Transmission Gap Configuration for Radar Proximity Sensing
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Solution Overview
Problem
5G user equipment (UE) transmission power needs to be reduced to comply with maximum permissible exposure regulations, leading to potential Radio Link Failures due to high gain antennas directing excessive energy towards users, which can result in loss of connection.
Innovation Solution
Implementing a configuration of transmission gaps in downlink slots for radar measurements to accurately determine the proximity of users and dynamically adjust uplink transmission power, utilizing the UE's antenna array as a radar for proximity sensing without additional sensors, thereby optimizing power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If transmission power of user equipment is reduced to comply with maximum permissible exposure regulations, then safety regulations are met, but connection quality deteriorates and radio link failures occur
Solution Approach 1:
The system dynamically adjusts transmission power based on real-time proximity sensing measurements. The UE transitions from static power reduction to dynamic power control, where transmission power is adapted according to the detected distance between the UE and the user, maintaining compliance while preserving connection quality when safe to do so.
Solution Approach 2:
The system implements a feedback loop using the antenna array for radar measurements to continuously monitor user proximity. The transmission power is adjusted based on this feedback, creating a closed-loop control system that balances safety requirements with connection quality maintenance.
2Productivity
If high gain antennas are used to improve signal strength, then uplink throughput is enhanced, but excessive energy is directed towards users causing safety concerns
Solution Approach 1:
The system uses dynamic transmission power adjustment based on proximity measurements to optimize the trade-off between uplink throughput and user safety. High gain antennas can be utilized fully when users are at safe distances, while power is reduced only when proximity measurements indicate potential safety concerns.
Solution Approach 2:
The system changes the transmission power parameter dynamically based on distance measurements from the radar system. This allows the UE to operate at higher power levels (improving throughput) when safe, and reduce power only when necessary to protect user safety.
3Object-affected harmful factors
If transmission power is continuously reduced to ensure safety compliance, then maximum permissible exposure is met, but unnecessary resource wastage occurs and latency increases
Solution Approach 1:
The UE uses its own antenna array to perform radar measurements and determine user proximity, enabling self-service proximity sensing without additional sensors. This allows the UE to make informed decisions about transmission power adjustment, reducing unnecessary power reductions and associated latency.
Solution Approach 2:
The system performs preliminary proximity sensing measurements using the antenna array before adjusting transmission power. This advance knowledge allows the UE to maintain higher transmission power when safe, avoiding unnecessary power reductions and the associated latency and resource wastage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach minimizes unnecessary power reductions, maintains connection quality, and enhances uplink throughput by accurately determining user proximity and adjusting transmission power accordingly, reducing resource wastage and latency.
Implementation Method 1
performing radar measurements during the transmission gap
Data Source
AI summary
There is provided an apparatus comprising at least one processor; and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform: receiving, from a network node, a configuration of a transmission gap in at least one downlink slot; and performing radar measurements during the transmission gap.