Terminal PUSCH Repetition Spatial Relation Control

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Solution Overview

Problem

In next-generation mobile communication systems, particularly in NR, the control of PUSCH repetition transmission across multiple transmission/reception points (TRPs) has not been adequately addressed, leading to potential reductions in throughput and degradation in communication quality.

Innovation Solution

A terminal is equipped with a control section that determines spatial relation information for PUSCH across multiple TRPs using RRC signaling, MAC signaling, and DCI, and a transmitting section that repeatedly transmits PUSCH using a spatial domain transmission filter based on this information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If repetition transmission of PUSCH is performed in multi-TRP scenarios without appropriate control mechanisms, then the system can support multiple transmission points, but throughput reduction and communication quality degradation occur

Engineering Contradiction:

Improvemulti-TRP supportVSAvoidthroughput

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent applies preliminary action by determining spatial relation information for PUSCH repetition transmission across multiple TRPs in advance through RRC signaling, MAC signaling, or DCI. This pre-establishment of spatial relationships enables the system to support multi-TRP scenarios without ad-hoc control delays, thereby maintaining throughput while achieving versatility.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

Engineering Contradiction:

Improvemulti-TRP supportVSAvoidcommunication quality

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-determining spatial relation information through higher layer signaling (RRC or MAC) before PUSCH repetition transmission begins. This advance preparation ensures that appropriate spatial filters are ready for multi-TRP operations, guaranteeing communication quality while enabling multi-TRP versatility.

Inventive Principle:

Principle #10Preliminary action

3Ease of operation

If spatial relation information is determined through multiple signaling methods (RRC, MAC, DCI), then appropriate control of PUSCH repetition transmission is achieved, but system complexity increases

Engineering Contradiction:

ImprovePUSCH repetition controlVSAvoidcontrol mechanism complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the control of spatial relation information into multiple independent signaling layers: RRC signaling for basic configuration, MAC signaling for adjustments, and DCI for dynamic updates. This segmentation allows each layer to handle specific control aspects independently, making the overall complex system manageable and operable through standardized procedures.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12289721B2Terminal, radio communication method, and base station

Publication Date: 2025.04.29 NTT DOCOMO INC

AI summary

A terminal according to one aspect of the present disclosure includes a control section that determines spatial relation information for a physical uplink shared channel (PUSCH) for a plurality of transmission/reception points by using at least one of radio resource control (RRC) signaling, medium access control (MAC) signaling, and downlink control information (DCI), and a transmitting section that repeatedly transmits the PUSCH by using a spatial domain transmission filter based on the spatial relation information. According to one aspect of the present disclosure, PUSCH repetition transmission can be appropriately controlled.