Power saving through downlink scheduling in wireless ad hoc networks

Abstract

In this thesis, a scheduling scheme to reduce power consumption in the clustered ad hoc network is proposed. The proposed algorithm is a modification of Proportional Fair Algorithm (PFA). In the proposed scheme, if the user is in low power condition, he will be a candidate for scheduling when his channel status is good. Otherwise, the transmission to him will be suspended until his channel condition becomes better. The number of Data Rate Request Channel (DRC) submitted is also considered to save the power consumption. If a user is in the low power condition and his channel status is bad, he will not submit his DRC. Two schemes are simulated in the clustered ad hoc network environment. The channel condition is supposed to follow a Rayleigh distribution. The packet in the pseudo base station is generated based on a Poisson process. Through computer simulation, it can be seen that proposed scheme has higher energy efficiency, but higher average packet delay than conventional scheduling algorithm. Moreover, proposed scheme can keep the fairness between users. However, in our scheme, the fairness can be kept in each working period of each pseudo-BS only in the clustered ad hoc network.