TDM Signal Aggregation Across Multiple Cards
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Solution Overview
Problem
Conventional techniques fail to accurately packetize and de-packetize Time-Division Multiplexing (TDM) based signals across multiple TDM cards, limiting the ability to aggregate or disaggregate circuit bundles efficiently, as they require all signals to enter and exit on the same TDM card.
Innovation Solution
A system comprising multiple TDM cards and a processor with signal aggregation logic that allows TDM based signals to enter and exit on respective cards, enabling flexible aggregation and disaggregation, and providing redundancy for uninterrupted packet processing through circuit bundle protection mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all TDM signals are required to enter and exit on the same TDM card, then packetization accuracy is maintained, but system flexibility and adaptability are reduced
Solution Approach 1:
The system divides the TDM signal processing function across multiple TDM cards, with each card capable of independently handling specific signals. The aggregation process is segmented and distributed across different cards rather than centralized on a single card, allowing signals to enter and exit on respective cards while maintaining processing accuracy through the coordination mechanism.
Solution Approach 2:
Each TDM card is designed with universal capabilities to handle both packetization and aggregation functions. The cards can operate independently or in combination with others, allowing any TDM card to serve multiple purposes including signal input, signal output, and aggregation participation, thereby eliminating the restriction that all signals must use the same card.
2Device complexity
If circuit bundles are restricted to a single TDM port, then signal processing simplicity is maintained, but bandwidth utilization and productivity are limited
Solution Approach 1:
The system transitions from a single-dimension approach (one TDM port per circuit bundle) to a multi-dimensional approach where circuit bundles can span multiple TDM cards and ports. This dimensional expansion allows signals to be distributed across different physical paths while the aggregation process consolidates them, effectively adding a spatial dimension to the signal routing capability.
Solution Approach 2:
Multiple TDM signals from different cards and ports are merged through the aggregation process into a unified output. The aggregation function combines signals from various sources (different TDM cards, different ports) into a consolidated stream, enabling circuit bundles to utilize multiple physical paths while presenting a single logical interface for packet processing.
3Reliability
If redundancy mechanisms are implemented across multiple TDM cards, then system reliability is improved, but device complexity increases
Solution Approach 1:
The system implements protection mechanisms by pre-configuring alternative signal paths across multiple TDM cards. When a primary signal path or card fails, the system can switch to pre-established backup paths without interrupting service. This beforehand cushioning approach ensures reliability by preparing redundancy in advance rather than reacting to failures.
Solution Approach 2:
The aggregation process acts as an intermediary layer that manages the complexity of multi-card redundancy. Rather than requiring direct complex interconnections between all cards, the aggregation function mediates signal flow, coordinating the interaction between multiple TDM cards and simplifying the overall system architecture while enabling reliable failover capabilities.
Data Source
AI summary
Techniques are described herein for efficient processing of Time-Division Multiplexing (TDM) based signals. In one example embodiment, a system includes a first TDM card, a second TDM card, and a processor in communication with the first TDM card and the second TDM card. The second TDM card hosts an aggregation process configured to aggregate a first TDM based signal and a second TDM based signal into a combined TDM based signal. The processor is configured to obtain a packetized version of the first TDM based signal from the first TDM card and provide the packetized version of the first TDM based signal to the second TDM card. The processor is further configured to prompt one or more packet cards to output packets based on the combined TDM based signal.