ly a single AS domain network with six IP/MPLS routers, as shown in Figure 15.8. In total eight end terminal nodes © 2009 by Taylor & Francis Group, LLC SIP Handbook: Services, Technologies, and Security To/from To/from Q-SIP/SDP Q- SIP/SDP Q-SIP/SDP user agent Proxy server user agent or proxy Parlay/OSA API or proxy (Connectivity management) Per-class-type Network QoS-virtual overlay network DiffServ-over-MPLS (PE router. CAC, AS domain network management TE-connectivity) (IP/MPLS router,links, link system state DB, CSPF routing) (NMS) NMS-EMS Interactions Element management (XML/SOAP) system (EMS) DiffServ-over-MPLS DiffServ-over-MPLS DiffServ-over-MPLS area network area network Area Network (IP/MPLS router, (IP/MPLS router, (IP/MPLS Router, Links) Links) Links) XML/SOAP XML/SOAP, CLI, SNMP XML/SOAP, CLI, SNMP CLI, SNMP Area 1 Area 3 Edge-to-Edge Area 2 QoS-guaranteed TE-LSP AS (Autonomous system) domain network or transit network FIGURE 15.11 Configurations for QoS-guaranteed service provisioning on IP/MPLS transit network. are generating real-time multimedia traffic (as QoS-required traffic) and best effort traffic. The aggregate traffic load increases continuously and is evenly distributed among eight stations. In the same way as in previous scenarios, four stations are assigned for each category. We configured two MPLS TE- LSPs for AC_VI and AC_BE with allocated bandwidth limits of 60 Mbps each. The TE-LSP for AC_VI is configured with higher priority than AC_BE. 15.4.3 Performance Analysis of End-to-End QoS Provisioning Figure 15.12 depicts the end-to-end performance analysis of QoS-provisioning on the testbed network with IEEE 802.11e WLAN, IP/MPLS transit network, and Fast/Gigabit Ethernet. The end-to-end real-time application is a video conference with H.323 video coding at 10 frames per second, 320 X 240 pixels display size, and the target average data rate of 384 Kbps at IP-layer. In order to compare the end-to-end quality of video conference according to the service provisioning scenario, we measured 