User Terminal Synchronization Signal Resource Specification
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Solution Overview
Problem
In next-generation radio communication systems like 5G, existing radio communication schemes face challenges in efficiently utilizing broadband frequency spectra for high-speed, low-delay communications, especially with a large number of devices connected simultaneously, leading to potential deterioration in frequency usage efficiency and communication delay.
Innovation Solution
A user terminal and radio base station configuration that uses a synchronization signal to specify radio resources and communication parameters for a new radio access scheme, allowing for optimal communication by determining numerologies used in transmission, such as subcarrier spacing and symbol length, which can be explicitly or implicitly provided through synchronization and broadcast channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing radio communication schemes are used in next-generation systems, then device compatibility is maintained, but frequency usage efficiency deteriorates and communication delay increases
Solution Approach 1:
The patent applies parameter changes by introducing new radio access scheme parameters (numerologies) including subcarrier spacing and symbol length that differ from existing schemes. The base station configures and notifies the user terminal of these specific parameters through RRC signaling, enabling the terminal to adjust its reception settings accordingly. This allows the system to optimize frequency usage efficiency and reduce communication delay while maintaining compatibility through proper parameter configuration and notification mechanisms.
2Reliability
If existing radio communication schemes are used in next-generation systems, then device compatibility is maintained, but communication delay increases
Solution Approach 1:
The patent reduces communication delay by changing key radio access parameters including subcarrier spacing and symbol length. By configuring the user terminal with optimized parameters through RRC signaling and enabling the terminal to adjust its reception timing accordingly, the system achieves lower latency communication while maintaining device compatibility through standardized parameter notification procedures.
3Productivity
If synchronization signals are used to specify radio resources and communication parameters, then frequency usage efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by having the base station pre-configure and notify the user terminal of radio access scheme parameters including subcarrier spacing and symbol length through RRC signaling before actual data transmission. This allows the terminal to prepare its reception settings in advance, reducing processing complexity during active communication while enabling efficient frequency usage through optimized parameter selection.
Solution Approach 2:
The patent uses RRC signaling as an intermediary mechanism to transfer parameter information from the base station to the user terminal. This intermediary layer handles the complexity of parameter configuration and notification, shielding the terminal from direct complexity while enabling efficient frequency usage through properly configured parameters.
Data Source
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Figure 3A~3B
AI summary
In order to realize appropriate communications in a next-generation communication system, the present invention provides a user terminal having: a reception section that receives a synchronization signal and broadcast signals; and a control section that uses the synchronization signal as a basis to specify a radio resource and/or a communication parameter of a radio access scheme used for transmission of at least one of the broadcast signals.