Method and apparatus for transmitting and receiving broadcast data using outer-coding

• US 7,359,357 B2
• Filed: 03/18/2005
• Issued: 04/15/2008
• Est. Priority Date: 03/18/2004
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Rhee, Jong-Hun, Kim, Min-Goo, Bae, Beom-Sik, Kim, Su-Yean
• Primary Examiner(s): Cumming; William D.
• Application Number:
  US11/083,341
• Publication Number:
  US 20050243775A1
• Time in Patent Office: 1,124 Days
• Field of Search: 370/336, 370/347, 455/91, 455/130
• US Class Current: 370/336
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/0078 Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location forward error control, e.g. FEC, CRC H04L1/004; adaptive formatting H04L1/0006; mappings H04L27/00
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Abstract

A method and apparatus for transmitting and receiving a broadcast service in a mobile communication system which outer-codes frames for a plurality of broadcast services and Time Domain Multiplex (TDM)-transmits the outer-coded frames. A transmitter transmits a broadcast parameter message comprising information indicating a specific sub-buffer in which respective broadcast services are stored. A receiver for receiving the broadcast parameter message from the transmitter, and maps the sub-buffer to a corresponding sub-block mask based on the broadcast parameter message. The transmitter TDM-transmits the frames for the plurality of broadcast services per sub-block. The receiver selectively receives frames for a desired broadcast service using the sub-block mask and decodes the selectively received frames.

Claims

1. A method for providing a broadcast service in a mobile communication system which outer-codes frames for a plurality of broadcast services, the method comprising the steps of:

generating a broadcast parameter message comprising information indicating at least one sub-buffer in which frames for a requested broadcast service are stored; and

transmitting the broadcast parameter message.

2. The method of claim 1, wherein the information indicating at least one sub-buffer comprises mask information per sub-block.

3. The method of claim 2, wherein the broadcast parameter message comprises mask information of a super frame period predefined for a plurality of sub-blocks.

4. The method of claim 1, wherein the at least one sub-buffer is selected from 4 different sub-buffers included in the receiver.

5. The method of claim 1, further comprising the step of:

indicating whether to perform a sub-block based TDM transmission using a reserved bit of another broadcast parameter message defined in a slot based TDM transmission, if the sub-block based TDM transmission and the slot based TDM transmission are selectively used.

6. The method of claim 1, further comprising the steps of:

if a slot based TDM transmission is performed, transmitting another broadcast parameter message including TDM mask information indicating frames for the requested broadcast service.

7. A method comprising:

generating a broadcast data stream having data frames for each of a plurality of broadcast services in a mobile communication system;

storing the broadcast data stream in a plurality of buffers so that each buffer contains data frames of no more than one broadcast service; and

outer-coding the stored data frames of each buffer; and

transmitting the outer-coded data frames.

8. The method of claim 7, wherein the generating a broadcast data stream comprises arranging the broadcast data stream to have a corresponding order of the plurality of broadcast services associated with continuous data frames in the broadcast data stream being repeated in the broadcast data stream.

9. The method of claim 7, wherein the storing comprises storing a data frame in each of the plurality of buffers in an evenly cyclical turn.

10. A method for receiving a broadcast service in a mobile communication system which outer-codes frames for a plurality of broadcast services, the method comprising the steps of:

receiving a broadcast parameter message comprising information indicating at least one sub-buffer in which frames for a desired broadcast service are stored; and

selectively receiving the frames for the desired broadcast service based on the information.

11. The method of claim 10, further comprising the step of:

decoding the selectively received frames.

12. The method of claim 10, further comprising the step of:

mapping the sub-buffer to a corresponding sub-block mask based on the broadcast parameter message.

13. The method of claim 10, wherein the information indicating a specific sub-buffer comprises mask information per sub-block.

14. The method of claim 10, wherein the broadcast parameter message comprises mask information of a super frame period predefined for a plurality of sub-blocks.

15. The method of claim 10, wherein the step of selectively receiving the frames for the desired broadcast service further comprises the steps of:

calculating a sub-block index for the received broadcast frames; and

checking a mask value of a sub-block mask corresponding to a position of the sub-block index to determine whether to receive corresponding broadcast frames.

16. The method of claim 15, wherein the sub-buffer index is calculated by

sub_block_index=(i mod 4)+4×

(└

i/64┘

mod TDM_SUB_BLOCK_PERIOD)

where ‘

mod’

means a modulo operation, ‘

└

┘

’

means an integer being equal to a value of i/64 or a maximum integer approximating the value, and TDM_SUB_BLOCK_PERIOD means a period of 4 predefined TDM sub-blocks.

17. A transmission apparatus for providing a broadcast service in a mobile communication system which outer-codes frames for a plurality of broadcast services, the apparatus comprising:

a message generator for generating a broadcast parameter message comprising information indicating each sub-buffer in which frames for each broadcast service are stored; and

a radio frequency (RF) module for transmitting the broadcast parameter message.

18. The transmission apparatus of claim 17, wherein the information indicating each sub-buffer includes mask information per sub-block.

19. The transmission apparatus of claim 18, wherein the broadcast parameter message includes mask information of a super frame period predefined for a plurality of sub-blocks.

20. The transmission apparatus of claim 17, wherein if sub-block based TDM transmission and slot based TDM transmission are selectively used, the message generator inserts, into the broadcast parameter message, an indicator indicating whether to perform the sub-block based TDM transmission using a reversed bit of another broadcast parameter message defined in the slot based TDM transmission.

21. A transmission apparatus for providing a broadcast service in a mobile communication system which outer-codes frames for a plurality of broadcast services, the apparatus comprising:

a controller for demuxing broadcast data per sub-blocks to assign the broadcast data to at least one sub-buffer in which frames for a requested broadcast service are stored;

an outer encoder for outer-coding the frames for the plurality of broadcast services per sub-buffers; and

a radio frequency (RF) module for transmitting the outer-coded frames for the plurality of broadcast services.

22. A reception apparatus for receiving a broadcast service in a mobile communication system which outer-codes frames for a plurality of broadcast services, the apparatus comprising:

a radio frequency (RF) module for receiving from a transmitter a broadcast parameter message comprising information indicating a specific sub-buffer in which frames for a desired broadcast service are stored and selectively receiving the frames for the desired broadcast service among the plurality of broadcast service;

a decoder for decoding the selectively received frames for a broadcast service, stored in the indicated sub-buffer; and

a controller for instructing the radio frequency (RF) module selectively to receive the frames for the desired broadcast service among the plurality of broadcast service based on the information.

23. The reception apparatus of claim 22, wherein the information indicating a specific sub-buffer comprises mask information per sub-block.

24. The reception apparatus of claim 23, wherein the broadcast parameter message comprises mask information of a super frame period predefined for a plurality of sub-blocks.

25. The reception apparatus of claim 22, wherein the controller calculates a sub-block index for the received broadcast frames and a mask value of the sub-block mask corresponding to a position of the sub-block index to determine whether to receive corresponding broadcast frames.

26. The reception apparatus of claim 25, wherein the sub-block index is calculated by

sub_block_index=(i mod 4)+4×

(└

i/64┘

mod TDM_SUB_BLOCK_PERIOD)

where ‘

mod’

means a modulo operation, ‘

└

┘

’

means an integer being equal to a value of i/64 or a maximum integer approximating the value, and TDM_SUB_BLOCK_PERIOD means a period of 4 predefined TDM sub-blocks.