Terminal Synchronization via OFDM Symbol Group Segmentation
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Solution Overview
Problem
In the context of 5th generation cellular systems, existing technologies face challenges in efficiently establishing synchronization between terminal apparatuses and base station apparatuses, particularly in wide coverage areas with high-frequency attenuation, where beamforming is used to configure multiple regions within a cell.
Innovation Solution
A terminal apparatus and base station apparatus implementation that includes a receiver and transmitter configured to receive and transmit synchronization signals and physical broadcast channels within OFDM symbol groups, with a predefined maximum number of OFDM symbol groups and reference subcarrier spacing, allowing efficient synchronization and communication initiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If beamforming is used to configure multiple regions within a cell to widen coverage in high-frequency environments, then coverage area is improved, but device complexity increases due to sequential signal transmission requirements
Solution Approach 1:
The patent segments the time resource into multiple OFDM symbol groups within a periodic time resource allocation. By dividing the transmission time into discrete symbol groups with a predefined maximum number, the system can efficiently manage beamforming signals for multiple regions without requiring complex continuous control mechanisms, thus resolving the contradiction between coverage area expansion and device complexity
Solution Approach 2:
The patent implements periodic time resource allocation for synchronization signal transmission. The time resource is allocated periodically with a predefined maximum number of OFDM symbol groups, allowing the system to reuse transmission patterns across multiple periods. This periodic structure simplifies the device complexity by establishing regular transmission intervals while maintaining wide coverage through beamforming across multiple regions
2Reliability
If multiple OFDM symbol groups are configured for synchronization signal transmission, then synchronization reliability is improved, but time resource consumption increases
Solution Approach 1:
The patent applies partial action by configuring a maximum number of OFDM symbol groups for synchronization signal transmission rather than using all available time resources. This predefined limit ensures sufficient synchronization reliability through multiple transmission opportunities while avoiding excessive time resource consumption by capping the number of symbol groups used
Solution Approach 2:
The patent changes the parameter of time resource allocation by defining a maximum number of OFDM symbol groups within periodic time resources. This parameter adjustment allows the system to optimize between synchronization reliability and time resource consumption by controlling the density and frequency of synchronization signal transmissions across the OFDM symbol groups
Data Source
AI summary
To provide a terminal apparatus including a receiver configured to receive, in a time resource including a plurality of OFDM symbol groups, a synchronization signal included in each of the plurality of OFDM symbol groups, a synchronization unit configured to determine a position of a first synchronization signal that is one of the synchronization signals, and a detection unit configured to receive, based on the first synchronization signal, a physical broadcast channel. The time resource is periodically allocated, and a maximum number of the plurality of OFDM symbol groups in which the synchronization signal included in the time resource is possibly transmitted is predefined.