Patent ID: 8630239

Claim:
A contention-based data communication system in an IEEE 802.11 EDCA type wireless communication system in which a plurality of terminals contend to obtain data transmission resources, the system comprising: a base station configured to control the IEEE 802.11 EDCA type wireless communication system; and the plurality of terminals connected to the base station and configured to transmit and receive data, wherein a terminal of the plurality of terminals transmits a data frame, where frame control, duration identification (ID), address, sequence control, quality of service (QoS) control and terminal state information representing a state thereof is included in a MAC header area of the data frame, to the base station, wherein the terminal state information includes a load volume and a temperature of a CPU of the terminal, and wherein the base station requests the terminal state information from the terminal when a channel contention mode is to be re-set, determines whether values of the channel contention parameters are to be adjusted, adjusts the values of the channel contention parameters using the terminal state information, re-sets the channel contention mode according to the adjusted values of the channel contention parameters in such a manner that a transmission waiting time becomes shorter as the load volume and the temperature of the CPU decreases, transmits information about the re-set channel contention mode to the terminal, and transmits data according to the re-set channel contention mode to the terminal.