Recently, there has been increasing interest in applying MPLS (Multi-Protocol Label Switching) to IP-based wireless access networks , During a handover on a Mobile MPLS-based network a registration update message is sent from the Foreign Agent (FA) to the Home Agent (HA) which results in a handover delay. There have been proposals for handover processing mechanisms over MPLS-based networks using micro-mobility to decrease the amount of signaling delay between the HA and the FA [1-4]. Unfortunately, network delays still occur when the demand on the network exceeds its capacity. This makes it difficult to guarantee QoS [5, 6]. In this paper we propose to isolate multimedia traffic from the other traffic flows as in Dynamic-Class Based Threshold (D-CBT) [7, 8]. Non-multimedia traffic will be forwarded to the Active Queue Management (AQM) system. We implemented load balancing on AQM for multimedia traffic. In this paper, we propose an approach that dynamically adjusts the threshold on multimedia traffic and Drop/Mark probability based on queue length, output rate, and media access delay on a micro-mobility on a MPLS-based network. Our simulation results show that our proposed technique provides maximum resource utilization, and decreases the number of packets dropped. In addition, our proposed method also yields lower average queue length.