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Frame loss prediction based cellular network uplink video communication QoS (Quality of Service) optimization method

A technology of video communication and optimization method, which is applied in the field of communication, can solve the problems of difficult availability and huge cost investment, and achieve the effect of high image reconstruction quality gain

Inactive Publication Date: 2011-02-09
SHANGHAI JIAO TONG UNIV
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AI Technical Summary

Problems solved by technology

Considering that any change or investment in the existing base station will bring huge cost input, it is difficult to implement a real-time feedback solution by setting up a proxy server

Method used

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  • Frame loss prediction based cellular network uplink video communication QoS (Quality of Service) optimization method
  • Frame loss prediction based cellular network uplink video communication QoS (Quality of Service) optimization method
  • Frame loss prediction based cellular network uplink video communication QoS (Quality of Service) optimization method

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Embodiment Construction

[0022] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0023] In this example, in order to evaluate the frame loss prediction accuracy of the RF link layer agent (the ratio of the actual number of SDU frame loss to the predicted number of loss in a video sequence), the H.264 / AVC reference code JM10.2 is used and 3GPP / 3GPP2 Offline Simulator, a set of embodiment simulations were performed. In the test, the standard error code samples recommended by 3GPP / 3GPP2 are used to simulate the real 3G wireless channel, and its detailed parameters are shown in Table 1. In order not to lose generality, the retransmission times limit η=3 adopted by most mobile base stations is sele...

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Abstract

The invention relates to a frame loss prediction based cellular network uplink video communication QoS (Quality of Service) optimization method in the technical field of communication. In the invention, frame loss prediction and timeout frame loss based on ARQ (Automatic Repeat Request) retransmission number counting are realized through designing a link layer proxy at a sending terminal link layer on the basis of the own ARQ function of the link layer of a base station, and the frame loss information of the link layer is fed back to an application layer encoder; meanwhile, the receiving conditions of all frames are counted through designing an application layer proxy on the application layer of a receiving end, and correctly received information is fed back to a sending end encoder end to end; and the sending end encoder marks the transmitting state of each encoded image frame according to received cross layer feedback and end-to-end feedback, wherein a correctly transmitted mark is G, and a reference frame while encoding is limited in a frame of which the mark is G so as to promote the robustness to error codes while video reconstruction.

Description

technical field [0001] The invention relates to a method in the technical field of communication, in particular to a QoS optimization method for uplink video communication in a cellular network based on frame loss prediction. Background technique [0002] At present, most mobile base stations use a combination of FEC (Forward Error Correction, forward error correction) and ARQ (Auto Retransmission Request, automatic retransmission request) to provide quality of service (QoS) for data transmission on wireless channels. ensure. FEC is mainly used for bit-level error correction; uncorrectable errors are retransmitted through ARQ. Specific to the uplink cellular video communication system, when the base station encounters an uncorrectable transmission error, it will send a retransmission request ARQ to the mobile terminal, and the sending end will retransmit the current error link frame unit according to the received request. Obviously, retransmission will introduce additional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04W28/04
Inventor 张重阳马玲
Owner SHANGHAI JIAO TONG UNIV
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