Method, system and a network element for controlling point-to-multipoint transmission in a mobile communication system
First Claim
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1. A method for controlling a point-to-multipoint transmission of a message in a mobile communication system, the method comprisingreceiving 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, andif 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.
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Abstract
A method, a system and a network element for controlling the transmission of a message to be transmitted point-to-multipoint in a mobile communication system. In order to take the topicality of the content of the message to be transmitted point-to-multipoint into account, a life time is determined for the message in the method and the message waiting to be transmitted is deleted from the buffer in response to the expiry of the life time.
29 Citations
12 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A mobile communication system comprising at least one service center to transmit a message as a point-to-multipoint transmission and at least one network element via which the message is transmitted to cells belonging to a destination area, wherein the service center is arranged to
schedule a starting time of the transmission; - and
delay the first transmission until the beginning of the starting time of the transmission, wherein the network element is arranged to determine the remaining life time of the message for point-to-multipoint transmission and to check before transmitting the message, whether there is life time left and to transmit the message only if there is still life time left; determine the remaining life time of the message and to check before transmitting the message, whether there is life time left and to transmit the message only if there is still life time left; and receive acknowledgements from the group members during a certain acknowledgement time and to transmit the information on the acknowledgements in one message to the service center.
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10. A network element of a mobile communication network which network supports the point-to-multipoint transmission of a message,
wherein the network element comprises means for scheduling a starting time of the transmission; - and
means for delaying the first transmission until the beginning of the starting time of the transmission; means for determining the remaining life time of a message to be transmitted point-to-multipoint; means for transmitting said message according to the scheduling of the message, if there is still life time left; means for determining the acknowledgement time for the message to be transmitted as a multipoint group call which has to be acknowledged; means for monitoring the acknowledgements until the acknowledgement time has expired; and means for compiling the acknowledgements as one acknowledgement report. - View Dependent Claims (11, 12)
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Specification