A Stepwise and Hybrid Trust Evaluation Scheme for Tactical Wireless Sensor Networks.

Jihun Lim,Dooho Keum,Young-Bae Ko

doi:10.3390/s20041108

Abstract

In tactical wireless sensor networks, tactical sensors are increasingly expected to be exploited for information collection in battlefields or dangerous areas on behalf of soldiers. The main function of these networks is to use sensors to measure radiation, nuclear, and biochemical values for the safety of allies and also to monitor and carry out reconnaissance of enemies. These tactical sensors require a network traffic flow that sends various types of measured information to the gateway, which needs high reliability. To ensure reliability, it must be able to detect malicious nodes that perform packet-dropping attacks to disrupt the network traffic flow, and energy-constrained sensors require energy-efficient methods to detect them. Therefore, in this paper, we propose a stepwise and hybrid trust evaluation scheme for locating malicious nodes that perform packet-dropping attacks in a tree-based network. Sensors send a query to the gateway by observing the traffic patterns of their child nodes. Moreover, depending on the situation, the gateway detects malicious nodes by choosing between gateway-assisted trust evaluation and gateway-independent trust evaluation. We implemented and evaluated the proposed scheme with the OPNET simulator, and the results showed that a higher packet delivery ratio can be achieved with significantly lower energy consumption.

Highlights

In tactical wireless sensor networking environments, various tactical sensors are deployed to collect information from battlefields or dangerous areas on behalf of soldiers in consideration of their safety
A unattended ground sensor (UGS) is a long-range wireless communication sensor that can be installed and retrieved directly. It is divided into two types: tactical-UGS is a compact ground-based sensor deployed on the battlefield that collects chemical, biological, radiological, and nuclear information, and urban-UGS, a sensor that is installed in urban areas for surveillance of enclosed areas such as buildings, sewers, and tunnels
We focus more on the packet delivery ratio and energy consumption for the simulation result, as our goal is to reduce the energy consumption and to detect malicious nodes by proposing a stepwise and hybrid trust evaluation scheme

Summary

Introduction

In tactical wireless sensor networking environments, various tactical sensors are deployed to collect information from battlefields or dangerous areas on behalf of soldiers in consideration of their safety. A UGS is a long-range wireless communication sensor that can be installed and retrieved directly It is divided into two types: tactical-UGS is a compact ground-based sensor deployed on the battlefield that collects chemical, biological, radiological, and nuclear information, and urban-UGS, a sensor that is installed in urban areas for surveillance of enclosed areas such as buildings, sewers, and tunnels. These sensors have gateways to collect data and send them to an external command center. This may be undesirable to the sending of the aforementioned tactical data information

Objectives

Results

Conclusion