Package com.facebook.openwifi.cloudsdk.ies

Class HTOperation

java.lang.Object

com.facebook.openwifi.cloudsdk.ies.HTOperation

public class HTOperation
extends Object

High Throughput (HT) Operation Element, which is potentially present in wifiscan entries. Introduced in 802.11n (2009). Refer to the 802.11 specification (section 9.4.2.56)).

Field Summary

Fields

Modifier and Type	Field	Description
byte[]	basicHtMcsSet	Indicates the HT-MCS values that are supported by all HT STAs in the BSS.
byte	channelCenterFrequencySegment2	Defines the channel center frequency for a 160 or 80+80 MHz BSS bandwidth with NSS support less than Max VHT NSS.
boolean	dualBeacon	False if no STBC beacon is transmitted; true otherwise.
boolean	dualCtsProtection	False if dual CTS protection is not required; true otherwise.
byte	htProtection	A 0 indicates no protection mode.
boolean	nongreenfieldHtStasPresent	False if all HT STAs that are associated are HT-greenfield capable or all HT peer mesh STAs are HT-greenfield capable; true otherwise.
boolean	obssNonHtStasPresent	Indicates if the use of protection for non-HT STAs by overlapping BSSs is determined to be desirable.
byte	primaryChannel	Channel number of the primary channel.
boolean	rifsMode	True if RIFS is permitted; false otherwise.
byte	secondaryChannelOffset	Indicates the offset of the secondary channel relative to the primary channel.
boolean	staChannelWidth	Defines the channel widths that can be used to transmit to the STA.
boolean	stbcBeacon	False in a primary beacon.
static int	TYPE	Defined in 802.11 table 9-92

Constructor Summary

Constructors

Constructor	Description
HTOperation(byte primaryChannel, byte secondaryChannelOffset, boolean staChannelWidth, boolean rifsMode, byte htProtection, boolean nongreenfieldHtStasPresent, boolean obssNonHtStasPresent, byte channelCenterFrequencySegment2, boolean dualBeacon, boolean dualCtsProtection, boolean stbcBeacon)	Constructs an HTOperationElement using the given field values.
HTOperation(byte primaryChannel, byte secondaryChannelOffset, boolean staChannelWidth, byte channelCenterFrequencySegment2)	Constructor with the most used parameters.
HTOperation(String htOper)	Constructs an HTOperationElement by decoding htOper.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
int	hashCode()
boolean	matchesForAggregation(HTOperation other)	Determine whether this and other "match" for the purpose of aggregating statistics.
static boolean	matchesHtForAggregation(String htOper1, String htOper2)	Determines whether two HT operation elements should have their statistics aggregated.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

TYPE

public static final int TYPE

Defined in 802.11 table 9-92

See Also:

Constant Field Values

primaryChannel

public final byte primaryChannel

Channel number of the primary channel.

secondaryChannelOffset

public final byte secondaryChannelOffset

Indicates the offset of the secondary channel relative to the primary channel. A 1 indicates that the secondary channel is above the primary channel. A 3 indicates that the secondary channel is below the primary channel. A 0 indicates that there is no secondary channel present. The value 2 is reserved.

staChannelWidth

public final boolean staChannelWidth

Defines the channel widths that can be used to transmit to the STA. With exceptions, false allows a 20 MHz channel width. True allows use of any channel width in the supported channel width set. See 802.11 for exceptions.

rifsMode

public final boolean rifsMode

True if RIFS is permitted; false otherwise.

htProtection

public final byte htProtection

A 0 indicates no protection mode. A 1 indicates nonmember protection mode. A 2 indicates 20 MHz protection mode. A 3 indicates non-HT mixed mode.

nongreenfieldHtStasPresent

public final boolean nongreenfieldHtStasPresent

False if all HT STAs that are associated are HT-greenfield capable or all HT peer mesh STAs are HT-greenfield capable; true otherwise.

obssNonHtStasPresent

public final boolean obssNonHtStasPresent

Indicates if the use of protection for non-HT STAs by overlapping BSSs is determined to be desirable. See 802.11 for details.

channelCenterFrequencySegment2

public final byte channelCenterFrequencySegment2

Defines the channel center frequency for a 160 or 80+80 MHz BSS bandwidth with NSS support less than Max VHT NSS. This is 0 for non-VHT STAs. See 802.11 for details.

dualBeacon

public final boolean dualBeacon

False if no STBC beacon is transmitted; true otherwise.

dualCtsProtection

public final boolean dualCtsProtection

False if dual CTS protection is not required; true otherwise.

stbcBeacon

public final boolean stbcBeacon

False in a primary beacon. True in an STBC beacon.

basicHtMcsSet

public final byte[] basicHtMcsSet

Indicates the HT-MCS values that are supported by all HT STAs in the BSS. A bitmap where a bit is set to 1 to indicate support for that MCS and 0 otherwise, where bit 0 corresponds to MCS 0.

Constructor Detail

HTOperation

public HTOperation(byte primaryChannel,
                   byte secondaryChannelOffset,
                   boolean staChannelWidth,
                   boolean rifsMode,
                   byte htProtection,
                   boolean nongreenfieldHtStasPresent,
                   boolean obssNonHtStasPresent,
                   byte channelCenterFrequencySegment2,
                   boolean dualBeacon,
                   boolean dualCtsProtection,
                   boolean stbcBeacon)

Constructs an HTOperationElement using the given field values. See 802.11 for more details.

For details about the parameters, see the javadocs for the corresponding member variables.

HTOperation

public HTOperation(byte primaryChannel,
                   byte secondaryChannelOffset,
                   boolean staChannelWidth,
                   byte channelCenterFrequencySegment2)

Constructor with the most used parameters.

HTOperation

public HTOperation(String htOper)

Constructs an HTOperationElement by decoding htOper.

Parameters:

htOper - a base64 encoded properly formatted HT operation element (see 802.11)

Method Detail

matchesForAggregation

public boolean matchesForAggregation(HTOperation other)

Determine whether this and other "match" for the purpose of aggregating statistics.

Parameters:

other - another HT operation element

Returns:

true if the the operation elements "match" for the purpose of aggregating statistics; false otherwise.

matchesHtForAggregation

public static boolean matchesHtForAggregation(String htOper1,
                                              String htOper2)

Determines whether two HT operation elements should have their statistics aggregated.

Parameters:

htOper1 - a base64 encoded properly formatted HT operation element (see 802.11)

htOper2 - a base64 encoded properly formatted HT operation element (see 802.11)

Returns:

true if the two inputs should have their statistics aggregated; false otherwise.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object