CMTS Receiver Integrity Assessment for Load Balancing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Cable Modem Termination Systems (CMTS) face issues with load balancing when receivers are impaired, leading to repeated modem registration and deregistration, as the load balancing manager moves modems to impaired receivers, causing instability and requiring manual intervention or configuration settings that do not effectively address the issue.
Innovation Solution
Implementing a receiver integrity program that assesses the signal quality of each receiver, identifies impaired channels, and attempts to repair them, notifying the load balancing manager to avoid using impaired receivers, thereby ensuring stable and efficient traffic balancing across multiple ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If load balancing manager moves modems to all available receivers, then bandwidth utilization is improved, but system stability deteriorates when impaired receivers are present
Solution Approach 1:
The system performs preliminary integrity assessment of receivers before assigning modems to them. The load balancing manager checks receiver status and signal quality measurements in advance, identifying impaired receivers before modem assignment occurs. This preliminary action prevents modems from being assigned to impaired receivers, thereby maintaining system stability while still achieving bandwidth utilization through assignment to healthy receivers.
Solution Approach 2:
The system implements a feedback mechanism where integrity assessment results are continuously monitored and fed back to the load balancing manager. When receivers are assessed as impaired, this information is fed back to prevent their use in load balancing. The feedback loop ensures that only receivers meeting integrity thresholds are included in load balancing groups, resolving the contradiction between utilization and stability.
2Reliability
If receiver integrity assessment is implemented, then system reliability is improved, but device complexity increases
Solution Approach 1:
The load balancing manager performs integrity assessment itself by obtaining signal quality measurements from receivers and evaluating them against thresholds. Rather than adding separate assessment hardware or complex external systems, the existing load balancing manager executes the assessment logic, using available measurement data to determine receiver integrity. This self-service approach improves reliability without significantly increasing device complexity.
Data Source
AI summary
A method and computing device for assessing the integrity of receivers in a Cable Modem Termination System (CMTS) to improve load balancing. The method configures a load balancing manager to move registered modems between the receivers, where each receiver is tuned to a frequency. The method obtains a signal quality measurement for each receiver, and, for each receiver, evaluates the signal quality measurement, and identifies the receiver as an impaired receiver when the frequency to which the receiver is tuned is identified by the evaluating as an impaired frequency. The method attempts to repair each impaired receiver, and notifies the load balancing manager to not allow moving the registered modems to each impaired receiver that is not repairable, and to allow moving the registered modems to each receiver that transitions from impaired to unimpaired.