| 摘要 |
PURPOSE:To raise utilizing efficiency of a channel and to prevent an overhead time due to acquisition and release of the channel, by always monitoring a utilizing state of common transmission line, and executing the acquisition and release of the channel in accordance with its state. CONSTITUTION:In case whan a utilization factor of a channel is comparatively low, the number of channels is sufficient, therefore, as soon as a link is set, acquisition of a channel is executed, and until the link is released, the channel is not released. In this way, the overhead is reduced and the response is improved. Subsequently, when a utilizing state of the channel becomes considerably dense, each communication node device acquires the channel only when transmitting a data, in order to use in common the channel effectively, and releases the chennel in other time. In this way, the transmission line throughput is improved, and the response time is improved. |
