r signaling, such as MPLS with RSVP-TE, and traffic engineering with TE-LSPs. The access loop, such as vDSL, is also not a critical bottleneck, since most wired access loop tech- nologies are expected to provide more than 25 Mbps without a big problem. The QoS-aware real-time service provisioning in Fast/Gigabit Ethernet can be easily configured by priority-based scheduling and differentiated queuing at each port. From these experiments, we found that the QoS-aware connectivity pro- visioning in WLAN is the most critical factor in the near future end-to-end QoS-guaranteed real-time service provisioning in broadband convergence net- work with heterogeneous networking technologies. Even in the IEEE 802.11 g C 2009 by Taylor & Francis Group, LLC Q-SIP/SDP for Converged Heterogeneous Wired and Wireless Networks 371 WLAN where the maximum physical layer transmission rate is 54 Mbps, the practical limitation of QoS-aware service provisioning with IEEE 802.11e EDCA mechanism is around 22 Mbps at IP packet layer. In order to provide QoS-guaranteed multimedia service provisioning in IEEE 802.11e WLAN, the HCCA/DLS scheme must be implemented. Another key factor in QoS-guaranteed real-time multimedia service pro- visioning is the end-to-end session layer Q-SIP/SDP signaling with tight cooperation with the network-layer signaling and the resource management function with CAC, in each subnetwork. In this paper, we proposed the func- tional architecture of this tight collaboration between the session-layer and the network-layer. As future work, we are developing the IEEE 802.11e dis- tributed CAC scheme and channel allocation algorithm to optimize the WLAN and Fast/Gigabit Ethernet resource utilization, while providing the end-to- end QoS provisioning according to the user's request. References [1] Kim, Y.-T., Y.-C. Jung, and S.-W. Kim. 2007. QoS-guaranteed realtime multimedia service provisioning on broadband conver- gence network (BcN) with IEEE 802.11e Wireless LAN and Fast/ Gigabit Ethernet, Journal of Communications and N