A Sync-less MAC Protocol for Cognitive Radio Networks
- 주제(키워드) Cognitive Radio , Channel allocation
- 발행기관 고려대학교 대학원
- 지도교수 이원준
- 발행년도 2011
- 학위수여년월 2011. 8
- 학위구분 석사
- 학과 일반대학원 컴퓨터·전파통신공학과
- 세부전공 컴퓨터학과
- 원문페이지 39 p
- 실제URI http://www.dcollection.net/handler/korea/000000027287
- 본문언어 영어
- 제출원본 000045671723
초록/요약
Cognitive radio devices equipped with a single radio interface have the multi-channel hidden terminal problem and the existing decentralized channel allocation protocols solve the problem by utilizing strict time synchronization. To avoid the overhead caused by supporting the synchronization requirement, we propose the Sync-less Distributed MAC (SD-MAC) protocol exploiting a dedicated control channel. This approach enables some devices obtaining unoccupied channels to communicate with their receivers, while the other devices contend for channels in a control channel. The simulation results show that our protocol achieves higher throughput than the existing protocols.
more목차
Abstract
Contents
List of Tables
List of Figures
1 Introduction
2 Related Work
3 Backgrounds
3.1 Dedicated Control Channel (DCC) Scheme
3.2 Split Phase (SP) Scheme
3.3 Multi-channel Hidden Terminal Problem
4 SD-MAC Protocol
4.1 Channel Reservation
4.2 Channel Table & Neighbor Table
4.3 Data Transmission
4.4 Table Reset
5 Analysis
6 Performance Evaluation
6.1 Simulation Environments
6.2 Analytical results
6.3 Simulation Results
7 Conclusion & Future Work
References 27
