A connection method in a wireless peer-to-peer group of nodes, wherein one of the nodes acts as a leader and others act as clients of the group, includes the steps of: sending credential information required for creating a virtual persistent group configuration from the leader to each of the clients; creating a virtual persistent group configuration at each of the clients which has received the credential information from the leader; and when leadership of the leader disappears, establishing a first-time connection between a first client and a second client based on persistent mechanism by invitation using the virtual persistent group configuration.