 by HCCA. These two channel access functions are managed by a centralized controller called Hybrid Coordinator (HC), which is a module in the QoS Access Point (QAP). The IEEE 802.11e EDCA is a contention-based medium access method, and is realized with the introduc- tion of traffic categories (TCs). The EDCA provides differentiated distributed accesses to the wireless medium with eight access priorities from stations. The EDCA defines the access category (AC) mechanism that provides support for the priorities at the stations. Each station may have up to four ACs (AC_VO, AC_VI, AC_BE, and AC_BK) to support eight user priorities. One or more user priorities are assigned to one AC. Even though EDCA provides differentiated access categories, it does not guarantee the QoS parameters of hard real-time applications, i.e., jitter and delay [17]. In order to provide real-time services with guaranteed QoS- parameters, HCCA that has been designed for parameterized QoS support with a contention-free polling-based channel access mechanism must be used. The QAP scheduler computes the duration of polled-transmission opportunity (TXOP) for each QSTA based upon the TSPEC parameters of an applica- tion flow. The scheduler in each QSTA then allocates the TXOP for different TS queues according to the priority order. In IEEE 802.11e, traffic specifi- cation (TSPEC) is used to describe the traffic characteristics and the QoS requirements of a traffic stream (TS) to and from a station. In practical QoS-guaranteed multimedia service provisioning on IEEE 802.11e WLAN, there are two problems yet to be solved: (1) IEEE 802.11e WLAN access point (AP) node and network interface card that supports both EDCA and HCCA are not commercially available, (2) the IEEE 802.11e WLAN access point (AP) is limited and does not provide the Q-SIP/SDP session layer signaling and RSVP-TE network layer signaling. So, we have to use the Q-CNM that can manage the resource utilization in WLAN and interacts with SIP proxy server. Similar to the networking scenario