Catalogue


Positive Orthogonal Code-based Cooperative Forwarding for VANETs.
Zhang, Le.
imprint
2010.
description
84 leaves.
ISBN
9780494723593
format(s)
Microform, Thesis
Holdings
More Details
author
imprint
2010.
isbn
9780494723593
restrictions
Electronic version licensed for access by U. of T. users.
dissertation note
Thesis (M.A.Sc.)--University of Toronto, 2010.
general note
Source: Masters Abstracts International, Volume: 49-05, page: .
local note
ROBARTS MICROTEXT copy on microfiche.
abstract
Vehicular Ad hoc Networks (VANET) consist of radio-equipped vehicles and roadside units (RSU) and support many safety and commercial applications. Multi-hop forwarding can extend the communication range of both RSUs and vehicular broadcasts. Recently, the use of Positive Orthogonal Codes (POC) as transmission patterns of repetition-based broadcast medium access control (MAC) for safety messages has been proposed. This thesis proposes a cooperative forwarding protocol in which multiple relays at each forwarding hop form a virtual relay and coordinate their transmission times to correspond to a POC codeword. The protocol thereby exploits spatial diversity while conforming to the POC-based MAC, resulting in fewer collisions and mitigating the effect of hidden terminals. The design is validated through NS2 simulations, which show comparable performance with other forwarding schemes while producing significantly less performance degradation for safety message broadcasts on the same channel.
catalogue key
7878732

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