Method and apparatus for transceiving data in a MIMO system

• US 9,014,212 B2
• Filed: 03/01/2013
• Issued: 04/21/2015
• Est. Priority Date: 03/11/2010
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Lee, Il-Gu, Lee, Sok-Kyu, CHEONG, Min Ho, Choi, Jee Yon, Lee, Jae Seung, Kim, Yun Joo, Park, Jae Woo, OH, Jong Ee
• Primary Examiner(s): WILSON, ROBERT W
• Application Number:
  US13/783,192
• Publication Number:
  US 20130177096A1
• Time in Patent Office: 781 Days
• Field of Search: None
• US Class Current: 370/473
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04L 1/0075 Transmission of coding parameters to receiver H04L1/0023 takes precedence
• CPC Class Codes: H04L 1/0083 Formatting with frames or packets; Protocol or part of protocol for error control
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 27/18 Phase-modulated carrier systems, i.e. using phase-shift keying H04L27/32 takes precedence
• CPC Class Codes: H04L 27/20 Modulator circuits; Transmitter circuits
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04L 69/323 in the physical layer [OSI layer 1]
• CPC Class Codes: H04Q 2213/13215 Code checking, CRC
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

The present invention relates to a method and apparatus for transceiving data. A method in which a transmitting terminal transmits data to a receiving terminal in a MIMO system according to one embodiment of the present invention comprises the following steps: generating a data field containing the data; generating a signal field containing information on the data field; generating a data frame containing the data field and the signal field; and transmitting the data frame to the receiving terminal. According to the present invention, an end of the frame being transmitted is accurately notified to the receiving terminal in a communication system in which the frame is transmitted using MIMO, thereby decoding the frame in a more efficient manner at the receiving terminal.

Claims

1. A method of transmitting a data block in a wireless communication system, the method comprising:

determining a target length;

generating a first padded data block by repeatedly adding a first padding to a data block so that a length of the first padded data block is less than the target length and is equal to a multiple of 4 octets;

generating a second padded data block by repeatedly adding a second padding to the first padded data block while a remaining padding space is greater than or equal to 4 bytes, wherein the remaining padding space corresponds to a value obtained by subtracting a length of the second padded data block from the target length, and,

if the remaining padding space is smaller than 4 bytes, adding a third padding to the second padded data block until the length of the second padded data block is equal to the target length; and

transmitting the second padded data block to a receiver.

2. The method of claim 1, wherein the first padding has a length of one byte, the second padding has a length of 4 bytes and the third padding has a length of one byte.

3. The method of claim 2, wherein the step of transmitting the second padded data block includes:

delivering the second padded data block from a medium access control (MAC) layer to a physical (PHY) layer;

determining, at the physical layer, a number of bits for a PHY padding based on the number of orthogonal frequency division multiplexing (OFDM) symbols used for a transmission, wherein the number of bits for a tail padding is between 0 and 7;

generating, at the physical layer, a data block by appending the PHY padding to the second padded data block; and

transmitting, at the physical layer, the data block in at least one OFDM symbol to the receiver.

4. The method of claim 3, wherein the second padded data block is delivered to the PHY layer as a physical layer convergence procedure service data unit (PSDU).

5. A transmitter of transmitting a data block in a wireless communication system, the transmitter comprising:

a processor configured for;

determining a target length;

generating a first padded data block by repeatedly adding a first padding to a data block so that a length of the first padded data block is less than the target length and is equal to a multiple of 4 bytes; and

generating a second padded data block by repeatedly adding a second padding to the first padded data block while a remaining padding space is greater than or equal to 4 bytes, wherein the remaining padding space corresponds to a value obtained by subtracting a length of the second padded data block from the target length, and,

if the remaining padding space is smaller than 4 bytes, adding a third padding to the second padded data block until the length of the second padded data block is equal to the target length; and

a transmission unit configured to transmit the second padded data block to a receiver.

6. The transmitter of claim 5, wherein the first padding has a length of one byte, the second padding has a length of 4 bytes and the third padding has a length of one byte.

7. The transmitter of claim 6, wherein the processor is configured to transmit the second padded data block by:

delivering the second padded data block from a medium access control (MAC) layer to a physical (PHY) layer;

determining, at the physical layer, a number of bits for a PHY padding based on the number of orthogonal frequency division multiplexing (OFDM) symbols used for a transmission, wherein the number of bits for a tail padding is between 0 and 7;

generating, at the physical layer, a data block by appending the PHY padding to the second padded data block; and

transmitting, at the physical layer, the data block in at least one OFDM symbol to the receiver.

8. The transmitter of claim 7, wherein the second padded data block is delivered to the PHY layer as a physical layer convergence procedure service data unit (PSDU).