APPARATUS AND METHOD FOR TRANSMITTING BROADCAST CHANNEL IN BROADBAND WIRELESS ACCESS SYSTEM

• US 20110310761A1
• Filed: 06/22/2011
• Published: 12/22/2011
• Est. Priority Date: 06/22/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Mi-Hyun, Seol, Ji-Yun, Yu, Hyun-Kyu
• Granted Patent: US 10,104,679 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

To transmit and receive system information of a base station in a broadband wireless access system, operations of the base station include determining transmission periodicities of a plurality of system information subpackets periodically transmitted in a periodicity of two or more superframes, determining transmission offsets of the subpackets based on the transmission periodicities using a predefined rule for determining a transmission periodicity and a transmission offset, and transmitting the subpackets respectively according to the transmission periodicities and the transmission offsets.

Claims

1. A method for use in a base station for transmitting system information in a wireless access system, the method comprising:

determining transmission periodicities of a plurality of system information subpackets periodically transmitted in a periodicity of two or more superframes;

determining transmission offsets of the subpackets based on the transmission periodicities using a predefined rule for determining a transmission periodicity and a transmission offset; and

transmitting the subpackets respectively according to the transmission periodicities and the transmission offsets,

wherein units of the transmission periodicity and the transmission offset are the superframe.

2. The method of claim 1, further comprising:

transmitting information indicating the transmission periodicities through one of the subpackets.

3. The method of claim 2, wherein the information indicating the transmission periodicities comprises one of a plurality of indexes indicating transmission periodicities, and

the indexes are defined as shown in the following table:

4. The method of claim 1, wherein the transmission periodicities are determined by multiplying a minimum transmission periodicity by different integers.

5. The method of claim 4, wherein the minimum transmission periodicity is an integer greater than or equal to two.

6. The method of claim 1, wherein the transmission offsets are determined to values which are a predefined integer smaller than a maximum transmission periodicity of shorter transmission periodicities than a transmission periodicity of a corresponding subpacket.

7. The method of claim 1, wherein a transmission offset of a subpacket having a minimum transmission periodicity among the transmission offsets is determined to equal a value which is a predefined integer smaller than the minimum transmission periodicity, and

a transmission offset of at least one subpacket other than the subpackets having the minimum transmission periodicity among the transmission offsets is determined to equal a maximum transmission periodicity of transmission periodicities shorter than a transmission periodicity of a corresponding subpacket.

8. The method of claim 1, wherein the transmitting of the subpackets respectively according to the transmission periodicities and the transmission offsets comprises:

performing a modulo operation with a superframe number and the transmission periodicities of the subpackets; and

transmitting a subpacket having the transmission offset matching the modulo operation result.

9. A method for use in a mobile station for receiving system information in a wireless access system, the method comprising:

obtaining information indicating transmission periodicities of a plurality of system information subpackets periodically received in a periodicity of two or more superframes;

determining transmission offsets of the subpackets based on the transmission periodicities, using a predefined rule for determining a transmission periodicity and a transmission offset;

determining a superframe carrying the subpackets according to the transmission periodicities and the transmission offsets; and

attempting to decode a corresponding subpacket in the superframe carrying the subpackets,

wherein units of the transmission periodicity and the transmission offset are the superframe.

10. The method of claim 9, wherein the information indicating the transmission periodicities is received through one of the subpackets.

11. The method of claim 10, wherein the information indicating the transmission periodicities comprises one of a plurality of indexes indicating transmission periodicities, and

the indexes are defined as shown in the following table:

12. The method of claim 9, wherein the transmission offsets are determined to values which are a predefined integer smaller than a maximum transmission periodicity of shorter transmission periodicities than a transmission periodicity of a corresponding subpacket.

13. The method of claim 9, wherein a transmission offset of a subpacket having a minimum transmission periodicity among the transmission offsets is determined to equal which is a predefined integer a value smaller than the minimum transmission periodicity, and

a transmission offset of at least one subpacket other than the subpackets having the minimum transmission periodicity among the transmission offsets is determined to equal a maximum transmission periodicity of transmission periodicities shorter than the transmission periodicity of the corresponding subpacket.

14. The method of claim 9, wherein the determining of the superframe carrying the subpackets comprises:

performing a modulo operation with a superframe number and the transmission periodicities of the subpackets; and

confirming a subpacket having the transmission offset matching the modulo operation result.

15. An apparatus for use in a base station in a wireless access system, the apparatus comprising:

a controller configured to determine transmission periodicities of a plurality of system information subpackets periodically transmitted in a periodicity of two or more superframes, and determine transmission offsets of the subpackets based on the transmission periodicities using a predefined rule for determining a transmission periodicity and a transmission offset; and

a modem configured to transmit the subpackets respectively according to the transmission periodicities and the transmission offsets,

wherein units of the transmission periodicity and the transmission offset are the superframe.

16. The apparatus of claim 15, wherein the controller controls to transmit information indicating the transmission periodicities through one of the subpackets.

17. The apparatus of claim 16, wherein the information indicating the transmission periodicities comprises one of a plurality of indexes indicating transmission periodicities, and

the indexes are defined as shown in the following table:

18. The apparatus of claim 15, wherein the transmission periodicities are determined by multiplying a minimum transmission periodicity by different integers.

19. The apparatus of claim 18, wherein the minimum transmission periodicity is an integer greater than or equal to two.

20. The apparatus of claim 15, wherein the transmission offsets are determined to values which are a predefined integer smaller than a maximum transmission periodicity of shorter transmission periodicities than a transmission periodicity of a corresponding subpacket.

21. The apparatus of claim 15, wherein a transmission offset of a subpacket having a minimum transmission periodicity among the transmission offsets is determined to equal a value which is a predefined integer smaller than the minimum transmission periodicity, and

a transmission offset of at least one subpacket other than the subpackets having the minimum transmission periodicity among the transmission offsets is determined to equal a maximum transmission periodicity of transmission periodicities shorter than the transmission periodicity of the corresponding subpacket.

22. The apparatus of claim 15, wherein the controller performs a modulo operation with a superframe number and the transmission periodicities of the subpackets, and controls to transmit a subpacket having the transmission offset matching the modulo operation result.

23. An apparatus fur use in a mobile station in a wireless access system, the apparatus comprising:

a controller configured to obtain information indicating transmission periodicities of a plurality of system information subpackets periodically received in a periodicity of two or more superframes, determine transmission offsets of the subpackets based on the transmission periodicities, using a predefined rule for determining a transmission periodicity and a transmission offset, and determine a superframe carrying the subpackets according to the transmission periodicities and the transmission offsets; and

a modem configured to decode a corresponding subpacket in the superframe carrying the subpackets,

wherein units of the transmission periodicity and the transmission offset are the superframe.

24. The apparatus of claim 23, wherein the information indicating the transmission periodicities is received through one of the subpackets.

25. The apparatus of claim 24, wherein the information indicating the transmission periodicities comprises one of a plurality of indexes indicating transmission periodicities, and

the indexes are defined as shown in the following table:

26. The apparatus of claim 23, wherein the transmission offsets are determined to values which are a predefined integer smaller than a maximum transmission periodicity of shorter transmission periodicities than a transmission periodicity of a corresponding subpacket.

27. The apparatus of claim 23, wherein a transmission offset of a subpacket having a minimum transmission periodicity among the transmission offsets is determined to equal a value which is a predefined integer smaller than the minimum transmission periodicity, and

a transmission offset of at least one subpacket other than the subpackets having the minimum transmission periodicity among the transmission offsets is determined to equal a maximum transmission periodicity of transmission periodicities shorter than the transmission periodicity of the corresponding subpacket.

28. The apparatus of claim 23, wherein the controller performs a modulo operation with a superframe number and the transmission periodicities of the subpackets, and determines the superframe carrying the subpackets by confirming a subpacket having the transmission offset matching the modulo operation result.