Abstract: In order to make it possible to suppress increase in the cost of message retransmission, this message delivery device delivers a message, stores a history relating to the success or failure of the delivery to each of destinations of the message in a history storage unit, when the delivery of the message has failed, determines on the basis of the history whether to perform retransmission of the message, and when determining to perform the retransmission, performs the retransmission of the message.

Abstract: In order to make it possible to suppress increase in the cost of message retransmission, this message delivery device delivers a message, stores a history relating to the success or failure of the delivery to each of destinations of the message in a history storage unit, when the delivery of the message has failed, determines on the basis of the history whether to perform retransmission of the message, and when determining to perform the retransmission, performs the retransmission of the message.

Abstract: A terminal, a message distribution system, a message distribution method, and a message distribution program are provided, which are capable of reliably delivering a push message to the terminal from a push server, regardless of a type of network utilized by the terminal, while reducing a processing load of the push server.

Abstract: Provided are a delivery device, a communication system, a load balancing method, and a load balancing program that enable processing loads for maintaining connections with terminals to be balanced over time, and enable the real time property of message delivery to be maintained for an event notification service.

Abstract: Provided are a delivery device, a communication system, a load balancing method, and a load balancing program that enable processing loads for maintaining connections with terminals to be balanced over time, and enable the real time property of message delivery to be maintained for an event notification service.

Abstract: A terminal, a message distribution system, a message distribution method, and a message distribution program are provided, which are capable of reliably delivering a push message to the terminal from a push server, regardless of a type of network utilized by the terminal, while reducing a processing load of the push server.

Abstract: An image sharing system includes: a server apparatus; first and second client apparatuses, which are communicably connected with the server apparatus; first and second telephone terminals associated with the first and second client apparatuses respectively; a connection control apparatus for controlling the connection between the first telephone terminal and the second telephone terminal; and a communication terminal including a camera part for photographing a subject, and an image sending part for sending image data representing the image outputted from the camera part, wherein the server apparatus includes a share-image sending part for sending an image represented by image data sent from the communication terminal as a share image to both the first and the second client apparatuses when the first telephone terminal is connected with the second telephone terminal, and both the first and the second client apparatuses include a share-image display part for displaying the share image.

Abstract: An image sharing system includes: a server apparatus; first and second client apparatuses, which are communicably connected with the server apparatus; first and second telephone terminals associated with the first and second client apparatuses respectively; a connection control apparatus for controlling the connection between the first telephone terminal and the second telephone terminal; and a communication terminal including a camera part for photographing a subject, and an image sending part for sending image data representing the image outputted from the camera part, wherein the server apparatus includes a share-image sending part for sending an image represented by image data sent from the communication terminal as a share image to both the first and the second client apparatuses when the first telephone terminal is connected with the second telephone terminal, and both the first and the second client apparatuses include a share-image display part for displaying the share image.