WLAN radio resource measurement measures channel qualities and radio performance. It enables client and APs to learn the wireless environment and use wireless resources such as spectrum, power, and bandwidth more effectively.

WLAN radio resource measurement includes 802.11h measurement and 802.11k measurement.

802.11h measurement

802.11h measurement measures channels in the 5 GHz band. Table 1 lists the measurement types it supports.

Table 1 802.11h measurement

Type		Description
Spectrum management measurement	Basic	Measures whether a client has detected any of the following: · Packets from other BSSs. · OFDM preambles. · Radar signals. · Unknown signals.
	Clear Channel Assessment (CCA)	Measures the percentage of busy time for a channel to the total measurement period.
	Receive Power Indication (RPI)	Measures the percentage of time for different RPI ranges to the total measurement period.
Transmit Power Control (TPC) measurement		Measures the link redundancy and transmission power for clients.

802.11h measurement operates in the following procedure:

1. An AP sets the Spectrum Mgmt field to 1 in beacons, probe responses, association responses, or reassociation responses to notify the clients that they can send 802.11h measurement requests.

2. Upon receiving a measurement request from a client, the AP performs the required measurement and sends a report to the client.

The AP can also send measurement requests periodically to clients and collect measurement reports from clients.

802.11k measurement

802.11k measurement measures channels in both the 2.4 GHz and 5 GHz bands. Table 2 lists the measurement types it supports.

Table 2 802.11k measurement

Type		Description
Radio measurement	Beacon	Measures the Received Channel Power Indicator (RCPI) and Received Signal to Noise Indicator (RSNI) of beacons, measurement pilot packets, and probe responses.
	Frame	Measures the number of frames transmitted and the average RCPI for these frames.
	Station statistics	Measures the received and transmitted fragment counts, received and transmitted multicast frame counts, failed counts, retry counts, ACK failure counts.
	Transmit stream	Measures the frame of a specific transmit stream.
	Channel load	Measures the channel usage.
	Location	Measures the relative locations of a requester and the requested.
	Noise histogram	Measures the distribution of noise in different decibel ranges.
Link measurement		Measures RCPI, RSNI, and link redundancy for a requested link.
Neighbor measurement		Measures the channel and BSSID of neighbor APs.

802.11k measurement operates in the following procedure:

1. An AP sets the Radio Measurement field to 1 in beacons, probe responses, association responses, or reassociation responses to notify the clients that they can send 802.11k measurement requests.

These frames also carry measurement capabilities of the AP to inform clients of measurement types that the AP supports.

The AP periodically sends Measurement Pilot frames to help clients fast discover the AP. Measurement Pilot frames are sent more frequently than beacons and carry less information.

2. Upon receiving a measurement request from a client, the AP performs the required measurement and sends a report to the client.

The AP can also send measurement requests periodically to clients and collect measurement reports from clients.

Configuration task list

Tasks at a glance
(Required.) Enabling radio resource measurement
(Optional.) Setting the measurement duration and interval
(Optional.) Setting the match mode for client radio resource measurement capabilities

Enabling radio resource measurement

Enabling radio resource measurement in radio view

Step	Command	Remarks
1. Enter system view.	system-view	N/A
2. Enter AP view.	wlan ap ap-name [ model model-name ]	N/A
3. Enter radio view.	radio radio-id	N/A
4. Enable radio resource measurement.	resource-measure enable	By default, the configuration in AP group view is used. You must enable radio resource measurement if you enable link, neighbor, or radio measurement.
5. Enable spectrum management.	spectrum-management enable	By default, the configuration in AP group view is used. Spectrum or TPC measurement takes effect only after you enable spectrum management. For more information about this command, see WLAN Command Reference.
6. Enable a measurement type.	measure { all \| link \| neighbor \| radio \| spectrum \| tpc } { enable \| disable }	By default, the configuration in AP group view is used. The spectrum and tpc keywords are available only on 5GHz radios.

Enabling radio resource measurement in AP group radio view

Step	Command	Remarks
1. Enter system view.	system-view	N/A
2. Enter AP group view.	wlan ap-group group-name	N/A
3. Enter AP model view.	ap-model ap-model	N/A
4. Enter AP group radio view.	radio radio-id	N/A
5. Enable radio resource measurement.	resource-measure enable	By default, radio resource measurement is disabled. You must enable radio resource measurement if you enable link, neighbor, or radio measurement.
6. Enable spectrum management.	spectrum-management enable	By default, spectrum management is disabled. Spectrum or TPC measurement takes effect only after you enable spectrum management. For more information about this command, see WLAN Command Reference.
7. Enable a measurement type.	measure { all \| link \| neighbor \| radio \| spectrum \| tpc } { enable \| disable }	By default, measurement is disabled. The spectrum and tpc keywords are available only on 5GHz radios.

Setting the measurement duration and interval

When radio resource measurement is enabled for an AP, the AP sends measurement requests that carry the measurement duration to clients at the specified interval.

Setting the measurement duration and interval in radio view

Step	Command	Remarks
1. Enter system view.	system-view	N/A
2. Enter AP view.	wlan ap ap-name [ model model-name ]	N/A
3. Enter radio view.	radio radio-id	N/A
4. Set the measurement duration.	measure-duration time	By default, the configuration in AP group view is used.
5. Set the measurement interval.	measure-interval value	By default, the configuration in AP group view is used.

Setting the measurement duration and interval in AP group radio view

Step	Command	Remarks
1. Enter system view.	system-view	N/A
2. Enter AP group view.	wlan ap-group group-name	N/A
3. Enter AP model view.	ap-model ap-model	N/A
4. Enter AP group radio view.	radio radio-id	N/A
5. Set the measurement duration.	measure-duration time	By default, the measurement duration is 500 TUs.
6. Set the measurement interval.	measure-interval value	By default, the measurement interval is 30 seconds.

Setting the match mode for client radio resource measurement capabilities

This feature allows a client to associate with an AP based on the predefined match criteria. Radio resource measurement capability refers to the radio resource measurement types supported by the AP and client. The device supports the following match modes for client radio resource measurement capabilities:

· All—A client is allowed to associate with an AP only when all its radio resource measurement capabilities match the AP's radio resource measurement capabilities.

· None—Client radio resource measurement capabilities are not checked.

· Partial—A client is allowed to associate with an AP as long as one of its radio resource measurement capabilities matches any of the AP's radio resource measurement capabilities.

Setting the match mode for client radio resource measurement capabilities in radio view

Step	Command	Remarks
1. Enter system view.	system-view	N/A
2. Enter AP view.	wlan ap ap-name [ model model-name ]	N/A
3. Enter radio view.	radio radio-id	N/A
4. Set the match mode for client radio resource measurement capabilities.	rm-capability mode { all \| none \| partial }	By default, the configuration in AP group view is used.

Setting the match mode for client radio resource measurement capabilities in AP group radio view

Step	Command	Remarks
1. Enter system view.	system-view	N/A
2. Enter AP group view.	wlan ap-group group-name	N/A
3. Enter AP model view.	ap-model ap-model	N/A
4. Enter AP group radio view.	radio radio-id	N/A
5. Set the match mode for client radio resource measurement capabilities.	rm-capability mode { all \| none \| partial }	By default, an AP does not check the radio resource measurement capabilities of a client.

Displaying and maintaining WLAN radio resource measurement

Execute display commands in any view.

Task	Command
Display client measurement reports.	display wlan measure-report ap ap-name radio radio-id [ client mac-address mac-address ]

Radio resource measurement configuration examples

Network requirements

As shown in Figure 1, configure radio resource measurement to meet the following requirements:

· The client can come online only when all its radio resource measurement capabilities match the AP's.

· The client can perform all types of measurements.

Figure 1 Network diagram

Configuration procedures

# Create service template 1.

<AC> system-view

[AC] wlan service-template 1

# Set the SSID to resource-measure, and enable service template 1.

[AC-wlan-st-1] ssid resource-measure

[AC-wlan-st-1] service-template enable

[AC-wlan-st-1] quit

# Create the manual AP ap1, and specify the AP model and serial ID.

[AC] wlan ap ap1 model WA4320i-ACN

[AC-wlan-ap-ap1] serial-id 219801A0CNC138011454

# Enter radio view of radio 1.

[AC-wlan-ap-ap1] radio 1

# Enable spectrum management.

[AC-wlan-ap-ap1-radio-1] spectrum-management enable

# Enable radio resource measurement.

[AC-wlan-ap-ap1-radio-1] resource-measure enable

# Enable all measurement features.

[AC-wlan-ap-ap1-radio-1] measure all enable

# Set the match mode for client radio resource measurement capabilities to All.

[AC-wlan-ap-ap1-radio-1] rm-capability mode all

# Bind the service template to radio 1, and enable the radio.

[AC-wlan-ap-ap1-radio-1] service-template 1

[AC-wlan-ap-ap1-radio-1] radio enable

[AC-wlan-ap-ap1-radio-1] quit

[AC-wlan-ap-ap1] quit

Verifying the configuration

# Verify that the client has come online.

[AC] display wlan client

Total number of clients: 1

MAC address Username AP name RID IP address VLAN ID

00ee-bd44-557f N/A ap1 1 1.1.1.1 1

# Display measurement reports from the client.

[AC] display wlan measure-report ap ap1 radio 1

Total number of clients: 1

Client MAC address : 00ee-bd44-557f

Link measurement:

Link margin : 2 dBm

RCPI : -85 dBm

RSNI : 53 dBm

Noise histogram:

Antenna ID : 3

ANPI : -56 dBm

IPI0 to IPI10 density : 5 12 16 13 8 5 5 15 17 1 3

Spectrum measurement:

Transmit power : 20 dBm

BSS : Detected

OFDM preamble : Detected

Radar : Detected

Unidentified signal : Undetected

CCA busy fraction : 60

RPI0 to RPI7 density : 3 7 11 19 15 23 15 7

Frame report entry:

BSSID : a072-2351-e253

PHY type : fhss

Average RCPI : -10 dBm

Last RSNI : 2 dBm

Last RCPI : -20 dBm

Frames : 1

Dot11BSSAverageAccessDelay group:

Average access delay : 32 ms

BestEffort average access delay : 1 ms

Background average access delay : 1 ms

Video average access delay : 1 ms

Voice average access delay : 1 ms

Clients : 32

Channel utilization rate : 11

Transmit stream:

Traffic ID : 0

Sent MSDUs : 60

Discarded MSDUs : 5

Failed MSDUs : 3

MSDUs resent multiple times : 3

Lost QoS CF-Polls : 2

Average queue delay : 2 ms

Average transmit delay : 1 ms

Bin0 range : 0 to 10 ms

Bin0 to Bin5 : 5 10 10 5 10 10

02-WLAN

Setting the measurement duration and interval

Displaying and maintaining WLAN radio resource measurement

Verifying the configuration

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