IEEE 802.16e 省電睡眠機制之系統實作

Abstract

The mobile IEEE 802.16e (WiMAX) environment has been considered a promoting wireless video multicasting technology. For example, mobile digital TV, which is one of video streaming service, can be supported in this environment. In order to support energy-consuming service like this, we need to operate some energy-saving mechanisms in the environment. In the IEEE 802.16e standard, some energy-saving mechanisms called “sleep mode operations” have been defined. Sleep mode operations can make connections between base station (BS) and mobile station (MS) enter sleep mode. While all of the connections enter sleep mode, MS can enter an energy-saving state. But in the standard, for real-time connections, it does not mention that how to switch a connection between awake mode and sleep mode. And the sleep mode operation for real-time connections can be more efficient about energy-saving and the Quality of Service (QoS) can be higher. So we have proposed “Two-Timer Mechanism” which can make real-time connections switch between awake mode and sleep mode, upgrade the efficiency of sleep mode operation, and improve the QoS. In this thesis, after a general structure of WiMAX MAC layer is analyzed, our Two-Timer Mechanism is designed and implemented in media access control (MAC) layer of WiMAX BS on the C platform provided by Institute for Information Industry (III). The conformance testing shows that MOB-SLP-RSPs conform to the standard. So it can work sleep mode operations on real-time connections successfully.