METHOD AND DEVICE FOR TRANSMITTING/RECEIVING FRAME IN ACCORDANCE WITH BANDWIDTH THEREOF IN WLAN SYSTEM

• US 20150382333A1
• Filed: 10/30/2013
• Published: 12/31/2015
• Est. Priority Date: 02/15/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: SEOK, Yongho
• Granted Patent: US 9,918,342 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/188 Time-out mechanisms
• CPC Class Codes: H04L 27/0006 Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio for spectrum sharing between different networks H04W16/14
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• 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 74/0816 with collision avoidance
• CPC Class Codes: H04W 80/02 Data link layer protocols
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The present invention relates to a wireless communication system and, more specifically, provides a method and device for transmitting/receiving a frame in accordance with the bandwidth thereof in a WLAN system. The method for performing a response process in a WLAN system according to one embodiment of the present invention may comprise: a step in which a first station (STA) transmits a frame requesting a response frame to a second STA; and a step in which the first STA awaits the response frame for an ACKTimeout interval. The value of the ACKTimeout interval may be determined differently according to the preamble channel bandwidth type of the frame.

Claims

1. A method for performing a response process in a wireless local access network (WLAN) system, the method comprising:

transmitting a frame requiring a response frame to a second station (STA) by a first STA; and

waiting for the response frame during an ACKTimeout interval by the first STA,

wherein the ACKTimeout interval is set to a different value according to a preamble channel bandwidth type of the frame, and

wherein a preamble channel bandwidth of the response frame is set to a value equal to the preamble channel bandwidth type of the frame.

2. The method according to claim 1,

wherein, if the preamble channel bandwidth type of the frame is a preamble type of 1 MHz, the ACKTimeout interval is calculated based on an aPHY-RX-START-Delay value for a preamble of 1 MHz,

the aPHY-RX-START-Delay value indicates a delay time until PHY-RXSTART.indication is issued, and

the PHY-RXSTART.indication represents that a Physical Layer Convergence Procedure (PLCP) Packet Data Unit (PPDU) having a valid PLCP header starts to be received.

3. The method according to claim 1,

wherein, if the preamble channel bandwidth type of the frame is a preamble type of 2 MHz or more, the ACKTimeout interval is calculated based on an aPHY-RX-START-Delay value for a preamble of 2 MHz or more,

the aPHY-RX-START-Delay indicates a delay time until PHY-RXSTART.indication is issued, and

the PHY-RXSTART.indication represents that a Physical Layer Convergence Procedure (PLCP) Packet Data Unit (PPDU) having a valid PLCP header starts to be received.

4. The method according to claim 1,

wherein, if the frame has a preamble type of 2 MHz or more, the response frame has a type other than a preamble type of 1 MHz.

5. The method according to claim 1,

wherein, if the frame has a preamble type of 2 MHz or more, the response frame has a preamble type of 2 MHz.

6. The method according to claim 1,

wherein, if the frame has a preamble type of 1 MHz or more, the response frame has a preamble type of 1 MHz.

7. The method according to claim 1,

wherein, if the response frame is received during the ACKTimeout interval, transmission of the frame is determined to be successful.

8. The method according to claim 1,

wherein, if the response frame is not received during the ACKTimeout interval, transmission of the frame is determined to be failure and a backoff procedure is performed by the first STA when the ACKTimeout interval is ended.

9. The method according to claim 1,

wherein the frame is one of a data frame, a Request To Send (RTS) frame, and a Power Save-Poll (PS-Poll) frame.

10. The method according to claim 1,

wherein the response frame is one of an Acknowledgement (ACK) frame, a Clear To Send (CTS) frame, and a data frame.

11. The method according to claim 1,

wherein the STA is an STA operating in a Sub-1 GHz (S1G) frequency band.

12. A station (STA) for performing a response process in a wireless local access network (WLAN) system, the STA comprising:

a transceiver; and

a processor,

wherein the processor is configured to transmit a frame requiring a response frame to a second STA through the transceiver; and

wait for the response frame during an ACKTimeout interval, and

wherein the ACKTimeout interval is set to a different value according to a preamble channel bandwidth type of the frame.