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Context-Aware Two-Level QoS Routing in Vehicular Ad-Hoc Networks

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Abstract
Vehicular ad hoc networks have received considerable attention in recent years. Being a subclass of mobile ad hoc networks, VANETs have some different characteristics than MANETs such as, fast moving nodes and frequent disconnections in the network. Existing routing protocols of MANETs do not perform well under these dynamic conditions in VANETs. This thesis presents a two-level context-aware routing protocol based on road connectivity in VANETs with QoS guarantee called Context-aware Two-level QoS Routing (CTQR) designed specifically for inter-vehicle communication in urban and/or highway environments. A distinguished property of CTQR is its ability to not only discover the available paths between source and destination pairs, but also to re-adjust the paths on the fly, without starting a new destination discovery process. It can select the best available path based on QoS parameters that are calculated using the vehicle context such as, velocity. Unlike other routing protocols, the path from source to destination is made by road ids. Gateway nodes help in locating the destination, forwarding the packets from one road segment to other, and calculating the QoS parameters. For the evaluation of CTQR protocol, extensive simulations were performed and results show that CTQR can help in design and deployment of VANETs.
Author(s)
Zubair Amjad
Issued Date
2016
Awarded Date
2016. 8
Type
Dissertation
URI
http://dcoll.jejunu.ac.kr/jsp/common/DcLoOrgPer.jsp?sItemId=000000007687
Alternative Author(s)
Amjad, Zubair
Department
대학원 컴퓨터공학과
Advisor
안기중
Table Of Contents
Acknowledgments iv
Abbreviations . vi
Abstract . 1
1 Introduction . 2
1.1 Background . 2
1.2 Context of research . 7
1.3 Outline . 7
2 Literature Review . 8
2.1 Routing 8
2.2 QoS 9
2.3 Gateway nodes 11
3 Context-Aware Two-Level Routing 12
3.1 Neighbor Tables 13
3.1.1 Context Aware Beaconing 17
3.1.2 Path weight calculation 20
3.2 Path Discovery . 23
3.3 Packet Forwarding over Discovered Path . 27
3.4 Path Maintenance . 28
3.4.1 Gateway vehicles in path maintenance . 29
4 Evaluation and Results . 30
4.1 Simulation Setup . 30
4.2 Evaluation Metrics 32
4.2.1 Packet delivery ratio 32
4.2.2 End-to-end delay . 32
4.2.3 Routing overhead 32
4.2.4 Link failure ratio 33
4.3 Simulation Results . 33
4.3.1 Packet delivery ratio 33
4.3.2 End-to-end delay . 35
4.3.3 Routing overhead 37
4.3.4 Link failure ratio 39
4.3.5 Effect of α on protocol performance 40
5 Conclusion and Future Work 42
References . 45
Degree
Master
Publisher
제주대학교 대학원
Citation
Zubair Amjad. (2016). Context-Aware Two-Level QoS Routing in Vehicular Ad-Hoc Networks
Appears in Collections:
General Graduate School > Computer Engineering
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