BRNT: Broadcast Protocol with Road Network Topology for Urban Vehicular Ad Hoc Networks

A Road Layout Based Broadcast Mechanism for Urban Vehicular Ad Hoc Networks

“…Therefore, the legacy schemes that leverages the non-real-time information and the implicit judgement about the message reception status of neighboring vehicles without careful considerations about the characteristics of urban roads need to be reconsidered. Similar to [20,21], [22] and a recent work [23] also proposed the broadcast mechanisms for urban roads that is supposed to be implemented above the MAC layer. In [22,23], differing from [20,21], the road layout information instead of the holding information from beacons is leveraged to minimize the vulnerability to the inaccuracy of information utilized in the forwarding vehicle decisions.…”

“…Similar to [20,21], [22] and a recent work [23] also proposed the broadcast mechanisms for urban roads that is supposed to be implemented above the MAC layer. In [22,23], differing from [20,21], the road layout information instead of the holding information from beacons is leveraged to minimize the vulnerability to the inaccuracy of information utilized in the forwarding vehicle decisions. The reliability, though, cannot be assured by the works in [22,23].…”

“…In [22,23], differing from [20,21], the road layout information instead of the holding information from beacons is leveraged to minimize the vulnerability to the inaccuracy of information utilized in the forwarding vehicle decisions. The reliability, though, cannot be assured by the works in [22,23]. For instance, in both [22,23], a vehicle that enters a road segment where the broadcast is just completed cannot receive the broadcast message.…”

“…The reliability, though, cannot be assured by the works in [22,23]. For instance, in both [22,23], a vehicle that enters a road segment where the broadcast is just completed cannot receive the broadcast message. In particular, [23] focuses on the broadcast efficiency to eliminate or minimize the redundant broadcast.…”

“…In particular, [23] focuses on the broadcast efficiency to eliminate or minimize the redundant broadcast. The delay for broadcast message dissemination, though, may become extraordinarily long in [23] if no vehicle exists at some or many of the intersections and the signal attenuation by surrounding obstacles prohibits the propagation of the broadcast message crossing over those intersections to reach the road segments at the other side of the intersection, as shown in Figure 2.…”