public final class Dot112040BssCoexistenceElement extends Dot11InformationElement
1 1 1 +-----------------+-----------------+-----------------+ | Element ID | Length |Information field| +-----------------+-----------------+-----------------+ Element ID: 72The 20/40 BSS Coexistence element is used by STAs to exchange information that affects 20/40 BSS coexistence. The structure of the 20/40 BSS Coexistence Information field is as follows:
B0 B1 B2 B3 B4 B5,6,7 +-------------+-------------+-------------+-------------+-------------+-------------+ |Information |Forty MHz |20 MHz BSS |OBSS Scanning|OBSS Scanning| Reserved | |Request |Intolerant |Width Request|Exemption |Exemption | | | | | |Request |Grant | | +-------------+-------------+-------------+-------------+-------------+-------------+The Information Request field is used to indicate that a transmitting STA is requesting the recipient to transmit a 20/40 BSS Coexistence Management frame with the transmitting STA as the recipient. The Forty MHz Intolerant field is set to 1 to prohibit an AP that receives this information or reports of this information from operating a 20/40 MHz BSS. When equal to 0, it does not prohibit a receiving AP from operating a 20/40 MHz BSS. This field is used for inter-BSS communication. The definition of this field is the same as the definition of the Forty MHz Intolerant field in the HT Capabilities element. The 20 MHz BSS Width Request field is set to 1 to prohibit a receiving AP from operating its BSS as a 20/40 MHz BSS. Otherwise, it is set to 0. This field is used for intra-BSS communication. The OBSS Scanning Exemption Request field is set to 1 to indicate that the transmitting non-AP STA is requesting the BSS to allow the STA to be exempt from OBSS scanning. Otherwise, it is set to 0. The OBSS Scanning Exemption Request field is reserved when transmitted by an AP. The OBSS Scanning Exemption Request field is reserved when a 20/40 BSS Coexistence element is included in a group addressed frame. The OBSS Scanning Exemption Grant field is set to 1 by an AP to indicate that the receiving STA is exempted from performing OBSS Scanning. Otherwise, it is set to 0. The OBSS Scanning Exemption Grant field is reserved when transmitted by a non-AP STA. The OBSS Scanning Exemption Grant field is reserved when a 20/40 BSS Coexistence element is included in a group addressed frame.
Modifier and Type | Class and Description |
---|---|
static class |
Dot112040BssCoexistenceElement.Builder |
Modifier and Type | Method and Description |
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boolean |
equals(Object obj) |
boolean |
getBit5() |
boolean |
getBit6() |
boolean |
getBit7() |
Dot112040BssCoexistenceElement.Builder |
getBuilder() |
byte[] |
getRawData() |
int |
hashCode() |
boolean |
is20MhzBssWidthRequested() |
boolean |
is40MhzIntolerant() |
boolean |
isInformationRequested() |
boolean |
isObssScanningExemptionGranted() |
boolean |
isObssScanningExemptionRequested() |
int |
length() |
static Dot112040BssCoexistenceElement |
newInstance(byte[] rawData,
int offset,
int length)
A static factory method.
|
String |
toString() |
String |
toString(String indent) |
getElementId, getLength, getLengthAsInt
public static Dot112040BssCoexistenceElement newInstance(byte[] rawData, int offset, int length) throws IllegalRawDataException
ByteArrays.validateBounds(byte[], int, int)
,
which may throw exceptions undocumented here.rawData
- rawDataoffset
- offsetlength
- lengthIllegalRawDataException
- if parsing the raw data fails.public boolean isInformationRequested()
public boolean is40MhzIntolerant()
public boolean is20MhzBssWidthRequested()
public boolean isObssScanningExemptionRequested()
public boolean isObssScanningExemptionGranted()
public boolean getBit5()
public boolean getBit6()
public boolean getBit7()
public int length()
length
in class Dot11InformationElement
public byte[] getRawData()
getRawData
in class Dot11InformationElement
public Dot112040BssCoexistenceElement.Builder getBuilder()
public int hashCode()
hashCode
in class Dot11InformationElement
public boolean equals(Object obj)
equals
in class Dot11InformationElement
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