fwa wmm edca-client

Function

The fwa wmm edca-client command configures EDCA parameters used by the remote AP to negotiate with the AT.

The undo fwa wmm edca-client command restores the default EDCA parameters used by the remote AP to negotiate with the AT.

Table 1 lists the default EDCA parameter settings.

**Table 1** Default EDCA parameter settings
Packet Type	Parameters	Description
AC_VO	ECWmax	3
	ECWmin	2
	AIFSN	2
	TXOPLimit	47
AC_VI	ECWmax	4
	ECWmin	3
	AIFSN	2
	TXOPLimit	94
AC_BE	ECWmax	10
	ECWmin	4
	AIFSN	3
	TXOPLimit	0
AC_BK	ECWmax	10
	ECWmin	4
	AIFSN	7
	TXOPLimit	0

Format

fwa wmm edca-client { ac-vo | ac-vi | ac-be | ac-bk } { aifsn aifsn-value | ecw ecwmin ecwmin-value ecwmax ecwmax-value | txoplimit txoplimit-value } ^*

undo fwa wmm edca-client

Parameters

Parameter	Description	Value
ac-vo	Indicates AC_VO packets.	-
ac-vi	Indicates AC_VI packets.	-
ac-be	Indicates AC_BE packets.	-
ac-bk	Indicates AC_BK packets.	-
aifsn aifsn-value	Specifies the arbitration inter frame spacing number (AIFSN), which determines the channel idle time.	The value is an integer that ranges from 1 to 15.
ecwmin ecwmin-value	Specifies the exponent form of the minimum contention window. ecwmin-value and ecwmax-value determine the average backoff time.	The value is an integer that ranges from 0 to 15 and must be smaller than the ecwmax-value value.
ecwmax ecwmax-value	Specifies the exponent form of the maximum contention window. ecwmin-value and ecwmax-value determine the average backoff time.	The value is an integer that ranges from 0 to 15 and must be greater than the ecwmin-value value.
txoplimit txoplimit-value	Specifies the transmission opportunity limit (TXOPLimit), which determines the maximum duration in which a STA can occupy a channel. A larger TXOPLimit value indicates a longer duration to occupy a channel.	The value is an integer that ranges from 0 to 255. The unit is 32 microseconds. NOTE: If the TXOPLimit value is 0, the STA can send only one data frame every time it occupies a channel.

Views

Mesh profile view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

WMM classifies data packets into the following access categories (ACs): AC_VO, AC_VI, AC_BE, and AC_BK. A set of EDCA parameters is set for each AC queue. These parameters determine the capabilities of a queue to occupy a channel. You can set EDCA parameters for packets of different ACs to provide differentiated priorities to the packets and different capabilities to compete for channels. In this way, differentiated services are implemented.

Table 2 describes the EDCA parameters.

**Table 2** EDCA parameter description
Parameter	Meaning
Arbitration Interframe Spacing Number (AIFSN)	The DIFS has a fixed value. WMM provides different DIFS values for different ACs. A large AIFSN value means that the STA must wait for a long time and has a low priority.
Exponent form of CWmin (ECWmin) and exponent form of CWmax (ECWmax)	ECWmin specifies the minimum backoff time, and ECWmax specifies the maximum backoff time. Together, they determine the average backoff time. Large ECWmin and ECWmax values mean a long average backoff time for the STA and a low STA priority.
Transmission Opportunity Limit (TXOPLimit)	After preempting a channel, the STA can occupy the channel within the period of TXOPLimit. A large TXOPLimit value means that the STA can occupy the channel for a long time. If the TXOPLimit value is 0, the STA can only send one data frame every time it preempts a channel.

Precautions

The EDCA parameters configured using the fwa wmm edca-client command take effect only after you set the EDCA mode to manual mode using the fwa wmm edca-mode manual command.
By default, queues of AC_VO, AC_VI, AC_BE, and AC_BK are in descending order of priority. Priorities of the four queues are determined by their EDCA parameters.

You need to configure EDCA parameters according to actual scenarios. Table 3 shows the configuration of EDCA parameters in voice scenarios, and Table 4 shows the configuration in voice and video hybrid scenarios.

**Table 3** Recommended configuration of EDCA parameters in voice scenarios
Packet Type	Parameters	Description
AC_VO	ECWmax	4
	ECWmin	2
	AIFSN	2
	TXOPLimit	0
AC_VI	ECWmax	5
	ECWmin	3
	AIFSN	5
	TXOPLimit	0
AC_BE	ECWmax	10
	ECWmin	6
	AIFSN	5
	TXOPLimit	0
AC_BK	ECWmax	10
	ECWmin	8
	AIFSN	12
	TXOPLimit	0

**Table 4** Recommended configuration of EDCA parameters in voice and video hybrid scenarios
Packet Type	Parameters	Description
AC_VO	ECWmax	4
	ECWmin	2
	AIFSN	2
	TXOPLimit	0
AC_VI	ECWmax	5
	ECWmin	3
	AIFSN	5
	TXOPLimit	0
AC_BE	ECWmax	10
	ECWmin	6
	AIFSN	12
	TXOPLimit	0
AC_BK	ECWmax	10
	ECWmin	8
	AIFSN	12
	TXOPLimit	0

Example

# Configure EDCA parameters of AC_VO packets used by the remote AP to negotiate with the AT.

<HUAWEI> system-view
[HUAWEI] wlan
[HUAWEI-wlan-view] mesh-profile name test
[HUAWEI-wlan-mesh-prof-test] fwa wmm edca-mode manual
[HUAWEI-wlan-mesh-prof-test] fwa wmm edca-client ac-vo aifsn 7 ecw ecwmin 4 ecwmax 10 txoplimit 0