在IEEE 802.16e網路下以流量為基礎之BS與MSS整合省電機制

Abstract

In traditional IEEE 802.16 networks, Subscriber Station (SS) is fixed in Base Station (BS), while in IEEE 802.16e, the networks created in 2006, SS was equipped with mobility and known as Mobile Subscriber Station (MSS). The objective of MSS is to provide wireless broadband networks with high bandwidth as well as mobility. However, the main source of electricity for mobile devices, such as MSS, comes from batteries. Energy saving therefore has become a critical issue. Basic standards have been set up for the energy saving mechanisms in the IEEE 802.16e networks, but the existing energy saving standard does not take into account the changes in network load to effectively adjust the amount of power saving accordingly. To modify the standards, we proposed Load Based Power Saving (LBPS), a power saving scheme based on network traffic load, in our previous research. Furthermore, considering the global carbon emission issue, we suggest a supplementary method to raise the power saving efficiency by applying sleep mode to Base Station, along with power saving mechanism on MSS in response to network traffic load. That is, if we could integrate the power saving mechanism of MSS and BS, not only could we save on the batteries power, but we could aggressively reduce Base Station’s power consumption. In this thesis, we show the scheduling of integrating the power saving mechanism of BS and MSS at the first stage. We expect to see a progress on power saving by combing the two. In the later stage, through the result of simulation analysis, the mechanism we suggested by applying dormancy mode to Base Station has a significant result on power saving. In the mean time, IEEE 802.16 mobile networks still sustain the data transmission function effectively under the integrated power saving mechanism we suggest.