Per-UE PCRS Configuration Reporting for Phase Noise Compensation
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Solution Overview
Problem
In wireless communication systems using carrier frequencies above 6 GHz, phase noise significantly impacts communication efficiency, leading to unnecessary signaling overhead due to frequent transmissions of reference signals, which can be inefficient in resource utilization.
Innovation Solution
User equipment (UE) determines a phase-noise compensation reference signal (PCRS) configuration based on its reception capability and transmits this configuration to the base station, allowing for optimized resource mapping, number of ports, and multiplexing schemes to reduce signaling overhead while maintaining performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reference signals are transmitted frequently to compensate for phase noise, then communication performance is improved, but signaling overhead increases and resource utilization becomes inefficient
Solution Approach 1:
The patent implements dynamic reference signal transmission by allowing the UE to report its phase noise estimation capability and receive capability. The base station then adapts the reference signal transmission frequency and configuration based on the specific UE characteristics, transitioning from static frequent transmission to dynamic按需 transmission. This resolves the contradiction by making the system flexible enough to maintain performance while reducing unnecessary overhead.
Solution Approach 2:
The patent changes key parameters including the UE's reported receive capability (e.g., maximum number of reference signal ports, resource mapping patterns) and the base station's transmission configuration. By adjusting these parameters based on UE feedback, the system optimizes the balance between communication performance and signaling overhead for each specific UE scenario.
2Measurement precision
If reference signals are transmitted frequently to mitigate phase noise, then phase noise correction is improved, but wireless resource utilization deteriorates
Solution Approach 1:
The patent applies local quality by tailoring the reference signal configuration to each UE's specific capabilities and channel conditions. Instead of uniform frequent transmission to all UEs, the system configures reference signals locally optimized for each UE's phase noise estimation capability and receive characteristics. This ensures adequate phase noise correction for each UE while avoiding wasteful resource consumption from over-provisioning.
Solution Approach 2:
The system dynamically adjusts reference signal transmission parameters based on real-time UE feedback about its capabilities and channel conditions. The base station modifies transmission frequency, resource allocation, and configuration adaptively, allowing phase noise correction to respond to actual needs rather than following a fixed frequent transmission schedule, thereby improving resource utilization.
3Productivity
If per-UE PCRS configuration reporting is implemented, then resource allocation efficiency is improved, but device complexity increases
Solution Approach 1:
The UE performs self-assessment of its own receive capability and phase noise estimation capability, then autonomously determines and reports its preferred configuration parameters to the base station. This self-service approach eliminates the need for complex network-side configuration management and reduces signaling overhead, as the UE independently optimizes its own resource allocation without requiring extensive network control.
Solution Approach 2:
The patent implements a feedback mechanism where the UE reports its capabilities and preferred configuration to the base station, which then uses this feedback to allocate resources efficiently. The feedback loop enables the network to understand UE-specific requirements and configure reference signals appropriately, improving resource allocation efficiency while keeping the configuration process manageable through structured reporting.
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AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may report a phase-noise compensation reference signal (PCRS) configuration to a base station to enable per-UE PCRS signaling. For example, a UE may operate in a wireless communications system using carrier frequencies greater than 6 GHz, which may be affected by phase noise. The UE may accordingly determine a PCRS configuration based on a capability to receive signals. The PCRS configuration may include a resource mapping for one or more PCRS, a number of PCRS ports used for PCRS, a multiplexing scheme for one or more PCRS ports, or the UE's phase noise estimation capability. The UE may then transmit a reporting message including the PCRS configuration to a base station. The base station may use the PCRS configuration for PCRS transmissions to the UE.