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 | |||
skipping to change at page 2, line 22 | skipping to change at page 2, line 22 | |||
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. | |||
skipping to change at page 8, line 26 | skipping to change at page 8, line 26 | |||
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: | |||
skipping to change at page 12, line 7 | skipping to change at page 12, line 7 | |||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |||
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 | |||
skipping to change at page 15, line 33 | skipping to change at page 15, line 37 | |||
[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 | |||
skipping to change at page 16, line 28 | skipping to change at page 16, line 38 | |||
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 | |||
End of changes. 43 change blocks. | ||||
81 lines changed or deleted | 90 lines changed or added | |||
This html diff was produced by rfcdiff 1.41. The latest version is available from http://tools.ietf.org/tools/rfcdiff/ |