Uplink Carrier Scheduling via Intermediary Coordination

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Solution Overview

Problem

In LTE systems, carrier aggregation for uplink transmission faces challenges due to differences in carrier-specific pathloss, channel conditions, and reception signal quality, leading to inefficient resource allocation and power control, which affects the uplink data rate and resource utilization efficiency.

Innovation Solution

A method for exchanging scheduling-related information among independent single-uplink carrier schedulers to perform per-carrier resource allocation and power control, allowing for efficient traffic distribution across multiple cells.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If carrier aggregation is used for uplink transmission, then data rate increases, but resource allocation efficiency deteriorates due to carrier-specific pathloss and channel condition differences

Engineering Contradiction:
Improveuplink data rateVSAvoidresource allocation complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent divides the uplink transmission system into multiple independent single-uplink carrier schedulers, each responsible for a specific carrier. This segmentation allows each scheduler to independently manage resource allocation and power control for its assigned carrier, adapting to carrier-specific channel conditions without affecting other carriers, thereby resolving the contradiction between increased data rate and resource allocation efficiency

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent implements per-carrier resource allocation and power control mechanisms where each scheduler tailors resource distribution and power levels to the specific channel conditions, pathloss characteristics, and traffic requirements of its assigned carrier. This local optimization ensures that each carrier operates at peak efficiency despite heterogeneous conditions across the aggregated carriers

Inventive Principle:
Principle #3Local quality

2Productivity

If independent single-uplink carrier schedulers are used, then per-carrier resource allocation efficiency improves, but information exchange complexity increases

Engineering Contradiction:
Improveresource utilization efficiencyVSAvoidinformation exchange complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent introduces a centralized scheduling information generation device that acts as an intermediary between multiple independent single-uplink carrier schedulers. This mediator collects scheduling-related information from each scheduler, processes it centrally considering overall system conditions, and distributes optimized scheduling decisions back to the individual schedulers. This intermediary mechanism enables efficient information exchange and coordinated resource allocation while maintaining the benefits of per-carrier independent scheduling

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The centralized scheduling information generation device performs multiple functions: collecting information from various carriers, analyzing system-wide conditions, generating coordinated scheduling decisions, and distributing instructions to individual schedulers. This multi-functional intermediary simplifies the information exchange architecture by providing a single point of coordination rather than requiring direct peer-to-peer communication between all schedulers

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Productivity

If per-carrier power control is implemented, then uplink transmission efficiency improves, but power control complexity increases

Engineering Contradiction:
Improveuplink transmission efficiencyVSAvoidpower control complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent divides power control into independent per-carrier processes, with each single-uplink carrier scheduler managing power allocation for its assigned carrier based on that carrier's specific pathloss, channel quality, and traffic load. This segmentation eliminates the need for complex joint power optimization across all carriers while maintaining optimal power distribution for each individual carrier

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent implements feedback mechanisms where each scheduler monitors uplink transmission performance, channel conditions, and power utilization on its assigned carrier, and adjusts power allocation dynamically based on this feedback. The centralized scheduling information generation device also collects power control information from all carriers and coordinates power distribution to ensure overall system efficiency while respecting carrier-specific conditions

Inventive Principle:
Principle #23Feedback

Data Source

PatentUS10624116B2Method and apparatus for scheduling terminal in wireless communication system
Publication Date: 2020.04.14 SAMSUNG ELECTRONICS CO LTD
  • US10624116B2 patent drawing
  • US10624116B2 patent drawing
  • US10624116B2 patent drawing

AI summary

The present disclosure relates to a 4G communication system such as LTE and a 5G or pre-5G communication system for supporting a higher data rate after a 4G communication system. The present invention relates to a method for generating scheduling-related information comprising the steps of: receiving first reference information; receiving second reference information; generating first scheduling-related information using the received first reference information and second reference information, and generating second scheduling-related information by considering the first scheduling-related information; and sending the first scheduling-related information to a first cell and sending the second scheduling-related information to a second cell.