Recently, peer-to-peer approach has emerged as an effective solution for live streaming services. However, some channels may not provide good streaming services due to their less audience, and some peers may receive bad services owning to their relatively narrower bandwidth. To address these issues, we introduce a peer-to-peer inter-channel assisting scheme for live streaming services. In the scheme, the social network theory is employed to construct the inter-channel overlay network. The scope of cooperation is scaled from intra-channel to inter-channel through active assistance and passive assistance. Besides, the relationship in social network works as the incentive mechanism to stimulate the assisting behaviors among peers. Simulations demonstrate that our scheme can promote the cooperation effectively and consequently improve the streaming qualities significantly.
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