The Effect of Carrier Sense Range and Frame Size on IEEE 802.11 Based Multi-hop Networks

• Main Authors: Hsin-Chi Wang, 王信棋
• Other Authors: Ting-Chao Hou
• Format: Others
• Language: en_US
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/94097916747338627813

碩士 === 國立中正大學 === 電機工程研究所 === 90 === In recent years there has been an increasing trend toward wireless communications. Wireless communication networks are gaining special interest as they provide flexibility and convenience. Much research has focused on one kind of multi-hop ad hoc wireless networks where there is no stationary infrastructure, such as a base station, and nodes communicate with each other through other mobile nodes. It may work together with the existing mobile cellular system to extend the communication coverage. In a wireless environment, there are the inherent fading and interference problems. The hidden node problem is a unique interference phenomenon in wireless multi-hop networks. IEEE 802.11 is a wireless LAN standard which defines a DCF mechanism that may be used in a multi-hop networks. This thesis work analyzes the throughput of a wireless multi-hop network when the IEEE 802.11 DCF mechanism is used as the MAC access scheme. We discuss the hidden node problem and the exposed node problem when different carrier sense ranges and packet sizes are adopted in a multi-hop WLAN.