Patent
1974-12-30
1977-02-22
Robinson, Thomas A.
325 4, H04J 300
Patent
active
040093441
ABSTRACT:
Digital exchange terminals are linked by earth satellite in a privately coordinatable time division switching and communication network system serving multiple voice telephone and data communication lines. Terminals operate in each satellite time division frame to pass information switchably between variously paired lines and groups of n buffer stores, and between up to m (less than n) stores of each group (addressed in predetermined time order as internal time division channels termed virtual channels) and associated time-ordered groups of up to m external (satellite) channels. The selective switching between internal and external channels is termed activity compression handling. The external channels are adaptively appropriated to the terminals by demand assignment. Demand information exchanged between terminals at all network nodes is processed through a predetermined and pretimed reassignment computation process executed at all terminals. The terminals then exchange information representing proposed (bid) reassignments of external channels. In the absence of conflict the bid assignments are instituted. The activity compresssion acts as an intrinsic limiting factor on demand when more than m virtual channels are occupied.
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International Business Machines - Corporation
Lieber Robert
Robinson Thomas A.
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