Patent ID: 6614838
Filing Date: 2003-09-02
Classification: H04L

Abstract:
A communication system, comprising:a master transceiver; a communication medium; a plurality of tributary transceivers in communication with said master transceiver over said communication medium, a first one of said tributary transceivers using a primary modulation method for communication over said communication medium and a second one of said tributary transceivers using a secondary modulation method for communication over said communication medium; said master transceiver including a processor and a storage medium in communication with said processor, said storage medium having program code for exchanging information over said communication medium, said program code comprising: first logic configured to establish said primary modulation method for communication over said communication medium; second logic configured to transmit a training sequence to notify said first one of said tributary transceivers of a change from said primary modulation method to said secondary modulation method; third logic configured to transmit information to and receive information from said second one of said tributary transceivers using said secondary modulation method; fourth logic configured to transmit a trailing sequence using said primary modulation method to notify said first one of said tributary transceivers of a change from said secondary modulation method to said primary modulation method; and fifth logic configured to transmit information to and receive information from said first one of said tributary transceivers using said primary modulation method; said first one of said tributary transceivers including a processor and a storage medium in communication with said processor, said storage medium having program code for exchanging information over said communication medium, said program code comprising: sixth logic configured to detect a change from said primary modulation method to said secondary modulation method; seventh logic configured to ignore transmissions on said communication medium using said secondary modulation method; and eighth logic configured to detect a trailing sequence transmitted using said primary modulation method after detecting a change from said primary modulation method to said secondary modulation method; said second one of said tributary transceivers including a processor and a storage medium in communication with said processor, said storage medium having program code for exchanging information over said communication medium, said program code comprising: ninth logic configured to receive information transmitted using said secondary modulation method; and tenth logic configured to ignore transmissions on said communication medium using said primary modulation method.