5G PRB Grid Location Indication Across Subcarrier Spacings
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Solution Overview
Problem
The 5G new radio system lacks a method for a terminal device to obtain a PRB location in a system common PRB grid, and it has not defined structures of system common PRB grids corresponding to different subcarrier spacings in different system bandwidths.
Innovation Solution
A PRB grid indication method where a terminal device receives location information from a network device, which indicates the relative location relationship between a predetermined location in a synchronization signal block PRB grid and any PRB in a system common PRB grid with a specific subcarrier spacing, allowing the terminal device to determine the location of PRBs in the system common PRB grid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the 5G new radio defines a synchronization signal block PRB grid structure, then the terminal device can obtain synchronization signal information, but the terminal device cannot obtain PRB location in system common PRB grid
Solution Approach 1:
The patent introduces location information as an intermediary element that bridges the synchronization signal block PRB grid and the system common PRB grid. This location information, transmitted via broadcast message, serves as a mediator that enables the terminal device to derive PRB locations in the system common grid without directly defining complex grid structures in the synchronization signal block itself.
Solution Approach 2:
The patent applies preliminary action by pre-defining the relationship between synchronization signal block PRB grids and system common PRB grids through location information. The network device prepares and transmits this location information in advance via broadcast messages, allowing terminal devices to independently determine PRB locations without requiring complex real-time calculations or direct grid definitions.
2Adaptability or versatility
If the system defines PRB grids for different subcarrier spacings and bandwidths, then resource allocation flexibility improves, but the complexity of defining and managing multiple grid structures increases
Solution Approach 1:
The patent makes the location information mechanism universal by designing it to work across different subcarrier spacings (15 kHz, 30 kHz, 60 kHz) and system bandwidths. The same basic approach of transmitting location information via broadcast messages applies universally, while the specific grid parameters adapt to different configurations, reducing the need for separate mechanisms for each scenario.
Solution Approach 2:
The patent utilizes parameter changes by allowing the system to adapt PRB grid structures through varying key parameters such as subcarrier spacing and system bandwidth. The location information mechanism remains consistent while the underlying grid parameters change, enabling flexible resource allocation across different 5G scenarios without requiring fundamentally different approaches for each configuration.
Data Source
AI summary
A method for wireless communication and an apparatus are provided, comprising: determining location information, wherein the location information indicating a quantity of M subcarrier spacings between a second location of a physical resource block (PRB) in a system common PRB grid and a first location in a synchronization signal block, the system common PRB grid having a first subcarrier spacing, the first location being a beginning subcarrier of the synchronization signal block and the first location overlapping with the PRB; sending the location information via a broadcast message.