5G NR SSB Time-Shifting for Low-SINR Coverage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G NR cellular telecommunication networks, Synchronization Signal Blocks (SSBs) from adjacent cells interfere due to simultaneous transmission on the same time and frequency resources, leading to degraded Signal to Noise Ratio (SNR) in overlapping coverage areas.
Innovation Solution
SSBs from adjacent cells are transmitted in different time slots and using non-overlapping or minimally overlapping frequency resources, reducing interference and improving Signal to Interference Noise Ratio (SINR) at User Equipment (UE) devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If SSBs are transmitted on the same time and frequency resources from adjacent cells, then resource utilization is maximized, but SSB interference increases significantly
Solution Approach 1:
The patent divides the SSB transmission schedule into different time slots for adjacent cells, segmenting the time domain to prevent simultaneous transmissions. This segmentation reduces interference while maintaining efficient resource utilization by ensuring that different cells transmit SSBs at different times rather than all at once.
Solution Approach 2:
The patent implements periodic SSB transmissions with adjusted periodicities for different cells. By varying the transmission periodicity, the system ensures that adjacent cells do not transmit SSBs simultaneously, reducing interference while maintaining continuous coverage through periodic repetitions at optimized intervals.
2Productivity
If SSBs are transmitted simultaneously from adjacent cells, then transmission efficiency is maximized, but SINR degrades significantly
Solution Approach 1:
The patent performs preliminary scheduling of SSB transmissions at different time slots before actual transmission occurs. This preliminary arrangement ensures that adjacent cells are configured to transmit at non-overlapping times, preventing interference from the outset while maintaining efficient overall transmission planning.
Solution Approach 2:
The patent dynamically adjusts transmission time slots and periodicities based on cell configuration and interference conditions. This dynamic scheduling allows the system to optimize SINR by adapting transmission timing to minimize interference while maintaining high transmission efficiency through flexible resource allocation.
3Reliability
If time shifting SSB transmissions is implemented, then SS-SINR improves by 9-13 dB, but transmission complexity increases
Solution Approach 1:
The patent changes the time domain parameters (time slots and periodicity) of SSB transmissions to optimize SINR. By adjusting these temporal parameters, the system achieves 9-13 dB improvement in SS-SINR while the complexity increase is managed through standardized parameter modification rather than fundamental system redesign.
Data Source
AI summary
Disclosed is a method of transmitting Synchronization Signal Blocks (SSBs) in a Fifth-Generation (5G) New Radio (NR) cellular telecommunication Radio Access Network (RAN). The method is performed by a Radio Unit (RU) device and includes: transmitting first symbols from a first antenna in a first sector, two or more of the first symbols including a first SSB; transmitting second symbols from a second antenna in a second sector, two or more of the second symbols including a second SSB; and transmitting third symbols from a third antenna in a third sector, two or more of the third symbols including a third SSB. The transmitting is performed during a first time slot and a second time slot. The symbols including the first SSB, the symbols including the second SSB, and the symbols including the third SSB are transmitted during different time periods.