Survivability evaluation index systems and evaluation models for Wireless Sensor Networks

Survivability evaluation index systems and evaluation models are important basis for evaluating network survivability. The Analytic Hierarchy Process (AHP) is a common system evaluation method, but it cannot reflect the mutual influence among evaluation indexes. In order to overcome the defects of AHP, the survivability evaluation index set of Wireless Sensor Network (WSN) in emergency communications is selected comprehensively, and establishes a survivability index system of WSN based on the Analytic Network Process (ANP). Then, a survivability evaluation model for clustering WSN based on semi-Markov Process (SMP) is put forward in this paper, and a SMP-based survival state transition diagram of cluster head is given. Survivability evaluation index systems and evaluation models are not only helpful to accessing the survivability of WSN in emergency communications objectively and effectively, but also to providing reference basis for the actual deployment and application of WSN.