Medium Access Control for Inter-gateway Handoff Support in Multi-hop Wireless Mesh Networks

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LI, H. A. O. P. E. N. G. (2012). Medium Access Control for Inter-gateway Handoff Support in Multi-hop Wireless Mesh Networks. Unc Charlotte Electronic Theses And Dissertations.
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Abstract

Wireless mesh networks (WMNs) have emerged to be a key wireless technology to support large-scale wireless Internet access. Seamless inter-gateway handoff support is an essential issue to ensure continuous communications in multi-hop WMNs. When the movement of a mobile mesh node (MN) causes its attachment point change in the Internet, the complete handoff process may include two steps: the link-layer handoff and the network-layer handoff. During the network-layer handoff, network-layer signaling packets need to be transmitted between the MN and the Internet via the multi-hop wireless mesh backbone. Due to the multi-hop transmission ofnetwork-layer handoff signaling packets, the handoff performance inWMNs can be largely degraded by the long queueing delay and medium access delay at each mesh router, especially when the backbone traffic volume is high. However, this critical issue is ignored in existing handoff solutions of multi-hop WMNs. In addition, the channel contention between data packets and handoff signalingpackets is not considered in existing medium access control (MAC)designs.In this research, the seamless handoff support is addressed from adifferent perspective. By eliminating channel contentions betweendata and handoff signaling packets, the queueing delay and channelaccess delay of signaling packets are reduced, while data throughput is maintained. Since various WMNs have different channel resources and hardware cost requirements, four MAC schemes are proposed to improve the multi-hop handoff performance in single-channel single-radio, single-channel multi-radio, multi-channel single-radio, and multi-channel multi-radio WMNs. With the proposed MAC schemes, the inter-gateway handoff performance can be improved significantly in multi-hop WMNs.

Details
Author

LI, HAOPENG

Title

Medium Access Control for Inter-gateway Handoff Support in Multi-hop Wireless Mesh Networks

Physical Description

1 online resource (120 pages) : PDF

Date

2012

Degree Granting Institution

University of North Carolina at Charlotte

Abstract

Wireless mesh networks (WMNs) have emerged to be a key wireless technology to support large-scale wireless Internet access. Seamless inter-gateway handoff support is an essential issue to ensure continuous communications in multi-hop WMNs. When the movement of a mobile mesh node (MN) causes its attachment point change in the Internet, the complete handoff process may include two steps: the link-layer handoff and the network-layer handoff. During the network-layer handoff, network-layer signaling packets need to be transmitted between the MN and the Internet via the multi-hop wireless mesh backbone. Due to the multi-hop transmission ofnetwork-layer handoff signaling packets, the handoff performance inWMNs can be largely degraded by the long queueing delay and medium access delay at each mesh router, especially when the backbone traffic volume is high. However, this critical issue is ignored in existing handoff solutions of multi-hop WMNs. In addition, the channel contention between data packets and handoff signalingpackets is not considered in existing medium access control (MAC)designs.In this research, the seamless handoff support is addressed from adifferent perspective. By eliminating channel contentions betweendata and handoff signaling packets, the queueing delay and channelaccess delay of signaling packets are reduced, while data throughput is maintained. Since various WMNs have different channel resources and hardware cost requirements, four MAC schemes are proposed to improve the multi-hop handoff performance in single-channel single-radio, single-channel multi-radio, multi-channel single-radio, and multi-channel multi-radio WMNs. With the proposed MAC schemes, the inter-gateway handoff performance can be improved significantly in multi-hop WMNs.

Genre

doctoral dissertations

Subjects--Topics

Electrical engineering

Degree

Ph.D.

Keywords

Channel Allocation
Handoff
Medium Access Control
Mobile IP
Mobility Management
Wireless Mesh Networks

Subject Area

Electrical Engineering

Advisor(s)

Xie, Jiang

Committee Members

Nasipuri, Asis
Wang, Yu
Zhang, Zhiyi

Degree Note

Thesis (Ph.D.)--University of North Carolina at Charlotte, 2012.

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Rights Holder Information

Copyright is held by the author unless otherwise indicated.

Identifier

LI_uncc_0694D_10391

Permalink

http://hdl.handle.net/20.500.13093/etd:1557