Half-Duplex Communications Device With TDM Schedule
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Solution Overview
Problem
Current network technologies are inefficient in power and cost utilization, particularly in in-vehicle networks with limited resources, where typical methods fail to provide suitable power and cost efficiency for communications networks.
Innovation Solution
The method involves determining a half-duplex communications mode by disabling the echo canceller and implementing a time-division multiplex (TDM) communications schedule over a point-to-point link, which specifies non-overlapping transmission time slots and a silent period for echo fade-out, allowing data transmission without echo cancellation, and switching to full-duplex mode with echo cancellation for simultaneous bidirectional transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex communication with echo cancellation is used, then simultaneous bidirectional transmission is enabled, but power consumption increases
Solution Approach 1:
The system dynamically switches between full-duplex and half-duplex communication modes based on traffic conditions. When asymmetric traffic patterns are detected, the system transitions to half-duplex mode to disable the echo canceller and reduce power consumption, while maintaining full-duplex mode when symmetric communication is required
Solution Approach 2:
The system implements periodic mode switching between full-duplex and half-duplex communication based on traffic analysis. The TDM schedule alternates transmission directions in periodic time slots, enabling the system to achieve asymmetric data transmission efficiency while using simplified half-duplex operation during designated periods
2Productivity
If echo canceller is enabled for full-duplex communication, then simultaneous transmission in both directions is achieved, but device complexity increases
Solution Approach 1:
The system extracts and removes the echo canceller component from the communication device when operating in half-duplex mode. By detecting asymmetric traffic patterns, the system disables the echo canceller entirely during half-duplex operation, simplifying the device architecture and reducing component requirements for scenarios where full-duplex capability is not needed
3Device complexity
If TDM communications schedule with silent period is implemented, then echo fade-out is achieved without echo canceller, but transmission time slots are limited
Solution Approach 1:
The system changes the temporal parameters of communication by implementing TDM schedules with specific silent periods between transmission slots. By adjusting the duration and positioning of these silent periods, the system allows echo to fade out naturally without requiring echo cancellation, optimizing the balance between transmission efficiency and echo management
Data Source
AI summary
Methods for communications and of communication device involve determining a half-duplex communications mode for a communications device, and in response to determining the half-duplex communications mode for the communications device, disabling an echo canceller of the communications device and determining a time-division multiplex (TDM) communications schedule over a point-to-point communications link. In response to disabling the echo canceller and determining the TDM communications schedule over the point-to-point communications link, data transmission is conducted over the point-to-point communications link according to the TDM communications schedule without echo cancellation at the communications device. The TDM communications schedule specifies non-overlapping transmission time slots for different communications devices and a silent period for echo fade-out between consecutive transmission time slots of the non-overlapping transmission time slots.