Patent ID: 7295854
Filing Date: 2007-11-13
Classification: H04L,H04W

Abstract:
1. A method for controlling a point-to-multipoint transmission of a message in a mobile communication system, the method comprising receiving the message; storing the message in a buffer of the messages to be transmitted; scheduling the message; transmitting the message located in the buffer according to the predetermined scheduling; scheduling a starting time of the transmission; delaying a first transmission until the beginning of the starting time of the transmission; determining a life time for the message; deleting the message from the buffer in response to the expiry of the life time; checking before transmitting the message, whether there is life time left; and if there is, transmitting the message, and if there is not, deleting the message from the buffer, determining an acknowledgement time for the message to be transmitted as a group call; transmitting the message to the group members; waiting for the acknowledgements of the group members during the acknowledgement time; checking after the expiry of the acknowledgement time, whether a predetermined part of the group members has acknowledged the message; and if it has, deleting the message from the buffer; and if it has not, transmitting the message located in the buffer to the group members from whom an acknowledgement has not been received.