Semi-Persistent Scheduling PDSCH Multi-TRP Collision Handling

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Solution Overview

Problem

Current timelines for handling collisions between dynamic and semi-persistent scheduling channels in new radio (NR) do not account for user equipment (UE) capabilities, leading to unnecessary scheduling restrictions, especially when channels are transmitted from different transmission and reception points (TRPs), and unclear configurations for SPS PDSCH operations.

Innovation Solution

The proposed solution enhances the timeline to reflect UE capabilities, allowing the UE to receive SPS PDSCH and dynamic PDSCH from different TRPs regardless of time gaps, and clarifies configurations for SPS PDSCH operations by determining repetition numbers based on aggregation factors and time domain resource allocations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the timeline is enhanced to reflect UE capabilities and allow reception from different TRPs regardless of time gaps, then scheduling flexibility and efficiency are improved, but the complexity of handling multi-TRP operations and configuration interactions increases

Engineering Contradiction:
Improvescheduling efficiencyVSAvoidmulti-TRP operation complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent applies local quality by making the collision handling behavior TRP-specific. When PDSCHs are from different TRPs, the UE applies different rules (allows collision) compared to same TRP (follows traditional timeline). This localized differentiation resolves the contradiction by enabling flexible scheduling for multi-TRP while maintaining strict timing for single-TRP operations, preventing excessive complexity growth.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent segments the collision handling logic into separate cases based on TRP identity. The UE determines whether colliding PDSCHs are from the same or different TRPs and applies corresponding handling rules. This segmentation allows the system to improve scheduling efficiency for multi-TRP operations without unnecessarily complicating single-TRP operations, thus resolving the technical contradiction.

Inventive Principle:
Principle #1Segmentation

2Adaptability or versatility

If the UE receives both SPS PDSCH and dynamic PDSCH from different TRPs despite time gap constraints, then adaptability to multi-TRP scenarios is improved, but the reliability of timing-based collision avoidance mechanisms deteriorates

Engineering Contradiction:
Improvemulti-TRP reception capabilityVSAvoidtiming-based collision avoidance
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies local quality by differentiating collision handling based on TRP identity. When PDSCHs originate from different TRPs, the UE is permitted to receive both despite timing violations, whereas same-TRP operations maintain strict timing adherence. This localized adaptation resolves the contradiction by enabling multi-TRP versatility without compromising the reliability of timing-based mechanisms for operations where they remain applicable.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent introduces dynamic behavior where the UE adaptively adjusts collision handling based on TRP identification. The collision avoidance mechanism transitions from static (always enforce timeline) to dynamic (enforce only when same TRP), allowing the system to maintain reliability where needed while adapting to multi-TRP scenarios, thus resolving the technical contradiction.

Inventive Principle:
Principle #15Dynamics

3Ease of operation

If clear configurations for SPS PDSCH operations are established by determining repetition numbers based on aggregation factors and time domain resource allocations, then ease of operation is improved, but the device complexity for managing multiple configuration parameters increases

Engineering Contradiction:
ImproveSPS PDSCH configuration clarityVSAvoidconfiguration parameter management
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent applies universality by making existing configuration parameters (aggregation factor, time domain resource allocation) serve multiple functions. These parameters simultaneously determine both the number of repetitions and the timing relationships for SPS PDSCH operations. This multi-functionality resolves the contradiction by providing clear operational guidance without requiring separate dedicated parameters, thus avoiding excessive complexity increase.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS20240147474A1Methods and devices for semi-persistent scheduling with multi-transmission and reception point
Publication Date: 2024.05.02 SAMSUNG ELECTRONICS CO LTD
  • US20240147474A1 patent drawing
  • US20240147474A1 patent drawing
  • US20240147474A1 patent drawing

AI summary

Methods and apparatuses are provided in which a first number of repetitions of a semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) within a given slot is determined. A second number of slot repetitions within an SPS period is determined based on at least one of an aggregation factor of an information element (IE) or a repetition number of a time domain resource allocation. The SPS PDSCH is received in accordance with the first number of repetitions within the given slot and the second number of slot repetitions within the SPS period.