Selective Broadcast Interconnection (sbi) For Wideband Fiber-Optic Local Area Networks

Yitzhak Birk; Michel E. Marhic; Fouad A. Tobagi

doi:10.1117/12.966543

6 July 1986 Selective Broadcast Interconnection (sbi) For Wideband Fiber-Optic Local Area Networks

Yitzhak Birk, Michel E. Marhic, Fouad A. Tobagi

Proceedings Volume 0585, Fiber Optic Broadband Networks; (1986) https://doi.org/10.1117/12.966543
Event: 1985 International Technical Symposium/Europe, 1985, Cannes, France

Abstract

The selective broadcast interconnection (SBI) is a scheme for directly interconnecting transmitting stations, each equipped with CT transmitters, and receiving stations, each equipped with CR receivers, such that each transmitting station is always connected to all receiving stations through passive communication channels with no intermediate switches. S BI consists of CT CR separate broadcast subnetworks, each of which interconnects a subset of transmitting stations and a subset of receiving stations, such that each transmitting station and receiving station are interconnected through a single subnetwork. Each subnetwork is shared by its transmitting members via some multiple-access scheme. Comparing S B I with CT=CR=C with the use of C broadcast buses, each connecting all transmitting stations to all receiving stations, one finds that in some cases, including that of equal single-destination traffic requirements for all source-destination pairs, the aggregate throughput with S B I can be higher by a factor of C, while the stations' hardware is the same. For nonuniform traffic requirements, however, the maximum aggregate throughput with S B 1 can be C times lower (in extreme situations). For fiber-optic implementations employing a central wiring closet, the two schemes require the same amount of fiber and, if the same elementary couplers are used to construct the required star couplers, SBI requires fewer couplers. Clearly, the same number of couplers and up to C times more fibers may be required for S B I in a linear-bus implementation. In all cases, transmitter power need only reach N/C receivers with S B I (instead of N with C parallel buses); this allows to accommodate a larger number of stations when implementing the interconnection with passive components.

Citation Download Citation

Yitzhak Birk, Michel E. Marhic, and Fouad A. Tobagi "Selective Broadcast Interconnection (sbi) For Wideband Fiber-Optic Local Area Networks", Proc. SPIE 0585, Fiber Optic Broadband Networks, (6 July 1986); https://doi.org/10.1117/12.966543

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