Data sharing system, transmitting terminal apparatus, transmitting terminal apparatus controlling method, receiving terminal apparatus, receiving terminal apparatus controlling method, and recording medium

A transmitting terminal apparatus for transmitting at least screen display data to at least one receiving terminal apparatus connected via a network, said transmitting terminal apparatus comprising:

• transfer rate setting means for setting a transfer rate based on how fast said display screen data were transferred previously to said receiving terminal apparatus;
• transfer rate determining means for calculating a predicted completion time of a data transfer based on a predetermined transfer rate, said transfer rate determining means further determining whether said data transfer is completed within said predicted completion time,
• wherein said transfer rate setting means changes said transfer rate if at least a predetermined number of results of the determination by said transfer rate determining means are consecutively equal;
• communication performance measuring means for measuring communication performance parameters representative of network communication performance between said transmitting terminal apparatus and said receiving terminal apparatus;
• evaluating means for calculating evaluation parameters for evaluating network communication status using at least said transfer rate and said communication performance parameters;
• and
• interlocking process controlling means for controlling an interlocking process between said transmitting terminal apparatus and said receiving terminal apparatus by use of said evaluation parameters.

A computer-readable medium for storing a program executed in a transmitting terminal apparatus for transmitting at least screen display data to at least one receiving terminal apparatus connected via a network, wherein the program comprises:

• a transfer rate setting step of setting a transfer rate based on how fast said display screen data were transferred previously to said receiving terminal apparatus;
• a transfer rate determining step of calculating a predicted completion time of a data transfer based on a predetermined transfer rate and determining whether said data transfer is completed within said predicted completion time;
• a transfer rate changing step of changing said transfer rate if at least a predetermined number of results of the determination in said transfer rate determining step are consecutively equal;
• a communication performance measuring step of measuring communication performance parameters representative of network communication performance between said transmitting terminal apparatus and said receiving terminal apparatus;
• a evaluating step of calculating evaluation parameters for evaluating network communication status using at least said transfer rate and said communication performance parameters;
• and
• a interlocking process controlling step of controlling an interlocking process between said transmitting terminal apparatus and said receiving terminal apparatus by use of said evaluation parameters.

A transmitting terminal apparatus controlling method for use by a transmitting terminal apparatus in a data sharing system having at least display screen data shared between at least said one transmitting terminal apparatus and at least one receiving terminal apparatus connected via a network, said transmitting terminal apparatus controlling method comprising the steps of:

• setting a transfer rate based on how fast said display screen data were transferred previously to said receiving terminal apparatus;
• calculating a predicted completion time of a data transfer based on a predetermined transfer rate;
• determining whether said data transfer is completed within said predicted completion time;
• changing said transfer rate if at least a predetermined number of results of the determination in said transfer rate determining step are consecutively equal;
• measuring communication performance parameters representative of network communication performance between said transmitting terminal apparatus and said receiving terminal apparatus;
• calculating evaluation parameters for evaluating network communication status using at least said transfer rate and said communication performance parameters;
• and
• controlling an interlocking process between said transmitting terminal apparatus and said receiving terminal apparatus by use of said evaluation parameters.