CN102790666B - Error control method, receiving end, transmitting end and system - Google Patents
Error control method, receiving end, transmitting end and system Download PDFInfo
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- CN102790666B CN102790666B CN201110127328.6A CN201110127328A CN102790666B CN 102790666 B CN102790666 B CN 102790666B CN 201110127328 A CN201110127328 A CN 201110127328A CN 102790666 B CN102790666 B CN 102790666B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1825—Adaptation of specific ARQ protocol parameters according to transmission conditions
Abstract
The invention discloses an error control method, a receiving end, a transmitting end and a system, belonging to the communication field. The error control method comprises the following steps of: acquiring an initial packet loss rate of a communication network and network delay of the communication network; judging whether the initial packet loss rate of the communication network is smaller than a first packet loss rate in which a quick-start and retransmission request and whether the network delay of the communication network is smaller than a preset delay threshold value; if the initial packet loss rate of the communication network is smaller than the first packet loss rate and the network delay of the communication network is smaller than the preset delay threshold, adopting a manner of the quick-start and retransmission request to carry out an error control. The receiving end comprises an acquiring module, a first judging module and a control module. The system comprises a receiving end and a transmitting end. In the invention, different error control methods are used according to change conditions of a network condition, multiple error control methods are used synthetically, effective use of the communication network is improved, and a better anti-packet-loss effect is achieved under a higher utilization rate of the communication network.
Description
Technical field
The present invention relates to the communications field, particularly the method for error control, receiving terminal, transmitting terminal and system.
Background technology
For real-time video, voice communication, usually by the encoder of coding side (i.e. transmitting terminal), the video gathered, audio-frequency information are encoded, produce a series of packet, and according to RTP (Real-timeTransport Protocol, real-time Transmission) packet that coding side is produced by transmission channel by agreement, be sent to decoding end; The decoder of decoding end (i.e. receiving terminal) is decoded to the packet received, and recovers original video, audio frequency.But, when transmitting real-time code stream on transport channels, the packet loss existed due to channel itself or error code, there is no QoS (Quality of Service especially, service quality) on the network that ensures, packet may produce packet loss in transmitting procedure, once decoding end receives the packet of packet loss, decoder cannot correctly recover original video, audio frequency, thus error control measure to take be very important.
In order to reduce the impact of Network Packet Loss on video, audio frequency real time communication, prior art adopts various error control method usually, as forward error correction (Forward Error Correction, FEC) repeat requests (Automatic Repeat Request, is opened soon, and bag-losing hide (Packet Loss Concealment ARQ), PLC) etc., bag-losing hide is also referred to as backward error correction.
Wherein, prior art one adopts forward error correction FEC method, increases redundant data packets at transmitting terminal, when receiving terminal receives the packet of packet loss, and can by some computings by the date restoring of packet loss out.Figure 1 shows that example is described, the packet sequence number of transmitting terminal is: 1,2,3,4, and by increasing redundant data packets to the computing of packet at transmitting terminal, obtaining 5, carrying out computing obtain 6 to 3 and 4 as carried out computing to 1 and 2; Due to packet loss appearring in network, it is discontinuous for causing the sequence number that receiving terminal receives, and namely 2 and 4 have been lost; Receiving terminal by carrying out computing to receive 1,3,5,6, obtains 2 and 4, therefore, sequence number be 1,2,3,4 packet be obtained for recovery.Prior art one carries out error control by increasing redundant data packets, reduce the effective rate of utilization of communication network, in above-mentioned example, effective packet is 1,2,3,4, the packet 5,6 of redundancy, thus the effective rate of utilization of this communication network is 4/6=2/3.Therefore, when total bandwidth is certain, the effective rate of utilization of communication network is higher, more bandwidth can be used for the transmission of video/audio bag, so just can obtain better video and audio quality, its essence is the quality of sacrificing video and audio, exchange anti-dropout ability for.
Prior art two adopts and opens repeat request ARQ method soon, receiving terminal is by detecting RTP (the Real-time Transport Protocol in the packet of reception, real time transport protocol) sequence number, after discovery packet loss, rapid requests transmitting terminal passes the bag lost once more again, and it is better that this kind of error control method solves Network Packet Loss effect in little time delay, little packet loss situation.Figure 2 shows that example is described, transmitting terminal have sent 10 bags, and its sequence number increases progressively continuously; Because packet loss appears in network, it is discontinuous for causing the sequence number that receiving terminal receives, and namely loses 4 bags in 10 bags; Receiving terminal is by ARQ, and request transmitting terminal has retransmitted 4 bags lost, and wherein wrapping in effective time of sequence number 7,8 has retransmitted; Sequence number 2,4 may be lost in retransmission processes, and it is overtime invalid also may to retransmit.But, because the packet retransmitted also is to take the network bandwidth, if a large amount of packet loss, a large amount of data retransmissions will be produced, and network is when producing a large amount of packet loss, be likely that the data volume of transmission has exceeded communication network bandwidth, in other words network and had congested situation, in this case apply and open retransmission request method soon and solve packet loss problem and only can worsen network condition.
Prior art three adopts backward error correction PLC method, when receiving terminal has packet loss, by the relevance before the data of front and back, utilizes error concealment algorithm, the transmission after smoother process packet loss.According to the difference of medium type and the difference of actual scene, can produce in some cases and cover effect preferably, people may can not discover out, and just cannot accomplish in some cases to make people discover less than.
In the process realizing the embodiment of the present invention, inventor finds that prior art at least exists following problem:
FEC increases redundant data packets by coding side and carries out error control, can reduce the effective rate of utilization to bandwidth, be applicable to the less demanding situation of audio quality; ARQ carries out error control by retransmission data packet may, and because the packet retransmitted also is to take the network bandwidth, if a large amount of packet loss, will produce a large amount of data retransmissions, ARQ is applicable to the situation of little packet loss, little time delay; PLC is the method for a kind of error concealment in decoding end, and for different medium types and actual scene, the effect of PLC is different.
Visible, existing error control method, the situation that can be suitable for due to principle difference is also different, and a kind of mode in ARQ, PLC or FEC can only be adopted to carry out error control, more single to the form of the error control of network, the anti-packet loss ability of error control is lower.
Summary of the invention
In order to improve the anti-packet loss ability of error control, embodiments provide a kind of method of error control, receiving terminal, transmitting terminal and system, by comprehensively using multiple error control method, improve the utilance to the network bandwidth on the one hand, on the other hand under the cooperation of multiple error control method, reach video and audio effect global optimum.Described technical scheme is as follows:
A method for error control, described method comprises:
The initial packet loss of obtaining communication network and the network delay of communication network;
Judge whether the initial packet loss of described communication network is less than the first packet loss that repeat requests is opened in default enabling soon, and whether the network delay of described communication network is less than default delay threshold;
If the initial packet loss of described communication network is less than the first packet loss that repeat requests is opened in default enabling soon, and network delay is less than default delay threshold, then the mode opening repeat requests is soon adopted to carry out error control;
Statistics adopts the second packet loss after opening repeat requests soon, and described second packet loss is fed back to transmitting terminal, opens the parameter of repeat requests to make transmitting terminal soon according to the initial packet loss of described communication network and described second packet loss adjustment.
Embodiments provide another kind of error control method, described method comprises:
Packet is sent to receiving terminal;
Obtain the initial packet loss of the communication network of receiving terminal feedback and adopt the second packet loss after opening repeat requests soon, and obtaining the 3rd packet loss according to the initial packet loss of described communication network and the difference of described second packet loss;
Judge whether described 3rd packet loss is less than the 4th default packet loss, if the 3rd packet loss is less than the 4th default packet loss and described 3rd packet loss is not 0, then improve the parameter opening repeat requests soon; If described 3rd packet loss is 0, then reduce the parameter opening repeat requests soon.
The embodiment of the present invention additionally provides a kind of receiving terminal, and described receiving terminal comprises acquisition module, the first judge module, control module and feedback module;
Described acquisition module is used for the initial packet loss of obtaining communication network and the network delay of communication network;
Described first judge module is for judging whether the initial packet loss of described communication network is less than the first packet loss that repeat requests is opened in default enabling soon, and whether the network delay of described communication network is less than default delay threshold;
Described control module is used for when the judged result of described first judge module is for being, adopts the mode opening repeat requests soon to carry out error control;
Described feedback module opens the second packet loss after repeat requests soon for adding up employing, and described second packet loss is fed back to transmitting terminal, opens the parameter of repeat requests to make transmitting terminal soon according to the initial packet loss of described communication network and described second packet loss adjustment.
The embodiment of the present invention additionally provides a kind of transmitting terminal, and described transmitting terminal comprises sending module, the first acquisition module and the first judge module;
Described sending module is used for sending packet to receiving terminal;
Described first acquisition module opens the second packet loss after repeat requests soon for the initial packet loss and employing obtaining the communication network of receiving terminal feedback, and obtains the 3rd packet loss according to the initial packet loss of described communication network and the difference of described second packet loss;
Described first judge module is for judging whether described 3rd packet loss is less than the 4th default packet loss, if the 3rd packet loss is less than the 4th default packet loss and described 3rd packet loss is not 0, then improves the parameter opening repeat requests soon; If described 3rd packet loss is 0, then reduce the parameter opening repeat requests soon.
The embodiment of the present invention additionally provides a kind of system of error control, and described system comprises receiving terminal and transmitting terminal;
Described receiving terminal comprises acquisition module, the first judge module and control module; Described acquisition module is used for the initial packet loss of obtaining communication network and the network delay of communication network; Described first judge module is for judging whether the initial packet loss of described communication network is less than the first packet loss that repeat requests is opened in default enabling soon, and whether the network delay of described communication network is less than default delay threshold; Described control module is used for when the judged result of described first judge module is for being, adopts the mode opening repeat requests soon to carry out error control;
Described transmitting terminal comprises sending module, the first acquisition module and the first judge module; Described sending module is used for sending packet to receiving terminal; Described first acquisition module opens the second packet loss after repeat requests soon for the initial packet loss and employing obtaining the communication network of receiving terminal feedback, and obtains the 3rd packet loss according to the initial packet loss of described communication network and the difference of described second packet loss; Described first judge module is for judging whether described 3rd packet loss is less than the 4th default packet loss, if the 3rd packet loss is less than the 4th default packet loss and described 3rd packet loss is not 0, then improves the parameter opening repeat requests soon; If described 3rd packet loss is 0, then reduce the parameter opening repeat requests soon.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is: use different error control methods by the situation of change of network condition, and the multiple error control method of comprehensive use, improve the effective utilization to communication network, reach and have better anti-dropout effect under higher communication network utilization.
Accompanying drawing explanation
Fig. 1 is the schematic diagram adopting forward error correction FEC method in prior art;
Fig. 2 adopts the schematic diagram opening repeat request ARQ method soon in prior art;
Fig. 3 is the method flow diagram of the error control provided in the embodiment of the present invention 1;
Fig. 4 is the method flow diagram of the error control provided in the embodiment of the present invention 2;
Fig. 5 is the graph of a relation of transmitting terminal and the receiving terminal provided in the embodiment of the present invention 2;
Fig. 6 is the schematic diagram of the expansion RTCP RR message provided in the embodiment of the present invention 2;
Fig. 7 is the structural representation of the receiving terminal provided in the embodiment of the present invention 3;
Fig. 8 is the structural representation of the transmitting terminal provided in the embodiment of the present invention 4;
Fig. 9 is the structural representation of the accuracy control system provided in the embodiment of the present invention 5.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
With regard to a certain error control method, due to the difference specifically adopting principle and realize, anti-dropout effect also can be different, and such as FEC_A method may than the anti-dropout better effects if of FEC_B method.The difference that what the embodiment of the present invention was paid close attention to is not because the difference of error control method causes, but when the multiple error control method of comprehensive use, use different error control methods according to the situation of change of network condition, thus obtain higher communication network utilization and good video and audio effect.
Embodiment 1
See Fig. 3, present embodiments provide a kind of method of error control, the method specifically comprises:
101: the initial packet loss of obtaining communication network and the network delay of communication network;
102: judge whether the initial packet loss of communication network is less than the first packet loss that repeat requests is opened in default enabling soon, and whether the network delay of communication network is less than default delay threshold;
103: if the initial packet loss of communication network is less than the first packet loss that repeat requests is opened in default enabling soon, and network delay is less than default delay threshold, then adopt the mode opening repeat requests soon to carry out error control.
The method that the present embodiment proposes, different error control methods is used by the situation of change of network condition, and the multiple error control method of comprehensive use, improve the effective utilization to communication network, reach and have better anti-dropout effect under higher communication network utilization.
Embodiment 2
See Fig. 4, the embodiment of the present invention proposes a kind of method of error control, specifically comprises:
201: transmitting terminal carries out coding generation packet to the video, the audio-frequency information that gather, by Real-time Transport Protocol by this Packet Generation to receiving terminal, at least comprise RTP sequence number in this packet;
Particularly, packet transmits with the form of real-time code stream on transport channels, lose code or error code because channel itself exists, receiving terminal may receive the packet of packet loss, generally makes receiving terminal correctly recover original video, audio-frequency information by error control method.
202: receiving terminal is enabled network delay and detected, and detects the network delay of communication network, and according to the initial packet loss of RTP sequence number obtaining communication network, to the initial packet loss of transmitting terminal feedback communication network;
For this step, the step of receiving terminal according to the initial packet loss of RTP retrieval communication network and to transmitting terminal feedback is prior art, and the present embodiment does not elaborate to this.Wherein, receiving terminal is by the initial packet loss of RTCPRR message feedback communication network.
203: receiving terminal judges whether to meet the condition of enabling ARQ according to the initial packet loss of communication network, the network delay of communication network, if meet, then enables ARQ and carries out error control, perform step 204; Otherwise, perform step 208;
For this step, receiving terminal presets the packet loss and delay threshold of enabling ARQ, the condition of enabling ARQ is specially: the network delay of communication network is less than default delay threshold, and the initial packet loss of communication network is less than and default enables the packet loss that ARQ carries out error control, if receiving terminal judges that the initial packet loss of communication network and the network delay of communication network meet this condition, then enable ARQ and carry out error control; If do not meet, then do not enable ARQ, need to solve by the method for other error control.
204: receiving terminal enables the second packet loss after ARQ to transmitting terminal feedback, judge whether the initial packet loss of communication network is greater than the second packet loss after enabling ARQ, if initial packet loss is greater than the second packet loss, then carry out error control according to the parameter opening repeat requests soon after adjustment, if initial packet loss is less than the second packet loss, then stop ARQ, perform step 208;
In practical application, after enabling ARQ, receiving terminal will enable the second packet loss Real-time Feedback after ARQ to transmitting terminal, and particularly, receiving terminal expansion RTCP XR message feedback enables the second packet loss after ARQ.The embodiment of the present invention does not limit, as long as the RTCPXR message met after expansion can carry the second packet loss after enabling ARQ the mode of expansion RTCP XR message.
If the initial packet loss of communication network is greater than the second packet loss after enabling ARQ, then illustrate under current network condition, the mode adopting ARQ to carry out error control at least partly can solve the problem of Network Packet Loss.Owing to solving Network Packet Loss by ARQ, be harmless for video and audio quality, so in this case, ARQ can be continued through as far as possible and solve Network Packet Loss.And for cannot be solved the packet loss of network by ARQ, just need the method for other error control to solve, as step 206.
If the initial packet loss of communication network is not more than the second packet loss after enabling ARQ, then illustrate under current network condition, retransmit packet may due to packet loss or time-out invalid, receiving terminal still has part to retransmit, the packet opening repeat requests and re-transmission soon may cause the further deterioration of network condition, and can not current network condition be made moderate progress, now be not suitable for continuing to adopt AQR to solve Network Packet Loss, thus adopt other error control method to solve Network Packet Loss.If on the communication network of Bandwidth-Constrained, owing to sharing same communication network with other business, the current network traffics of other business possible are comparatively large, and total bandwidth is exceeded, and communication network bandwidth causes packet loss, this situation adopt open re-transmission soon can emphasis network congested.Therefore, the present embodiment in this case, stops ARQ, and adopts other error control method to solve, as step 206.
205: transmitting terminal obtains the initial packet loss of the communication network of receiving terminal feedback and adopts the second packet loss opened soon after repeat requests, and obtain the 3rd packet loss according to the initial packet loss of communication network and the second packet loss;
Particularly, by receiving the RTCP XR message of RTCP RR message and expansion, getting the initial packet loss of the communication network of receiving terminal feedback and adopting the second packet loss after opening repeat requests soon.Wherein, in RTCPRR message, carry the initial packet loss of communication network, in the RTCP XR message of expansion, carry the second packet loss after enabling ARQ.In the embodiment of the present invention by treatable for current ARQ the 3rd packet loss referred to as the 3rd packet loss.Particularly, the second packet loss after the initial packet loss of three packet loss=communication network-enable ARQ; The parameter opening repeat requests in the present embodiment soon at least comprises the number of times of re-transmission, continual data package dropout number etc., and the parameter that repeat requests is opened in adjustment soon specifically comprises raising and opens the parameter of repeat requests soon and reduce the parameter opening repeat requests soon;
206: transmitting terminal judges whether described 3rd packet loss is less than the 4th default packet loss, if to be less than and described 3rd packet loss is not 0, then improve the parameter opening repeat requests soon; If described 3rd packet loss is 0, then reduce the parameter opening repeat requests soon.
The treatable packet loss of ARQ is preset, by treatable for this ARQ the 4th packet loss referred to as the 4th packet loss in the embodiment of the present invention.
Particularly, if the 3rd packet loss < the 4th packet loss, and the 3rd packet loss is not 0, then can judge to adopt the mode opening repeat requests soon can solve packet loss problem in current network, and attempt improving ARQ parameter, namely improve the number of times of re-transmission, and improve continual data package dropout number; Preferably, the treatable packet loss of preset ARQ can be identical with the packet loss enabling ARQ preset, and also can be less than the default packet loss enabling ARQ.
If the 3rd packet loss is 0, then can judge that ARQ cannot solve the packet loss problem in current network, and attempt reducing ARQ parameter, namely reduce the number of times that ARQ retransmits, and reduce continual data package dropout number.
Below, the present embodiment is described the method for dynamic conditioning ARQ parameter by an object lesson:
Suppose the 4th packet loss=5% that the ARQ of initial preset can process, the number of times 2 that ARQ retransmits, continual data package dropout number 2.
If treatable 3rd packet loss=3% of current ARQ, initial packet loss=7% of communication network, then meet treatable 4th packet loss 5% of ARQ that the treatable 3rd packet loss 3%< of current ARQ is preset, and treatable 3rd packet loss of current ARQ is not 0, can judge that ARQ partly can solve the packet loss problem in current network, and attempt improving number of retransmissions, improve continual data package dropout number, as number of retransmissions risen to 3, continual data package dropout number rises to 3, is so more conducive to solving the Burst loss problem in network.
If treatable 3rd packet loss=0% of current ARQ, the initial packet loss of communication network is 7%, then can judge that ARQ cannot solve the packet loss problem in current network, and attempt reducing number of retransmissions, reduce continual data package dropout number, as number of retransmissions being reduced to 1, continual data package dropout number is reduced to 1, even lower, this avoid the idle percussion of ARQ to network.
207: the parameter feedback opening repeat requests soon after adjustment to receiving terminal, is carried out error control to make receiving terminal according to the parameter opening repeat requests soon after adjustment by transmitting terminal;
208: receiving terminal judges whether that enabling backward error correction PLC or forward error correction FEC carries out error control;
Particularly, whether receiving terminal is effective to the medium type of packet according to PLC, judges whether to enable PLC; In practical application, in the packet that receiving terminal receives, multiple media type (as video, audio frequency etc.) may be comprised, as effective to video type in PLC can be preset, effective to audio types, then can solve the problem of the packet loss of video type by using PLC.
209: if the medium type of PLC to packet is effective, then enable PLC and carry out error control, and feed back to transmitting terminal by enabling the 5th packet loss after PLC, to make transmitting terminal judge whether that enabling FEC carries out error control according to enabling the 5th packet loss after PLC, perform step 210; Otherwise, perform step 211.
Particularly, the packet loss after receiving terminal expansion RTCP XR message makes it carry to enable PLC, feeds back to transmitting terminal by expansion RTCP XR message by enabling the packet loss after PLC.The present embodiment, for the medium type that can be solved packet loss problem by PLC, enables PLC, and feeds back to transmitting terminal by enabling the RTCP XR message of the 5th packet loss after PLC by expansion, thus transmitting terminal can get the 5th packet loss after enabling PLC.
For the medium type that cannot be solved packet loss problem by PLC, then do not enable PLC, just feeding back to transmitting terminal by enabling the second packet loss after ARQ, making transmitting terminal judge whether to enable FEC according to enabling the second packet loss after ARQ.
Wherein, see Fig. 5, in the present embodiment, transmitting terminal sends RCP message to receiving terminal, receiving terminal is to the RTCP XR message (step 204 and 207) after transmitting terminal feedback RTCP RR message (step 202) and expansion, RCP message is used for transmitting RCP sequence number, RTCP RR message is used for the packet loss of feedback communication network, the present embodiment expands RTCP XR message on the basis of RFC 3611, for feeding back the packet loss after enabling ARQ and enabling the packet loss after PLC, the embodiment of the present invention does not limit the mode of expansion RTCP RR message, as long as the RTCP XR message met after expansion can carry the second packet loss after enabling ARQ and the 5th packet loss after enabling PLC, the embodiment of the present invention provides a kind of extended mode, as shown in Figure 6, block type (BT) is 8bits, represent that the packet loss Sort positioning carried in the RTCP XR message of expansion is 8, reserved is 8bits, represents reserved field, block length is the length of 16bits, representative domain, SSRC of source is 32bits, represents source mark, ARQ loss rate is 8bits, represents the packet loss after application ARQ, PLC loss rate is 8bits, represents the packet loss after using PLC.
210: transmitting terminal obtains the 5th packet loss after the employing PLC of receiving terminal feedback, and judges whether that enabling FEC carries out error control according to enabling the 5th packet loss after PLC;
Wherein, according to enabling the 5th packet loss after PLC, transmitting terminal judges whether that enabling FEC carries out error control, specifically comprises, and transmitting terminal judges whether the 5th packet loss after enabling PLC is 0, if not 0, then performs step 212.If transmitting terminal judges that the packet loss after enabling PLC is not 0, then show currently also there is packet loss, transmitting terminal will be enabled FEC and carry out error control.
211: according to enabling the second packet loss after ARQ, transmitting terminal judges whether that enabling FEC carries out error control;
Particularly, receiving terminal is only enabled ARQ and is carried out error control, and namely after the medium type of mode to packet of backward error correction is invalid, whether the second packet loss after what transmitting terminal judged that receiving terminal feeds back enable ARQ is 0, if not 0, then performs step 212.
212: transmitting terminal is enabled FEC and carried out error control.
Particularly, the packet loss of the preset communication network of transmitting terminal and the corresponding relation of FEC redundancy parameter, transmitting terminal is according to the packet loss of current communication network and this corresponding relation, obtain the FEC redundancy parameter that this current communication network packet loss is corresponding, and carry out error control according to this FEC redundancy parameter.
In practical application, if when receiving terminal adopts ARQ and PLC to carry out error control, current communication network packet loss is now specially initial packet loss-the second packet loss-five packet loss of communication network; If when receiving terminal only adopts ARQ to carry out error control, the initial packet loss that current communication network packet loss is now specially communication network deducts the second packet loss.
Further, transmitting terminal also can the corresponding relation of preset communication network packet loss, FEC redundancy parameter and communication network utilization, after transmitting terminal enables FEC, according to current communication network packet loss and this corresponding relation, obtain the FEC redundancy parameter that this current communication network packet loss is corresponding, thus carry out error control according to the FEC redundancy parameter of correspondence, current communication network utilization can be known.Wherein, communication network utilization refers to (packet-redundant data packets)/packet, the communication network utilization that the present embodiment is corresponding according to redundancy parameter, can know current communication network utilization.
See table 1, three intervals of the packet loss of the preset communication network of the present embodiment, each interval corresponding FEC redundancy parameter and communication network utilization, if current communication network packet loss drops on a certain threshold interval, just adopt corresponding redundancy parameter, carry out error control.
Table 1
| Communication network packet loss | FEC redundancy parameter | Communication network utilization |
| [packet loss 1, packet loss 2] | FEC_redundance_1 | Communication network utilization 1 |
| (packet loss 2, packet loss 3] | FEC_redundance_2 | Communication network utilization 2 |
| (packet loss 3, packet loss 4] | FEC_redundance_3 | Communication network utilization 3 |
The method that the present embodiment provides, by detecting the network delay of communication network and the packet loss of communication network, and fully utilizes multiple error control method according to network condition in real time; Receiving terminal is by expanding RTCPXR message to the packet loss after the control of transmitting terminal feedback error in addition, thus transmitting terminal and receiving terminal can judge that often kind of error control method is to anti-dropout effect simultaneously, and the parameter of the various error control method of dynamic conditioning, to adapt to the change of Network Packet Loss situation; The present embodiment, by automatically adjusting the parameter of various error control method, can reach under higher communication network utilization, reach better anti-dropout effect.
Embodiment 3
See Fig. 7, present embodiments provide a kind of receiving terminal, this receiving terminal comprises acquisition module 301, first judge module 302 and control module 303;
The initial packet loss of acquisition module 301 for obtaining communication network and the network delay of communication network;
First judge module 302 is for judging whether the initial packet loss of communication network is less than the first packet loss that repeat requests is opened in default enabling soon, and whether the network delay of communication network is less than default delay threshold;
Control module 303, for when the judged result of the first judge module 301 is for being, adopts the mode opening repeat requests soon to carry out error control.
Wherein, this receiving terminal also comprises feedback module, open the second packet loss after repeat requests soon for adding up employing, the second packet loss is fed back to transmitting terminal, open the parameter of repeat requests to make transmitting terminal soon according to the initial packet loss of communication network and the adjustment of the second packet loss.
Wherein, this receiving terminal also comprises receiver module and the second judge module, this receiver module is used for the parameter opening repeat requests soon that receiving end/sending end sends, and this parameter opening repeat requests is soon the parameter opening repeat requests soon that transmitting terminal adjusts according to the initial packet loss of communication network and the second packet loss; This second judge module be used for after the second packet loss is fed back to transmitting terminal by feedback module, judge the initial packet loss of communication network whether be greater than employing open repeat requests soon after the second packet loss;
Correspondingly, control module 303, also for when the judged result of the second judge module is for being, carries out error control according to the parameter opening repeat requests soon after adjustment; When the judged result of the second judge module is no, judge whether to adopt the mode of backward error correction or the mode of forward error correction to carry out error control.
Further, this control module 303 also comprises the first judging unit and the first control unit; First judging unit is for judging that whether the mode of backward error correction is effective to the medium type of packet; First control unit is used for when the judged result of the first judging unit is effective, backward error correction is adopted to carry out error control, and the 5th packet loss after adopting backward error correction is fed back to transmitting terminal, to make transmitting terminal according to the 5th packet loss adopted after backward error correction, judge whether to adopt the mode of forward error correction to carry out error control; When the judged result of the first judging unit is invalid, opens the second packet loss after repeat requests soon according to employing and judge whether to adopt the mode of forward error correction to carry out error control.
The receiving terminal that the present embodiment provides, comprehensively uses multiple error control method by the situation of change of network condition, and carries out error control according to the parameter of the various error control methods after dynamic conditioning, adapts to the change of Network Packet Loss situation; The present embodiment, by automatically adjusting the parameter of various error control method, can reach under higher communication network utilization, reach better anti-dropout effect.
Embodiment 4
See Fig. 8, embodiments provide a kind of transmitting terminal, this transmitting terminal comprises sending module 401, first acquisition module 402 and the first judge module 403;
Sending module 401 is for sending packet to receiving terminal;
First acquisition module 402 opens the second packet loss after repeat requests soon for the initial packet loss and employing obtaining the communication network of receiving terminal feedback, and obtains the 3rd packet loss according to the initial packet loss of communication network and the difference of the second packet loss;
First judge module 403, for judging whether the 3rd packet loss is less than the 4th default packet loss, if to be less than and the 3rd packet loss is not 0, then improves the parameter opening repeat requests soon; If the 3rd packet loss is 0, then reduce the parameter opening repeat requests soon.
Further, this transmitting terminal also comprises feedback module, for by adjustment after the parameter feedback opening repeat requests soon to receiving terminal.
Wherein, when the mode of backward error correction is effective to the medium type of packet, adopt after backward error correction carries out error control, this transmitting terminal also comprises the second acquisition module, the second judge module and control module;
Second acquisition module for obtain receiving terminal feedback the backward error correction of employing after the 5th packet loss;
Second judge module is also for judging whether the 5th packet loss after adopting backward error correction is 0;
Control module is used for when the judged result of judge module is no, adopts the mode of forward error correction to carry out error control.
Wherein, after the medium type of mode to packet of backward error correction is invalid, this transmitting terminal also comprises the 3rd judge module, and whether the 3rd judge module opens the second packet loss after repeat requests soon for the employing judging receiving terminal and feed back is 0; Correspondingly, control module, also for when the judged result of the 3rd judge module is no, adopts the mode of forward error correction to carry out error control.
Particularly, this control module also comprises control unit, for the corresponding relation of the packet loss of preset communication network and the redundancy parameter of forward error correction; Obtain the redundancy parameter of corresponding forward error correction according to the packet loss of current communication network and corresponding relation, and carry out error control according to the redundancy parameter of corresponding forward error correction.
The transmitting terminal that the present embodiment provides, multiple error control method is comprehensively used by the situation of change of network condition, and according to the initial packet loss of communication network and the situation of change of carrying out the packet loss after error control, the parameter of the various error control method of dynamic conditioning, to adapt to the change of Network Packet Loss situation; The present embodiment, by automatically adjusting the parameter of various error control method, can reach under higher communication network utilization, reach better anti-dropout effect.
Embodiment 5
See Fig. 9, the embodiment of the present invention additionally provides a kind of system of error control, and this system comprises receiving terminal 501 and transmitting terminal 502;
Wherein, receiving terminal 501 comprises acquisition module, the first judge module and control module; This acquisition module is used for the initial packet loss of obtaining communication network and the network delay of communication network; This first judge module is for judging whether the initial packet loss of communication network is less than the first packet loss that repeat requests is opened in default enabling soon, and whether the network delay of communication network is less than default delay threshold; This control module is used for when the judged result of the first judge module is for being, adopts the mode opening repeat requests soon to carry out error control;
Transmitting terminal 502 comprises sending module, the first acquisition module and the first judge module; This sending module is used for sending packet to receiving terminal; This first acquisition module opens the second packet loss after repeat requests soon for the initial packet loss and employing obtaining the communication network of receiving terminal feedback, and obtains the 3rd packet loss according to the initial packet loss of communication network and the difference of the second packet loss; This first judge module, for judging whether the 3rd packet loss is less than the 4th default packet loss, if to be less than and the 3rd packet loss is not 0, then improves the parameter opening repeat requests soon; If the 3rd packet loss is 0, then reduce the parameter opening repeat requests soon.
The system that the present embodiment provides, multiple error control method is comprehensively used by the situation of change of network condition, and according to the initial packet loss of communication network and the situation of change of carrying out the packet loss after error control, the parameter of the various error control method of dynamic conditioning, to adapt to the change of Network Packet Loss situation; The present embodiment, by automatically adjusting the parameter of various error control method, can reach under higher communication network utilization, reach better anti-dropout effect.
All or part of content in the technical scheme that above embodiment provides can be realized by software programming, and its software program is stored in the storage medium that can read, storage medium such as: the hard disk in computer, CD or floppy disk.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. a method for error control, is characterized in that, described method comprises:
The initial packet loss of obtaining communication network and the network delay of communication network;
Judge whether the initial packet loss of described communication network is less than the first packet loss that repeat requests is opened in default enabling soon, and whether the network delay of described communication network is less than default delay threshold;
If the initial packet loss of described communication network is less than the first packet loss that repeat requests is opened in default enabling soon, and network delay is less than default delay threshold, then the mode opening repeat requests is soon adopted to carry out error control;
Statistics adopts the second packet loss after opening repeat requests soon, and described second packet loss is fed back to transmitting terminal, opens the parameter of repeat requests to make transmitting terminal soon according to the initial packet loss of described communication network and described second packet loss adjustment.
2. the method for claim 1, is characterized in that, described described second packet loss is fed back to transmitting terminal after also comprise:
Receive the parameter opening repeat requests soon that described transmitting terminal sends, described parameter is the parameter opening repeat requests soon that transmitting terminal adjusts according to the initial packet loss of described communication network and described second packet loss;
Judge the initial packet loss of described communication network whether be greater than described employing open repeat requests soon after the second packet loss, if initial packet loss is greater than the second packet loss, the parameter opening repeat requests soon then sent according to described transmitting terminal carries out error control, otherwise, judge whether to adopt the mode of backward error correction or the mode of forward error correction to carry out error control.
3. method as claimed in claim 2, is characterized in that, described in judge whether to adopt the mode of backward error correction or the mode of forward error correction specifically to comprise:
Judge that whether the mode of backward error correction is effective to the medium type of packet, if effectively, backward error correction is then adopted to carry out error control, and the 5th packet loss after adopting backward error correction is fed back to transmitting terminal, to make transmitting terminal according to the 5th packet loss after the backward error correction of described employing, judge whether to adopt the mode of forward error correction to carry out error control; Otherwise, make transmitting terminal open the second packet loss after repeat requests soon according to described employing and judge whether to adopt the mode of forward error correction to carry out error control.
4. a method for error control, is characterized in that, described method comprises:
Packet is sent to receiving terminal;
Obtain the initial packet loss of the communication network of receiving terminal feedback and adopt the second packet loss after opening repeat requests soon, and obtaining the 3rd packet loss according to the initial packet loss of described communication network and the difference of described second packet loss;
Judge whether described 3rd packet loss is less than the 4th default packet loss, if the 3rd packet loss is less than the 4th default packet loss and described 3rd packet loss is not 0, then improve the parameter opening repeat requests soon; If described 3rd packet loss is 0, then reduce the parameter opening repeat requests soon.
5. method as claimed in claim 4, it is characterized in that, described method also comprises: by the parameter feedback opening repeat requests soon after adjustment to receiving terminal.
6. method as claimed in claim 4, is characterized in that, when the mode of backward error correction is effective to the medium type of packet, adopt after backward error correction carries out error control, described method also comprises:
Obtain the 5th packet loss after the backward error correction of employing of receiving terminal feedback;
Judge whether the 5th packet loss after the backward error correction of described employing is 0, if not 0, then adopt the mode of forward error correction to carry out error control.
7. method as claimed in claim 4, it is characterized in that, after the medium type of mode to packet of backward error correction is invalid, described method also comprises:
Judge employing that receiving terminal feeds back open repeat requests soon after the second packet loss whether be 0, if not 0, then adopt the mode of forward error correction to carry out error control.
8. method as claimed in claims 6 or 7, it is characterized in that, the mode of described employing forward error correction carries out error control, specifically comprises:
The corresponding relation of the packet loss of preset communication network and the redundancy parameter of forward error correction;
Obtain the redundancy parameter of corresponding forward error correction according to the packet loss of current communication network and described corresponding relation, and carry out error control according to the redundancy parameter of corresponding forward error correction.
9. a receiving terminal, is characterized in that, described receiving terminal comprises acquisition module, the second judge module, control module and feedback module;
Described acquisition module is used for the initial packet loss of obtaining communication network and the network delay of communication network;
Described second judge module is for judging whether the initial packet loss of described communication network is less than the first packet loss that repeat requests is opened in default enabling soon, and whether the network delay of described communication network is less than default delay threshold;
Described control module is used for when the judged result of described second judge module is for being, adopts the mode opening repeat requests soon to carry out error control;
Described feedback module opens the second packet loss after repeat requests soon for adding up employing, and described second packet loss is fed back to transmitting terminal, opens the parameter of repeat requests to make transmitting terminal soon according to the initial packet loss of described communication network and described second packet loss adjustment.
10. receiving terminal as claimed in claim 9, it is characterized in that, described receiving terminal also comprises receiver module and the 3rd judge module;
The parameter opening repeat requests soon that described receiver module sends for receiving described transmitting terminal, described parameter is the parameter opening repeat requests soon that transmitting terminal adjusts according to the initial packet loss of described communication network and described second packet loss;
Described 3rd judge module be used for after described second packet loss is fed back to transmitting terminal by described feedback module, judge the initial packet loss of described communication network whether be greater than described employing open repeat requests soon after the second packet loss;
Correspondingly, described control module, also for when the judged result of described 3rd judge module is for being, carries out error control according to the parameter opening repeat requests soon that receiver module receives; When the judged result of described 3rd judge module is no, judge whether to adopt the mode of backward error correction or the mode of forward error correction to carry out error control.
11. receiving terminals as claimed in claim 10, it is characterized in that, described control module also comprises the second judging unit and the second control unit;
Described second judging unit is for judging that whether the mode of backward error correction is effective to the medium type of packet;
Described second control unit is used for when the judged result of described second judging unit is effective, backward error correction is adopted to carry out error control, and the 5th packet loss after adopting backward error correction is fed back to transmitting terminal, to make transmitting terminal according to the 5th packet loss after the backward error correction of described employing, judge whether to adopt the mode of forward error correction to carry out error control; When the judged result of described second judging unit is invalid, opens the second packet loss after repeat requests soon according to described employing and judge whether to adopt the mode of forward error correction to carry out error control.
12. 1 kinds of transmitting terminals, is characterized in that, described transmitting terminal comprises sending module, the first acquisition module and the first judge module;
Described sending module is used for sending packet to receiving terminal;
Described first acquisition module opens the second packet loss after repeat requests soon for the initial packet loss and employing obtaining the communication network of receiving terminal feedback, and obtains the 3rd packet loss according to the initial packet loss of described communication network and the difference of described second packet loss;
Described first judge module is for judging whether described 3rd packet loss is less than the 4th default packet loss, if the 3rd packet loss is less than the 4th default packet loss and described 3rd packet loss is not 0, then improves the parameter opening repeat requests soon; If described 3rd packet loss is 0, then reduce the parameter opening repeat requests soon.
13. transmitting terminals as claimed in claim 12, it is characterized in that, described transmitting terminal also comprises feedback module, and described feedback module is used for the parameter feedback opening repeat requests soon after by adjustment to receiving terminal.
14. transmitting terminals as claimed in claim 12, it is characterized in that, when the mode of backward error correction is effective to the medium type of packet, adopt after backward error correction carries out error control, described transmitting terminal also comprises the second acquisition module, the second judge module and control module;
Described second acquisition module for obtain receiving terminal feedback the backward error correction of employing after the 5th packet loss;
Whether described second judge module is also 0 for the 5th packet loss after judging the backward error correction of described employing;
Described control module is used for when the judged result of described judge module is no, adopts the mode of forward error correction to carry out error control.
15. transmitting terminals as claimed in claim 12, is characterized in that, after the medium type of mode to packet of backward error correction is invalid, described transmitting terminal also comprises the 3rd judge module;
Whether described 3rd judge module opens the second packet loss after repeat requests soon for the employing judging receiving terminal and feed back is 0;
Correspondingly, control module, also for when the judged result of described 3rd judge module is no, adopts the mode of forward error correction to carry out error control.
16. transmitting terminals as described in claims 14 or 15, it is characterized in that, described control module also comprises control unit, for the corresponding relation of the packet loss of preset communication network and the redundancy parameter of forward error correction; Obtain the redundancy parameter of corresponding forward error correction according to the packet loss of current communication network and described corresponding relation, and carry out error control according to the redundancy parameter of corresponding forward error correction.
The system of 17. 1 kinds of error control, is characterized in that, described system comprises receiving terminal and transmitting terminal;
Described receiving terminal comprises acquisition module, the first judge module and control module; Described acquisition module is used for the initial packet loss of obtaining communication network and the network delay of communication network; Described first judge module is for judging whether the initial packet loss of described communication network is less than the first packet loss that repeat requests is opened in default enabling soon, and whether the network delay of described communication network is less than default delay threshold; Described control module is used for when the judged result of described first judge module is for being, adopts the mode opening repeat requests soon to carry out error control;
Described transmitting terminal comprises sending module, the first acquisition module and the first judge module; Described sending module is used for sending packet to receiving terminal; Described first acquisition module opens the second packet loss after repeat requests soon for the initial packet loss and employing obtaining the communication network of receiving terminal feedback, and obtains the 3rd packet loss according to the initial packet loss of described communication network and the difference of described second packet loss; Described first judge module is for judging whether described 3rd packet loss is less than the 4th default packet loss, if the 3rd packet loss is less than the 4th default packet loss and described 3rd packet loss is not 0, then improves the parameter opening repeat requests soon; If described 3rd packet loss is 0, then reduce the parameter opening repeat requests soon.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110127328.6A CN102790666B (en) | 2011-05-17 | 2011-05-17 | Error control method, receiving end, transmitting end and system |
| PCT/CN2012/075446 WO2012155821A1 (en) | 2011-05-17 | 2012-05-14 | Method, receiver, transmitter and system for error control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110127328.6A CN102790666B (en) | 2011-05-17 | 2011-05-17 | Error control method, receiving end, transmitting end and system |
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| CN102790666A CN102790666A (en) | 2012-11-21 |
| CN102790666B true CN102790666B (en) | 2015-04-08 |
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| WO (1) | WO2012155821A1 (en) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103916208B (en) * | 2012-12-31 | 2017-12-29 | 华为技术有限公司 | Key dithering, anti-loss treating method and device |
| CN103354615B (en) * | 2013-06-24 | 2015-04-15 | 西安交通大学 | Signal intensity based live video data transmission error control method |
| CN103957222A (en) * | 2014-05-20 | 2014-07-30 | 艾诺通信系统（苏州）有限责任公司 | Video transmission self-adaption method based on FEC algorithm |
| CN107864084B (en) * | 2016-09-22 | 2019-06-21 | 腾讯科技（深圳）有限公司 | The transmission method and device of data packet |
| WO2018054171A1 (en) | 2016-09-22 | 2018-03-29 | 腾讯科技（深圳）有限公司 | Calling method and device, computer storage medium, and terminal |
| CN106411481B (en) * | 2016-11-17 | 2019-03-08 | 河海大学常州校区 | Joint Error Control and clock synchronizing method and system in the sound communication of ocean |
| CN108965775A (en) * | 2017-05-25 | 2018-12-07 | 中兴通讯股份有限公司 | Method of adjustment, device and the storage medium of data packetloss processing strategie |
| CN109788509B (en) * | 2017-11-15 | 2023-03-10 | 华为技术有限公司 | Method and device for avoiding continuous data packet transmission failure |
| CN107979507A (en) * | 2017-11-21 | 2018-05-01 | 广州视源电子科技股份有限公司 | A kind of data transmission method, device, equipment and storage medium |
| CN112913199B (en) * | 2018-11-15 | 2023-01-10 | 深圳市欢太科技有限公司 | Data transmission method and related product |
| CN111800218B (en) * | 2019-04-08 | 2022-04-22 | 华为技术有限公司 | Data stream transmission method and equipment |
| CN110336645A (en) * | 2019-07-17 | 2019-10-15 | 广州市百果园信息技术有限公司 | Data transmission method, device, system, equipment and storage medium |
| CN112532341A (en) * | 2019-09-17 | 2021-03-19 | 青岛海信宽带多媒体技术有限公司 | Media data playing method and device |
| CN114374470A (en) * | 2020-10-15 | 2022-04-19 | 华为技术有限公司 | Data transmission method, system and computer readable storage medium |
| CN114499747B (en) * | 2020-11-09 | 2023-06-20 | 成都鼎桥通信技术有限公司 | Audio and video data processing method and device, electronic equipment and storage medium |
| CN112543296B (en) * | 2020-11-26 | 2023-04-07 | 中移（杭州）信息技术有限公司 | Delay control method, delay control device and network equipment |
| CN114051173B (en) * | 2021-10-09 | 2023-08-08 | 广州广哈通信股份有限公司 | RTP extension header-based video frame reliable transmission method, device and equipment |
| CN113992304A (en) * | 2021-10-26 | 2022-01-28 | 新华三信息安全技术有限公司 | Packet loss resistance rate updating method and device, electronic equipment and storage medium |
| CN114025389A (en) * | 2021-11-01 | 2022-02-08 | 网易（杭州）网络有限公司 | Data transmission method and device, computer equipment and storage medium |
| CN114337928A (en) * | 2021-12-30 | 2022-04-12 | 福州大学 | Real-time video transmission method based on ARQ and FEC self-adaptive selection |
| CN115189809B (en) * | 2022-07-07 | 2024-03-19 | 福州大学 | Heterogeneous network real-time video transmission ARQ and FEC mode selection method based on QOE |
| CN116321286B (en) * | 2023-03-13 | 2023-09-22 | 湖北华中电力科技开发有限责任公司 | Data deviation identification system applying intelligent algorithm |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552661A (en) * | 2009-03-26 | 2009-10-07 | 吕晓雯 | Method for error control |
| CN101588597A (en) * | 2009-07-01 | 2009-11-25 | 南京工业大学 | Control method of wireless streaming media self-adapting mixing FEC/ARQ based on Kalman filtering |
| EP2131518A2 (en) * | 2008-06-06 | 2009-12-09 | Fujitsu Limited | Retransmission method and transmitter and receiver thereof |
| CN101826937A (en) * | 2010-03-18 | 2010-09-08 | 常熟理工学院 | Link layer error control system suitable for next generation mobile Internet and method thereof |
-
2011
- 2011-05-17 CN CN201110127328.6A patent/CN102790666B/en not_active Expired - Fee Related
-
2012
- 2012-05-14 WO PCT/CN2012/075446 patent/WO2012155821A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2131518A2 (en) * | 2008-06-06 | 2009-12-09 | Fujitsu Limited | Retransmission method and transmitter and receiver thereof |
| CN101552661A (en) * | 2009-03-26 | 2009-10-07 | 吕晓雯 | Method for error control |
| CN101588597A (en) * | 2009-07-01 | 2009-11-25 | 南京工业大学 | Control method of wireless streaming media self-adapting mixing FEC/ARQ based on Kalman filtering |
| CN101826937A (en) * | 2010-03-18 | 2010-09-08 | 常熟理工学院 | Link layer error control system suitable for next generation mobile Internet and method thereof |
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