Beam Refinement Trees for Blockage-Resilient Beam Selection
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Solution Overview
Problem
Wireless communication devices face challenges in selecting effective beams due to blockages, leading to inefficient communication and decreased throughput, as they are often constrained to selecting adjacent beams after a blockage occurs.
Innovation Solution
Devices perform enhanced beam refinement procedures, preselecting multiple beams and generating beam trees based on beam metrics like RSRP, allowing them to switch to alternative beams efficiently even when blockages occur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a device selects a single beam for communication, then the communication setup is simple, but the communication reliability deteriorates when the beam is blocked
Solution Approach 1:
The device performs preliminary beam refinement procedures to generate multiple candidate beams (first beam tree and second beam tree) before blockage occurs. This preliminary action ensures that alternative beams are already identified and ready for immediate use when blockage is detected, thereby improving communication reliability without requiring complex real-time decision-making
Solution Approach 2:
The device changes the beam parameter by switching from a blocked beam to an alternative beam from the pre-generated beam trees. This parameter change enables the device to adapt to blockage conditions by selecting beams with different spatial characteristics, thus improving reliability while maintaining manageable complexity through structured beam organization
2Measurement precision
If a device performs beam refinement procedure, then the beam selection accuracy is improved, but the time consumption increases
Solution Approach 1:
The device performs beam refinement procedures in advance to generate complete beam trees (first beam tree and second beam tree) before communication begins or before blockage occurs. This preliminary refinement ensures high beam selection accuracy is achieved beforehand, eliminating the need for time-consuming real-time refinement when blockage occurs
Solution Approach 2:
The device dynamically selects which beam tree to use based on blockage detection. When no blockage is present, the device uses the first beam tree; when blockage is detected, it switches to the second beam tree. This dynamic selection allows the device to maintain high accuracy while minimizing time loss by avoiding unnecessary refinement procedures
3Productivity
If a device is constrained to select adjacent beams after blockage, then the beam selection process is simple, but the communication throughput decreases
Solution Approach 1:
The device pre-generates two distinct beam trees (first beam tree and second beam tree) with multiple candidate beams at different levels before blockage occurs. This preliminary action provides a rich set of alternative beams that are not limited to adjacent beams, enabling the device to maintain high throughput by selecting from diverse beam options when blockage is detected
Solution Approach 2:
The device organizes beams in a hierarchical tree structure with multiple levels, allowing beam selection to occur not only in the adjacent beam dimension but also across different tree levels. This dimensional expansion enables the device to find alternative paths around blockages more effectively, improving throughput while managing complexity through structured organization
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first device may select a first beam and a second beam from a set of beams for communicating with a second device. The first device may perform a beam refinement procedure of the first beam to generate a first multicast autonomous beam refinement tree. The first device may determine a trigger for performing the beam refinement procedure of the second beam, and the first device may generate a second multicast autonomous beam refinement tree. The first device may communicate with the second device using the second beam.