Transmitting/receiving device and method in wireless communication system

• US 10,320,601 B2
• Filed: 08/24/2015
• Issued: 06/11/2019
• Est. Priority Date: 08/25/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Wookbong, Choi, Jinsoo, Lim, Dongguk, Chun, Jinyoung, Cho, Hangyu
• Primary Examiner(s): Corrielus, Jean B
• Application Number:
  US15/506,651
• Publication Number:
  US 20180159714A1
• Time in Patent Office: 1,387 Days
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/061 using feedback from receiving side
• CPC Class Codes: H04B 7/0669 using different channel coding between antennas space-time coding H04L1/0618
• CPC Class Codes: H04L 27/26 Systems using multi-frequency codes H04L27/32 takes precedence
• CPC Class Codes: H04L 27/2607 Cyclic extensions
• CPC Class Codes: H04L 27/26132 using repetition
• CPC Class Codes: H04L 27/2691 involving interference determination or cancellation
• CPC Class Codes: H04L 27/2698 double density OFDM/OQAM system, e.g. OFDM/OQAM-IOTA system
• CPC Class Codes: H04L 65/40 Support for services or applications
• CPC Class Codes: H04L 69/323 in the physical layer [OSI layer 1]
• CPC Class Codes: H04W 28/22 Negotiating communication rate
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies

Abstract

Disclosed herein is a station (STA) device of a wireless LAN (WLAN) system. The STA device includes a radio frequency (RF) unit sending and receiving a radio signal and a processor controlling the RF unit. The processor may generate a physical protocol data unit (PPDU) including a physical preamble and a data field and send the PPDU using the RF unit.

Claims

1. An access point (AP) device in a wireless local area network (WLAN) system, the AP device comprising:

a transceiver; and

a processor,

wherein the processor is configured to;

generate a physical protocol data unit (PPDU) including a physical preamble and a data field, and

control the transceiver to send the PPDU to one or more stations (STAs) by spatial multiplexing a plurality of streams,

wherein the physical preamble includes a legacy preamble and a high efficiency (HE) preamble,

wherein the HE preamble includes an HE signal A (HE-SIG-A) field, an HE signal B (HE-SIG-B) field, an HE-short training field (STF), and an HE-long training field (LTF), the HE-SIG-B field being located in front of the HE-STF and the HE-LTF,

wherein an HE-LTF sequence for each of the plurality of streams is mapped to frequency resources in a single symbol, and

wherein HE-LTF sequences for one or more streams mapped to a same subcarrier among the plurality of streams are code division multiplexed by a P matrix to generate a multiplexed HE-LTF.

2. The AP device of claim 1, wherein the HE-SIG-B field is encoded in a bandwidth unit forming a channel and transmitted.

3. The AP device of claim 1, wherein the multiplexed HE-LTF is repeated at tone intervals of a specific number in a frequency domain.

4. The AP device of claim 3, wherein the specific number is 2 or 4.

5. A method for transmitting, by an access point (AP) device, data in a wireless local area network (WLAN) system, the method comprising:

generating a physical protocol data unit (PPDU) including a physical preamble and a data field; and

sending the PPDU to one or more stations (STAs) by spatial multiplexing a plurality of streams,

wherein the physical preamble includes a legacy preamble and a high efficiency (HE) preamble,

wherein the HE preamble includes an HE signal A (HE-SIG-A) field, an HE signal B (HE-SIG-B) field, an HE-short training field (STF), and an HE-long training field (LTF), the HE-SIG-B field being located in front of the HE-STF and the HE-LTF,

wherein an HE-LTF sequence for each of the plurality of streams is mapped to frequency resources in a single symbol, and

wherein HE-LTF sequences for one or more streams mapped to a same subcarrier among the plurality of streams are code division multiplexed by a P matrix to generate a multiplexed HE-LTF.

6. The method of claim 5, wherein the HE-SIG-B field is encoded in a bandwidth unit forming a channel and transmitted.

7. The method of claim 5, wherein the multiplexed HE-LTF is repeated at tone intervals of a specific number in a frequency domain.

8. The method of claim 7, wherein the specific number is 2 or 4.