PACKET BROADCASTING METHOD IN RF SYSTEM

摘要

PURPOSE: To provide an RF communication system including a control module which communicates with plural user modules connected to at least one user device. CONSTITUTION: A system provides a packet communication means which transmits a conventional incoming address packet to a designated objective point 24 or user module UM 20 and uses a broadcast protocol to simultaneously broadcast information destined for plural UMs 20 to all UMs 20. The possibility that each UM 20 receives a broadcast packet is improved by transmitting each broadcast packet from a control module through at least several directional antennas, preferably, transmitting it on each antenna plural times repeatedly. A packet of data longer than a prescribed byte length is divided into packet fragments.