快速內網及跨層換手機制與隨意網路之整合

Integration of Fast Intra-Network and Cross-layer Handoff (FINCH) with Ad Hoc Networks

歐孟暉(Meng-Hui Ou)

指導教授 ： 陳志成

國立清華大學/電機資訊學院/資訊工程學系/碩士(2006年)

https://doi.org/10.6843/NTHU.2006.00333

摘要

在IP網路中，Mobile IP被普遍地用來做為行動管理的機制。然而，使用Mobile IP卻會產生頗長的換手延遲(handoff delay)以及頗高的端對端延遲(end-to-end latency)。為了消除這些缺點，區域行動管理(micro-mobility management)的概念被提出來。而在目前所提出的區域行動管理機制中，大多都只有考慮在IP層的狀況。之前我們曾提出了「快速內網及跨層換手機制」(fast intra-network and cross-layer handoff)，則是一個同時考慮了鏈結層(link layer)和IP層的跨層區域行動管理機制。因為跨層的設計，該機制擁有較好的效能表現。ㄧ般來說，區域行動管理機制適用在「基礎架構網路」(infrastructure network)中，意即透過無線網路存取點(access point)來提供網路存取的服務。若將之整合至「隨意網路」(ad hoc network)，則可將網路存取的範圍擴張到存取點的涵蓋範圍之外。區域行動管理與隨意網路的整合方法也已經被提出過。在本篇論文中，我們將「快速內網及跨層換手機制」與兩種不同型態的隨意網路路由協定做整合，分別為DSDV (Destination-Sequenced Distance-Vector)和AODV (Ad-hoc On Demand Distance Vector)，並將之也改成了跨層的設計，以符合快速內網及跨層換手機制的概念。我們並使用模擬的程式來評斷其效能表現，結果顯示跨層的整合機制會有較好的表現。而使用不同的隨意網路路由協定來做整合，則會各自在不同的方面表現出較好的效能。

關鍵字

區域行動管理 ； 隨意網路 ； 跨層

並列摘要

Mobile IP (MIP) has been proposed by the IETF as the mobility management protocol in IP networks. However, MIP might cause long handoff latency and high end-to-end delay.
In order to minimize the inefficiency in MIP, micro-mobility management protocols have been proposed. However, most of them consider the mobility management at IP layer only. Unlike other proposals, earlier we have proposed Fast Intra-Network and Cross-layer Handoff (FINCH) which considers the mobility management at both link and IP layers. Because of the cross-layer design, the performance improvement is significant. Normally, micro-mobility management protocols are used in infrastructure networks, which provide Internet access through access points in the range of single wireless hop. Some protocols have been proposed to integrate micro-mobility management protocols with ad hoc networks, which extend the range to multiple hops away from an access point. In this thesis, we propose the integration of FINCH with two types of ad hoc routing protocols, Destination-Sequenced Distance-Vector (DSDV) and Ad-hoc On Demand Distance Vector (AODV). We also adapt the ad hoc routing protocols into the cross-layer design. The performance of our design is evaluated by extensive simulation. Results show that the cross-layer design outperforms those without crossing layer. The FINCH could be used with different ad hoc routing protocols. It is a trade-off between different performance metrics.

參考文獻

[2] “IEEE. Std 802.11: Wireless LAN medium access control (MAC) and physical layer (PHY) specications,” Nov. 1997.

[3] J.-C. Chen and P. Agrawal, “Fast Link Layer and Intra-Domain Handoffs for Mobile Internet,” 2000.

[4] C. E. Perkins and P. Bhagwat, “Highly Dynamic Destination-Sequenced Distance-Vector Routing (DSDV) for Mobile Computers,” 1994.

[7] A. Campbell, J. Gomez, S. Kim, A. Valko, and C. Y. Wan, “Design, Implementation, and Evaluation of Cellular IP,” IEEE Personal Communications, pp. 42-49, Aug. 2000.

[8] R. Ramjee, T. L. Porta, S. Thuel, K. Varadhan, and S. Wang, “HAWAII: A Domainbased Approach for Supporting Mobility in Wide-area Wireless Networks.” available