Simulation-based examination of MPLS/RSVP-TE-based Radio Access Networks. Technical University of Ilmenau (Germany) Chair for Integrated HW/SW Systems

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1 Name: Faculty: Electrical Engineering Information and Communication Technology Simulationbased examination of /RSVPTEbased Radio Access Networks Technical University of Ilmenau (Germany) Chair for Integrated HW/SW Systems Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 1 Objectives ATM RNC ATM SGSN GGSN Topology? Pure or? AP RNC SGSN GGSN General requirements QoS requirements Simulation environment Simulation studies Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 2

2 RAN Evolution RAN UE UE RNC RAN SGSN Server GGSN PS CN PS CN External Network UE Distributed RAN (Lucent Technologies) UE i RNC RAN RAN Server SGSN Server GGSN PS CN External Network UE UE i i CN Edge Router SGSN Server GGSN External Network i Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 3 in the UTRAN Voice services low jitter and low delay Data services low loss Receiving Window of approximately 20 ms at the inode B in regard to voice traffic Loss should be predictable and is used to calculate the maximum number of users The overhead should be small, especially for voice packets The requirements depend on the approach for the future UTRAN Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 4

3 MultiProtocol Label Switching Between Data Link Layer and Network Layer Short labels of fixed length header processing only at the boundary of the cloud Traffic on fixed paths Label Switched Path (LSP) FTN Label Information Base Label Information Base Label Information Base address FEC IIF IL OIF OL IIF IL OIF OL IIF IL OIF OL LER LSR LSR Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 5 RSVPTE Extension to RSVP for LSP tunnels PATH message RESV message Level 1 Label distribution protocol for Traffic engineering capabilities Flexible message model Soft state protocol Access Router Access Nodes Access Nodes Access Nodes Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 6

4 Traffic Engineering Capabilities explicitly routed LSPs to prescribe a path for an LSP resource affinities to exclude links by using specific parameters a link has to match route recording to collect information of the taken route route pinning to bind an LSP to its path, even if it was not explicitly routed resource reservation to reserve resources for an LSP, like bandwidth, which are not usable for other LSPs priorities to allow preemption within setup processes and suppression in the case of existing LSPs alternative LSPs to establish backup LSPs, unused under normal conditions restoration to repair the LSPs automatically, if a failure occurs Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 7 Topology and Traffic Model Voice user (AMR codec) 3 states (12.2kbps; 4.75kbps; 2.5kbps) Transmission Time interval 20 ms SGSN Level 1 Data user UDP source Constant bit rate 1500 byte packets Access Router 1 data LSP and 1 voice LSP per i i i i Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 8

5 Scenarios (1) Multipath 3x34 3x34 Mbps Mbps => => Mbps Mbps + x distance vector routing with multipath capabilities /RSVPTE constraintbased routing Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 9 Scenarios (2) 4 different traffic mixes Mixes Voice LSP Data LSP Voice user Data user 400/ user 1580 kbps 800/ user 1180 kbps 1200/ user 780 kbps 1600/ user 380 kbps 400/ kbps 1580 kbps 40 user 1580 kbps 800/ kbps 1180 kbps 78 user 1180 kbps 1200/ kbps 780 kbps 113 user 780 kbps 1600/ kbps 380 kbps 151 user 380 kbps Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 10

6 Scenarios (3) 3 distributions of is unevenly distributed traffic distribution approx. loss () 50/50/50 ~ 0 % 102 Mbps ~ 7 % ~ 13 % 51 x 2 Mbps Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 11 Delay 400/1580 (40 voice users) (one traffic mix as an example) 30,000 25,000 25,121 25,083 24,956 mean delay [ms] 20,000 15,000 10,000 (voice) (data) Multipath (voice) Multipath (data) 5,000 4,921 4,927 4,937 4,367 4,685 4,530 4,824 4,551 4,866 0,000 50/50/50 distribution access nodes Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 12

7 Loss 400/1580 (40 voice users) 20,000 18,000 16,000 17,670 14,000 mean loss [%] 12,000 10,000 8,000 8,024 9,996 (voice) (data) Multpath (voice) Multipath (data) 6,000 4,000 2,000 0,000 3,959 1,612 0,708 0,708 0,313 0,032 0,312 0,015 0,312 50/50/50 distribution access nodes Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 13 Impact of Traffic Variation Multipath scenario 300,0 250,0 20,000 18,000 17,670 change [%] 200,0 150,0 mean loss [%] 16,000 14,000 12,000 10,000 8,000 6,000 4,000 8,024 3,959 9,996 (voice) (data) Multpath (voice) Multipath (data) voice mean delay voice mean jitter voice mean loss data mean delay data mean jitter data mean loss 100,0 2,000 0,000 1,612 0,708 0,708 0,313 0,312 0,312 0,032 0,015 50/50/50 distribution access nodes 50,0 50/50/50 > > 50/50/50 > > 50/50/50 > > 50/50/50 > > 400/ / / /380 Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 14

8 Impact of Traffic Variation scenario change [%] 300,0 250,0 200,0 150,0 voice mean delay voice mean jitter voice mean loss data mean delay data mean jitter data mean loss 100,0 50,0 50/50/50 > > 50/50/50 > > 50/50/50 > > 50/50/50 > > 400/ / / /380 Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 15 Conclusion scenario better performance by evenly distributed traffic large variation of the values if the traffic distribution changes maximum number of users has to be changed scenario stable delay, jitter and loss values within changing processes same maximum number of users a couple of further traffic engineering capabilities and RSVPTE is a good solution to replace ATM in the transport network of future UTRANs Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 16

9 Thanks for your attention! Chair for Integrated HW/SW Systems TU Ilmenau Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 17 transport mode App TCP e.g., PPP Wireless UTRAN Transport Transport Mode CN Transport Mode Radio Network Layer Radio Network Layer GTP GTP GTP GTP FP FP PHY PHY Uu Iub Iu MS AP RNC SGSN GGSN Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 18

10 native mode Wireless UTRAN Transport CN App TCP e.g., PPP Transport Mode Native Mode Radio Network Layer Radio Network Layer GTP GTP FP FP PHY PHY Uu Iub MS AP RNC Iu IGSN Border Router Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 19 General of a UTRAN Avoidance of congestion Optimization of utilization Flow identification Support of different QoS classes Support of handover and mobility Error control Buffer management Header compression Minimization of link and element costs Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 20

11 Receiving Window Received at Early OK Late Too Late Receiving Window tproc ToAWS ToAWE LToA Positive ToA Negative ToA Air interface N 3 N 2 N 1 N Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 21 Work Flow of Implementation MNS version 2.0 for ns2.1b8 Adaptation installation to ns2.1b9 Integration of MNS2.0 in NS evironment NSallinone2.1b9a deletion of MNS verion 1.0 RSVP code for ns 2.1b8 Adaptation of the basic structure Implementation of missing objects and new procedures (RSVPTE specification) Interface description Definition of interfaces to M.0 Integration of RSVP TE in MNS and NS NS2.1b9 with M.0 and RSVPTE as Distribution Protocol Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 22

12 Measurement Model (delay) voice user 1 Delay of packets voice user 2 Delay of packets delay delay delay resulting values delay of voice traffic delay of Data traffic delay data user Delay of packets delay delay of data traffic delay delay of data traffic Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 23 Architecture of MNS2 Routing Protocol Address Classifier Resource Manager RSVPTE Admission Control Link RSVPTE messages Information flooding Packets in Classifier Service Classifier Packet Scheduler Packets out Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 24

13 Jitter 400/1580 (40 voice users) 0,400 0,350 0,300 0,340 0,339 0,336 0,294 0,299 0,304 0,267 mean jitter [ms] 0,250 0,200 0,150 0,246 0,243 0,205 0,200 0,188 (voice) (data) Multipath (voice) Multipath (data) 0,100 0,050 0,000 50/50/50 distribution access nodes Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 25 Statistical Values Measurement interval: 7 s 65 s Duration: 75 hours mean Standard deviation Onesided Confidence interval (99%) Delay Jitter Loss Delay Jitter Loss Through put voice data Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 26

14 Statistical Values Measurement interval: 7 s 65 s Duration: 75 hours Delay Jitter Loss Delay mean Standard deviation Onesided Confidence interval (99%) Jitter Loss Through put voice E E data E Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 27 Deviation of Measured Values Deviation of the measured values (7 s 15 s) from the mean values of a longer measurement interval (7 s 65 s) Traffic mix: 400/1580; 40 voice users Delay Jitter Loss throughput voice 0.0% 0.0% 100.4% data 0.0% 0.0% 0.3% voice 1.4% 0.3% 19.4% 0.4% data 0.1% 0.7% 14.6% 2.9% Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 28

15 Loss 400/1580 (40 voice users) 20,000 18,000 16,000 14,000 17,670 mean loss [%] 12,000 10,000 8,000 8,024 9,996 (voice) (data) Multpath (voice) Multipath (data) 6,000 4,000 2,000 0,000 3,959 1,612 0,708 0,708 0,313 0,032 0,312 0,015 0,312 50/50/50 distribution access nodes Dagstuhl, Simulationbased examination of /RSVPTEbased Radio Access Networks 29