Patent ID: 7995517

Claim:
A method of multimedia communication in a mobile communications network, the method comprising: allocating data in a message to be transmitted via a multimedia messaging service (MMS) protocol to a sequence of protocol data units (PDUs), wherein each PDU in the sequence is associated with a sequence number identifying a position of the PDU in the sequence; transmitting a first PDU in the sequence, the first PDU containing a transmission request comprising contents of the message and a total number of the PDUs in the sequence; transmitting a subsequent PDU in the sequence according to the PDU's sequence number, in response to an acknowledgment received, confirming receipt of the previously transmitted last PDU; and retransmitting the last transmitted PDU if a respective acknowledgement is not received for the previously transmitted last PDU, wherein the acknowledgment contains information regarding a number of at least one successfully transmitted PDU, wherein the PDUs are transmitted and retransmitted from a transmitting terminal to an MMS Center (MMSC) connected to the mobile communication network, wherein the PDUs are transmitted and retransmitted from the MMSC to a receiving terminal connected to the mobile communication network, wherein the message is transmitted from the same MMSC to the receiving terminal after receiving a last PDU from the transmitting terminal connected to the mobile communication network, the same PDUs received from the transmitting terminal transmitted sequentially to the receiving terminal, starting from the same first PDU, wherein each PDU comprises a data field for indicating the sequence number of the PDU and a zero value is assigned to the data field for the first PDU or no value is assigned to the data field for the first PDU, and wherein the first PDU comprises a data field for indicating the total number of the PDUs in the sequence.