Dynamic EQAM Discovery in M-CMTS via Routing Protocol
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Modular Cable Modem Termination Systems (M-CMTS) face challenges in dynamically discovering and re-establishing communication with Edge Quadrature Amplitude Modulation (EQAM) devices due to changes in IP addresses or parameters, requiring manual provisioning and lacking automated recovery mechanisms.
Innovation Solution
Extending existing routing protocols, such as Open Shortest Path First (OSPF), to enable EQAM information exchange between M-CMTS core and EQAM through in-band routing messages, allowing dynamic discovery and tunnel establishment without relying on static provisioning or additional devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual provisioning of EQAM parameters is used, then initial tunnel setup is possible, but the system cannot dynamically adapt to IP address changes or parameter modifications
Solution Approach 1:
The M-CMTS core automatically discovers EQAM parameters by receiving routing messages from EQAM devices without human intervention. The system self-configures tunnels based on dynamically received EQAM IP addresses and parameters, eliminating the need for manual provisioning and enabling automatic adaptation to changes.
Solution Approach 2:
EQAM devices continuously advertise their parameters and IP addresses through routing messages to the M-CMTS core. This feedback mechanism allows the core to monitor EQAM status, detect changes, and dynamically update tunnel configurations to maintain communication resilience.
2Reliability
If static provisioning is used, then initial configuration is simple, but communication cannot be maintained when IP addresses change
Solution Approach 1:
The patent leverages existing routing protocol infrastructure already present in the network to perform dual functions: traditional routing and EQAM parameter advertisement. This universal use of routing messages avoids adding complex dedicated discovery protocols while maintaining communication resilience.
Solution Approach 2:
The patent uses existing network routing infrastructure as an intermediary to transport EQAM discovery information. Rather than implementing direct peer-to-peer discovery between M-CMTS core and EQAM devices, routing messages serve as intermediaries to convey parameter information reliably even during IP changes.
3Extent of automation
If additional devices or protocols are added for EQAM discovery, then dynamic discovery capability is achieved, but system complexity and cost increase
Solution Approach 1:
The patent makes existing routing protocols multi-functional by having them carry both traditional routing information and EQAM parameter advertisement. This eliminates the need for separate discovery devices or protocols, achieving automated discovery using already-deployed network infrastructure.
Data Source
AI summary
In one example, an Edge Quadrature Amplitude Modulation (EQAM) communicates EQAM information to a Modular Cable Modem Termination System (M-CMTS) core using a routing protocol that is configured on a packet switched network coupling the EQAM to the M-CMTS core. The EQAM generates a routing message according to the routing protocol and inserts EQAM information, such as a description of a modulated channel extending from the EQAM, the service-group information, etc., into the routing message. The EQAM then floods the EQAM information over at least portions of a routing domain by transmitting the routing message to an adjacent intermediary device.