Beam Tracking Using Downlink Data and Motion Sensing
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Solution Overview
Problem
Current cellular communication systems face challenges in accurately tracking beams, especially under mobility and changing environmental conditions, relying heavily on reference signals which may not always provide sufficient performance.
Innovation Solution
The use of downlink data reception and motion sensing information to assist in beam tracking, allowing wireless devices to determine and adjust receive beam configurations for improved performance, reducing reliance on reference signals and maintaining multiple beam measurement tables for different orientation ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam tracking relies heavily on reference signals, then measurement accuracy can be maintained, but the system complexity and overhead increase
Solution Approach 1:
The system uses downlink data reception itself to provide beam tracking information, rather than relying on separate reference signals. The data channel carries implicit beam quality metrics that can be extracted during normal operation, making the system self-sufficient and reducing dependency on additional signaling resources.
Solution Approach 2:
The downlink data reception serves dual purposes: delivering user data and providing beam tracking information simultaneously. By extracting signal quality metrics from the data channel, the system performs both communication and beam management functions through a single mechanism, reducing overall system complexity.
2Measurement precision
If frequent reference signal measurements are performed, then beam tracking accuracy is improved, but signal strength and stability during device rotation deteriorate
Solution Approach 1:
The system continuously monitors beam quality through ongoing downlink data reception rather than performing discrete reference signal measurements. This continuous monitoring approach maintains beam tracking accuracy while avoiding interruptions to data transmission, ensuring uninterrupted signal strength and stability during device rotation.
Solution Approach 2:
The system extracts beam quality information from downlink data reception in advance, before beam misalignment occurs during device rotation. By proactively detecting beam quality degradation through data channel metrics, the system can trigger beam adjustments before signal strength deteriorates, maintaining stability during rotation.
3Measurement precision
If multiple beam measurement tables are maintained for different orientation ranges, then beam tracking accuracy under mobility improves, but device complexity increases
Solution Approach 1:
The system divides the spatial orientation space into multiple orientation ranges, each with its own beam measurement table. This segmentation allows the device to select the appropriate table based on current device orientation, improving beam tracking accuracy under mobility while managing complexity through organized, modular data structures.
Solution Approach 2:
The system dynamically selects which beam measurement table to use based on real-time device orientation detected through motion sensors. This dynamic adaptation allows the system to maintain high beam tracking accuracy across different mobility scenarios without permanently storing all possible measurement configurations simultaneously, managing memory complexity efficiently.
4Device complexity
If downlink data reception is used for beam tracking, then reliance on reference signals is reduced, but measurement precision may worsen
Solution Approach 1:
The system uses downlink data reception as an intermediary to obtain beam quality information. Instead of directly measuring reference signals, the system extracts implicit quality metrics from the data channel, which reflects actual beam performance during user data transmission. This intermediary approach provides more realistic beam quality assessment while reducing reference signal dependency.
Data Source
AI summary
This disclosure relates to performing receive beam tracking using motion sensing information in a cellular communication system. A wireless device and a cellular base station may establish a cellular link. A receive beam configuration may be selected for the cellular link. A downlink data beam may be received using the selected receive beam configuration. A possible modification to the receive beam configuration may be selected based at least in part on motion sensing information for the wireless device. It may be determined whether the possible modification to the receive beam configuration improves downlink data beam reception. It may be determined whether to modify the receive beam configuration for the cellular link in accordance with the possible modification to the receive beam configuration, for example based on whether the possible modification to the receive beam configuration improves downlink data beam reception.