Optical Beacon Beam Management for Sub-THz Wireless
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face inefficiencies in beam management, particularly at higher frequencies like sub-THz, where the large number of beams required for adequate angular coverage leads to increased latency and computing resource consumption during initial beam acquisition and refinement.
Innovation Solution
The use of optical beacons detected by image sensors to determine relative directions, allowing for a reduced number of beams to be used in beam sweeping, focusing on higher beam density in the relative direction and lower beam density elsewhere, thereby speeding up beam management processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If numerous narrow beams are used to achieve adequate angular coverage at higher frequencies, then beam gain and energy collection are improved, but beam management overhead and latency increase quadratically
Solution Approach 1:
The patent replaces the traditional RF-based beam sweeping mechanism with an optical sensing system using image sensors. The image sensor captures optical signals (light) from the transmitter, allowing the receiver to determine the direction of arrival and establish beam alignment without mechanically or electronically sweeping through numerous RF beams. This substitution of optical detection for RF beam scanning dramatically reduces the time required for beam management while maintaining effective energy collection.
Solution Approach 2:
The patent introduces an intermediary optical signal (light beam) that carries directional information between the transmitter and receiver. Instead of directly establishing RF beam alignment through quadratic beam sweeping, the system uses optical beacons or light-based directional indicators as an intermediary to guide the RF beamforming process. This intermediary optical channel provides coarse directional information that eliminates the need for exhaustive RF beam scanning.
2Reliability
If exhaustive beam sweeping is performed for beam acquisition and refinement, then reliable beam alignment is achieved, but computing resources and processing overhead increase
Solution Approach 1:
The patent performs preliminary beam alignment using optical detection before initiating RF beam sweeping. The image sensor captures optical signals to determine the direction of arrival in advance, providing initial beam direction estimates. This preliminary optical-based alignment narrows down the search space for subsequent RF beam refinement, ensuring reliable beam alignment while significantly reducing the number of RF beams that need to be swept and processed.
Solution Approach 2:
The patent applies different quality levels of beam sweeping in different angular regions. Based on optical directional information, the system concentrates detailed RF beam sweeping only in the identified direction of interest, while using wider, coarser beams for other regions. This localized approach to beam management maintains reliable alignment in critical directions while reducing overall computational complexity and processing overhead.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces latency and conserves computing resources by performing beam management faster and using fewer beams, facilitating improved beam management, especially for sub-THz frequencies.
Implementation Method 1
detecting, using an image sensor, an optical beacon of a network node
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may detect, using an image sensor, an optical beacon of a network node. The UE may receive reference signals using a sweep of a plurality of beams that is based at least in part on a relative direction of the optical beacon of the network node. Numerous other aspects are provided.