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US 10,433,338 B2Granted
Method for transmitting and receiving frame in wireless local area network
AssigneeNewracom, Inc.
InventorsYongjin Kwon, Hyungu Park
Life of this patent
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Abstract
Disclosed are methods and apparatuses for transmitting and receiving a frame in a WLAN. A method for transmitting a frame, performed in a first station, may comprise receiving a first PPDU; determining whether a BSS of the first PPDU is a BSS to which the first station belongs or a BSS to which the first station does not belong; when the BSS of the first PPDU is the BSS to which the first station does not belong and a received signal strength of the first PPDU is higher than a first threshold, setting a virtual carrier sensing by using information included in a preamble of the first PPDU. Therefore, performance of the WLAN can be enhanced.
Claims16
A method for transmitting a frame, performed in a first station, the method comprising:
- receiving a first physical layer (PHY) protocol data unit (PPDU);
- determining whether a basic service set (BSS) of the first PPDU can be determined;
- in response to determining that the BSS of the first PPDU cannot be determined, when a received signal strength of the first PPDU is higher than a first threshold, setting a medium access control (MAC)-level virtual carrier sensing, wherein setting the MAC-level virtual carrier sensing includes setting a virtual carrier sensing by using duration information included in a MAC header of the first PPDU;
- in response to determining that the BSS of the first PPDU can be determined, determining whether the BSS of the first PPDU is a BSS (MyBSS) to which the first station belongs or an Other BSS (OBSS) to which the first station does not belong;
- when the BSS of the first PPDU is determined to be the OBSS:
- when the received signal strength of the first PPDU is higher than the first threshold and the first PPDU is a frame having a mode that is a High Efficiency mode and having a PHY header that includes duration information for setting a virtual carrier sensing, setting a PHY-level virtual carrier sensing, wherein setting the PHY-level virtual carrier sensing includes setting the virtual carrier sensing by using the duration information included in a PHY header of the first PPDU,
- when the received signal strength of the first PPDU is higher than the first threshold and the first PPDU is a frame having a mode of a standard previous to a standard defining the High Efficiency mode, setting a medium access control (MAC)-level virtual carrier sensing, wherein setting the MAC-level virtual carrier sensing includes setting a virtual carrier sensing by using the duration information included in the MAC header of the first PPDU, and
- when the received signal strength of the first PPDU is lower than the first threshold, trying to obtain a transmission opportunity.
5 more elements
A station comprising:
- a processor;
- and
- a memory storing at least one instruction,
- wherein the processor executes the at least one instruction to perform:
- receiving a first physical layer (PHY) protocol data unit (PPDU);
- determining whether a basic service set (BSS) of the first PPDU can be determined;
- in response to determining that the BSS of the first PPDU cannot be determined, when a received signal strength of the first PPDU is higher than a first threshold, setting a medium access control (MAC)-level virtual carrier sensing, wherein setting the MAC-level virtual carrier sensing includes setting a virtual carrier sensing by using duration information included in a MAC header of the first PPDU;
- in response to determining that the BSS of the first PPDU can be determined, determining whether the BSS of the first PPDU is a BSS (MyBSS) to which the first station belongs or an Other BSS (OBSS) to which the first station does not belong;
- and
- when the BSS of the first PPDU is determined to be the OBSS:
- when the received signal strength of the first PPDU is higher than the first threshold and the first PPDU is a frame having a mode that is a High Efficiency mode and having a PHY header that includes duration information for setting a virtual carrier sensing, setting a PHY-level virtual carrier sensing, wherein setting the PHY-level virtual carrier sensing includes setting the virtual carrier sensing by using the duration information included in a PHY header of the first PPDU,
- when the received signal strength of the first PPDU is higher than the first threshold and the first PPDU is a frame having a mode of a standard previous to a standard defining the High Efficiency mode, setting the medium access control (MAC)-level virtual carrier sensing, wherein setting the MAC-level virtual carrier sensing includes setting the virtual carrier sensing by using the duration information included in the MAC header of the first PPDU, and
- when the received signal strength of the first PPDU is lower than the first threshold, trying to obtain a transmission opportunity.
10 more elements
Dependencies are inferred from the claim text.