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A method and system for rate adaptive switch

An adaptive switching and code rate technology, applied in transmission systems, digital transmission systems, data switching networks, etc., can solve problems such as coexistence of wireless channel instability and wired link congestion, and achieve good interruption characteristics. Effect

Active Publication Date: 2018-12-11
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, the existing solutions usually only carry out code rate adaptive design for the unstable wireless channel, and rarely consider the coexistence of wireless channel instability and wired link congestion.

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  • A method and system for rate adaptive switch
  • A method and system for rate adaptive switch
  • A method and system for rate adaptive switch

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Embodiment Construction

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] At present, in the prior art, the code rate adaptation based on the bandwidth estimation, the code rate adaptation based on the terminal cache, and the code rate adaptation scheme combining the two can be generally used in the code rate adaptive switching. The three solutions are usually proposed for the unstable wireless channel. However, in practical applicatio...

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Abstract

The embodiment of the invention provides a code rate adaptive switching method, which comprises the following steps: identifying a current network state; if the identification result of the current network state is a first state, adopting a first rate switching strategy; if the identification result of the current network state is a second state, adopting a second rate switching strategy; whereinthe first rate handoff strategy is to select an appropriate rate according to an average throughput size of the network, and the second rate handoff strategy is to select an appropriate rate accordingto an instantaneous throughput size of the network. The code rate adaptive switching method provided by the embodiment of the invention is applicable to the transmission scene of the DASH video service in the mobile network by identifying the network state and selecting the corresponding code rate switching strategy according to the characteristics of the network state, and has good performance in the aspects of average code rate, interruption characteristic and the like.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of video service transmission, and in particular to a code rate adaptive switching method and system. Background technique [0002] With the development of mobile networks and the popularity of smart terminals, mobile video services have become the mainstream of mobile data services. DASH service is a new type of dynamic adaptive streaming service. Its main feature is user-centered. The terminal has the function of bit rate self-adaptation. It can dynamically select the best video version to download and play according to its own situation. To improve the quality of user experience. However, the available bandwidth of users in the mobile network is unstable: on the one hand, the wireless channel of the mobile network is subject to dynamic changes due to factors such as noise, fading, and interference; on the other hand, the DASH service is a data service. Wired links may be affected b...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/4363H04N21/442H04N21/647H04L12/24
CPCH04L41/0823H04L41/145H04N21/4363H04N21/44227H04N21/64769
Inventor 张志龙李晓曾敏寅刘丹谱尹长川
Owner BEIJING UNIV OF POSTS & TELECOMM
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