Inter-beam Phase Factor Tracking Reference Signal Configuration
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE and NR technologies, face challenges in accurately tracking inter-beam phase changes due to rapid channel fading, which affects the accuracy of estimated combined beams and leads to reduced array gain and increased power consumption.
Innovation Solution
The implementation of an inter-beam phase factor tracking reference signal configuration, where a base station configures and transmits an inter-beam phase factor tracking reference signal to user equipment, allowing both to perform measurements and determine sets of inter-beam phase factors for accurate multi-beam combining, thereby enhancing the tracking of inter-beam phase changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-beam combining is performed over at least two static directions or beams from one or more antenna panels, then wireless communication coverage and signal reception are improved, but inter-beam phase changes occur rapidly due to channel fading, reducing the accuracy of estimated combined beams
Solution Approach 1:
The patent applies preliminary action by configuring and transmitting inter-beam phase factor tracking reference signals before the actual multi-beam combining operation. The base station configures the reference signal parameters in advance and transmits them periodically, allowing the wireless communication device to perform measurements and determine inter-beam phase factors proactively, thereby maintaining accurate beam estimation despite rapid channel fading.
Solution Approach 2:
The patent implements feedback through the measurement of inter-beam phase factor tracking reference signals. The wireless communication device measures the reference signals, determines the inter-beam phase factors, and feeds this information back to improve the accuracy of estimated combined beams. This closed-loop feedback mechanism enables continuous tracking and correction of phase changes, resolving the contradiction between beam combining reliability and phase tracking adaptability.
2Measurement precision
If inter-beam phase factor tracking reference signals are transmitted periodically, then phase tracking accuracy is improved, but additional reference signals increase overhead and consume additional power
Solution Approach 1:
The patent applies periodic action by configuring the base station to transmit inter-beam phase factor tracking reference signals at specific periodic intervals rather than continuously. This periodic transmission pattern allows the wireless communication device to perform measurements at appropriate intervals to track phase changes, achieving sufficient phase tracking accuracy while minimizing the overhead and power consumption associated with constant signal transmission.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may receive, from a base station (BS), an indication of an inter-beam phase factor tracking reference signal configuration for inter-beam phase factor tracking, wherein at least one of the wireless communication device or the BS performs multi-beam combining over at least two static directions or beams from one or more antenna panels. The wireless communication device may perform one or more measurements of an inter-beam phase factor tracking reference signal based at least in part on the inter-beam phase factor tracking reference signal configuration. Numerous other aspects are provided.