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In this paper, we present a collision avoidance method for Multi-AP Wi-Fi broadcasting systems. Whereas the existing studies consider single AP based Wi-Fi broadcasting systems, our study focuses on Multi-AP systems which can cover much wider area. We identify and describe a packet collision problem, specific to Multi-AP systems, caused by simultaneous transmission. Two collision scenarios are found...
Station association information, such as an associated mesh router is required to support communication between legacy stations in Wireless Mesh Networks (WMN). Current IEEE 802.11s draft standard specifies two mechanisms to maintain the station association information: Proxy Registration Procedure (PRP) and Association Discovery Protocol (ADP). Each of them has structural limitations in that mesh...
In recent years, the demand for real-time multi-media service in WLAN environment rapidly increases due to the Wi-Fi smart phone user growth. In order to transmit real-time multimedia to many users, broadcast transmission is more efficient than unicast transmission. However, broadcast transmission without retransmissions leads to the higher loss rate in real wireless environments. In this paper, we...
In this paper, we present a WLAN-based automatic vehicle identification (AVI) technique. AVI, typically used for electronic toll collection, is a basic functional requirement for a smart car. The development of this technique is a subtask of building a WLAN-based multi-purpose vehicular terminal device providing various functions, such as AVI, car-to-car communication and vehicular Internet access...
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