Terminal Scheduling Across Component Carriers to Reduce Overhead

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Solution Overview

Problem

Conventional carrier aggregation in wireless communication systems results in high resource allocation overhead due to the necessity of scheduling data resources for each of the bundled component carriers.

Innovation Solution

Implementing a terminal with a communication unit for uplink or downlink communication using carrier aggregation and a control unit that allows out-of-order scheduling based on a unit including multiple component carriers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional carrier aggregation schedules data resources for each component carrier separately, then data transmission capacity is improved, but resource allocation overhead increases

Engineering Contradiction:

Improvedata transmission capacityVSAvoidresource allocation overhead

Core Design Contradiction:

ProductivityVSDevice 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 creates a unified scheduling structure that handles multiple carriers simultaneously, thereby reducing the overhead associated with repeated scheduling operations while maintaining the aggregated data transmission capacity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The scheduling unit is designed with multi-functionality to handle multiple component carriers within a single scheduling operation. This universal scheduling mechanism can accommodate different component carriers with varying configurations, enabling flexible resource allocation across the aggregated carriers without requiring separate scheduling procedures for each carrier.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Device complexity

If scheduling is performed according to a unit including multiple component carriers, then resource allocation overhead is reduced, but scheduling flexibility is constrained

Engineering Contradiction:

Improveresource allocation overheadVSAvoidscheduling flexibility

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The scheduling unit incorporates dynamic adjustment capabilities that allow it to adapt to different carrier configurations and requirements. The system can dynamically reconfigure the scheduling parameters and resource allocation based on real-time conditions of individual component carriers, maintaining flexibility despite the unified scheduling approach.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

While maintaining a unified scheduling structure, the patent applies local quality adjustments for each component carrier within the scheduling unit. Each carrier can have its specific quality requirements (such as priority, resource allocation ratio, or timing) individually tailored within the overall scheduling framework, allowing flexible adaptation to different carrier characteristics without increasing overall scheduling complexity.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20250274235A1Terminal, base station and communication method

Publication Date: 2025.08.28 NTT DOCOMO INC

AI summary

A terminal includes: a communication unit configured to perform an uplink or downlink communication by using a frequency band in which aggregation is performed by carrier aggregation; and a control unit configured to expect scheduling that is defined as out-of-order scheduling in a case where scheduling is performed according to a unit including a plurality of component carriers in the aggregated frequency band.