Selective PT-RS Puncturing for CORESET Collision Avoidance
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Solution Overview
Problem
In wireless communication systems, Phase Tracking Reference Signals (PT-RS) often collide with Control Resource Sets (CORESET) resources, leading to unnecessary puncturing of PT-RS, which reduces decoding rates and degrades phase tracking performance, especially when PT-RS collides with resources scheduled for data transmission rather than control signaling.
Innovation Solution
The transmitter punctures PT-RS only in resource blocks (RBs) colliding with control transmissions, such as Physical Downlink Control Channel (PDCCH), while refraining from puncturing in RBs scheduled for data transmission, like Physical Downlink Shared Channel (PDSCH), to maintain phase tracking accuracy without reducing PT-RS resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PT-RS is punctured in all CORESET resources, then control signal transmission is ensured, but phase tracking performance degrades and PT-RS resources are unnecessarily reduced
Solution Approach 1:
The patent applies local quality by differentiating the treatment of PT-RS based on the specific resource block type. PT-RS is punctured only in RBs allocated for control transmissions (PDCCH) while being preserved in RBs allocated for data transmissions (PDSCH). This localized differentiation resolves the contradiction by ensuring control signal reliability where needed while maintaining phase tracking performance where data transmission occurs.
Solution Approach 2:
The patent segments the CORESET resources into distinct categories: control transmission RBs and data transmission RBs. By identifying and separately handling PT-RS in these different segments, the system ensures that puncturing occurs only where control signals are transmitted, while preserving PT-RS in data transmission regions. This segmentation approach resolves the contradiction between control reliability and phase tracking performance.
2Quantity of substance
If PT-RS is punctured to avoid collision with CORESET, then resource allocation for control is maintained, but decoding rates decrease
Solution Approach 1:
The patent applies local quality by selectively puncturing PT-RS only in the specific local region where control transmissions occur, rather than uniformly across the entire CORESET. This ensures that control resource allocation is maintained in necessary areas while preserving PT-RS resources in data transmission areas, thereby maintaining decoding rates.
Solution Approach 2:
The patent segments the resource allocation into control-specific RBs and data-specific RBs within the CORESET. By applying puncturing only to the control transmission segment and preserving the data transmission segment, the system maintains adequate control resource allocation while avoiding unnecessary reduction in PT-RS that would harm decoding performance.
3Stability of the object's composition
If PT-RS resources are reduced due to collision with CORESET, then control transmission integrity is preserved, but phase tracking accuracy deteriorates
Solution Approach 1:
The patent applies local quality by making the PT-RS puncturing decision local to each resource block based on its transmission type. In RBs where control transmissions occur, PT-RS is punctured to preserve control integrity. In RBs where data transmissions occur, PT-RS is preserved to maintain phase tracking accuracy. This localized approach resolves the contradiction by preserving integrity only where control transmissions occur.
Solution Approach 2:
The patent segments the CORESET resources into control transmission regions and data transmission regions. By applying different PT-RS handling strategies to these segments—puncturing in control regions and preserving in data regions—the system maintains control transmission integrity while avoiding unnecessary reduction in phase tracking accuracy.
Data Source
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AI summary
A transmitter, such as a base station, identifies a potential collision between a first set of resources configured for a CORESET for a receiver and a second set of resources configured for a PT-RS for the receiver. The apparatus may determine whether colliding resources in the CORESET are configured/used for a control transmission or a data transmission. The apparatus punctures the PT-RS based on whether the colliding resources in the CORESET are configured/used for the control transmission (e.g., PDCCH). For example, the apparatus may puncture the PT-RS only for resource blocks of the CORESET colliding with the control transmission without puncturing the PT-RS over an entire set of the colliding resources configured for the CORESET. A receiver may similarly identify potential collisions and determine whether PT-RS will be punctured based on whether the colliding resources in the CORESET are configured/used for a control transmission or a data transmission.