Initial Access Channel Layout for Single-Beam mmWave Terminals
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Solution Overview
Problem
The challenge of performing initial access in wireless communication systems using higher frequency bands, such as 52.6 GHz to 71 GHz, where larger SCS and more beams are required, necessitates efficient arrangements of synchronization signals, control signals, and system information for radio resource allocation.
Innovation Solution
A terminal is equipped with a reception unit to receive synchronization signals, control channels, and shared channels using single beamforming, with frequency- and time-multiplexing of control and shared channels to facilitate initial access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If higher frequency bands (52.6 GHz to 71 GHz) are used for wireless communication, then data transmission rate and capacity are improved, but beam switching complexity and initial access difficulty increase
Solution Approach 1:
The patent applies preliminary action by performing beam alignment and synchronization signal reception before actual data transmission. The terminal device receives synchronization signals and control information in advance to establish beam directions and configure reception parameters, thereby simplifying subsequent data transmission operations at high frequencies.
Solution Approach 2:
The patent segments the initial access process into distinct phases: synchronization signal reception, control information decoding, and data transmission. This segmentation allows each phase to be optimized independently, reducing overall complexity while maintaining high data transmission rates.
2Productivity
If larger SCS and greater number of beams are used in higher frequency bands, then system capacity and data rate are improved, but initial access complexity and resource arrangement difficulty increase
Solution Approach 1:
The patent utilizes frequency-time dimensionality by frequency-multiplexing synchronization signals and control information onto the shared channel. This dimensional approach allows multiple signals to coexist without interfering with each other, simplifying the arrangement of resources while supporting larger SCS and more beams for enhanced system capacity.
Solution Approach 2:
The shared channel is designed to serve multiple functions: carrying data, synchronization signals, and control information. This multi-functionality reduces the need for separate dedicated channels, thereby simplifying initial access procedures while maintaining high system capacity through multiple beams and larger SCS.
3Adaptability or versatility
If synchronization signals and system information are arranged for high frequency deployment, then initial access capability is improved, but resource allocation complexity increases
Solution Approach 1:
The patent merges synchronization signals, control information, and data transmission onto a single shared channel using frequency-multiplexing. This consolidation simplifies resource allocation by reducing the number of separate channel configurations needed, while still providing robust initial access capability across different frequency bands and beam configurations.
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
Enables effective initial access in wireless communication systems by optimizing the arrangement of synchronization signals and system information, reducing latency and beam switching requirements.
Implementation Method 1
a reception unit configured to receive a block including a synchronization signal and a broadcast channel, a control channel carrying control information, and a shared channel carrying system information by applying single beamforming
Data Source
AI summary
A terminal includes: a reception unit configured to receive a block including a synchronization signal and a broadcast channel, a control channel carrying control information, and a shared channel carrying system information by applying single beamforming; and a control unit configured to perform an initial access, based on the system information. The block and one or both of the control channel and the shared channel are frequency-multiplexed, and the control channel and the shared channel are time-multiplexed.