基於能源考量的媒介存取控制層協定於多重頻道存取的無線隨意網路

IEEE 802.11標準協定提供了多重頻道來供應使用者使用。但是，他並沒有提供任何多重頻道的媒介存取控制層協定。所以近年來在無線隨意網路的多重頻道媒介存取控制層協定受到很多關注。這些多重頻道的媒介存取控制層協定通常注重在吞吐量方面的改進。但是他們卻沒有很仔細得考慮到能源消耗的部分。由於電池電量在無線隨意網路是一個受到限制的資源，所以省電議題必須要納入考量。為了在多重頻道無線隨意網路達到高能源效率，我們提出了一個媒介存取控制層協定來省電。第一，我們充分利用多重頻道以及協調者系統來改進ad hoc traffic-indication map (ATIM) window的協調結構。第二，我們利用排程系統來避免資料視窗的競爭。排程演算法允許更多工作被分配以及減少能源消耗。我們模擬了三種不同資料流量的情境。結果顯示我們的協定達到了高效率的能源消耗。

關鍵字

行動式隨意網路；媒介存取控制層協定；多重頻道；省電模式；排程

並列摘要

IEEE 802.11 standard [1] provides multiple channels for use. However, it doesn’t have any multi-channel medium access control (MAC) protocols. Therefore, multi-channel MAC protocols in wireless Ad Hoc network have received much attention in recent years. Most of these MAC protocols focus on the throughput improvement. However, they don’t consider the power consumption carefully. The power saving issue needs to be considered because the battery power is a constrained resource in wireless Ad Hoc network. To achieve high energy efficiency in multi-channel wireless Ad Hoc network, we propose a MAC protocol to save energy. First, we improve the negotiation scheme in ad hoc traffic-indication map (ATIM) window by fully utilizing multiple channels and the coordinators scheme. Second, we use scheduling mechanism in Data window to avoid contention. The scheduling algorithm allows more tasks to be assigned and reduces the power consumption. We simulate three different traffic load scenarios. The results show that our protocol achieves high energy efficiency.

並列關鍵字

MANET ； MAC protocol ； Multi-channel ； Power saving mode ； Scheduling

參考文獻

[3] J. H. Jun, Y. J. Choi, and S. Bahk, "Power-saving schedulers for a WLAN with task-linking topology awareness," IEEE Transactions on Vehicular Technology, vol. 56, pp. 1345-1356, 2007.

[4] A. Bhardwaj, Divya, and S. Sofat, "An efficient energy conserving scheme for IEEE 802.11 Ad hoc networks," IFIP International Conference on Wireless and Optical Communications Networks, pp. 1-5, 2007.

[5] E. S. Jung and N. H. Vaidya, "A power saving mac protocol for wireless networks," University of Illinois at Urbana-Champaign, Tech. Rep, 2002.

[6] S. Takeuchi, K. Yamazaki, K. Sezaki, and Y. Yasuda, "An improved power saving mechanism for MAC protocol in ad hoc networks," in Global Telecommunications Conference, IEEE, pp. 2791-2796 Vol.5, 2004.

[7] T. C. Huang, J. H. Tan, and C. C. Huang, "A traffic-load oriented power saving mechanism for MAC protocol in Ad hoc networks," in Wireless Communications and Networking Conference, IEEE, pp. 242-247, 2007.

國際替代計量

基於能源考量的媒介存取控制層協定於多重頻道存取的無線隨意網路

全文下載

主題瀏覽