Wireless Device Packet Detection for Power Control
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Solution Overview
Problem
Existing wireless communication systems face increased power consumption due to interference from other systems using the same frequency band, leading to inefficiencies in power source control.
Innovation Solution
A wireless communication device and system that includes a packet detection unit, judgment unit, and power source control unit to detect and verify a predetermined identifier, allowing for controlled power supply based on the presence or absence of packet reception, thereby reducing unnecessary power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless base station operates continuously to detect packets, then packet reception reliability is improved, but power consumption increases
Solution Approach 1:
The wireless base station alternates between sleep mode and operation mode in periodic cycles. During sleep mode, the base station consumes minimal power while still capable of detecting wake-up packets. When a wake-up packet is detected, the base station transitions to operation mode to communicate with the terminal, then returns to sleep mode. This periodic action reduces overall power consumption while maintaining the ability to reliably detect and respond to terminal communications.
2Speed
If the wireless base station operates continuously, then communication responsiveness is improved, but power consumption increases
Solution Approach 1:
The terminal performs preliminary actions by transmitting wake-up packets before actual data communication is needed. These wake-up packets serve as advance notification to the base station, allowing it to transition from sleep mode to operation mode in anticipation of upcoming communication. This preliminary action ensures the base station is ready for communication when needed, maintaining responsiveness while avoiding continuous operation.
3Measurement precision
If the base station activates on any received signal, then signal detection sensitivity is improved, but false activation from interference increases
Solution Approach 1:
The system extracts and utilizes specific distinctive features of wake-up packets (such as particular packet formats, addressing information, or signal characteristics) to differentiate them from interference signals. The base station is configured to activate only when these specific features are detected, rather than responding to any received signal. This extraction of key identifying features enables reliable distinction between legitimate wake-up packets and interference, preventing false activations while maintaining sensitivity to valid signals.
Data Source
AI summary
A wireless communication device includes: a packet detection part detecting presence/absence of a reception of a packet; a judgment part judging whether or not temporal change of presence/absence of the reception of the packet detected in the packet detection part corresponds to a predetermined identifier; and a power source control unit controlling power supply from a power source based on a result of a judgment in the judgment part.