Spectrum Management and Timing Optimization for Multi-DP Communication Networks
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Solution Overview
Problem
Current communication systems face limitations in increasing bandwidth due to crosstalk between lines sharing a binder and communication collisions between upstream and downstream transmissions, which hinder the provision of new services like IPTV and cloud computing.
Innovation Solution
A system-wide coordination method using a central optimizer to manage spectrum and allocate transmit and receive time slots among distribution points, creating a common clock and estimating communication delays to align symbol timing and prevent collisions, combined with local crosstalk cancellation techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If crosstalk cancellation techniques are applied within a single distribution point, then bandwidth is increased for channels within that DP, but system-wide bandwidth is limited due to crosstalk between lines in different DPs
Solution Approach 1:
The patent merges crosstalk cancellation operations across multiple distribution points by having the CO coordinate spectrum management and timing optimization for all DPs sharing a binder. This combines previously isolated single-DP techniques into a system-wide solution, enabling bandwidth improvement across the entire multi-DP system rather than limiting gains to individual DPs.
Solution Approach 2:
The central office acts as an intermediary that receives binder information from multiple DPs, performs centralized spectrum management and timing optimization calculations, then distributes coordinated control parameters back to the DPs. This mediator approach enables system-wide coordination without requiring direct peer-to-peer communication between DPs.
2Productivity
If spectrum management and timing optimization are coordinated system-wide across multiple DPs, then system bandwidth is significantly enhanced, but system complexity and coordination requirements increase
Solution Approach 1:
The patent segments the complex system-wide optimization problem into manageable components: (1) spectrum management for frequency allocation, (2) timing optimization for transmission synchronization, and (3) binder information collection from individual DPs. This segmentation allows the CO to handle different aspects of coordination separately while achieving overall system-wide bandwidth enhancement.
3Productivity
If upstream and downstream transmissions share the same physical link simultaneously, then communication efficiency is improved, but communication collisions occur reducing effective bandwidth
Solution Approach 1:
The patent implements dynamic timing adjustment where transmission timing parameters are continuously optimized based on measured channel conditions and collision patterns. The system dynamically modifies upstream and downstream transmission schedules to prevent collisions while maintaining high communication efficiency, rather than using fixed static timing allocations.
4Adaptability or versatility
If more bandwidth is allocated to support new services like IPTV and cloud computing, then service capability is enhanced, but crosstalk and collisions increase reducing effective usable bandwidth
Solution Approach 1:
The patent changes key transmission parameters including frequency allocation, power levels, and timing offsets to optimize performance for multiple services simultaneously. By adjusting these parameters across the system, the CO enables support for bandwidth-intensive services like IPTV and cloud computing while maintaining effective usable bandwidth through coordinated crosstalk cancellation and collision avoidance.
Data Source
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AI summary
Presented are systems and methods for spectrum management and timing optimization of communication networks have multiple distribution points, multiple remote transceivers, and a shared communication binder. In some embodiments, distribution points and communication lines are added to an active network by the allocation of unused time slots. In some embodiments, transmission collisions, near-end cross-talk, and far-end cross-talk, are predicted upon the addition of added distribution points and communication lines, and techniques are applied to reduce or cancel such phenomena.