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Data transmission method and data transmission device

A data transmission method and data transmission technology, which are applied in the field of data transmission methods and devices, can solve problems such as inability to better provide streaming media video transmission services, lack of real-time detection and evaluation, and inability to schedule multi-path data transmission, etc., to achieve improved The effect of transmission rate and quality, reducing network load, and reducing data retransmission

Active Publication Date: 2015-04-08
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the heterogeneous wireless network environment, there is still a lack of a solution for real-time detection and evaluation of path quality, and it is impossible to intelligently allocate and schedule multi-path data transmission, and it is also impossible to better provide streaming video transmission services

Method used

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  • Data transmission method and data transmission device
  • Data transmission method and data transmission device
  • Data transmission method and data transmission device

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0049] Such as figure 1As shown, it is a flowchart of the principle of the data transmission method provided by Embodiment 1 of the present invention, wherein,

[0050] Step 10, divide the data transmission process on each path into multiple non-overlapping cycles, record the time when data packets enter and leave the sending buffer in each cycle, and calculate the time that data packets occupy the buffer.

[0051] First, it is necessary to divide the entire sending process into many non-overlapping cycles according to the data sending situation, and record the occupied time of multiple data packets entering and leaving the sending buffer in each cycle. Then, the designed path quality evaluation model can be used to measure and predict the transmission capacity of each path, and the state of the path can be divided into active state and inactive state according to the path quality. Here, in fact, each path needs to be divided into multiple non-overlapping periods according to...

Embodiment 2

[0118] Such as image 3 As shown, the embodiment of the present invention provides a data transmission device, including a period allocation unit 100, a transmission time recording unit 200, a path quality evaluation unit 300, and a path selection unit 400, specifically as follows:

[0119] A cycle allocation unit 100, configured to divide the data transmission process on each path into multiple non-overlapping cycles;

[0120] The transmission time recording unit 200 is used to record the time when the data packet enters and leaves the sending buffer in each cycle, and calculates the time when the data packet occupies the buffer;

[0121] The path quality evaluation unit 300 is used to calculate the path quality in real time according to the time and cache size occupied by the data packet;

[0122] The path selection unit 400 is configured to periodically select a path with better path quality as a path for data transmission.

[0123] The device further includes a packet lo...

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Abstract

The invention discloses a data transmission method and relates to the field of data transmission of communication technique. The method comprises a data transmission process of each path is divided into a plurality of non-overlapped periods to record time when data packets enter and leave a sending buffer memory in each period to calculate time when the data packets occupy the buffer memory; path quality is calculate in real time according to time when the data packets occupy the buffer memory and the size the data packets occupy the buffer memory; and paths with good quality are chosen periodically to be used as data transmission paths. According to estimation results and by means of data distribution scheduling algorithm, multipath data transmission is intelligently distributed and scheduled, sequential arrival of data packets is guaranteed as possible, and new retransmission mechanisms are introduced to distinguish and process data packet loss caused by different factors. The data transmission method can improve data transmission speed and quality, reduces data retransmission, reduces network load and furthermore improves experience effect of users of streaming media.

Description

technical field [0001] The invention relates to the field of communication technology data transmission, in particular to a data transmission method and device. Background technique [0002] In recent years, wireless communication technology has developed rapidly, and mobile terminals have become more and more intelligent. Most of today's mobile terminals are equipped with multiple network interfaces, so that users can obtain ubiquitous network access to enjoy various network applications. However, in a heterogeneous network environment, some solutions to ensure the quality of service are needed to obtain a smooth service experience. Stream Transmission Control Protocol (SCTP) has the characteristics of multihoming (Multihoming) and dynamic binding (mSCTP). It is a protocol that is expected to provide efficient data transmission and seamless continuous services in a heterogeneous network environment. [0003] Concurrent Multiple Transport (CMT) utilizes the multi-home feat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/08H04W40/12H04L1/16H04L29/06
Inventor 许长桥关建峰张宏科刘天骄贾世杰黎卓峰
Owner BEIJING UNIV OF POSTS & TELECOMM