Beam Search Overhead Reduction via Location-Aware Directional Control
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in beam searching and transmission, particularly in Vehicle-to-Everything (V2X) communication, where high mobility and numerous potential beam directions lead to significant overhead and potential beam matching errors.
Innovation Solution
A method where a first user equipment (UE) performs beam searching or beam transmission based on location information received from a second UE, adjusting beam width and direction according to the service type, such as safety messages, to reduce overhead and improve efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam searching is performed in all potential directions to ensure complete coverage, then communication reliability is improved, but overhead and complexity increase significantly
Solution Approach 1:
The patent applies preliminary action by having UEs exchange location information before beam searching begins. This allows each UE to predict the other's position and limit beam searching to a reduced angular range based on expected location, rather than scanning all possible directions. The location information is obtained in advance through signaling protocols, enabling the beam search to focus only on relevant sectors.
Solution Approach 2:
The patent implements local quality by making beam searching behavior adaptive to local conditions - specifically, the angular range for beam searching is adjusted based on the predicted location of the peer UE. Instead of uniform omnidirectional scanning, the system concentrates beam searching efforts in the specific angular sector where the peer UE is expected to be located, optimizing resource usage while maintaining reliability.
2Area of stationary object
If beam width is increased to cover more area for safety messages, then communication coverage is improved, but beam precision and focus deteriorate
Solution Approach 1:
The patent applies dynamics by making beam width adjustable based on service type requirements. For safety messages, the beam width is dynamically increased to ensure broader coverage and higher reliability, while for other services, narrower beams maintain precision. This dynamic adaptation allows the system to optimize between coverage and precision according to the specific communication needs.
Data Source
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Figure 2
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AI summary
An embodiment of the present invention relates to a method for performing beam search or beam transmission by a first UE in a wireless communication system, the method comprising the steps of: receiving location information from a second UE; and performing at least one of beam search and beam transmission for an area determined on the basis of the received location information, wherein one or more of a beam direction, a beam first search direction, and a beam width for the beam search or the beam transmission are determined according to one or more of a location, a speed, and a moving direction of the first UE, and a service and a required packet delay value for the first UE.