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Mapping PMIP QoS to WiFi Networks (draft-kaippallimalil-netext-pmip-qos-wifi-03)

Mapping PMIP QoS to WiFi Networks (draft-kaippallimalil-netext-pmip-qos-wifi-03). IETF 88 Vancouver, Canada. Updates from version - 02 to 03. Added 2 authors: Rajesh Pazhyannur, Parviz Yegani Two main chapters: 3 (admission control based mapping) and 4 (no-admission control)

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Mapping PMIP QoS to WiFi Networks (draft-kaippallimalil-netext-pmip-qos-wifi-03)

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  1. Mapping PMIP QoS to WiFi Networks(draft-kaippallimalil-netext-pmip-qos-wifi-03) IETF 88 Vancouver, Canada

  2. Updates from version-02 to 03 • Added 2 authors: Rajesh Pazhyannur, Parviz Yegani • Two main chapters: 3 (admission control based mapping) and 4 (no-admission control) • Use cases for admission control - MN Initiated QoS Signaling- Network Initiated QoS Signaling (802.11aa based)- Hybrid (WMM based) • DSCP mapping for non-admission control mechanism. • Other changes:- Moved the architecture section to Appendix.

  3. Why we need per user QoS(and what is missing) • WiFi radio is a limited resource and has to be managed to achieve better and fair utilization.For example, during WiFi radio congestion or for services like VoIP, per user/flow scheduling and policing can utilize the scarce resources better. • QoS Policies may be statically configured in WiFi AP on per service basis. However, it cannot differentiate per user. • Per user QoS policies for PMIP mobile sessions between MAG – LMA are available. DSCP of these flows can be used to prioritize flows at WiFi AP. However, other per user information (ARP, AMBR, GBR) needs to be addressed. • Mapping from parameters in PMIP QoS to 802.11 AC + other QoS parameters needs to be consistent when different providers and equipment are configured. Gap: • How to signal QoS in WiFi access when MN initiates request, and when network pushes QoS. • How to map WiFiQoS parameters to PMIP QoS.

  4. Background Information Policy AAA Network A LMA1 PEP PMIP-1 IP flow MN1 L2 with 802.11 QoS Network B LMA2 PMIP-2 IP flow L2 with 802.11 QoS MN2 IP flow offload OffloadNetwork AP/ WLC (MAG) • QoS in Mobile Networks provided for IP flow/session. Reservation of resources for GBR flows • QoS in WiFiprovided for Ethernet frames. No reservation of resources.

  5. Case A: MN Initiated QoS Signaling Policy Server MN AP/WLC (MAG) LMA MN attach/default bearer setup PBU (update, QoS-option) IP CAN Session/Gx PBA(QoS-option) Application Starts Dedicated Bearer: MN Session / INVITE, 183 Session Progress (SDP offer) Application Session/Rx ADDTS (TSPEC) PBU (update, QoS-option) Policy Request Policy Response PBA(QoS-option) ADDTS Response (TSPEC) • Need to associate IP flow/connection for PMIP session with WiFiQoS request TSPEC in ADDTS Request contains IP flow/connection identifier •  MAG associates request to PMIP session.

  6. Case B: Network Initiated QoS Signaling Policy Server MN AP/WLC (MAG) LMA MN attach/default bearer setup PBU (update, QoS-option) IP CAN Session/Gx PBA(QoS-option) Application Starts Dedicated Bearer: MN Session / INVITE, 183 Session Progress (SDP offer) Application Session/Rx Policy Update UPN (update session, QoS) ADDTS Reserve Request (TCLAS / appl id) UPA ADDTS Reserve Response PBU (update, QoS-option) PBA(QoS-option) • Need support of 802.11aa on AP/WLC and MN. •  MAG uses PBA with new QoS and associates IP flow/connection id. •  MAG sends ADDTS Reserve Request 6

  7. Case C:Hybrid Network init for PMIPv6, user initiated for WiFi Policy Server MN AP/WLC (MAG) LMA MN attach/default bearer setup PBU (update, QoS-option) IP CAN Session/Gx PBA(QoS-option) Application Starts Dedicated Bearer: MN Session / INVITE, 183 Session Progress (SDP offer) Application Session/Rx Policy Update UPN (update session, QoS) UPA Upper LayerIndication ADDTS (TSPEC) PBU (update, QoS-option) PBA(QoS-option) ADDTS Response (TSPEC) • Need support of 802.11aa on AP/WLC and MN. •  MAG uses PBA with new QoS and associates IP flow/connection id. •  MAG sends ADDTS Reserve Request 7 page 7

  8. Mapping of Connection Parameters • Connection Mapping TSPEC includes IP flow/connection id  PMIP session • QoS Class802.11 QoS 802.1D UP (and PMIP QoS) • BandwidthMean Data Rate <less than or equal to> GBR • Pre-emption PriorityARP may be used in AP/WLC (MAG) to determine which flow to grant resources/tear down flows on congestion (admission control case). • No reservation/ guarantees in WiFi networks.

  9. E2E QoS without Admission Control 0 1 2 3 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 +=+-+-+-+-+=+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | Reserved | +=+-+-+-+-+=+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | UP0 Range | UP1 Range | UP2 Range | UP3 Range | +=+-+-+-+-+=+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | UP4 Range | UP5 Range | UP6 Range | UP7 Range | +=+-+-+-+-+=+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | DSCP Ex-0 | DSCP Ex-1 | DSCP Ex-3 .... +=+-+-+-+-+=+-+-+-+-+-+-+-+-+-+-+-++-+-+-+ • Use DSCP – 802.1D UP mapping defined by GSMA and RFC 4594 • Alternatively, use QoS Map set attribute (above figure) for different mappings per user. Map set sent by LMA.

  10. PMIP – 802.11 QoS Mapping(added 802.1D UP) QCI DSCP 802.1D UP WMM AC Example Services ------------------------------------------------------------ 1 EF 6(VO) 3 AC_VO conversational voice 2 EF 6(VO) 3 AC_VO conversational video 3 EF 6(VO) 3 AC_VO real-time gaming 4 AF41 5(VI) 2 AC_VI buffered streaming 5 AF31 4(CL) 2 AC_VI IMS signaling 6 AF32 4(CL) 2 AC_VI buffered streaming 7 AF21 3(EE) 0 AC_BE interactive gaming 8 AF11 1(BE) 0 AC_BE web access 9 BE 0(BK) 1 AC_BK e-mail Table: QoS Mapping between QCI, 802.1D UP, WMM AC • Mapping of QCI/ DSCP  802.1D UP, WMM AC

  11. IETF next steps Request for reviews of this draft on mailing list.

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