Grey Target Tracking and Self-Healing on Vehicular Sensor Networks

Abstract

The wireless vehicular sensor network (VSN) has been very useful for many transportation application systems, but it does not operate like the traditional wireless sensor network. For safety reason, the vehicle-vehicle and vehicle-gateway communication modes must be stable. The motion of the vehicle, the environment of the roads, and other uncertain traffic conditions all pose challenges to the system. Therefore, how to keep link stability becomes an important issue. In this paper, we propose a scheme that uses grey target tracking to self-heal or reroute in advance the weak link on an alternative route as failure occurs and makes the whole vehicular sensor network more stable. Although this scheme increases the average latency and control overhead, it supports higher survivability and effective reflections on rerouting.

Fuzzy-based target tracking on “Vehicular Grid Sensor Networks”

“…The input for the defuzzification process is the aggregate output fuzzy set, and the output is a single number. The previous fuzziness helps us to evaluate the rules, but the final output SafeThreshold (T s ) [9] of our fuzzy system has to be a crisp number i (ranged in 1 to I) [8] in Equation (2).…”

“…Consequently, in this system we use Sugenostyle fuzzy inference [9] to defuzzify the alarm distance in Safe Threshold, based on the following four steps.…”

“…In order to evaluate and compare the characteristics of the proposed schemes, we used fuzzy-based MAODV [9] and developed a grid network model as Fig. 1 to evaluate the rerouting performance on a multicast VGSN.…”

“…The parameters of the simulation are in Table 1. This simulation is performed in a square area of 1000m*1000m [9] with 10, 20, 30, 40 and 50 mobile nodes (vehicles) of randomly moving speed. Especially, for grid network computing, the road-to-road range is set to be 100m.…”

Adaptive Momentum-Based Motion Detection Approach and Its Application on Handoff in Wireless Networks

“…With the rapid development of wireless network technologies, the next generation wireless network is expected to integrate various wireless access technologies, such as Ultra-Wideband, WLAN, WiMAX, UMTS and 3GPP LTE to provide an all-IP communication environment and support various IP-based services, such as WWW, VoIP, IPTV, vehicle safety inspection [ 1 , 2 ], intelligent transport systems [ 3 ], security monitor [ 4 , 5 ] and homecare health, to mobile users anytime anywhere. In the environment, communication systems with various coverages could overlap one another.…”