Patent ID: 7957334
Filing Date: 2011-06-07
Classification: H04L,H04W,Y02D

Abstract:
1. A communication system for transmitting packet data from a transmitter terminal to a destination terminal through at least one of a plurality of repeater terminals, comprising: a first transmitting means for transmitting the packet data from the transmitter terminal toward the destination terminal; a receiving means for receiving a response signal that is for the packet data transmitted by the first transmitting means and is transmitted from the destination terminal; and a second transmitting means for transmitting a control signal including information for the transmitter terminal and the destination terminal and information for the packet data depending on presence or absence and type of the response signal; wherein the first transmitting means further includes a means for repeating the packet data after sending the control signal from the second transmitting means; the destination terminal includes a third transmitting means for sending a response signal to the transmitter terminal in response to the packet data transmitted from the first transmitting means; the plurality of repeater terminals each comprises: a first repeating means for receiving the packet data and sending the packet data to the destination terminal or one or more of the plurality of repeater terminals, and a second repeating means for sending the response signal received by the receiving means to the transmitter terminal or one or more of the plurality of repeater terminals, and a determining means for determining its contribution numerically based on a number of repeating times of the packet data repeated by the respective first repeating means and number of repeating times of the response signal repeated by the respective second repeating means; each of the plurality of repeater terminals enters into a repeating mode for continuously sending the packet data when the determining means determines that the respective contribution is high, or a numeric value for the contribution reaches a predetermined threshold or higher; and each of the repeater terminals enters into a sleep mode for repeating no packet data when the determining means determines that the respective contribution is low, or the numeric value for the contribution does not reach a predetermined threshold or higher.