Carrier Pairing for Wireless Multi-Carrier Communication

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Solution Overview

Problem

In multi-carrier wireless communication systems, the overhead of control information increases due to the need to separately configure downlink and uplink carriers, especially when changing carriers, which hampers efficient data transmission.

Innovation Solution

A method that allows implicit reconfiguration of carriers by transmitting pairing information, enabling the User Equipment (UE) to determine corresponding carriers without explicit configuration instructions from the base station, thereby reducing the need for extensive control information transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If downlink and uplink carriers are separately configured in a multi-carrier system, then carrier flexibility and adaptability are improved, but control information overhead increases

Engineering Contradiction:

Improvecarrier configuration flexibilityVSAvoidcontrol information overhead

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent extracts only the essential pairing relationship information between downlink and uplink carriers, rather than transmitting complete configuration information for both carriers. By taking out only the necessary pairing indication, the system reduces control overhead while maintaining the ability to flexibly configure carriers.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The pairing information serves multiple functions: it indicates the mapping relationship between downlink and uplink carriers, enables implicit configuration of uplink carriers based on downlink carriers, and reduces signaling overhead. This multi-functional approach allows a single piece of information to achieve multiple configuration goals.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If complete carrier configuration information is transmitted explicitly, then configuration accuracy and reliability are improved, but transmission overhead and system complexity increase

Engineering Contradiction:

Improveconfiguration accuracyVSAvoidcontrol information processing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system enables user equipment to automatically determine uplink carrier configuration based on received downlink carrier pairing information, without requiring explicit configuration instructions for uplink carriers. This self-service approach reduces network signaling overhead and simplifies the configuration process while maintaining reliability.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent establishes pairing relationships between downlink and uplink carriers in advance, so that when downlink carrier configuration is provided, the corresponding uplink carrier can be automatically determined without additional configuration steps. This preliminary pairing setup ensures reliable configuration while reducing real-time processing complexity.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP2244409B1Method for pairing carriers in a wireless multi-carrier communication system

Publication Date: 2019.06.26 LG ELECTRONICS INC

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AI summary

A method of a User Equipment (UE) performing wireless communication using multiple carriers comprises accessing a first carrier (S120) used for first link transmission, configuring a second carrier (S130) used for second link transmission, and performing the wireless communication using the second carrier. The second carrier is determined based on the first carrier.