Terminal TDRA Field Size Determination for Flexible Scheduling

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Solution Overview

Problem

In future radio communication systems, such as NR, the challenge lies in appropriately determining the allocation of shared channels when the number of time domain resource allocation candidates configured for the UE changes, affecting the reception processing of downlink control information and the flexibility of channel configuration.

Innovation Solution

A terminal that receives downlink control information and determines the size of the time domain resource allocation field based on information notified by higher layer signaling, allowing for flexible configuration of shared channel allocation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the number of time domain resource allocation candidates is increased to improve scheduling flexibility, then adaptability is improved, but device complexity increases

Engineering Contradiction:

Improvescheduling flexibilityVSAvoidterminal processing complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements dynamic adaptation by enabling the terminal to flexibly determine the TDRA field size based on the actual number of configured time domain resource allocation candidates. This allows the system to adapt the DCI structure dynamically according to the scheduling flexibility requirements, resolving the contradiction between adaptability and device complexity.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of TDRA field size in DCI based on the number of configured candidates. When the number of candidates changes, the TDRA field size is adjusted accordingly, allowing the system to achieve different levels of scheduling flexibility without maintaining a fixed complex structure, thus resolving the technical contradiction.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If the TDRA field size is fixed to simplify terminal processing, then device complexity is reduced, but adaptability deteriorates

Engineering Contradiction:

Improveterminal processing complexityVSAvoidconfiguration flexibility

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent makes the TDRA field size dynamic rather than fixed. The terminal determines the appropriate field size based on the configured number of time domain resource allocation candidates, enabling the system to maintain simple processing when few candidates are needed while achieving high adaptability when more candidates are configured.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent creates a universal DCI structure that can function with different TDRA field sizes depending on the configuration. The same DCI format can accommodate both small and large numbers of candidates by adjusting the field size, providing multi-functionality that resolves the contradiction between simplicity and adaptability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20220408472A1Terminal and radio communication method

Publication Date: 2022.12.22 NTT DOCOMO INC

AI summary

One aspect of a terminal of the present disclosure includes a receiving section that receives downlink control information including a time domain resource allocation (TDRA) field, and a control section determines a size of the TDRA field, based on information notified by higher layer signaling.