CN102082624A - WiFi coding optimization method and system thereof - Google Patents
WiFi coding optimization method and system thereof Download PDFInfo
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- CN102082624A CN102082624A CN2009102242979A CN200910224297A CN102082624A CN 102082624 A CN102082624 A CN 102082624A CN 2009102242979 A CN2009102242979 A CN 2009102242979A CN 200910224297 A CN200910224297 A CN 200910224297A CN 102082624 A CN102082624 A CN 102082624A
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Abstract
The present invention relates to a WiFi (Wireless Fidelity) coding optimization method, including the steps of: providing channel information and electric program menus for a client through a transmitting server; initiating a transmitting request to join in by the client; determining whether the signal quality can meet predetermined requirements when the client receives a media data packet, if not, initiating a transmitting request to join in a FEC (Forward Error Correction) flow; the client carrying out a verification on the media data packet according to an FEC data packet after receiving the FEC data packet, and then reorganizing the media data packet. The invention also relates to a WiFi coding optimization system. The application of the invention can improve the correctness of the media data reception by avoiding the use of packet loss retransmission mechanism, enhance the usage rate of broadband, and reduce the terminal power consumption. At the same time, the cost reduction can be realized because the verification data is sent through business layer and a hardware modification is unnecessary.
Description
Technical field
The present invention relates to signal transfer encoding technical field, relate in particular to the method and system that the signal transfer encoding is optimized in a kind of WiFi data broadcasting.
Background technology
The situation of error code can take place owing to be subjected to the influence that wireless environment disturbs in the WiFi broadcasting multicast service under the more weak environment of signal strength signal intensity.Owing to there are not technology correction transfer encodings such as forward error correction in the WiFi standard, the user that regulation utilizes the mode of regulations speed to adapt under the different reception environments in 802.11 agreements receives, and improves the accuracy that receives data.When the data that receive were wrong, the network interface card of receiving terminal was in the data link layer request retransmission, but retransmission process meeting waste bandwidth, the loss terminal power.
In order to overcome the defective of retransmission process, 802.11e agreement has increased the processing of processed and modulating layer at the MAC layer, and support the FEC of RS to encode, but these processing modes of 802.11e agreement can not obtain the support of the AP of 802.11 agreements (for example 802.11a or 802.11b agreement) based on other, therefore exist certain hardware-dependent, if carry out the processing mode of existing 802.11e agreement, then need to change existing network, realize that cost is higher.
Summary of the invention
The objective of the invention is to propose a kind of WiFi code optimization method and system, can under the situation of not using the packet loss retransmission mechanism, improve the correctness that media data receives, improve the bandwidth utilization rate, reduce power consumption of terminal, reduce simultaneously and realize cost.
For achieving the above object, the invention provides a kind of WiFi code optimization method, may further comprise the steps:
Propagation server provides channel information and electric program menu to client, same channel in the described channel information comprises the first service channel information and the second service channel information, corresponding video flowing and forward error correction respectively (Forward Error Correction is called for short FEC) stream;
After the user selected channel according to described electric program menu, described client was sent and is added the request of propagation, and the described first service channel information that comprises corresponding video flowing in the request is propagated in described adding;
Described client is when receiving the media data packet of first service channel transmission, judge whether signal quality meets pre-provisioning request, if do not meet, then send the propagation request that adds forward error correction stream, the propagation request of described adding forward error correction stream comprises the second service channel information of corresponding forward error correction stream;
Described client is carried out verification according to described forward error correction data bag to described media data packet behind the forward error correction data bag that receives the transmission of second service channel, and the described media data packet of recombinating.
For achieving the above object, the invention provides a kind of WiFi code optimization system, comprising:
Comprise propagation server, streaming media server, forward error correction server and client side, wherein,
Propagation server is used for providing channel information and electric program menu to described client, and the same channel in the described channel information comprises the first service channel information and the second service channel information, respectively corresponding video flowing and forward error correction stream;
Streaming media server is used for propagating request according to the adding of the described client that receives, by first service channel to described client transmissions media data packet;
The forward error correction server is used for then sending the forward error correction data bag corresponding with described media data packet to described client according to the propagation request that receives the adding forward error correction stream that described client sends by second service channel;
Client, be used for after the user selects channel according to described electric program menu, send and add the request of propagation, the described first service channel information that comprises corresponding video flowing in the request is propagated in described adding, and when receiving the media data packet of described first service channel transmission, judge whether signal quality meets pre-provisioning request, if do not meet, then send the propagation request that adds forward error correction stream, the propagation request of described adding forward error correction stream comprises the second service channel information of corresponding forward error correction stream, and behind the forward error correction data bag that receives described second service channel transmission, according to described forward error correction data bag described media data packet is carried out verification, and the described media data packet of recombinating.
Based on technique scheme, the present invention provides Media Stream and FEC stream by different service channels, whether terminal can receive the FEC data according to the signal quality decision that receives data, if signal quality is bad, then can requires to receive the FEC data and carry out verification and reorganization.Can not use the packet loss retransmission mechanism to improve the correctness that media data receives by the present invention, and improve the bandwidth utilization rate, reduce power consumption of terminal, simultaneously owing to send checking data by operation layer, do not need existing hardware is changed, therefore reduced the realization cost.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the schematic flow sheet of an embodiment of WiFi code optimization method of the present invention.
Fig. 2 is the schematic flow sheet of another embodiment of WiFi code optimization method of the present invention.
Fig. 3 is the signalling diagram of the another embodiment of WiFi code optimization method of the present invention.
Fig. 4 is the signalling diagram of an embodiment again of WiFi code optimization method of the present invention.
Fig. 5 is the application scenarios schematic diagram of an embodiment of WiFi code optimization of the present invention system.
Fig. 6 is the application scenarios schematic diagram of another embodiment of WiFi code optimization of the present invention system.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
As shown in Figure 1, be the schematic flow sheet of an embodiment of WiFi code optimization method of the present invention.In the present embodiment, the transfer of data flow process of WiFi code optimization may further comprise the steps:
In the present embodiment, propagation server is when providing channel information, the channel information of video flowing both was provided, also provide and be used for the channel information of FEC stream of this video flowing of verification, client is when the media data packet of receiver, video stream, if the quality of reception is relatively good, then can FEC stream not received, if the quality of reception is poor, then the channel information that can flow according to the FEC that propagation server provides carries out the reception of FEC packet, according to the FEC packet media data packet is carried out verification and reorganization again.
Existing data transfer mode is a medium volume data normally, or in a passage simultaneously transmission of media data and FEC data, all there is certain limitation in this dual mode, the mode of medium volume data does not consider whether the signal environment of the client of receiver side can present by the complete of support media information, and the mode of transmission of media data and FEC data then can increase the redundant data and the amount of calculation of transmission course simultaneously in a passage.Present embodiment is than existing data transfer mode, adopt two independent logical passages to carry out transfer of data, client can select whether to receive the FEC data according to the situation of signal environment, this has just overcome the defective of existing mode, not only guaranteed the correctness of media data transmission, also improve bandwidth availability ratio, reduced the processing consumption of end side.
In addition, the FEC data are transmitted by operation layer in the present embodiment, therefore do not need to consider the support of MAC layer, this considers in the prior art that with regard to having been avoided the MAC modulation system can not get the problem of the support of the network equipment, and then expanded range of application of the present invention, reduced the present invention program's implementation cost.
The first service channel information of mentioning in the present embodiment can be made as the address information (for example URL information etc.) of Media Stream, and the second service channel information is the address information (for example URL information etc.) of FEC stream.First service channel and second service channel are respectively independently logical channel, but can be carried in same physical channel or the different physical channel.
Propagation server in the present embodiment can be multicast server or broadcasting server, accordingly, adding the request of propagation can be for adding multicast request or adding broadcast request, and the propagation request that adds FEC stream can be multicast request that adds FEC stream or the broadcast request that adds FEC stream.
As shown in Figure 2, be the schematic flow sheet of another embodiment of WiFi code optimization method of the present invention.Compare with a last embodiment, present embodiment can also comprise step 100 before step 101, and promptly propagation server generates corresponding FEC stream according to Media Stream after receiving the Media Stream that streaming media server provides, and FEC stream can store the FEC server into.Propagation server can write the multicast address or the broadcast address of streaming media server and FEC server in the channel information when generating channel information and electric program menu, and by electric program menu the media resource of streaming media server is offered the user.
Below by two embodiment muticast data transmission flow process and broadcast data transmission flow process based on WiFi code optimization method of the present invention are described respectively.As shown in Figure 3, be the signalling diagram of the another embodiment of WiFi code optimization method of the present invention.Present embodiment may further comprise the steps:
Consider that the portable terminal that client is installed can consume more battery power usually when sending upstream data, and existing re-transmission mode needs frequent to send repeat requests to remedy packet loss and Cuo Bao, increased power consumption of mobile terminals, and the embodiment of the invention only needs client according to the signal reception condition, send the accurate reception that few signaling just can be finished media data to network side, both guarantee the accuracy of Data Receiving, also reduced mobile terminal power consumption significantly.
As shown in Figure 4, be the signalling diagram of an embodiment again of WiFi code optimization method of the present invention.Compare with a last embodiment, replace multicast server by broadcasting server in the present embodiment, add multicast request accordingly and replace with the adding broadcast request, the multicast request that adds FEC stream replaces with the broadcast request that adds FEC stream.Just has not given unnecessary details here with last similar with the step 201 among the embodiment～207 step 301 in the idiographic flow～307.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
For realizing aforesaid WiFi code optimization method, the present invention also provides a kind of WiFi code optimization system, comprise propagation server, streaming media server, FEC server and client side, wherein, propagation server is used for providing channel information and electric program menu to client, same channel in the channel information comprises the first service channel information and the second service channel information, respectively corresponding video flowing and FEC stream.Streaming media server is used for propagating request according to the adding of the client that receives, by first service channel to the client transmissions media data packet.The FEC server is used for then sending the FEC packet corresponding with media data packet to client according to the propagation request that receives the adding FEC stream that client sends by second service channel.
Client is responsible for after the user selects channel according to electric program menu, send and add the request of propagation, add the first service channel information that comprises corresponding video flowing in the request of propagation, and when receiving the media data packet of first service channel transmission, judge whether signal quality meets pre-provisioning request, if do not meet, then send the propagation request that adds FEC stream, the propagation request that adds FEC stream comprises the second service channel information of corresponding FEC stream, and behind the FEC packet that receives the transmission of second service channel, according to the FEC packet media data packet is carried out verification, the group media packet of laying equal stress on.
Client can specifically comprise following module: the media data request module, be used for after the user selects channel according to electric program menu, sending to add to propagate and asking, and add the first service channel information that comprises corresponding video flowing in the request of propagation; The signal quality judge module is used for judging whether signal quality meets pre-provisioning request when receiving the media data packet of first service channel transmission; The checking data request module is used for when signal quality does not meet pre-provisioning request, sends the propagation request that adds FEC stream, and the propagation request that adds FEC stream comprises the second service channel information of corresponding FEC stream; The verification recombination module is used for according to the FEC packet media data packet being carried out verification, the group media packet of laying equal stress on behind the FEC packet that receives the transmission of second service channel.
In Fig. 5, propagation server is a multicast server 1.Streaming media server 2 can be according to the adding multicast request of the client that receives, by first service channel to the client transmissions media data packet.FEC server 3 can then send the FEC packet corresponding with media data packet to client by second service channel according to the multicast request that receives the adding FEC stream that client sends.Comprise two clients (customer end A and B) among Fig. 5, carried out information interaction by the network equipment and multicast server 1 respectively.
In Fig. 6, propagation server is a broadcasting server 4.Streaming media server 2 can be according to the adding broadcast request of the client that receives, by first service channel to the client transmissions media data packet.FEC server 3 can then send the FEC packet corresponding with media data packet to client by second service channel according to the broadcast request that receives the adding FEC stream that client sends.Comprise two clients (customer end A and B) among Fig. 6, carried out information interaction by the network equipment and broadcasting server 4 respectively.
In the above-described embodiments, the first service channel information and the second service channel information can be respectively the address information of the address information of Media Stream and FEC stream, and first service channel and second service channel can be in same physical channels or the carrying of different physical channels.
Further, in propagation server, can also comprise the checking data generation module, be used for after receiving the Media Stream that streaming media server provides, generate corresponding forward error correction stream according to described Media Stream.
The present invention provides Media Stream and FEC stream by different service channels, and whether terminal can receive the FEC data according to the signal quality decision that receives data, if signal quality is bad, then can requires to receive the FEC data and carry out verification and reorganization.Can not use the packet loss retransmission mechanism to improve the correctness that media data receives by the present invention, and improve the bandwidth utilization rate, reduce power consumption of terminal, simultaneously owing to send checking data by operation layer, do not need existing hardware is changed, therefore reduced the realization cost.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present invention; And not breaking away from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (12)
1. WiFi code optimization method may further comprise the steps:
Propagation server provides channel information and electric program menu to client, and the same channel in the described channel information comprises the first service channel information and the second service channel information, respectively corresponding video flowing and forward error correction stream;
After the user selected channel according to described electric program menu, described client was sent and is added the request of propagation, and the described first service channel information that comprises corresponding video flowing in the request is propagated in described adding;
Described client is when receiving the media data packet of first service channel transmission, judge whether signal quality meets pre-provisioning request, if do not meet, then send the propagation request that adds forward error correction stream, the propagation request of described adding forward error correction stream comprises the second service channel information of corresponding forward error correction stream;
Described client is carried out verification according to described forward error correction data bag to described media data packet behind the forward error correction data bag that receives the transmission of second service channel, and the described media data packet of recombinating.
2. WiFi code optimization method according to claim 1, wherein in described propagation server before client provides channel information and electric program menu, also comprise:
Described propagation server generates corresponding forward error correction stream according to described Media Stream after receiving the Media Stream that streaming media server provides.
3. WiFi code optimization method according to claim 1 wherein before described client is receiving the media data packet of first service channel transmission, also comprises:
The network equipment is set up according to the described adding request of propagating and is transmitted, and described client is added described transmitting.
4. according to the arbitrary described WiFi code optimization method of claim 1～3, the wherein said first service channel information is the address information of described Media Stream, the described second service channel information is the address information of described forward error correction stream, and described first service channel is carried on same physical channel or different physical channels with second service channel.
5. WiFi code optimization method according to claim 4, wherein said propagation server is a multicast server, and described adding is propagated request for adding multicast request, and the propagation request of described adding forward error correction stream is for adding the multicast request of forward error correction stream.
6. WiFi code optimization method according to claim 4, wherein said propagation server is a broadcasting server, and described adding is propagated request for adding broadcast request, and the propagation request of described adding forward error correction stream is for adding the broadcast request of forward error correction stream.
7. a WiFi code optimization system comprises propagation server, streaming media server, forward error correction server and client side, wherein,
Propagation server is used for providing channel information and electric program menu to described client, and the same channel in the described channel information comprises the first service channel information and the second service channel information, respectively corresponding video flowing and forward error correction stream;
Streaming media server is used for propagating request according to the adding of the described client that receives, by first service channel to described client transmissions media data packet;
The forward error correction server is used for then sending the forward error correction data bag corresponding with described media data packet to described client according to the propagation request that receives the adding forward error correction stream that described client sends by second service channel;
Client, be used for after the user selects channel according to described electric program menu, send and add the request of propagation, the described first service channel information that comprises corresponding video flowing in the request is propagated in described adding, and when receiving the media data packet of described first service channel transmission, judge whether signal quality meets pre-provisioning request, if do not meet, then send the propagation request that adds forward error correction stream, the propagation request of described adding forward error correction stream comprises the second service channel information of corresponding forward error correction stream, and behind the forward error correction data bag that receives described second service channel transmission, according to described forward error correction data bag described media data packet is carried out verification, and the described media data packet of recombinating.
8. WiFi code optimization according to claim 7 system, wherein said propagation server also comprises:
The checking data generation module is used for after receiving the Media Stream that streaming media server provides, and generates corresponding forward error correction stream according to described Media Stream.
9. WiFi code optimization according to claim 7 system, wherein said client specifically comprises:
The media data request module is used for after the user selects channel according to described electric program menu, sends to add the request of propagation, and the described first service channel information that comprises corresponding video flowing in the request is propagated in described adding;
The signal quality judge module is used for judging whether signal quality meets pre-provisioning request when receiving the media data packet of described first service channel transmission;
The checking data request module is used for when described signal quality does not meet pre-provisioning request, sends the propagation request that adds forward error correction stream, and the propagation request of described adding forward error correction stream comprises the second service channel information of corresponding forward error correction stream;
The verification recombination module is used for according to described forward error correction data bag described media data packet being carried out verification behind the forward error correction data bag that receives described second service channel transmission, and the described media data packet of recombinating.
10. according to the arbitrary described WiFi code optimization of claim 7～9 system, the wherein said first service channel information is the address information of described Media Stream, the described second service channel information is the address information of described forward error correction stream, and described first service channel is carried on same physical channel or different physical channels with second service channel.
11. WiFi code optimization according to claim 10 system, wherein said propagation server is a multicast server, and described adding is propagated request for adding multicast request, and the propagation request of described adding forward error correction stream is for adding the multicast request of forward error correction stream.
12. WiFi code optimization according to claim 10 system, wherein said propagation server is a broadcasting server, and described adding is propagated request for adding broadcast request, and the propagation request of described adding forward error correction stream is for adding the broadcast request of forward error correction stream.
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| CN103002481A (en) * | 2012-12-14 | 2013-03-27 | 福建省邮电工程有限公司 | Wireless fidelity (WIFI) network optimization based on complex environment |
| CN107026710A (en) * | 2016-01-06 | 2017-08-08 | 谷歌公司 | Dynamic forward error correction is bypassed in digital communication system |
| CN107210755A (en) * | 2015-01-27 | 2017-09-26 | 华为技术有限公司 | A kind of device and method of FEC decodings |
| CN108141230A (en) * | 2015-09-16 | 2018-06-08 | 沃高公司 | For optimizing the method for transmitting video data stream in the wireless network |
| CN110248257A (en) * | 2018-03-07 | 2019-09-17 | 华为技术有限公司 | Data transmission method, device, network access equipment and storage medium |
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| CN103002481A (en) * | 2012-12-14 | 2013-03-27 | 福建省邮电工程有限公司 | Wireless fidelity (WIFI) network optimization based on complex environment |
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| CN108141230A (en) * | 2015-09-16 | 2018-06-08 | 沃高公司 | For optimizing the method for transmitting video data stream in the wireless network |
| CN107026710A (en) * | 2016-01-06 | 2017-08-08 | 谷歌公司 | Dynamic forward error correction is bypassed in digital communication system |
| CN107026710B (en) * | 2016-01-06 | 2020-05-22 | 谷歌有限责任公司 | Method for improving communication, gateway and unmanned aerial vehicle |
| CN110248257A (en) * | 2018-03-07 | 2019-09-17 | 华为技术有限公司 | Data transmission method, device, network access equipment and storage medium |
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Application publication date: 20110601 |