適用於IEEE 802.16j多節點傳送中繼網路，並整合基地台、中繼台、以及行動使用者之省電睡眠排程機制

Sleep Scheduling Mechanisms for Integrated Power Saving at the Base Station, Relay Stations and Mobile Subscriber Stations in IEEE 802.16j Multi-hop Relay Networks

余仲哲(Chung-Che Yu)

指導教授 ： 楊峻權

國立暨南國際大學/科技學院/資訊工程學系/碩士(2012年)

https://doi.org/10.6837/NCNU.2012.00268

摘要

在傳統的IEEE 802.16 網路中，Base Station (BS)下的Subscriber Station (SS)是固定不動的，在2006 年提出了IEEE 802.16e 讓SS 增加了具行動能力並稱之Mobile Subscriber Station (MSS)。目的是希望可以提供一個高頻寬及具移動性的無線寬頻都會網路，然而因行動設備如MSS，主要的電力來源為電池，在能源節省上成為重要的議題，在IEEE 802.16e 標準裡的有針對能源節省機制中作了基本訂定，但在原有的標準中並沒有考慮當時網路負載的變化量來做有效地調整，因此在之前的研究中提出根據網路流量負載變化去制定省電機制(Load Based Power Saving, LBPS)。在IEEE 802.16j時加入了轉傳中繼站(RS)來對當BS離MSS過遠或是因地形緣故導致資料無法由BS傳送至MSS時對資料做轉傳的動作，而在IEEE 802.16j中並沒有根據該網路環境制定出有關BS、RS以及MSS的省電機制，因此為了考量到節能減碳這項全球議題，本論文根據LBPS的研究為基礎制定了在IEEE 802.16j環境下的省電機制演算法LBPS-Aggr-MR以及LBPS-Merge-MR，以考量MSS省電為主要目標之餘，也思考提供行動設備連接之基地台(BS)及中繼台(RS)有休眠之機會，相信能在IEEE 802.16j達到MSS的省電使得電池存活時間增加且又可以在BS以及RS上達到省電進而達到本論文目的節能省碳。因此本篇論文建立在IEEE 802.16j環境下以LBPS為基礎分別提出了兩種演算法LBPS-Aggr-MR以及LBPS-Merge-MR方式針對基地台(BS)、中繼台(RS)行以及動設備(MSS)一同運作省電機制之排程設計，其中為了有效的增加省電效能以及降低資料的延遲提出了subframe切割傳輸方式改善了傳統IEEE 802.16j 資料傳輸方式，論文中以MSS省電為主要目標希望達成最大MSS省電量再一同達成BS以及RS節能，論文中透過模擬分析的結果，可以看出提出的機制在power saving將有不錯之成效。

關鍵字

802.16j ； 中繼台 ； 省電機制

並列摘要

In traditional IEEE 802.16 network environment, the Subscriber Station is fixed and doesn’t have the ability of mobility. In 2006 the IEEE 802.16e standard is proposed that the Subscriber Station has the ability of mobility and named Mobile Subscriber Station (MSS). The purpose of IEEE 802.16e standard is to provide higher bandwidth and mobility within Wireless Metropolitan Area Networks. However, due to mobile devices such as MSS, the capacity of battery power has been became an important issue in energy-saving mechanism. In energy-saving issue, the IEEE 802.16e standard has made a basic set of energy-saving mechanism, which does not consider about the condition of network traffic load. So in our previous research of power saving mechanisms, the idea of Load Based Power Saving (LBPS) has been proposed to adapt to the variation of traffic load.
In IEEE 802.16j network environment, relay station (RS) is added, which can forward the data when the Base Station (BS) is far away from the MSS or some topographical reasons that cause the data can not be transmitted from the BS to the MSS directly. IEEE 802.16j networks environment doesn’t design any energy-saving mechanism for the BS and RS. In order to solve the problem of energy-saving and reduce carbon emission, We elaborate two algorithms namely LBPS-Aggr-MR and LBPS-Merge-MR to achieve power saving of MSS, BS and RS in IEEE 802.16j network environment. In IEEE 802.16j multi-hop relay network, to reduce the delay of multi-hop transmission, the subframe transmission method is used in our proposed algorithm. Finally, simulation results have shown that our proposed mechanism has better performance.

並列關鍵字

802.16j ； Relay Station ； power saving

參考文獻

[1] IEEE Std. 802.11, “Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications,” Jun. 2003.

[2] IEEE Std. 802.11a, “Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: Higher Speed Physical Layer in the 5GHz Band,” Sep. 1999.

[3] IEEE Std. 802.11b, “Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: Higher Speed Physical Layer Extension in the 2.4GHz Band,” Sep. 1999.

[4] IEEE Std. 802.16-2004, “IEEE Standard for Local and Metropolitan Area Networks Part 16: Air Interface for Fixed Broadband Wireless Access Systems,” Oct. 2004.

[5] IEEE Std. 802.16e-2006, “Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems -Amendment for Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands,” Feb. 2006.