Patent ID: 8010110

Claim:
A mobile communication system comprising: a plurality of base stations that constitute a plurality of cells as communication ranges; a radio network controller that controls communication of mobile terminals in the cells; and a maintenance terminal that registers adjacent cell information in the radio network controller, the adjacent cell information including identification information of a handover original cell and identification information of adjacent cells adjacent to the handover original cell in the movement of the mobile terminals, wherein the radio network controller comprises: an adjacent cell information storage unit that stores the adjacent cell information; an adjacent cell information communication unit that transmits the adjacent cell information to the mobile terminals in the cells; and a detected cell information reception unit that receives detected cell information including the identification information of the handover original cell and identification information of a cell as an expected movement destination from a mobile terminal determining that a relationship between the identification information of the handover original cell and the identification information of the cell as the detected expected movement destination is not included in a relationship between the identification information of the handover original cell and the identification information of the adjacent cells recorded in the adjacent cell information, and wherein the maintenance terminal comprises: a detected cell information collection unit that collects the detected cell information from the radio network controller; a detection count record unit that records the number of detection times that the relationship between the identification information of the handover original cell and the identification information of the cell as the detected expected movement destination is determined as not included in the relationship between the identification information of the handover original cell and the identification information of the adjacent cells recorded in the adjacent cell information, based on the collection of the detected cell information; and an adjacent cell information additional-registration unit that additionally registers the relationship between the identification information of the handover original cell and the identification information of the adjacent cells corresponding to the number of detection times in the adjacent cell information, when the number of detection times exceeds a threshold value.