draft-ietf-opsawg-capwap-extension-03.txt   draft-ietf-opsawg-capwap-extension-04.txt 
OPSAWG Y. Chen OPSAWG Y. Chen
Internet-Draft D. Liu Internet-Draft D. Liu
Updates: 5416 (if approved) H. Deng Updates: 5416 (if approved) H. Deng
Intended status: Standards Track China Mobile Intended status: Standards Track China Mobile
Expires: September 5, 2014 Lei. Zhu Expires: Nov 10, 2014 Lei. Zhu
Huawei Huawei
March 4, 2014 May 10, 2014
CAPWAP Extension for 802.11n and Power/channel Autoconfiguration CAPWAP Extension for 802.11n and Power/channel Autoconfiguration
draft-ietf-opsawg-capwap-extension-03 draft-ietf-opsawg-capwap-extension-04
Abstract Abstract
The CAPWAP binding for 802.11 is specified by RFC5416 and it was The CAPWAP binding for 802.11 is specified by RFC5416 and it was
based on IEEE 802-11.2007 standard. Several new amendments of 802.11 based on IEEE 802-11.2007 standard. Several new amendments of 802.11
have been published since RFC5416 was published in 2009. 802.11n is have been published since RFC5416 was published in 2009. 802.11n is
one of those amendments and it has been widely used in real one of those amendments and it has been widely used in real
deployment. This document extends the CAPWAP binding for 802.11 to deployment. This document extends the CAPWAP binding for 802.11 to
support 802.11n and also defines a power and channel auto support 802.11n and also defines a power and channel auto
configuration extension. configuration extension.
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
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Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on September 5, 2014. This Internet-Draft will expire on September 20, 2014.
Copyright Notice Copyright Notice
Copyright (c) 2014 IETF Trust and the persons identified as the Copyright (c) 2014 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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3.1.2. 802.11n Radio Configuration Message Element . . . . . 4 3.1.2. 802.11n Radio Configuration Message Element . . . . . 4
3.1.3. 802.11n Station Information . . . . . . . . . . . . . 6 3.1.3. 802.11n Station Information . . . . . . . . . . . . . 6
4. Power and Channel Autoconfiguration . . . . . . . . . . . . . 7 4. Power and Channel Autoconfiguration . . . . . . . . . . . . . 7
4.1. Channel Autoconfiguration When WTP Power On . . . . . . . 7 4.1. Channel Autoconfiguration When WTP Power On . . . . . . . 7
4.2. Power Configuration When WTP Power On . . . . . . . . . . 8 4.2. Power Configuration When WTP Power On . . . . . . . . . . 8
4.3. Channel/Power Auto Adjusment . . . . . . . . . . . . . . 8 4.3. Channel/Power Auto Adjusment . . . . . . . . . . . . . . 8
4.3.1. IEEE 802.11 Scan Parameters Message Element . . . . . 9 4.3.1. IEEE 802.11 Scan Parameters Message Element . . . . . 9
4.3.2. IEEE 802.11 Channel Bind Message Element . . . . . . 11 4.3.2. IEEE 802.11 Channel Bind Message Element . . . . . . 11
4.3.3. IEEE 802.11 Channel Scan Report . . . . . . . . . . . 12 4.3.3. IEEE 802.11 Channel Scan Report . . . . . . . . . . . 12
4.3.4. IEEE 802.11 Neighbor WTP Report . . . . . . . . . . . 14 4.3.4. IEEE 802.11 Neighbor WTP Report . . . . . . . . . . . 14
5. Security Considerations . . . . . . . . . . . . . . . . . . . 14 5. Security Considerations . . . . . . . . . . . . . . . . . . . 15
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 14 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 15
7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 15 7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 15
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 15 8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 16
9. Normative References . . . . . . . . . . . . . . . . . . . . 15 9. Normative References . . . . . . . . . . . . . . . . . . . . 16
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 16 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 17
1. Introduction 1. Introduction
The 802.11-2009 [IEEE 802.11n.2009] standard was published in 2009 as The 802.11-2009 [IEEE 802.11n.2009] standard was published in 2009 as
an amendment to the IEEE 802.11-2007 standard to improve network an amendment to the IEEE 802.11-2007 standard to improve network
throughput. The maximum data rate increases to 600Mbps. In the throughput. The maximum data rate increases to 600Mbps. In the
physical layer, 802.11n uses Orthogonal Frequency Division physical layer, 802.11n uses Orthogonal Frequency Division
Multiplexing (OFDM) and Multiple Input/Multiple Output (MIMO) to Multiplexing (OFDM) and Multiple Input/Multiple Output (MIMO) to
achieve the high throughput. 802.11n uses multiple antennas to form achieve the high throughput. 802.11n uses multiple antennas to form
an antenna array which can be dynamically adjusted to improve the an antenna array which can be dynamically adjusted to improve the
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channel for the WTP. channel for the WTP.
4.2. Power Configuration When WTP Power On 4.2. Power Configuration When WTP Power On
The IEEE 802.11 Tx Power message element defined in section 6.18 of The IEEE 802.11 Tx Power message element defined in section 6.18 of
[RFC5416] is used by the AC to control the transmission power of the [RFC5416] is used by the AC to control the transmission power of the
WTP. The 802.11 Tx Power information element is carried in the WTP. The 802.11 Tx Power information element is carried in the
Configure Status Response message or in the Configure Update Request Configure Status Response message or in the Configure Update Request
message. message.
4.3. Channel/Power Auto Adjusment 4.3. Channel/Power Auto Adjustment
The Channel Scan Procedure is illustrated by the figure 4. The Channel Scan Procedure is illustrated by the figure 4.
WTP Configure Status Req AC WTP Configure Status Req AC
-------------------------------------------------------> ------------------------------------------------------->
Configure Status Res(Scan Parameter Message Element, Channel Bind Message Element) Configure Status Res(Scan Parameter Message Element, Channel Bind Message Element)
<------------------------------------------------------ <------------------------------------------------------
or or
WTP AC WTP AC
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information is carried in the IEEE 802.11 Channel Scan Report message information is carried in the IEEE 802.11 Channel Scan Report message
element (Section 5.3) and an instance of the IEEE 802.11 Information element (Section 5.3) and an instance of the IEEE 802.11 Information
Element message element carrying a copy of theIEEE 802.11 Neighbor Element message element carrying a copy of theIEEE 802.11 Neighbor
WTP Report information element (Section 5.4). WTP Report information element (Section 5.4).
4.3.1. IEEE 802.11 Scan Parameters Message Element 4.3.1. IEEE 802.11 Scan Parameters Message Element
The format of the IEEE 802.11 Scan Parameters Message Element is as The format of the IEEE 802.11 Scan Parameters Message Element is as
shown in Figure 5: shown in Figure 5:
0 1 2 3 0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Radio ID |M|S|L|D| | Report Time | | Radio ID |M|S|L|D| | Report Time |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| PrimeChlSrvTime | On Channel ScanTime | | PrimeChlSrvTime | On Channel ScanTime |
+-------------------------------+-------------------------------+ +-------------------------------+-------------------------------+
| Off Channel ScanTime | | Off Channel ScanTime |
+-------------------------------+ +-------------------------------+
Figure 5: IEEE 802.11 Scan Parameters Message Element Figure 5: IEEE 802.11 Scan Parameters Message Element
Type: TBD3 for IEEE 802.11 Scan Parameters Message Element. Type: TBD3 for IEEE 802.11 Scan Parameters Message Element.
Length: 10. Length: 10.
Radio ID: An 8-bit value representing the radio, whose value is Radio ID: An 8-bit value representing the radio, whose value is
between one (1) and 31. between one (1) and 31.
M bit: Work mode of the WTP. 0x00:normal mode. 0x01: monitor only M bit: Work mode of the WTP. 0:normal mode. 1: monitor only mode, no
mode, no service is provided in this mode. service is provided in this mode.
S bit: Scan Type: 0x00: active scan; 0x01: passive scan. S bit: Scan Type: 0: active scan; 1: passive scan.
L bit: L=1: Open Load Balance Scan. L=0: Disable Load Balance Scan. L bit: L=1: Open Load Balance Scan. L=0: Disable Load Balance Scan.
D bit: D=1: Open Rogue WTP detection scan. D=0: Disable Rouge WTP D bit: D=1: Open Rogue WTP detection scan. D=0: Disable Rouge WTP
detection scan. detection scan.
Report Time: Channel quality report time (unit: second). Report Time: Channel quality report time (unit: second).
PrimeChlSrvTime: Service time (unit: millisecond) on the working scan PrimeChlSrvTime: Service time (unit: millisecond) on the working scan
channel. This segment is invalid(set to 0) when WTP oper mode is set channel. This segment is invalid(set to 0) when WTP oper mode is set
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Off Channel ScanTime: The scan time (unit: millisecond) of the Off Channel ScanTime: The scan time (unit: millisecond) of the
working channel. When the WTP operating mode is set to 2, this working channel. When the WTP operating mode is set to 2, this
segment MUST be set to 0. The maximum value of this segment is 120, segment MUST be set to 0. The maximum value of this segment is 120,
the minimum value of this segment is 60, the default value is 60. the minimum value of this segment is 60, the default value is 60.
4.3.2. IEEE 802.11 Channel Bind Message Element 4.3.2. IEEE 802.11 Channel Bind Message Element
The format of the IEEE 802.11 Channel Bind Message Element is as The format of the IEEE 802.11 Channel Bind Message Element is as
follows: follows:
0 1 2 3 0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Flag | Max Cycles |Channel Count |ScanChannelSet.| | Flag | Max Cycles |Channel Count |ScanChannelSet.|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 6: IEEE 802.11 Channel Bind Message Element Figure 6: IEEE 802.11 Channel Bind Message Element
Type: TBD4 for IEEE 802.11 Channel Bind Message Element. Type: TBD4 for IEEE 802.11 Channel Bind Message Element.
Length: 4. Length: 4.
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Max Cycles: Number of times the scanning cycle is repeated for the Max Cycles: Number of times the scanning cycle is repeated for the
set of channels identified by this message element. 255 means set of channels identified by this message element. 255 means
continuous scan. continuous scan.
Channel Count: The number of channels will be scanned. Channel Count: The number of channels will be scanned.
Scan Channel Set: identifies the members of the set of channels to Scan Channel Set: identifies the members of the set of channels to
which this message element instance applies. The format for each which this message element instance applies. The format for each
channel is as follows: channel is as follows:
0 1 2 3 0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Channel ID | Flag | | Channel ID | Flag |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 7: Channel Information Format Figure 7: Channel Information Format
Channel ID: the channel ID of the channel which will be scanned. Channel ID: the channel ID of the channel which will be scanned.
Flag: Bitmap, reserved for future use. Flag: Bitmap, reserved for future use.
4.3.3. IEEE 802.11 Channel Scan Report 4.3.3. IEEE 802.11 Channel Scan Report
There are two types of scan report: Channel Scan Reprot and Neighbor There are two types of scan report: Channel Scan Report and Neighbor
STA Reprot. Channel Scan Report is used to channel autoconfiguration STA Report. Channel Scan Report is used to channel autoconfiguration
while Neighbor WTP Report is used to power autoconfiguration. The while Neighbor WTP Report is used to power autoconfiguration. The
WTP send the scan report to the AC through WTP Event Request message. WTP send the scan report to the AC through WTP Event Request message.
The information element that used to carry the scan report is Channel The information element that used to carry the scan report is Channel
Scan Report Message Element and Neighbor WTP Report Message Element. Scan Report Message Element and Neighbor WTP Report Message Element.
The format of the IEEE 802.11 Channel Scan Report message element is The format of the IEEE 802.11 Channel Scan Report message element is
in Figure 8. in Figure 8.
0 1 2 3 0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Radio ID | Report Count | Channel Scan Report | | Radio ID | Report Count | Channel Scan Report |
+---------------------------------------------------------------+ +---------------------------------------------------------------+
Figure 8: IEEE 802.11 Channel Scan Report Message Element Figure 8: IEEE 802.11 Channel Scan Report Message Element
Type: TBD5 for IEEE 802.11 Channel Scan Report message element. Type: TBD5 for IEEE 802.11 Channel Scan Report message element.
Length: >=29. Length: >=29.
Radio ID: An 8-bit value representing the radio, whose value is Radio ID: An 8-bit value representing the radio, whose value is
between one (1) and 31. between one (1) and 31.
Report Count: The number of channels for which a report is provided. Report Count: The number of channels for which a report is provided.
Channel Scan Report: The format of each Channel Scan Report is shown Channel Scan Report: The format of each Channel Scan Report is shown
in Figure 9. It complies with the IEEE 802.11 Beacon report that in Figure 9.
defined in section 8.4.2.24.7 of [IEEE-802.11.2012].
0 1 2 3 0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Operating Class|Channel Number |Actual Measurement Start Time..| | Channel Number | Radar Statistics | Mean |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ...Actual Measurement Start Time | | Time | Mean RSSI | Screen Packet Count |
|-------------------------------+-------------------------------+ +---------------------------------------------------------------+
|..Actual Measurement Start Time| Measurement Duration | | NeighborCount| Mean Noise | Interference | WTP Tx Occp |
+---------------+---------------+-------------------------------+ +---------------------------------------------------------------+
|Reported Frame | RCPI | BSSID... | | WTP Rx Occp | Unknown Occp | CRC Err Cnt | Decrypt Err Cnt |
+---------------+---------------+-------------------------------+ +---------------------------------------------------------------+
| ...BSSID | |Phy Err Cnt | Retrans Cnt |
+---------------+-----------------------------------------------+ +-----------------------------+
| Antenna ID | Parent TSF... |
+---------------+-----------------------------------------------+
|...Parent TSF | Optional Sub-elements(variable) |
+---------------+-----------------------------------------------+
Figure 9: Channel Scan Report Figure 9: Channel Scan Report
Operating Class: Indicates the channel set for which the measurement Channel Number: The channel number.
request applies. The definition of this field complies with the
definition in section 8.4.2.24.7 of [IEEE-802.11.2012].
Channel Number: Indicates the channel number for which the Radar Statistics: Whether detect radar signal in this channel. 0x00:
measurement report applies. The definition of this field complies detect radar signal. 0x01: no radar signal is detected.
with the definition in section 8.4.2.24.7 of [IEEE-802.11.2012].
Actual Measurement Start Time: Is set to the value of the measuring Mean Time: Channel measurement duration (ms).
station's TSF timer at the time the measurement started.
Measurement Duration: Is set to the duration over which the Beacon Mean RSSI: The average signal strength of the scanned channel (dbm).
Report was measured. The definition of this field complies with the
definition in section 8.4.2.24.7 of [IEEE-802.11.2012].
Reported Frame Information: This field contains two subfields as Screen Packet Count: Received packet number.
defined in [IEEE-802.11.2012].
RCPI: Indicates the received channel power of the Beacon, Measurement Neighbor Count: The neighbor number of this channel.
Pilot, or Probe Response frame.
RSNI:Indicates the received signal to noise indication for the Mean Noise: the average noise on this channel.
Beacon, Measurement Pilot, or Probe Response frame.
BSSID: This field contains the BSSID from the Beacon,Measurement Interference: The interference of the channel, including STA
Pilot, or Probe Response frame being reported. interference and WTP interference.
Antenna ID: This field contains the identifying number for the WTP Tx Occp: (The WTP sending duration time/Monitor time)*255.
antennas used for this measurement. The WTP sending duration time is the total sending time of
the WTP during the period of channel scan.
Parent TSF: This field contains the lower 4 octets of the measuring WTP Rx Occp: (The WTP receiving duration time/Monitor time)*255.
station's TSF timer value at the start of reception of the first THe WTP receiving duration time is the total receiving time of
octet of the timestamp field of the reported Beacon, Measurement the WTP during the period of channel scan.
Pilot, or Probe Response frame at the time the Beacon frame being
reported was received.
Optional Subelements: This field contains zero or more subelements. Unknown Occp: (All other packet transmission time duration/Monitor
time)*255.
4.3.4. IEEE 802.11 Neighbor WTP Report CRC Err Cnt: CRC err packet number.
This document specifies that the WTP MAY include an instance of the Decrypt Err Cnt: Decryption err packet number.
IEEE 802.11 Neighbor Report Element defined in section 8.4.2.39 of
[IEEE-802.11.2012] within IEEE 802.11 Information Element message Phy Err Cnt: Physical err packet number.
element defined in section 6.6 of [RFC5416] to report neighbouring
WTP information to the AC. Retrans Cnt: Retransmission packet number.
4.3.4. IEEE 802.11 WTP Neighbor Report
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Element ID | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Radio ID | Reserved | Number of Neighbor Report |
+---------------------------------------------------------------+
| Neighbor Infor... |
+---------------------------------------------------------------+
Figure 10: WTP Neighbor Report TLV
The definition of Neighbor info is as follows:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| BSSID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| BSSID | Channel Number |
+---------------------------------------------------------------+
| 2nd Offset | Mean RSSI | Sta Intf | AP Intf |
+---------------------------------------------------------------+
Figure 11: Neighbor info
BSSID: The BSSID of this neighbor WTP.
Channel Number: The channel number of this WTP neighbor.
2nd channel offset: The auxiliary channel offset of this WTP.
Mean RSSI: The average signal strength of this WTP (dbm).
Sta Intf: (The station air interface occupation time/Monitor
time)*255. The station air interface occupation time is the
air interface occupation time caused by the stations which are connected
to this WTP.
AP Intf: (The WTP air interface occupation time/Monitor time)*255.
The WTP air interface occupation time is the air interface occupation
time caused by the WTP.
5. Security Considerations 5. Security Considerations
This document is based on RFC5415/RFC5416 and adds no new security This document is based on RFC5415/RFC5416 and adds no new security
considerations. considerations.
6. IANA Considerations 6. IANA Considerations
The extension defined in this document need to extend CAPWAP IEEE The extension defined in this document need to extend CAPWAP IEEE
802.11 binding message element which is defined in section 6 of 802.11 binding message element which is defined in section 6 of
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