NR-Light Terminal Periodicity Tuning for Initial Access
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Solution Overview
Problem
In future radio communication systems, devices with relaxed capabilities (NR-Light devices) face challenges in performing initial access due to reduced bandwidth and antenna numbers, leading to potential degradation in system performance such as reduced throughput.
Innovation Solution
A terminal with a control section that adjusts periodicities for synchronization signal blocks, control resource sets, and system information blocks, and a receiving section that performs reception based on these adjusted periodicities, allowing appropriate initial access for devices with wider bandwidths and more antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal uses the standard periodicity defined in Rel. 15 for synchronization signal blocks and system information blocks, then full-featured terminals can maintain proper communication, but NR-Light terminals with reduced bandwidth and antenna capabilities cannot perform initial access appropriately
Solution Approach 1:
The patent applies dynamics by making the periodicity configurable rather than fixed. The base station can dynamically adjust the periodicity of synchronization signal blocks and system information blocks based on terminal capabilities. NR-Light terminals can be configured with extended periodicities (e.g., 40ms, 80ms) while full-featured terminals use standard periodicities, allowing the system to adapt to different terminal types without compromising initial access reliability for either group
Solution Approach 2:
The patent changes the periodicity parameter to resolve the contradiction. By allowing the periodicity of synchronization signal blocks and system information blocks to vary based on terminal capabilities, the system can optimize for NR-Light terminals with reduced bandwidth and antenna capabilities while maintaining compatibility with full-featured terminals. This parameter adjustment enables appropriate initial access for different terminal types
2Device complexity
If the bandwidth and antenna number are reduced for NR-Light terminals, then device complexity and cost decrease, but initial access performance and system throughput are degraded
Solution Approach 1:
The patent changes temporal parameters (periodicity) to compensate for reduced spatial parameters (bandwidth, antennas). By extending the periodicity of synchronization signal blocks and system information blocks, NR-Light terminals are given more time to acquire necessary information, compensating for their reduced bandwidth and antenna capabilities. This maintains system throughput by ensuring reliable initial access despite hardware limitations
Solution Approach 2:
The patent applies dynamics by allowing the system to adapt its operation mode based on terminal capabilities. For NR-Light terminals, the system dynamically uses extended periodicities and adjusted configuration parameters during initial access, while full-featured terminals use standard configurations. This dynamic adaptation maintains overall system productivity by optimizing for each terminal type's capabilities
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes a control section that determines a periodicity different from a second periodicity of at least one of a synchronization signal block, a control resource set (CORESET) 0, a physical downlink shared channel for carrying a system information block 1, an update of a physical broadcast channel in the synchronization signal block, and an update of the system information block 1, for a second terminal, the second terminal having at least one of a second bandwidth wider than a bandwidth of the terminal and a second number of antennas greater than the number of antennas of the terminal, and a receiving section that performs reception based on the periodicity. According to one aspect of the present disclosure, initial access can be appropriately performed.