Control apparatus, content transmission system and content transmission method

A control apparatus for accepting a request for transmission of content from a content transmission apparatus to the control apparatus, for passing on the request to the content transmission apparatus for transmitting the content to the control apparatus over a communication network allowing a transmission quality to be reserved, and for issuing a request to a content accounting server to carry out a content accounting process according to the requested content and content quality of the requested content, wherein the control apparatus:

• receives specified content and a specified payment amount for the content, determines an optimum content quality of the content as well as a transmission quality which are in a range determined by the payment amount, and transmits a request based on the specified content and the optimum content quality to the content transmission apparatus as the request for transmission of the content from the content transmission apparatus to the control apparatus;
• makes a reservation for the determined transmission quality of a transmission line between the content transmission apparatus and the control apparatus in conjunction with a transmission-quality reservation server, which is connected to the communication network, based on the transmission quality;
• and
• issues a request to a transmission-quality accounting server to carry out an accounting process for the reserved transmission quality,
• wherein the control apparatus also receives specified quality priority levels for one or more content qualities of the content, which is to be transmitted from the content transmission apparatus to the control apparatus, and a transmission quality for the content in addition to the specified content and the specified payment amount for the specified content and, based on the quality priority levels, determines values in a range determined by the payment amount as optimum values of the content qualities and the transmission quality, and
• when the user operates the control apparatus to change the specified payment amount used for finding the optimum values of the transmission quality and the content qualities, which serve as a basis for the request to the content transmission apparatus for transmission of the content from the content transmission apparatus to the control apparatus, to a new payment amount, the control apparatus:
• determines new values in a range determined by the new payment amount as new optimum content qualities of the content and a new transmission quality for the content and stops the transmission of the content at the former optimum content qualities determined by the specified payment amount before being changed from the content transmission apparatus to the control apparatus;
• retransmits a request to the content transmission apparatus as a request for retransmission of the content based on the specified title and the new optimum content qualities from the content transmission apparatus to the control apparatus;
• makes a reservation for the new transmission quality of the transmission line between the content transmission apparatus and the control apparatus in conjunction with the transmission-quality reservation server based on the new transmission quality;
• and
• issues a request to the transmission-quality accounting server as a request for execution of an accounting process for the reserved new transmission quality.

A content transmission system, the system comprising:

• a content transmission apparatus to transmit content requested by a content request originator to the content request originator over a communication network allowing a transmission quality to be reserved, and to issue a request to a content accounting server to carry out a content accounting process according to the title of and content quality of the requested content;
• and
• a call control server configured to (a) establish a session between the content request originator and the content transmission apparatus, (b) make a reservation for a transmission quality of a transmission line between the content transmission apparatus and the content request originator in conjunction with a transmission-quality reservation server, and (c) issue a request to a transmission-quality accounting server to carry out an accounting process according to a transmission quality for the reserved transmission quality,
• wherein the call control server:
• calculates content and transmission qualities in a range determined for a payment amount specified by the content request originator as respectively an optimum content quality of the content, which has been requested by the content request originator as a content to be transmitted from the content transmission apparatus to the content request originator, based on a transmission-band reservation cost per unit transmission rate, a transmission-band reservation rate, a content cost per unit transmission rate, and a content transmission rate, and a transmission quality for the content based on the content title specified by the content request originator and the payment amount also specified by the content request originator,
• makes a reservation for a transmission quality of the transmission line based on the calculated transmission quality, and
• issues a request to the transmission-quality accounting server as a request for execution of an accounting process for the reserved transmission quality.

A content transmission method for transmitting content requested by a content request originator to the content request originator over a communication network allowing a transmission quality to be reserved from a content transmission apparatus that is also used for issuing a request to a content accounting server to carry out a content accounting process according to the title of and content quality of the requested content, the content transmission method comprising the steps of:

• calculating, using a control apparatus operated by the content request originator to specify the title of the requested content and a payment amount for the requested content, content and transmission qualities in a range determined for the payment amount specified by the content request originator as respectively an optimum content quality of the content, which has been requested by the content request originator as a content to be transmitted from the content transmission apparatus to the content request originator, based on a transmission-band reservation cost per unit transmission rate, a transmission-band reservation rate, a content cost per unit transmission rate, and a content transmission rate, and a transmission quality for the content based on the content title specified by the content request originator and the specified payment amount;
• issuing, using the control apparatus, a request based on the specified title and the calculated optimum content quality to the content transmission apparatus for transmission of the requested content from the content transmission apparatus to the control apparatus;
• making, using the control apparatus, a reservation for the calculated transmission quality of a transmission line between the content transmission apparatus and the control apparatus in conjunction with a transmission-quality reservation server, which is connected to the communication network, based on the calculated transmission quality;
• and
• issuing, using the control apparatus, a request to the transmission-quality accounting server for execution of an accounting process for the reserved transmission quality.