Integrated power‐saving scheduling algorithm in IEEE 802.16e networks

Abstract

In IEEE 802.16e networks, with the popularisation of multimedia services, multicast and unicast services can coexist in one mobile subscriber station (MSS). The mobile devices are generally powered by battery, which is limited in energy. Thus, power saving is an important issue to be considered for extending the lifetime of the MSSs. The authors have proposed a multicast services-based scheduling (MSBS) algorithm that improves the energy efficiency of both unicast and multicast services, while satisfying the quality of service requirements of the MSSs in 802.16e wireless networks. MSBS schedules the packets in such a way that each packet is transmitted before its deadline and the energy consumed by the MSSs is reduced by minimising the number of state transitions by the MSSs. The simulation results show that MSBS can produce significant overall energy-saving and prolonged lifetime as compared to other scheduling schemes in 802.16e wireless networks.

Energy‐efficient packet transmission with unidirectional‐valve scheduling

“…On the one hand, the rate is non-decreasing in the offline case as learned from Theorem 2, and it is also approximated in the online case with massive simulations. On the other hand, the transmission energy increases with the increase of rate as shown in (3). With the HLD scheduling, another observation is that the energy consumption in the offline case is more than that in the online case.…”

“…Owing to the continuous increase of transmission bandwidth and the rapid development of semiconductor technology, ubiquitous wireless access to information is becoming a reality. However, to promote the wireless services, it is urgent to improve the energy efficiency [1][2][3][4]. On the one hand, from the perspective of operators, a large portion of operation expenditure is from the huge energy consumption, which is approximately 18% in the mature European market and at least 32% in India [5].…”