A Selective Neighbor Caching Approach for Supporting Mobility in Publish/Subscribe Networks ?

We present a selective neighbor caching approach for sup- porting mobility in publish/subscribe networks. According to the ap- proach, a mobile's subscriptions are transmitted to a subset of brokers that are neighbors of the current broker that the mobile is connected to. Our key contribution is the denition of a target cost function and an intelligent procedure for selecting the subset of neighbors. The advan- tage of our proposal is that it reduces the buering costs, since not all neighbor brokers cache items, while still obtaining the gains of proactive caching, by caching items in a subset of neighbor brokers that a mobile has a high probability to connect to.

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