Synchronization Signal Block Transmission Window Configuration for 5G Interference Management
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Solution Overview
Problem
In high-density base station deployments for 5G communication systems, beamforming improves signal quality but increases interference power, leading to a decrease in the signal-to-noise plus noise power ratio for users.
Innovation Solution
A base station apparatus and communication method that configures synchronization signal blocks with quasi-co-located transmission windows, allowing for appropriate beamforming while reducing interference power by notifying terminal apparatuses of information associated with Quasi Co-located (QCL) synchronization signal blocks and adjusting the size and periodicity of transmission windows based on priority and cell identity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beamforming is used to improve signal quality in high frequency band communication, then signal quality is improved, but interference power given to other communication apparatuses increases
Solution Approach 1:
The patent applies periodic action by configuring synchronization signal blocks to be transmitted in periodic transmission windows rather than continuously. The base station transmits synchronization signal blocks at specific periodic intervals defined by transmission window configurations (periodicity, offset, duration), allowing other base stations to predict and avoid transmitting in these windows, thereby reducing interference while maintaining signal quality through beamforming.
2Productivity
If the density of base station apparatuses is increased to improve frequency efficiency, then frequency efficiency is improved, but the reception signal to noise plus interference power ratio of users decreases due to increased interference
Solution Approach 1:
The patent resolves this contradiction by implementing periodic transmission windows for synchronization signal blocks across multiple base stations. By coordinating transmission timing through window configurations (periodicity, offset, duration), the system allows high base station density for improved frequency efficiency while reducing interference through time-division multiplexing, where base stations take turns transmitting in synchronized periodic windows.
Solution Approach 2:
The patent applies preliminary action by pre-configuring transmission window parameters (periodicity, offset, duration) for synchronization signal blocks before actual transmission. This allows base stations to advance-plan their transmission schedules, ensuring that even in high-density deployments, interference is minimized through pre-coordinated time-division multiplexing while maintaining high frequency efficiency.
3Adaptability or versatility
If multiple synchronization signal blocks are transmitted to support beamforming, then beamforming capability is improved, but interference power increases
Solution Approach 1:
The patent applies periodic action by transmitting multiple synchronization signal blocks for beamforming within periodic transmission windows rather than continuously. The beamforming capability is maintained through multiple blocks per window for channel estimation and beam selection, while the periodic window structure allows interference management through coordinated scheduling across base stations.
Solution Approach 2:
The patent applies dynamics by making the transmission window configuration adjustable and adaptable. The base station can dynamically configure window parameters (periodicity, offset, duration, number of blocks) based on channel conditions, traffic load, and interference levels, allowing flexible optimization of beamforming performance while managing interference in different operational scenarios.
Data Source
AI summary
A base station apparatus provided with a function of performing communication using multiple beams implements appropriate beamforming while reducing interference power, thereby communication quality becomes stable and frequency efficiency or throughput is improved. The base station apparatus according to the present invention is a base station apparatus for communicating with a terminal apparatus, the base station apparatus including: a transmitter configured to transmit a synchronization signal block including a synchronization signal in a prescribed transmission window; and a controller configured to configure a size of the prescribed transmission window in which the synchronization signal block is transmitted, in which the transmitter notifies the terminal apparatus of information associated with QCL between two of the synchronization signal blocks transmitted in the prescribed transmission window.