Method for transmitting PPDU in wireless local area network and apparatus for the same

• US 9,113,361 B2
• Filed: 09/22/2014
• Issued: 08/18/2015
• Est. Priority Date: 04/08/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Noh, Yu Jin, Lee, Dae Won, Seok, Yong Ho
• Primary Examiner(s): Gillis, Brian J
• Assistant Examiner(s): Keller, Michael A
• Application Number:
  US14/492,975
• Publication Number:
  US 20150009979A1
• Time in Patent Office: 330 Days
• Field of Search: 370/338
• US Class Current: 1/1
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0085 when channel conditions change
• CPC Class Codes: H04W 28/065 using assembly or disassembly of packets
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A method and device for receiving a data block in a wireless communication system, the method performed by a receiver. The method includes: receiving a physical layer protocol data unit (PPDU) from a transmitter over an operating channel, the PPDU including a signal field, a Very High Throughput-Signal-A (VHT-SIG-A) field, a Very High Throughput-Signal-B (VHT-SIG-B) field and a padded data block, generating a first data block by removing zero or more physical padding bits from the padded data block in a physical layer; and generating a second data block by removing zero or more Medium Access Control (MAC) padding bits from the first data block in a MAC layer.

Claims

1. A method for receiving a data block in a wireless communication system, the method performed by a receiver and comprising:

receiving a physical layer protocol data unit (PPDU) from a transmitter over an operating channel, the PPDU including a signal field, a Very High Throughput-Signal-A (VHT-SIG-A) field, a Very High Throughput-Signal-B (VHT-SIG-B) field and a padded data block,

generating a first data block by removing zero or more physical padding bits from the padded data block in a physical layer; and

generating a second data block by removing zero or more Medium Access Control (MAC) padding bits from the first data block in a MAC layer,

wherein a number of bits for the zero or more physical padding bits is smaller than one octet,

wherein the signal field includes information related to a number of bits for the zero or more MAC padding bits,

wherein the VHT-SIG-A field includes group information indicating the receiver to receive the PPDU,

wherein the VHT-SIG-B field includes information indicating the length of the second data block, and

wherein a number of bits for the VHT-SIG-B field is determined based on a bandwidth of the operating channel.

2. The method of claim 1, wherein the VHT-SIG-A field includes a bandwidth field indicating the bandwidth of the operating channel.

3. The method of claim 1, wherein the PPDU further includes a Very High Throughput-Short Training Field (VHT-STF) and a Very High Throughput-Long Training Field (VHT-LTF).

4. The method of claim 1, wherein the number of bits for the zero or more physical padding bits is determined by:

N_PAD={Nsym N_DBPS−

8 PSDU_length−

(16+6 N_ES)} mod 8

wherein;

N_PAD indicates the number of bits for the zero or more physical padding bits and ranges from 0 to 7;

Nsym indicates a number of orthogonal frequency division multiplex (OFDM) symbols corresponding to the length of the first data block;

N_DBPS indicates a number of data bits per symbol;

PSDU_length indicates the length of the first data block;

N_ES indicates a number of binary convolution coding (BCC) encoders, and

‘

mod’

denotes modulo operation.

5. A device for wireless communication system comprising:

a processor; and

a transceiver operatively coupled to the processor and configured to transmit and receive a data block,

wherein the processor having a Medium Access Control (MAC) layer and a physical (PHY) layer is configured to;

instruct the transceiver to receive a physical layer protocol data unit (PPDU) from a transmitter over an operating channel, the PPDU including a signal field, a Very High Throughput-Signal-A (VHT-SIG-A) field, a Very High Throughput-Signal-B (VHT-SIG-B) field and a padded data block,

generate a first data block by removing zero or more physical padding bits from the padded data block in the PHY layer; and

generate a second data block by removing zero or more MAC padding bits from the first data block in the MAC layer,

wherein a number of bits for the zero or more physical padding bits is smaller than one octet,

wherein the signal field includes information related to a number of bits for the zero or more MAC padding bits,

wherein the VHT-SIG-A field includes group information indicating the device to receive the PPDU,

wherein the VHT-SIG-B field includes information indicating the length of the second data block, and

wherein a number of bits for the VHT-SIG-B field is determined based on a bandwidth of the operating channel.

6. The device of claim 5, wherein the VHT-SIG-A field includes a bandwidth field indicating the bandwidth of the operating channel.

7. The device of claim 5, wherein the PPDU further includes a Very High Throughput-Short Training Field (VHT-STF) and a Very High Throughput-Long Training Field (VHT-LTF).

8. The device of claim 5, wherein the number of bits for the zero or more physical padding bits is determined by:

N_PAD={Nsym N_DBPS−

8 PSDU_length−

(16+6 N_ES)} mod 8

wherein;

N_{PA D} indicates the number of bits for the zero or more physical padding bits and ranges from 0 to 7;

Nsym indicates a number of orthogonal frequency division multiplex (OFDM) symbols corresponding to the length of the first data block;

N_DBPS indicates a number of data bits per symbol;

PSDU_length indicates the length of the first data block;

N_ES indicates a number of binary convolution coding (BCC) encoders, and

‘

mod’

denotes modulo operation.