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In vehicle-to-vehicle (V2V) communications, low delay and long propagation distance are very important for multi-hop safety-related message broadcasting. Most earlier studies focused on one-hop broadcasting while little attention has been paid to multi-hop delay and propagation distance. In this study, a new model for analysing the connectivity probability, average hop count and one-hop delay of multi-hop...
This paper proposes a roadside unit (RSU)-coordinated synchronous multi-channel medium access control (MAC) scheme for vehicular ad hoc networks (VANETs). The proposed scheme allows the on board unit (OBU) to reserve service channels (SCHs) on the control channel (CCH) during almost the whole synchronous interval and supports simultaneous transmissions on different SCHs. It enhances the performance...
This paper proposes a location-assisted random medium access control (MAC) scheme for distributed vehicular ad hoc networks (VANETs). Consider a vehicular network with a wireless bandwidth of ?? orthogonal channels that shared by multiple vehicles. Efficient distributed channel access mechanism should be used to improve the bandwidth utilization. We observe that each vehicle has a unique location,...
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