Carrier Aggregation Configuring FDD and TDD Component Carriers
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in efficiently performing carrier aggregation across different duplex modes (FDD and TDD) to optimize resource allocation and reduce interference, while maintaining effective communication.
Innovation Solution
A method and apparatus for wireless communication systems that configure and transceive signals using primary and secondary component carriers in both FDD and TDD modes, allowing for flexible allocation of radio resources and virtual bandwidth configurations to manage load changes and mitigate interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If carrier aggregation is performed across FDD and TDD modes, then resource allocation flexibility and bandwidth utilization are improved, but system complexity and interference management difficulty increase
Solution Approach 1:
The patent segments the carrier aggregation configuration into separate FDD and TDD component carrier groups, each with independent uplink-downlink configurations. This allows the system to handle different duplex modes independently while maintaining overall carrier aggregation functionality, thereby managing complexity through modular configuration management.
Solution Approach 2:
The patent creates a universal carrier aggregation framework that can simultaneously support both FDD and TDD modes. The base station and user equipment are configured to handle multiple component carriers with different duplex modes through a unified resource allocation mechanism, enabling the system to adapt to various deployment scenarios without requiring separate systems for each mode.
2Quantity of substance
If multiple component carriers with different duplex modes are aggregated, then available bandwidth and data rate are improved, but interference between base stations increases
Solution Approach 1:
The patent applies local quality by assigning specific uplink-downlink configurations to TDD component carriers based on their geographic location and traffic patterns. Different TDD component carriers can have different uplink-downlink ratios, allowing the system to optimize for local conditions while minimizing interference to neighboring base stations with different configurations.
Solution Approach 2:
The patent enables dynamic adjustment of uplink-downlink configurations for TDD component carriers based on real-time traffic demands and interference conditions. The base station can reconfigure the timing and frequency resources of aggregated carriers to adapt to changing network conditions, thereby managing interference while maintaining high bandwidth utilization.
3Productivity
If FDD and TDD component carriers are aggregated, then service capacity and user experience are improved, but configuration management and signaling overhead increase
Solution Approach 1:
The patent extracts the duplex mode configuration information from the general carrier aggregation setup and handles it through specialized configuration procedures. By separating the configuration management of FDD and TDD component carriers, the system reduces signaling overhead by avoiding redundant transmission of mode-specific parameters and enabling more efficient resource allocation.
Data Source
AI summary
The present invention relates to a method of transmitting/receiving a signal by a UE in a wireless communication system supporting carrier aggregation. The method includes the steps of: receiving a configuration for aggregating a component carrier in a frequency division duplex (FDD) mode and a component carrier in a time division duplex (TDD) mode; and transmitting/receiving a signal using a primary component carrier and a secondary component carrier determined according to the configuration, wherein the primary component carrier and the secondary component carrier support different modes.