Coordinated Dynamic Time Assignment Transceivers Crosstalk Reduction
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Solution Overview
Problem
The integration of coordinated dynamic time assignment (cDTA) transceivers with legacy transceivers having a fixed frame format in time-division duplexing (TDD) systems leads to significant near-end crosstalk (NEXT), as legacy transceivers cannot adjust their timeslot timing, hindering the rollout of cDTA technology due to compatibility issues and the burdensome process of replacing existing equipment.
Innovation Solution
Implementing a system where cDTA transceivers dynamically adjust their timeslots while selectively muting timeslots of legacy transceivers to align with cDTA transitions, reducing NEXT by ensuring all transceivers in a binder operate in synchronized directions, thereby avoiding interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cDTA transceivers dynamically adjust their timeslot timing to optimize communication capacity, then communication efficiency is improved, but near-end crosstalk increases due to timing misalignment with legacy transceivers
Solution Approach 1:
The patent implements dynamic timeslot assignment where cDTA transceivers can adjust their upstream and downstream timeslot timing based on traffic conditions. The system dynamically determines optimal timeslot configurations and coordinates these changes across multiple transceivers to maintain synchronization and minimize crosstalk while maximizing communication capacity.
Solution Approach 2:
The system changes the timing parameters of timeslots dynamically. By adjusting the position and duration of upstream and downstream timeslots based on measured crosstalk levels and traffic demands, the system optimizes communication efficiency while maintaining acceptable signal quality through parameter adaptation.
2Reliability
If legacy transceivers with fixed frame format are used, then device compatibility is maintained, but communication capacity cannot be optimized due to inability to adjust timeslot timing
Solution Approach 1:
The patent creates a universal system that supports both legacy transceivers with fixed frame formats and cDTA transceivers with dynamic time assignment. The coordination mechanism enables different transceiver types to operate together in the same binder, allowing the system to maintain backward compatibility while incorporating advanced functionality to optimize communication capacity.
Solution Approach 2:
The system introduces a coordination mechanism that acts as an intermediary between legacy and cDTA transceivers. This coordination layer manages timeslot assignments and timing adjustments, enabling legacy transceivers to operate at optimized capacities without requiring hardware modifications, thus bridging the capability gap between different transceiver types.
3Object-affected harmful factors
If legacy transceivers are replaced with cDTA transceivers to avoid crosstalk issues, then near-end crosstalk is reduced, but deployment cost and complexity increase
Solution Approach 1:
The patent implements partial replacement or gradual deployment of cDTA transceivers within a binder. The coordination mechanism enables cDTA transceivers to operate effectively even when mixed with legacy transceivers, allowing operators to incrementally upgrade infrastructure without requiring complete replacement, thus reducing deployment complexity and cost while still achieving crosstalk reduction benefits.
Data Source
AI summary
A time-division duplexing (TDD) system reduces crosstalk associated with signals communicated by coordinated dynamic time assignment (cDTA) transceivers. In some embodiments, the TDD system has both cDTA transceivers and legacy transceivers. Based on the dynamic allocation of downstream and upstream timeslots for the cDTA transceivers, timeslots for the legacy transceivers are selectively muted in an effort to limit the amount of near-end crosstalk (NEXT) that occurs in the TDD system. Thus, subscriber lines coupled to both cDTA transceivers and legacy transceivers may be bound within the same binder without significantly increasing crosstalk to unacceptable levels.