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This paper studies and develops efficient traffic management techniques at the base station of future multi-service IP-based network. The proposed scheduler does not only consider the delay requirements of each traffic class in a static manner, but also the instant delay margin of each packet. This is due to the fact that the instant delay margin is significantly more meaningful than the delay requirement because it can quantify how urgent the packet is, and thus can timely and exactly determine the queuing priority that should be given to the packet. Besides, a novel queue architecture which allows the integration of delay margin based scheduling and user channel based scheduling is proposed. Queue length and packet delay survivor functions of proposed algorithms are studied by simulations in a typical wireless access network.