Base Station Spatial Relation Information Management for 5G Carrier Aggregation
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Solution Overview
Problem
In 5G communication systems, the implementation of carrier aggregation leads to an increase in overhead, making it challenging to achieve efficient beamforming and stabilize communication quality while improving frequency efficiency and throughput.
Innovation Solution
A base station apparatus and terminal apparatus configuration that transmits spatial relation information in the uplink signal using a second component carrier, which includes information about the first component carrier, allowing for efficient beamforming and synchronization, thereby reducing overhead and enhancing communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is implemented to expand frequency bandwidth, then transmission speed is improved, but overhead increases
Solution Approach 1:
The patent merges spatial relation information configuration from multiple component carriers into a unified configuration. Specifically, spatial relation information for uplink signals on the second component carrier includes references to downlink signals from the first component carrier, allowing shared beamforming configurations across carriers and reducing redundant overhead
Solution Approach 2:
The patent creates universal spatial relation information that can be applied across multiple component carriers. The spatial domain transmission filter configured for one carrier can be reused for uplink signals on another carrier, making the beamforming configuration multi-functional and reducing the need for separate configurations
2Reliability
If beamforming is configured for each component carrier, then communication quality is stabilized, but device complexity increases
Solution Approach 1:
The patent combines beamforming configuration management across multiple component carriers into a unified process. The base station apparatus manages spatial relation information that spans multiple carriers, reducing the complexity of managing separate beamforming configurations while maintaining communication quality through coordinated multi-carrier beamforming
3Productivity
If spatial relation information is transmitted for each component carrier, then beamforming efficiency is improved, but overhead increases
Solution Approach 1:
The patent performs preliminary configuration of spatial relation information that can be reused across component carriers. By pre-configuring spatial domain transmission filters and associating them with downlink signals from different carriers, the system avoids redundant configuration transmissions and reduces overhead while maintaining beamforming efficiency
Solution Approach 2:
The patent uses copying of spatial relation information across component carriers. Spatial domain transmission filters configured for one carrier are copied and applied to uplink signals on other carriers, reducing the need to transmit identical configuration information multiple times while maintaining beamforming performance
Data Source
AI summary
A base station apparatus according to the present invention includes a transmitter configured to transmit a downlink signal by using a first component carrier and a second component carrier, and a receiver configured to receive an uplink signal transmitted by the terminal apparatus by using at least the second component carrier. The transmitter transmits spatial relation information in the uplink signal, the spatial relation information is information indicating a spatial domain transmission filter for transmitting the uplink signal, and the spatial relation information in the second component carrier includes information indicating the first component carrier.