Abstract: A communication system in which a plurality of communication networks are interconnected, the communication system including a plurality of inter-communication network connections that include an inter-communication network connection by a first circuit performing communication by a first protocol and an inter-communication network connection by a second circuit performing communication by a second protocol, including: a route selection apparatus that is provided in a communication network that is connected to another communication network by the first circuit, and that is connected to another communication network by the second circuit; and an address resolution apparatus that can communicate with the route selection apparatus, wherein the route selection apparatus sends an inquiry to the address resolution apparatus about an address corresponding to an incoming number in a connection request signal transmitted from a user apparatus in the communication network so as to determine whether to transmit the conn

Abstract: A SIP control apparatus is provided. The SIP control apparatus is connected to a management apparatus controlling call processing policy in an IP network, and controls a voice call made by a user apparatus. The SIP control apparatus includes a determination unit configured to, in the case where a call connection request is received from the user apparatus, determine whether authentication of the user apparatus has been completed by querying the management apparatus; and a call processing unit configured to, in the case where it is determined that the authentication of the user apparatus has been completed, perform call connection processing without authenticating the user apparatus.

Abstract: The disclosure provides a mobile communication system, a communication control device, a mobility management entity, and a mobile communication method which can avoid a failure in making an emergency call via an IMS when a mobile station connects to a VPLMN. An HSS 100 judges whether or not an emergency call origination via an IMS 500 is supported in the VPLMN, and transmits a signal including an indicator, EM supported or EM not supported, which indicates whether or not the emergency call origination is supported, to an MME 300. The MME 300 receives the indicator from the HSS 100 and transmits, to the UE 20, Attach Accept responding to Attach Request to the VPLMN from a UE 20. Based on the indicator received from the HSS 100, the MME 300 transmits, to the UE 20, Attach Accept including the indicator which indicates whether or not the emergency call is supported.

Abstract: A communication system in which a plurality of communication networks are interconnected, the communication system including a plurality of inter-communication network connections that include an inter-communication network connection by a first circuit performing communication by a first protocol and an inter-communication network connection by a second circuit performing communication by a second protocol, including: a route selection apparatus that is provided in a communication network that is connected to another communication network by the first circuit, and that is connected to another communication network by the second circuit; and a connection determination apparatus that is provided in a first circuit connection network that is the other communication network connected with the communication network by the first circuit, wherein, when the route selection apparatus receives a connection request signal transmitted from a user apparatus in the communication network, the route selection apparatus tran

Abstract: A communication system in which a plurality of communication networks are interconnected, the communication system including a plurality of inter-communication network connections that include an inter-communication network connection by a first circuit performing communication by a first protocol and an inter-communication network connection by a second circuit performing communication by a second protocol, including: a route selection apparatus that is provided in a communication network that is connected to another communication network by the first circuit, and that is connected to another communication network by the second circuit; and an address resolution apparatus that can communicate with the route selection apparatus, wherein the route selection apparatus sends an inquiry to the address resolution apparatus about an address corresponding to an incoming number in a connection request signal transmitted from a user apparatus in the communication network so as to determine whether to transmit the conn

Abstract: A host providing system includes a physical host network switch which determines permission and non-permission of communication on the basis of whether or not information pieces indicating users correlated with information indicating a transmission source and information indicating a transmission destination included in communication data from a physical instance match each other, and controls the communication data on the basis of a determination result. Accordingly, since only communication between instances of the same user is permitted, and thus communication from a physical instance is appropriately controlled, it is possible to ensure security in the system.

Abstract: A host providing system includes a physical host managing node which controls one or more physical servers and can manage a usage state of a physical host formed in the physical server, and thus the physical server for forming a physical host can be controlled in the system. In addition, a single physical host managing node is selected depending on instance type information included in an instance starting request from a user terminal, and the instance starting request is sent to the selected physical host managing node. Accordingly, it is possible to provide a physical instance complying with a user's request as a physical host.

Abstract: A host providing system includes a physical host managing node which controls one or more physical servers and can manage a usage state of a physical host formed in the physical server, and thus the physical server for forming a physical host can be controlled in the system. In addition, a single physical host managing node is selected depending on instance type information included in an instance starting request from a user terminal, and the instance starting request is sent to the selected physical host managing node. Accordingly, it is possible to provide a physical instance complying with a user's request as a physical host.

Abstract: A host providing system includes a physical host network switch which determines permission and non-permission of communication on the basis of whether or not information pieces indicating users correlated with information indicating a transmission source and information indicating a transmission destination included in communication data from a physical instance match each other, and controls the communication data on the basis of a determination result. Accordingly, since only communication between instances of the same user is permitted, and thus communication from a physical instance is appropriately controlled, it is possible to ensure security in the system.