Carrier Aggregation on Unlicensed Bands via Primary Carrier Selection
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Solution Overview
Problem
Existing carrier aggregation technologies in wireless communication face challenges such as poor effect and failure in implementing carrier aggregation, primarily due to limitations in available frequency bands.
Innovation Solution
The method involves determining a primary carrier for performing carrier aggregation on an unlicensed frequency band and triggering the implementation of carrier aggregation on this primary carrier, thereby expanding the frequency bands available for aggregation and improving the efficiency of carrier aggregation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is implemented only on licensed frequency bands, then the system maintains stable and reliable operation, but the transmission rate and communication capacity are limited
Solution Approach 1:
The patent applies universality by enabling carrier aggregation functionality across both licensed and unlicensed frequency bands. The base station and terminal are configured to perform carrier aggregation on multiple types of frequency bands, making the system multi-functional and not restricted to a single band type, thereby improving transmission rate while expanding frequency band availability.
Solution Approach 2:
The patent extends carrier aggregation from the traditional licensed frequency band dimension to include the unlicensed frequency band dimension. This dimensional expansion allows the system to utilize additional spectrum resources (2.4GHz and 5GHz unlicensed bands) beyond the conventional licensed bands, effectively increasing communication capacity without compromising stable operation.
2Adaptability or versatility
If carrier aggregation is attempted on unlicensed frequency bands without a primary carrier determination mechanism, then frequency band availability increases, but the carrier aggregation implementation fails due to lack of coordination
Solution Approach 1:
The patent segments the carrier aggregation process by designating one unlicensed carrier as the primary carrier and others as secondary carriers. This segmentation provides a hierarchical structure that organizes the multiple unlicensed carriers, enabling coordinated operation and reliable implementation while maintaining expanded frequency band availability.
Solution Approach 2:
The primary carrier acts as an intermediary among the multiple unlicensed carriers. It coordinates the operations of secondary carriers, manages uplink-downlink configurations, and ensures synchronized transmission. This intermediary role resolves coordination issues and ensures reliable carrier aggregation implementation across unlicensed bands.
3Productivity
If multiple unlicensed carriers are aggregated without primary carrier coordination, then communication capacity increases, but transmission reliability deteriorates due to synchronization issues
Solution Approach 1:
The patent implements feedback mechanisms where the primary carrier monitors and coordinates the transmission activities of secondary carriers. The base station configures the terminal with uplink-downlink configuration information for each carrier, and the terminal provides feedback on channel conditions and transmission status, enabling the primary carrier to adjust coordination parameters and maintain synchronization, thus ensuring transmission reliability while maximizing communication capacity.
Data Source
AI summary
Examples of the present application disclose a method and device for carrier aggregation, a communication apparatus, and a storage medium. The method for carrier aggregation comprises: determining a main carrier for performing carrier aggregation on an unlicensed frequency band; and triggering the implementation of carrier aggregation on the main carrier.