User Manual 1 Apr.5, 2010

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Users Manual

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Contents

1 Introduction...................................................................................................... 6
1.1 Purpose.......................................................................................................................... 6
1.2 Scope............................................................................................................................. 6
1.3 Conventions .................................................................................................................. 6
1.4 References..................................................................................................................... 7
1.5 Technical assistance ...................................................................................................... 7
1.6 Acronyms ...................................................................................................................... 7

2 Requirements and Setup ................................................................................ 8
2.1 Requirements ................................................................................................................ 8
2.2 AP and client setup ..................................................................................................... 10
2.2.1 Qualcomm AP setup ........................................................................................ 10
2.2.2 Client (slave) setup .......................................................................................... 11
2.3 DFS test setup configuration....................................................................................... 11
2.3.1 View the DFS configuration ............................................................................ 13
2.3.2 Data Density configuration .............................................................................. 13
2.3.3 Frequency/channel selection ............................................................................ 13
2.3.4 Channel bonding configuration (40 MHz mode) ............................................. 15
2.3.5 Radar probability test mode configuration ...................................................... 15
2.3.6 Choosing persistency of the radar channel information .................................. 15
2.3.7 Deleting the history file ................................................................................... 16
2.4 Configuring the AP for DFS tests - Examples ............................................................ 16
2.4.1 Radar probability test....................................................................................... 16
2.4.2 Channel move time test ................................................................................... 16
2.4.3 Channel availability test .................................................................................. 17
2.5 Avoiding false detection ............................................................................................. 17
2.6 Summary DFS related commands .............................................................................. 17

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Contents

Figures
Figure 2-1 Basic DFS test setup diagram for WCN1320 PCIe-based AP ................................................... 9
Figure 2-2 Basic DFS test setup diagram for WCN1320 Ethernet-based AP ............................................ 10
Figure 2-3 Client setup............................................................................................................................... 11

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Contents

Tables
Table 1-1 Reference documents and standards ............................................................................................ 7
Table 2-1 40 MHz channel pairs ................................................................................................................. 13
Table 2-3 DFS command summary ............................................................................................................ 17

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Revision history
Revision Date Description
A Sep 2009 Initial release
B Dec 2009 Updated for readability
C Feb 2010 Update for dual (AP/client) boot

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1 1 Introduction

2 1.1 Purpose
3 The purpose of this document is to provide information to engineers engaged in DFS testing of
4 QUALCOMM WCN1320-based reference designs and software. This document provides
5 information relating to installation, upgrade, and configuration.

6 1.2 Scope
7 This document is intended for those who are responsible for installing and testing the
8 QUALCOMM® WCN1320 AP reference design for DFS regulatory requirements. Therefore,
9 not all available commands are documented herein.

10 1.3 Conventions
11 Function declarations, function names, type declarations, and code samples appear in a different
12 font, e.g., #include.
13 Code variables appear in angle brackets, e.g., <number>.
14 Commands and command variables appear in a different font, e.g., copy a:*.* b:.
15 Parameter types are indicated by arrows:
→ Designates an input parameter
← Designates an output parameter
↔ Designates a parameter used for both input and output
16

17 Shading indicates content that has been added or changed in this revision of the document.
18

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Introduction

1 1.4 References
2 Reference documents, which may include QUALCOMM®, standards, and resource documents,
3 are listed in Table 1-1. Reference documents that are no longer applicable are deleted from this
4 table; therefore, reference numbers may not be sequential.

5 Table 1-1 Reference documents and standards

Ref. Document

Qualcomm
Q1 Application Note: Software Glossary for Customers CL93-V3077-1
6

7 1.5 Technical assistance
8 For assistance or clarification on information in this guide, submit a case to Qualcomm CDMA
9 Technologies at https://support.cdmatech.com/.
10 If you do not have access to the CDMATech Support Service website, register for access or send
11 email to support.cdmatech@qualcomm.com.

12 1.6 Acronyms
13 For definitions of terms and abbreviations, refer to [Q1].
14

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1 2 Requirements and Setup

2 This chapter enumerates the hardware and software requirements for DFS testing the setup for
3 same.

4 2.1 Requirements
5 1. LP1: Laptop with a USB 2.0 slot (IBM T43) – Acts as a client device with an installed USB
6 802.11n wireless adapter. FCC specified Video codec and player must be installed on this
7 laptop. If a third party client card is used, make sure that 11h is enabled on the device.
8 2. LP2: Laptop with Ethernet port and USB slot (HP Compaq 6710b) – Ethernet connected to the
9 AP (Master) for streaming the video; serially connect to the AP via a USB to serial adapter
10 for console printing. FCC specified video file must be saved on the hard drive of this laptop.
11 This PC is an agent for the WCN1320-based AP.
12 3. WCD: Wireless adapter to use on the client side (Linksys WUSB600N).
13 4. AP: Access Point (DUT) or Master device. Qualcomm WCN1320-based 65-VN780-P2 PCIe
14 AP / Qualcomm WCN1320-based 65-VN663-P2 Ethernet AP with DFS software.
15

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$Requirements and Setup 1 a) Confirm the connections of all the devices as shown in the figures above. 2 b) Confirm that unique static IP addresses have been assigned for LP2 (192.168.1.102). 3 c) Insure that the IP address is set for the slave device is 192.168.1.100 on LP1 and not 4 for any other network devices on the laptop. 5 d) Launch Tera Term Pro on LP2 and confirm messages appear when the AP is 6 powered on. 7 e) Confirm the TeraTerm serial port configuration on LP2 for the Master device: 8 Port: COM2 9 Baud Rate: 115200 for PCIe-based AP (DUT) 10 38400 for Ethernet-base AP (DUT) 11 Data: 8bit 12 Parity: None 13 Stop: 1bit 14 Flow Control: None 15 2. To access the video file on LP2 from LP1: 16 a) On LP1, go to Start>Run> 17 b) In the Run box type \\192.168.1.102\DFS 18 c) When prompted for the user name and password, enter: 19 SCLWLSW for the user name and Airgonet1 for the password. 20 NOTE: The video file in the DFS folder on LP2 is TestFile.mpg. 21 3. Enabling the video file 22 a) Start running the video file from LP1 by simply double clicking the video file or we 23 may choose the “open with” option to select the required media player. 24 b) Video should now be streaming from LP2 to LP1 over the air. 25 c) Restart the video whenever needed and each time the AP is rebooted. The video will 26 be stopped automatically when the AP is rebooted. 27 NOTE: The aniSdkTool –s cga command must be issued after any aniSdkTool –s command to 28 have the aniSdkTool –s command take effect. 29 As each test is completed, it is recommended to reboot the AP with the default settings before 30 beginning the next test by issuing the following command: 31 Reboot 32 NOTE: Before issuing any command on the console, prints on the console shall be disabled. 33 NOTE: On Ethernet AP prints can be disabled by issuing the dmesg –n 1 command and can be enabled 34 by dmesg –n7 command. 80-VT830-1 C 12 Qualcomm Confidential and Proprietary MAY CONTAIN U.S. AND INTERNATIONAL EXPORT CONTROLLED INFORMATION$

Requirements and Setup

1 NOTE: On PCIe AP, prints can be disabled by killing tail -f
2 /proc/net/drivers/wlan0/sirDump application. To enable prints for PCIe AP again, enter
3 /config/prints.

4 2.3.1 View the DFS configuration
5

6 To view the complete active DFS configuration on the AP, use the following command:
7 aniSdkTool -g dfs 0

8 2.3.2 Data Density configuration
9 Data density will need to be modified for the intended bandwidth mode. Data density is modified
10 by issuing the commands below on Tera Term Pro console of LP2. There are two separate
11 commands for data density modifications, one for 40MHz bandwidth mode and one for 20MHz
12 bandwidth mode:
13 Commands for setting data density at 27 Mbps (40MHz bandwidth mode):
14 dump 188 0
15 dump 181 2 82 82 82
16 Commands for setting data density at 26 Mbps (20MHz bandwidth mode):
17 dump 188 0
18 dump 180 2 66 66 66
19 Output: The data density will be increased and the increased data density can be observed on RF
20 spectrum analyzer which is capturing the traffic activities of Qualcomm Master Device.

21 2.3.3 Frequency/channel selection
22 By default, the Qualcomm Master device will boot up in 40MHz mode on primary channel 100
23 and secondary channel 104. The center frequency will be at 5510MHz.
24 For conducting the FCC radar tests, the DUT must be set on certain specific frequencies. The
25 IEEE 802.11n protocol does not allow operation on all the frequencies in 40MHz mode.
26 Only certain pairs of primary and secondary channels are allowed in 40MHz as shown in the table
27 below. For example when the primary channel is selected at 40, the secondary channel of 44
28 cannot be selected.
29

30 Table 2-1 40 MHz channel pairs

Primary Secondary
36 40
40 36
44 48
48 44
52 56

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Requirements and Setup

Primary Secondary
56 52
60 64
64 60
100 104
104 100
108 112
112 108
132 136
136 132
149 153
153 149
157 161
161 157
1

2 The DFS commands to set the frequency are as follows:
3 aniSdkTool -s dfs 0 2 {prim}
4 aniSdkTool -s dfs 0 8 1 (force the AP to select the configured channel)
5 aniSdkTool -s cga (configure the AP to the selected channel)
6 Specify the primary {prim} channel and the secondary will be selected automatically based on
7 the combinations shown in the table above.

8 2.3.3.1 Channel to frequency/frequency to channel conversion
9 The command aniSdkTool -g rad shows the radio status of AP. If 40MHz bandwidth mode is
10 enabled, this command will show both primary and secondary channels and if 20MHz bandwidth
11 mode is enabled, it will show only the primary channel as there is no secondary channel in this
12 mode.
13 Frequency to channel: frequency: (frequency-5000)/5
14 Example: (5180-5000)/5 = channel 36 and (5600-5000)/5 = channel 120
15 Channel to frequency: ((channel*5)+5000)
16 Example: ((36*5)+5000) = frequency 5180 and ((48*5)+5000) = frequency 5240
17 If primary is 44 and secondary is 48, the central frequency would be at channel 46 in 40MHz
18 mode (channel bonding enabled). If in 20MHz mode, the operating frequency would be at
19 channel 44 (primary channel).

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Requirements and Setup

1 2.3.4 Channel bonding configuration (40 MHz mode)
2 The commands to enable channel bonding are as follows:
3 aniSdkTool -s bond 0 1
4 aniSdkTool -s cga
5 The commands to disable channel bonding (i.e. set to 20 MHz mode) are as follows:
6 aniSdkTool -s bond 0 0
7 aniSdkTool -s cga

8 2.3.5 Radar probability test mode configuration
9

10 To enable the AP for probability test mode, the following command is used:
11 dump 19 1
12 To disable probability test mode and allow the AP to switch channels upon radar detection, the
13 following command is used:
14 dump 19 0
15 In radar probability test mode, the AP will not switch the channel upon detecting radar; instead
16 the AP remains on the same channel and prints a message on the console upon detecting radar
17 pulses. This allows the tester to continuously issue radar pulses without reconfiguring the AP
18 with the target frequency multiple times.
19 When in test mode, the output on the console of LP2 will be similar to the following:
20

21 halIsFalseRadarTrigger: 402: AGC_RDET_RADAR_DETECTED_REG : 7
22 ********** Detected a genuine radar, radarPW=110, NumPulse=4 ************
23 halRadar_ProcessDetectInd: 513: Radar interrupt testing in progress...
24

25 2.3.5.1 Radar parking control (Channel Availability Check Control)
26

27 To avoid the channel availability check (i.e. disable radar parking), use the following commands:
28 aniSdkTool -s dfs 0 9 0
29 aniSdkTool -s cga
30 To enable radar parking, use the following commands:
31 aniSdkTool -s dfs 0 9 1
32 aniSdkTool -s cga
33 When DFS selects a radar channel, it parks on that channel for 60 seconds before starting the AP
34 to insure that the channel is radar free. Sometimes this delay might be a nuisance when
35 performing DFS testing.

36 2.3.6 Choosing persistency of the radar channel information
37 Disable persisting radar channel, use the following commands:
38 aniSdkTool -s dfs 0 7 0

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Requirements and Setup

1 aniSdkTool -s cga
2 Enable persisting radar channel, use the following commands:
3 aniSdkTool -s dfs 0 7 1
4 aniSdkTool -s cga
5 During normal operation of the AP with DFS turned on, when radar is detected on the current
6 operating channel, DFS is triggered to select another channel to avoid interfering with the radar
7 signals. When selecting another channel DFS will record or persist the channel on which radar
8 was detected and will not allow the AP to operate in this radar affected channel for another 30
9 minutes per FCC requirements.
10 During DFS testing it might be required to utilize the same radar affected channel in spite
11 detected radar.
12

13 2.3.7 Deleting the history file
14 To decrease testing time, the radar detection history file can be deleted on the Qualcomm Master
15 device so that channels where radar was detected previously, may be reused.
16 To delete the radar history file on the Qualcomm Master (DUT), use the following commands:
17 rm /config/wsmSavedRadarDetectList
18 aniSdkTool -s cga

19 2.4 Configuring the AP for DFS tests - Examples
20 This section describes the steps required to configure the AP for each of the FCC DFS tests.

21 2.4.1 Radar probability test
22 Commands to configure the radar probability test in channel 120 (20MHz):
23 aniSdkTool -s bond 0 0
24 aniSdkTool -s dfs 0 2 120
25 aniSdkTool -s dfs 0 8 1
26 aniSdkTool -s cga
27 After the AP is fully booted with the new settings, issue the following command to put AP into
28 probability test mode:
29 dump 19 1

30 2.4.2 Channel move time test
31 Commands to configure the AP for testing channel move time:
32 aniSdkTool -s dfs 0 2 120
33 aniSdkTool -s dfs 0 8 1
34 aniSdkTool -s cga
35 After AP is fully booted with new settings, issue the following command to insure that the AP is
36 not in probability test mode.
37 dump 19 0

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Requirements and Setup

1 2.4.3 Channel availability test
2 Commands to configure the channel availability test on channel 120:
3 aniSdkTool -s dfs 0 2 120
4 aniSdkTool -s dfs 0 8 1
5 aniSdkTool -s cga

6 2.5 Avoiding false detection
7 When configuring the AP to start on a potential radar channel, there is a slight probability of false
8 detection caused due to the highly sensitive antenna either during channel availability check or
9 after AP is up. False detection can result in a channel switch to another channel and hence
10 slowing down the test process. To avoid the channel switch due to false detection, it is always
11 better to put the AP into probability test mode whenever not testing channel move time or some
12 other test where a channel switch is not required.
13 To do this, issue the command dump 19 1 right after rebooting the AP.

14 2.6 Summary DFS related commands
15 The table below is a summary of DFS related commands.

16 Table 2-2 DFS command summary
# Summary Commands Details Default
Value
1. Setting preferred aniSdkTool -s Preferred 2.4 GHz channels 6, 2
2.4 GHz channels dfs 0 1 {prim} to be selected by DFS
{secd} algorithm. Channel spacing
should be 4 between primary
and secondary.
2. Setting preferred aniSdkTool -s Preferred 5 GHz channels to 36, 40
5 GHz channels dfs 0 2 {prim} be selected by DFS
algorithm. Secondary
channel would be selected
automatically.
3. Setting preferred aniSdkTool -s UNII bands from which DFS Low and
UNII bands dfs 0 3 {low can select channels. 1 – High
1/0} {mid 1/0} Enabled, 0 –Disable, at least
{high 1/0} one band should be enabled.
4. Setting preferred aniSdkTool -s Preferred band of operation 5 GHz
band dfs 0 4 {5GHz} for DFS when the AP is
configured to operate in any
band. 1 – 5GHz, 0 – DFS
selected.
5. Setting weight aniSdkTool -s Minimum percentage 20%
margin dfs 0 5 difference in weight between
{percentage} weight of the current
operating channel and the
weight of the DFS selected
channel.

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Requirements and Setup

# Summary Commands Details Default
Value
6. Setting CB aniSdkTool -s Maximum threshold weight 6000000
threshold dfs 0 6 above which DFS will turn off
{Threshold} the channel bonding.

7. Enable/Disable aniSdkTool -s Enable or disable persisting Enabled
Persisting radar dfs 0 7 {1/0} the radar channel into flash.
channel into flash
8. Enable/Disable aniSdkTool -s Enable or disable forcing Disabled
force channel dfs 0 8 {1/0} DFS to pick a preferred
select channel, provided no radar
history is present in those
channels.
9. Enable/Disable aniSdkTool -s Enable or disable parking Enabled
radar parking dfs 0 9 {1/0} “channel availability check”
for 60 seconds when radar
channel is selected.
10. Setting potential aniSdkTool -s Setting a minimum weight to 10
radar channel dfs 0 10 be assigned to potential
weight {weight} radar channels giving more
priority to non-potential radar
channels.
11. Show DFS aniSdkTool -g Get all the DFS parameters. -
parameters dfs 0

1

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Document Created: 2010-02-24 14:41:10
Document Modified: 2010-02-24 14:41:10