Prioritized Channel Scanning for DOCSIS 3.0 Reconnection
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Solution Overview
Problem
Cable modem termination systems (CMTS) often connect DOCSIS 3.0 devices to legacy channels due to network infrastructure limitations, leading to suboptimal performance as they typically prefer DOCSIS 3.0 channels, which are not immediately utilized.
Innovation Solution
Implementing prioritized channel scanning in Customer Premise Equipment (CPE) devices to prefer DOCSIS 3.0 channels over legacy channels by storing them in a nonvolatile data store, ensuring they reconnect to DOCSIS 3.0 channels upon initialization or reset before attempting connections to legacy channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CMTS connects DOCSIS 3.0 devices to legacy channels due to network infrastructure limitations, then device connectivity is maintained, but service quality and network performance deteriorate
Solution Approach 1:
The CPE device performs preliminary action by storing preferred DOCSIS 3.0 channel information in non-volatile memory before network reconnection is needed. When reconnection is required, the device retrieves and attempts to reconnect to the stored DOCSIS 3.0 channel first, before falling back to legacy channels, thus proactively ensuring optimal connection rather than reactively seeking it
2Device complexity
If CPE devices scan channels in traditional order, then scanning process is simple, but connection speed and reliability to optimal channels deteriorate
Solution Approach 1:
The device performs preliminary action by pre-storing preferred DOCSIS 3.0 channel information in non-volatile memory before actual connection attempts. This preliminary storage of channel preference information eliminates the need for complex real-time channel analysis during connection, thereby maintaining simple scanning logic while achieving faster connection to optimal channels
Solution Approach 2:
The invention applies local quality by treating DOCSIS 3.0 channels differently from legacy channels in the scanning process. The CPE device assigns higher priority and different scanning behavior to DOCSIS 3.0 channels versus legacy channels, making the scanning process adaptive to channel type rather than uniform, thus improving connection speed to optimal channels without significantly increasing overall complexity
3Speed
If CPE devices store previously used channels in nonvolatile data store, then reconnection speed improves, but preference for legacy channels over DOCSIS 3.0 channels persists
Solution Approach 1:
The invention applies local quality by differentiating the treatment of channel types within the stored channel list. The CPE device identifies which stored channels are DOCSIS 3.0 channels and which are legacy channels, then applies different scanning priorities to each type. This allows the device to maintain fast reconnection to previously used channels while ensuring that DOCSIS 3.0 channels are attempted first, thus improving both speed and service quality simultaneously
Data Source
AI summary
Methods, systems, and apparatus can be used to prioritize channel scanning. In various implementations, a nonvolatile memory on a CPE device can store downstream channels that a CPE device previously identified as being used by a headend. In some implementations, the nonvolatile memory can be organized or arranged such that DOCSIS 3.0 channels receive preference upon initialization. In other implementations, the selection of the channels from nonvolatile memory can be prioritized to select DOCSIS 3.0 channels over other types of channels.