Narrowband LTE Synchronization Signal Allocation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing synchronization signals and broadcast channels, particularly in narrowband LTE systems, due to resource constraints and interference issues, which affect data transfer rates and energy efficiency.
Innovation Solution
A method for transmitting and receiving synchronization signals and broadcast channels in a narrowband LTE system, where the narrowband synchronization signal is received from a base station, allowing for time and frequency synchronization, and the broadcast channel is received based on detected identifiers, using specific subframes and orthogonal frequency division multiple access (OFDM) symbols, minimizing interference with legacy systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If synchronization signals and broadcast channels are transmitted in narrowband LTE systems using legacy resource allocation methods, then resource utilization follows conventional patterns, but resource constraints and interference issues occur affecting data transfer rates and energy efficiency
Solution Approach 1:
The patent changes the time-frequency parameters of synchronization signals and broadcast channels by allocating them to specific subframes (e.g., first subframe for broadcast channel, sixth subframe for primary synchronization signal) and specific OFDM symbols, rather than using legacy continuous allocation. This parameter change optimizes resource utilization and reduces interference, thereby improving data transfer rates while managing resource constraints in narrowband LTE systems.
2Reliability
If synchronization signals and broadcast channels are transmitted using conventional mapping patterns, then system compatibility is maintained, but collisions with legacy systems occur
Solution Approach 1:
The patent segments the transmission resources by assigning synchronization signals and broadcast channels to specific, non-overlapping subframes and OFDM symbols. The broadcast channel is transmitted in the first subframe, primary synchronization signal in the sixth subframe, and secondary synchronization signal in the tenth subframe. This segmentation prevents resource collisions with legacy systems while maintaining system compatibility through standardized signal structures.
3Reliability
If synchronization signals are transmitted in every subframe, then continuous synchronization is achieved, but system complexity and interference increase
Solution Approach 1:
The patent implements periodic transmission of synchronization signals at specific intervals rather than continuous transmission. The primary synchronization signal is transmitted in the sixth subframe and the secondary synchronization signal in the tenth subframe, creating a periodic pattern that provides sufficient synchronization accuracy while reducing system complexity and interference compared to continuous transmission in every subframe.
Data Source
AI summary
Disclosed is a method for transmitting/receiving a signal in a wireless communication system supporting narrow-band (NB)-LTE, which is performed a terminal, including: receiving a narrow band synchronization signal from a base station; acquiring time synchronization and frequency synchronization with the base station based on the narrow band synchronization signal and detecting an identifier of the base station; and receiving a narrow band broadcast channel from the base station based on the detected identifier of the base station.