Mobility management for mobile sinks using soft handover in large-scale sensor fields

Wireless sensor networks are composed of a lot of sensor nodes and they are used to monitor environments. Since many studies on wireless sensor networks have considered a stationary sink node, they cannot provide fully ubiquitous applications based on a mobile sink node. In this paper, we forecasted mobile course through data communication between a mobile sink and fixed nodes and proposed plan to renew routing path continuously without losing path in large scale networks based on multi-sink as utilizing soft handover technique which is for maintaining in case of a movement between networks of a mobile terminal. We verified performance of new protocol using Multi-Sink through experiment based on TinyOS and analyzed the result according to the different speed of mobile sink.

I. Introduction

While there exist a number of routing protocols for wireless sensor routing, most of these protocols are designed for static environments in which the sink nodes are stationary. Hence, such protocols cannot support various application needs in a mobile environment [1].