Communication System Preamble Synchronization for Low Power
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Solution Overview
Problem
Current wireless communication systems face high power consumption at base stations/gateways due to constant listening modes, necessitating a solution for long-distance wireless communication with low power consumption.
Innovation Solution
Implementing a communication system with a transmitting module that sends preambles to a receiving module operating in an idle or transmission mode during a synchronization time period greater than the idle mode, allowing the receiving module to periodically wake up and reduce hardware complexity and power consumption by using a half-duplex mechanism with LPWAN modules like LoRa, Sigfox, LTE Cat-M, and LTE NB-IoT.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station/gateway operates in constant listening mode to enable wireless communication, then communication availability is improved, but power consumption increases
Solution Approach 1:
The receiving module alternates between idle mode and transmission mode in periodic cycles. During idle mode, the module consumes minimal power while remaining capable of receiving preambles during designated synchronization time periods. This periodic switching resolves the contradiction by maintaining communication availability during active periods while dramatically reducing average power consumption through extended idle periods.
2Reliability
If the receiving module operates in constant listening mode to receive communications, then communication reliability is improved, but hardware complexity and power consumption increase
Solution Approach 1:
The receiving module implements periodic operation with defined idle and transmission modes, reducing hardware complexity by only activating full reception functionality during necessary synchronization periods rather than maintaining constant listening capability.
Solution Approach 2:
The system uses preliminary preamble transmission during synchronization time periods to wake up or activate the receiving module before actual data communication is needed. This preliminary action allows the receiver to remain in low-power idle mode most of the time while still maintaining reliable communication capability when needed.
Data Source
AI summary
A communication system includes a transmitting module. The transmitting module is configured to send at least one preamble to a receiver module operating alternatively in an idle mode or a transmission mode during a synchronization time period (Tsync). The synchronization time period (Tsync) is greater than an idle time period of the idle mode of the receiving module.