Carrier Aggregation Uplink Power Control with Unified Scheduling

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Solution Overview

Problem

The carrier aggregation function in existing systems requires scheduling data resources for each of the aggregated component carriers, leading to significant overhead in resource allocation.

Innovation Solution

Implementing a terminal with a communication unit for uplink or downlink communication in a frequency band aggregated by carrier aggregation, and a control unit that controls transmit power of uplink control signals across multiple component carriers using different scheduling units, such as virtual component carriers, actual component carriers, or groups of actual carriers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If data resources are scheduled for each aggregated component carrier, then resource allocation flexibility is improved, but resource allocation overhead increases

Engineering Contradiction:

Improveresource allocation flexibilityVSAvoidresource allocation overhead

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges the scheduling of multiple component carriers into a single scheduling unit. Instead of scheduling each component carrier separately, the base station schedules a set of component carriers together as one unit, thereby reducing the number of scheduling operations and associated overhead while maintaining the flexibility to allocate resources across the aggregated carriers.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The scheduling mechanism is designed to handle multiple component carriers simultaneously through a universal scheduling approach. The base station uses a unified scheduling procedure that can accommodate any number of component carriers in the aggregation, making the system more efficient and reducing overhead compared to individual carrier scheduling.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Manufacturing precision

If separate scheduling is performed for each component carrier, then carrier-specific resource optimization is improved, but system overhead increases

Engineering Contradiction:

Improvecarrier-specific resource optimizationVSAvoidsystem overhead

Core Design Contradiction:

Manufacturing precisionVSQuantity of substance

Solution Approach 1:

The patent combines multiple carrier scheduling operations into a single unified scheduling process. The base station schedules resources for multiple component carriers simultaneously in one operation, which reduces the total number of scheduling messages and overhead while still allowing for carrier-specific resource allocation decisions to be made within the unified framework.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250247192A1Terminal, base station and communication method

Publication Date: 2025.07.31 NTT DOCOMO INC

AI summary

A terminal includes: a communication unit that performs uplink or downlink communication in a frequency band aggregated by carrier aggregation; and a control unit that controls transmit power of an uplink control signal on a plurality of component carriers in a case where scheduling is performed in units including the plurality of component carriers in the aggregated frequency band.