Adaptive contention window in discontinuous wireless communication channels

A device for discontinuous wireless communication comprising:

• a memory for storing data for a transmission queue;
• a transceiver for transmitting and receiving data;
• and
• a processor configured to detect a transmission failure during a portion of one or more previous discontinuous channel access intervals and estimate a first likelihood of channel collisions at start of a first discontinuous channel access interval, wherein channel collisions are based on transmission failures of information transmitted by the device in a discontinuous channel, wherein the estimated likelihood of collision is set to be greater than a likelihood of channel collisions that was set for a previous discontinuous channel access interval, when a transmission failure of the information transmitted by the device in the discontinuous channel is detected during said portion of one or more previous channel access intervals, to set a size of a contention transmission window at start of a current discontinuous channel access interval after the first discontinuous channel access interval according to the first estimated likelihood of channel collisions, and to estimate a second likelihood of channel collisions for a next discontinuous channel access interval after the current discontinuous channel access interval, wherein the transceiver transmits the stored data for the transmission queue according to the set size of the contention transmission window, and wherein the discontinuous channel includes a no access interval during which the channel is not available for data transmission and an access interval during which the channel is available for data transmission, where the first or second estimated likelihood of channel collision is increased when a channel busy is detected during a portion of one or more previous channel intervals.

A system for wireless communication between a transmitting device and a receiving device over a discontinuous communication channel comprising:

• means for estimating a first likelihood of channel collisions at start of a first discontinuous channel access interval, wherein channel collisions are based on transmission failures of information transmitted by the transmitting device in the discontinuous channel, wherein the estimated likelihood of channel collisions is set to be greater than a likelihood of channel collisions that was set for a previous discontinuous channel access interval, when a transmission failure of information transmitted by the transmitting device in the discontinuous channel is detected during a portion of one or more previous channel access intervals, and wherein the discontinuous channel includes a no access interval during which the channel is not available for data transmission and an access interval during which the channel is available for data transmission;
• means for setting a size of a contention transmission window at start of a current discontinuous channel access interval after the first discontinuous channel access interval, according to the first estimated likelihood of channel collisions;
• means for estimating a second likelihood of channel collisions ‘/’ for a next discontinuous channel access interval alter the current discontinuous channel access interval;
• and
• means for dynamically changing the size of the contention transmission window for the next discontinuous channel access interval, according to the second estimated likelihood of channel collisions,
• where the first or second estimated likelihood of channel collision is increased when a channel busy is detected during a portion of one or more previous channel intervals.