the scheduler logic in the source station attempts as its goal to keep buffer consumption and latency in check instead of making the buffered data amount ratio approach some nominal throughput ratio however the scheduler logic may use latter as a guideline to decide which direction to make an adjustment to the transmit channel allocations because the nominal throughput ratio might not always be accurate especially in variable rate application scenarios the scheduler logic in the source station may increase a transmit channel allocation for a variety of reasons in addition to increasing the transmit channel allocation when the channel condition is worse than expected which results in lower phy rate and or more retransmissions the source station may also increase the transmit channel allocation when the desired transmission rate is higher than expected or for any other reason the desired transmission rate may increase for example for av streaming with variable rate encoding because the actual rate can fluctuate above or below the nominal rate regardless of the reason the dynamic allocation and adjustments described can react to the net effect that the actual data amount in the transmit buffer does not match the nominal throughput ratio as a result the source station may adjust the transmit channel time allocations continuing the previous example suppose that the channel condition to av1 and av2 are both satisfactory but the initial estimate of a 2 to 1 nominal throughput ratio is incorrect and the actual ratio is 1 to 1 then the net effect is that there would be continuous data accumulation in the av2 traffic memory queue.