Distributed CMTS Upstream Channel Bandwidth Sharing

The patent segments the CMTS functionality into distributed nodes along the cable network, allowing upstream channels to be divided into multiple time slots that can be shared by multiple cable modems. This segmentation enables efficient bandwidth utilization without requiring fiber to every household, resolving the contradiction between achieving high bandwidth capacity and the cost of deployment.

The patent implements periodic time-division multiplexing where upstream channels are divided into sequential time slots. Multiple cable modems share the same physical upstream channel by transmitting in different time periods, thereby achieving high bandwidth capacity through periodic access patterns without the need for expensive fiber infrastructure at each premises.

The patent employs feedback mechanisms where the CMTS node receives timing information from cable modems and adjusts the allocation of time slots accordingly. This feedback loop enables efficient bandwidth utilization by dynamically assigning time slots based on actual transmission needs, while the standardized feedback protocol prevents timing coordination from becoming unmanageably complex.

The patent changes the parameter of time allocation by dividing the upstream channel into variable-length time slots assigned to different cable modems. This parameter transformation allows multiple modems to share the channel efficiently while maintaining simple timing coordination through standardized timing references and slot assignments, resolving the contradiction between bandwidth utilization and coordination complexity.