A Distributed Cooperative MAC Protocol for QoS Improvement and Mobility Support in WiMedia Networks

Authors:
Jin-Woo Kim;Kyeong Hur;Jangwoo Kwon
Affiliations:
Research Institute of Information Science and Engineering, Mokpo National University, Mokpo, Korea 534-729;Department of Computer Education, Gyeongin National University of Education, Gyeyang-Gu, Incheon, Korea 407-753;Department of Computer and Information Engineering, INHA University, Nam-gu, Incheon, Korea 402-751
Venue:
Wireless Personal Communications: An International Journal
Year:
2013

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Abstract

A Distributed Medium Access Control (D-MAC) protocol based on UWB for high-rate Wireless Personal Area Networks is specified by the WiMedia Alliance. D-MAC protocol is suitable for ubiquitous connection in home networks, military/medical applications due to its inexpensive cost, low power consumption, high data rate, and distributed approach. In contrast to IEEE 802.15.3, D-MAC makes all devices have the same functionality. And its networks are self-organized and provide devices with functions such as access to the medium, channel allocation to devices, data transmission, quality of service and synchronization in a distributed manner. D-MAC fundamentally removes the problems of the centralized MAC approach revealed at IEEE 802.15.3 MAC by adopting a distributed architecture. However, the current D-MAC can't prevent QoS degradations, occurred by mobile nodes with low data rate due to bad channel status, which cause critical problems in QoS provisioning to isochronous streams and mobile applications. Therefore, we propose a distributed cooperative MAC protocol for multi-hop WiMedia networks using virtual MIMO links. Based on instantaneous Channel State Information among WiMedia devices, our proposed protocol can intelligently select the transmission path with higher data rate to provide advanced QoS with minimum delay for real-time multimedia streaming services.