Patent ID: 8525867
Filing Date: 2013-09-03
Classification: H04L,H04N

Abstract:
1. A chatting service method interworking with a video phone service in a mobile communication system capable of using a video phone service, the method comprising the steps of: initiating a video phone call between a first mobile communication terminal and a second mobile communication terminal; transmitting, by a mobile switching center (MSC), chatting service subscription confirmation messages to the first mobile communication terminal and the second mobile communication terminal, which are participating in the video phone call; if a chatting service request signal is input to the first mobile communication terminal, confirming whether the first mobile communication terminal is available for a chatting service interworking with a video phone service by checking the chatting service subscription confirmation message transmitted from the MSC; if the chatting service is available, transmitting, by the first mobile communication terminal, a chatting service request message through the MSC to the second a mobile communication terminal; confirming whether the second mobile communication terminal is available for the chatting service by checking the chatting service subscription confirmation message transmitted from the MSC; transmitting the confirmation result to the first mobile communication terminal; and if the second mobile communication terminal is available for the chatting service, transmitting, by the second mobile communication terminal, a chatting service response message through the MSC to the first mobile communication terminal to initiate the chatting service interworking with the video phone service.