Method for content synchronization when broadcasting data in a wireless network
The present disclosure relates to base station and method for content synchronization when broadcasting data in a communications network. The base station comprises a receiver receiving data sequences and a transmitter for transmitting data sequences. Each data sequence has a data size and comprises a sequence number (SN). The base station further comprises a processing arrangement configured to add byte numbered sequence numbers to said data sequences passed between layers in a protocol stack for transmission to a transceiver station.
1. A base station for content synchronization when broadcasting data in a communications network, the base station comprising:
a receiver configured to receive data sequences (PDUs);
a transmitter configured to transmit data sequences, wherein each data sequence has a data size and comprises a packet level sequence number, and wherein each data sequence comprises added byte level numbered sequence numbers passed between layers in a protocol stack; and
processing circuitry configured to map said received data sequence to a corresponding radio resource block by relying on a byte numbering and on pre-configured transport block (TB) sizes.
2. The base station of claim 1 , wherein said data sequences are multimedia data sequences.
3. The base station of claim 1 , wherein said data sequences are fixed size TBs.
4. The base station of claim 1 , wherein said data sequences are variable size TBs.
5. The base station of claim 1 , wherein the size of said TBs is assumed to be pre-configured by a Multimedia Broadcast Multicast Service (MBMS) radio resource control entity before the start of a MBMS service.
6. The base station of claim 1 , wherein said processing circuitry is configured to determine if a PDU is lost and which PDU or which part of a PDU should be used to resume transmission.
7. The base station of claim 6 , wherein said processing circuitry is configured to determine a PDU with partial content.
8. The base station of claim 7 , wherein said processing circuitry is configured to use a sequence number of a subsequent received PDU and a sequence number of a last received PDU to determine the lost number of bytes of data and determine transmission continuation with subsequent PDU in forgoing TB.
9. The base station of claim 6 , wherein a Multiple Access Control (MAC) protocol header within said TB is variable.
10. The base station of claim 6 , wherein a Multiple Access Control (MAC) protocol header within said TB is variable and the base station receives a data sequence with size of a MAC overhead corresponding to a PDU added to the byte sequence number assigned to said FDU.
11. The base station of claim 1 , further comprising a buffer configured to receive data sequences comprising a packet header and no user data part, said packet header further including a byte level sequence number, which is set according to a virtual data associated with said data sequence.
12. The base station of claim 1 , wherein the processing circuitry is configured to transmit a packet, P, with byte count b(P) at a time where an internal byte count is B(t)=b(P), where t is a current time maintain relating to an internal byte sequence number that counts transport block containers having elapsed up said current time (t), B(t) is an elapsed transport block containers up to time t.
13. The base station of claim 1 , wherein said transport blocks are configured by a central control entity (MCE) in the network to be used for an MBMS transmission at each base station and designate an absolute time for transmission started.
14. The base station of claim 13 , wherein a transport block configuration comprises one or several of: transport block encoding format, time-frequency resources assigned, and recurrence pattern in time.