NAV setting method considering BSS color inactivation in wireless LAN system and apparatus therefor
AssigneeLG Electronics Inc.
InventorsJeongki Kim, Kiseon Ryu, Hangyu Cho
Life of this patent
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Abstract
When an AP detects a collision between a neighbor BSS and a BSS color in a wireless LAN system, the AP can inform an STA of the same through information indicating whether the BSS color is disabled, and set and transmit a TXOP_duration field of a transmitted frame to a specific value differentiated from a normal duration value in order to prevent an erroneous NAV setting of the STA.
Claims14
A method for an AP (access point) controlling a NAV (network allocation vector) setting of an STA (station) in a WLAN (wireless local area network) system, the method comprising:
- detecting a BSS (basic service set) color overlap with an OBSS (overlapping basic service set);
- transmitting, to the STA, a first frame containing BSS color disabled information set to a first value indicating disablement of a use of the BSS color;
- and
- transmitting, to the STA, a second frame containing a TXOP_DURATION field set to a specific value other than normal duration values in response to the AP setting the BSS color disabled information to the first value.
A method of configuring a NAV (network allocation vector) of an STA (station) in a WLAN (wireless local area network) system, the method comprising:
- receiving a first frame containing BSS (basic service set) color disabled information set to a first value indicating disablement of BSS color information, from an AP (access point);
- and
- receiving, from the AP, a second frame containing a TXOP_DURATION field set to a specific value other than normal duration values in response to the AP setting the BSS color disabled information to the first value,
- wherein, if a value of the TXOP_DURATION field is set to the specific value, the STA does not update a NAV based on the value of the TXOP_DURATION field.
An AP (access point) controlling a NAV (network allocation vector) setting of an STA (station) in a WLAN (wireless local area network) system, the AP comprising:
- a processor configured to detect a BSS (basic service set) color overlap with an OBSS (overlapping basic service set);
- and
- a transceiver configured to transmit to the STA under control of the processor,
- a first frame containing BSS color disabled information set to a first value indicating disablement of BSS color information, in response to the processor detecting a BSS color overlap, and
- a second frame containing a TXOP_DURATION field set to a specific value other than normal duration values in response to the processor setting the BSS color disabled information to the first value.
An STA (station) performing a NAV (network allocation vector) setting in a WLAN (wireless local area network) system, the STA comprising:
- a transceiver configured to receive, from an AP (access point), a first frame containing BSS color disabled information set to a first value indicating disablement of BSS (basic service set) color information, and a second frame containing a TXOP_DURATION field set to a specific value other than normal duration values in response to the AP setting the BSS color disabled information to the first value;
- and
- a processor configured not to update a NAV based on a value of the TXOP_DURATION field if the value of the TXOP_DURATION field is set to the specific value.
Dependencies are inferred from the claim text.