Dynamic TDMA slot reservation protocol for cognitive radio ad hoc networks
- Resource Type
- Conference
- Authors
- Kamruzzaman, S. M.; Alam, Mohammad Shamsul
- Source
- 2010 13th International Conference on Computer and Information Technology (ICCIT) Computer and Information Technology (ICCIT), 2010 13th International Conference on. :142-147 Dec, 2010
- Subject
- Communication, Networking and Broadcast Technologies
Computing and Processing
Bioengineering
Protocols
Ad hoc networks
Bandwidth
Quality of service
Time division multiple access
Cognitive radio
Throughput
TDMA
cognitive radio
ad hoc networks
QoS guarantee
dynamic frame length
- Language
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.