Variable-band distributed switching node with dynamic hybrid-fra

Details Variable-band distributed switching node with dynamic hybrid-fra Variable-band distributed switching node with dynamic hybrid-fra

1984-08-06

1986-09-09

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 67, H04Q 1104

Patent

active

046113215

ABSTRACT:
A variable-band distributed switching node comprises a plurality of independent modules (MU.sub.1 . . . MGm) inserted between subscriber or trunk lines and a common bus (1). Each module includes an input/output portion (IU, HL, SL, PL), processing line information, and an interface (IB) toward the bus which co-operates with the interfaces of the other modules to form hybrid frames on the bus. These frames are each divided into a first region RC, encompassing a plurality of channels assigned to circuit-switched communications, and a residual-band second portion RP shared by packet-switched communications. Such frames are dynamically managed by assigning to each circuit-switched channel a band which can differ in consecutive frames to satisfy the requirements of variable-band sources and by recompacting the channels remaining in region RC after each channel release.

REFERENCES:
patent: 4154983 (1979-05-01), Pedersen
patent: 4446555 (1984-05-01), DeVault et al.
patent: 4482999 (1984-11-01), Janson et al.
"A Distributed Processing Architecture for Voice/Data Switching", by Ross et al., Naecon 1981, Proceedings of the IEEE 1981, National Aerospace & Electronics Conf., Dayton Ohio (19-21 May 1981).
Engineering Aspects of Tasi by K. Bullington et al --pp. 353-365, The Bell System Technical Journal, Mar. 1959.
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"Design Approaches and Performance Criteria for Integrated Voice/Data Switching", Proceedings of the IEEE, vol. 65, No. 8, Sep. 1977, p. 1283 ff.
"An Architecture for a Flexible Integrated Voice/Data Switch", by M. J. Ross et al., presented at the International Conference on Communication, Seattle, 8-12, Jun. 1980.
"Asynchronous Time Division Switching: A New Concept for ISDN Nodes", presented at ISS' 81, (Montreal, 21-25 Sep. 1981.

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