Beam Switching via Power Delay Profile Analysis
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Solution Overview
Problem
Current beam switching technologies in mobile communication systems are limited in their ability to efficiently reconfigure beam alignment based on signal power and Doppler shift, leading to suboptimal communication links and potential interference.
Innovation Solution
The system determines whether to initiate beam switching at a user device based on signal power and Doppler shift, opting for either communication node-assisted or non-communication node-assisted beam switching, and autonomously switches beams when necessary, using power delay profiles to identify usable candidate links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam switching is initiated based on signal power threshold, then communication link reliability is improved, but unnecessary beam switching may occur causing interference and reducing system efficiency
Solution Approach 1:
The system performs preliminary assessment by analyzing power delay profile (PDP) to identify usable candidate links before initiating beam switching. This preliminary action prevents unnecessary beam switching by ensuring that switching only occurs when viable alternative links exist, thereby maintaining communication reliability while avoiding harmful interference from premature or unnecessary beam changes.
2Measurement precision
If communication node assisted beam switching is used, then beam alignment accuracy is improved, but system complexity and signaling overhead increase
Solution Approach 1:
The user device autonomously determines whether to initiate beam switching by independently analyzing signal power, Doppler shift, and power delay profile. This self-service approach allows the device to perform beam switching decisions locally without requiring complex communication node assistance, thereby maintaining beam alignment accuracy while reducing system complexity and signaling overhead.
3Speed
If autonomous beam switching is implemented, then response speed is improved, but beam alignment precision may deteriorate
Solution Approach 1:
The system incorporates feedback mechanisms by continuously monitoring signal power, Doppler shift, and power delay profile to dynamically adjust beam switching decisions. This feedback loop enables the autonomous beam switching to maintain precision by using real-time channel conditions to guide switching actions, ensuring that beam alignment accuracy is preserved while achieving fast response speeds.
4Speed
If beam switching is performed without checking usable candidate links, then switching speed is improved, but communication reliability deteriorates
Solution Approach 1:
The system performs preliminary analysis of the power delay profile to identify usable candidate links before executing beam switching. This preliminary check ensures that beam switching only occurs when viable alternative links are available, thereby maintaining communication reliability while preserving switching speed by avoiding unnecessary switching operations rather than slowing down the switching process itself.
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 communication efficiency by optimizing beam alignment, reducing unnecessary CSI-RS transmissions, and improving directional gain while minimizing interference.
Implementation Method 1
determining whether to initiate beam switching to reconfigure the beam alignment at said receiver based, at least in part, on a signal power (e.g. RSRP) of the received downlink reference signal
Implementation Method 2
identifying whether a channel between the communication node and the user device supports one or more usable candidate links other than a first link used for the configured beam alignment... analysing a power delay profile (PDP) of the received downlink reference signal
Implementation Method 3
determining whether a Doppler shift of the received downlink reference signal is above a threshold level
Data Source
AI summary
An apparatus, method and computer program is described comprising: receiving, at a user device, a downlink reference signal from a communication node of a mobile communication system, wherein the downlink reference signal is received by one of a plurality of beams of a receiver of the user device in accordance with a configured beam alignment; determining whether to initiate beam switching to reconfigure the beam alignment at said receiver based, at least in part, on a signal power of the received downlink reference signal; and determining, in the event that beam switching is to be initiated, whether to initiate communication node assisted beam switching or non-communication node assisted beam switching.