WO2019170065A1

WO2019170065A1 - Method and device for data transmission, network access device, and storage medium

Info

Publication number: WO2019170065A1
Application number: PCT/CN2019/076910
Authority: WO
Inventors: 汪伊明; 罗勇
Original assignee: 华为技术有限公司
Priority date: 2018-03-07
Filing date: 2019-03-05
Publication date: 2019-09-12
Also published as: CN110248257A; CN110248257B

Abstract

The present application relates to the technical field of communications. Provided are a method and device for data transmission, a network access device, and a storage medium. The method for data transmission comprises: a network access device intercepts channel parameter information issued by a service server to a user terminal, detects whether the channel parameter information instructs the user terminal to turn on a forward error correction (FEC) receiving function; if the channel parameter information does not instruct the user terminal to turn on the FEC receiving function, then the network access device acquires a network performance parameter of data communication between the service server and the user terminal; the network access device detects whether the network performance parameter satisfies a network performance degradation criterion; and if the network performance parameter satisfies the network performance degradation criterion, then the network access device controls the user terminal to turn on the FEC receiving function. The utilization of the technical solution of the present application prevents image frames from being lost, thus increasing the service quality of IPTV.

Description

Data transmission method, device, network access device and storage medium

Technical field

The present application relates to the field of communications technologies, and in particular, to a data transmission method, apparatus, network access device, and storage medium.

Background technique

Internet Protocol Television (IPTV) is a new technology that uses the Internet to integrate Internet, multimedia, and communication technologies to provide a variety of interactive services, including digital TV. The data is transmitted by the business party device to the user terminal. For example, if the service device provides an image service to the user terminal, the service device sends an image frame to the user terminal. Image frames can be classified into three types according to encoding, which are I frames, P frames, and B frames. Wherein, the I frame is a completely encoded frame. The P frame is generated for the I frame before the reference P frame and to the frame including the difference portion encoded with the I frame. The B frame is a frame generated by the frame before and after the reference B frame.

At this stage, IPTV mainly uses the User Datagram Protocol (UDP) multicast method to transmit image frames. However, the loss of image frames may occur during the transmission of image frames. For example, Wireless Fidelity (WiFi) is used to carry IPTV services in the home network. Due to the poor anti-interference ability of WiFi itself, the signal stability is poor. The random packet loss rate of the WiFi transmission data is high, and the possibility of image frame loss is increased. The loss of the I frame in the transmitted image frame will result in a black screen for a long time, and the loss of the P frame will result in a blooming screen, which reduces the service quality of the IPTV.

Summary of the invention

The present application provides a data transmission method, apparatus, network access device, and storage medium, which can avoid losing image frames, thereby improving the service quality of the IPTV.

In a first aspect, the application provides a data transmission method, including: the network access device intercepts channel parameter information sent by the service server to the user terminal, and detects whether the channel parameter information indicates that the user terminal turns on the forward error correction FEC receiving function; If the channel parameter information does not indicate that the user terminal enables the FEC receiving function, the network access device acquires network performance parameters for data communication between the service server and the user terminal; and the network access device detects whether the network performance parameter satisfies the network performance deterioration condition; if the network performance If the parameter meets the network performance deterioration condition, the network access device controls the user terminal to enable the FEC receiving function.

The service server and the user terminal transmit data through the WiFi, and the network access device intercepts the channel parameter information sent by the service server, and detects whether the channel parameter information indicates that the user terminal starts the FEC receiving function. If it is determined that the channel parameter information does not indicate that the user terminal starts the FEC receiving function, the network access device acquires the network performance parameter, and determines whether to control the user terminal to open the FEC receiving function according to the network performance parameter. Ensure that the user terminal can enable the FEC receiving function in the case of poor network performance in the WiFi environment, and recover the lost media data packet between the service server and the user terminal by using the FEC packet received after the FEC receiving function is enabled. Avoid losing image frames, which improves the service quality of IPTV.

In some embodiments of the first aspect, the channel parameter information includes an FEC-enabled port identifier, and the network access device controls the user terminal to enable the FEC receiving function, including: the network access device adds a valid port identifier to the channel parameter information, and the valid port The port identifier of the port in the user terminal that supports the FEC receiving function is enabled; and the channel parameter information of the valid port identifier is sent to the user terminal; or the network access device does not support the FEC that enables the FEC receiving function in the channel parameter information. The port identifier is enabled, and is modified to the port identifier of the port in the user terminal that supports the FEC receiving function. The channel parameter information including the modified FEC-enabled port identifier is sent to the user terminal.

By adding a valid port identifier or modifying the port identifier to a port identifier of a port that supports the FEC receiving function, the user terminal can identify the valid port identifier or the port identifier of the port that supports the FEC receiving function, and activate the corresponding port identifier. The port or the port that supports the FEC receiving function, so as to receive the media data packet sent by the service server to the user terminal and the FEC packet obtained by the network access device for FEC encoding, and transmit the lost media data packet between the service server and the user terminal. restore.

In some embodiments of the first aspect, the network performance parameter includes a network quality parameter, and the network performance degradation condition includes a network quality degradation condition.

The network quality is evaluated by the network quality. In the case of deteriorating network quality, the user terminal is controlled to enable the FEC receiving function to recover the lost media data packet between the service server and the user terminal. Avoid losing image frames, which improves the service quality of IPTV.

In some embodiments of the first aspect, the network performance parameter includes a network quality parameter and a network congestion parameter, and the network performance deterioration condition includes a network quality deterioration condition and a network patency condition; if the network performance parameter satisfies the network performance deterioration condition, the network access The device controls the user terminal to enable the FEC receiving function, including: if the network quality parameter satisfies the network quality deterioration condition, and the network congestion parameter satisfies the network patency condition, the network access device controls the user terminal to enable the FEC receiving function.

The network performance is evaluated by network quality and network patency. When the network quality deteriorates and the network conditions allow redundant data transmission, the user terminal is controlled to enable the FEC receiving function, and the lost media data packet is transmitted between the service server and the user terminal. restore. Avoid losing image frames, which improves the service quality of IPTV.

In some embodiments of the first aspect, the data transmission method further includes: the network access device obtaining a network quality level based on the network quality parameter, where the network quality level includes a first network quality level and a second network quality level, the first network The network quality characterized by the quality level is higher than the network quality characterized by the second network quality level; the network access device sets the FEC encoding parameter according to the network quality level, and the FEC encoding parameter is used for the FEC encoding of the network access device, and the first network quality level The packet loss recovery rate of the corresponding FEC encoding parameter is lower than the packet loss recovery rate of the FEC encoding parameter corresponding to the second network quality level.

Through the network quality level, the FEC code is adjusted to adjust the packet loss recovery rate to achieve a balance between data recovery and resource occupation.

In some embodiments of the first aspect, the data transmission method further includes: the network access device obtaining a network congestion level based on the network congestion parameter, where the network congestion level includes a first congestion level and a second congestion level, and the first network congestion level The characterized network congestion degree is higher than the network congestion level characterized by the second network congestion level; the network access device sets the FEC coding parameter according to the network congestion level, and the FEC coding parameter is used for the network access device to perform FEC coding, and the first network congestion level The packet loss recovery rate of the corresponding FEC encoding parameter is lower than the packet loss recovery rate of the FEC encoding parameter corresponding to the second network congestion level.

The FEC code is adjusted through the network congestion level to adjust the packet loss recovery rate to avoid the situation that the packet loss recovery rate is too high and the bandwidth is increased due to the excessive bandwidth in the congestion environment, thereby achieving the balance between data recovery and bandwidth occupation.

In some embodiments of the first aspect, the FEC encoding parameters include a number of media packets and a number of FEC packets.

In some embodiments of the first aspect, the data transmission method further includes: performing, by the network access device, FEC encoding.

In a second aspect, the present application provides a data transmission apparatus, including: an information intercepting module, configured to intercept channel parameter information sent by a service server to a user terminal, and detecting whether channel parameter information indicates that the user terminal turns on forward error correction FEC receiving The parameter obtaining module is configured to: when the channel parameter information does not indicate that the user terminal starts the FEC receiving function, obtain the network performance parameter of the data communication between the service server and the user terminal; and the detecting module is configured to detect whether the network performance parameter satisfies the network performance. Deteriorating condition; the control module is configured to control the user terminal to enable the FEC receiving function when the network performance parameter satisfies the network performance deterioration condition.

In some embodiments of the second aspect, the channel parameter information includes an FEC-enabled port identifier, and the control module is specifically configured to: add a valid port identifier to the channel parameter information, where the valid port identifier is a port in the user terminal that supports the FEC receiving function. The port identifier is sent to the user terminal, and the control module is specifically configured to: modify the FEC-enabled port identifier that does not support the FEC receiving function in the channel parameter information, and modify the identifier into the user terminal. Supporting the port identifier of the port that enables the FEC receiving function; and transmitting the channel parameter information including the modified FEC-enabled port identifier to the user terminal.

In some embodiments of the second aspect, the network performance parameter includes a network quality parameter, and the network performance degradation condition includes a network quality degradation condition.

In some embodiments of the second aspect, the network performance parameter includes a network quality parameter and a network congestion parameter, and the network performance deterioration condition includes a network quality deterioration condition and a network patency condition; and the control module is specifically configured to: when the network quality parameter satisfies the network quality deterioration If the network congestion condition satisfies the condition of the network, the network access device controls the user terminal to enable the FEC receiving function.

In some embodiments of the second aspect, the control module is further configured to: obtain, according to the network quality parameter, a network quality level, where the network quality level includes a first network quality level and a second network quality level, and the network characterized by the first network quality level The quality is higher than the network quality characterized by the second network quality level; according to the network quality level, the FEC encoding parameter is set, and the FEC encoding parameter is used for FEC encoding, and the packet loss recovery rate of the FEC encoding parameter corresponding to the first network quality level is lower than the first The packet loss recovery rate of the FEC encoding parameter corresponding to the network quality level.

In some embodiments of the second aspect, the control module is further configured to: obtain a network congestion level based on the network congestion parameter, where the network congestion level includes a first network congestion level and a second play congestion level, and the first network congestion level is characterized. The network congestion level is higher than the network congestion level characterized by the second network congestion level; the FEC coding parameter is set according to the network congestion level, the FEC coding parameter is used for FEC coding, and the packet loss recovery rate of the FEC coding parameter corresponding to the first network congestion level is used. The packet loss recovery rate of the FEC encoding parameter corresponding to the second network congestion level.

In some embodiments of the second aspect, the FEC encoding parameters include a number of media packets and a number of FEC packets.

In some embodiments of the second aspect, the data transmission apparatus further includes: an encoding module, configured to perform FEC encoding.

In a third aspect, the present application provides a network access device, including a memory, a processor, and a program stored on the memory and executable on the processor, and the data transmission method in the above technical solution is implemented when the processor executes the program.

In a fourth aspect, the present application provides a storage medium on which a program is stored, and when the program is executed by the processor, the data transmission method in the above technical solution is implemented.

DRAWINGS

FIG. 1 is a schematic diagram of a data transmission application scenario in an embodiment of the present application;

2 is a flowchart of a data transmission method according to an embodiment of the present application;

3 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present application;

4 is a schematic structural diagram of a data transmission apparatus according to another embodiment of the present application;

FIG. 5 is a schematic structural diagram of hardware of a network access device according to an embodiment of the present application.

Detailed ways

The embodiment of the present application provides a data transmission method, device, network access device, and storage medium, which can be applied to an IPTV service, such as an IPTV live broadcast service. FIG. 1 is a schematic diagram of a data transmission application scenario in an embodiment of the present application. As shown in FIG. 1, the data transmission system includes a service server 11, a network access device 12, and a user terminal 13. The service server 11 can be a head end server of the IPTV, and the program of the channel is saved on the service server. The service server 11 may specifically be a device such as a remote server. The network access device 12 may specifically be an optical network terminal (ONT), a gateway, a wireless access point (AP), and the like. The user terminal 13 may specifically be a device such as a set top box (STB). The user terminal 13 transmits a channel list to the service server 11 via Hypertext Transfer Protocol (HTTP) using Wireless Fidelity (WiFi). The channel list can include a channel identification. After receiving the channel list, the service server 11 can transmit the channel parameter information corresponding to the channel list to the user terminal 13 through the HyperText Transfer Protocol (HTTP) by using Wireless Fidelity (WiFi). Specifically, the channel parameter information may be encapsulated in the packet by the service server 11. The channel parameter information may include channel parameters. The user terminal 13 determines the manner of receiving the image data of the channel corresponding to the channel parameter information based on the channel parameter in the channel parameter information. In the embodiment of the present application, the network access device 12 can intercept the channel parameter information that is sent by the service server 11 to the user terminal 13. Even if the channel parameter information sent by the service server 11 to the user terminal 13 does not indicate that the user terminal 13 turns on the Forward Error Correction (FEC) receiving function, if the network performance parameter satisfies the network performance deterioration condition, the user terminal 13 is required to enable the FEC. Receiving function, the network access device 12 can also control the user terminal 13 to enable the FEC receiving function.

FIG. 2 is a flowchart of a data transmission method according to an embodiment of the present application. As shown in FIG. 2, the data transmission method may include step S201 and step S204.

In step S201, the network access device intercepts channel parameter information that is sent by the service server to the user terminal.

The detecting channel parameter information may be used to indicate that the user terminal turns on the FEC receiving function. The channel parameter information may include a channel identifier, a channel path, an FEC enable identifier, and an FEC enable port identifier. The channel identifier is used to identify the channel, for example, the channel identifier can be represented by a number, a letter or a mixed string of numbers and letters, and the like. The channel path is the path that the channel plays on the network. The channel path can be represented by a channel's Uniform Resource Locator (URL). Specifically, the unicast channel path, the multicast channel path, and the HTTP channel path may be classified according to different propagation modes. For example, the format of the multicast channel path can be igmp://multicast address:port. The format of the unicast channel path can be "rtsp://unicast address: port". The format of the HTTP channel path can be "http://service address:port/path". If the service server does not have the channel, the channel path can be represented by "NULL". The FEC enable identifier is used to identify whether the user terminal is required to enable the FEC receiving function. The FEC enabled port identifier is used to identify the port identifier of the FEC encoded data stream. If the channel corresponding to the channel parameter information does not support FEC, the FEC enable port identifier can be represented by "NULL". Alternatively, if the channel corresponding to the channel parameter information does not support FEC, the FEC enable identifier and the FEC receive port identifier are not set in the channel parameter information.

The network access device intercepts the channel parameter information and can parse the channel parameter information. The FEC enable identifier determined by the parsing determines whether the user terminal is required to enable the FEC receiving function. Determining, according to the parsed FEC receiving port identifier, a port number used by the user terminal to receive the FEC encoded data stream including the FEC packet. In one example, the network access device may transmit a data stream including FEC encoding using a Real-time Transport Protocol (RTP). Specifically, the network access device may forward the media data packet sent by the service server to the user terminal through one data stream, and may also send the FEC packet generated by the FEC encoding through another data stream.

In step S202, if the channel parameter information does not indicate that the user terminal turns on the FEC receiving function, the network access device acquires network performance parameters for data communication between the service server and the user terminal.

Network performance parameters are used to characterize network performance. For example, network performance parameters can characterize whether network performance is degraded. If the network performance deteriorates, in order to ensure that the loss of image frames is avoided, the mobile terminal can be controlled to enable the FEC reception function. In one example, the network performance parameters can include network quality parameters. Network quality parameters are used to characterize network quality. Specifically, the network quality parameter may include parameters such as a packet loss rate. For example, the network quality parameters of the Medium Access Control (MAC) and/or the Physical Layer (PHY) may be detected for a period of time. In another example, the network performance parameters can include network performance parameters and network congestion parameters. Network congestion parameters can be used to characterize the congestion of the network. Specifically, the network congestion parameter may include air interface throughput, the number of air interfaces connected to the network access device (also referred to as the number of air interface STAs), the number of PHY avoidances, the number of queue messages, the air interface negotiation rate, the instantaneous throughput, and the PHY appearance. One or more of the parameters such as the number of errors. The PHY evasion number refers to the number of neighbor network access devices that are in the same space as the network access device that is transmitting data. In the same space, one network access device sends data, and other network access devices in the control are in a waiting state. The access congestion parameter is the congestion parameter associated with the network access device. The number of packets in the queue of the base station refers to the number of packets in the queue sent by the network access device. The air interface negotiation rate refers to the air interface negotiation rate of the network access device to the user terminal. Specifically, the air interface negotiation rate may include the sending rate and the receiving rate of the network access device to the user terminal. Instantaneous throughput refers to the instantaneous throughput of data transmitted by a network access device to a user terminal. For example, the network congestion parameters of the MAC and/or PHY over a period of time can be detected.

In step S203, the network access device detects whether the network performance parameter satisfies the network performance deterioration condition.

The network performance deterioration condition is a condition that limits the deterioration of network performance. If the network performance parameter satisfies the network performance deterioration condition, it is determined that the performance of the network between the service server and the user terminal is deteriorated, and packet loss is highly likely to occur. In one example, the network performance parameters include network quality parameters corresponding to network performance parameters, and network performance degradation conditions include network quality degradation conditions. In another example, the network performance parameters include network quality parameters and network congestion parameters, corresponding to network performance parameters, and network performance degradation conditions include network quality degradation conditions and network patency conditions. The network quality deterioration condition corresponds to the network quality parameter, and the network patency condition corresponds to the network congestion parameter.

In step S204, if the network performance parameter satisfies the network performance deterioration condition, the network access device controls the user terminal to enable the FEC receiving function.

Since the packet loss rate is high in the WiFi environment, the network access device can control the user terminal to enable the FEC receiving function even if the channel parameter information does not indicate that the user terminal turns on the FEC receiving function. Moreover, the network access device may perform FEC encoding, and send the encoded FEC packet corresponding to the media data packet that the service server wants to send to the user terminal to the user terminal. The channel parameter information indicates that the user terminal turns on the FEC receiving function, and the network access device does not need to control the user terminal. When receiving the channel parameter information indicating that the user terminal turns on the FEC receiving function, the user terminal can enable the FEC receiving function.

The user terminal enables the FEC receiving function to receive the FEC packet obtained by the FEC encoding, and recovers all or part of the lost media data packet through the FEC packet and the unrecovered media data packet, thereby reducing the packet loss rate and improving the user terminal. Data integrity. For example, the service server sends three media data packets to the user terminal, and the three media data packets are the media data package a, the media data package b, and the media data package c, respectively. The network access device performs FEC encoding, and obtains an FEC packet f(ab) that can be used to recover the media data packet a or the recovery media data packet b, and an FEC packet that can be used to recover the media data packet b or the recovery media data packet c (bc ). If the data packet a is lost in the media data packet received by the user terminal, the media data packet a can be recovered according to the received media data packet b and the FEC packet f(ab).

In one example, the channel parameter information includes an FEC enabled port identification. The network access device can detect whether the port of the user terminal corresponding to the FEC-enabled port identifier supports the FEC receiving function. If the FEC-enabled port identifier does not support the FEC receiving function, the network access device may add a valid port identifier to the channel parameter information. The valid port identifier is a port identifier of a port in the user terminal that supports the FEC receiving function. The channel parameter information to which the valid port identifier is added is sent to the user terminal. The user terminal receives the channel parameter information with the valid port identifier added, and if the valid port identifier is identified, the port corresponding to the valid port identifier is activated, so that the media data packet sent by the service server to the user terminal and the network access device are FEC encoded. FEC package.

In another example, the channel parameter information includes an FEC enabled port identification. The network access device can detect whether the port of the user terminal corresponding to the FEC-enabled port identifier supports the FEC receiving function. If the FEC-enabled port identifier does not support the FEC receiving function, the network access device does not support the FEC-enabled port identifier that does not support the FEC receiving function in the channel parameter information, and is modified to the port of the user terminal that supports the FEC receiving function. Logo. The channel parameter information including the modified FEC enabled port identifier is sent to the user terminal. The user terminal receives the channel parameter information including the modified FEC-enabled port identifier, and if the modified FEC-enabled port identifier is identified, the port corresponding to the modified FEC-enabled port identifier is activated, and the receiving service server sends the information to the user. The media data packet of the terminal and the FEC packet obtained by the FEC encoding by the network access device.

According to the specific content of the network performance parameter, it is specifically determined whether the network access device controls the user terminal to enable the FEC receiving function.

In one example, the network performance parameters include network quality parameters, and the network performance degradation conditions include network quality degradation conditions. The network quality deterioration condition is a condition for judging whether the quality of the network between the service server and the user terminal is deteriorated. If the network quality parameter satisfies the network quality deterioration condition, it may be determined that the network quality between the service server and the user terminal is deteriorated, and the network performance may be deteriorated. In order to avoid loss of image frames caused by packet loss, the network access device can control the user terminal to enable the FEC receiving function. The network access device can also perform FEC encoding. For example, network quality parameters include packet loss rate. The network quality deterioration condition is that the packet loss rate is greater than the security packet loss rate. The safe packet loss rate can be determined experimentally or empirically and is not limited herein. If the network access device determines that the packet loss rate is greater than the security packet loss rate, it proves that the network quality of the network between the service server and the user terminal is poor, and the user terminal needs to enable the FEC receiving function, so that the user terminal can use the FEC receiving function to recover. Lost media packets.

For example, the network access device can also obtain a network quality level based on network quality parameters. The network quality level includes a first network quality level and a second network quality level. The network quality characterized by the first network quality level is higher than the network quality characterized by the second network quality level. It should be noted that the first network quality level and the second network quality level are two relative levels. For example, if the network quality is ranked from superior to poor according to the corresponding network quality, the network quality level A1, the network quality level A2, and the network quality level A3 are obtained. For the network quality level A1 and the network quality level A2, the network quality level A1 is the first network quality level, and the network quality level A2 is the second network quality level. For the network quality level A2 and the network quality level A3, the network quality level A2 is the first network quality level, and the network quality level A3 is the second network quality level. For the network quality level A1 and the network quality level A3, the network quality level A1 is the first network quality level, and the network quality level A3 is the second network quality level. The network access device sets the FEC encoding parameters according to the network quality level. For example, the packet loss rate corresponding to the first network quality level is lower than the packet loss rate corresponding to the second network quality level.

The network access device performs FEC encoding, and needs to set FEC encoding parameters, and the FEC encoding parameters are used for FEC encoding by the network access device. The FEC coding parameters may include a media packet number M and a FEC packet number N, and the FEC encoding parameters may further include an association matrix. The sum of the number of media packets of one packet for FEC encoding output and the number of FEC packets is M+N. For example, if the number of media packets is M=4 and the number of FEC packets is N=3, the total number of packets (including media packets and FEC packets) of one packet outputted is 7. The media data packets are respectively a media data packet a, a media data packet b, a media data packet c, and a media data packet d. The FEC packets are FEC packet f1, FEC packet f2, and FEC packet f3, respectively. The FEC data packet f1 is obtained by performing an exclusive OR operation on the media data packet a, the media data packet b, and the media data packet c according to the data bits. The FEC data packet f2 is obtained by performing an exclusive OR operation on the media data packet a, the media data packet c, and the media data packet d according to the data bits. The FEC data packet f3 is obtained by performing an exclusive OR operation on the media data packet a, the media data packet b, and the media data packet d according to the data bits. If one media packet is lost in the 7 packets of one packet output, the probability of recovering the packet is 100%. If two media packets are lost in the 7 packets of one packet output, the probability of recovering the packet is 100%. If three media packets are lost in the 7 packets of one packet output, the probability of recovering the packet is 80%. If 4 media packets are lost in 7 packets of one packet output, the probability of recovering the packet is 0. It should be noted that different combinations of the number of media data packets M and the number of FEC packets N can obtain different packet loss recovery rates. Alternatively, different media packet number M, FEC packet number N, and association matrix combination may result in different packet loss recovery rates.

The packet loss recovery rate of the FEC encoding parameter corresponding to the first network quality level is lower than the packet loss recovery rate of the FEC encoding parameter corresponding to the second network quality level. The network quality characterized by the first network quality level is higher, and the packet loss rate is lower than the second network quality level. That is to say, the number of media data packets lost in the data transmission under the first network quality level is small. Therefore, considering the bandwidth occupied by transmitting the FEC packet, the FEC encoding may be set to enable the FEC encoding parameter corresponding to the first network quality level. The packet loss recovery rate is lower than the FEC code corresponding to the second network quality level. Thereby achieving a balance between bandwidth utilization and packet loss recovery rate. For example, the FEC encoding parameters include the number of media packets and the number of FEC packets. The packet loss recovery rate can be adjusted by adjusting the number of media packets and the number of FEC packets. The packet loss recovery rate is the probability of recovering lost media packets using FEC packets. For example, if the number of media packets is constant, increasing the number of FEC packets can increase the packet loss recovery rate.

In another example, the network performance parameters can include network quality parameters and network congestion parameters. The network performance deterioration condition may correspondingly include a network quality deterioration condition and a network patency condition. The network patency condition is a condition for judging whether the network between the service server and the user terminal is unobstructed. On the other hand, the network patency condition is a condition for judging whether or not the network between the service server and the user terminal is congested. For example, network congestion parameters include air interface throughput and the number of PHY errors. The network patency condition is that the air interface throughput is greater than or equal to the throughput congestion threshold, and the number of PHY errors is less than or equal to the number of security errors. If the air interface throughput is greater than or equal to the throughput congestion threshold and the number of PHY errors is less than or equal to the number of security errors, it is determined that the network congestion parameter satisfies the network patency condition. The network congestion parameters satisfy the network patency conditions, indicating that the network is unobstructed and no congestion occurs. The network congestion parameter does not meet the network patency condition indicating that the network is congested. If the network quality parameter satisfies the network quality deterioration condition, and the network congestion parameter satisfies the network patency condition, it indicates that the quality of the network between the service server and the user terminal is poor, but the network between the service server and the user terminal has bandwidth redundancy capability. FEC coding. The network access device can perform FEC encoding, and can also control the user terminal to enable the FEC receiving function. If the network quality parameter does not meet the network quality deterioration condition, or the network congestion parameter does not satisfy the network patency condition, the network access device refuses to control the user terminal to enable the FEC reception function.

For example, the network access device may also obtain a network congestion level based on network congestion parameters. The network congestion level includes a first network congestion level and a second network congestion level. The degree of network congestion characterized by the first network congestion level is higher than the degree of network congestion characterized by the second network congestion level. It should be noted that the first network congestion level and the second network congestion level are two relative levels. For example, if the network congestion severity is ranked from high to low, the network congestion level B1, the network congestion level B2, and the network congestion level B3 are obtained. For the network congestion level B1 and the network congestion level B2, the network congestion level B1 is the first network congestion level, and the network congestion level B2 is the second network congestion level. For the network congestion level B2 and the network congestion level B3, the network congestion level B2 is the first network congestion level, and the network congestion level B3 is the second network congestion level. For the network congestion level B1 and the network congestion level B3, the network congestion level B1 is the first network congestion level, and the network congestion level B3 is the second network congestion level.

The network access device sets the FEC encoding parameters according to the network congestion level. The FEC coding parameters are used by the network access device for FEC coding. The packet loss recovery rate of the FEC encoding parameter corresponding to the first network congestion level may be lower than the packet loss recovery rate of the FEC encoding parameter corresponding to the second network congestion level. The network congestion level characterized by the first network congestion level is relatively high. Under the condition of high congestion, the bandwidth is tight and there is no bandwidth redundancy capability. In order to alleviate the bandwidth pressure, the FEC encoding parameters are set such that the network congestion level characterized by the first network congestion level is higher than the network congestion level characterized by the second network congestion level. Thereby achieving a balance between bandwidth utilization and packet loss recovery rate. For example, the FEC encoding parameters include the number of media packets and the number of FEC packets. By reducing the number of transmitted media packets and the number of FEC packets, the amount of occupied bandwidth can be reduced and the bandwidth pressure can be reduced.

It should be noted that the network access device may also jointly set the FEC coding parameters in combination with the network quality level and the network congestion level. For the setting of the network quality level and the FEC encoding parameter, refer to the above description, and details are not described herein again.

In a data transmission method in the embodiment of the present application, the service server and the user terminal transmit data through the WiFi, and the network access device can intercept the channel parameter information sent by the service server, and detect whether the channel parameter information indicates that the user terminal starts the FEC. Receive function. If it is determined that the channel parameter information does not indicate that the user terminal starts the FEC receiving function, the network access device acquires the network performance parameter, and determines whether to control the user terminal to open the FEC receiving function according to the network performance parameter. Ensure that the user terminal can enable the FEC receiving function in the case of poor network performance in the WiFi environment, and recover the lost media data packet between the service server and the user terminal by using the FEC packet received after the FEC receiving function is enabled. Avoid losing image frames, which improves the service quality of IPTV.

FIG. 3 is a schematic structural diagram of a data transmission apparatus 300 according to an embodiment of the present application. As shown in FIG. 3, the data transmission device includes an information intercepting module 301, a parameter obtaining module 302, a detecting module 303, and a control module 304.

The information intercepting module 301 is configured to intercept the channel parameter information sent by the service server to the user terminal, and detect whether the channel parameter information indicates that the user terminal turns on the forward error correction FEC receiving function.

The parameter obtaining module 302 is configured to acquire network performance parameters of data communication between the service server and the user terminal when the channel parameter information does not indicate that the user terminal starts the FEC receiving function.

The detecting module 303 is configured to detect whether the network performance parameter satisfies the network performance deterioration condition.

The control module 304 is configured to control the user terminal to enable the FEC receiving function when the network performance parameter satisfies the network performance deterioration condition.

A data transmission device 300 in the embodiment of the present application may intercept the channel parameter information sent by the service server, and detect whether the channel parameter information indicates that the user terminal starts the FEC receiving function. If it is determined that the channel parameter information does not indicate that the user terminal turns on the FEC receiving function, the data transmission device acquires the network performance parameter, and determines whether to control the user terminal to open the FEC receiving function according to the network performance parameter. Ensure that the user terminal can enable the FEC receiving function in the case of poor network performance in the WiFi environment, and recover the lost media data packet between the service server and the user terminal by using the FEC packet received after the FEC receiving function is enabled. Avoid losing image frames, which improves the service quality of IPTV.

FIG. 4 is a schematic structural diagram of a data transmission device 300 according to another embodiment of the present application. 4 is different from FIG. 3 in that the data transmission device 300 in FIG. 4 may further include an encoding module 305.

The encoding module 305 is configured to perform FEC encoding.

In one example, the channel parameter information includes an FEC enabled port identification.

The control module is specifically configured to: add a valid port identifier to the channel parameter information, where the valid port identifier is a port identifier of the port in the user terminal that supports the FEC receiving function, and send the channel parameter information of the valid port identifier to the user terminal.

Alternatively, the control module is specifically configured to: modify the FEC-enabled port identifier of the channel parameter information that does not support the FEC receiving function, and modify the port identifier of the port that supports the FEC receiving function in the user terminal; and include the modified FEC. The channel parameter information that can be identified by the port is sent to the user terminal.

In one example, the network performance parameter includes a network quality parameter, and the network performance degradation condition includes a network quality degradation condition.

In another example, the network performance parameter includes a network quality parameter and a network congestion parameter, and the network performance deterioration condition includes a network quality deterioration condition and a network patency condition. The control module 304 is specifically configured to: when the network quality parameter meets the network quality deterioration condition, and the network congestion parameter satisfies the network unreachable condition, the network access device controls the user terminal to enable the FEC receiving function.

Further, the control module 304 is further configured to: obtain a network quality level based on the network quality parameter, where the network quality level includes a first network quality level and a second network quality level, where the network quality represented by the first network quality level is higher than the second network The quality of the network characterized by the quality level; according to the network quality level, the FEC encoding parameter is set, and the FEC encoding parameter is used for FEC encoding, and the packet loss recovery rate of the FEC encoding parameter corresponding to the first network quality level is lower than the second network quality level. Packet loss recovery rate of FEC coding parameters.

Further, the control module is further configured to: obtain a network congestion level based on the network congestion parameter, where the network congestion level includes a first network congestion level and a second network congestion level, where the network congestion level represented by the first network congestion level is higher than the second network The degree of network congestion characterized by the congestion level; the FEC encoding parameter is set according to the network congestion level, and the FEC encoding parameter is used for FEC encoding, and the packet loss recovery rate of the FEC encoding parameter corresponding to the first network congestion level is lower than the second network congestion level. Packet loss recovery rate of FEC encoding parameters.

For example, the above FEC encoding parameters may include the number of media packets and the number of FEC packets.

The data transmission method and apparatus according to embodiments of the present application described in conjunction with FIGS. 1 through 4 may be implemented by the network access device 400. FIG. 5 is a schematic structural diagram of hardware of a network access device 400 according to an embodiment of the present application.

Network access device 400 includes a memory 401, a processor 402, and a computer program stored on memory 401 and executable on processor 402.

In one example, the processor 402 described above can include a central processing unit (CPU), or an specific integrated circuit (ASIC), or can be configured to implement one or more integrated circuits of embodiments of the present application.

Memory 401 can include mass storage for data or instructions. By way of example and not limitation, the memory 401 may comprise a HDD, a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape or a universal serial bus (USB) drive, or a combination of two or more of these. Memory 401 may include removable or non-removable (or fixed) media, where appropriate. Memory 401 may be internal or external to network access device 400, where appropriate. In a particular embodiment, memory 401 is a non-volatile solid state memory. In a particular embodiment, memory 401 includes a read only memory (ROM). Where appropriate, the ROM may be a mask programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM) or flash memory or A combination of two or more of these.

The processor 402 runs a program corresponding to the executable program code by reading the executable program code stored in the memory 401 for executing the data query method in the various embodiments described above.

In one example, network access device 400 can also include a communication interface 403 and a bus 404. As shown in FIG. 5, the memory 401, the processor 402, and the communication interface 403 are connected by the bus 404 and complete communication with each other.

The communication interface 403 is mainly used to implement communication between modules, devices, units and/or devices in the embodiments of the present application. Communication interface 403 is also accessible to input devices and/or output devices.

Bus 404 includes hardware, software, or both, coupling components of network access device 400 to each other. By way of example and not limitation, bus 404 may include an accelerated graphics port (AGP) or other graphics bus, an enhanced industry standard architecture (EISA) bus, a front side bus (FSB), a super transfer (HT) interconnect, an industry standard architecture (ISA) Bus, Infinite Bandwidth Interconnect, Low Pin Count (LPC) Bus, Memory Bus, Micro Channel Architecture (MCA) Bus, Peripheral Component Interconnect (PCI) Bus, PCI-Express (PCI-X) Bus, Serial Advanced Technical Attachment (SATA) bus, Video Electronics Standards Association Local (VLB) bus or other suitable bus or a combination of two or more of these. Bus 404 may include one or more buses, where appropriate. Although a particular bus is described and illustrated in this application, the present application contemplates any suitable bus or interconnect.

An embodiment of the present application further provides a storage medium on which a program is stored, and when the program is executed by the processor, the data transmission method in each of the foregoing embodiments may be implemented.

The various parts of the specification are described in a progressive manner, and the same or similar parts between the various embodiments may be referred to each other, and each embodiment focuses on differences from other embodiments. In particular, for the device embodiment, the device embodiment, and the storage medium embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

The above is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and should cover Within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

A data transmission method, comprising:

The network access device intercepts the channel parameter information sent by the service server to the user terminal, and detects whether the channel parameter information indicates that the user terminal starts the forward error correction FEC receiving function;

If the channel parameter information does not indicate that the user terminal turns on the FEC receiving function, the network access device acquires network performance parameters of data communication between the service server and the user terminal;

The network access device detects whether the network performance parameter satisfies a network performance deterioration condition;

And if the network performance parameter satisfies a network performance deterioration condition, the network access device controls the user terminal to enable the FEC receiving function.
The method according to claim 1, wherein the channel parameter information comprises an FEC enabled port identifier;

The network access device controls the user terminal to enable the FEC receiving function, including:

The network access device adds a valid port identifier to the channel parameter information, where the valid port identifier is a port identifier of a port in the user terminal that supports the FEC receiving function, and the valid port identifier is added. The channel parameter information is sent to the user terminal;

or,

The network access device modifies the FEC-enabled port identifier of the channel parameter information that does not support the FEC receiving function, and modifies the port identifier of the port that supports the FEC receiving function in the user terminal; The channel parameter information including the modified FEC enabled port identifier is sent to the user terminal.
The method according to claim 1 or 2, wherein the network performance parameter comprises a network quality parameter, and the network performance deterioration condition comprises a network quality deterioration condition.
The method according to claim 1 or 2, wherein the network performance parameter comprises a network quality parameter and a network congestion parameter, and the network performance deterioration condition comprises a network quality deterioration condition and a network patency condition;

If the network performance parameter meets the network performance deterioration condition, the network access device controls the user terminal to enable the FEC receiving function, including:

And if the network quality parameter satisfies the network quality deterioration condition, and the network congestion parameter satisfies the network patency condition, the network access device controls the user terminal to enable the FEC receiving function.
The method according to claim 3 or 4, further comprising:

The network access device obtains a network quality level based on the network quality parameter, where the network quality level includes a first network quality level and a second network quality level, where the network quality represented by the first network quality level is higher than Describe the network quality characterized by the second network quality level;

The network access device sets an FEC encoding parameter according to the network quality level, where the FEC encoding parameter is used by the network access device to perform FEC encoding, and the FEC encoding parameter corresponding to the first network quality level The packet loss recovery rate is lower than the packet loss recovery rate of the FEC encoding parameter corresponding to the second network quality level.
The method according to claim 4 or 5, further comprising:

The network access device obtains a network congestion level based on a network congestion level, where the network congestion level includes a first network congestion level and a second network congestion level, where the first network congestion level represents a network congestion level higher than the The degree of network congestion characterized by the second network congestion level;

The network access device sets an FEC encoding parameter according to the network congestion level, where the FEC encoding parameter is used by the network access device to perform FEC encoding, and the FEC encoding parameter corresponding to the first network congestion level is The packet loss recovery rate is lower than the packet loss recovery rate of the FEC encoding parameter corresponding to the second network congestion level.
The method according to claim 5 or 6, wherein the FEC encoding parameters comprise a number of media packets and a number of FEC packets.
The method according to any one of claims 1 to 7, further comprising:

The network access device performs FEC encoding.
A data transmission device, comprising:

The information intercepting module is configured to intercept the channel parameter information sent by the service server to the user terminal, and detect whether the channel parameter information indicates that the user terminal turns on the forward error correction FEC receiving function;

a parameter obtaining module, configured to: when the channel parameter information does not indicate that the user terminal starts the FEC receiving function, acquire a network performance parameter that performs data communication between the service server and the user terminal;

a detecting module, configured to detect whether the network performance parameter meets a network performance deterioration condition;

And a control module, configured to control the user terminal to enable the FEC receiving function when the network performance parameter satisfies a network performance deterioration condition.
The apparatus according to claim 9, wherein the channel parameter information comprises an FEC enabled port identifier;

The control module is specifically configured to: add a valid port identifier to the channel parameter information, where the valid port identifier is a port identifier of a port in the user terminal that supports the FEC receiving function; and the effective Transmitting, by the port identifier, the channel parameter information to the user terminal;

or,

The control module is specifically configured to: modify, by the channel parameter information, an FEC-enabled port identifier that does not support the FEC receiving function, and modify the port identifier of the port that supports the FEC receiving function in the user terminal; And transmitting the channel parameter information including the modified FEC enabled port identifier to the user terminal.
The apparatus according to claim 9 or 10, wherein the network performance parameter comprises a network quality parameter, and the network performance deterioration condition comprises a network quality deterioration condition.
The apparatus according to claim 9 or 10, wherein the network performance parameter comprises a network quality parameter and a network congestion parameter, and the network performance deterioration condition comprises a network quality deterioration condition and a network patency condition;

The control module is specifically configured to: when the network quality parameter meets a network quality deterioration condition, and the network congestion parameter satisfies the network patency condition, the network access device controls the user terminal to enable the FEC receiving function .
The device according to claim 11 or 12, wherein the control module is further configured to:

And obtaining, according to the network quality parameter, a network quality level, where the network quality level includes a first network quality level and a second network quality level, where the network quality represented by the first network quality level is higher than the second network quality level Characterized network quality;

Determining, according to the network quality level, an FEC encoding parameter, where the FEC encoding parameter is used for performing FEC encoding, where a packet loss recovery rate of the FEC encoding parameter corresponding to the first network quality level is lower than the second network quality The packet loss recovery rate of the FEC encoding parameter corresponding to the level.
The device according to claim 12 or 13, wherein the control module is further configured to:

Obtaining a network congestion level based on a network congestion level, where the network congestion level includes a first network congestion level and a second network congestion level, where the first network congestion level represents a network congestion level higher than the second network congestion level representation Degree of network congestion;

Determining, according to the network congestion level, an FEC encoding parameter, where the FEC encoding parameter is used for performing FEC encoding, where a packet loss recovery rate of the FEC encoding parameter corresponding to the first network congestion level is lower than the second network congestion The packet loss recovery rate of the FEC encoding parameter corresponding to the level.
The apparatus according to claim 13 or 14, wherein said FEC encoding parameters comprise a number of media packets and a number of FEC packets.
The device according to any one of claims 9 to 15, further comprising:

Encoding module for FEC encoding.
A network access device, comprising: a memory, a processor, and a program stored on the memory and operable on the processor, the processor executing the program as claimed in claim 1 The data transmission method of any one of 8.
A storage medium characterized by storing a program thereon, the program being executed by a processor to implement the data transmission method according to any one of claims 1 to 8.