×

Hierarchical distributed infrared communication system

  • US 4,809,257 A
  • Filed: 03/26/1986
  • Issued: 02/28/1989
  • Est. Priority Date: 04/02/1985
  • Status: Expired due to Term
First Claim
Patent Images

1. System for interconnecting a plurality of data handling units by infrared signals over a common infrared communication channel, said units including a plurality of stations and associated I/O devices, each said unit comprising at least one infrared transceiver and accessing the common infrared communication channel only in dependence of carrier sense function, characterized in thateach said transceiver is assigned to one of a plurality of hierarchical categories according to its required distance range of coverage within said system, and each transceiver includes means for establishing its infrared transmitting power and/or receiving sensitivity at magnitude(s) uniquely corresponding to its hierarchical category.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×