Wi-Fi Direct Pre-Linking for Low-Delay Data Sharing
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Solution Overview
Problem
Existing wireless communication technologies face challenges in balancing low device power consumption with reduced connection delay during data sharing between devices, as maintaining constant connections leads to high power consumption while starting connections on demand results in significant delays.
Innovation Solution
A data transmission method that involves performing device discovery and establishing physical links with multiple devices upon detecting a trigger signal, followed by sending data to a selected target device, ensuring low power consumption and minimizing connection delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a connection is constantly maintained between devices, then the connection delay is zero, but the device power consumption is high
Solution Approach 1:
The system performs device discovery and pre-establishes physical links with multiple potential target devices before actual data transmission is needed. This preliminary action ensures that when data sharing is required, the connection is already in place (zero delay) without maintaining continuous connections (lower power consumption).
Solution Approach 2:
The connection state is made dynamic rather than static. The system transitions between disconnected and connected states based on actual data sharing needs, using trigger signals to activate connections only when necessary. This dynamic approach allows the system to have zero connection delay when needed while avoiding continuous power consumption.
2Use of energy by moving object
If the connection between devices is started only when a device is selected for data transmission, then the device power consumption is low, but the connection delay is high
Solution Approach 1:
Device discovery and physical link establishment are performed in advance before data transmission is actually needed. The system proactively sets up connections with potential target devices, so when a device is selected for data transmission, the connection is already established, eliminating connection delay while avoiding continuous connection maintenance.
Solution Approach 2:
The connection process is segmented into distinct phases: device discovery phase (low power), connection establishment phase (triggered), and data transmission phase (active). This segmentation allows the system to spend most time in low-power state while being able to rapidly establish connections when needed, balancing power consumption and connection delay.
3Loss of time
If device discovery is performed continuously, then the connection delay is reduced, but the device power consumption increases
Solution Approach 1:
Device discovery is performed periodically or on-demand based on trigger signals rather than continuously. The system activates discovery and connection establishment only when data sharing is initiated, maintaining low power consumption during idle periods while ensuring fast connection when needed.
Solution Approach 2:
The system uses trigger signals from user actions (such as initiating data sharing) to automatically activate device discovery and connection processes. This self-service approach ensures connections are established quickly when needed without requiring continuous active scanning, thereby balancing power consumption and connection delay.
Data Source
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AI summary
This application relates to the field of wireless communication technologies, and in particular, to a data transmission method, a data transmission system, an electronic device, and a storage medium. The method includes: A first device performs device discovery when detecting a preset trigger signal acting on to-be-shared data. The first device establishes physical links with n discovered second devices, where Wi-Fi direct connection functions of the first device and the n second devices are enabled. The first device sends the to-be-shared data to a target device when detecting a selection signal of the target device, where the target device is one of the n second devices. According to embodiments of this application, the first device performs device discovery when detecting the preset trigger signal acting on the to-be-shared data, and establishes the physical links with the n discovered second devices before the target device is selected for data transmission. This reduces a connection delay between devices and ensures low device power consumption while ensuring ease-of-use of a user operation.