Patent ID: 9473962
Filing Date: 2016-10-18
CPC Classification: H04W

Claim Text:
1. A wireless transmission rate adjustment method to adjust the wireless transmission rate of a wireless transmission device which is capable of selecting one of several transmission rates to transmit data in which at least one of the several transmission rates corresponds to multiple transmission modes including a first transmission mode and a second transmission mode, comprising: having the wireless transmission device enter a try state from a normal state in which the wireless transmission device transmits data at an original transmission rate before entering the try state; under the try state, having the wireless transmission device transmit one or more test packets according to a first modulation and coding scheme (MCS), and determining whether the wireless transmission device transmits the one or more test packets successfully according to a predetermined condition; if the transmission of the one or more test packets is successful with the first MCS, having the wireless transmission device return to the normal state and transmit data with the first MCS; if the transmission of the one or more test packets is unsuccessful with the first MCS, having the wireless transmission device transmit another one or more test packets according to a second MCS in the try state, and determining whether the wireless transmission device transmits the another one or more test packets successfully in accordance with the predetermined condition; if the transmission of the another one or more test packets is successful with the second MCS, having the wireless transmission device return to the normal state and transmit data with the second MCS; and if the transmission of the another one or more test packets is failed with the second MCS, having the wireless transmission device return to the normal state and transmit data at the original transmission rate or with the first MCS, wherein at least one of the transmission rates of the first MCS and the second MCS is different from the original transmission rate, the first MCS corresponds to the first transmission mode while the second MCS corresponds to the second transmission mode, and if the transmission rate of the first MCS is higher than the original transmission rate, the first transmission mode is a multiple spatial stream mode and the second transmission mode is a single spatial stream mode.