Low-Band LOS-Aided Beam Selection for High-Band Links
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Solution Overview
Problem
The increasing number of mobile devices and demand for mobile data traffic in wireless networks leads to challenges in beam selection, particularly in high band communications, which are more power-intensive and resource-costly, leading to increased signaling, signal processing, and battery usage.
Innovation Solution
Utilizing low band communications to determine a line-of-sight (LOS) path and precoder matrix indicator (PMI) for enhanced beam selection, enabling high band communications by providing beam indications based on low band measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high band communications are used for beam selection, then communication capacity and data rate are improved, but power consumption and resource costs increase
Solution Approach 1:
The patent uses low band communications as an intermediary to assist high band beam selection. The low band signals serve as a mediator that provides channel state information and beam direction guidance, enabling the high band system to select beams more efficiently without directly consuming high band resources for the selection process itself.
Solution Approach 2:
The patent changes the frequency parameter from high band to low band for the beam selection process. By performing beam selection measurements and determinations in the low band before switching to high band for actual data transmission, the system achieves high band communication capacity while avoiding the high power consumption associated with continuous high band operation for beam management.
2Productivity
If high band communications are used for beam selection, then communication capacity is improved, but signaling overhead and resource costs increase
Solution Approach 1:
Low band communications act as an intermediary that carries beam selection information with reduced signaling overhead. The system uses low band reference signals and control channels to convey beam direction and channel state information, which then guides high band beam formation without requiring extensive high band signaling for the selection process.
Solution Approach 2:
The patent performs beam selection actions preliminarily in the low band before high band communication begins. By determining beam directions and channel characteristics in advance using low band signals, the system reduces the need for subsequent high band signaling overhead, as the high band system can directly apply the pre-determined beam configurations.
3Use of energy by moving object
If low band communications are used to determine beam parameters, then power consumption is reduced, but beam selection accuracy may be affected
Solution Approach 1:
The patent substitutes physical high band signal measurements with low band signal measurements for beam selection purposes. Since low band signals have better propagation characteristics and require less processing power, they serve as an effective substitute that maintains beam selection accuracy while dramatically reducing power consumption and device resource utilization.
Data Source
AI summary
Techniques, described herein, include solutions for enabling a base station and user equipment (UE) to use low beam (e.g., frequency range 1 (FR1)) communications to determine a line-of-sight (LOS) status of a beam between the base station and the UE, and use the LOS status to establish or maintain a link or channel using a high beam (e.g., frequency range 2 (FR2)).