Wireless Projection Power Management via Time Domain Segmentation
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Solution Overview
Problem
Current wireless projection technologies face challenges in reducing power consumption of Wi-Fi chips during high display frame rates, as devices cannot sleep due to long Wi-Fi transmission periods, leading to increased power consumption and reduced service life.
Innovation Solution
A method that determines a transmission period based on the display frame rate, configuring a time segment for sleep within the transmission period, allowing for efficient data transmission and reducing power consumption by ensuring both the wireless projection apparatus and display apparatus can enter a sleep state without delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic device uses a long Wi-Fi transmission period, then data transmission reliability is improved, but power consumption increases and the device cannot sleep during high display frame rates
Solution Approach 1:
The transmission period is segmented into multiple sub-periods: an active transmission period for sending image data and a sleep period for power saving. This segmentation allows the Wi-Fi chip to alternate between transmission and low-power states, resolving the contradiction between maintaining transmission reliability and reducing power consumption during high display frame rates
Solution Approach 2:
The system implements periodic transmission where the Wi-Fi chip alternates between active transmission periods and sleep periods. This periodic action pattern allows the device to maintain reliable data transmission when needed while entering low-power states during intervals, effectively managing both transmission reliability and power consumption
2Reliability
If the electronic device stays in listening state to maintain projection synchronization, then projection synchronization is maintained, but power consumption increases
Solution Approach 1:
The system performs preliminary actions by establishing transmission and sleep period configurations in advance through negotiation between devices. This allows the Wi-Fi chip to enter sleep state confidently knowing when to wake for transmission, maintaining synchronization without continuous listening and thereby reducing power consumption
3Reliability
If the Wi-Fi transmission period is longer than the display frame rate, then data transmission completeness is improved, but transmission efficiency decreases
Solution Approach 1:
The system dynamically adjusts the transmission period configuration based on display frame rate requirements. By making the transmission period adaptive to the display frame rate, the system ensures complete data transmission while optimizing transmission efficiency, avoiding both overly long periods that reduce efficiency and overly short periods that compromise completeness
Data Source
AI summary
Embodiments of the present disclosure relate to the field of communication technologies and disclose a wireless projection method, apparatus, and system. The method includes: A wireless projection apparatus determines, based on a display frame rate used when the wireless projection apparatus displays an image, a duration of a first transmission period. The wireless projection apparatus negotiates with a display apparatus to determine a configuration of a time domain resource in the first transmission period, where the time domain resource in the first transmission period is configured to include a first time segment, a second time segment, and a third time segment, the first time segment is used to send first data to the display apparatus, the second time segment is used to receive second data sent by the display apparatus, and the third time segment is used for sleep.