Patent ID: 8855146
Filing Date: 2014-10-07
Classification: H04L,H04W

Abstract:
1. A method for, in a radio communication system having at least a content server, a plurality of base stations, and a plurality of radio terminals, enabling two or more base stations among the plurality of base stations to broadcast or multicast data delivered from the content server to the radio terminals, the method comprising: providing a Broadcast Multicast Service (BCMCS) Serving Node between the content server and the two or more base stations; the two or more stations transmitting a path setting request including time information corresponding to a leading time of a period of period number zero (0) for setting a path of data transmission between the BCMCS Serving Node and the two or more base stations: and the BCMCS Serving Node calculating a transmission time of the data received from the content server on a basis of a time managed by the BCMCS Serving Node, length of data received from the content server, and transmittable data amount within one period, and determining a period number and a sequence number to be included into data to be transmitted to the two or more base stations on a basis of comparison of the calculated transmitting time with time information corresponding to the leading time of the period of the period number zero (0) received from the two or more base stations the BCMCS Serving Node including a period number and a sequence number into data delivered from the content server and transmitting the data including the period number and the sequence number to the two or more base stations; in case that a synchronization is deviated or data is lost during data delivery from the two or more base stations to the radio terminals, the two or more base stations perform re-synchronization on a basis of the period number and the sequence number included in the data received from the BCMCS Serving Node.