Base Station Beam Synchronization for Flexible Delay Services
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Solution Overview
Problem
Conventional LTE technology is inflexible in meeting diverse delay requirements, particularly for low-delay services, and suffers from limited cell coverage due to rigid synchronization signal and PBCH transmission methods, making it difficult for terminals to accurately perform time domain synchronization when multiple beams are used.
Innovation Solution
The method involves selecting appropriate subcarrier spacing and configuring a transmitting time number for each beam to indicate its time position within a transmittable time zone, with information about the transmitting time number being sent to the terminal to determine the subframe boundary and achieve time domain synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional LTE synchronization signal and PBCH transmission methods are used, then the system maintains simplicity and compatibility, but the system cannot fulfill flexible and diversified delay requirements for different service types
Solution Approach 1:
The patent introduces dynamic selection of subcarrier spacing (15 kHz or 30 kHz) and configurable transmitting time numbers for beams, allowing the system to adapt transmission parameters based on service requirements. This dynamic configuration enables flexible delay response for different service types while maintaining a relatively simple base transmission framework.
Solution Approach 2:
The patent changes key transmission parameters including subcarrier spacing (15 kHz or 30 kHz), cyclic shift values, and transmitting time numbers to accommodate different service delay requirements. By varying these parameters, the system achieves adaptability for diverse services without fundamentally changing the transmission structure.
2Area of stationary object
If synchronization signals and PBCH are sent on the basis of beams to expand coverage area, then the cell coverage area is increased, but the terminal cannot accurately identify which beam it detects and thus cannot determine the subframe boundary
Solution Approach 1:
The patent assigns different transmitting time numbers to different beams, creating local distinctions in the time domain for each beam. This allows terminals to identify which specific beam they are receiving by detecting the unique time position, thereby maintaining accurate time domain synchronization even when using multiple beams for expanded coverage.
Solution Approach 2:
The patent introduces transmitting time number as an intermediary indicator that carries beam identification information. This intermediary parameter enables terminals to distinguish between different beams and accurately determine subframe boundaries without requiring complex beam identification mechanisms.
3Area of stationary object
If different beams use different time domain resources for transmission, then the coverage is expanded, but the terminal only knows the beam is in a time range and cannot identify the exact position
Solution Approach 1:
The patent pre-configures and signals the transmitting time number to the terminal before actual data transmission. This preliminary provision of exact time position information allows the terminal to immediately identify the beam's precise time location without needing to search through a time range, thereby reducing processing delay while maintaining expanded coverage through multiple beams.
Data Source
AI summary
An information transmission method, a base station, and a terminal are disclosed herein. As an example, the method includes selecting, through a base station, one subcarrier spacing from at least one preset subcarrier spacing for transmitting a synchronization signal and a physical broadcast channel according to service delay requirements; configuring a transmitting time number of a beam if the base station uses the beam to transmit the synchronization signal and the physical broadcast channel, the transmitting time number being used to indicate a corresponding transmitting time position of the beam in a pre-stored transmittable time zone for the synchronization signal and the physical broadcast channel; and sending information related to the transmitting time number to a terminal, for the terminal to determine a subframe boundary and complete time domain synchronization according to the information related to the transmitting time number and the pre-stored transmittable time zone.