Reference Signal Transmission Power and Bandwidth Control
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Solution Overview
Problem
Wireless communication systems, particularly in 5G and MIMO systems, face challenges in accurately determining position due to propagation loss and interference, where boosting transmission power at base stations does not always improve measurement accuracy without unnecessary power consumption.
Innovation Solution
A method that involves transmitting reference signals with adjustable transmission parameters based on signal-to-noise ratio (SNR) and bandwidth limitations, allowing for optimized power and bandwidth settings to enhance measurement accuracy without excessive power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If transmission power is boosted at base stations, then measurement accuracy improves, but power consumption increases unnecessarily
Solution Approach 1:
The patent implements dynamic adjustment of reference signal transmission parameters (power and bandwidth) based on real-time channel conditions and UE feedback. The base station transitions from static high-power transmission to adaptive power control, modifying transmission parameters according to measured SNR and bandwidth availability, thereby resolving the contradiction between maintaining measurement accuracy and reducing power consumption
Solution Approach 2:
The patent changes physical transmission parameters (power level and bandwidth) of reference signals based on channel conditions. By adjusting these parameters dynamically - increasing power only when SNR is low and decreasing power when conditions are good - the system achieves accurate positioning measurements while minimizing unnecessary power consumption at the base station
2Measurement precision
If reference signal bandwidth is increased, then measurement accuracy improves, but transmission power consumption increases
Solution Approach 1:
The patent implements dynamic bandwidth adjustment where the base station modifies reference signal bandwidth based on UE feedback about measurement limitations. The system transitions from fixed bandwidth transmission to adaptive bandwidth allocation, expanding bandwidth only when measurement accuracy is bandwidth-limited and reducing bandwidth when sufficient, thereby resolving the contradiction between measurement precision and power consumption
Solution Approach 2:
The patent changes the bandwidth parameter of reference signals based on channel conditions and UE feedback. By dynamically adjusting bandwidth - increasing it when measurement accuracy is bandwidth-limited and decreasing it when conditions are sufficient - the system achieves accurate positioning measurements while minimizing transmission power consumption
3Use of energy by moving object
If transmission parameters are adjusted dynamically, then power efficiency improves, but system complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the UE measures reference signal quality and reports back to the base station about measurement limitations (SNR-limited or bandwidth-limited). This feedback loop enables the base station to make informed decisions about parameter adjustments, achieving power efficiency through targeted adjustments rather than complex continuous optimization, thereby resolving the contradiction between power efficiency and system complexity
Solution Approach 2:
The patent enables the UE to self-assess its measurement conditions and provide feedback about what limits its positioning measurements. The UE essentially serves itself by identifying its own measurement constraints and communicating them to the base station, which then makes simple parameter adjustments based on this feedback, reducing the need for complex base station-side analysis while achieving power efficiency
Data Source
AI summary
Disclosed are techniques for transmitting reference signals (RS) for positioning. A method comprises transmitting or providing an instruction to transmit a first set of RS to a user equipment (UE) in accordance with a first set of RS transmission parameters, receiving a report containing information indicating whether a measurement performed by the UE is limited by a signal-to-noise ratio (SNR) of the first set of RS or a bandwidth of the first set of RS, determining a second set of RS transmission parameters using the received report, wherein the second set of RS transmission parameters is different from the first set of RS transmission parameters, and transmitting a second set of RS to the UE in accordance with the second set of RS transmission parameters, or providing the second set of RS transmission parameters to a base station.