In MPLS (MultiProtocol Label Switching) networks

the exact traffic characteristic parameters can not be obtained and the traffic characters of the single flow and aggregated flows are different. There may be variances between the allocated network resource and practically used network resource in MPLS network. That may result in lower network resource utilization if only the available bandwidth given by control plane are considered in network resource and admission control. Focusing on this problem

a new admission control algorithm is put forward in which the available bandwidths are obtained by theoretic parameters combined with controlled end to end measurement results. An experimental environment is constructed and some admission control experiments are performed. The experimental results show that 〖JP3〗with the proposed algorithm

the admission ratio of the traffic with lower priority can be improved

the QoS can be guaranteed to some extent

and the network resource can be utilized more efficiently at the same time.