Communication system using communication network and communication method

Abstract

A communication system for guaranteeing only one each of two processing operations, correlated with each other and executed on different devices. A server has a unit which, on receipt of a first processing request, with identification information, executes this processing only once for one item of the identification, and a unit for transmitting a first processing completion notice to the transmission source of the processing request on completion of the first processing or on re-receipt of the processing request for the first processing with the same identification of the completed first processing. The client has a server, a unit for transmitting the processing request for first processing with identification information, a unit for executing a second processing, previously correlated with the first processing, on receipt of the completion notice, and a unit for re-transmitting a processing request on detection of an error before receipt of a transmitted completion notice.

1 . A client device for validating invalidated contents by concerted processing with the processing by a server device, comprising:
 processing request transmitting means for transmitting a processing request for billing processing, afforded with the identification information, to said server device;   validation processing executing means which, on receipt of a completion notice of said billing processing from said server device, validates the invalidated contents; and   re-transmitting means which, if a communication error has been detected before receipt of a completion notice for said processing request transmitted by said processing request transmitting means, re-transmits said processing request to said server device.   
     
     
         2 . A portable telephone set for validating invalidated contents by concerted processing with the processing by a server device, comprising:
 processing request transmitting means for transmitting a processing request for billing processing, afforded with the identification information, to said server device;   validation processing executing means which, on receipt of a completion notice of said billing processing from said server device, validates the invalidated contents; and   re-transmitting means which, if a communication error has been detected before receipt of a completion notice for said processing request transmitted by said processing request transmitting means, re-transmits said processing request to said server device.   
     
     
         3 . A program for allowing to perform a concerted processing between a first computer and a second computer interconnected over a network, said program being such a one in which
 said first computer transmits a processing request for a first processing, afforded with the identification information, to said second computer;   said second computer on receipt of said processing request executes said first processing only once for one item of the identification information, said second computer transmitting a completion notice of said first processing to said first computer on completion of said first processing or on re-receipt of said processing request for said first processing afforded with the same identification information as that conferred to the completed first processing; and   on receipt of said completion notice from said second computer, said first computer executes the second processing correlated in advance with said first processing; said first computer re-transmitting said processing request to said second computer on detection of a communication error before receipt of said completion notice.   
     
     
         4 . A program for allowing to perform concerted processing by a computer with another device connected thereto over a network, said program being such a one in which
 said computer on receipt of a processing request for a first processing, afforded with the identification information, executes said first processing only once for one item of said identification information, and in which   said computer on completion of said first processing or on re-receipt of said processing request for said first processing, afforded with the same identification information as that conferred to the completed first processing, transmits a completion notice of said first processing to the source of transmission of said processing request.   
     
     
         5 . A program for surrogating the billing of the cost of a payable content by a computer, said program being such a one in which
 said computer on receipt of a processing request for billing processing for the cost of said contents, afforded with the identification information, executes said billing processing only once for one item of said identification information, and in which   said computer on completion of said billing processing or on re-receipt of said processing request for said billing processing, afforded with the same identification information as that conferred to the completed billing processing, transmits a completion notice of said billing processing to said source of transmission of said processing request.   
     
     
         6 . A program for allowing to perform concerted processing by a computer with a server device connected thereto over a network, said program being such a one in which
 said computer transmits to said server device a processing request for said first processing, afforded with the identification information, and in which   on receipt of a completion notice of said first processing from said server device, said computer executes second processing correlated in advance with said first processing, said computer re-transmitting said processing request to said server device if a communication error is detected before receipt of said completion notice.   
     
     
         7 . A program for allowing to perform the processing by a computer of validating invalidated contents in a concerted fashion with processing by a server device, said program being such a one in which
 said computer transmits a processing request for billing processing, afforded with the identification information, to said server device; and in which   on receipt of a completion notice of said billing processing from said server device, said computer executes the processing of validating the invalidated contents; said computer re-transmitting said processing request to said server device if a communication error is detected before receipt of said completion notice.