The introduction of optical fibers in local area networks makes it possible to implement wide-band communication systems integrating all the communication services (telephone, data, images, etc.) foreseen in future office scenarios. This paper describes a reconfigurable high-speed local communication system, which is currently under development at the Centro Studi e Laboratori Telecomunicazioni (CSELT), conceived to attain high reliability and efficiency features, therefore suitable for a wide range of application environments, such as automated offices, integrated manufacturing, hospitals, etc. The access organization is based on a hybrid (i.e., circuit and packet) protocol, which guarantees each type of traffic the required grade of service, while allowing an optimal exploitation of the transmission capacity. Fault-tolerance issues are taken as a guideline in the overall system conception and, in particular, in the transmission subsystem design. The transmission subsystem presently uses available optical technology to implement a loop-shaped bus topology capable of reconfiguring by means of a distributed algorithms, when a link or node fails.
[1]
Peter A. Franaszek,et al.
A DC-Balanced, Partitioned-Block, 8B/10B Transmission Code
,
1983,
IBM J. Res. Dev..
[2]
J. E. Fouquet,et al.
A fail-safe node for lightguide digital networks
,
1981
.
[3]
I. Watson.
The integrated services local network
,
1984
.
[4]
L. D. J. Eggermont,et al.
Design Approaches and Performance Criteria for Integrated Voice/Data Switching
,
1977
.
[5]
A. Moncalvo,et al.
Perspectives on Wideband Local Area Communication Networks
,
1984,
ICC.
[6]
Katsuo Ikeda,et al.
GAMMA-NET: A Local Computer Network Coupled by a High Speed Optical Fiber Ring Bus -System Concept and Structure
,
1983,
Comput. Networks.