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TPCv2 / RRM

TPCv2 / RRM . Note: View Notes Pages of PPT Slides. Presenter Name: James Noxon TAC Content Reviewer:. Agenda – New Features. TPCv2 RF Profiles Reference Materials. Transmit Power Control version 2. TPCv2 - Overview.

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TPCv2 / RRM

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  1. TPCv2 / RRM • Note: View Notes Pages of PPT Slides Presenter Name: James Noxon TAC Content Reviewer:

  2. Agenda – New Features • TPCv2 • RF Profiles • Reference Materials

  3. Transmit Power Control version 2

  4. TPCv2 - Overview • TPCv1 is designed to provide strong signal coverage with a tendency to use higher TxPower • As a result, escalation teams have reported customer cases suffering from overheating in densely deployed networks • TPCv2 will optimize the coverage and the interference in a coordinated way based on the measurement readings from APs • TPCv2 identifies the deployment density that each AP experiences, and determines TxPower for that AP considering: • The overlap area / the amount of interference that adjacent APs generate • The coverage area that each AP generates • A novel Co-channel interference metric.

  5. TPCv2 - Overview Introduces two new features: • Redundant AP List • TPCv2 algorithm detects APs that contribute more to interference than to coverage expansionand which be manually disabled without adversely impacting coverage • TPCv2 does not automatically disable / enable APs’sradios • Essentially a new proprietary metric for Co-Channel interference • Determines the number of excessive APs seen in the network • Memoryfulevolution of the plan • Unlike TPCv1 where the channel plan is computed with each itineration of the algorithm implemented and then forgotten – Fire and Forget • TPCv2 finds a best plan, declared the Target Plan, and then deploys the Target Plan incrementally, but not abruptly allowing the network to evolve gradually – Gradual improvement over time

  6. TPCv2 - Overview • For appropriate marketing purpose, we show AP Utility instead of actual redundant AP list • AP Utility represents the percentage of time (more precisely the percentage of RRM executions) during which the AP of interested was marked as non-redundant. • For Example - TPC runs 100 times after controller is reset and a particular AP was marked redundant 10 out of 100 times then the AP utility figure is 90% • AP utility information is only visible from the controller CLI using: • show advanced 802.11a summary • show advanced 802.11b summary

  7. TPCv2 - Caveats • TPCv2 inherits the same messaging path and the functional interfaces from TPCv1. • As a result, the change in the TPC algorithm remains quite transparent on the outside • However TPCv2 does require changes from previous releases, specifically in RRM messaging • Although the grouping algorithm will not be directly affected by these changes – TPCv1 and TPCv2 groups will not be interoperable

  8. TPCv2 - Caveats • TPCv2 runs in a flexible manner and is skipped if the previous computation or deployment is still pending • The TPCv2 outcome controls the transmission power of the Beacons as well as downstream data packets. • Reduced Txpower implies less interference at neighboring cells and decreased RSSI at served clients within the cell. • The decreased RSSI may lead to: • Client drop out • Increased Packet Error Rate • A switch to a slow modulation speed. • This is a delicate balancing problem with no single solution. The right way to hit the balance is the optimization of the configuration through the simulation and the field test. .

  9. TPCv2 – CLI Configuration Commands • To configure the TPC version in use by the WLC use: • config advanced 802.11a tpc-version <version> • config advanced 802.11b tpc-version <version> • To configure the TPCv2 algorithm parameters in use by the WLC use: • config advanced 802.11a tpcv2-thresh <thresh> • config advanced 802.11a tpcv2-per-chan <enable|disable> • config advanced 802.11b tpcv2-thresh <thresh> • config advanced 802.11b tpcv2-per-chan <enable|disable>

  10. TPCv2 – CLI Verification Commands • To show the current TPC version and TxPower plan quality in use by the WLC use: • show advanced 802.11a txpower • show advanced 802.11b txpower Example output Overall quality, coverage, and Co-channel interference metrics

  11. TPCv2 – CLI Verification Commands • To see the current TPC running configuration and the list of Redundant APs on the WLC use: • show advanced 802.11a summary • show advanced 802.11b summary Example output Here the AP named AP3502-CA shows as a Redundant AP which could have the 2.4GHz radio disabled

  12. RF Profiles

  13. RF Profiles - Overview • Common for area’s requiring conflicting coverage to border one another • For example – A large conference room bordered by open cubicle space • Providing adequate coverage in high density areas typical entails deploying a high number of APs • Generally requiring manipulation of both data rates and transmit power levels • Raising the cell density while still managing co-channel interference issues • Adjacent areas requiring normal coverage are adversely impacted by these same changes – typically showing up as a loss in coverage • While RF Groups have always been available 7.2 introduces RF profiles to overcome these problems • The combination of RF Profiles and Groups allow administrators to optimize the RRM settings for groups of AP’s operating in different coverage models

  14. RF Profiles - Overview • RF Profiles allow the administrator to tune groups of AP’s sharing a common coverage zone together. • Selectively changing how RRM will operate the AP’s within that coverage zone • RF Profiles are created for either the 2.4 GHz radio or 5GHz radio • Profiles are applied to groups of AP’s belonging to an AP Group, in which all AP’s in the group will have the same Profile Settings • There are two components to this feature: • RF Groups – Existing capability – No impact on channel selection algorithms • RF Profile – New in 7.2 providing administrative control over: • Min/Max TPC values • TPCv1 Threshold • TPCv2 Threshold • Data Rates

  15. RF Profiles - Overview • Application of an RF profile does not change the assigned AP’s status within RRM (RF Group assignment) • It is still in Global mode controlled by RRM– and all AP’s remain part of the same original RF Group. • CAUTION– AP Groups and RF Profiles can get complex quickly • Most installations have only a couple of different coverage zones that will benefit from having this feature • In most cases RRM is doing an adequate job already • In order for RF Profiles to work: • ALL AP’s assigned must have their channel and power managed by RRM • An AP that has a custom power setting applied for AP Power is not in Global Mode • An RF Profile will have no affect on this AP.

  16. RF Profiles - Implementing • RF Profile configuration and administration are supported via the: • WLC –CLI • WLC – GUI • Cisco Prime NCS version 1.1 • Exercise caution when implementing and changing RF Profiles as they can be client impacting • Changing the data rates of an AP radio requires the affected network be disabled • Applying an RF Profile to an AP Group that changes the data rates will require that the affected network (2.4 /5 GHz) be disabled • You can create RF Profiles and apply them to a New or empty AP group (no AP’s assigned) without either requiring the network to be disabled or rebooting the AP.

  17. RF Profiles - Implementing • Once you have created an AP Group and applied RF Profiles the new settings are in effect and the following rules around changes become effective: • RF Profiles must be applied and present on every controller that you intend to also apply the AP Group containing them to – or the action will fail for that controller. • Once you assign an RF Profile to an AP Group you can not make changes to that RF Profile – Even if there are no AP’s assigned. The assumption is that there are or could be active AP’s assigned on the profile. You will receive an error – • You must change the AP Group RF Profile settings to none in order to change the RF Profile – then add it back to the AP Group. • You can also work around this restriction by disabling the network that will be affected by the changes you will be making – either 802.11a or 802.11b. • You can assign the same RF Profile to more than one AP Group – just as you can a WLAN • Within the AP Group – changing the assignment of an RF Profile on either band causes the AP to reset (re-boot) – you will be warned. • You can not delete an RF Profile that is applied to an AP Group • You cannot delete an AP Group that has AP’s assigned to it.

  18. RF Profiles – Creation/Configuration via CLI • CLI - Commands used to Create and Configure RF Profiles: • 802.11a profile creation(Cisco Controller) >config rf-profile create 802.11a <name> • 802.11a profile configuration (Cisco Controller) >configrf-profile description <desc> <rf profile name> <name>(Cisco Controller) >configrf-profile tx-power-control-thresh-v1 -70 <profile_name>(Cisco Controller) >configrf-profile tx-power-max 22 <profile name>(Cisco Controller) >configrf-profile tx-power-min 14 <profile name>(Cisco Controller) >configrf-profile data-rates disabled 54 <profile name>(Cisco Controller) >configrf-profile data-rates disabled 48 <profile name>(Cisco Controller) >configrf-profile data-rates disabled 36 <profile name>(Cisco Controller) >configrf-profile data-rates disabled 24 <profile name>(Cisco Controller) >configrf-profile data-rates disabled 18 <profile name>(Cisco Controller) >configrf-profile data-rates disabled 12 <profile name>(Cisco Controller) >configrf-profile data-rates disabled 9 <profile name>(Cisco Controller) >configrf-profile data-rates disabled 6 <profile name>

  19. RF Profiles – Creation/Configuration via CLI • 802.11b profile creation(Cisco Controller) >config rf-profile create 802.11b <name> • 802.11b profile configuration(Cisco Controller) >configrf-profile description <desc> <rf profile name> <name>(Cisco Controller) >configrf-profile tx-power-control-thresh-v1 -50 <profile_name>(Cisco Controller) >configrf-profile tx-power-max 11 <profile name>(Cisco Controller) >configrf-profile tx-power-min -1 <profile name>(Cisco Controller) >configrf-profile data-rates disabled 1 <profile name>(Cisco Controller) >configrf-profile data-rates disabled 2 <profile name>(Cisco Controller) >configrf-profile data-rates disabled 5.5 <profile name>(Cisco Controller) >configrf-profile data-rates disabled 11 <profile name>

  20. RF Profiles – Verification via CLI • Display RF Profiles present on this controller: • (Cisco Controller) >show rf-profile summaryNumber of RF Profiles............................ 4RF Profile Name Band Description --------------------------------- ------- -----------------------------------NCS_HD_a5 GHz HD configs for 802.11aNCS_HD_b2.4 GHz HD config for 802.11btest 5 GHz test test3 5 GHz test3

  21. RF Profiles – Creation/Configuration via CLI • Display detailed information about a specific RF Profile: • (Cisco Controller) >show rf-profile details NCS_HD_a Description...................................... HD configs for 802.11a Radio policy..................................... 5 GHz Transmit Power Threshold v1...................... -70 dBm Transmit Power Threshold v2...................... -67 dBm Min Transmit Power............................... -10 dBm Max Transmit Power............................... 30 dBm 802.11a Operational Rates 802.11a 6M Rate.............................. Mandatory802.11a 9M Rate.............................. Supported 802.11a 12M Rate............................. Mandatory802.11a 18M Rate............................. Supported802.11a 24M Rate............................. Mandatory802.11a 36M Rate............................. Supported802.11a 48M Rate............................. Supported802.11a 54M Rate............................. Supported

  22. RF Profiles – Creation/Configuration via CLI • Show configured AP Groups – and which RF Profiles have been applied: • (Cisco Controller) >show wlanapgroups • Total Number of AP Groups........................ 1 • Site Name........................................ default-group • Site Description................................. <none> • RF Profile • ------------- • 2.4 GHz band..................................... <none> • 5 GHz band....................................... <none> • WLAN ID Interface Network Admission Control Radio Policy • ------------ ----------- ------------------------------------ ----------------- • 1 management Disabled None • 2 management Disabled None • 3 vlan200 Disabled None • AP Name Slots AP Model Ethernet MAC Location Port Country Priority ---------------------- ------ -------------------------- ---------------------- ------------------- ------ ---------- ---------- • AP0022.bd18.da96 2 AIR-CAP3502E-A-K9 00:22:bd:18:da:96 default location 1 US 1 • AP0022.bd18.ab11 2 AIR-CAP3502E-A-K9 00:22:bd:18:ab:11 default location 1 US 1 • AP0022.bd18.87c0 2 AIR-CAP3502E-A-K9 00:22:bd:18:87:c0 default location 1 US 1 • AP0022.bd18.a642 2 AIR-CAP3502E-A-K9 00:22:bd:18:a6:42 default location 1 US 1 • <SNIP>

  23. RF Profiles – Creation/Configuration via CLI • <SNIP> • Site Name........................................ Test3 • Site Description................................. Test3 • Venue Name....................................... Not configured • Venue Group...................................... Unspecified • Venue Type....................................... Unspecified • Language Code.................................... Not configured • RF Profile • ---------- • 2.4 GHz band..................................... <none> • 5 GHz band....................................... Test3 • WLAN ID Interface Network Admission Control Radio Policy • ------------ ------------- ------------------------------------ ---------------- • management Disabled None • AP Name Slots AP Model Ethernet MAC Location Port Country Priority • -------------------- ------ ---------------------- ----------------------- ------------------- ----- ----------- --------

  24. RF Profiles – Creation/Configuration GUI • From the Controller GUI select Wireless=>RF Profiles Select “New”, this opens the profile creation dialogue In order to crate a profile you will assign a name to the profile and select the band that you wish to create it for Select Apply, and the profile dialogue opens to allow customization of the power parameters

  25. RF Profiles – Creation/Configuration GUI • Add a description • Select if required the minimum and/or Maximum TPC settings – the minimum or maximum power that the AP’s this profile is assigned to will be allowed to use Select a custom TPC power threshold for either Version 1 or Version 2 of TPC

  26. RF Profiles – Creation/Configuration GUI • Select the data rates to be applied to the AP’s you will select to have this profile • Select Apply

  27. RF Profiles – Creation/Configuration GUI • To apply the newly created profiles to groups of AP’s: • Select WLANs=>Advanced=>AP Groups Selecting the group – opens the configuration dialogue For release 7.2 there are two new Tab’s added to the dialogue under AP Group

  28. RF Profiles – Creation/Configuration GUI • Select RF Profile screen to access the RF Profile configuration. You can select an RF Profile for each band, 802.11a/802.11b or you can select just one or none to apply through this group NOTE: Until you select AP’s and add them to the new group – no configurations will take place and you can save the new group configuration as is. Once you select AP’s and apply, the process of moving the AP’s into the new group will reboot the AP’s and the configurations for the profiles will be applied.

  29. RF Profiles – Creation/Configuration GUI • Choose the APs tab and select the AP’s that you wish to have use the new RF profiles – keep in mind when configuring this that AP’s can not belong to two AP Groups at once. Select APs to add Once you select the “Add APs” button in the upper right corner of the dialogue box. The following warning will be displayed Select OKto continue

  30. RF Profiles – NCS Configuration • Add Pats config slides here

  31. References

  32. Additional Information Mail Lists • @cisco.com • @cisco.com Additional Documentation EDCS-915206 TPCv2 Functional Specification EDCS-990613 TPCv2 Design Specification EDCS-992354 Cisco Co-Channel Interference Metric Cisco CUWN WLC 7.2 RRM Beta Guide

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