Channel Assignment and Performance Evaluation of directional Multi-Channel Wireless Mesh Networks
Date Issued
2005
Date
2005
Author(s)
Hsu, Kun-Jin
DOI
zh-TW
Abstract
IEEE provides non-overlapping channels for multiple transmissions to transmit at the same time. But most IEEE 802.11-based networks today use only a single channel. As a result, these networks can’t exploit the peak performance because of packet collision and interference. In this thesis, we study the interference problems including hidden terminal problem and exposed terminal problem in wireless mesh networks. We proposed a new architecture of directional multi-channel wireless mesh networks and TwoHop channel assignment algorithm. Compared to the single-channel network, we only revise the systematic procedure to support the multi-channel transmission with multiple network interface cards to transmit at the same time. Using our channel assignment algorithm to assign channels on links can lower the interference problems in wireless LANs and improve the network overall received goodput. We verify the performance improvement of the proposed algorithm through ns2. From the result, our approaches indeed improve the network performance and the success rate of the long route packets.
Subjects
IEEE 802.11 WLAN
多頻道傳輸
無線頻道指派法
方向性傳輸
multi-channel transmission
channel assignment algorithm
directional transmission mechanism
Type
other
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