AN ENERGY EFFICIENT CROSS-LAYER NETWORK OPERATION MODEL FOR MOBILE WIRELESS SENSOR NETWORKS

Wireless sensor networks (WSNs) are modern technologies used to sense/control the environment whether indoors or outdoors. Sensor nodes are miniatures that can sense a specific event according to the end user(s) needs. The types of applications where such technology can be utilised and implemented are vast and range from households’ low end simple need applications to high end military based applications. WSNs are resource limited. Sensor nodes are expected to work on a limited source of power (e.g., batteries). The connectivity quality and reliability of the nodes is dependent on the quality of the hardware which the nodes are made of. Sensor nodes are envisioned to be either stationary or mobile. Mobility increases the issues of the quality of the operation of the network because it effects directly on the quality of the connections between the nodes

Improving Wireless Sensor Network Performance Using MAC Protocols

Wireless sensor networks offers a wide range of applications that can be used in includes environmental monitoring, health structural monitoring, high end applications and security. However, WSN requires a constant power source. To operate efficiently various proposed MAC schemes have been proposed with the aim of achieving low energy consumption or high throughput depending on the application. This thesis proposes a scheme that offers both low energy consumption and high network throughput to enhance MAC protocols which are based on the theory of S-MAC protocol. The proposed scheme utilizes two control packets (particularly SYNC and RTS) and mix there functionalities in one control packet (shall be called SEEK) then this packet will be forwarded to the down stream nodes in a multi-hop fashion. Then apply this method on a MAC protocol that is based on S-MAC theory. The simulation results show that it is feasible to achieve low energy consumption using the proposed algorithm presented in this thesis. In conclusion, this thesis has shown that it is feasible to manipulate the construction of control packets to achieve better operation for a MAC protocol

AN ENERGY EFFICIENT CROSS-LAYER NETWORK OPERATION MODEL FOR MOBILE WIRELESS SENSOR NETWORKS

Wireless sensor networks (WSNs) are modern technologies used to sense/control the environment whether indoors or outdoors. Sensor nodes are miniatures that can sense a specific event according to the end user(s) needs. The types of applications where such technology can be utilised and implemented are vast and range from households’ low end simple need applications to high end military based applications. WSNs are resource limited. Sensor nodes are expected to work on a limited source of power (e.g., batteries). The connectivity quality and reliability of the nodes is dependent on the quality of the hardware which the nodes are made of. Sensor nodes are envisioned to be either stationary or mobile. Mobility increases the issues of the quality of the operation of the network because it effects directly on the quality of the connections between the nodes