Simultaneous Cell ID and Frame Number Detection in NB M2M
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Solution Overview
Problem
The existing narrowband machine-to-machine (NB M2M) cell synchronization approach requires sequential detection of cell ID and frame number, increasing synchronization time due to the need to know the cell-specific scrambling sequence for frame number detection, which is dependent on the cell ID.
Innovation Solution
A method that collects and processes multiple versions of sequences corresponding to cell identity and frame number information simultaneously, allowing for simultaneous detection of cell ID and frame number without sequential detection by applying the determined cell ID to descramble and process frame number sequences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sequential detection is used to determine cell ID first and then frame number, then the detection process is simplified and easier to implement, but the synchronization time increases
Solution Approach 1:
The patent combines the cell ID detection and frame number detection into a single simultaneous detection process. By merging these two sequential operations into one parallel operation, the system eliminates the waiting time between determining cell ID and using it to detect frame number, thus reducing synchronization time while maintaining detection accuracy
Solution Approach 2:
The patent performs preliminary accumulation of correlator outputs for both cell ID and frame number over multiple frames before final detection. This preliminary action allows the system to prepare detection data in advance for both parameters simultaneously, enabling faster and more accurate detection without the sequential delay of traditional methods
2Ease of operation
If cell ID is determined first to enable frame number detection, then the detection sequence is clear and manageable, but the overall detection speed decreases
Solution Approach 1:
The patent merges the management of detection sequences by processing both cell ID and frame number detection in parallel within a unified detection framework. This approach maintains the clarity of detection sequences while eliminating the sequential execution delay, thereby improving detection speed without sacrificing operational clarity
Solution Approach 2:
The patent segments the detection process into independent parallel streams for cell ID and frame number, each with its own correlation and accumulation operations. This segmentation allows both detections to proceed simultaneously without interfering with each other, improving overall detection speed while keeping each detection path clear and manageable
Data Source
AI summary
A method in a node comprises receiving a signal, and collecting a first set of sequences corresponding to a first piece of cellular information and a second set of sequences corresponding to a second piece of cellular information over multiple frames of the received signal, wherein the second piece of cellular information is encoded based at least in part on the first piece of cellular information. The method further comprises processing the first set of sequences corresponding to the first piece of cellular information to determine the first piece of cellular information, and processing, using the determined first piece of cellular information, the second set of sequences corresponding to the second piece of cellular information to determine the second piece of cellular information simultaneously with the determination of the first piece of cellular information.