Patent ID: 6477354
Filing Date: 2002-11-05
Classification: G06F,H03M,H04B,H04H,H04J,H04K,H04L,H04M,H04N,H04W,Y02D

Abstract:
A multi-point to point communication system, comprising:a distribution network between a head end terminal and a plurality of remote units, the head end terminal for downstream transmission of downstream control data and downstream telephony information in a first frequency bandwidth over the distribution network and for receipt of upstream telephony information and upstream control data in a second frequency bandwidth over the distribution network, the head end terminal including: head end multicarrier modem means for modulating at least downstream telephony information on a plurality of orthogonal carriers in a plurality of regions of the first frequency bandwidth and for demodulating at least upstream telephony information modulated on a plurality of orthogonal carriers of a plurality of regions in the second frequency bandwidth, the plurality of orthogonal carriers in each of the regions including a plurality of telephony information channels for transmission of telephony information thereon, each of the regions having at least one control channel associated therewith for transmission of control data; and head end controller means operatively connected to the head end multicarrier modem means for controlling transmission of the downstream telephony information and downstream control data-and for controlling receipt of the upstream control data and upstream telephony information; and a plurality of service unit modem means, each service unit modem means associated with at least one remote unit and operatively connected to the distribution network for upstream transmission of upstream telephony information and upstream control data in one of the plurality of regions of the second frequency bandwidth and for receipt of the downstream control data and downstream telephony information in one of the plurality of regions in the first frequency bandwidth, each service unit modem means including: means for scanning each of the plurality of regions in the first frequency bandwidth and for locking onto the at least one control channel in each of the plurality of regions to detect a unique identifier for each service unit modem means to determine which region of the first frequency bandwidth the service unit modem means is to receive information from the head end terminal within.