Patent ID: 8116778
Filing Date: 2012-02-14
Classification: H04W

Abstract:
1. A method for controlling a plurality of transmitters, at least one of which transmits packets to a receiver, said controlling being made by sending at least one message to said at least one of said plurality of transmitters from a controller, said method comprising the steps of: determining reliability of said message; and sending said message to a target transmitter with the determined reliability; wherein the step of determination is a first determination step of setting to a deactivation scheduling grant message reliability higher than reliability set to an activation scheduling grant message or a second determination step of setting to a rate-decrease scheduling grant message reliability higher than reliability set to a rate-increase scheduling grant message, and wherein if the step of determination is the first determination step, then said method further comprises the steps of: causing the step of sending said message in order to send a deactivation scheduling grant message directed to a first target transmitter from said controller; said first target transmitter receives said deactivation scheduling grant message; said first target transmitter sends a scheduling grant confirmation message to said controller after receiving said deactivation scheduling grant message; said first target transmitter halts transmitting packets when a first period elapses after receiving said deactivation scheduling grant message; said controller receives said scheduling grant confirmation message; causing the step of sending said message in order to send an activation scheduling grant message directed to a second target transmitter from said controller after said controller receives said scheduling grant confirmation message; said second target transmitter receives said activation scheduling grant message; and said second target transmitter starts to transmit packets when a second period elapses after receiving said activation scheduling grant message.