Abstract
In this paper, we propose innovative schemes for relay selection that jointly explore packet selection and relay selection for buffer-aided amplify and forward (AF) cooperative relaying networks. The first proposed scheme chooses the most suitable channel based on link quality from all active channels, i.e., channels with neither empty nor full corresponding buffers. In the second proposed scheme, the most suitable channel is chosen based on buffer status. When the source-relay channel is determined, the corresponding relay collects data in the buffer. Likewise, when the relay-destination channel is picked, the most suitable packet is dispatched from the buffer. The most suitable packet is one that provides the highest end-to-end equivalent signal-to-noise ratio. We simulated the outage probability, average throughput and packet delay and analyzed the proposed protocol for both symmetric and asymmetric channel conditions. Comparison is made against the existing buffer-aided schemes. The results show that the proposed relay and packet selection systems help to reduce the outage probability, diversity gain and delay.
Highlights
Buffer-aided cooperative relaying is capable of reducing the channel mismatch problem in traditional cooperative relaying to enhance diversity gain and throughput
The outage is considered in joint packet and relay selection (JPARS)-buffer state-based (BSB) scheme when no packet is available that provides equivalent signal-to-noise ratio (SNR) higher than the threshold, which is similar to JPARS-SNR scheme
The evaluation for the symmetric and asymmetric channels are presented for the analysis of JPARS-SNR scheme, and the only symmetric case is presented for the analysis of JPARS-BSB scheme
Summary
Buffer-aided cooperative relaying is capable of reducing the channel mismatch problem in traditional cooperative relaying to enhance diversity gain and throughput. The most suitable C1 based on channel quality or buffer occupancy is picked for data collection at the relay per odd time slot. Another work for buffer-aided cooperative relaying using AF relaying is proposed in [17] It is designed for single relay node, and it focused on packet selection instead of relay selection to develop the better outage probability. To the best of our information, there is no such available literature that simultaneously explores both the relay selection and packet selection for buffer-aided cooperative relaying networks. The proposed JPARS-SNR scheme is simulated for both symmetric and asymmetric channel configurations and investigation for the outage probability, throughput and end-to-end packet delay are presented.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
