Mobile Device Direct Connection Handover via Access Point

The mobile device and image display apparatus perform device discovery and service discovery in advance through the access point before actual direct connection is needed. The apparatus stores discovery results and connection parameters, so when direct connection is initiated, the group generation process is significantly accelerated because the devices already know each other's capabilities and can skip redundant discovery steps.

The access point serves as an intermediary that facilitates the initial device discovery and service discovery processes. Through the access point, devices can exchange information and establish connection parameters before transitioning to direct Wi-Fi P2P connection, thereby reducing the overall connection establishment time while maintaining the benefits of direct connection.

Device discovery and service discovery are performed in advance through the access point, storing connection information before direct connection is needed. This preliminary action allows the actual direct connection to be established much faster, reducing service start time while maintaining the extended transmission range advantage of Wi-Fi P2P.

The connection establishment process is segmented into two phases: an initial discovery phase through the access point (which can be done preliminarily), and a direct connection phase. By separating these functions and allowing the first phase to occur in advance, the patent reduces the time penalty associated with direct connection while preserving the transmission range benefits.