JPTA Beam Management Across Component Carriers With Integrated CSI
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing beams in joint phase and time array (JPTA) systems with multiple component carriers, particularly in high-frequency bands like mmWave and THz, due to hardware constraints and limited digital precoding ports, which affect radio interface efficiency and coverage.
Innovation Solution
Implementing a JPTA system with multiple component carriers that includes a UE and a BS, where the UE measures and reports integrated channel state information (CSI) based on frequency-selective CSI-RSs across component carriers, and the BS transmits configuration information for beam management, optimizing beam selection and refinement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If digital precoding ports are increased to improve beam management capability, then beam selection accuracy is improved, but hardware complexity and cost increase
Solution Approach 1:
The patent segments the beam management process into two distinct phases: analog beamforming for widebeam transmission covering multiple directions, and digital precoding for focused beam refinement. This segmentation allows the system to achieve accurate beam selection without requiring a large number of digital precoding ports throughout the entire process, thereby reducing hardware complexity while maintaining measurement precision.
Solution Approach 2:
The system dynamically switches between analog widebeam transmission mode and digital precoding mode based on the beam management stage. During initial beam discovery, analog widebeams are used to cover multiple directions simultaneously. Once candidate beams are identified, the system transitions to digital precoding for refined beam selection. This dynamic approach optimizes the use of digital precoding ports, reducing the required hardware complexity while maintaining accurate beam selection.
2Area of stationary object
If analog widebeam transmission is used to cover multiple directions, then coverage area is improved, but beam focusing capability deteriorates
Solution Approach 1:
The patent divides the beam transmission process into two segmented stages: first, analog widebeam transmission covers multiple directions simultaneously to ensure comprehensive coverage area; second, digital precoding is applied to specific candidate beams to achieve precise focusing capability. This segmentation allows the system to enjoy both wide coverage and accurate beam focusing without compromise.
Solution Approach 2:
The system performs preliminary analog widebeam transmission to identify candidate beams before applying digital precoding for refinement. This preliminary action ensures that the coverage area is adequately covered first, and then beam focusing capability is enhanced only for the identified candidate beams, optimizing both coverage area and measurement precision efficiently.
3Measurement precision
If frequency-selective CSI-RS measurements are performed across multiple component carriers, then beam management accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent merges the beam management measurements across multiple component carriers by performing frequency-selective CSI-RS measurements and combining the results to generate a unified integrated CSI report. This merging approach allows the system to achieve improved beam management accuracy through multi-carrier measurements while reducing signaling overhead by consolidating the measurement results into a single integrated report rather than separate reports for each carrier.
Solution Approach 2:
The integrated CSI report serves multiple functions simultaneously: it provides beam management information, channel state information, and quality of service metrics across all component carriers in a single unified structure. This multi-functionality reduces the need for separate signaling for each purpose, thereby maintaining high beam management accuracy while minimizing signaling overhead.
4Productivity
If integrated CSI reporting is implemented across component carriers, then radio interface efficiency is improved, but processing complexity increases
Solution Approach 1:
The patent merges CSI measurements from multiple component carriers into a single integrated CSI report, which improves radio interface efficiency by reducing the number of separate reporting instances. The processing complexity is managed by performing the integration at the UE side using pre-configured measurement parameters, distributing the processing load and avoiding centralized complex processing.
Solution Approach 2:
The UE autonomously performs the integration of CSI measurements across component carriers using configuration parameters provided by the base station. This self-service approach allows the UE to generate the integrated CSI report without requiring complex centralized processing, thereby improving radio interface efficiency while keeping processing complexity manageable at the device level.
Data Source
AI summary
Apparatuses and methods for beam management in joint phase and time array (JPTA) system with multiple component carriers. A method performed by a user equipment (UE) receiving configuration information related to frequency-selective channel state information reference signals (CSI-RSs) in a set of orthogonal frequency-division multiplexing (OFDM) symbols across component carriers (CCs) for a JPTA beam measurement and integrated channel state information (CSI) report and receiving, based on the configuration information, the frequency-selective CSI-RSs in the set of OFDM symbols across the CCs. The method further includes measuring, based on the configuration information, the frequency-selective CSI-RSs across the CCs, generating the integrated CSI report that includes information associated with measurements of the frequency-selective CSI-RSs across the CCs, and transmitting the integrated CSI report.