draft-ietf-opsawg-capwap-extension-04.txt   draft-ietf-opsawg-capwap-extension-05.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: Nov 10, 2014 Lei. Zhu Expires: April 26, 2015 Lei. Zhu
Huawei Huawei
May 10, 2014 October 27, 2014
CAPWAP Extension for 802.11n and Power/channel Autoconfiguration CAPWAP Extension for 802.11n and Power/channel Autoconfiguration
draft-ietf-opsawg-capwap-extension-04 draft-ietf-opsawg-capwap-extension-05
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.
skipping to change at page 1, line 38 skipping to change at page 1, line 39
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
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/. Drafts is at http://datatracker.ietf.org/drafts/current/.
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 20, 2014. This Internet-Draft will expire on April 26, 2015.
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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1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. CAPWAP 802.11n Support . . . . . . . . . . . . . . . . . . . 3 3. CAPWAP 802.11n Support . . . . . . . . . . . . . . . . . . . 3
3.1. CAPWAP Extension for 802.11n Support . . . . . . . . . . 4 3.1. CAPWAP Extension for 802.11n Support . . . . . . . . . . 4
3.1.1. 802.11n Radio Capability Information . . . . . . . . 4 3.1.1. 802.11n Radio Capability Information . . . . . . . . 4
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 Adjustment . . . . . . . . . . . . . . 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 Scan 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 WTP Neighbor Report . . . . . . . . . . . 14
5. Security Considerations . . . . . . . . . . . . . . . . . . . 15 5. Security Considerations . . . . . . . . . . . . . . . . . . . 15
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 15 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 15
7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 15 7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 15
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 16 8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 16
9. Normative References . . . . . . . . . . . . . . . . . . . . 16 9. Normative References . . . . . . . . . . . . . . . . . . . . 16
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 17 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 17
1. Introduction 1. Introduction
The 802.11-2009 [IEEE 802.11n.2009] standard was published in 2009 as IEEE Std 802.11n[TM]-2009 [IEEE 802.11n.2009] was published in 2009
an amendment to the IEEE 802.11-2007 standard to improve network as 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
signal strength and extend the coverage. signal strength and extend the coverage.
Capabilities of 802.11n such as radio capability, radio configuration Capabilities of 802.11n such as radio capability, radio configuration
and station information need to be supported by CAPWAP control and station information need to be supported by CAPWAP control
messages. The necessary extensions for this purpose are introduced messages. The necessary extensions for this purpose are introduced
skipping to change at page 3, line 47 skipping to change at page 3, line 47
scale deployment scenario, the operator needs to use 20MHz channel scale deployment scenario, the operator needs to use 20MHz channel
configuration in the 2.4GHz band to allow more non-overlapping configuration in the 2.4GHz band to allow more non-overlapping
channels. channels.
In the MAC layer, a new feature of 802.11n is Short Guard In the MAC layer, a new feature of 802.11n is Short Guard
Interval(GI). 802.11a/g uses an 800ns guard interval between the Interval(GI). 802.11a/g uses an 800ns guard interval between the
adjacent information symbols. In 802.11n, the GI can be configured adjacent information symbols. In 802.11n, the GI can be configured
to 400nm under good wireless conditions. to 400nm under good wireless conditions.
Another feature in the 802.11 MAC layer is Block ACK. 802.11n can use Another feature in the 802.11 MAC layer is Block ACK. 802.11n can use
one ACK frame to acknowledge several MAC Protocol Data Unit (MPDU) one ACK frame to acknowledge receipt of several MAC Protocol Data
receiving events. Units (MPDUs).
CAPWAP needs to be extended to support the above new 802.11n CAPWAP needs to be extended to support the above new 802.11n
features. CAPWAP should allow the access controller to know the features. CAPWAP should allow the access controller to know the
supported 802.11n features and the access controller should be able supported 802.11n features and the access controller should be able
to configure the different channel binding modes. This document to configure the different channel binding modes. This document
defines extensions of the CAPWAP 802.11 binding to support 802.11n defines extensions of the CAPWAP 802.11 binding to support 802.11n
features. features.
3.1. CAPWAP Extension for 802.11n Support 3.1. CAPWAP Extension for 802.11n Support
skipping to change at page 5, line 15 skipping to change at page 5, line 15
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.
S bit: A-MSDU configuration: Enable/disable Aggregate MAC Service S bit: A-MSDU configuration: Enable/disable Aggregate MAC Service
Data Unit (A-MSDU). Set to 0 if disabled. Set to 1 if enabled. Data Unit (A-MSDU). Set to 0 if disabled. Set to 1 if enabled.
P bit: A-MPDU configuration: Enable/disable Aggregate MAC Protocol P bit: A-MPDU configuration: Enable/disable Aggregate MAC Protocol
Data Unit (A-MPDU). Set to 0 if disabled. Set to 1 if enabled. Data Unit (A-MPDU). Set to 0 if disabled. Set to 1 if enabled.
N bit: 11n Only configuration: Whether to allow only 11n user access. N bit: 11n Only configuration: Whether to allow only 11n user access.
Set to 0 if non-802.11n user access is allowed. Set to 1 if Set to 0 if non-802.11n user access is allowed. Set to 1 if non-
non-802.11n user access is not allowed. 802.11n user access is not allowed.
G bit: Short GI configuration: Set to 0 if Short Guard Interval is G bit: Short GI configuration: Set to 0 if Short Guard Interval is
disabled. Set to 1 if enabled. disabled. Set to 1 if enabled.
B bit: Bandwidth binding mode configuration: Set to 0 if 40MHz B bit: Bandwidth binding mode configuration: Set to 0 if 40MHz
binding mode. Set to 1 if 20MHz binding mode. binding mode. Set to 1 if 20MHz binding mode.
Maximum supported MCS: Maximum Modulation and Coding Scheme (MCS) Maximum supported MCS: Maximum Modulation and Coding Scheme (MCS)
index. It indicates the maximum MCS index that the WTP or the STA index. It indicates the maximum MCS index that the WTP or the STA
can support. can support.
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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 Adjustment 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 Reqest 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
Configure Update Req(Scan Parameter Message Element, Channel Bind Message Element ) Configure Update Req(Scan Parameter Message Element, Channel Bind Message Element )
<----------------------------------------------------- <-----------------------------------------------------
Configure Update Res Configure Update Response
-----------------------------------------------------> ----------------------------------------------------->
Figure 4: Channel Scan Procedure Figure 4: Channel Scan Procedure
The WTP has two work modes: normal mode and scan only mode. In The WTP has two work modes: normal mode and scan only mode. In
normal mode, the WTP can provide service for station access and scan normal mode, the WTP can provide service for station access and scan
channels at the same time. Whether the WTP will scan a given set of channels at the same time. Whether the WTP will scan a given set of
channels is determined by the Max Cycles field in the IEEE 802.11 channels is determined by the Max Cycles field in the IEEE 802.11
Channel Bind message element defined in Section 5.2. When this field Channel Bind message element defined in Section 4.3.2. When this
is set to 0, the WTP will not scan the channel. If this field is set field is set to 0, the WTP will not scan the channel. If this field
to 255, the WTP will scan the channel continuously. The type of the is set to 255, the WTP will scan the channel continuously. The type
scan is determined by the Scan Type field. With the passive scan of the scan is determined by the Scan Type field. With the passive
type, the WTP monitors the air interface, using the received beacon scan type, the WTP monitors the air interface, using the received
frames to determine the nearby WTPs. With the active scan type, the beacon frames to determine the nearby WTPs. With the active scan
WTP will send a probe message and receive probe response messages. type, the WTP will send a probe message and receive probe response
messages. In this case, the WTP may need to operate in station mode
which means it is not a WTP function only device, it also has part of
station function.
In the normal scan mode, the WTP behaviour is controlled by three In normal mode, the WTP behaviour is controlled by three parameters:
parameters: PrimeChlSrvTime, OnChannelScanTIme, and PrimeChlSrvTime, OnChannelScanTIme, and OffChannelScnTIme. These are
OffChannelScnTIme. These are provided by the IEEE 802.11 Scan provided by the IEEE 802.11 Scan Parameters message element defined
Parameters message element defined in Section 5.1. The WTP will in Section 4.3.1. The WTP will provide access service for stations
provide access service for stations for the duration given by for the duration given by PrimeChlSrvTime. It then scans the working
PrimeChlSrvTime. It then scans the working channel for the duration channel for the duration given by OnChannelScnTime. It returns to
given by OnChannelScnTime. It returns to servicing station access servicing station access requests on the working channel for another
requests on the working channel for another period of length period of length PrimeChlSrvTime, then moves to a different channel
PrimeChlSrvTime, then moves to a different channel and scans it for and scans it for duration OffChannelScnTime. It repeats this cycle,
duration OffChannelScnTIme. It repeats this cycle, scanning a new scanning a new non-working channel each time, until all the channels
non-working channel each time, until all the channels have been have been scanned.
scanned.
When the WTP works in scan only mode, it does not distinguish between When the WTP works in scan only mode, it does not distinguish between
the working channel and scan channel. Every channel's scan duration the working channel and scan channel. Every channel's scan duration
will be OffChannelScnTime and PrimeChlSrvTime and OnChannelScanTime will be OffChannelScnTime and PrimeChlSrvTime and OnChannelScanTime
MUST be set to 0. MUST be set to 0.
As shown in Figure 4, the AC can control the scan behaviour at the As shown in Figure 4, the AC can control the scan behaviour at the
WTP by including the IEEE 802.11 Scan Parameters and IEEE 802.11 WTP by including the IEEE 802.11 Scan Parameters and IEEE 802.11
Channel Bind message elements in a Configure Status Response or WTP Channel Bind message elements in a Configure Status Response or WTP
Configure Update Request message. Configure Update Request message.
Scan Report. After completing its scan, the WTP MAY send the scan Scan Report. After completing its scan, the WTP MAY send the scan
report to the AC using a WTP Event Request message. The scan report report to the AC using a WTP Event Request message. The scan report
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 4.3.3) and an instance of the IEEE 802.11
Element message element carrying a copy of theIEEE 802.11 Neighbor Information Element message element carrying a copy of theIEEE 802.11
WTP Report information element (Section 5.4). Neighbor WTP Report information element (Section 4.3.4).
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 |
skipping to change at page 10, line 24 skipping to change at page 10, line 24
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. 0:normal mode. 1: monitor only mode, no M bit: Work mode of the WTP. 0:normal mode. 1: scan only mode, no
service is provided in this mode. service is provided in this mode.
S bit: Scan Type: 0: active scan; 1: 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
to 1. The maximum value of this segment is 10000, the minimum value to 1. The maximum value of this segment is 10000, the minimum value
of this segment is 5000, the default value is 5000. of this segment is 5000, the default value is 5000.
On Channel ScanTime: The scan time (unit: millisecond) of the working On Channel ScanTime: The scan time (unit: millisecond) of the working
channel. When the WTP oper mode is set to 2, this segment is channel. When the M bit is set to 1, this segment is invalid(set to
invalid(set to 0). The maximum value of this segment is 120, the 0). The maximum value of this segment is 120, the minimum value of
minimum value of this segment is 60, the default value is 60. this segment is 60, the default value is 60.
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 Scan Channel Bind Message Element
The format of the IEEE 802.11 Channel Bind Message Element is as The format of the IEEE 802.11 Scan 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.| | Radio ID | Flag | Max Cycles |Channel Count |ScanChannelSet.|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +---------------+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 6: IEEE 802.11 Channel Bind Message Element Figure 6: IEEE 802.11 Scan Channel Bind Message Element
Type: TBD4 for IEEE 802.11 Channel Bind Message Element. Type: TBD4 for IEEE 802.11 Scan Channel Bind Message Element.
Length: 4. Length: variable.
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.
Flag: bitmap, reserved. Flag: reserved.
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:
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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 Report and Neighbor There are two types of scan report: Channel Scan Report and WTP
STA Report. Channel Scan Report is used to channel autoconfiguration Neighbor Report. Channel Scan Report is used to channel
while Neighbor WTP Report is used to power autoconfiguration. The autoconfiguration while WTP Neighbor Report is used to power
WTP send the scan report to the AC through WTP Event Request message. autoconfiguration. The WTP send the scan report to the AC through
The information element that used to carry the scan report is Channel WTP Event Request message. The information element that used to
Scan Report Message Element and Neighbor WTP Report Message Element. carry the scan report is Channel Scan Report Message Element and WTP
Neighbor 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
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| 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.
skipping to change at page 13, line 28 skipping to change at page 13, line 28
Figure 9: Channel Scan Report Figure 9: Channel Scan Report
Channel Number: The channel number. Channel Number: The channel number.
Radar Statistics: Whether detect radar signal in this channel. 0x00: Radar Statistics: Whether detect radar signal in this channel. 0x00:
detect radar signal. 0x01: no radar signal is detected. detect radar signal. 0x01: no radar signal is detected.
Mean Time: Channel measurement duration (ms). Mean Time: Channel measurement duration (ms).
Mean RSSI: The average signal strength of the scanned channel (dbm). Mean RSSI: The average signal strength of the scanned channel
(dBm(2's complement)).
Screen Packet Count: Received packet number. Screen Packet Count: Received packet number.
Neighbor Count: The neighbor number of this channel. Neighbor Count: The neighbor number of this channel.
Mean Noise: the average noise on this channel. Mean Noise: the average noise on this channel (dBm(2's complement)).
Interference: The interference of the channel, including STA Interference: The interference of the channel, including STA
interference and WTP interference. interference and WTP interference.
WTP Tx Occp: (The WTP sending duration time/Monitor time)*255. WTP Tx Occp: (The WTP transmission time/Monitor time)*255. The WTP
The WTP sending duration time is the total sending time of transmission time is the total sending time of the WTP during the
the WTP during the period of channel scan. period of channel scan.
WTP Rx Occp: (The WTP receiving duration time/Monitor time)*255. WTP Rx Occp: (The WTP receiving duration time/Monitor time)*255. THe
THe WTP receiving duration time is the total receiving time of WTP receiving duration time is the total receiving time of the WTP
the WTP during the period of channel scan. during the period of channel scan.
Unknown Occp: (All other packet transmission time duration/Monitor Unknown Occp: (All other packet transmission time duration/Monitor
time)*255. time)*255.
CRC Err Cnt: CRC err packet number. CRC Err Cnt: CRC err packet number.
Decrypt Err Cnt: Decryption err packet number. Decrypt Err Cnt: Decryption err packet number.
Phy Err Cnt: Physical err packet number. Phy Err Cnt: Physical err packet number.
Retrans Cnt: Retransmission packet number. Retrans Cnt: Retransmission packet number.
Note:The values of the above four count fields for a non-operational
channel can be ignored
4.3.4. IEEE 802.11 WTP Neighbor Report 4.3.4. IEEE 802.11 WTP Neighbor Report
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Element ID | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Radio ID | Reserved | Number of Neighbor Report | | Radio ID | Reserved | Number of Neighbor Report |
+---------------------------------------------------------------+ +---------------------------------------------------------------+
| Neighbor Infor... | | Neighbor Infor... |
+---------------------------------------------------------------+ +---------------------------------------------------------------+
Figure 10: WTP Neighbor Report TLV Figure 10: WTP Neighbor Report TLV
The definition of Neighbor info is as follows: The definition of Neighbor info 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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| BSSID | | BSSID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| BSSID | Channel Number | | BSSID | Channel Number |
+---------------------------------------------------------------+ +---------------------------------------------------------------+
| 2nd Offset | Mean RSSI | Sta Intf | AP Intf | | 2nd Offset | Mean RSSI | Sta Occp | WTP Occp |
+---------------------------------------------------------------+ +---------------------------------------------------------------+
Figure 11: Neighbor info Figure 11: Neighbor info
BSSID: The BSSID of this neighbor WTP. BSSID: The BSSID of this neighbor WTP.
Channel Number: The channel number of this WTP neighbor. Channel Number: The channel number of this WTP neighbor.
2nd channel offset: The auxiliary channel offset of this WTP. 2nd channel offset: The auxiliary channel offset of this WTP.
Mean RSSI: The average signal strength of this WTP (dbm). Mean RSSI: The average signal strength of this WTP (dbm).
Sta Intf: (The station air interface occupation time/Monitor Sta Occp: (The station air interface occupation time/Monitor
time)*255. The station air interface occupation time is the time)*255.The station air interface occupation time is the air
air interface occupation time caused by the stations which are connected interface occupation time caused by the stations which are connected
to this WTP. to this WTP.
AP Intf: (The WTP air interface occupation time/Monitor time)*255. WTP Occp: (The WTP air interface occupation time/Monitor time)*255.
The WTP air interface occupation time is the air interface occupation The WTP air interface occupation time is the air interface occupation
time caused by the WTP. 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
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[RFC5416]. The following IEEE 802.11 specific message element type [RFC5416]. The following IEEE 802.11 specific message element type
need to be defined by IANA. need to be defined by IANA.
TBD1: 802.11n Radio Configuration Message Element type value TBD1: 802.11n Radio Configuration Message Element type value
described in section 4.1.2. described in section 4.1.2.
TBD2: 802.11n Station Message Element type value described in section TBD2: 802.11n Station Message Element type value described in section
4.1.3. 4.1.3.
TBD3: 802.11 Scan Parameter Message Element type value described in TBD3: 802.11 Scan Parameter Message Element type value described in
section 5.3.1. section 4.3.1.
TBD4: 802.11 Channel Bind Message Element type value described in TBD4: 802.11 Channel Bind Message Element type value described in
section 5.3.2. section 4.3.2.
TBD5: Channel Scan Report Message Element type value described in TBD5: Channel Scan Report Message Element type value described in
section 5.3.3. section 4.3.3.
TBD6 entry for WTP Neighbor Report as descrbed in section 4.3.4 .
7. Contributors 7. Contributors
This draft is a joint effort from the following contributors: This draft is a joint effort from the following contributors:
Gang Chen: China Mobile chengang@chinamobile.com Gang Chen: China Mobile chengang@chinamobile.com
Naibao Zhou: China Mobile zhounaibao@chinamobile.com Naibao Zhou: China Mobile zhounaibao@chinamobile.com
Chunju Shao: China Mobile shaochunju@chinamobile.com Chunju Shao: China Mobile shaochunju@chinamobile.com
Hao Wang: Huawei3Come hwang@h3c.com Hao Wang: Huawei3Come hwang@h3c.com
Yakun Liu: AUTELAN liuyk@autelan.com Yakun Liu: AUTELAN liuyk@autelan.com
Xiaobo Zhang: GBCOM Xiaobo Zhang: GBCOM
Xiaolong Yu: Ruijie Networks Xiaolong Yu: Ruijie Networks
Song zhao: ZhiDaKang Communications Song zhao: ZhiDaKang Communications
Yiwen Mo: ZhongTai Networks Yiwen Mo: ZhongTai Networks
Dorothy Stanley: dstanley1389@gmail.com Dorothy Stanley: dstanley1389@gmail.com
Tom Taylor: tom.taylor.stds@gmail.com Tom Taylor: tom.taylor.stds@gmail.com
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suggestions. The authors also thanks Dorothy Stanley and Tom Taylor suggestions. The authors also thanks Dorothy Stanley and Tom Taylor
for their review and useful comments. for their review and useful comments.
9. Normative References 9. Normative References
[IEEE-802.11.2009] [IEEE-802.11.2009]
"IEEE Standard for Information technology - "IEEE Standard for Information technology -
Telecommunications and information exchange between Telecommunications and information exchange between
systems Local and metropolitan area networks - Specific systems Local and metropolitan area networks - Specific
requirements Part 11: Wireless LAN Medium Access Control requirements Part 11: Wireless LAN Medium Access Control
(MAC) and Physical Layer (PHY) Specifications", 2009. (MAC) and Physical Layer (PHY) Specifications,
Enhancements for Higher Throughput (Amendment 5)", 2009.
[IEEE-802.11.2012] [IEEE-802.11.2012]
"IEEE Standard for Information technology - "IEEE Standard for Information technology -
Telecommunications and information exchange between Telecommunications and information exchange between
systems Local and metropolitan area networks - Specific systems Local and metropolitan area networks - Specific
requirements Part 11: Wireless LAN Medium Access Control requirements Part 11: Wireless LAN Medium Access Control
(MAC) and Physical Layer (PHY) Specifications", March (MAC) and Physical Layer (PHY) Specifications", March
2012. 2012.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
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