5G Terminal Synchronization Signal Detection for Fast Initial Access
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Solution Overview
Problem
The existing 5G communication systems face challenges in reducing the time required for a terminal to initially access the network, particularly due to the complexity in detecting and utilizing synchronization signals for cell measurement and rate matching in a multi-frequency band environment.
Innovation Solution
A method and device for a terminal that detects synchronization signals, identifies those within its operating frequency band, and stores frequency/time location information for efficient cell measurement and rate matching, allowing for faster initial access by utilizing previously stored information and information received from the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal performs comprehensive detection of synchronization signals across all frequency bands, then the reliability of cell measurement and rate matching is improved, but the time required for initial access increases
Solution Approach 1:
The base station performs preliminary action by transmitting synchronization signal frequency band information before the terminal performs comprehensive detection. The terminal uses this pre-provided information to directly identify which frequency bands contain synchronization signals, avoiding unnecessary detection in bands without signals. This preliminary information provision resolves the contradiction by maintaining reliable cell measurement and rate matching while significantly reducing the time required for initial access.
2Loss of information
If the terminal detects and processes synchronization signals in all frequency bands, then the completeness of system information is improved, but the complexity of the access procedure increases
Solution Approach 1:
The base station extracts and provides only the relevant synchronization signal frequency band information to the terminal, rather than requiring the terminal to process all frequency bands. This extraction of essential information reduces the access procedure complexity while maintaining completeness of system information, as the terminal receives targeted guidance on where to find synchronization signals without needing to perform exhaustive searches across the entire frequency spectrum.
3Measurement precision
If the terminal performs full frequency band scanning for synchronization signals, then the accuracy of frequency location identification is improved, but the speed of initial access decreases
Solution Approach 1:
The base station acts as an intermediary by providing synchronization signal frequency band information to the terminal. This intermediary provision of accurate frequency location information allows the terminal to quickly jump to the correct frequency bands for detection without performing full-band scanning. The base station's information provision mediates between the need for accurate frequency location identification and the requirement for fast initial access speed, resolving the contradiction effectively.
Data Source
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AI summary
The present disclosure relates to a communication technique for converging a 5G communication system for supporting a higher data transfer rate beyond a 4G system with an IoT technology, and a system therefor. The present disclosure may be applied to intelligent services (for example, smart home, smart buildings, smart cities, smart cars or connected cars, health care, digital educations, retail business, security and safety-related services, etc.) on the basis of a 5G communication technology and an IoT-related technology. The communication method for a terminal according to one embodiment of the present invention may comprise the steps of: detecting at least one synchronization signal; determining whether the at least one detected synchronization signal belongs to an operating frequency band for a terminal; and storing information relating to the at least one synchronization signal which has been determined as belonging to the operating frequency band for the terminal.