Dynamic TDMA slot reservation protocol for cognitive radio ad hoc networks
Conference Paper
Kamruzzaman, S. M. . 2010
Publication Online URL:
Conference Name:
13th IEEE International Conference on Computer and Information Technology (ICCIT-2010)
Conference Location:
Dhaka, Bangladesh
Conference Date:
Thursday, December 23, 2010
Sponsoring Organization:
IEEE
Publication Abstract:
In this paper, we propose a dynamic TDMA slot reservation (DTSR) protocol for cognitive radio ad hoc networks. Quality of Service (QoS) guarantee plays a critically important role in such networks. We consider the problem of providing QoS guarantee to users as well as to maintain the most efficient use of scarce bandwidth resources. A dynamic frame length expansion and shrinking scheme that controls the excessive increase of unassigned slots has been proposed. This method efficiently utilizes the channel bandwidth by assigning unused slots to new neighboring nodes and increasing the frame length when the number of slots in the frame is insufficient to support the neighboring nodes. It also shrinks the frame length in an effective way. Our proposed scheme, which provides both QoS guarantee and efficient resource utilization, be employed to optimize the channel spatial reuse and maximize the system throughput. Extensive simulation results show that the proposed mechanism achieves significant performance improvement in multichannel cognitive radio ad hoc networks.