Time-Domain DCI Scheduling Across BWPs to Cut PDCCH Overhead

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Solution Overview

Problem

The current New Radio (NR) system is limited by high physical downlink control channel (PDCCH) overheads due to scheduling one carrier with one piece of downlink control information (DCI), particularly in dynamic spectrum sharing scenarios.

Innovation Solution

A method and device that utilize time domain resource indication information to schedule multiple carriers or bandwidth parts (BWPs) with a single piece of DCI, reducing PDCCH overheads by determining scheduled resources on multiple carriers or BWPs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If one carrier is scheduled with one piece of DCI in the current NR system, then the scheduling simplicity is maintained, but the PDCCH overhead becomes excessively high in dynamic spectrum sharing scenarios

Engineering Contradiction:

Improvescheduling complexityVSAvoidPDCCH overhead

Core Design Contradiction:

Device complexityVSQuantity of substance

Solution Approach 1:

The patent merges the scheduling of multiple carriers into a single DCI by introducing a carrier indicator field that can indicate multiple carriers simultaneously. This allows one DCI to control multiple carriers, reducing the total number of DCIs needed and thereby reducing PDCCH overhead while maintaining scheduling capability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The DCI structure is enhanced with a carrier indicator field that serves multiple functions: it can indicate a single carrier or multiple carriers, and can be configured differently based on system needs. This multi-functionality allows the same DCI structure to handle various scheduling scenarios, improving efficiency in dynamic spectrum sharing.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple carriers are scheduled with separate DCIs, then the scheduling flexibility is maintained, but the PDCCH overhead increases significantly

Engineering Contradiction:

Improvescheduling flexibilityVSAvoidPDCCH overhead

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The patent combines multiple carrier scheduling into a single DCI by using a carrier indicator field that can specify multiple carriers. This merging approach maintains scheduling flexibility for dynamic spectrum sharing while significantly reducing the number of separate DCIs required, thereby reducing PDCCH overhead.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The carrier indicator field's configuration parameters are changed to allow it to indicate either a single carrier or multiple carriers based on system needs. This parameter flexibility enables the system to adapt to different scheduling scenarios while using a unified DCI structure, reducing overhead without sacrificing flexibility.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP4138501B1Resource determination method, indication method and device

Publication Date: 2025.12.24 VIVO MOBILE COMM CO LTD

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AI summary

The present invention provides a resource determining method, a resource indication method, and a device, and relates to the technical field of communications. The resource determining method is applied to a user side device, and includes: obtaining time domain resource indication information of downlink control information DCI, where the time domain resource indication information supports scheduling of multiple carriers or bandwidth parts BWPs; and determining a scheduled time domain resource on the multiple carriers or BWPs according to the time domain resource indication information.