Apparatus and method for data transmission in wireless communication system

• US 8,630,212 B2
• Filed: 11/23/2009
• Issued: 01/14/2014
• Est. Priority Date: 11/27/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Moon, Sung Ho, Kwak, Jin Sam, Han, Seung Hee
• Primary Examiner(s): CHAN, SAI MING
• Application Number:
  US13/131,600
• Publication Number:
  US 20110261730A1
• Time in Patent Office: 1,513 Days
• Field of Search: 370/280, 370/281, 370/441
• US Class Current: 370/281
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/2603 Signal structure ensuring backward compatibility with legacy system
• CPC Class Codes: H04L 27/2626 Arrangements specific to the transmitter only
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex

Abstract

A data transmitter for a wireless communication system is provided. Said apparatus comprises an OFDM (Orthogonal Frequency Division Multiplexing) symbol generating part that generates a plurality of OFDM symbols, a frame configuration part that configures a frame comprising includes said plurality of OFDM symbols, and a transmission part that transmits said plurality of OFDM symbols based on said frame that has been configured. Said frame is divided into a plurality of sub-frames, the number of OFDM symbols that are included in an optional sub-frame is any one of 5, 6, and 7, and the bandwidth of said wireless communication system is 8.75 MHz. Based on a new frame configuration, new parameter requirements may be satisfied taking backward compatibility into account.

Claims

1. A data transmission apparatus in a wireless communication system, the apparatus comprising:

an orthogonal frequency division multiple access (OFDMA) symbol generation unit for generating a plurality of OFDMA symbols which constitute a frame including seven subframes, wherein a ratio of a cyclic prefix (CP) and a useful symbol time in each of the plurality of OFDMA symbols is 1/8; and

a transmission unit for transmitting data through the frame,

wherein at least one subframe among the seven subframes includes 6 OFDMA symbols and at least one other subframe among the seven subframes includes 7 OFDMA symbols;

wherein a system bandwidth of the wireless communication system is 8.75 MHz.

2. The apparatus of claim 1, wherein each subframe among the seven subframes includes a downlink (DL) frequency band for DL transmission and an uplink (UL) frequency band for UL transmission based on a frequency division duplex (FDD) scheme.

3. The apparatus of claim 2, wherein one subframe among the seven subframes includes 7 OFDMA symbols, and each of the remaining subframes among the seven subframes includes 6 OFDMA symbols.

4. The apparatus of claim 3, wherein the one subframe including 7 OFDMA symbols is a fourth subframe among the seven subframes.

5. The apparatus of claim 1, wherein the seven subframes further include a plurality of DL subframes for DL transmission and a plurality of UL subframes for UL transmission based on a time division duplex (TDD) scheme.

6. The apparatus of claim 5, wherein a transmission/reception (TX/RX) gap is inserted between the plurality of DL subframes and the plurality of UL subframes.

7. The apparatus of claim 6, wherein the TX/RX gap occupies one OFDMA symbol in the frame.

8. The apparatus of claim 5, wherein a ratio of a number of the plurality of DL subframes and a number of the plurality of UL subframes is one of 5:

2, 4;

3, or 3;

4.

9. The apparatus of claim 5, wherein each of the plurality of DL subframes include 6 OFDMA symbols, and wherein each of the plurality of UL subframes include 6 OFDMA symbols.

10. The data transmission method in a wireless communication system, the method comprising:

generating a plurality of orthogonal frequency division multiple access (OFDMA) symbols which constitute a frame including seven subframes, wherein a ratio of a cyclic prefix (CP) and a useful symbol time in each of the plurality of OFDMA symbols is 1/8; and

transmitting data through the frame,

wherein at least one subframe among the seven subframes includes 6 OFDMA symbols and at least one other subframe among the seven subframes includes 7 OFDMA symbols; and

wherein a system bandwidth of the wireless communication system is 8.75 MHz.

11. The method of claim 10, wherein each subframe among the seven subframes includes a downlink (DL) frequency band for DL transmission and an uplink (UL) frequency band for UL transmission based on a frequency division duplex (FDD) scheme.

12. The method of claim 10, wherein the seven subframes include a plurality of DL subframes for DL transmission and a plurality of UL subframes for UL transmission based on a time division duplex (TDD) scheme.