Beam Search Control Using Terminal Movement Sensors
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Solution Overview
Problem
In 5G wireless communication systems, the movement of terminals poses challenges in maintaining optimal beamforming configurations due to variations in beam direction, leading to inefficient resource utilization and reduced coverage, as existing methods fail to accurately account for directional changes during beam search procedures.
Innovation Solution
An apparatus and method that utilize sensors to determine directional changes and adjust beam indices dynamically, allowing for efficient beam selection and maintenance of beamforming configurations by transforming beam operations into directional information, thereby compensating for terminal movement and optimizing beam search processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If beamforming is used to increase signal gain in mmWave bands, then transmission distance and data rate are improved, but beam direction accuracy deteriorates due to terminal movement
Solution Approach 1:
The patent implements feedback by having the terminal report beam measurement information (such as RSRP values) back to the base station. The base station uses this feedback to identify the optimal beam and adjust beamforming configurations, thereby maintaining beam direction accuracy despite terminal movement in mmWave bands.
Solution Approach 2:
The patent performs preliminary beam search and measurement procedures before actual data transmission. The base station and terminal conduct beam training and measurement in advance to establish the optimal beam configuration, which is then used for subsequent communication, ensuring accurate beam direction is established before terminal movement affects performance.
2Reliability
If beam search is performed to find optimal beam, then signal quality is improved, but resource utilization deteriorates due to extensive beam searching required
Solution Approach 1:
The patent applies partial action by performing beam search only in necessary directions rather than exhaustively searching all possible beams. The base station uses terminal movement information to limit the beam search scope to relevant angular ranges, achieving adequate signal quality without the resource overhead of complete beam searching.
Solution Approach 2:
The patent performs preliminary beam measurement and reporting procedures where the terminal pre-measures multiple beams and reports only the optimal ones to the base station. This preliminary action reduces the subsequent beam search burden, improving resource utilization while maintaining signal quality.
3Measurement precision
If beamforming configuration is maintained for stationary terminal, then beam direction accuracy is improved, but adaptability deteriorates when terminal moves
Solution Approach 1:
The patent implements dynamic beamforming where the base station continuously adjusts beamforming configurations based on terminal movement information. The beam direction is not fixed but dynamically adapted to track terminal position changes, maintaining accuracy while providing adaptability through real-time configuration updates triggered by movement detection.
Solution Approach 2:
The patent uses feedback loops where terminal movement is detected and reported back to the base station, which then adjusts beamforming configurations accordingly. This feedback mechanism enables the system to maintain beam direction accuracy for stationary terminals while adapting to movement when it occurs, balancing both requirements through continuous monitoring and adjustment.
Data Source
AI summary
An apparatus in a wireless communication system is provided. The apparatus includes at least one transceiver and at least one processor operably coupled to the at least one transceiver. The at least one processor is configured to determine first direction information regarding a first direction of a first beam of the apparatus, determine second direction information regarding a second direction of a second beam of the apparatus based on measurement information regarding a movement of the apparatus, and perform a beam search with another apparatus based on the first direction information and the second direction information.