A mobile wireless communication control device that, in a mobile wireless communication system in which Voice over IP, VoIP, is used and wherein a wireless device equipped on a moving object, such as a train, which belongs to a first wireless zone and moves in a plurality of wireless zones (31, 32, 33, 34, 3N), performs communications with a VoIP terminal on a ground side via a base station, performs start control of said communications between the VoIP terminal and the wireless device, said mobile wireless communication control device comprising: means configured to receive a call start request from the wireless device, a moving object information holder configured to store a communication state of each moving object and information showing a wireless zone to which the moving object belongs; and a call admission determinator configured to refer to the information held by said moving object information holder, calculate a first sum of a number of calls of moving objects each of which belongs to the first wireless zone during a call and a number of calls of moving objects each of which moves from a second wireless zone to the first wireless zone during a call, the second wireless zone being adjacent to the first wireless zone, and determine that the communications is to be started, wherein starting the communications comprises transferring the call start request to the VoIP terminal, when the first sum is equal to or smaller than said first threshold, and a second sum of a number of calls of moving objects which move in the traveling direction of the moving object and which are in communication in the second wireless zone adjacent to said first wireless zone to which the moving object currently belongs, and a number of calls of moving objects which are moving from a third wireless zone to said second wireless zone, the third wireless zone being adjacent to the second wireless zone, and which are in communication is equal to or smaller than said first threshold, the second sum being calculated by said call admission determinator. means configured to receive a call start request from the wireless device, a moving object information holder configured to store a communication state of each moving object and information showing a wireless zone to which the moving object belongs; and a call admission determinator configured to refer to the information held by said moving object information holder, calculate a first sum of a number of calls of moving objects each of which belongs to the first wireless zone during a call and a number of calls of moving objects each of which moves from a second wireless zone to the first wireless zone during a call, the second wireless zone being adjacent to the first wireless zone, and determine that the communications is to be started, wherein starting the communications comprises transferring the call start request to the VoIP terminal, when the first sum is equal to or smaller than said first threshold, and a second sum of a number of calls of moving objects which move in the traveling direction of the moving object and which are in communication in the second wireless zone adjacent to said first wireless zone to which the moving object currently belongs, and a number of calls of moving objects which are moving from a third wireless zone to said second wireless zone, the third wireless zone being adjacent to the second wireless zone, and which are in communication is equal to or smaller than said first threshold, the second sum being calculated by said call admission determinator. calculate a first sum of a number of calls of moving objects each of which belongs to the first wireless zone during a call and a number of calls of moving objects each of which moves from a second wireless zone to the first wireless zone during a call, the second wireless zone being adjacent to the first wireless zone, and determine that the communications is to be started, wherein starting the communications comprises transferring the call start request to the VoIP terminal, when the first sum is equal to or smaller than said first threshold, and a second sum of a number of calls of moving objects which move in the traveling direction of the moving object and which are in communication in the second wireless zone adjacent to said first wireless zone to which the moving object currently belongs, and a number of calls of moving objects which are moving from a third wireless zone to said second wireless zone, the third wireless zone being adjacent to the second wireless zone, and which are in communication is equal to or smaller than said first threshold, the second sum being calculated by said call admission determinator.