Outage Probability of a Multi-Relay Cognitive Network with an Uncertain Number of Forwarding Relays

Authors

Y. Hu, J. Gross, A. Schmeink,

Abstract

        In this paper, we focus on a Cognitive Relay Network(CRN) where only the information of the average channel gains is available at the secondary source. A distributed multiple relay selection scheme is proposed for the secondary transmission. Since the secondary source does not fully control the selection but lets each secondary relay decide by itself, it doesn’t know which and how many relays will participate in the forwarding. This brings a serious uncertainty in the number of forwarding relays. We analyze this uncertainty and derive the closed-form expression of the outage probability of the secondary transmis- sion under the uncertainty. Finally, we evaluate the proposed relay selection scheme by means of simulation. The simulation shows the appropriateness of our analytical model. In addition, although having lower interference constraint at each relay, the performances of the proposed multi-relay CRN scheme are shown
to be strictly superior to the single relay CRN. Moreover, the simulation results suggest that it is necessary to spend the general overhead for secondary networks on knowing the exact QoS requirement of the primary user (i.e. the interference violation
probability) to apply our proposed relay selection scheme with the statistical total interference constraint.

BibTEX Reference Entry 

@inproceedings{HuGrSc14,
	author = {Yulin Hu and James Gross and Anke Schmeink},
	title = "Outage Probability of a Multi-Relay Cognitive Network with an Uncertain Number of Forwarding Relays",
	pages = "1-5",
	booktitle = "International Symposium on Wireless Communication Systems (ISWCS)",
	address = {Barcelona, Spain},
	month = Aug,
	year = 2014,
	hsb = hsb999910355369 ,
	}

Downloads

 Download paper  Download bibtex-file

This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights there in are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.