draft-ietf-opsawg-capwap-extension-05.txt   draft-ietf-opsawg-capwap-extension-06.txt 
OPSAWG Y. Chen OPSAWG Y. Chen
Internet-Draft D. Liu Internet-Draft China Mobile
Updates: 5416 (if approved) H. Deng Updates: 5416 (if approved) D. Liu
Intended status: Standards Track China Mobile Intended status: Standards Track
Expires: April 26, 2015 Lei. Zhu Expires: January 7, 2016 H. Deng
China Mobile
Lei. Zhu
Huawei Huawei
October 27, 2014 July 6, 2015
CAPWAP Extension for 802.11n and Power/channel Autoconfiguration CAPWAP Extension for 802.11n and Power/channel Autoconfiguration
draft-ietf-opsawg-capwap-extension-05 draft-ietf-opsawg-capwap-extension-06
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
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This Internet-Draft will expire on April 26, 2015. This Internet-Draft will expire on January 7, 2016.
Copyright Notice Copyright Notice
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document authors. All rights reserved. document authors. All rights reserved.
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TxAntenna: Transmitting antenna configuration. Each TxAntenna bit TxAntenna: Transmitting antenna configuration. Each TxAntenna bit
represents a certain number of antennas. Set to 1 if enabled, set to represents a certain number of antennas. Set to 1 if enabled, set to
0 if disabled. 0 if disabled.
RxAntenna: Receiving antenna configuration. Each RxAntenna bit RxAntenna: Receiving antenna configuration. Each RxAntenna bit
represents a certain number of antennas. Set to 1 if enabled, set to represents a certain number of antennas. Set to 1 if enabled, set to
0 if disabled. 0 if disabled.
The detail definition of TxAntenna/RxAntenna is as follows: The detail definition of TxAntenna/RxAntenna is as follows:
0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
|8|7|6|5|4|3|2|1| |8|7|6|5|4|3|2|1|
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
Figure 2: Definition of TxAntenna/RxAntenna Figure 2: Definition of TxAntenna/RxAntenna
Each bit when enabled will represent the number of antennas Each bit when enabled will represent the number of antennas
correspondent to that bit. Only one bit is allowed to be set to 1. correspondent to that bit. Only one bit is allowed to be set to 1.
For example, when the first bit is enabled,it represents 8 antennas. For example, when the first bit is enabled,it represents 8 antennas.
3.1.3. 802.11n Station Information 3.1.3. 802.11n Station Information
The 802.11n Station Information message element is used to deliver The 802.11n Station Information message element is used to deliver
IEEE 802.11n station policy from the AC to the WTP. The definition IEEE 802.11n station policy from the AC to the WTP. The definition
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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 Reqest 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 Response 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 4.3.2. When this Channel Bind message element defined in Section 4.3.2. When this
field is set to 0, the WTP will not scan the channel. If this field field is set to 0, the WTP will not scan the channel. If this field
is set to 255, the WTP will scan the channel continuously. The type is set to 255, the WTP will scan the channel continuously. The type
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In normal mode, the WTP behaviour is controlled by three parameters: In normal mode, the WTP behaviour is controlled by three parameters:
PrimeChlSrvTime, OnChannelScanTIme, and OffChannelScnTIme. These are PrimeChlSrvTime, OnChannelScanTIme, and OffChannelScnTIme. These are
provided by the IEEE 802.11 Scan Parameters message element defined provided by the IEEE 802.11 Scan Parameters message element defined
in Section 4.3.1. The WTP will provide access service for stations in Section 4.3.1. The WTP will provide access service for stations
for the duration given by PrimeChlSrvTime. It then scans the working for the duration given by PrimeChlSrvTime. It then scans the working
channel for the duration given by OnChannelScnTime. It returns to channel for the duration given by OnChannelScnTime. It returns to
servicing station access requests on the working channel for another servicing station access requests on the working channel for another
period of length PrimeChlSrvTime, then moves to a different channel period of length PrimeChlSrvTime, then moves to a different channel
and scans it for duration OffChannelScnTime. It repeats this cycle, and scans it for duration OffChannelScnTime. It repeats this cycle,
scanning a new non-working channel each time, until all the channels scanning a new non-working channel each time, until all the channels
have been scanned. have been scanned. This channel scan procedure can be used to
determine the interference of both the current working channel and
non-working channel to avoid potential interference.
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.
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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 4.3.3) and an instance of the IEEE 802.11 element (Section 4.3.3) and an instance of the IEEE 802.11
Information Element message element carrying a copy of theIEEE 802.11 Information Element message element carrying a copy of theIEEE 802.11
Neighbor WTP Report information element (Section 4.3.4). 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 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| 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.
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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 M bit is set to 1, this segment is invalid(set to channel. When the M bit is set to 1 (active scan), this segment is
0). The maximum value of this segment is 120, the minimum value of invalid(set to 0). The maximum value of this segment is 120, the
this segment is 60, the default value is 60. minimum value of 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 Scan Channel Bind Message Element 4.3.2. IEEE 802.11 Scan Channel Bind Message Element
The format of the IEEE 802.11 Scan 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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Radio ID | Flag | Max Cycles |Channel Count |ScanChannelSet.| | Radio ID | Flag | Max Cycles |Channel Count |ScanChannelSet.|
+---------------+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +---------------+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 6: IEEE 802.11 Scan Channel Bind Message Element Figure 6: IEEE 802.11 Scan Channel Bind Message Element
Type: TBD4 for IEEE 802.11 Scan Channel Bind Message Element. Type: TBD4 for IEEE 802.11 Scan Channel Bind Message Element.
Length: variable. 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.
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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 Report and WTP There are two types of scan report: Channel Scan Report and WTP
Neighbor Report. Channel Scan Report is used to channel Neighbor Report. Channel Scan Report is used to channel
autoconfiguration while WTP Neighbor Report is used to power autoconfiguration while WTP Neighbor Report is used to power
autoconfiguration. The WTP send the scan report to the AC through autoconfiguration. The WTP send the scan report to the AC through
WTP Event Request message. The information element that used to WTP Event Request message. The information element that used to
carry the scan report is Channel Scan Report Message Element and WTP carry the scan report is Channel Scan Report Message Element and WTP
Neighbor Report Message Element. 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 0 1
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 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.
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. in Figure 9.
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 Number | Radar Statistics | Mean | | Channel Number | Radar Statistics | Mean |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Time | Mean RSSI | Screen Packet Count | | Time | Mean RSSI | Screen Packet Count |
+---------------------------------------------------------------+ +---------------------------------------------------------------+
| NeighborCount| Mean Noise | Interference | WTP Tx Occp | | NeighborCount| Mean Noise | Interference | WTP Tx Occp |
+---------------------------------------------------------------+ +---------------------------------------------------------------+
| WTP Rx Occp | Unknown Occp | CRC Err Cnt | Decrypt Err Cnt | | WTP Rx Occp | Unknown Occp | CRC Err Cnt | Decrypt Err Cnt |
+---------------------------------------------------------------+ +---------------------------------------------------------------+
|Phy Err Cnt | Retrans Cnt | |Phy Err Cnt | Retrans Cnt |
+-----------------------------+ +-----------------------------+
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 Mean RSSI: The average signal strength of the scanned channel
(dBm(2's complement)). (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 (dBm(2's complement)). 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.
interference and WTP interference.
WTP Tx Occp: (The WTP transmission time/Monitor time)*255. The WTP WTP Tx Occp: (The WTP transmission time/Monitor time)*255. The WTP
transmission time is the total sending time of the WTP during the transmission time is the total sending time of the WTP during the
period of channel scan. period of channel scan.
WTP Rx Occp: (The WTP receiving duration time/Monitor time)*255. THe WTP Rx Occp: (The WTP receiving duration time/Monitor time)*255. THe
WTP receiving duration time is the total receiving time of the WTP WTP receiving duration time is the total receiving time of 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
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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 Note:The values of the above four count fields for a non-operational
channel can be ignored 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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| 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 Occp | WTP Occp | | 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).
skipping to change at page 16, line 4 skipping to change at page 15, line 50
TBD5: Channel Scan Report Message Element type value described in TBD5: Channel Scan Report Message Element type value described in
section 4.3.3. section 4.3.3.
TBD6 entry for WTP Neighbor Report as descrbed in section 4.3.4 . 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
skipping to change at page 17, line 28 skipping to change at page 17, line 28
Yifan Chen Yifan Chen
China Mobile China Mobile
No.32 Xuanwumen West Street No.32 Xuanwumen West Street
Beijing 100053 Beijing 100053
China China
Email: chenyifan@chinamobile.com Email: chenyifan@chinamobile.com
Dapeng Liu Dapeng Liu
China Mobile Beijing
No.32 Xuanwumen West Street
Beijing 100053
China China
Email: liudapeng@chinamobile.com Email: maxpassion@gmail.com
Hui Deng Hui Deng
China Mobile China Mobile
No.32 Xuanwumen West Street No.32 Xuanwumen West Street
Beijing 100053 Beijing 100053
China China
Email: denghui@chinamobile.com Email: denghui@chinamobile.com
Lei Zhu Lei Zhu
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