To satisfy the requirements for mobile computing,the mobile middleware was introduced into the development of mobile application to improve the scalability and adaptability of the mobile system.The requirements for the mobile middleware were introduced.A service-based mobile middleware model was advanced.This model involved the use of several middleware distributed in the mobile computing system to support the system scalability.Architecture and design of the mobile middleware model were introduced and its performance was discussed in depth.

Model and design of adaptive mobile middleware supporting scalability

Wireless Sensor networks operate in a low energy mode and consume less power. The ultimate challenge of a sensor node is to make the lifetime of the node increase by which the energy consumption is so minimal. This paper addresses a mechanism by which the distance between any source and destination nodes is used by the source nodes to decide whether transmission of the message to destination node must be multi-hop or direct transmission by simply boosting the node power. The network size and the topology are considered for determining the threshold value for the distance based on which the decision is made. The simulation results have shown that the proposed method, DHBT, can increase the lifetime of the sensor network by at least 130% when compared to the legacy systems.

T. S. PradeepKumar

Papers

Energy Optimisation using Distance and Hop-based Transmission (DHBT) in Wireless Sensor Networks - Scheme and Simulation Analysis.