Wi-Fi P2P Group Owner Selection Using Device Power Attributes
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Solution Overview
Problem
Current Wi-Fi Direct technology determines Group Owners in Wi-Fi P2P groups solely based on intent values, leading to rapid battery consumption in battery-powered mobile terminals, as they are often designated as Group Owners, reducing their operational time.
Innovation Solution
A method and apparatus that acquire device information, adjust intent values based on device types or battery life, and form Wi-Fi P2P groups to ensure a battery-powered mobile terminal operates as a Group Client, thereby extending its operational time by designating always-powered devices or terminals with longer battery life as Group Owners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If Group Owner is determined solely by comparing intent values, then the Group Owner selection process is simple, but battery-powered mobile terminals are likely to be selected as Group Owner causing rapid battery consumption
Solution Approach 1:
The patent changes the parameters used for Group Owner selection from only intent values to include multiple device attributes such as device type, power source type, and battery capacity. This allows battery-powered devices to have their intent values adjusted based on these additional parameters, preventing them from being selected as Group Owner and thus reducing battery consumption.
Solution Approach 2:
The patent introduces an intermediary evaluation mechanism that assesses device suitability for Group Owner role before final selection. This intermediary step analyzes device attributes and modifies intent values accordingly, acting as a mediator between the simple intent value comparison and the final Group Owner determination, thereby preventing battery-powered devices from being selected.
2Ease of operation
If battery-powered mobile terminals operate as Group Owner, then they can control the Wi-Fi P2P group operations, but their operational time is reduced due to rapid battery consumption
Solution Approach 1:
The patent changes the selection parameters to consider device power characteristics, ensuring that devices with unlimited power sources (always-powered devices) or larger battery capacities are preferentially selected as Group Owner. This parameter change ensures that battery-powered mobile terminals with limited operational time do not become Group Owners, thus preserving their operational duration while still allowing capable devices to control group operations.
3Use of energy by moving object
If always-powered devices are designated as Group Owner, then battery consumption of mobile terminals is reduced, but the selection process requires additional device information checks
Solution Approach 1:
The patent applies preliminary action by having devices exchange and share their attribute information (device type, power source, battery capacity) during the initial device discovery phase, before the Group Owner selection process begins. This preliminary gathering of information simplifies the subsequent selection process, as the data is already available and does not require additional complex checking during the actual selection.
Solution Approach 2:
The patent makes the device information exchange mechanism universal by having all devices share their attributes during discovery, which serves multiple purposes: it enables battery consumption optimization, supports Group Owner selection, and provides information for other potential uses. This multi-functional approach avoids the need for separate information gathering processes.
Data Source
AI summary
Provided is a method for forming a Wi-Fi Peer-to-Peer (P2P) group using Wi-Fi Direct. The method includes acquiring device information of other P2P device corresponding to a connection target by P2P devices that will form a Wi-Fi P2P group; checking a type of the other P2P devices based on the acquired device information; adjusting an intent value of a P2P device depending on the checked type of the other P2P devices; and forming a Wi-Fi P2P group based on the adjusted intent values of the P2P devices.


