End to End QoS Control over heterogeneous network

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Augustus Pierce
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1 Internatinal Telecmmunicatin Unin End t End QS Cntrl ver hetergeneus netwrk Olivier Dugen FTR&D Olivier.Dugen@range-ft.cm Wrkshp n End-t-End QE/QS

2 Outline Business aspect f QS cntrl Technical requirements fr QS cntrl End t End path cncept EuQS system architecture EuQS prttype deplyment Cnclusin Wrkshp n End-t-End QE/QS

3 1 - Wh we are 5 netwrk prviders (Prime Cntractr is Telefnica) 5 Crprates 5 SMEs (cnsultants, small develpment cmpanies) 9 Research Institutes Prviders EuQS Apprach Crprate SME Supprt the evlutin f the Internet int a multi-service netwrk Take a pragmatic apprach Sell QS as a new surce f revenue. Define business mdels Research Funding ver 3 years Kick-ff 1 September 2004 Wrkshp n End-t-End QE/QS

4 1 - Over-Prvisining slutin Simple t deply OPEX is equivalent Operatinal just manage bigger ruter and link The technlgy is the same just increase capacity N mre platfrm CAPEX is just investment made with 6 mnths advance (surce Sprint) But ver-prvisining just guarantee Bw & Lst N guarantee fr delay & jitter VIP is sensible t this QS parameters This ccur fr lng distance when crss several AS Wrkshp n End-t-End QE/QS

5 1 - Over-prvisining effects Flat rate mdel price & capacity availability advantage service prvider Applicatin like skype used the ver-prvisining netwrk fr free f charge Operatrs didn t get mre mney frm independent service prvider Assumptins: A netwrk with 4 CS with limited link capacity fr BE (lad arund 60%) Skype r ther s will nt wrk crrectly in laded BE Users must buy extra capacity fr QS i.e. VIP CS Bth Service prvider & Operatrs win mney in this case Wrkshp n End-t-End QE/QS

6 1 - End-t-End QS needs E2e QS crrespnd t the internatinal part f PSTN T yet studied in standardizatin: each Fra cncentrate t the access netwrk Culd be in such situatin with natinal call prvide by 2 different Service Prvider IMS is nt sufficient AS path cmputatin is nt f service rle: it depend f the transfer and cntrl level Nt all AS will implement an IMS i.e. transit AS All AS will certainly implement a QS cntrl functin Wrkshp n End-t-End QE/QS

7 2 - Requirements Scalable QS architecture IntServ ver DiffServ This was dne by perfrming IntServ CAC in the Access netwrk and used DiffServ in the Cre backbne Lightweight IntServ/RSVP This was dne by study/develp a new prtcl. NSIS culd be a candidate Endpints nly CAC methds This was dne by setup Traffic engineering tunnel r by measurement at the endpint Finally EuQS is a mix f them Wrkshp n End-t-End QE/QS

8 2 - Divide and Cnquer the prblem Addressing the netwrk deplyment acrss a large number f autnmus systems (AS) Hierarchically and functinally decmpsed int: Hrizntal paradigms Service, Cntrl and Transprt planes Vertical netwrk partitin - hetergeneus technlgies LAN, WiFi, xdsl, Satellite, UMTS, IP/MPLS/GMPLS HmeLAN, Access/Aggregatin, Cre, inter-dmain Time/Prcess divisin Prvisining, Invcatin, OAM (assurance) 2 end-t-end layers One fr the sessin: EQ-SIP end-t-end signaling One fr the QS: RM-SSN end-t-end signaling 2 sub-layers End-t-end QS path cmputatin: qbgp Lcal QS cnfiguratin: RA Three levels integrated & synchrnised Applicatin Cntrl Transprt Wrkshp n End-t-End QE/QS

9 3 - End2end path vs. cmplexity f AS and BR cnnectivity BR41 AS1 BR44 AS4 BR61 AS6 BR43 BR42 BR62 CN T61 BR22 AS2 BR21 BR31 BR51 BR52 AS BGP Autnmus System - ruters BR32 AS3 BR53 AS5 BR ruters --- Best Effrt link --- QS link T AS path Wrkshp n End-t-End QE/QS

10 3 - EuQS End2end path cncept End2end path prvide a QS path between 2 Access Netwrk t reach a given prefix thrugh several backbne fr a given Class Of Service The end2end QS belng t a given CS Bandwidth f the end2end path Maximum delay, jitter, packet lss Must be setup by prvisining At layer 2: ATM VP, VLAN Or at Layer 3: MPLS-TE LSP, GRE tunnel, DiffServ Fr each type f netwrk Manually r autmatically The Invcatin Prcess Use EQ-Path The Prvisining Prcess Built EQ-Path The OAM Prcess Mnitr EQ-Path Cntrlled during Invcatin By Call Admissin Cntrl By apprpriate device cnfiguratin Mnitred by OAM Fault tlerance Measurement reprting/adjustment EuQS End2end Path Multi-dmain Per-dmain End2end PATH with stacking r merging Wrkshp n End-t-End QE/QS

11 3 - EuQS vs. PSTN mdel Trunk Ruting CS PSTN Resurces Prvisining Backup link PSTN Signaling Find the suitable trunk t reach the destinatin Reserve an IT fr this cnnectin Reject call if n trunk r full trunk Adjust Trunk capacity Traffic Matrix Invcatin Prvisining OAM Per CS EQ-path EuQS Based n BGP AS path fr the «lse mdel» Based n MPLS tunnel fr the «hard mdel» SIP Signaling Find suitable EQ-path fr the CS t reach the destinatin Reserve Bw inside this EQ-path Reject call if n EQ-path r n Bw Adjust EQ-path capacity By mnitring and measuring the EQ-path usage Wrkshp n End-t-End QE/QS

12 3 - End2end path regarding QS rute EuQS system must be aware f the QS capabilities alng the data path By means f enhanced versin f BGP r Traffic Engineering Enhanced versin f BGP guarantee an AS path inside a given CS fr delay, gigue & lst parameters There is a PhB cntinuity alng the AS path There is n bandwidth guarantee MPLS-TE guarantee an AS path tunnel inside a given CS fr bandwidth, delay, gigue & lst parameters There is n bandwidth guarantee inside the tunnel CAC must be perfrm in rder t Chse the apprpriate End2end path t meet the CS Perfrm bandwidth cntrl t prtect the QS end2end path Wrkshp n End-t-End QE/QS

3 EQ-Path setup prcedure RM1 Wifi EQ-BGP RM4 psls AS 65520 AS 65521 LAN EQ-BGP psls EQ-BGP Backbne AS

CS psls are prvisined in RM after peering negtiatin 2. RM establish EQ-BGP sessin 3.

13 3 EQ-Path setup prcedure RM1 Wifi EQ-BGP RM4 psls AS AS LAN EQ-BGP psls EQ-BGP Backbne AS EQ-BGP EQ-Path GEANT psls RM2 xdsl BRAS AS RM3 psls 1. CS psls are prvisined in RM after peering negtiatin 2. RM establish EQ-BGP sessin 3. RM negtiate QS NLRI thrugh EQ-BGP 4. RM cmpute and chse the best AS-path per CS 5. RM enfrce EQ-Path base n AS-path cmputatin and stacking mdel Wrkshp n End-t-End QE/QS

14 3 Lse mdel vs. Hard mdel e2e QS ruting EQ-BGP psls Plicy Management psls Plicy Management psls Plicy Management RM RM RM MPLS-TE Rute Enfrce RA EQ-BGP QS NLRI MPLS-TE Rute Enfrce RA EQ-BGP QS NLRI RA MPLS-TE Rute Enfrce QS dmain path QS interdmain path QS dmain path QS interdmain path QS dmain path Built End-t-end QS path Wrkshp n End-t-End QE/QS

15 3 EQ-BGP deplyment in Lse mdel Standard BGP sessins established with peering ruters are discnnect And replace by EQ-BGP sessins between peers RM Then we prvide ruting infrmatin t all brder ruters by means f ibgp EQ-BGP sessin RM EQ-BGP sessin ibgp BGP ibgp BGP ibgp Wrkshp n End-t-End QE/QS

16 3 EQ-BGP deplyment in hard mdel Multiple standard BGP sessins are established thrugh MPLS VPN (RFC 2547) One BGP sessin per Class f Service (CS) RM setup apprpriate BGP cnfiguratin inside each CS VPN LSP (nrmal r TE) are setup t carry traffic frm PE t the crrespnding CS VPN RM PE LSP cnf. LSP cnf. BGP CS VPN cnfiguratin BGP ASBR BGP sessins One per CS VPN PE Wrkshp n End-t-End QE/QS

17 EQ-SIP Signaling 4 - EuQS Architecture Applicatin Layer USER 1 EQ-SIP EQ-SIP USER 2 Applicatin prxy prxy Applicatin Applicatin QS-based e2e signaling EQ-SIP, EQ-SDP Virtual Netwrk Layer EQ-SIP Signaling EQ-SDP Netwrk technlgy Independent sub-layer EQ-NSIS EQ-NSIS EQ-NSIS EQ-NSIS EQ-NSIS EQ-SDP EQ Prtcls RM1 RMi RMj RMk RM2 n RA1 COPS Access Netwrk 1 Netwrk technlgy dependent sub-layer RAi COPS QS Dmain i COPS RAj QS Dmain EQ-BGP j EQ-MMS EQ-path COPS RAk QS Dmain k Wrkshp n End-t-End QE/QS COPS RAn Access Netwrk 2 EQ Prtcls

18 4 - EuQS cnnectin setup e2e QS request EQ-SIP QS Request QS Request QS Request RM RM RM QS Enfrce RA QS Enfrce RA QS Enfrce RA QS dmain path QS interdmain path QS dmain path QS interdmain path QS dmain path Use End-t-end QS path Wrkshp n End-t-End QE/QS

5 - EuQS Netwrk General Overview Flexible architecture with private BGP sessins Independent f GEANT BGP ruting A path can be established thrugh as many different ASs as required Extensible testbeds

19 5 - EuQS Netwrk General Overview Flexible architecture with private BGP sessins Independent f GEANT BGP ruting A path can be established thrugh as many different ASs as required Extensible testbeds pssible : addresses pls f /16 size with private addressing fr each partners Full meshed 131 GRE (BE) tunnels Wrkshp n End-t-End QE/QS 12 different testbeds cnnected via GEANT based in 10 different lcatins in 6 cuntries/nrns n 4 different access netwrks technlgies : XDSL LAN WiFi UMTS NRNS France : RENATER, Italy : GARR, Pland : PIONIER Prtugal : RCTS Spain : RED IRIS Switzerland : SWITCH

20 6 - Cnclusin EuQS system is based n End2end path cncept End2end path is efficient, reliable and scalable Efficient since the invcatin used them and nt built them Reliable since the OAM prcess mnitr the end2end path Scalable as they describe AS path and culd be merge End2end path culd be accmmdate t varius cnfiguratin and technlgy Bth "lse" and "hard" mdel are supprted End2end path culd be setup at Layer 2 r Layer 3 Over-prvisined netwrk are als supprted thrugh dummy end2end path EuQS system will be built prgressively Phase0: End2end path will be setup manually (dne) Phase1: End2end path will be setup with the lse mdel (dne) Phase2: End2end path will be setup with bth lse and hard mdel Wrkshp n End-t-End QE/QS

21 Internatinal Telecmmunicatin Unin Questins? Thank yu fr yur attentin Wrkshp n End-t-End QE/QS

Resource and Admission Control for NGN

Resource and Admission Control for NGN Internatinal Telecmmunicatin Unin Resurce and Admissin Cntrl fr NGN Hui-Lan Lu, Ph.D. Q.4/13 Rapprteur Bell Labs, Lucent Technlgies Geneva, 14-16 June 2006 802.xx Access xdsl Dmain 1 IntServ Why? N G N