DCI Format 2_0 Detection With Optional Indicator Fields

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Solution Overview

Problem

Existing mobile communication systems lack a clear method to specify the data transmission behavior of terminal devices when a part of the indicator fields in the DCI format 2_0 are not configured.

Innovation Solution

The proposed solution involves a method for a terminal device to detect and respond to a DCI format 2_0, where the device determines whether to receive a configured grant downlink channel based on the configuration of slot format indicator, channel occupancy duration indicator, and resource block set indicators.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the DCI format 2_0 includes optional indicator fields (SFI-index, available RB set indicator, channel occupancy duration indicator), then the adaptability of the system is improved, but the device complexity increases due to the need to handle different configuration cases

Engineering Contradiction:
ImproveadaptabilityVSAvoiddevice complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies local quality by making the indicator fields optional rather than mandatory. Each indicator field (SFI-index, available RB set indicator, channel occupancy duration indicator) can be independently configured or not configured based on system requirements. This allows the system to have high adaptability where needed while maintaining simplicity where not required, resolving the contradiction between adaptability and device complexity.

Inventive Principle:
Principle #3Local quality

2Measurement precision

If all indicator fields in DCI format 2_0 are configured, then the measurement precision of resource allocation is improved, but the loss of information increases when some fields are not configured

Engineering Contradiction:
Improvemeasurement precisionVSAvoidloss of information
Core Design Contradiction:
Measurement precisionVSLoss of information

Solution Approach 1:

The patent implements partial action by configuring only the necessary indicator fields based on system requirements rather than configuring all fields unconditionally. The terminal device is configured to detect DCI format 2_0 with specific indicator fields (SFI-index, available RB set indicator, channel occupancy duration indicator) only when needed. This approach maintains measurement precision for configured fields while avoiding information loss issues that would arise from incomplete configuration of unnecessary fields.

Inventive Principle:
Principle #16Partial or excessive action

Data Source

PatentUS12238739B2DCI format reception method and configured grant downlink channel reception method
Publication Date: 2025.02.25 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD
  • US12238739B2 patent drawing
  • US12238739B2 patent drawing
  • US12238739B2 patent drawing

AI summary

Disclosed are a DCI format receiving method, a pre-configured downlink channel receiving method, a DCI format configuration method, a pre-configured downlink channel sending method and apparatus, a terminal device, and a network device. The DCI format receiving method at least includes: a terminal device being configured to detect a DCI format 2_0, wherein the terminal device does not expect a no slot format indicator field to be configured in the DCI format 2_0; or, if the terminal device determines that no slot format indicator field is configured in the DCI format 2_0, the terminal device not detecting the DCI format 2_0; or, if the terminal device determines that a slot format indicator field is configured in the DCI format 2_0, the terminal device detecting the DCI format 2_0.