Patent ID: 8451859
Filing Date: 2013-05-28
Classification: H04L,H04W

Abstract:
1. A packet type retransmission system for providing Digital Multimedia Broadcasting (DMB) services to both DMB compliant and DMB non-compliant user devices, the system comprising: a Digital Multimedia Broadcasting to Internet Protocol (DMB-IP) converter for wirelessly receiving DMB data from a DMB broadcasting device through a satellite or ground-waves and for converting the received DMB data to DMB-converted IP packet data; and an IP based multimedia transmitting device for wirelessly retransmitting the DMB-converted IP packet data to DMB non-compliant handheld user devices that cannot directly receive DMB data, the DMB-converted IP packet data being converted through the DMB-IP converter prior to being retransmitted to the DMB non-compliant handheld user devices; wherein the IP based multimedia transmitting device comprises: an IP switch for receiving the DMB-converted IP packet data and for switching to transceivers of subscribers; a Packet Identifier (PID) extracting section for extracting PID information from the DMB-converted IP packet data input to the IP switch; a zapping processing section configured for controlling switching of the IP switch using the PID information extracted by the PID extracting section and DMB channel selection information of subscribers; and transceivers being configured for wirelessly transferring the DMB-converted IP packet data transferred through the IP switch to the DMB non-compliant handheld user devices and for transferring said DMB channel selection information to said zapping processing section.