A Method for Accessing Spatial Spectrum Holes for Relay Based Cognitive Cellular Networks

Author

Mankar, Praful D. ; Das, Goutam ; Pathak, S.S. ; Rajakumar, R.V.

Author_Institution

Dept. of Electron. & Electr. Commun. Eng., Indian Inst. of Technol., Kharagpur, Kharagpur, India

Volume

4

Issue

3

fYear

2015

fDate

6/1/2015 12:00:00 AM

Firstpage

245

Lastpage

248

Abstract

In cellular networks, usually users at the cell edge experience degraded Quality-of-Service (QoS) due to poor signal strength and severe interference. This paper attempts to resolve this issue by applying cognitive radio features to a relay based cellular network. Spatial holes in the spectrum, licensed to another (primary) network, are accessed for relaying purpose such that the outage probability of the cumulative interference to primary users is below limit. This relaxes the requirement for bandwidth reservation needed for conventional relaying. Moreover, interference from adjacent cells in relay to user link is eliminated which leads to extended coverage for such cognitive relays. The method is tested in a simulated TD-LTE sub-urban scenario and found to outperform the conventional relaying.

Keywords

Long Term Evolution; cellular radio; interference; probability; relay networks (telecommunication); QoS; adjacent cells; cell edge experience; cognitive radio features; cumulative interference; outage probability; quality-of-service; relay based cognitive cellular networks; simulated TD-LTE sub-urban scenario; spatial spectrum holes; Bandwidth; Interference; Quality of service; Relays; Resource management; Throughput; Uplink; Cognitive Relay; Cognitive relay; Optimal Power; User; etc; optimal power; outage probability; primary sub-band; primary user; secondary user;

fLanguage

English

Journal_Title

Wireless Communications Letters, IEEE

Publisher

ieee

ISSN

2162-2337

Type

jour

DOI

10.1109/LWC.2015.2404351

Filename

7042743