Abstract

Layer streaming has received extensive attention due to the highly heterogeneous access to the Internet. In the three-tier networking architecture, proxies can improve the quality of service of clients. The system performance can further be improved via co-operation of the proxies. Here, user mobility is taken into consideration, i. e. , mobile clients can switch to a proxy dynamically. Proxy Handoff is defined to have applications executed smoothly when mobile clients move in the server-proxy-client architecture. First, proxy handoff employs application-layer anycast to select one of the candidate proxies as the next proxy based on 1) the network condition between the mobile client and each candidate proxy and 2) the load balance among the candidate proxies.

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