User-central wireless system: ultimate dynamic channel allocation
Seyed A. Reza Zekavat, Xiukui Li · 2005
This paper introduces a new wireless architecture that creates ultimate freedom for dynamic channel allocation (DCA). The architecture is implemented based on the capabilities of cognitive radios. In the current wireless systems, users should subscribe to a service provider (vendor) and receive the service through the spectrum assigned to that vendor at all times. Hence, we call the current wireless systems as vendor-central systems. Vendor-central systems suffer from low utility performance defined in terms of spectrum efficiency, blocking rate, and revenue. In this work, we introduce a futuristic user-central wireless system configuration. In user-central systems, a user has the freedom of receiving the service through an optimum vendor at any time instance and geographical location. The optimum vendor is selected by an intelligent mobile based on parameters such as the vendor signal power, channel availability, congestion rate, cost per second, and quality of service. Here, vendors form a vendor area network (VAN) controlled by an inter-vendor mobile registration center (MRC). This paper discusses the system's structure, call procedure, and utility performance benefits attained by this system