Patent ID: 9408235
Filing Date: 2016-08-02
CPC Classification: H04W

Claim Text:
1. A method for transmitting data by using implicit forward ordering information obtained through competition by means of a distributed coordination function (DCF) in a wireless LAN, comprising: succeeding, by a first station, in transmitting data through a DCF competition at a first transmission round, when one transmission round is defined as a period from the time at which a station starts to compete after a DCF inter-frame space (DIFS) to the time at which a transmission medium starts being idle during a DIFS for a next DCF competition after one or more data transmissions are successfully performed; succeeding, by a second station, in transmitting data through a DCF competition at a second transmission round, when the second transmission round is defined as a transmission round succeeding the first transmission round; confirming, by the first station, the last station of a sequence performed at the second transmission round as an immediate predecessor, when a transmission channel is empty during a point coordinate function (PCF) inter-frame space (PIFS) at the second transmission round; setting implicit forward ordering information in the first station, wherein the first station acquires a channel use right without a DCF competition after the confirmed immediate predecessor, according to the implicit forward ordering information; and transmitting, by the first station, data without a DCF competition after the confirmed immediate predecessor, according to the implicit forward ordering information.