UniNet: a hybrid approach for universal broadband access using small radio cells interconnected by free-space optical links

Abstract

Abstract-A new type of broadband access system is proposed for providing high-quality, bandwidth-upon-demand telecommunication services to the home and office. Communication terminals attach to the network via short radio links, and users can roam freely within a house or building unencumbered by the availability of wired "telecommunications outlets." Basic service is extended through small, high-capacity radio cells; the base stations are interconnected via short, highly focused free-space optical links in a multihop mesh arrangement; and the need for new broadband access cabling is totally surmounted. A tiered arrangement of radio cells further extends service to both out-ofbuilding pedestrian and vehicular users, and service is universally available.Benefits of the approach are described, and issues involving reliability, availability, capacity, and hand off are identified and addressed. Opportunities to refine the basic approach are suggested for further study.Index Terms-Broadband networks, local access, wireless communications.

Cost-Efficient Wireless Mobile Backhaul Topologies: An Analytical Study

“…installing primary wireless links. Constraint (2) assures that the flow traffic cannot exceed the edge capacity. Constraints (3) and (4) define that, given a topology, the overall flow traffic passing through the gateways equals the overall traffic demand, i.e.…”

“…On the other hand, using emerging wireless technologies, e.g. pointto-point microwave or free space optics (FSO), for backhauling has been studied in recent literature [2], [3], [4]. They are now capable of transmitting more than 1.25 Gb/s, and can bridge long distances between a gateway and a base station 1 .…”

To Study the Effect of BER and Q-factor in Intersatellite Optical Wireless Communication System

“…There are three important parameters: transmitter power, propagation losses, and receiver sensitivity. The receiver sensitivity relates the amount of optical power needed to maintain the signal to noise ratio required to achieve a desired quantity of service (5). This paper shows the effect of Q-factor on BER and also analyzes the dependency of received power on antenna diameter (4).…”