Method for content synchronization when broadcasting data in a wireless network

• US 9,686,057 B2
• Filed: 09/23/2014
• Issued: 06/20/2017
• Est. Priority Date: 11/01/2006
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Mildh, Gunnar, Rcz, Andrs
• Primary Examiner(s): Kao, Jutai
• Application Number:
  US14/493,658
• Publication Number:
  US 20150009884A1
• Time in Patent Office: 1,001 Days
• CPC Class Codes: H04L 12/1881 with schedule organisation, e.g. priority, sequence management
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04N 21/2385 Channel allocation H04N21/266 takes precedence; Bandwidth allocation H04N21/24 takes precedence ; allocation of channels according to the instantaneous demands of the users in time-division multiplex systems H04J3/1682; admission control, resource allocation in open networks H04L12/5692; arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896; negotiating bandwidth in wireless networks H04W28/16
• CPC Class Codes: H04N 21/26208 the scheduling operation being performed under constraints
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 72/1273 of downlink data flows
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 76/40 for selective distribution or broadcast
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: H04W 92/045 between access point and backbone network device

Abstract

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.

Claims

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.