Adaptive Bandwidth Allocation Scheme for Cognitive Radios

In recent past, cognitive radio has come out to as a promising solution to the spectrum scarcity problem. It tends to increase the spectrum utilization by making use of underutilized frequencies with the help of dynamic spectrum allocation technique. In this paper, we present one such scheme for bandwidth allocation to cognitive radio. Our proposal helps the channel distributor to decide the quantity of bandwidth that can be allocated to an unlicensed user at any given time. Fuzzy rules are used to optimize the bandwidth allocation based on three antecedents as: arrival rate of both licensed and unlicensed users and the availability of unoccupied number of channels within the system. The scheme is independent of the service times for user’s requests and thus may be applicable to any service distribution type.

[1]  Qilian Liang,et al.  Opportunistic Spectrum Access Using Fuzzy Logic for Cognitive Radio Networks , 2008, 2008 Second International Conference on Communications and Electronics.

[2]  Joseph Mitola,et al.  Cognitive radio: making software radios more personal , 1999, IEEE Wirel. Commun..

[3]  Ana I. Pérez-Neira,et al.  Fuzzy-based Spectrum Handoff in Cognitive Radio Networks , 2008, 2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008).

[4]  C. Cordeiro,et al.  IEEE 802.22: the first worldwide wireless standard based on cognitive radios , 2005, First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, 2005. DySPAN 2005..

[5]  Michele Zorzi,et al.  Fuzzy Logic for Cross-layer Optimization in Cognitive Radio Networks , 2008, 2007 4th IEEE Consumer Communications and Networking Conference.

[6]  Joseph Mitola,et al.  Cognitive Radio An Integrated Agent Architecture for Software Defined Radio , 2000 .

[7]  Simon Haykin,et al.  Cognitive radio: brain-empowered wireless communications , 2005, IEEE Journal on Selected Areas in Communications.

[8]  Arun Khosla,et al.  An efficient spectrum mobility management strategy in cognitive radio networks , 2009, 2009 First UK-India International Workshop on Cognitive Wireless Systems (UKIWCWS).

[9]  Youyun Xu,et al.  A fuzzy collaborative spectrum sensing scheme in cognitive radio , 2007, 2007 International Symposium on Intelligent Signal Processing and Communication Systems.

[10]  Brian M. Sadler,et al.  A Survey of Dynamic Spectrum Access , 2007, IEEE Signal Processing Magazine.

[11]  Tao Chen,et al.  CogMesh: A Cluster-Based Cognitive Radio Network , 2007, 2007 2nd IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks.

[12]  Qilian Liang,et al.  An Efficient Power Control Scheme for Cognitive Radios , 2007, 2007 IEEE Wireless Communications and Networking Conference.