Dynamic Beam Width Management for Sidelink Communication
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing beams for device-to-device communication in sidelink communication, particularly in mmWave V2X communication, where fixed beam widths may not effectively cover necessary regions and lead to increased overhead and beam failure probabilities due to varying distances and locations of terminals.
Innovation Solution
A method for dynamically setting beam widths and numbers based on target regions, with different beam configurations for discovery and tracking phases, allowing for flexible beam management to optimize coverage and reduce overhead by using wider beams for closer terminals and narrower beams for farther ones, thereby improving beam tracking efficiency and reducing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed beam widths are used for all terminals, then beam configuration is simple, but coverage effectiveness deteriorates due to varying distances and locations of terminals
Solution Approach 1:
The patent applies dynamics by transitioning from fixed beam widths to dynamic beam width adjustment. The beam width is adapted based on terminal distance and location, allowing the system to respond to changing conditions. Specifically, the beam management entity determines appropriate beam widths based on terminal positions and adjusts beam configurations dynamically to maintain optimal coverage effectiveness while accounting for varying distances and locations of terminals in the network.
2Area of stationary object
If wider beams are used to cover larger regions, then coverage area increases, but beam failure probability increases due to reduced precision
Solution Approach 1:
The patent applies local quality by making different parts of the coverage area have different beam widths. Instead of using a uniform beam width across all regions, the system configures wider beams for distant terminals requiring larger coverage areas and narrower beams for closer terminals where precise targeting is sufficient. This localized adaptation of beam quality ensures each terminal receives appropriate beam coverage, maintaining reliability while achieving necessary coverage areas.
3Measurement precision
If narrower beams are used for precise targeting, then beam precision improves, but coverage area decreases and overhead increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the beam width parameter based on terminal distance and location. The beam management entity modifies the beam width parameter to match the specific requirements of each terminal scenario. For distant terminals, larger beam width parameters provide sufficient coverage without excessive precision requirements, while for closer terminals, smaller beam width parameters achieve precise targeting with reduced overhead. This adaptive parameter adjustment optimizes the balance between precision and overhead.
4Reliability
If more beams are configured to cover all regions, then coverage completeness improves, but resource allocation overhead increases
Solution Approach 1:
The patent applies partial or excessive action by configuring beams selectively rather than uniformly across all regions. The beam management entity determines which regions require beam coverage based on terminal locations and distances, allocating beams only where necessary. This approach provides sufficient coverage completeness for active terminals while avoiding the overhead of configuring beams in all possible regions, achieving an optimal balance between coverage completeness and resource allocation efficiency.
Data Source
AI summary
A method of performing device-to-device (D2D) communication by a first terminal in a wireless communication system may comprise the first terminal obtaining beam configuration information, sweeping at least one or more beams based on the beam configuration information and transmitting it to a second terminal, and receiving detected beam information from the second terminal. In this case, beam widths and number of the at least one or more beams configured based on the beam configuration information may be determined based on a target region.