Reference Signal Location for Dynamic TDD Interference
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Solution Overview
Problem
Current 5G communications systems lack a method to effectively support dynamic Time Division Duplex (TDD) and maintain forward compatibility, which is essential for flexible service adaptation and future-proofing.
Innovation Solution
Determining the location of reference signals for both uplink and downlink data demodulation, allowing for improved interference estimation and cancellation, thereby enhancing spectrum efficiency and latency performance while ensuring compatibility with evolving features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic TDD is implemented to improve spectrum efficiency and latency, then system adaptability improves, but interference management complexity increases
Solution Approach 1:
The patent introduces reference signals as intermediary elements that mediate between uplink and downlink transmissions. These reference signals enable the receiving device to estimate and cancel interference from the other direction, thus managing interference complexity while maintaining dynamic TDD adaptability
Solution Approach 2:
The patent applies asymmetry by configuring reference signals differently for uplink and downlink directions. The first reference signal for uplink data demodulation and the second reference signal for downlink data demodulation are configured with different parameters, allowing optimized interference estimation for each direction while maintaining overall system adaptability
2Measurement precision
If reference signals are configured for interference estimation, then measurement precision improves, but device complexity increases
Solution Approach 1:
The reference signals serve multiple functions simultaneously: they are used for channel estimation, data demodulation, and interference estimation. This multi-functionality reduces the need for separate dedicated interference estimation signals, thereby improving measurement precision without proportionally increasing device complexity
Solution Approach 2:
The patent configures reference signals with specific local properties tailored to interference estimation requirements. By optimizing the reference signal characteristics at specific resource elements where interference is most problematic, the system achieves high measurement precision without configuring complex signals across the entire bandwidth
Data Source
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AI summary
Embodiments of the present invention disclose a method for transmitting and receiving information, user equipment, and a base station to better support dynamic TDD and keep forward compatibility. A method in an embodiment of the present invention includes: determining, by a first device, a location of a reference signal; and transmitting or receiving, by the first device, the reference signal based on the determined location of the reference signal.