Real-time Transport Control Protocol data flow transmission path, by the mode of distributing a pair of RTP buffer queue and a pair of RTCP Real-time Transport Control Protocol buffer queue for each session the RTP/RTCP Real-time Transport Control Protocol data flow that transmits between described media gateway and the multimedia terminal is monitored in real time by described RTP data flow segment transmissions equipment;
Described RTP data flow segment transmissions equipment and call control device connect, receive the signaling from described call control device on the one hand, the quality of the conversation information that will monitor RTP/RTCP Real-time Transport Control Protocol data flow acquisition on the other hand sends described call control device to;
Described call control device and described RTP data flow segment transmissions equipment take to solve RTP/RTCP Real-time Transport Control Protocol data flow jitter problem targetedly according to described quality of the conversation information measure.
2. monitoring RTP as claimed in claim 1/RTCP Real-time Transport Control Protocol data flow is characterized in that to improve the method for communication quality:
In case described call control device has been set up a new session, described RTP data flow segment transmissions equipment just distributes a pair of RTP buffer queue and a pair of RTCP Real-time Transport Control Protocol buffer queue respectively for this session in RTP Buffer Pool and RTCP Real-time Transport Control Protocol Buffer Pool.
3. monitoring RTP as claimed in claim 1/RTCP Real-time Transport Control Protocol data flow is characterized in that to improve the method for communication quality:
RTP processing module in the described RTP flow point section transmission equipment receives the RTP data flow, extract the content that comprises packet sequence number, timestamp, synchronisation source, component source respectively, calculate the quality of the conversation parameter that comprises packet loss rate, session delay, average jitter then respectively, and described quality of the conversation parameter is reported to the quality of the conversation monitor module.
4. monitoring RTP as claimed in claim 1/RTCP Real-time Transport Control Protocol data flow is characterized in that to improve the method for communication quality:
The measure of described solution RTP/RTCP Real-time Transport Control Protocol data flow jitter problem comprises by the RTP processing module carries out traffic shaping to reduce shake to the RTP data flow.
5. monitoring RTP as claimed in claim 1/RTCP Real-time Transport Control Protocol data flow is characterized in that to improve the method for communication quality:
The measure of described solution RTP/RTCP Real-time Transport Control Protocol data flow jitter problem comprises that the RTP processing module increases the time of delay of Media Stream to reduce the influence of shake to communication quality by adjusting Buffer Pool.
6. monitoring RTP as claimed in claim 1/RTCP Real-time Transport Control Protocol data flow is characterized in that to improve the method for communication quality:
Under the not good situation of quality of the conversation, described call control device stops at and sets up new session between described media gateway and the multimedia terminal.
7. monitoring RTP as claimed in claim 1/RTCP Real-time Transport Control Protocol data flow is characterized in that to improve the method for communication quality:
Described RTP/RTCP Real-time Transport Control Protocol data flow is based on a kind of transmission the in UDP or TCP or the ATM agreement.
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| CNB2004100739537A CN100423510C (en) | 2004-09-17 | 2004-09-17 | Device and its method for increasing multimedia communication quality by monitoring RTP/RTCP stream |
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| CNB2004100739537A CN100423510C (en) | 2004-09-17 | 2004-09-17 | Device and its method for increasing multimedia communication quality by monitoring RTP/RTCP stream |
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| CN100423510C true CN100423510C (en) | 2008-10-01 |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100428694C (en) * | 2006-04-29 | 2008-10-22 | 华为技术有限公司 | Method and system for controlling IP bearing network service quality |
| CN101379761A (en) * | 2006-12-05 | 2009-03-04 | 华为技术有限公司 | Method and system for distributed architecture for monitoring session liveness |
| CN101202743A (en) * | 2006-12-14 | 2008-06-18 | 联想(北京)有限公司 | IMS terminal, stacking server and method of IMS handling of traffic |
| CA2698344C (en) * | 2007-07-09 | 2016-08-30 | Telefonaktiebolaget L M Ericsson (Publ) | Adaptive rate control in a communications system |
| CN101562583B (en) * | 2008-04-18 | 2012-02-15 | 华为技术有限公司 | Method, system and device for obtaining buffer memory data |
| GB2481254B (en) * | 2010-06-18 | 2017-07-12 | Skype | Determining network quality |
| JP5853862B2 (en) * | 2012-05-23 | 2016-02-09 | ソニー株式会社 | Information processing apparatus, information processing system, and information processing method |
| KR101787594B1 (en) * | 2013-08-29 | 2017-10-18 | 유니파이 게엠베하 운트 코. 카게 | Maintaining audio communication in a congested communication channel |
| US10069965B2 (en) | 2013-08-29 | 2018-09-04 | Unify Gmbh & Co. Kg | Maintaining audio communication in a congested communication channel |
| CN104539480B (en) * | 2014-12-23 | 2018-08-10 | 深圳市有信网络技术有限公司 | A kind of stream media transmission quality monitoring method and its system |
| US10250486B2 (en) * | 2016-10-14 | 2019-04-02 | Gvbb Holdings S.A.R.L. | System and method for isochronous switching of packetized media streams |
| CN110996057B (en) * | 2019-12-02 | 2021-11-16 | 腾讯云计算（北京）有限责任公司 | Media data processing method and device, computer equipment and storage medium |
| CN111800388A (en) * | 2020-06-09 | 2020-10-20 | 盐城网之易传媒有限公司 | Media information processing method and media information processing device |
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| US6556565B1 (en) * | 1998-07-01 | 2003-04-29 | Nortel Networks Limited | Internet protocol (IP) telecommunication |
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