Multi-Port Receive Beam Reporting for Reliable Beam Pair Selection
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Solution Overview
Problem
Existing wireless communication systems face challenges in selecting beam pairs with the highest signal quality due to the averaging of measurements across multiple ports at the user equipment (UE), which can lead to suboptimal communication reliability.
Innovation Solution
The implementation of an iterative joint beam pair selection procedure, where the base station transmits reference signals through multiple transmission beams, and the UE receives these signals using multiple receive beams, allowing for the identification of a beam pair with higher reliability by generating a measurement report that includes separate measurements for each port.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the UE averages measurements across multiple ports to simplify reporting, then the device complexity is reduced, but the measurement precision deteriorates leading to suboptimal beam pair selection
Solution Approach 1:
The patent segments the measurement report by including separate measurement values for each port instead of a single averaged value. The UE measures and reports channel state information, reference signal receive power, and signal-to-interference-plus-noise ratio separately for each port, allowing the network to evaluate the performance of individual ports and make more accurate beam pair selections based on the specific measurement results of each port.
Solution Approach 2:
The patent changes the measurement reporting parameter from a single averaged value to multiple separate measurement values corresponding to different ports. This parameter change enables the network to understand the specific performance characteristics of each port and select beam pairs based on the actual measurement quality of individual ports, thereby improving measurement precision without significantly increasing device complexity.
2Measurement precision
If the UE reports separate measurements for each port to improve beam pair selection accuracy, then the measurement precision is improved, but the loss of information increases due to more complex reporting requirements
Solution Approach 1:
The patent makes the measurement report multi-functional by including both individual port measurements and enabling the network to derive multiple pieces of information from a single report structure. The report simultaneously provides channel state information, reference signal receive power, and signal-to-interference-plus-noise ratio for each port, allowing the network to perform comprehensive beam pair selection without requiring multiple separate reporting mechanisms.
Solution Approach 2:
The patent implements a feedback mechanism where the UE measures and reports detailed channel state information for each port, and the network uses this feedback to select optimal beam pairs. The feedback loop continues with the network transmitting reference signals and the UE providing updated measurements, enabling continuous optimization of beam pair selection based on actual channel conditions and measurement precision.
3Reliability
If the base station transmits reference signals through multiple transmission beams for iterative beam pair selection, then the reliability of communication is improved, but the use of energy increases due to repeated transmissions
Solution Approach 1:
The patent implements periodic beam sweeping where the base station transmits reference signals through multiple transmission beams in a systematic sequence. The base station iteratively transmits reference signals using different transmission beams from a set of beams, allowing the UE to measure and report the quality of each beam pair. This periodic action ensures comprehensive coverage of possible beam pairs while managing energy consumption through structured, repeated transmissions.
Solution Approach 2:
The patent performs preliminary beam pair selection through iterative measurement and reporting before establishing the final communication link. The base station and UE perform beam sweeping and measurement procedures in advance to identify the optimal beam pair, ensuring that subsequent communication uses the most reliable beams. This preliminary action reduces the need for energy-intensive retransmissions and adjustments during actual data transmission.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a control message triggering the UE to perform an iterative joint beam pair selection procedure for selecting a receive beam and a transmission beam. In some cases, the UE may additionally receive control signaling from the base station configuring the UE to generate a measurement report associated with the receive beam (e.g., that is associated with a first and second port of the UE). The UE may then receive a reference signal via the receive beam. Based on receiving the reference signal, the UE may transmit the measurement report to the base station, where the measurement report indicates at least one measurement, a first resource index corresponding to the first port of the UE, and a second resource index corresponding to the second port of the UE.