M-Sequence Synchronization Signals for Low-Latency Radio Resource Management
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Solution Overview
Problem
Next-generation wireless communication systems, such as 3GPP-NR, require efficient and unified radio resource acquisition mechanisms that work across various use cases like eMBB, URLLC, and mMTC, each with different coverage requirements and frequency bands, necessitating seamless and low-latency radio resource management.
Innovation Solution
A base station generates primary and secondary synchronization signals using M-sequences of length 127 in the frequency domain, incorporating cell identification information through cyclic shifts, and transmits these signals to user equipment over downlink channels, enabling efficient cell identification and radio resource tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional synchronization signal designs are used, then system compatibility is maintained, but latency and efficiency in radio resource management deteriorate
Solution Approach 1:
The synchronization signal is segmented into two distinct parts: a primary synchronization signal (PSS) for basic timing and frequency synchronization, and a secondary synchronization signal (SSS) for cell identification and additional synchronization information. This segmentation allows each part to be optimized for specific functions, reducing overall latency while maintaining compatibility
Solution Approach 2:
The patent employs dynamic signal structures where the synchronization signals can be adaptively configured based on different use cases (eMBB, URLLC, mMTC). The signal parameters such as sequence length, cyclic shift, and resource allocation can be dynamically adjusted to meet specific latency and reliability requirements while maintaining backward compatibility
2Productivity
If unified radio resource acquisition mechanism is implemented, then efficiency across diverse use cases improves, but system complexity increases
Solution Approach 1:
The synchronization signal design provides universal functionality that serves multiple use cases (enhanced mobile broadband, ultra-reliable low-latency communication, and massive machine-type communication) through a unified framework. The same basic signal structure and processing mechanisms are used across all use cases, improving efficiency while avoiding the need for separate complex systems for each application
Solution Approach 2:
The patent achieves unified radio resource acquisition by changing key parameters of the synchronization signals (such as sequence initialization values, cyclic shift amounts, and resource element allocations) to accommodate different use cases, rather than implementing fundamentally different signal structures. This parameter-based adaptation improves productivity while keeping the overall system complexity manageable
3Measurement precision
If frequency domain M-sequences are used for synchronization signals, then sequence correlation properties improve, but generation and processing complexity increases
Solution Approach 1:
The patent uses M-sequences (maximum length sequences) which are well-established pseudorandom sequences with excellent autocorrelation and cross-correlation properties. By copying and adapting these proven sequences for frequency domain implementation, the patent achieves high measurement precision for synchronization while leveraging existing theoretical understanding and implementation techniques to manage complexity
Data Source
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AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). A method of a base station (BS) for transmitting synchronization signals in a wireless communication system. The method comprises generating a primary synchronization signal (PSS) including one of multiple PSS sequences that is generated based on a M-sequence of length 127 in a frequency domain, wherein the PSS indicates part of cell identification (ID) information using a cyclic shift performed on the M-sequence generating the PSS; generating a secondary synchronization signal (SSS) including one of multiple SSS sequences that is generated based on multiple BPSK modulated M-sequences of length 127 in the frequency domain, wherein the SSS indicates the cell ID information using cyclic shifts performed on the M-sequences generating the SSS; and transmitting, to a user equipment (UE), the PSS and SSS over downlink channels.