PRB Grid Location Signaling for 5G Synchronization Blocks
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Solution Overview
Problem
The 5G new radio has not defined a method for a terminal device to obtain a PRB location in a system common PRB grid, nor has it specified the structures of system common PRB grids corresponding to different subcarrier spacings in various system bandwidths.
Innovation Solution
A PRB grid indication method where a network device sends location information to a terminal device, indicating the relative location relationship between a first predetermined location in a synchronization signal block PRB grid and any PRB in a system common PRB grid with a first subcarrier spacing, allowing the terminal device to determine the PRB location using this information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the 5G new radio defines a PRB grid structure for synchronization signal blocks, then the synchronization signal block can be properly structured with PSS, SSS, and physical broadcast channel, but the terminal device cannot obtain the PRB location in the 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 PBCH or other downlink channels, serves as a mediator that enables the terminal device to translate from the known synchronization signal block structure to the unknown system common PRB grid structure, thereby resolving the information loss problem
Solution Approach 2:
The patent adds a new dimension of location information transmission to the existing synchronization signal block structure. By introducing this additional information layer through PBCH or other downlink channels, the system enables terminal devices to obtain PRB location without modifying the fundamental synchronization signal block structure, thus maintaining reliability while gaining location awareness
2Adaptability or versatility
If the 5G new radio defines system common PRB grids for different subcarrier spacings, then the system can support multiple bandwidth configurations, but the terminal device lacks the method to obtain PRB location information
Solution Approach 1:
The patent uses location information as a mediator that simplifies the complex relationship between system common PRB grids and terminal devices. Instead of requiring terminal devices to independently determine PRB locations in different grid configurations, the location information transmitted by the network device provides a straightforward path to obtain PRB location across various subcarrier spacings and bandwidths
Solution Approach 2:
The patent creates a universal location information mechanism that works across multiple system common PRB grid configurations. The same location information transmission approach (via PBCH or other downlink channels) serves all different subcarrier spacings and bandwidth configurations, providing a unified solution that maintains ease of operation while supporting high adaptability
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.