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STA MIB Statistics

STA MIB Statistics. Simon Black, Hasse Sinivaara (Nokia) simon.black@motix.demon.co.uk, hasse.sinivaara@nokia.com TGk July 2003. From 11-03-080r0 Framework RRM Dataflow Diagram D: STA Statistics Gathering. Radio Interface. DS Interface. Access Point. Station. Network Management Station.

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STA MIB Statistics

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  1. STA MIB Statistics Simon Black, Hasse Sinivaara (Nokia)simon.black@motix.demon.co.uk, hasse.sinivaara@nokia.com TGk July 2003 Black/Sinivaara, Nokia

  2. From 11-03-080r0 FrameworkRRM Dataflow Diagram D: STA Statistics Gathering Radio Interface DS Interface AccessPoint Station Network Management Station MIB Data MIB Data Remote Management Remote RRM Algorithms MIB MIB request MIB request Black/Sinivaara, Nokia

  3. STA Statistics • STA MAC statistics • May give insight into link conditions being experienced by the STA • Retries • FCS Errors • ACK failures • This information may be useful to a network management entity so how do we get at it? • In the 1999 standard statistics appear in two MIB groups • dot11CountersGroup is mandatory • dot11MACStatistics group is optional Black/Sinivaara, Nokia

  4. STA MIB Access • Propose to solve this issue at layer 2 by using MAC frames • Use the IEEE802.11h measurement request-report mechanism and treat the statistics as a measurement type • We can specify this in the RRM standard – no need to specify upper layers • The .11h based architecture and protocols are already under discussion in TGk • We can request counters as absolute values, or over a defined measurement window Black/Sinivaara, Nokia

  5. Measurement Request FrameSTA Statistics Request Category = RRM Action = Measurement Request DialogToken MeasurementRequest Element Coding using MIB group Identifier Element ID = Measurement Request Length MeasurementToken MeasurementRequest Mode Measurement Type = STA Statistics Group ID MeasurementDuration (TU) Duration allows absolute or difference measurements Black/Sinivaara, Nokia

  6. Measurement Report FrameSTA Statistics Report Category = RRM Action = Measurement Report DialogToken MeasurementReport Element Element ID= Measurement Report Length MeasurementToken MeasurementReport Mode Measurement Type = STA Statistics MeasurementDuration (TU) Group Data Black/Sinivaara, Nokia

  7. Protocol Architecture Per STA statistics may be made accessible in SME MIB SNMP SET/GET STA MAC statistics AP MAC statistics SMEPer-STA MIB SME MAC MIB MAC MIB MAC MAC SME PHY PHY Measure Report Measure Request Station RRM Action MAC Management Frames Access Point Black/Sinivaara, Nokia

  8. Details • Group field indicates requested statistics group • Single octet containing TGk assigned codes • to existing MIB groups, or • to TGk defined groups • If duration in request = 0, then return absolute values at measurement time • If duration = nTU, then return counts in measurement window Black/Sinivaara, Nokia

  9. One Group DefinedSTA MIB dot11CountersTable Dot11CountersEntry ::= SEQUENCE { dot11TransmittedFragmentCount Counter32, dot11MulticastTransmittedFrameCount Counter32, dot11FailedCount Counter32, dot11RetryCount Counter32, dot11MultipleRetryCount Counter32, dot11FrameDuplicateCount Counter32, dot11RTSSuccessCount Counter32, dot11RTSFailureCount Counter32, dot11ACKFailureCount Counter32 dot11ReceivedFragmentCount Counter32, dot11MulticastReceivedFrameCount Counter32, dot11FCSErrorCount Counter32, dot11TransmittedFrameCount Counter32, PICS Mandatory Statistics in bold PICS Optional Statistics in normal Black/Sinivaara, Nokia

  10. Extensions • Can easily be extended to support other statistics groups • For example 802.11e/D4.0 adds dot11QosCountersTable • Statistics per Traffic Identifier (TID) • PICS does not specify status in IEEE802.11e/D4.0 • TGk defined groups? Black/Sinivaara, Nokia

  11. Summary • Normative text is proposed in a companion submission Black/Sinivaara, Nokia

  12. STA MIB Statistics Simon Black, Hasse Sinivaara (Nokia)simon.black@qosine.co.uk, hasse.sinivaara@nokia.com TGk March 2003 Black/Sinivaara, Nokia

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