Aiming to the problem of interference management and resource allocation for mobile users in an ultra-dense network

a User Path based Resource Reservation（UPRR）algorithm is proposed in this paper.The scheme firstly takes the shortest path from the starting point to the end point as the metric to select an optimal path.In the selection process of the optimal path

this paper considers the condition that whether the blocks permit users pass through or not.Next the algorithm of resource reservation and resource reuse based on the optimal path is put forward

which firstly designs the steps of resource allocation and reservation

and then computes the resource reuse for all users in order to improve the utilization of spectrum resources.The simulation results show that the proposed algorithm can reduce the interference in the Femtocell Base Station（FBS）and improve the system performance on the basis of guaranteeing the low outage probability for mobile users.