Communication control program, content delivery program, terminal, and content server

A content delivery program which is executed by a computer and makes said computer perform a process for delivering content to a terminal in response to a request by the terminal for acquisition of the content, said process comprises the steps of:

• (a) preparing and storing quality-management information indicating correspondences between bandwidths and quality levels of said content;
• (b) determining a quality level of said content to be delivered to said terminal by referring to said quality-management information when bandwidth data indicating a bandwidth of a network to which the terminal is connected is received;
• (c) generating said content at said quality level determined in step (b);
• and
• (d) transmitting said content generated in step (c) to said terminal.

A terminal for performing communication through a plurality of network interfaces, comprising:

• said plurality of network interfaces which can be connected to a plurality of networks;
• an available-interface detection unit which detects at least one of said plurality of network interfaces which is currently available for communication;
• a network-interface selection unit which determines a network interface having a highest priority among said at least one of the plurality of network interfaces by referring to an interface information table in which numerical values related to a predetermined attribute of the plurality of network interfaces are set, and recognizing at least one priority of said at least one of the plurality of network interfaces based on the numerical values;
• and
• a data communication unit which performs data communication through said network interface determined by said network-interface selection unit.

A content server for delivering content to a terminal in response to a request by the terminal for acquisition of the content, comprising:

• a quality determination unit which stores in advance quality-management information indicating correspondences between bandwidths and quality levels of said content, and determines a quality level of said content to be delivered to said terminal by referring to said quality-management information when bandwidth data indicating a bandwidth of a network to which the terminal is connected is received;
• a content generation unit which generates said content at said quality level determined by said quality determination unit;
• and
• a content transmission unit which transmits to said terminal said content generated by said content generation unit.

A communication control method for performing communication in a terminal having a plurality of network interfaces, comprising the steps of:

• (a) detecting at least one of said plurality of network interfaces which is currently available for communication;
• (b) determining a network interface having a highest priority among said at least one of the plurality of network interfaces by referring to an interface information table in which numerical values related to a predetermined attribute of the plurality of network interfaces are set, and recognizing at least one priority of said at least one of the plurality of network interfaces based on the numerical values;
• and
• (c) performing data communication through said network interface determined in step (b).

A content delivery method for delivering content to a terminal in response to a request by the terminal for acquisition of the content, comprising the steps of:

• (a) preparing and storing quality-management information indicating correspondences between bandwidths and quality levels of said content;
• (b) determining a quality level of said content to be delivered to said terminal by referring to said quality-management information when bandwidth data indicating a bandwidth of a network to which the terminal is connected is received;
• (c) generating said content at said quality level determined in step (b);
• and
• (d) transmitting said content generated in step (c) to said terminal.