Data transmission rate control method, system and user equipment

Abstract

The invention discloses a data transmission rate control method, a data transmission rate control system and user equipment. The method comprises the steps of S1 receiving and storing a data packet sent to a local end by an external end; S2 respectively reading the data packets received in the local end within the preset time before and after the latest code rate adjustment, and recording the corresponding number of the read data packets; and S3 judging a current code rate adjustment state, and entering a code rate increasing / decreasing processing flow according to a first judgment result, wherein the process of increasing / decreasing the code rate comprises the step of updating the code rate adjustment state according to the read data packets and the corresponding number. According to theinvention, statistical information data transmitted between the external end and the local end are few; the current bandwidth can be accurately and rapidly calculated; the code rate is adjusted in time; and congestion control is well achieved.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a data transmission rate control method, system and user equipment. Background technique [0002] Network congestion is a common network transmission problem in IP-based packet switching networks. It has a serious impact on the quality of network transmission. Network congestion is one of the main reasons for network throughput reduction and network packet loss. These problems make it impossible for upper-layer applications to effectively use network bandwidth to obtain high-quality network transmission effects. Especially in the field of communication, problems such as packet loss, delay, and jitter caused by network congestion seriously affect the quality of communication. If these problems cannot be solved well, a communication product cannot be used normally in the real environment. [0003] Network congestion is a common phenomenon, especially in a wi...

AI Technical Summary

Problems solved by technology

[0012] 1. The occurrence of network congestion is a changing process. In this process, the real-time bandwidth of the network fluctuates randomly and irregularly, so it is very difficult to quickly and accurately calculate the real-time bandwidth of the network.

[0013] 2. The code rate adjustment of the video encoder is delayed and cannot take effect immediately. Generally, it takes a delay of 1 or 2 seconds to generate a code stream of a specific size

[0014] 3. The phenomenon of network congestion in different networks is different. Some data packets are lost, and with the increase of RTT, some RTTs do not change significantly, and only data packets are lost.

The subject of GCC algorithm based on delay estimation has no contention rate for bandwidth memory packet loss at this stage. The Salsify algorithm proposed by Stanford University is based on the delay between video frames to estimate the encoding speed of the entire encoder, but it It must be implemented on the basis of the encoder, which cannot meet the requirements of transmitting video to the server for distribution. If only segmented congestion control is required, re-decoding and re-encoding must be performed on the server, so it cannot meet the current real-time video field. application

The BBR algorithm released by Google can be used in TCP and UDP protocol modes, but the receiving end needs to return a receipt to the sending end when receiving each data packet, which greatly reduces the superiority of UDP transmission

In addition, the BBR algorithm has 4 states (STARTUP, DRAIN, PROBE_BW, PROBE_RTT), switching between each state, so the BBR algorithm cannot respond to network congestion in a timely manner

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