Location Based MAC Protocol with Directional Antennas for Multi hop Wireless Networks
- 발행기관 아주대학교
- 지도교수 Prof. Jae-sung Lim
- 발행년도 2013
- 학위수여년월 2013. 8
- 학위명 석사
- 학과 및 전공 일반대학원 컴퓨터공학과
- 실제URI http://www.dcollection.net/handler/ajou/000000015059
- 본문언어 한국어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
In multi hop wireless networks environment destination node is situated at distance of multiple hops far away from source node. Existing MAC schemes in multi hop wireless Networks (MWN) suffer from large end-to-end packet delay, interference, inefficient channel utilization, and degraded throughput. In this thesis work we propose a MAC scheme that overcomes the limitations of current MAC protocols in MWN and uses directional antenna for data packet transmission and Omni antenna for control packet transmission. The proposed MAC scheme classified as scheme-I that first reserves channel before data packets are transmitted directionally, and scheme-II that uses pipelined approach and overlaps the Omni directionally transmitted control packets and directionally transmitted data packets in time. Our proposed MAC scheme handles hidden terminal problem and related packet collision in MWN environment by employing M-RTS/M-CTS which is extended version of ordinary CSMA/CA RTS/CTS packets to inform other neighbors to refrain from harming the ongoing transmissions.
more목차
Chapter 1 Introduction 8
1.1. Background 8
2.2. Thesis Motivation and Contribution 10
Chapter 2 Related Works 11
2.1. Channel reservation mechanism 12
2.2. Data transmission mechanism 13
Chapter 3 Proposed MAC Protocol 16
3.1. Location Based MAC Protocol with directional antennas for MWN 16
3.2. Frame structure 16
3.3. Proposed MAC scheme-I 17
3.3.1. Channel reservation phase 17
3.3.2. Data transmission phase 19
3.4. Proposed MAC scheme-II 20
Chapter 4 Performance Analysis and Evaluation 23
4.1. Performance Evaluation Model 23
4.2. Performance Analysis 24
4.2.1. Throughput analysis 24
4.2.2. End-to-End packet delay analysis 29
4.3. Numerical Evaluation 30
4.3.1. Throughput Numerical evaluation 31
4.3.2. End-to-End packet delay Numerical evaluation 33
Chapter 5 Conclusion 35
REFERENCES 36
