Listen Before Talk Receiver Power Optimization
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Solution Overview
Problem
As the number of spectrum-sharing devices increases, they spend more time in listen before talk routines, consuming electrical power and draining battery life in devices that rely on small rechargeable batteries, especially in scenarios where determining spectrum availability is time-consuming.
Innovation Solution
A dedicated, very low current consumption radio frequency (RF) listen before talk receiver is used to detect traffic on target wireless spectrum, reducing power consumption and improving battery life by determining availability efficiently and waking up only the necessary transceiver for communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional transceivers are used for listen before talk operations, then spectrum availability can be detected, but power consumption is high and battery life is reduced
Solution Approach 1:
The patent segments the listen before talk function into a separate dedicated receiver component, distinct from the main radio access transceiver. This dedicated LBT receiver is specifically designed for spectrum sensing with minimal power consumption, while the main transceiver remains in low-power state until actual communication is needed. The segmentation allows independent optimization of power consumption for the sensing function.
Solution Approach 2:
The dedicated LBT receiver acts as an intermediary between the main transceiver and the wireless spectrum environment. It performs the spectrum sensing function and provides information to the main transceiver, which then decides whether to activate for communication. This intermediary approach allows the main transceiver to remain dormant and consume minimal power while still maintaining the capability to detect spectrum availability.
2Adaptability or versatility
If multiple transceivers are kept active for different radio access technologies, then communication flexibility is improved, but power consumption increases
Solution Approach 1:
The patent implements a dynamic transceiver activation strategy where the main radio access transceiver is activated only when the dedicated LBT receiver detects available spectrum and actual communication is required. The system dynamically transitions between low-power dormant state and active communication state based on real-time spectrum conditions and communication needs, optimizing the balance between versatility and power consumption.
Solution Approach 2:
The system changes the operational state parameter of the main transceiver from active to dormant based on LBT results. When the dedicated receiver detects occupied spectrum, the main transceiver remains in low-power dormant state. When spectrum is available and communication is needed, the transceiver parameter changes to active state, enabling communication while minimizing overall power consumption over time.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach minimizes power consumption during listen before talk operations, reduces battery drain, and allows for additional energy savings by determining the optimal transceiver to use, thereby enhancing battery life and reducing contention on shared spectrum.
Implementation Method 1
conducting a listen before talk operation with a listen before talk receiver to determine if a target wireless spectrum is available
Data Source
AI summary
A method and electronic device for conducting wireless radio communications are disclosed. Conducting the wireless radio communications includes determining that the electronic device has a reason to communicate over a wireless radio interface and conducting listen before talk with a listen before talk receiver in response to the determining that the electronic device has the reason to communicate over the wireless radio interface. Upon detecting, through the listen before talk, that wireless spectrum for the wireless radio interface is available for conducting the wireless radio communications, activating a radio access transceiver and carrying out the wireless radio communications over the wireless radio interface using the available wireless spectrum.