LTE MBMS SYNC protocol for support synchronisation of content

The Synchronization protocol (SYNC), which runs between the BM-SC and eNB (see [1]), was originally designed to ensure synchronized transfer of LTE Multimedia Broadcast Multicast Service (eMBMS)user data employing the multi-cell transmission mode. The BM-SC forwards the eMBMS user data, packets, after assigning the appropriate control fields defined in the SYNC protocol. The eNB buffers the eMBMS user data and re-orders the packets so that data concerning to one service is transmitted consecutively. The Time Stamp (TS) is one of the control fields´ in SYNC protocol. The BM-SC set TS according to the absolute receiving time value plus some delay. This file investigates several alternatives of BM-SC setting the TS which have the advantage comparing to the existing one.