研究生: |
洪家琪 Chia-Chi Hung |
---|---|
論文名稱: |
無線網狀網路中可達到閘道器間負擔平衡及減少傳輸次數之閘道器部署設計 Design of Gateway Deployment to Achieve Load Balance among Gateways and to Reduce Transmission Times in a Wireless Mesh Network |
指導教授: |
馮輝文
Huei-Wen Ferng |
口試委員: |
馮輝文
Huei-Wen Ferng 鄭傑 Jay Cheng 張宏慶 Hung-Chin Jang 林嘉慶 Jia-Chin Lin 鍾國亮 Kuo-Liang Chung |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 資訊工程系 Department of Computer Science and Information Engineering |
論文出版年: | 2017 |
畢業學年度: | 105 |
語文別: | 中文 |
論文頁數: | 79 |
中文關鍵詞: | 物聯網 、無線網狀網路 、閘道器部署 、負擔平衡 、霍夫曼樹 |
外文關鍵詞: | Internet of Things, Wireless Mesh Network, Gateway Deployment, Load Balance, HuffmanTree |
相關次數: | 點閱:356 下載:2 |
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隨著科技發展日新月異,以機器對機器(Machine-to-Machine, M2M)技術為通訊基礎的物聯網(Internet of Things, IoT)之應用相當廣泛,機器們透過連接至網路來達到更多使用上的需求,也更貼近人類使用的習慣。然而,這些IoT應用之設備數量將逐漸增加且廣泛地應用於生活週遭,部分應用之設備將會根據各自不同的需求而有不同傳輸資料的頻率來進行資料的搜集,且設備本身的設計可能有著不同的協定,此時做為設備與網路之間橋樑的閘道器就扮演一個重要的角色。若使用目前極為普及的無線網狀網路(Wireless Mesh Network, WMN)來做為通訊網路,將以無線多重跳躍(Wireless Multi-Hop)的方式來傳遞資訊,故設備間可能需要路由器的介接來幫助傳送資料到所屬的閘道器。在有眾多具備自動傳送訊息的IoT設備之環境中,若閘道器部署位置不理想將造成設備的資料傳輸次數龐大,就需要額外使用更多能源來完成資料傳送。因此,本研究提出適用於無線網狀網路中閘道器部署演算法,其在滿足基本服務品質(Quality of Service, QoS)需求前提下,不僅可平衡各閘道器間的負擔,又可有效地降低資料傳送的次數,以因應IoT時代的來臨,透過充分之模擬比較,本研究所提之演算法在負擔平衡及資料傳送次數方面確實有其功效且優於文獻上之相關演算法並值得推薦於無線網狀網路中使用。
With the advancement of the machine-to-machine (M2M) communication technology, more and more devices do not stand alone but are interlinked. Nowadays, lots of applications, such as Internet of things (IoT) use this technology. Because the applications of IoT are quite diverse and applied to our daily life, the number of M2M devices will be raised gradually. In the past, most of papers employed a wireless mesh network (WMN) to implement the M2M communication. In a WMN, the wireless multi-hop communication is applied to transmit information from the source to the gateway to access the Internet. However, the devices of different IoT applications have different frequencies of data transmission and different protocols as well. Therefore, gateways play an important role and act as communication bridges between the WMN and the Internet, showing the importance of gateway deployment. If gateways are not selected appropriately, additional energy will be consumed for data transmission. To touch the aforementioned issue properly, a gateway deployment algorithm in a WMN is proposed in this thesis. Such an algorithm can not only meet the basic quality-of-service (QoS) requirement but also balance the load among gateways successfully and reduce the transmission times effectively. Through extensive simulations, we successfully show that the proposed algorithm can indeed balance the load among gateways and reduce the transmission times effectively. It outperforms the closely related algorithms in the literature for sure and is highly recommended for use in a WMN.
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