PROJECT TITLE :

A GTS Allocation Scheme to Improve Multiple-Access Performance in Vehicular Sensor Networks - 2016

ABSTRACT:

The IEEE 802.fifteen.four protocol is designed to flexibly support each real-time and rivalry-based services. When the beacon model is enabled, guaranteed time slot (GTS) scheduling can provide rivalry-free access to latency-sensitive services based on the time-division multiple-access mechanism. This characteristic makes IEEE 802.fifteen.4 the suitable candidate for vehicular sensor networks in that mobile nodes need to exchange packets with roadside units (RSUs) at intervals a restricted period. In this paper, using network calculus theory, we have a tendency to analyzed the connection between time-slot utilization and the corresponding access parameters, like packet arrival rate, burst size, and vehicles' mobility extent. Then, for a given variety of vehicles preparing to access an RSU, we have a tendency to proposed a time-sensitive weighted spherical-robin (TS-WRR) scheduler to boost the multiple-access performance, which will take the service delay demand, packet arrival rate, and vehicular mobility level under consideration. Next, the weight determination and time-slot allocation strategy of the TS-WRR scheduler were issued well, which incorporate the special limitations and application requirements in a very vehicle-to-infrastructure (V2I) communication environment. To create our model feasible for testing, we have a tendency to conjointly elaborately demonstrated the implementation procedure with pseudocode and simulator style. Numerical results show that our TS-WRR scheduler outperforms some classic schedulers such as 1st-Return Initial-Served and WRR, plus two latest works, i.e., implicit GTS allocation scheme and adaptive real-time GTS allocation mechanism in terms of delay guarantee and GTS utilization maximization in vehicular sensor networks.