Multiterminal communication system and method

Details Multiterminal communication system and method Multiterminal communication system and method

H - Electricity

04

J

340/90

H04J 3/16 (2006.01) H04L 12/28 (2006.01) H04Q 7/22 (2006.01)

Patent

CA 1340498

The present invention relates to a communication system suitable for the communication of data between a plurality of secondary units and a primary unit, and in a presently preferred implementation relates to improvements in radio data communication systems wherein mobile terminals transmit data to a primary processor under a wide range of operating conditions. The primary processor may transmit a multiterminal polling signal defining a series of successive response time slots which the terminals may randomly select. A terminal wishing to send a message transmits a brief response burst in the selected time slot giving its identification. The primary processor may them sequentially poll specific individual terminals having messages to send. The primary processor may maintain a record of currently active terminals and/or of collisions (where more that one terminal seeks to transmit in the same response time slot), and as needed may automatically send e.g. with its multiterminal poll, a time slot number change, creating a greater or lesser number of time slots for future use by the active terminals. The system is thus highly adaptable on a dynamic basis during operation so as to readily maintain optimum throughput under changing conditions. As a consequence, additional terminals may become active simply by transmitting their respective identifications in randomly selected response time slots.

615451

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