Buffer-Aided Relaying with Adaptive Link Selection

Computer Science – Information Theory

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

IEEE Journal on Selected Areas in Communications; Special Issue on Theories and Methods for Advanced Wireless Relays

Scientific paper

In this paper, we consider a simple network consisting of a source, a half-duplex decode-and-forward relay, and a destination. We propose a new relaying protocol employing adaptive link selection, i.e., in any given time slot, based on the channel state information of the source-relay and the relay-destination link a decision is made whether the source or the relay transmits. In order to avoid data loss at the relay, adaptive link selection requires the relay to be equipped with a buffer such that data can be queued until the relay-destination link is selected for transmission. We study both delay constrained and delay unconstrained transmission. For the delay unconstrained case, we characterize the optimal link selection policy, derive the corresponding throughput, and develop an optimal power allocation scheme. For the delay constrained case, we propose to starve the buffer of the relay by choosing the decision threshold of the link selection policy smaller than the optimal one and derive a corresponding upper bound on the average delay. Furthermore, we propose a modified link selection protocol which avoids buffer overflow by limiting the queue size. Our analytical and numerical results show that buffer-aided relaying with adaptive link selection achieves significant throughput gains compared to conventional relaying protocols with and without buffers where the relay employs a fixed schedule for reception and transmission.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Buffer-Aided Relaying with Adaptive Link Selection does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Buffer-Aided Relaying with Adaptive Link Selection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Buffer-Aided Relaying with Adaptive Link Selection will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-78077

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.