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Routing agent-based media sensing automatic retransmission request (ARQ) control method and system

A control method and routing technology, applied in the direction of transmission system, digital transmission system, data exchange network, etc., can solve the problem that network video transmission cannot provide QoS guarantee, achieve high service quality guarantee, good video transmission service, and avoid congestion Effect

Inactive Publication Date: 2011-06-22
ZTE CORP
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Problems solved by technology

[0006] In view of this, the main purpose of the present invention is to provide a routing agent-based media-aware ARQ control method and system, which is used to solve the problem that the existing wired-wireless heterogeneous network ARQ control method cannot be well combined with H.264 / MPEG -4 The characteristics of video coding, the technical problem that network video transmission cannot provide the required QoS guarantee

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  • Routing agent-based media sensing automatic retransmission request (ARQ) control method and system
  • Routing agent-based media sensing automatic retransmission request (ARQ) control method and system

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail by citing the following embodiments and referring to the accompanying drawings.

[0035] The present invention combines the characteristic of H.264 / MPEG4 video coding, proposes a kind of media-aware ARQ control method based on routing agent, mainly includes the improvement of two aspects: consider the improvement of implementation from the perspective of grouping priority and from the transmission of video stream The improvements implemented are considered in terms of latency constraints.

[0036] 1. Consider the implementation improvements from the perspective of ARQ packet priority

[0037] A standard MPEG-4 encoder produces three different types of frames: I frames, P frames, and B frames. The I frame only uses its own information for independent decoding, and can be used as a reference frame for decoding other fr...

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Abstract

The invention discloses a routing agent-based media sensing automatic retransmission request (ARQ) control method and a routing agent-based media sensing ARQ control system, which are used for solving the technical problem that the characteristics of H.264 / MPEG-4 video coding cannot be well combined and quality of service (QoS) assurance cannot be provided for network video transmission in the conventional ARQ control method for a wired-wireless heterogeneous network. In the method and the system, the characteristics of a video data packet are combined, the original ARQ advantages of a medium access control (MAC) layer are utilized, only the I frame of data is retransmitted, and unimportant video packets are preferentially discarded when a link is congested, thereby providing higher quality of service assurance; and simultaneously, a timeout early detection mechanism is introduced, and the video packets exceeding a video decoding delay threshold are discarded early to prevent invalid packet transmission from occupying valuable network resources and avoid the occurrence of congestion.

Description

technical field [0001] The present invention relates to a wireless network communication technology, in particular to a method and system for controlling a media-aware automatic repeat request (Automatic Repeat Request, ARQ) of a wired-wireless heterogeneous network based on a routing agent. Background technique [0002] The rapid development and application of wireless broadband networks and the Internet have provided a strong market force for the development of network multimedia transmission technologies, and wireless streaming services based on wired-wireless heterogeneous networks are becoming increasingly popular. Improving the quality of service (QoS) guarantee technology of streaming media from the end system is the most direct means, but it is not the most effective. At present, the research on network QoS guarantee mechanism has become one of the research hotspots, which provides a great opportunity for large-scale commercial application of network video services. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/16H04L12/56
Inventor 林亚
Owner ZTE CORP
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