Dynamic TDD Frame Partitioning for Multi-Line Communication Systems
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Solution Overview
Problem
Current time division duplex (TDD) communication systems face limitations in flexibility and energy efficiency, particularly in multi-line environments with crosstalk, as they require synchronous switching of upstream and downstream sections, which is impractical due to varying service requirements across lines.
Innovation Solution
A method that monitors data rates on multiple lines to dynamically determine the partition of TDD transmission frames, allowing for discontinuous operation and flexible adjustment of the upstream and downstream sections, enabling efficient power management and high data rate allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If synchronous switching of US/DS sections is implemented in all lines to mitigate NEXT, then crosstalk reduction is achieved, but flexibility in service assignment is lost
Solution Approach 1:
The system segments the TDD transmission frame into multiple partitions, each with different US/DS time ratios. Lines are grouped into different segments (partitions) based on their service requirements. This allows each line segment to have optimized US/DS allocation while maintaining synchronous switching within each partition to mitigate NEXT.
Solution Approach 2:
The system dynamically assigns lines to different TDD partition configurations based on real-time service requirements. The partition assignment can change over time, allowing the system to adapt to varying traffic patterns while maintaining the benefits of synchronous switching within each active partition.
2Object-affected harmful factors
If fixed ratio of US section and DS section durations is used, then NEXT mitigation is achieved, but flexibility for high US or DS throughput is limited
Solution Approach 1:
Multiple TDD partition configurations are defined, each with different US/DS time ratios optimized for different service types. Lines requiring high US throughput are assigned to partitions with larger US sections, while lines requiring high DS throughput are assigned to partitions with larger DS sections.
Solution Approach 2:
Each line receives a TDD partition configuration tailored to its specific service requirements and traffic pattern. This local optimization allows each line to achieve maximum throughput for its intended service while the overall system maintains NEXT mitigation through coordinated partition switching.
3Use of energy by moving object
If discontinuous operation is implemented to reduce energy consumption, then power efficiency is improved, but coordination complexity for crosstalk cancellation increases
Solution Approach 1:
The system dynamically adjusts the discontinuous operation pattern for each line based on its traffic requirements and partition assignment. Lines in partitions with asymmetric US/DS ratios can discontinue transmission during the shorter direction's time slots, reducing energy consumption while the centralized coordination manages crosstalk cancellation.
Solution Approach 2:
The system uses feedback from traffic monitoring and performance measurement to optimize discontinuous operation patterns. The coordination entity receives information about actual traffic patterns and adjusts partition assignments and DO parameters to balance energy savings with crosstalk management requirements.
Data Source
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AI summary
Data communication is monitored on a plurality of lines to establish an operational characteristic of the data communication on the plurality of lines. Based on the operational characteristic: a partition (581-583) of at least one TDD transmission frame (501-503) of the data communication is determined, the partition comprising an US section (572) and a DS section (571) and enabling DO of the data communication. One or more modems (101-104) of the plurality of lines (112-114) are controlled to implement the partition (580-583) for the at least one transmission frame (501-503)