METHOD AND APPARATUS FOR TRANSMITTING DATA IN WIRELESS COMMUNICATION SYSTEM

• US 20180343096A1
• Filed: 02/24/2016
• Published: 11/29/2018
• Est. Priority Date: 04/01/2015
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: KIM, Jinmin, KIM, Jeongki, LIM, Dongguk, CHO, Hangyu
• Granted Patent: US 10,454,650 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• 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 27/26 Systems using multi-frequency codes H04L27/32 takes precedence
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 16/28 using beam steering
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/246 where the output power of a terminal is based on a path parameter calculated in said terminal
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• 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]

Abstract

Disclosed herein is a method for transmitting data performed by a station (STA) in a Wireless LAN (WLAN) system. The method for transmitting data performed by an STA device according to the present invention includes receiving a signal from a first STA of a first Basic Service Set (BSS); obtaining Endurable Interference Margin (EIM) information and transmission power information of the first STA from the reception signal; obtaining a Predicted Interference Power (PIP) using the transmission power information of the first STA; and comparing the EIM information with the PIP, and controlling a Clear Channel Assessment (CCA) level or a transmission power according to the comparison result.

Claims

1-16. -16. (canceled)

17. A method for transmitting data performed by a station (STA) in a Wireless LAN (WLAN) system, comprising:

receiving a signal from a first STA of a first Basic Service Set (BSS) which is a different BSS from the second BSS to which the STA belongs,

wherein the reception signal comprises Endurable Interference Margin (EIM) information and transmission power information, the EIM information being obtained by using allowed error margin for a certain modulation and coding rate and received power measured by the first STA, and the transmission power information indicating a transmission power of the first STA;

determining whether to perform dynamic CCA based on the EIM information of the first STA, the transmission power information of the first STA, transmission power of the STA, and received power of the first STA; and

controlling a Clear Channel Assessment (CCA) level or a transmission power by the determination.

18. The method for transmitting data performed by an STA of claim 17, wherein HE-SIG-A field of the reception signal includes CCA enable information which indicates whether to perform the dynamic CCA or not.

19. The method for transmitting data performed by an STA of claim 17, wherein the EIM information includes at least one of EIM information for a first AP or EIM information for the first STA.

20. The method for transmitting data performed by an STA of claim 18, wherein the reception signal includes additional restriction information indicating a correction value of the EIM information based on a path-loss between the first AP or the first STA.

21. The method for transmitting data performed by an STA of claim 18, wherein the reception signal further includes beam pattern information applied by the STA when transmitting a signal according to the CCA level adjustment.

22. The method for transmitting data performed by an STA of claim 17, when the reception signal is a signal to which Orthogonal Frequency Division Multiple Access (OFDMA) scheme is applied, the EIM information indicates a single EIM value with respect to a plurality of STAs or a plurality of sub bandwidths to which a resource unit of the reception signal is allocated or indicates a plurality of EIM values.

23. The method for transmitting data performed by an STA of claim 17, when the reception signal is a signal to which Orthogonal Frequency Division Multiple Access (OFDMA) scheme is applied, the reception signal includes interference sensitivity information with respect to a plurality of sub bandwidths to which a resource unit is allocated.

24. The method for transmitting data performed by an STA of claim 17, wherein the first BSS is a different BSS from the second BSS to which the STA is belonged, and

wherein the first BSS is an Overlapping Basic Service Set (OBSS) with respect to the second BSS.

25. A station (STA) device of a wireless LAN (WLAN) system, comprising:

a radio frequency (RF) unit configured to transmit and receive a radio signal; and

a processor configured to control the RF unit,

wherein the STA device receives a signal from a first STA of a first Basic Service Set (BSS) which is a different BSS from the second BSS to which the STA belongs, determines whether to perform dynamic CCA based on Endurable Interference Margin (EIM) information of the first STA, transmission power information of the first STA, transmission power of the STA, and received power of the first STA, and controls a Clear Channel Assessment (CCA) level or a transmission power by the determination,

wherein the reception signal comprises the EIM information and the transmission power information, the EIM information being obtained by using allowed error margin for a certain modulation and coding rate and received power measured by the first STA, and the transmission power information indicating a transmission power of the first STA

26. The STA device of claim 25, wherein HE-SIG-A field of the reception signal includes CCA enable information which indicates whether to perform the dynamic CCA or not.

27. The STA device of claim 25, wherein the EIM information includes at least one of EIM information for a first AP or EIM information for the first STA.

28. The STA device of claim 26, wherein the reception signal includes additional restriction information indicating a correction value of the EIM information based on a path-loss between the first AP or the first STA.

29. The STA device of claim 25, wherein the reception signal further includes beam pattern information applied by the STA when transmitting a signal according to the CCA level adjustment.

30. The STA device of claim 25, when the reception signal is a signal to which Orthogonal Frequency Division Multiple Access (OFDMA) scheme is applied, the EIM information indicates a single EIM value with respect to a plurality of STAs or a plurality of sub bandwidths to which a resource unit of the reception signal is allocated or indicates a plurality of EIM values.

31. The STA device of claim 25, when the reception signal is a signal to which Orthogonal Frequency Division Multiple Access (OFDMA) scheme is applied, the reception signal includes interference sensitivity information with respect to a plurality of sub bandwidths to which a resource unit is allocated.

32. The STA device of claim 25, wherein the first BSS is a different BSS from a second BSS to which the STA is belonged, and

wherein the first BSS is an Overlapping Basic Service Set (OBSS) with respect to the second BSS.