Patent ID: 8489095

Claim:
A group service providing method for providing a group service to a master terminal and a slave terminal which are provided with a group key from a group service server for use of the group service, the group service providing method comprising: in response to receiving a group service request from the master terminal, receiving contents related to the group service request from a content provision server, wherein the group service request comprises a request for a group service involving the master terminal controlling a function of the slave terminal, and wherein the received contents comprise a terminal function control program; combining the received contents with the group key and valid duration information of the contents and storing the combined contents; transmitting a content download guide message to the slave terminal for downloading the contents combined with the group key with reference to terminal information of the slave terminal received from a communication network server associated with the master terminal; and in response to receiving an ad-hoc network participation request from the slave terminal that has downloaded the contents combined with the group key according to the content download guide message, setting up an ad-hoc network between the master terminal and the slave terminal that has received the combined contents, wherein the ad-hoc network enables the master terminal to control the function of the slave terminal.