Dynamic code rate allocation method and packet domain stream media server

Abstract

The inventive embodiment discloses a dynamic code rate allocation method, comprising the steps that: the roundtrip time of a sender report packet is acquired; whether the roundtrip time meets the preset conditions is judged; code rate switch is carried out, when the roundtrip time meets the conditions; and the switched media data is sent. The inventive embodiment also discloses a dynamic code rate allocation method, comprising the steps that: the code rate is judged whether to be adjusted, when the bandwidth of a user device changes; and code rate switch is carried out when the current transmission frame is complete. Furthermore, the inventive embodiment discloses corresponding packet domain flow media server and wireless network controller. By using the invention, mobile flow media is played more fluently when switched.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a Dynamic Bandwidth Allocation (DBA, Dynamic Bandwidth Allocation) method and a packet domain streaming media server. Background technique [0002] Streaming media is a technology that compresses video and audio information and provides them to users in the form of media streams. The streaming media service in the field of mobile communication is called mobile streaming media. The common mobile streaming media The end-to-end networking structure is shown in Figure 1, including: a user equipment (UE, User Equipment) 101 located in the packet domain, a radio network controller (RNC, Radio Network Controller) 102, a gateway general packet radio service support node (GGSN, Gateway GPRSSupport Node) 103; a packet domain streaming server (PSS, Packet-switched Streaming Server) 104 and a portal (Portal) 105 located in the Internet Protocol (IP, Internet Protocol) network. ...

AI Technical Summary

Problems solved by technology

[0007] The packet loss rate is used as the basis for adjusting the bit rate, and the switch is performed only when the packet loss has already occurred. The switch is relatively lagging, and the playback quality is often poor and lasts for a period of time before being adjusted.

Especially for the situation where the code rate needs to be adjusted downward, that is, the code rate is cut down, the code rate is reduced only when the packet loss rate reaches a certain level, which means that the bandwidth on the UE side is already lower than the code rate at this time and packet loss occurs for a period of time , the media server realizes that the code rate has been cut, and the feeling for the user is that the picture will return to normal after a period of mosaic, and the experience brought to the user is very poor.

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