1 research outputs found
Joint Pushing and Caching with a Finite Receiver Buffer: Optimal Policies and Throughput Analysis
Pushing and caching hold the promise of significantly increasing the
throughput of content-centric wireless networks. However, the throughput gain
of these techniques is limited by the buffer size of the receiver. To overcome
this, this paper presents a Joint Pushing and Caching (JPC) method that jointly
determines the contents to be pushed to, and to be removed from, the receiver
buffer in each timeslot. An offline and two online JPC policies are proposed
respectively based on noncausal, statistical, and causal content Request Delay
Information (RDI), which predicts a user's request time for certain content. It
is shown that the effective throughput of JPC is increased with the receiver
buffer size and the pushing channel capacity. Furthermore, the causal feedback
of user requests is found to greatly enhance the performance of online JPC
without inducing much signalling overhead in practice.Comment: 6 pages, 4 figure