Transmission control apparatus improved in transmission efficiency of downstream data

摘要

In a transmission control apparatus, connected communication devices are detected to find round trip time of transmission to each of the detected communication devices, and the order of each communication device is determined on the basis of the round trip time of transmission to that communication device depending upon the distance thereto. On the basis of the round trip times of transmission to, and the orders of, the communication devices, transmission wait times are determined for delaying transmission of control signals from the communication devices to notify the communication devices of the transmission wait times. When starting communication with the communication devices, timer start signals prompting the communication devices to start counting the transmission wait time are transmitted to the communication devices.

主权项

1. A transmission control apparatus responsive to a control signal transmitted to and received from a plurality of communication devices connectable to said apparatus for allocating a time division communication band to control transmission of the plurality of communication devices, comprising:
a discovery processor detecting the communication devices connected and determining round trip time of transmission to each of the detected communication devices; an order determiner using the round trip time of transmission to each of the communication devices for determining an order of each of the communication devices corresponding to a distance to the communication device to produce ordering information; a transmission wait time calculator using the round trip time of transmission to each of the communication devices and the ordering information for determining transmission wait time in which transmission of the control signal from each of the communication devices is to be delayed; a transmission wait time notifier notifying each of the communication devices of the transmission wait time for the communication device; and a measurement start signal transmitter transmitting at one time, when starting communication with each of the communication devices, a timer count start signal to the communication devices as a whole, the timer count start signal prompting the communication device to start counting the transmission wait time.