Abstract-Vehicle-to-vehicle communication protocols may be bility as shown in Fig. 1 . V2V messages may be routed based broadly classified into in three categories; bounded-delay safety on fixed waypoints rather than across a set of mobile nodes. alerts, persistent traffic warnings and streaming media for telem-Furthermore, unlike TCP/IP, upon reaching the destination the atics applications. We focus on the first category of time-critical traffic alert and warning messages are not terminated but may messaging as is it of greatest value to the driver and passengers. Safety alerts are transmitted from a vehicle during events such persist and be rebroadcast in the relevant geographic region as loss of traction, sudden braking and airbag deployment. The until the traffic incident is resolved. objective for a safety protocol is to relay messages across multiple The primary goal for a V2V safety protocol is to deliver the vehicles within a 1.5-2km distance to alert approaching vehicles alert to all approaching vehicles in the 1.5km to 2km range within a bounded end-to-end delay (e.g. 1.5 sec). Due to high mobility and ephemeral connectivity we must employ broadcast from the icident so that drivers may be alerted prior to their protocols, as well as mitigation strategies to curtail inherent issues natural visual reaction. This imposes a tight end-to-end delay associated with broadcast protocols, such as broadcast storm requirement on all messages and is on the order of 1.5 to problem. In this paper, we present a Location Division Multiple 2 seconds. Due to the high mobility and ephemeral nature Access (LDMA) scheme to suppress the broadcast storm problem of link connections, V2V protocols are broadcast-based and and ensure bounded end-to-end delay across multiple hops. This h scheme requires participating vehicles to time synchronize with hence suffer from the broadcast storm problem [3] with a the GPS time and receive the regional map definitions consisting large variance in end-to-end delay. In this paper we study of spatial cell resolutions and temporal slot schedules via an a deterministic solution to this problem in the context of out-of-band FMIRDBS control channel. We use the GrooveNet vehicular ad hoc networks (VANET). We achieve this by vehicular network virtualization platform with realistic mobility, synchronizing all vehicles and scheduling grid-based spatial car-following and congestion models to evaluate the performance regions in a pipelined manner. As each vehicle is equipped of LDMA in simulation and on the road.
The authors in REF proposed a new Location Division Multiple Access (LDMA) capable of delivering messages across multiple hops in a very short time without causing a broadcast storm.
Bounded-Latency Alerts in Vehicular Networks
2007 Mobile Networking for Vehicular Environments
2007 Mobile Networking for Vehicular Environments
Engineering