PSS-SSB Synchronization Timing for Lower 5G Signal Overhead
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Solution Overview
Problem
Existing wireless communication networks face high system overhead due to the long duration of synchronization signal bursts, particularly in 5G/NR systems, which affects the efficiency of initial cell search and synchronization processes.
Innovation Solution
The proposed solution involves separating primary synchronization signals (PSS) from synchronization signal blocks (SSB) with equal time separations, allowing PSS to have a larger or equal periodicity compared to SSB, and defining a consistent time separation between PSS and corresponding SSBs, enabling more efficient synchronization procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synchronization signal bursts are transmitted with long duration to ensure reliable synchronization, then synchronization reliability is improved, but system overhead increases
Solution Approach 1:
The synchronization signal burst is segmented into multiple individual synchronization signals transmitted in different slots. Each synchronization signal can be independently detected by the UE, allowing the system to achieve reliable synchronization through multiple opportunities rather than requiring a single long-duration burst, thereby reducing overall system overhead.
Solution Approach 2:
Synchronization signals are transmitted periodically at defined intervals rather than as continuous long-duration bursts. The UE can detect synchronization signals at these periodic intervals, maintaining synchronization reliability while reducing the total time resources consumed for synchronization purposes.
2Productivity
If primary synchronization signals are transmitted frequently to improve synchronization speed, then initial cell search efficiency is improved, but system overhead increases
Solution Approach 1:
The time separation between primary synchronization signals and corresponding synchronization signal blocks is predetermined and configured in advance. This allows UEs to perform preliminary calculations and preparations for synchronization signal detection, improving initial cell search efficiency without requiring excessive transmission frequency that would increase system overhead.
Solution Approach 2:
The system allows flexibility in configuring the time separation parameter between synchronization signals and signal blocks. By optimizing this parameter according to specific network conditions and requirements, the system achieves efficient initial cell search while controlling system overhead through parameter adjustment rather than increasing transmission frequency.
Data Source
AI summary
According to an example aspect of the present disclosure, there is provided a method, comprising determining, by a user equipment, a time separation between a primary synchronization signal of a set of primary synchronization signals in a slot and at least one corresponding synchronization signal block of a set of synchronization signal blocks in another slot, wherein the time separation is the same as a time separation between another primary synchronization signal of the set of primary synchronization signals and at least one other corresponding synchronization signal block of the set of synchronization signal blocks and detecting by the user equipment, based at least on the determined time separation and a location of said primary synchronization signal, the at least one corresponding synchronization signal block of said primary synchronization signal.