| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable retransmission control of video frames between a terminal device and the other terminal device even in the case that the terminal device is connected to a communication network not supporting a video frame retransmission request method supported by the terminal device. <P>SOLUTION: A retransmission request transmission protocol converter has: conversion determination means, when receiving a retransmission request message from the terminal device or the communication network, determining whether or not the retransmission request message is based on a video frame retransmission request protocol supported by the transmission destination of the retransmission request message; and conversion transmission means, when it is determined that the retransmission request message is not supported, converting the video frame retransmission request message into a video frame retransmission request message based on a video frame retransmission request protocol supported by the transmission destination, and transmitting the video frame retransmission request message. <P>COPYRIGHT: (C)2012,JPO&INPIT |
