SSB Frequency Hopping for Sub-THz Detection Reliability
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Solution Overview
Problem
In wireless communication systems, particularly in sub-THz frequencies, high bandwidths lead to significant frequency domain response variations, affecting the UE's ability to detect synchronization signal blocks (SSBs) on weak subcarriers, thereby impacting connection reliability.
Innovation Solution
Implementing a new SSB hopping pattern that stabilizes frequency power variations, enhancing SSB detection probability by configuring frequency hopping for synchronization signal blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high bandwidth is used in sub-THz frequencies, then data transmission capacity is improved, but frequency domain response variations increase, reducing SSB detection reliability
Solution Approach 1:
The patent implements dynamic frequency hopping for SSB transmissions, where the frequency location of SSBs changes across different time instances according to a hopping pattern. This dynamic approach allows the system to adapt to frequency domain variations caused by high bandwidth, selecting optimal frequency locations for SSB transmissions to maintain detection reliability while operating at high bandwidths
Solution Approach 2:
The patent changes the frequency parameter of SSB transmissions by implementing frequency hopping patterns that shift the center frequency or frequency offset of SSBs across different subframes or slots. This parameter change enables the system to overcome frequency domain response variations inherent in high bandwidth sub-THz communications, improving SSB detection reliability without reducing bandwidth
2Reliability
If frequency hopping pattern is implemented for SSB, then SSB detection probability is improved, but system complexity increases
Solution Approach 1:
The patent employs periodic frequency hopping patterns where SSB frequency locations follow a predetermined periodic sequence. This periodic approach improves SSB detection probability by systematically exploring different frequency locations while maintaining a simple, predictable structure that reduces implementation complexity compared to arbitrary or adaptive hopping schemes
Solution Approach 2:
The frequency hopping pattern is predetermined and configured in advance through signaling parameters such as ssb-PeriodicitySIB, ssb-PositionsInBurst, and ssb-IntraSlotOffset. This preliminary configuration allows UEs to anticipate SSB frequency locations without requiring complex real-time processing, thereby improving detection probability while minimizing system complexity
Data Source
AI summary
Method and apparatus for SSB hopping for coverage extension. The apparatus scans one or more frequency rasters for at least one SSB. The apparatus measures a correlation between at least a first SSB and a second SSB within the one or more frequency rasters. The apparatus establishes a connection with a network entity in response to the correlation between at least the first SSB and the second SSB exceeding a threshold. The apparatus may transmit an indication identifying a preferred SSB from the at least one SSB. The apparatus may receive an SSB frequency hopping pattern indication that identifies a SSB frequency hopping pattern. The apparatus may scan for an improved SSB over a selected SSB selected for the connection with the network entity.