METHOD AND APPARATUS FOR TRANSMITTING DATA FRAME IN WLAN SYSTEM

• US 20140169357A1
• Filed: 02/21/2014
• Published: 06/19/2014
• Est. Priority Date: 06/29/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: NOH, Yu Jin, KANG, Byeong Woo, LEE, Dae Won, SEOK, Yong Ho
• Granted Patent: US 8,937,922 B2
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04W 28/20 Negotiating bandwidth
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method and station for receiving a data frame in a wireless local area network are provided. The method includes receiving, from a transmitter which has obtained a transmission opportunity (TXOP) for a bandwidth, a first data unit of a plurality of data units during the TXOP, the TXOP indicating an interval of time when the transmitter has a right to exchange frame sequences; and after receiving the first data unit, further receiving, from the transmitter, a second data unit of the plurality of data units during the TXOP, wherein a transmit bandwidth of the second data unit is selected from available bandwidths, wherein the available bandwidths include a first available bandwidth which is same as a transmit bandwidth of the first data unit and a second available bandwidth which is narrower than the transmit bandwidth of the first data unit.

Claims

1. A method of receiving a data frame by a station in a wireless local area network, the method comprising:

receiving, from a transmitter which has obtained a transmission opportunity (TXOP) for a bandwidth, a first data unit of a plurality of data units during the TXOP, the TXOP indicating an interval of time when the transmitter has a right to exchange frame sequences; and

after receiving the first data unit, further receiving, from the transmitter, a second data unit of the plurality of data units during the TXOP, wherein a transmit bandwidth of the second data unit is selected from available bandwidths, wherein the available bandwidths include a first available bandwidth which is same as a transmit bandwidth of the first data unit and a second available bandwidth which is narrower than the transmit bandwidth of the first data unit.

2. The method of claim 1, wherein the station is an Access Point (AP) station, and the transmitter is a non-AP station.

3. The method of claim 1, wherein the station is a non-AP station, and the transmitter is an AP station.

4. The method of claim 1, wherein the transmit bandwidth of the second data unit is selected by the transmitter.

5. A station configured to receive a data frame in a wireless local area network, the station comprising:

a transceiver; and

a processor operatively connected to the transceiver and configured to;

receive, from a transmitter which has obtained a transmission opportunity (TXOP) for a bandwidth, a first data unit of a plurality of data units during the TXOP, the TXOP indicating an interval of time when the transmitter has a right to exchange frame sequences; and

after receiving the first data unit, further receive, from the transmitter, a second data unit of the plurality of data units during the TXOP, wherein a transmit bandwidth of the second data unit is selected from available bandwidths, wherein the available bandwidths include a first available bandwidth which is same as a transmit bandwidth of the first data unit and a second available bandwidth which is narrower than the transmit bandwidth of the first data unit.

6. The station of claim 5, wherein the station is an Access Point (AP) station, and the transmitter is a non-AP station.

7. The station of claim 5, wherein the station is a non-AP station, and the transmitter is an AP station.

8. The station of claim 5, wherein the transmit bandwidth of the second data unit is selected by the transmitter.

9. A method of receiving a data frame by a station in a wireless local area network, the method comprising:

receiving, from a transmitter which has obtained a transmission opportunity (TXOP) for a bandwidth, a first data unit of a plurality of data units during the TXOP, the TXOP indicating an interval of time when the transmitter has a right to exchange frame sequences; and

after receiving the first data unit, further receiving, from the transmitter, a second data unit of the plurality of data units during the TXOP, wherein a transmit bandwidth of the second data unit is set to be the same or narrower than a transmit bandwidth of the first data unit.

10. The method of claim 9, wherein the station is an Access Point (AP) station, and the transmitter is a non-AP station.

11. The method of claim 9, wherein the station is a non-AP station, and the transmitter is an AP station.

12. The method of claim 9, wherein the transmit bandwidth of the second data unit is set by the transmitter.

13. A station configured to receive a data frame in a wireless local area network, the station comprising:

a transceiver; and

a processor operatively connected to the transceiver and configured to;

receive, from a transmitter which has obtained a transmission opportunity (TXOP) for a bandwidth, a first data unit of a plurality of data units during the TXOP, the TXOP indicating an interval of time when the transmitter has a right to exchange frame sequences; and

after receiving the first data unit, further receive, from the transmitter, a second data unit of the plurality of data units during the TXOP, wherein a transmit bandwidth of the second data unit is set to be the same or narrower than a transmit bandwidth of the first data unit.

14. The station of claim 13, wherein the station is an Access Point (AP) station, and the transmitter is a non-AP station.

15. The station of claim 13, wherein the station is a non-AP station, and the transmitter is an AP station.

16. The station of claim 13, wherein the transmit bandwidth of the second data unit is set by the transmitter.