Uplink Beam Configuration Using Downlink Signal Measurements
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Solution Overview
Problem
Current mobile communication systems face challenges in determining accurate positioning signals due to limitations in downlink and uplink beam configurations, particularly when the number of available uplink beams is less than the number of communication nodes, and in scenarios with high mobility or complex multipath environments.
Innovation Solution
A user device receives downlink positioning signals from multiple communication nodes, determines the angle and time of arrival, and configures uplink positioning signal beams based on this data, incorporating inertial sensor measurements and orientation information to optimize beam selection, even when downlink signals are received as beamed, omnidirectional, or wide beam signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the number of uplink beams is reduced to save resources, then resource utilization improves, but positioning accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by using downlink signal measurements (angle of arrival, time of arrival, signal strength) to pre-determine the optimal uplink beam configuration before actual positioning. This allows the system to select only the necessary subset of uplink beams in advance, ensuring positioning accuracy while reducing the number of beams that need to be actively managed, thus improving resource utilization.
2Reliability
If beam configuration is optimized for high mobility scenarios, then positioning reliability improves, but system complexity increases
Solution Approach 1:
The patent applies dynamics by making the uplink beam configuration adaptive to user mobility conditions. The system dynamically adjusts beam selection and configuration based on measured parameters from downlink signals and mobility state, allowing optimal positioning performance for high mobility scenarios without requiring a completely complex static system design. The complexity is managed by using measurement-based adaptation rather than pre-configuring all possible scenarios.
3Area of stationary object
If multiple downlink beams are used to cover more cells, then positioning coverage improves, but determining the optimal uplink beam becomes more difficult
Solution Approach 1:
The patent applies feedback by using measurements from downlink positioning signals (angle of arrival, time of arrival, signal strength from multiple beams) to determine the optimal uplink beam configuration. The system receives feedback from the environment through signal measurements and uses this information to select the best uplink beams, simplifying the configuration process despite covering multiple cells with multiple downlink beams.
Data Source
AI summary
An apparatus, method and computer program is described comprising: receiving downlink positioning signals from each of a plurality of communication nodes of a mobile communication system at a user device of the mobile communication system, wherein each downlink positioning signal is received from a downlink beam direction for the respective communication node; determining an angle of arrival and/or a time of arrival for each of the received downlink positioning signals; and determining an uplink positioning signal beam configuration based, at least in part, on the determined angle of arrival and/or the determined time of arrival for said received downlink positioning signals.