tailieunhanh - Mobile and wireless communications physical layer development and implementation Part 14

Tham khảo tài liệu 'mobile and wireless communications physical layer development and implementation part 14', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 14 A Unified Data and Energy Model for Wireless Communication with Moving Senders and Fixed Receivers Armin Veichtlbauer and Peter Dorfinger Salzburg Research Forschungsgesellschaft mbH Austria 1. Introduction In recent years the question of energy efficiency in ICT solutions has grown to a hot topic both in research and in product development. Especially for applications in the field the efficient use of the available stored or newly generated energy is a precondition for the desired functionality. Energy wasting is not only a question of expenses or of impacts to the environment but in many cases simply precludes the proper working of a sensor actuator control system. Our research group has conducted several research projects during the last years in the area of protocol optimisation in order to increase energy efficiency of wireless communication. First we developed an energy model to conduct simulations which describe the energy consumption of sending a well defined amount of data over a wireless link with fixed properties. As variable parameters of this model we used the transmission power of the sending antenna and the packet length of the transmitted data. This model already included a stochastic part The loss of the transmitted packets. The packet loss probability was evidently dependent on the sending power. So far we followed the model of the group around . Ebert and A. Wolisz Ebert et al. 2000 Ebert et al. 2002 . We then integrated a data model to simulate the amount of newly produced data respectively data that has remained in the sending buffer thus we generated a unified data and energy model. Finally we integrated a distance model to simulate the changing distances between the sender and the receiver. As a matter of simplicity but without spoiling the capabilities of the model we assumed that the receiver is fixed and the sender is moving Veichtlbauer Dorfinger 2007 . We conducted our research work within funded research projects Autarchic Ski .