Deadline Probing: Towards Timely Cognitive Wireless Network

Authors:
Panlong Yang;Guihai Chen;Qihui Wu
Affiliations:
Institute of Communication Engineering, PLAUST Computer Science Department, Nanjing University, Nanjing, China;Institute of Communication Engineering, PLAUST Computer Science Department, Nanjing University, Nanjing, China;Institute of Communication Engineering, PLAUST Computer Science Department, Nanjing University, Nanjing, China
Venue:
NPC '08 Proceedings of the IFIP International Conference on Network and Parallel Computing
Year:
2008

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Abstract

A confidential and effective probing is fundamental to a cooperative and cognitive wireless network. Previous seminar works are not deadline sensitive, and often suffer from highly dynamic multi-channel environments. As they focus more on transmitting packets with the optimal channel, resources are not efficiently used when sufficient channels are available in multi-radio multi-channel systems. Decisions are made without time constraints, while in dynamic wireless environments, deadlines are always presented for both probing and data transmission process. In this paper, we propose a transmission deadline probing paradigm, and an optimal probing and transmission schedule with time constraints is proposed, which is a pure threshold policy. Simulation results show that, deadline probing paradigm effectively improves network resource utilization as multiple channels presented with probing and transmission deadlines.