Abstract:

In the long term evolution(LTE) system, admission control is one of the most important techniques to guarantee the quality of service(QoS).The admission control algorithm with resource reservation is highly affected by the reservation threshold value,also it has a high handoff dropping rate.To deal with these disadvantages, an algorithm with dynamic resource reservation based on queuing in LTE is proposed.First, the algorithm reserves some resources through setting threshold value.After that the new call can use these resources directly while the handoff call must request for it . Whatever the request probability is newly defined in this paper.Then when the resources of the system are used up, in order to further reduce the handoff dropping rate, queuing for handoff calls waiting is used for the system own remaining resources.The simulation results show that the proposed algorithm can effectively reduce the handoff dropping rate, improve the utilization rate of system resources.Also the proposed algorithm is less affected by the reservation threshold value.