Traffic Policing over Various Ad Hoc Networks and Inter-Vehicular Communications

In this paper the Policing Traffic Management (PTM) is applied to improve the Quality of Service (QoS) over Inter-Vehicular Communications (IVCS). Bangkok is the capital city, and it is crowned of Ad Hoc nodes such as Mobile Ad Hoc Networks (MANET), FleetNET, CARNET, BTSNET and electronic devices. Each network has unique data traffic characteristics. For MANNET, most traffic is video and voice traffic; BTSNET is data traffic; CARNET is data and video traffic; and FleetNET is voice and data traffic. BTSNET can be implemented in regular traffic patterns for helping other networks to use as intermediate nodes for delivering their traffic. But some places are congested and packet-drops are emerged which will degrade the QoS of Multimedia traffic. The proposed algorithm PTM is an extension of the Adaptive Rate Control algorithm (ARC) which mainly improves the QoS performance by adjusting data transmission rate, rather than the fixed rate, based on traffic priority as voice, video and data after the collection of current number of packet drop, each data rate and packet delay time. Besides, this scheme will allow some dropped packets to retransmit based on priority. Several simulations are performed using NS-2 and EZsim under the congested situation and the results from our proposed algorithm are compared to the ones from traditional method without policing scheme. We found impressive results that support our algorithm.