METHOD FOR PERFORMING BANDWIDTH REQUEST PROCESS IN WIRELESS COMMUNICATON SYSTEM

• US 20110205997A1
• Filed: 08/26/2009
• Published: 08/25/2011
• Est. Priority Date: 11/07/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Sung Ho, Cho, Hee Jeong, Ihm, Bin Chul, Ryu, Ki Seon, Chun, Jin Young
• Granted Patent: US 8,553,634 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

A method for performing a bandwidth request procedure in a wireless communication system includes: transmitting a bandwidth request indicator and a bandwidth request message through a bandwidth request channel; receiving an uplink grant message indicating uplink radio resource in response to the bandwidth request indicator and the bandwidth request message; and transmitting uplink data after receiving the uplink grant message, wherein the uplink grant message includes information regarding the type of the uplink grant message. A bandwidth request procedure can be performed quickly and effectively.

Claims

1-11. -11. (canceled)

12. A method of performing a bandwidth request (BR) for uplink transmission in a wireless communication system, the method performed in a terminal comprising:

transmitting, from the terminal to a base station (BS), a first signal comprising a BR indicator including a sequence and a BR message comprising data associated with a bandwidth request;

wherein the BR message further comprises a cyclic redundancy check (CRC) for error detection, the first signal is transmitted via a BR channel comprising a plurality of BR tiles, and each BR tile consists of a plurality of contiguous subcarriers in a frequency domain on a plurality of contiguous orthogonal frequency division multiplexing (OFDM) symbols in a time domain.

13. The method of claim 12, wherein when the BR message is decoded the method for performing a bandwidth request further comprises:

receiving, in response to the BR message, a second signal indicating a grant for uplink transmission; and

transmitting, in response to the grant for uplink transmission, uplink data to the base station.

14. The method of claim 12, wherein when the error is detected the method for performing a bandwidth request further comprises:

receiving, in response to the first signal, a third signal indicating a grant for a message for a bandwidth request;

transmitting, in response to the grant, the message for a bandwidth request; and

receiving, in response to the message for a bandwidth request, a grant for uplink transmission.

15. The method of claim 12, wherein the data associated with a bandwidth request is associated with at least a portion of an identifier (ID) for the terminal, and the ID consists of 12 bits.

16. The method of claim 12, wherein each BR tile consists of 6 contiguous subcarriers in a frequency domain on 6 contiguous OFDM symbols in a time domain.

17. The method of claim 12, wherein the BR channel consists of three BR tiles, and the three BR tiles are distributed in a frequency domain.

18. The method of claim 12, wherein the bandwidth request is a contention-based bandwidth request.

19. The method of claim 12, wherein the sequence included in the BR indicator is selected from orthogonal sequences or quasi-orthogonal sequences.

20. A terminal for performing a bandwidth request (BR) for uplink transmission in a wireless communication system, the terminal comprising:

a radio frequency unit configured for transmitting, to a base station (BS), a first signal comprising a BR indicator including a sequence and a BR message comprising data associated with a bandwidth request;

wherein the BR message further comprises a cyclic redundancy check (CRC) for error detection, the first signal is transmitted via a BR channel comprising a plurality of BR tiles, and each BR tile consists of a plurality of contiguous subcarriers in a frequency domain on a plurality of contiguous orthogonal frequency division multiplexing (OFDM) symbols in a time domain.

21. The terminal of claim 20, wherein when the BR message is decoded the radio frequency unit is further configured for:

receiving, in response to the BR message, a second signal indicating a grant for uplink transmission; and

transmitting, in response to the grant for uplink transmission, uplink data to the base station,

22. The terminal of claim 20, wherein when the error is detected the radio frequency unit is further configured for:

receiving, in response to the first signal, a third signal indicating a grant for a message for a bandwidth request;

transmitting, in response to the grant, the message for a bandwidth request; and

receiving, in response to the message for a bandwidth request, a grant for uplink transmission.

23. The terminal of claim 20, wherein the data associated with a bandwidth request is associated with at least a portion of an identifier (ID) for the terminal, and the ID consists of 12 bits.

24. The terminal of claim 20, wherein each BR tile consists of 6 contiguous subcarriers in a frequency domain on 6 contiguous OFDM symbols in a time domain.

25. The terminal of claim 20, wherein the BR channel consists of three BR tiles, and the three BR tiles are distributed in a frequency domain.

26. The terminal of claim 20, wherein the bandwidth request is a contention-based bandwidth request.

27. The terminal of claim 20, wherein the sequence included in the BR indicator is selected from orthogonal sequences or quasi-orthogonal sequences.