Broadband multirate switching architecture

Details Broadband multirate switching architecture Broadband multirate switching architecture

1989-11-27

1991-03-12

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 581, 370 59, 370 681, 370 8515, H04J 316

Patent

active

049998323

ABSTRACT:
A broadband ISDN communication system (10) comprises a plurality of bit-serial synchronous time-division multiplexed ring networks (15) interconnected by a circuit switch (11). In each network, terminal equipment (14) is interfaced to a fiber-optic ring bus (12) by add/drop multiplexers (13). Single time slots (201) on the ring function as independently-assignable channels. Each time slot carries one bit at an 8 Kbps rate. Ring bandwidth is 45 Mbps. The circuit switch is a time-division multiplexed time-space switch. The time stage (301) comprises a plurality of time slot interchangers (TSI 303), one for each switch output port (306). Each TSI unit is connected to all switch input ports (305) and through the space stage to its corresponding output port. The space stage (302) is a time-multiplexed space stage. The switch is fully non-blocking and has broadcast capability. System bandwidth is dynamically allocated to users in single time slot (8 Kbps) increments, under control of a network manager (16).

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D. L. Carney et al., "The 5ESS Switching System: Architectural Overview", AT&T Technical Journal, vol. 64, No. 6 (Jul.-Aug. 85), pp. 1339-1357.

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