Apparatus and method for indicating uplink resource allocation in broadband wireless communication system

• US 9,432,980 B2
• Filed: 05/17/2011
• Issued: 08/30/2016
• Est. Priority Date: 05/17/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Mi-Hyun, Yu, Hyun-Kyu
• Primary Examiner(s): MUSA, ABDELNABI O
• Application Number:
  US13/109,347
• Publication Number:
  US 20110280202A1
• Time in Patent Office: 1,932 Days
• Field of Search: 370/322, 370/329, 370/341, 370/348, 370/443, 455/517, 455/219, 455/225, 455/551, 455/560
• US Class Current: 1/1
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

An apparatus and a method for indicating uplink resource allocation in a broadband wireless communication system are provided. The method includes decoding an UpLink (UL) resource allocation Information Element (IE) in a received DownLink (DL) subframe, extracting an indicator field value from the decoded UL resource allocation IE, the indicator field value indicating a Transmission Time Interval (TTI) type for a resource allocated to the terminal and a UL subframe location, and transmitting UL data through a resource allocated to the terminal based on the extracted indicator field value.

Claims

1. An operating method of a terminal in a wireless communication system, the operating method comprising:

receiving uplink (UL) resource allocation information through a downlink (DL) subframe;

identifying at least one UL subframe corresponding to the DL subframe based on a ratio of the DL to the UL;

identifying, based on the UL resource allocation information, a number of the at least one UL subframe, and at least one index of the at least one UL subframe, a 2-bit value indicating a transmission time interval (TTI) type and a location of one UL subframe within the at least one UL subframe; and

transmitting UL data based on the location of the UL subframe and the TTI type indicated by the 2-bit value of the UL resource allocation information,

wherein the 2-bit value is set to one of;

‘

00’

indicating that the TTI type is a long TTI,

‘

01’

indicating that the TTI type is a default TTI and a first UL subframe within the at least one UL subframe,

‘

10’

indicating that the TTI type is the default TTI and a second UL subframe within the at least one UL subframe, and

‘

11’

indicating that the TTI type is the default TTI and a third UL subframe within the at least one UL subframe.

2. The operating method of claim 1, wherein, when the TTI type is the long TTI, transmitting the UL data through three UL subframes.

3. The operating method of claim 1, wherein, when the TTI type is the default TTI, transmitting the UL data through one UL subframe having a location indicated by the TTI type.

4. The operating method of claim 1, wherein the UL resource allocation information comprises an UL basic assignment A-MAP information element (IE).

5. An operating method of a base station in a wireless communication system, the operating method comprising:

encoding uplink (UL) resource allocation information including a 2-bit value indicating a transmission time interval (TTI) type and a location of one UL subframe within at least one UL subframe; and

transmitting the UL resource allocation information to a terminal through a downlink (DL) subframe; and

receiving UL data based on the location of the UL subframe and the TTI type indicated by the 2-bit value,

wherein the 2-bit value is identified, by the terminal, based on the UL resource allocation information, a number of the at least one UL subframe, and at least one index of the at least one UL subframe corresponding to the DL subframe, and

wherein the 2-bit value is set to one of;

‘

00’

indicating that the TTI type is a long TTI,

‘

01’

indicating that the TTI type is a default TTI and a first UL subframe within the at least one UL subframe,

‘

10’

indicating that the TTI type is the default TTI and a second UL subframe within the at least one UL subframe, and

‘

11’

indicating that the TTI type is the default TTI and a third UL subframe within the at least one UL subframe.

6. The operating method of claim 5, wherein, when the TTI type is the long TTI, receiving, from the terminal, the UL data through three UL subframes.

7. The operating method of claim 5, wherein, when the TTI type is the default TTI, receiving, from the terminal, the UL data through one UL subframe having a location indicated by the TTI type.

8. The operating method of claim 5, wherein the UL resource allocation information comprises an UL basic assignment A-MAP information element (IE).

9. An apparatus of a terminal in a wireless communication system, the apparatus comprising:

a receiver configured to receive uplink (UL) resource allocation through a downlink (DL) subframe; and

a processor configured to identify at least one UL subframe corresponding to the DL subframe based on a ratio of the DL to the UL, identify, based on the UL resource allocation information, a number of the at least one UL subframe, and at least one index of the at least one UL subframe, a 2-bit value indicating a transmission time interval (TTI) type and a location of one UL subframe within at least one UL subframe; and

a transmitter configured to transmit UL data based on the location of the UL subframe and the TTI type indicated by the 2-bit value of the UL resource allocation information,

wherein the 2-bit value is set to one of;

‘

00’

indicating that the TTI type is a long TTI,

‘

01’

indicating that the TTI type is a default TTI and a first UL subframe within the at least one UL subframe,

‘

10’

indicating that the TTI type is the default TTI and a second UL subframe within the at least one UL subframe, and

‘

11’

indicating that the TTI type is the default TTI and a third UL subframe within the at least one UL subframe.

10. The apparatus of claim 9, wherein the transmitter is configured to transmit the UL data through three UL subframes, when the TTI type is the long TTI.

11. The apparatus of claim 9, wherein the transmitter is configured to transmit the UL data through one UL subframe having a location indicated by the TTI type, when the TTI type is the default TTI.

12. An apparatus of a base station in a wireless communication system, the apparatus comprising:

a processor configured to encode uplink (UL) resource allocation information including a 2-bit value indicating a transmission time interval (TTI) type and a location of one UL subframe within at least one UL subframe; and

a transmitter configured to transmit the UL resource allocation information to a terminal through the a downlink (DL) subframe, and to receive UL data based on the location of the UL subframe and the TTI type indicated by the 2-bit value,

wherein the 2-bit value is identified, by the terminal, based on the UL resource allocation information, a number of the at least one UL subframe, and at least one index of the at least one UL subframe corresponding to the DL subframe,

wherein the 2-bit value is set to one of;

‘

00’

indicating that the TTI type is a long TTI,

‘

01’

indicating that the TTI type is a default TTI and a first UL subframe within the at least one UL subframe,

‘

10’

indicating that the TTI type is the default TTI and a second UL subframe within the at least one UL subframe, and

‘

11’

indicating that the TTI type is the default TTI and a third UL subframe within the at least one UL subframe.

13. The apparatus of claim 12, wherein the receiver is configured to receive, from the terminal, the UL data through three UL subframes, when the TTI type is the long TTI.

14. The apparatus of claim 12, wherein the receiver is configured to receive, from the terminal, the UL data through one UL subframe, when the TTI type is the default TTI.