TY - GEN
T1 - Contention-sensing and dynamic spectrum co-use in secondary user Cognitive Radio societies
AU - Wisniewska, Anna
AU - Khan, Bilal
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/9/22
Y1 - 2014/9/22
N2 - Emerging standards in Cognitive Radio seek to alleviate the problem of spectrum scarcity by leveraging spectrum under-utilization through dynamic spectrum access (DSA). Unlicensed users ('secondary') may opportunistically make use of channels during times when the licensed ('primary') user is absent. The 'open access' paradigm proposed by FCC mandates the study of primary-secondary dynamics, as well as secondary-secondary dynamics to better understand the implications of uncoordinated competition for limited number of resources between secondary users. In this paper, we consider long term etiquette between secondary users engaged in spectrum co-use. In order to maximize throughput, by avoiding over-crowded channels, we propose a novel approach wherein secondary users have the ability to 'sense' very approximate contention levels at a single spectrum band at each point in time. System performance under the contention-sensing paradigm is compared to two schemes: first, a previously defined non-cooperative game model; second, a new model which allows for spectrum foraging, but without providing secondary users the ability to sense contention in a band. Through simulation experiments, we show that the contention-sensing paradigm results in significantly better co-use of spectrum resources. Additionally, our experiments demonstrate that the proposed contention-sensing paradigm continues to outperform when the ratio of secondary users to spectrum bands is increased. Thus, the new schemes described here may be of critical importance in a future where we expect the number of secondary users to grow exponentially and thus require a scalable mechanism for opportunistic scavenging of unused spectrum.
AB - Emerging standards in Cognitive Radio seek to alleviate the problem of spectrum scarcity by leveraging spectrum under-utilization through dynamic spectrum access (DSA). Unlicensed users ('secondary') may opportunistically make use of channels during times when the licensed ('primary') user is absent. The 'open access' paradigm proposed by FCC mandates the study of primary-secondary dynamics, as well as secondary-secondary dynamics to better understand the implications of uncoordinated competition for limited number of resources between secondary users. In this paper, we consider long term etiquette between secondary users engaged in spectrum co-use. In order to maximize throughput, by avoiding over-crowded channels, we propose a novel approach wherein secondary users have the ability to 'sense' very approximate contention levels at a single spectrum band at each point in time. System performance under the contention-sensing paradigm is compared to two schemes: first, a previously defined non-cooperative game model; second, a new model which allows for spectrum foraging, but without providing secondary users the ability to sense contention in a band. Through simulation experiments, we show that the contention-sensing paradigm results in significantly better co-use of spectrum resources. Additionally, our experiments demonstrate that the proposed contention-sensing paradigm continues to outperform when the ratio of secondary users to spectrum bands is increased. Thus, the new schemes described here may be of critical importance in a future where we expect the number of secondary users to grow exponentially and thus require a scalable mechanism for opportunistic scavenging of unused spectrum.
KW - Cognitive radio networks
KW - contention-sensing
KW - dynamic spectrum access
KW - self-coexsitence
UR - http://www.scopus.com/inward/record.url?scp=84908618840&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84908618840&partnerID=8YFLogxK
U2 - 10.1109/IWCMC.2014.6906349
DO - 10.1109/IWCMC.2014.6906349
M3 - Conference contribution
AN - SCOPUS:84908618840
T3 - IWCMC 2014 - 10th International Wireless Communications and Mobile Computing Conference
SP - 157
EP - 162
BT - IWCMC 2014 - 10th International Wireless Communications and Mobile Computing Conference
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 10th International Wireless Communications and Mobile Computing Conference, IWCMC 2014
Y2 - 4 August 2014 through 8 August 2014
ER -