Method and device for transmitting/receiving frame in accordance with bandwidth thereof in WLAN system

• US 9,918,342 B2
• Filed: 10/30/2013
• Issued: 03/13/2018
• 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
• Primary Examiner(s): Sweet, Lonnie
• Application Number:
  US14/768,024
• Publication Number:
  US 20150382333A1
• Time in Patent Office: 1,595 Days
• Field of Search: None
• 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, by a first station (STA), a frame requiring a response frame to a second STA;

waiting, by the first STA, for the response frame during an ACKTimeout interval configured differently according to whether a preamble channel bandwidth type of the frame is a 1 MHz preamble type or is a 2 MHz or more preamble type; and

determining, by the first STA, that transmission of the frame has failed and performing, by the first STA, a backoff procedure, when the ACKTimeout interval is ended,

wherein the configured ACKTimeout interval is determined based on a value of an aPHY-RX-START-Delay set to a different value according to whether the preamble channel bandwidth type of the frame is the 1 MHz preamble type or is the 2 MHz or more preamble type, 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 the 1 MHz preamble type, the ACKTimeout interval is calculated based on the aPHY-RX-START-Delay value for the 1 MHz preamble type,

wherein the aPHY-RX-S TART-Delay value indicates a delay time until 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 the 2 MHz or more preamble type, the ACKTimeout interval is calculated based on the aPHY-RX-START-Delay value for the 2 MHz or more preamble type,

wherein the aPHY-RX-START-Delay indicates a delay time until 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 the frame is one of a data frame, a Request To Send (RTS) frame, and a Power Save-Poll (PS-Poll) frame.

5. 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.

6. The method according to claim 1,

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

7. The method according to claim 1, wherein a value of the aPHY-RX-START-Delay when the preamble channel bandwidth type of the frame is the 1 MHz preamble type is greater by 320 micro-seconds than a value of aPHY-RX-START-Delay when the preamble channel bandwidth type of the frame is the 2 MHz or more preamble type.

8. The method according to claim 1, wherein the backoff procedure includes a retransmission of the frame.

9. 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;

controls the transceiver to transmit a frame requiring a response frame to a second STA through the transceiver;

waits for the response frame during an ACKTimeout interval configured differently according to whether a preamble channel bandwidth type of the frame is a 1 MHz preamble type or is a 2 MHz or more preamble type; and

determines that transmission of the frame has failed and performing, by the first STA, a backoff procedure, when the ACKTimeout interval is ended,

wherein the configured ACKTimeout interval is determined based on a value of an aPHY-RX-START-Delay set to a different value according to whether the preamble channel bandwidth type of the frame is the 1 MHz preamble type or is the 2 MHz or more preamble type, 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.

10. The STA according to claim 9,

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

wherein the aPHY-RX-S TART-Delay value indicates a delay time until a Physical Layer Convergence Procedure (PLCP) Packet Data Unit (PPDU) having a valid PLCP header starts to be received.

11. The STA according to claim 9,

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

wherein the aPHY-RX-START-Delay indicates a delay time until a Physical Layer Convergence Procedure (PLCP) Packet Data Unit (PPDU) having a valid PLCP header starts to be received.

12. The STA according to claim 9, wherein the frame is one of a data frame, a Request To Send (RTS) frame, and a Power Save-Poll (PS-Poll) frame.

13. The STA according to claim 9, wherein the response frame is one of an Acknowledgement (ACK) frame, a Clear To Send (CTS) frame, and a data frame.

14. The STA according to claim 9, wherein the STA is an STA operating in a Sub-1 GHz (S1G) frequency band.

15. The STA according to claim 9, wherein a value of the aPHY-RX-START-Delay when the preamble channel bandwidth type of the frame is the 1 MHz preamble type is greater by 320 micro-seconds than a value of aPHY-RX-START-Delay when the preamble channel bandwidth type of the frame is the 2 MHz or more preamble type.

16. The STA according to claim 9, wherein the backoff procedure includes a retransmission of the frame.