Receive Beam Selection for Reference Signal Measurement
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks operating at high frequencies like millimeter wave (mmW) bands, propagation loss and multipath propagation issues affect the accuracy of reference signal measurements, leading to suboptimal beam selection for data communication and positioning tasks.
Innovation Solution
A method for receive beam selection that determines the type of measurement to be performed on a reference RF signal, selects an appropriate receive beam based on the measurement type, generates the selected beam, and receives the reference signal to perform the measurement, optimizing beamforming for either data communication or positioning tasks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If beamforming is used to extend RF signal coverage and increase signal strength, then propagation loss is mitigated, but measurement accuracy deteriorates due to multipath propagation and beam selection issues
Solution Approach 1:
The patent segments the beam selection process into task-specific categories (data communication vs. positioning measurements). Different receive beams are selected based on the measurement type, allowing optimization for each specific function rather than using a single beam for all purposes.
Solution Approach 2:
The patent implements dynamic beam selection where the receive beam is changed based on the measurement task. The system dynamically switches between different receive beams (e.g., first receive beam for data communication, second receive beam for positioning) to optimize performance for each specific measurement type.
2Device complexity
If a single receive beam is used for all measurements, then device complexity is reduced, but measurement precision deteriorates for specific tasks like positioning
Solution Approach 1:
The patent applies local quality by assigning different receive beams to different measurement tasks. The first receive beam is optimized for data communication measurements while the second receive beam is optimized for positioning measurements, giving each task its own specialized beam configuration.
Solution Approach 2:
The patent changes the beam parameter based on the measurement task. The system selects different receive beams (changing the beam parameter) depending on whether the measurement is for data communication or positioning, thereby optimizing measurement precision for each specific task.
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 enhances the accuracy and efficiency of reference signal measurements by selecting the optimal receive beam for specific tasks, mitigating propagation delays and improving signal strength and timing precision in 5G networks.
Implementation Method 1
transmitters may use beamforming to extend RF signal coverage. In particular, transmit beamforming is a technique for emitting an RF signal in a specific direction, whereas receive beamforming is a technique used to increase receive sensitivity of RF signals that arrive at a receiver along a specific direction.
Implementation Method 2
MIMO is a method for multiplying the capacity of a radio link by using multiple transmit and receive antennas to exploit multipath propagation. Multipath propagation occurs because radio frequency (RF) signals not only travel by the shortest path between the transmitter and receiver, which may be a line of sight (LOS) path, but also over a number of other paths as they spread out from the transmitter and reflect off other objects such as hills, buildings, water, and the like on their way to the receiver.
Data Source
AI summary
Disclosed are techniques for receive beam selection for measuring a reference radio frequency (RF) signal. In an aspect, a first node determines a type of measurement to be performed on the reference RF signal, selects a receive beam based on the type of measurement to be performed on the reference RF signal, generates the selected receive beam, receives, from a second node, using the generated receive beam, the reference RF signal transmitted on a wireless channel, and performs one or more measurements on the received reference RF signal according to the type of the measurement to be performed.