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Abstract
Recent advances 11l micro-electro-mechanical systems (”’fEMS) technology, wireless communications, and digital electronics have enabled the development if low-cost, low-power, multifunctional sensor nodes that are small in size and communicate untethe,-ed in short distances. These tiny sensor nodes, which consist C!.fsensing, data processing, and communicating components, leverage the idea if ’Fireless Sensor Networks based on collaborative iffort if a large number if nodes. Wireless Sensor Networks introduced many usiful applications such as militmy, environmenta~ health, home and commercial applications.
Research in JVireless Sensor Networks has led to many new protocols specifically designed fir sensor networks where energy awareness is an essential consideration. Most if the attention, however, has been given to the routing protocols since they might differ depending on the application and network architecture. Research in routing is very challenging as JVireless Sensor Networks assume no global addressing schemes, node mobility should be conside,-ed and the limited power if sensor nodes.
This thesis proposes and evaluates a modification to the Gradient Based Routing (GBR) protocol (we call it Range Switching) and shows that the modification if combined with some network traffic spreading schemes can increase the ’Fireless Sensor Network life-time.
The thesis discusses the perfOrmance if Range Switching in terms if three pe’jOrmance measw’es, the packet loss, the ratio of dead nodes and the total energy consumption. A mathematical model is described to prove the ifficiency if the proposed model. The mathematical model shows that a 20% gain in the network throughput can be achieved with Range Switching. In addition, the thesis p,’esmts some simulation ,’esults that prove the ifficiency of Range Switching.