Adaptive Transmit Power Control for D2D Communication
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Solution Overview
Problem
Device-to-device (D2D) communication in electronic devices for public safety and V2X applications faces high power consumption due to the retransmission scheme, which is not efficiently managed, leading to potential interference and suboptimal reception rates.
Innovation Solution
An electronic device and method for controlling transmit power in D2D communication, where the transmit power is adaptively determined based on the device's state, battery level, and proximity to other devices, allowing for reduced power consumption and improved reception rates by varying the power levels during retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a retransmission scheme is used to achieve required reception rate in D2D communication, then reception reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the transmit power level adaptive rather than fixed. The transmitting device dynamically adjusts the power level for retransmissions based on feedback information from the receiving device, transitioning from a static power approach to a dynamic one that optimizes both reliability and power consumption.
Solution Approach 2:
The patent changes the power parameter adaptively by selecting different power levels for retransmissions based on feedback. Instead of using a fixed power level for all transmissions, the system modifies the power parameter according to channel conditions and reception quality, thereby reducing unnecessary power consumption while maintaining required reception rate.
2Device complexity
If fixed power level is used for all transmissions including retransmissions, then device complexity is reduced, but power consumption cannot be optimized
Solution Approach 1:
The patent introduces feedback from the receiving device to the transmitting device about reception quality and channel conditions. This feedback mechanism enables the transmitting device to adjust power levels for retransmissions appropriately, optimizing power consumption without excessive complexity in the power control logic.
Data Source
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AI summary
An electronic device according to various embodiments may include at least one transceiver, and at least one processor, operatively coupled to the at least one transceiver, configured to control to transmit, via a device-to-device (D2D) communication path to at least another electronic device, a signal with a first transmit (Tx) power, and control to re-transmit, via the D2D communication path to the at least another electronic device, the signal with a second Tx power lower than the first Tx power.