Network-Assisted Passive Object Sensing with LOS/NLOS Angular Offsets
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Solution Overview
Problem
Current communication systems struggle to accurately sense passive objects without orientation information, particularly when the link condition between the base station and user equipment is unknown, leading to incorrect beam configuration.
Innovation Solution
A method is introduced where a device sends indications of reference signal resources and angular offsets to a second device, including both line-of-sight and non-line-of-sight conditions, allowing the second device to configure its spatial filter accurately based on its estimated link conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If beam correspondence is used to configure UE transmission without orientation information, then the need for orientation information is alleviated, but the beam configuration becomes incorrect when link condition is unknown
Solution Approach 1:
The patent provides multiple angular offsets (first angular offset for LOS condition, second angular offset for NLOS condition) as different parameter values. The network selects the appropriate offset based on the detected link condition, effectively changing the beam direction parameter to adapt to different propagation environments and resolve the beam configuration accuracy issue.
Solution Approach 2:
The system dynamically adapts the beam configuration by switching between different angular offsets based on real-time link condition detection. This dynamic adjustment allows the beam direction to change according to whether the current condition is LOS or NLOS, maintaining configuration accuracy without requiring orientation information.
2Reliability
If multiple angular offsets are provided for different link conditions, then beam configuration accuracy is improved, but resource overhead increases
Solution Approach 1:
The patent segments the angular offset information into distinct components: a first angular offset for LOS conditions and a second angular offset for NLOS conditions. This segmentation allows the network to transmit only the necessary offset information corresponding to the detected link condition, reducing overhead while maintaining accuracy.
Solution Approach 2:
Instead of providing all possible angular offsets for every possible condition, the patent provides partial information (only LOS and NLOS offsets) that covers the main link conditions. This partial action approach reduces the amount of information to transmit while still achieving reliable beam configuration.
3Productivity
If the network assumes a specific link condition (LOS or NLOS), then beam computation can be performed, but incorrect assumptions lead to false beam computation
Solution Approach 1:
The network performs link condition detection to obtain feedback information about the actual propagation condition. Based on this feedback (whether the detected condition matches the assumed condition), the network selects the appropriate angular offset to compute the beam direction, ensuring accuracy while maintaining computational capability.
Solution Approach 2:
The patent prepares multiple angular offsets in advance for different link conditions (LOS and NLOS). When the network needs to compute the beam, it first detects the link condition and then selects the pre-prepared appropriate offset, avoiding the need for complex real-time computation while ensuring accuracy.
Data Source
AI summary
A first device senses an object in a target area. The first device is operable to send, to a second device being connectible with the first device, an indication of one or more reference signal (RS) resources being associated with respective beams of the second device, and an indication of two or more angular offsets relative to a spatial direction of a respective beam being associated with the one or more RS resources. The two or more angular offsets include a line-of-sight (LOS) angular offset for a LOS link condition between the first device and the second device, and a non-line-of-sight (NLOS) angular offset for an NLOS link condition between the first device and the second device.