Intra and Inter Cluster Synchronization Scheme for Cluster Based Sensor Network
V. Shunmuga Sundari, N. Mymoon Zuviria · 2014
Cluster based wireless sensor network (CWSN) is one of the approaches to reduce the energy consumption of wireless sensor network. In this network communications are categorized into two types that are intra cluster communication among sensors in the same cluster of the network and inter cluster communication among different cluster of the network. If these two communications are not handled properly, communication efficiency and network performance will be degraded. In this paper, intra and inter cluster synchronization scheme for cluster based sensor network is proposed which has two scheduling approaches that synchronize both intra- and inter cluster communication. In the first approach an efficient Cycle-Based synchronous Scheduling (CBS) is proposed to achieve low average packet delay and high throughput by optimizing the cycle length and transmission order. In the second approach, a Relay-Based asynchronous Scheduling (RBS) is developed to eliminate the necessity of communication synchronization so that packets are transmitted with no synchronization delay, yielding very low end-to-end packet delay. This synchronization scheme integrates both CBS and RBS without any interruption on data gathering during switching, which allows the network to utilize the benefits of both approaches to meet the stringent requirement of delay sensitive applications.