BUS-VANET: A BUS VEHICULAR NETWORK INTEGRATED WITH TRAFFIC

INFRASTRUCTURE

Abstract

With the development of wireless communications, Vehicular Ad Hoc Network (VANET) has

received considerable attention on information sharing and data delivery services. In order to

collect and control traffic conditions, Intelligent Transportations Systems (ITS) has deployed a

number of Road Side Units (RSUs) along the roads to collect and deliver traffic information to

the Traffic Control Center (TCC) for analyzing traffic data. Although some VANET

architectures have been proposed based on the predictable routes and schedules of buses, none of

them considered taking advantage of such traffic infrastructures which already been supplied by

ITS and combine them with scheduled buses. In this project, we propose a two-tier BUSVANET

that is fully integrated with RSUs and TCC as traffic infrastructures. In this new architecture, the

communications of vehicles, not only benefit from the existence of buses, but also consider the

effects of using RSUs and TCC. RSUs are used to ensure service coverage while TCC is helpful

for locating the destination vehicle quickly. We also investigate how much benefits can be

obtained by taking advantage of this type of traffic infrastructure.

Existing System

In existing, they have proposed the trajectory based statistical forwarding (TBD) for finding the

vehicle as the next hop to minimize the delivery delay from a vehicle to a RSU. Vehicles have to

share their trajectory with others for the encounter time prediction. In this way, vehicles can

select the next hop based on the estimated encounter point with less latency. However, these

trajectory based routing algorithms are hard to be realized in the real-world since people may not

want to share their own trajectories considering the privacy issue. In mobile infrastructure based

MANET, introduced architecture of a two-tier VANET, in which buses constitute the backbone

for data delivery. One tier is the vehicles while another composed of the buses. However, their

way of computing the connection time constrains that vehicles cannot change their speeds and

directions. They also did not consider taking advantage of traffic infrastructures to improve the

VANET performance.

Disadvantages

Did not take the advantage of traffic infrastructure

Vehicles cannot change their speed and direction

Existing routing protocols are hard to be realized in real world

Architecture

Proposed System

We propose a new BUS-VANET architecture which fully integrates traffic infrastructures with

buses and vehicles. We consider how to take advantages of RSUs and TCC that already been

provided by ITS to improve the VANET performance. Based on the proposed BUS-VANET, we

use the registration technology to improve the transmission performance and provide a new

method of selecting registration node to reduce the number of switches from common vehicles to

high-tier nodes. We also proposed a new scheme for identifying the destination location more

efficiently.

Advantages

Improves the traffic performance

Identify the destination location more efficiently

Higher delivery rate and shorter delivery delay

Conclusion

In this project, we propose a new two-tier BUS-VANET that fully integrated with traffic

infrastructures for improving the performance of VANET. We take advantage of RSUs and TCC

that already required and constructed by ITS and investigate how much benefits we can obtain

from this realistic environment. By integrating RSUs and TCC with buses, the coverage of the

high-tier nodes can be ensured and the possibility of packets carrying is reduced. TCC helps us

quickly identify the location of the destination vehicle. Comparing to traditional VANET, better

performance of our BUS-VANET can be achieved with less delivery delay and higher delivery

rate.

References

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