Secondary Synchronization Signaling Interleaving for 5G NR
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Solution Overview
Problem
Existing wireless communication technologies, such as 5G NR and LTE Evolution, face inefficiencies due to high control signaling overhead, which hampers system speed and flexibility in synchronization signaling.
Innovation Solution
A new design for secondary synchronization signaling that uses interleaving orders of pre-defined component sequences to implicitly convey information like OFDM symbol offset and SS block time index, reducing the need for extra information bits and enhancing flexibility and detection complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional explicit signaling methods are used to convey system information, then information delivery is straightforward, but control signaling overhead increases and system efficiency decreases
Solution Approach 1:
The patent changes the parameter being signaled by using different interleaving orders of component sequences to represent different system information values. Instead of adding explicit information bits, the invention modifies the arrangement parameter (interleaving order) of existing sequences to convey additional information, thereby reducing signaling overhead while maintaining information delivery capability
Solution Approach 2:
The patent makes the synchronization signals serve multiple functions: they simultaneously provide time/frequency synchronization and convey system information through interleaving order indication. This multi-functionality eliminates the need for separate dedicated signaling channels, reducing overall control signaling overhead in the system
2Loss of information
If more information bits are added to convey system information, then information completeness improves, but detection complexity and processing overhead increase
Solution Approach 1:
The invention encodes system information in the interleaving order parameter of component sequences rather than using additional information bits. The UE detects the interleaving order directly from the received signal, which is computationally simpler than decoding additional modulated bits, thereby maintaining information completeness while reducing detection complexity
3Adaptability or versatility
If flexible beamforming is implemented, then system adaptability improves, but control signaling overhead increases
Solution Approach 1:
The patent uses interleving order parameters to indicate beamforming-related system information, allowing the network to convey flexible beamforming configuration details without adding explicit control signaling. The same synchronization signal structure adapts to different beamforming scenarios by changing only the interleaving order, maintaining adaptability while minimizing overhead
Data Source
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AI summary
This disclosure pertains to a method for operating a network node (100) in a radio access network. The method comprises transmitting synchronisation signaling, the synchronisation signaling comprising a signaling sequence, the signaling sequence being determined as a combination of a number of sub-sequences, wherein an order of the sub-sequences is mapped to synchronisation information. The disclosure also pertains to related devices and methods.