科研之友
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摘要
In this mobile-centric era, users expect ubiquitous access at low cost to an ever increasing range of applications requiring increasingly high data connection speeds. Wireless Mesh Network (WMN) technology provides support for data access over a relatively large area at a modest cost while also being easy and flexible to deploy. Unfortunately, WMN performance is sensitive to load, and applications such as video on demand are likely to stress the network. In response to this, approaches to balance traffic load, such as peer-to-peer solutions are very promising. However, in order to work efficiently, these solutions require not only availability awareness, but also knowledge about location of peers and services. This paper presents a wireless coordinate-based location-aware overlay mechanism for locating and retrieving requested video segments from the nearest peers in order to improve retrieved video quality in WMN. In comparison to the original overlay schemes, our mechanism has significant benefits in both overlay communication efficiency and data retrieval efficiency. Simulation results in both regular and random video segment placement scenarios show how the proposed peer-to-peer video delivery solution for WMN outperforms existing state-of-the-art solutions in terms of video quality and packet loss with different background traffic loads and replication rates.
- 出版日期2015-7
