Patent ID: 7756106

Claim:
A communication terminal which is connected to an IP (Internet Protocol) network and performs a telephone call by an SIP (Session Initiation Protocol), comprising: a browsing unit configured to browse Internet resources; an Internet resource sharing unit configured to, in order to share a same Internet resource by the browsing unit and another browsing unit of an in-call party communication terminal to which the telephone call from the communication terminal is being performed, transmit to the in-call party communication terminal a file including a URL of a Web page being displayed by the browsing unit and a browser activation instruction by using an IP address of the in-call party communication terminal obtained when the telephone call starts by transmitting a telephone number of the in-call party communication terminal designated by a dialing operation of a user to an SIP server; and a display screen sync control unit configured to i) transmit displayed area information which specifies a displayed area of the Web page displayed on the browsing unit and scrolled information which indicates a scrolled position of the Web page displayed on the browsing unit to the in-call party communication terminal when the displayed area of the Web page is scrolled by a scrolling operation of the browsing unit, ii) to receive, from the in-call party communication terminal, displayed area information and scrolled information of a Web page corresponding to the URL displayed on the another browsing unit of the in-call party communication terminal, and iii) to scroll the displayed area of the Web page in accordance with the received displayed area information and scrolled information so that a same display state is formed on the browsing unit and the another browsing unit of the in-call party communication terminal, wherein the Internet resource sharing unit determines a screen size by receiving a number of maximum-sized pixels capable of being displayed from the in-call party communication terminal and comparing the received number with a maximum number of pixels capable of being displayed by the own communication terminal, and wherein the display screen sync control unit exchanges the scrolled information in response to a scroll operation by the browsing unit or the another browsing unit.