CN102065372B - Method for transmitting data in broadcast mode and related device - Google Patents
Method for transmitting data in broadcast mode and related device Download PDFInfo
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- CN102065372B CN102065372B CN200910238129.5A CN200910238129A CN102065372B CN 102065372 B CN102065372 B CN 102065372B CN 200910238129 A CN200910238129 A CN 200910238129A CN 102065372 B CN102065372 B CN 102065372B
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Abstract
The invention discloses a method for transmitting data in a broadcast mode and a related device, which are used for solving the problem that the prior art cannot save transmission resources of a broadcast network while ensuring the correctness of transmitted data. The method comprises the following steps that: a network side sends first data to a terminal in a broadcast mode, and receives a current parameter value, fed back by the terminal through a mobile communication network after receiving the first data, of a preset parameter of the terminal, wherein the preset parameter can reflect the data transmission quality of the broadcast network; and when sending second data to the terminal in the broadcast mode subsequently, the network side determines packet loss recovery data corresponding to the second data according to the parameter value fed back by the terminal, and sends the determined packet loss recovery data corresponding to the second data to the terminal through the mobile communication network.
Description
Technical field
The present invention relates to computer and communication technical field, relate in particular to a kind of method, a kind of network equipment and a kind of terminal equipment with broadcast mode transmission data.
Background technology
When reducing transmitted data on network, the follow-up not good problem of decoding effect during to transmitted decoding data of the receiving terminal that causes due to lost data packets or error of transmission, prior art has proposed multiple error-control schemes to improve the reliability of Internet Transmission.HARQ (ARQ, Auto Repeat Request) and forward error correction (FEC, Forward Error Correction) are the common schemes of two classes wherein.
The basic functional principle of ARQ is: the modes such as the check digit that receiving terminal comprises in the data that receive by calculating are judged and correctly received after data, must send an acknowledge message to transmitting terminal, otherwise transmitting terminal repeatedly sends to receiving terminal the data that sent by the retransmission time interval to be scheduled to.The advantage of this scheme is to ensure the correctness of transmitted data, but also can take on the other hand a large amount of Internet resources, cause the transmission time extend, especially correctly receive for receiving terminal the data that transmitting terminal sends, but due to HP M, transmitting terminal does not receive the situation of the corresponding acknowledge message of receiving terminal transmission, and data retransmission can be wasted limited Internet resources.
The general principle of FEC scheme is: transmitting terminal is in the time sending the data of required transmission, in the data of this required transmission, corresponding loss recovery or the redundant correcting data of affix send in the lump, receiving terminal is in the time there is mistake in the data of judging the required transmission receiving, can carry out data recovery and error correction according to the corresponding redundant correcting data that receive, thereby obtain correct data.Transmitting terminal can be determined by different coding methods and interleave depth corresponding redundant correcting data or the loss recovery data of data of the required transmission that can realize different pieces of information recovery effects grade (or being called FEC loss recovery grade).
In the time that network side sends data by radio network to terminal, due to the return path that does not have terminal to network side feedback information, packet drop when network side cannot be known radio network transmission data, thereby network side can only send to all terminals the identical loss recovery data of same FEC loss recovery grade.
Summary of the invention
The embodiment of the present invention provides a kind of method with broadcast mode transmission data, can only send to all terminals the identical loss recovery data of same FEC loss recovery grade in order to solve prior art, waste network transmission resource problem.
Accordingly, the embodiment of the present invention also provides a kind of network equipment and a kind of terminal equipment.
The technical scheme that the embodiment of the present invention provides is as follows:
With a method for broadcast mode transmission data, comprising:
Network side is handed down to terminal by the first data with broadcast mode; And
Receive described terminal and receiving after described the first data, the current parameter value of this terminal predefined parameter of feedback, described predefined parameter can reflect the radio network data transmission quality of terminal present position;
Network side while issuing the second data with broadcast mode to described terminal, according to the parameter value of described terminal feedback, is determined the loss recovery data that the second data are corresponding follow-up, and
Send loss recovery data corresponding to described the second data of determining to described terminal.
With a method for broadcast mode transmission data, comprising:
Terminal receives after the first data that network side issues with broadcast mode, determines the parameter value of self current predefined parameter, and described predefined parameter can reflected radio network data transmission quality; And
The parameter value of the predefined parameter of determining is sent to network side;
When described terminal receives follow-up the second data that issue with broadcast mode of network side, receive loss recovery data corresponding to described the second data that network side sends, described loss recovery data are that network side is determined according to the parameter value of the predefined parameter of terminal transmission; And
According to described loss recovery data, described the second data that receive are carried out to correction process.
A kind of network equipment, comprising:
The first transmitting element, for being handed down to terminal by the first data with broadcast mode;
Receiving element, is receiving after the first data of the first transmitting element transmission for receiving described terminal, the current parameter value of this terminal predefined parameter of feedback, and described predefined parameter can reflect the radio network data transmission quality of terminal present position;
Determining unit, for follow-up while issuing the second data with broadcast mode to described terminal, the parameter value of the described terminal feedback receiving according to receiving element, determines the loss recovery data that the second data are corresponding;
The second transmitting element, for sending to described terminal the corresponding loss recovery data of described the second data that determining unit is determined by described mobile radio communication.
A kind of terminal equipment, comprising:
Determining unit, for receiving after the first data that network side issues with broadcast mode, determines the parameter value of self current predefined parameter, and described predefined parameter can reflect the radio network data transmission quality of terminal present position;
Transmitting element, sends to network side for the parameter value of predefined parameter that determining unit is determined by mobile radio communication;
Receiving element, while being used for receiving follow-up the second data that issue with broadcast mode of network side, receive loss recovery data corresponding to described the second data that network side sends by described mobile radio communication, described loss recovery data are that network side is determined according to the parameter value of the predefined parameter of terminal transmission;
Loss recovery processing unit, carries out loss recovery processing for loss recovery data corresponding to described the second data that receive according to receiving element to described the second data that receive.
The scheme that the embodiment of the present invention provides by network side for each terminal, receive after the data that network side broadcast mode issues according to this terminal, the parameter value of the reflected radio network data transmission quality feeding back by mobile radio communication, determine follow-up while issuing data to this terminal with broadcast mode, the loss recovery data of the corresponding different FEC loss recovery grades that should issue, so that terminal is carried out correction process, thereby can be targetedly, for different terminals provides the loss recovery data of different level of error correction, realize under the condition of correctness of data that ensures required transmission, save the object of radio network transfer resource.
Brief description of the drawings
Fig. 1 is the main principle flow chart of realizing of the embodiment of the present invention;
Fig. 2 is the system configuration schematic diagram of the embodiment of the present invention;
Fig. 3 is the modular structure figure of network equipment in the embodiment of the present invention;
Fig. 4 is the modular structure figure of terminal equipment in the embodiment of the present invention;
Fig. 5 is the schematic diagram that the embodiment of the present invention is used RTP packet carrying loss recovery data;
The structural representation of the network equipment that Fig. 6 provides for the embodiment of the present invention;
The structural representation of the terminal equipment that Fig. 7 provides for the embodiment of the present invention.
Embodiment
In order to ensure the correctness of radio network transmission data, network side can only such as, in the time issuing the data (video data etc.) of required transmission by radio network to all terminals at present, additional same loss recovery data in the data of this required transmission simultaneously, because the communication quality of the radio network of different geographical there are differences, if network side is for the correctness of the data of the required transmission that ensures the user of the poor region of radio network communication quality and receive, select to send the higher FEC loss recovery grade corresponding to data of required transmission, the loss recovery data that data volume is more, so for the preferably user in territory of radio network communication quality, waste valuable radio network transfer resource, otherwise, if network side is in order to save radio network transfer resource, select to send corresponding lower FEC loss recovery grade, the less loss recovery data of data volume of data of required transmission, for the user of the poor region of radio network communication quality, cannot recover according to the loss recovery data that receive the data of the required transmission of satisfactory quality so.
Therefore, prior art network side cannot be targetedly, for different terminals provides the loss recovery data of different level of error correction, thereby under the condition of correctness of data that ensures required transmission, saves radio network transfer resource.
The embodiment of the present invention proposes terminal after receiving the data of the required transmission such as video data that network side issues by broadcast mode, according to the check code in the data that receive, determine the radio network communication quality information that self is current, and the radio network communication quality information of determining is sent to network side by the message of mobile radio communication, the radio network communication quality information that network side feeds back by receiving terminal, in the time of the data of the required transmission such as subsequent transmission video data, the radio network communication quality information feeding back respectively according to different terminals, send targetedly the loss recovery data of different FEC loss recovery grades for different terminals.For example, for the radio network communication quality loss recovery data that preferably lower grade of terminal transmission FEC loss recovery, data volume is less, for the poor terminal of radio network communication quality sends the loss recovery data that higher grade of FEC loss recovery, data volume is larger, thereby realize under the condition of correctness of data that can ensure required transmission, save radio network transfer resource.
Below in conjunction with each accompanying drawing, embodiment of the present invention technical scheme main realized to principle, embodiment and the beneficial effect that should be able to reach is explained in detail.
As shown in Figure 1, to realize principle process as follows for the embodiment of the present invention main:
Step 10, network side is handed down to terminal by the first data with broadcast mode;
Step 20, described terminal is receiving after the first data that in step 10, network side issues, the parameter value of determining self current predefined parameter, described predefined parameter can reflect the radio network data transmission quality of terminal present position, can be packet loss, the error rate etc.;
Step 30, the parameter value that described terminal is determined step 20 sends to network side, for example by modes such as mobile radio communication (signaling, message, short message etc.), cable networks, the parameter value of determining is sent to network side;
Step 40, network side, in the time of follow-up second data that need to issue to described terminal with broadcast mode, according to the parameter value of step 30 terminal feedback, is determined the loss recovery data that the second data are corresponding;
Step 50, network side in the time issuing the second data with broadcast mode, loss recovery data corresponding to described the second data of determining to described terminal forwarding step 40.
Please refer to accompanying drawing 2, the fundamental diagram with network equipment and terminal equipment in the system of broadcast mode transmission data providing for the embodiment of the present invention.
Accompanying drawing 3 is the modular structure figure of network equipment in the embodiment of the present invention, has indicated data flow in the figure in the mode of arrow; Accompanying drawing 4 is the modular structure figure of terminal equipment in the embodiment of the present invention, indicated data flow in the mode of arrow in the figure, the flow direction that wherein hollow arrow is video data, the flow direction, the fine line arrow that fine dotted line arrow is loss recovery data are the flow direction of terminal feedback data.Below by according to foregoing invention principle of the present invention, by reference to the accompanying drawings 3, accompanying drawing 4 and instantiation be explained in detail and illustrate the main principle that realizes of the inventive method.
The data that network side is handed down to each terminal by broadcast mode can be various types of data, comprise data of video data, voice data, picture format etc., and the present embodiment is introduced as an example of video data example.
Network side will obtain multiple video datas after encoding to video file, comprise the first video data, the second video data and the 3rd video data, and the first video data is handed down to terminal A, terminal B with broadcast mode by radio network.For example, the first video data can be carried in the packet of the form that meets the host-host protocol that possesses time marking and sequence identification and send to terminal, for example be carried in the packet that meets real time transport protocol (RTP, Real-time Transport Protocol) form or other transmission format protocol and send to terminal.
After terminal A decodes to the first video data that receives network side and issue with broadcast mode, by obtain packet sequence number mark, calculate the modes such as the check digit that comprises in the first video data, the parameter value of determining the predefined parameter that packet loss, the error rate etc. can reflected radio network data transmission qualities, it is 0.5% that for example terminal A determines current packet loss.
A is similar with terminal, after terminal B decodes to the first video data that receives network side and issue with broadcast mode, by obtain packet sequence number mark, calculate the modes such as the check digit that comprises in the first video data, the parameter value of determining the predefined parameter that packet loss, the error rate etc. can reflected radio network data transmission qualities, it is 5% that for example terminal B determines current packet loss.
Then terminal A, terminal B feed back to network side by mobile radio communication by the parameter value of the predefined parameter of determining respectively, for example terminal A is carried on " packet loss=0.5% " determined meet RTP Control Protocol (RTCP, RTP Control Protocol) send to network side in the packet of form, terminal B is carried on " packet loss=5% " determined in the packet that meets RTCP form and sends to network side.
Network side receives after the parameter value of the predefined parameter that terminal A, terminal B feed back respectively, from the range of parameter values of pre-stored described predefined parameter and the corresponding relation of FEC loss recovery grade, select FEC loss recovery grade that the parameter value of terminal A feedback is corresponding and the FEC loss recovery grade corresponding to parameter value of terminal B feedback.Conventionally, for in the time that radio network data transmission quality is poor, should adopt higher FEC loss recovery grade, network side storing has the corresponding relation of multiple packet loss scopes and FEC loss recovery grade, for example " packet loss=0.5%～2% " correspondence " FEC loss recovery grade 1 ", " packet loss=2%～5% " correspondence " FEC loss recovery grade 2 ", " packet loss=5%～10% " correspondence " FEC loss recovery grade 3 ", " packet loss=10%～20% " correspondence " FEC loss recovery class 4 " etc., the information of " packet loss=0.5% " that network side is sent according to the terminal A receiving, from above-mentioned corresponding relation, select " packet loss=0.5% " and answer corresponding " FEC loss recovery grade 1 ", selecting " packet loss=5% " should correspondence " FEC loss recovery grade 3 ".
Network side is follow-up need to send the second video data to mobile terminal A, terminal B time, according to above-mentioned " the FEC loss recovery grade 1 " selected, the second video data is carried out to FEC coding processing procedure corresponding to " FEC loss recovery grade 1 ", determine the loss recovery data FECdata1 that the second video data is corresponding; And according to " the FEC loss recovery grade 3 " selected, the second video data is carried out to FEC coding processing procedure corresponding to " FEC loss recovery grade 3 ", determine the loss recovery data FECdata3 that the second video data is corresponding.
Then, network side is in the time sending the second data with broadcast mode to terminal A, terminal B, send loss recovery data FECdata1 corresponding to the second video data determining by mobile radio communication to terminal A, send loss recovery data FECdata3 corresponding to the second video data determining to terminal B.For example, network side can be carried on loss recovery data FECdata1 to meet real time transport protocol (RTP, Real-time Transport Protocol) send to terminal A in the packet of form, loss recovery data FECdata3 is carried on and in the packet that meets RTP form, sends to terminal B.Please refer to shown in accompanying drawing 5, the header part of loss recovery data and payload segment are all attached to the payload segment of RTP packet.
For each terminal, video data and corresponding loss recovery data are transmitted respectively.Transmit loss recovery data and video data by the independent rtp streaming separating, the RTP data of loss recovery Deta bearer are surrounded by self special serial number space.
For make terminal at one time section receive in the situation of multiple video datas and loss recovery data, can determine the corresponding relation between video data and loss recovery data, network side should carry the information that can determine correlation between the two in the loss recovery data of video data and correspondence.Taking temporal information as example, network side sends to the timestamp of 3 packets that carry the second video data of terminal A to be respectively timestamp1=00:01:25, timestamp1=00:01:26, timestamp1=00:01:27, network side should additional temporal information be 00:01:25 in the loss recovery data FECdata1 that sends to terminal A, 00:01:26 or 00:01:27, or the time span scope [00:01:25 that additional temporal information is determined for carrying the timestamp of 3 packets of the second video data in the loss recovery data FECdata1 that sends to terminal A, 00:01:27], additional temporal information can be also the time span scope [00:01:25 determining, 00:01:27] in arbitrary moment.Visible, the temporal information of carrying in the packet of the temporal information of carrying in loss recovery data and carrying video data has correlation.
Terminal receives after the video data that network side issues with broadcast mode and the loss recovery data that issue by mobile radio communication, obtain the temporal information in the timestamp of the packet that carries video data and the packet of carrying loss recovery data, thereby determine loss recovery data corresponding to video data, carry out the synchronous of video data stream and redundant data stream.According to corresponding loss recovery data, video counts is carried out to data recovery and correction process.
Taking the second video data as example, terminal A obtains the timestamp of 3 packets that carry the second video data that the network side that receives issues: the temporal information [00:01:25 carrying in the RTP packet of timestamp1=00:01:25, timestamp1=00:01:26, timestamp1=00:01:27 and carrying loss recovery data FECdata1,00:01:27], can determine loss recovery data FECdata1 is the loss recovery data that the second video data is corresponding.Suppose that terminal A has also received another loss recovery and counted FECdata2, get the temporal information [00:02:20 carrying in the RTP packet of carrying loss recovery data FECdata2, 00:02:27], due to the temporal information [00:02:20 of packet of carrying FECdata2, 00:02:27] the time span scope [00:01:25 that do not determine at the timestamp of 3 packets that carries the second video data, 00:01:27] in, neither [00:01:25, 00:01:27] in arbitrary moment, therefore determining loss recovery data FECdata2 is not the loss recovery data that the second video data is corresponding.
The embodiment of the present invention is receiving after the first data that network side issues with broadcast mode by terminal, feed back the parameter value of the reflected radio such as packet loss, the error rate network data transmission quality of self to network side, network side is for each terminal, according to the parameter value of the reflected radio network data transmission quality of this terminal feedback, determine follow-up while issuing the second data to this terminal with broadcast mode, the FEC loss recovery grade of the loss recovery data that should simultaneously issue.Network side is follow-up while issuing the second data with broadcast mode to multiple terminals, send the loss recovery data of different level of error correction to different terminals by mobile radio communication, for the terminal of broadcast data transmission better quality, can issue the loss recovery data that level of error correction is lower, data volume is less, thereby save network transmission resource; For the poor terminal of radio network data transmission quality, can issue the loss recovery data that level of error correction is higher, data volume is more, thereby ensure the correctness of the second data that user receives.Therefore, the scheme that the embodiment of the present invention proposes can be targetedly, for different terminals provides the loss recovery data of different level of error correction.
Correspondingly, the embodiment of the present invention also provides a kind of network equipment, and as shown in Figure 6, this device comprises the first transmitting element 601, receiving element 602, determining unit 603 and the second transmitting element 604, specific as follows:
The first transmitting element 601, for being handed down to terminal by the first data with broadcast mode;
Receiving element 602, is receiving after the first data that the first transmitting element 601 sends for receiving described terminal, the current parameter value of this terminal predefined parameter of feedback, and described predefined parameter can reflected radio network data transmission quality;
Determining unit 603, for follow-up while sending the second data with broadcast mode to described terminal, the parameter value of the described terminal feedback receiving according to receiving element 602, determines the loss recovery data that the second data are corresponding;
The second transmitting element 604, for sending to described terminal the corresponding loss recovery data of described the second data that determining unit 603 is determined by described mobile radio communication.
Correspondingly, please refer to accompanying drawing 7, the embodiment of the present invention has also proposed a kind of terminal equipment, comprises determining unit 701, transmitting element 702, receiving element 703 and loss recovery processing unit 704, wherein:
Determining unit 701, for receiving after the first data that network side issues with broadcast mode, determines the parameter value of self current predefined parameter, and described predefined parameter can reflected radio network data transmission quality;
Transmitting element 702, sends to network side for the parameter value of predefined parameter that determining unit 701 is determined by mobile radio communication;
Receiving element 703, while being used for receiving follow-up the second data that issue with broadcast mode of network side, receive loss recovery data corresponding to described the second data that network side sends by described mobile radio communication, described loss recovery data are that network side is determined according to the parameter value of the predefined parameter of terminal transmission;
Loss recovery processing unit 704, carries out loss recovery processing for loss recovery data corresponding to described the second data that receive according to receiving element 703 to described the second data that receive.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (10)
1. with a method for broadcast mode transmission data, it is characterized in that, comprising:
Network side is handed down to terminal by the first data with broadcast mode; And
Receive described terminal and receiving after described the first data, the current parameter value of this terminal predefined parameter of feedback, described predefined parameter can reflect the radio network data transmission quality of terminal present position;
Network side while issuing the second data with broadcast mode to described terminal, according to the parameter value of described terminal feedback, is determined the loss recovery data that the second data are corresponding follow-up, and
Send the loss recovery data of determining to described terminal;
Wherein, network side, according to the parameter value of described terminal feedback, is determined the loss recovery data that the second data are corresponding, specifically comprises:
The FEC loss recovery grade that network side is corresponding according to the parameter value of terminal feedback, determine the loss recovery data that the second data are corresponding, the FEC loss recovery grade that described parameter value is corresponding is that network side receives after the parameter value of described terminal feedback, from the range of parameter values of pre-stored described predefined parameter and the corresponding relation of FEC loss recovery grade, selects.
2. the method for claim 1, is characterized in that, network side identifies the corresponding relation of described the second data and described loss recovery data in the following manner:
Network side carries the information for determining described the second data and described loss recovery data corresponding relation in described the second data and corresponding loss recovery data.
3. method as claimed in claim 2, is characterized in that, described information is temporal information.
4. method as claimed in claim 3, it is characterized in that, the temporal information that network side carries in described loss recovery data is the arbitrary moment in time range or the described time range of determining according to the temporal information of carrying in the packet of carrying the second data.
5. the method for claim 1, is characterized in that, described predefined parameter is packet loss or the error rate.
6. the method for claim 1, is characterized in that, the host-host protocol of described network side based on possessing time marking and sequence identification sends described loss recovery data to described terminal.
7. with a method for broadcast mode transmission data, it is characterized in that, comprising:
Terminal receives after the first data that network side issues with broadcast mode, determines the parameter value of self current predefined parameter, and described predefined parameter can reflected radio network data transmission quality; And
The parameter value of the predefined parameter of determining is sent to network side;
When described terminal receives follow-up the second data that issue with broadcast mode of network side, receive loss recovery data corresponding to described the second data that network side sends, described loss recovery data are that network side is determined according to the parameter value of the predefined parameter of terminal transmission; And
According to described loss recovery data, described the second data that receive are carried out to correction process;
Wherein, when described terminal receives the second data that network side issues with broadcast mode, receive loss recovery data corresponding to described the second data that network side sends, specifically comprise:
Described terminal is obtained the temporal information of all packets in the packet that carries the second data receiving, and
Obtain the temporal information in the loss recovery data that receive, and
When temporal information in the loss recovery data that get is the arbitrary moment in time range or the described time range of determining according to the temporal information of carrying in the packet of carrying the second data, the loss recovery data that receive described in determining are loss recovery data corresponding to described the second data.
8. method as claimed in claim 7, is characterized in that, the packet of described terminal based on meeting RTP Control Protocol, sends to network side by the parameter value of the predefined parameter of determining.
9. a network equipment, is characterized in that, comprising:
The first transmitting element, for being handed down to terminal by the first data with broadcast mode;
Receiving element, is receiving after the first data of the first transmitting element transmission for receiving described terminal, the current parameter value of this terminal predefined parameter of feedback, and described predefined parameter can reflect the radio network data transmission quality of terminal present position;
Determining unit, for follow-up while issuing the second data with broadcast mode to described terminal, the parameter value of the described terminal feedback receiving according to receiving element, determines the loss recovery data that the second data are corresponding;
The second transmitting element, for sending to described terminal the corresponding loss recovery data of described the second data that determining unit is determined by mobile radio communication;
Wherein, described determining unit is specifically for the FEC loss recovery grade corresponding according to the parameter value of terminal feedback, determine the loss recovery data that the second data are corresponding, the FEC loss recovery grade that described parameter value is corresponding is that network side receives after the parameter value of described terminal feedback, from the range of parameter values of pre-stored described predefined parameter and the corresponding relation of FEC loss recovery grade, selects.
10. a terminal equipment, is characterized in that, comprising:
Determining unit, for receiving after the first data that network side issues with broadcast mode, determines the parameter value of self current predefined parameter, and described predefined parameter can reflect the radio network data transmission quality of terminal present position;
Transmitting element, sends to network side for the parameter value of predefined parameter that determining unit is determined by mobile radio communication;
Receiving element, while being used for receiving follow-up the second data that issue with broadcast mode of network side, receive loss recovery data corresponding to described the second data that network side sends by described mobile radio communication, described loss recovery data are that network side is determined according to the parameter value of the predefined parameter of terminal transmission;
Loss recovery processing unit, carries out loss recovery processing for loss recovery data corresponding to described the second data that receive according to receiving element to described the second data that receive;
Wherein, described receiving element is specifically for obtaining the temporal information of all packets in the packet that carries the second data receiving, and
Obtain the temporal information in the loss recovery data that receive, and
When temporal information in the loss recovery data that get is the arbitrary moment in time range or the described time range of determining according to the temporal information of carrying in the packet of carrying the second data, the loss recovery data that receive described in determining are loss recovery data corresponding to described the second data.
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| CN105337682B (en) * | 2014-05-26 | 2018-10-12 | 联想(北京)有限公司 | A kind of method and device of transmission data |
| CN104104597B (en) * | 2014-08-06 | 2015-08-12 | 腾讯科技（深圳）有限公司 | A kind of data transmission method, Apparatus and system |
| CN106506551A (en) * | 2016-12-28 | 2017-03-15 | 桂林龙隐科技有限公司 | The adaptive feedback method and device of wireless WiFi multi-media broadcasting systems |
| CN108965934B (en) | 2017-05-27 | 2021-01-29 | 华为技术有限公司 | Fault detection method, monitoring equipment and network equipment |
| CN110336804B (en) * | 2019-06-25 | 2021-10-08 | 歌尔科技有限公司 | Multimedia file recovery method, device and equipment |
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| CN1870468A (en) * | 2005-11-30 | 2006-11-29 | 华为技术有限公司 | Method for implementing group broadcasting service of multi-media broadcast |
| CN1969475A (en) * | 2005-03-25 | 2007-05-23 | 桥扬科技有限公司 | Methods and apparatus for cellular broadcasting and communication system |
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| CN1969475A (en) * | 2005-03-25 | 2007-05-23 | 桥扬科技有限公司 | Methods and apparatus for cellular broadcasting and communication system |
| CN1870468A (en) * | 2005-11-30 | 2006-11-29 | 华为技术有限公司 | Method for implementing group broadcasting service of multi-media broadcast |
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