Communication Device Synchronization Signal Buffering for Reduced Processing Delay
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Solution Overview
Problem
Existing 5G communication systems face challenges in efficiently searching for and measuring signal strength from cells using wide frequency bands, particularly in millimeter wave bands, due to the complexity and processing delays in performing synchronization signal-reference signal received power (SS-RSRP) estimation.
Innovation Solution
The proposed method involves storing synchronization signals from cells in multiple buffers during shorter cell search periods within an SSB burst set period, allowing for parallel processing of primary and secondary synchronization signal searches, and subsequent SS-RSRP estimation, thereby reducing processing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If synchronization signals are stored and processed sequentially in a single buffer, then the processing logic is simple, but the processing delay increases and operating performance deteriorates
Solution Approach 1:
The patent divides the single buffer into multiple buffers (first buffer, second buffer, third buffer) to store different signal samples simultaneously. This segmentation allows parallel processing of multiple synchronization signals, reducing processing delay and improving operating performance without increasing overall system complexity significantly.
Solution Approach 2:
The patent transitions from sequential single-buffer processing to parallel multi-buffer processing, adding a temporal dimension to the processing architecture. By storing multiple signal samples across different time periods in separate buffers, the system can process signals concurrently rather than sequentially, thereby reducing processing delay.
2Speed
If multiple buffers are used to store signal samples for parallel processing, then processing speed improves, but device complexity increases
Solution Approach 1:
The patent segments the buffer memory into distinct first, second, and third buffers, each serving specific processing functions. This segmentation enables parallel access to different signal samples while maintaining manageable complexity through clear functional separation of each buffer's purpose.
Solution Approach 2:
The patent performs preliminary storage of synchronization signal samples in multiple buffers during cell search periods before actual SS-RSRP estimation is needed. This preliminary action prepares the data structure in advance, allowing rapid parallel processing when measurement is required, thus improving processing speed without proportionally increasing operational complexity.
3Measurement precision
If cell search periods are extended to match SSB burst set periods, then complete signal measurement is achieved, but the time required for cell search and signal strength measurement increases
Solution Approach 1:
The patent performs preliminary storage of complete synchronization signal samples across multiple buffers during shorter cell search periods. By preparing all necessary signal data in advance in the first, second, and third buffers, the system enables accurate SS-RSRP measurement without requiring the terminal to wait for the entire SSB burst set period, thus reducing cell search time while maintaining measurement precision.
Solution Approach 2:
The patent segments the signal measurement process into distinct phases: signal acquisition in first buffer, additional sample collection in second buffer, and reference signal processing in third buffer. This segmentation allows the terminal to complete accurate measurements using data from multiple shorter cell search periods rather than waiting for one extended period matching the SSB burst set duration.
Data Source
AI summary
An operating method of a communication device includes storing a first part of a synchronization signal received from a cell as a first signal sample in first and second consecutive synchronization signal periods, determining a synchronization signal-reference signal received power (SS-RSRP) estimation candidate within the first and second consecutive synchronization signal periods based on the first signal sample, and performing an SS-RSRP estimation operation on the SS-RSRP estimation candidate.