M2M通訊中移動性對回報機制影響之研究

Abstract

M2M(machine-to-machine，簡稱M2M)通訊提供了一個無所不在的感測環境，可在特定區域內針對即時監控之應用提供低建置成本的方案。在即時監控這個M2M的主要應用中M2M閘道(M2M Gateway)可透過M2M節點(M2M Nodes)所回傳的感測資料來達到對於感測區域(sensing regions)的有效監控。在即時監控之應用中，M2M節點傳送感測資料給M2M閘道的電量消耗是一個影響系統效能的主因。在本篇論文中，我們設計了集中式與分散式的回報機制同時考慮的電量的消耗以及感測資料的有效性，同時分析了機制的複雜度。我們透過電腦模擬實驗來探討所提機制之效能並發現M2M節點具有移動性時分散式機制的效能會優於集中式機制。

In Machine-to-Machine (M2M) communications, machines are wirelessly connected to accomplish collaborative tasks without human intervention, and provide ubiquitous solutions for real-time monitoring. The real-time monitoring application is one of the killer applications for M2M communications, where M2M nodes transmit sensed data to an M2M gateway, and then the M2M gateway can have real-time monitoring for each sensing region. In real-time monitoring application, the energy consumption for the M2M nodes to send sensed data to the M2M gateway is an important factor that significantly affects the performance of the system. In this paper, we first consider the energy consumption as well as the validity of sensed data to design either centralized or distributed energy-efficient reporting mechanisms. We then analyze the complexity of the reporting mechanisms. Simulation experiments are conducted to investigate the performance of the proposed mechanisms, and show that the distributed mechanism outperforms the centralized mechanism when the M2M nodes are mobile.