Title :
A bandwidth sharing approach to improve licensed spectrum utilization
Author :
Sankaranarayanan, S. ; Papadimitratos, P. ; Mishra, Anadi ; Hershey, S.
Author_Institution :
Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksbury, VA
Abstract :
The spectrum of deployed wireless cellular communication systems is found to be under-utilized, even though licensed spectrum is at a premium. To efficiently utilize the bandwidth left unused in a cellular system, which we denote as the primary system (PRI), we design a system with an ad hoc overlay network, which we denote as the secondary system (SEC). The basic design principle is that the SEC operates in a non-intrusive manner and does not interact with the PRI. We develop the AS-MAC, an ad hoc SEC medium access control protocol to enable the interoperation of the PRI-SEC system. We address a number of technical challenges pertinent to this networking environment, and evaluate AS-MAC. Our performance evaluation results show that, in a single-hop ASN, the AS-MAC transparently utilizes 75% of the bandwidth left unused by the PRI, while, in multi-hop ASNs, due to spatial reuse, the AS-MAC can utilize up to 180% of the idle PRI resources
Keywords :
access protocols; ad hoc networks; cellular radio; performance evaluation; radio spectrum management; AS-MAC protocol; PRI-SEC; ad hoc network; bandwidth sharing approach; licensed spectrum utilization; medium access control; overlay network; performance evaluation; primary-secondary system; wireless cellular communication system; Access protocols; Area measurement; Bandwidth; Cellular networks; Frequency; GSM; Media Access Protocol; Peer to peer computing; Spread spectrum communication; Wireless communication;
Conference_Titel :
New Frontiers in Dynamic Spectrum Access Networks, 2005. DySPAN 2005. 2005 First IEEE International Symposium on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-4244-0013-9
DOI :
10.1109/DYSPAN.2005.1542644