Trigger Counter for Wireless Timing Accuracy
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Solution Overview
Problem
Higher data rate communications systems face challenges in achieving precise timing accuracy due to timing uncertainties and bit errors caused by clock domain transfers and asynchronous clock domains, which can lead to co-channel interference and reduced system capacity.
Innovation Solution
The implementation of a wireless communication system where timing triggers for data packet transfers are based on a counter initiated within the transmitting or receiving clock domain, eliminating the need for clock domain transfers and reducing bit errors by using a trigger counter that increments at the transmission sampling rate, allowing for accurate timing of subframes without passing through multiple clock domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If clock domain transfers are used to transfer timing triggers between transmitting and receiving elements, then data transmission can be coordinated between different clock domains, but timing uncertainties and bit errors increase
Solution Approach 1:
A trigger counter serves as an intermediary mechanism that operates within a single clock domain to generate timing triggers. The counter increments at a defined rate and produces triggers based on its count value, eliminating the need for direct clock domain transfers while maintaining coordination between transmitting and receiving elements.
Solution Approach 2:
The timing trigger generation function is extracted from the clock domain transfer mechanism and implemented independently within a single clock domain using a counter. This separates the timing generation function from the data transfer function, allowing timing triggers to be generated reliably without crossing clock domain boundaries.
2Adaptability or versatility
If timing triggers are transferred through multiple clock domains, then flexibility in system architecture is improved, but bit errors and timing uncertainties increase
Solution Approach 1:
The trigger counter acts as an intermediary that generates timing triggers within a single clock domain. By using the counter's incrementing value as the trigger source rather than transferring triggers across clock domains, the system maintains architectural flexibility while achieving precise timing without the errors introduced by multi-domain transfers.
3Reliability
If a counter-based trigger system is implemented within a single clock domain, then timing accuracy is improved, but device complexity increases
Solution Approach 1:
The trigger counter is self-sufficient, incrementing automatically at a defined rate and generating timing triggers based on its own count value without requiring external control signals from other clock domains. This self-service mechanism simplifies the overall system by eliminating complex inter-clock-domain control logic while maintaining high timing accuracy.
Data Source
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AI summary
A wireless communication element (200) comprises a first controller (402) configured to generate data transfer information indicating a trigger value. The wireless communication element further comprises a second controller (404) communicatively coupled to the first controller. The second controller comprises a counter configured to increment a counter value and is configured to receive the data transfer information from the first controller. The second controller (404) is further configured to generate a data transfer trigger when the counter value corresponds with the trigger value such that the wireless communication element initiates a data transfer with a second wireless communication element in response to the data transfer trigger.