Synchronization Signal Reception in Ultrahigh Frequency Wireless Systems
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Solution Overview
Problem
In ultrahigh frequency wireless communication systems, the Doppler effect and carrier frequency offset (CFO) pose challenges for synchronization signal transmission and reception, leading to inefficiencies in beam scanning and increased implementation complexity for user equipment.
Innovation Solution
A method for user equipment to efficiently receive synchronization signals by categorizing base stations based on parameters such as cell properties, synchronization signal properties, and beam scanning signal properties, allowing for accurate estimation of repetition counts and sequence numbers, and performing beam scanning accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If synchronization signal is transmitted in ultrahigh frequency band, then communication capacity is improved, but Doppler effect and carrier frequency offset increase causing synchronization difficulty
Solution Approach 1:
The base station is categorized into multiple types (first type and second type) based on cell radius and transmit power parameters. This segmentation allows the system to handle different synchronization scenarios with appropriate strategies, improving overall synchronization reliability in ultrahigh frequency bands while maintaining high communication capacity.
Solution Approach 2:
The invention changes key parameters such as synchronization signal repetition count and beam scanning configuration based on base station type. First type base stations (larger cell radius, higher transmit power) use different synchronization parameters compared to second type base stations, enabling adaptive optimization of synchronization accuracy for different coverage scenarios.
2Productivity
If base station types are categorized and beam scanning is performed accordingly, then synchronization signal reception efficiency is improved, but implementation complexity increases
Solution Approach 1:
The base station types are pre-categorized based on cell radius and transmit power parameters before synchronization signal transmission. User equipment is provided with type information in advance, allowing it to prepare appropriate reception and beam scanning configurations beforehand. This preliminary classification simplifies the actual synchronization process and reduces real-time decision complexity.
Solution Approach 2:
The invention implements dynamic beam scanning where the beam scanning signal configuration adapts based on the identified base station type. The system dynamically adjusts beam scanning parameters such as number of beams and scanning pattern according to whether the base station is first type or second type, optimizing reception efficiency while managing complexity through type-based rules.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach improves the efficiency of synchronization signal reception and beam scanning in ultrahigh frequency bands, reduces implementation complexity, and enhances the accuracy of base station identification for user equipment.
Implementation Method 1
Doppler effect generated by movement of a UE or carrier frequency offset (CFO) generated by a difference in oscillators between a UE and a BS occurs more seriously due to the characteristic of the center frequency configured at an ultrahigh frequency
Data Source
AI summary
Disclosed are a method and a terminal for receiving a synchronization signal configured to: obtain information on a plurality of base station types in which a plurality of base stations are classified according to predetermined parameters; receive a synchronization signal from a base station of a cell where the terminal is positioned; estimate the number of repetitions of the synchronization signal and a band to which a sequence number of the synchronization signal belongs: select, using the estimation results, the base station type of a base station from which the synchronization signal was transmitted, from among the plurality of base station types; and perform a beam scanning process by considering the selected base station type.