Method for managing data throughput

A method for managing data throughput of a network device in one of an uploading direction and a downloading direction, the method comprising steps of:

• determining each network communication, through which the network device transmits data, as belonging to which one of a first class related to a network service that requires a greater bandwidth for smooth transmission of data, and a second class related to a network service that requires a less bandwidth, the first class of network communication having a guaranteed minimum bandwidth reserved therefor;
• for each data packet that is received by the network device through the network communication determined as belonging to the first class, enqueuing the data packet to a first queue;
• for each data packet that is received by the network device through the network communication determined as belonging to the second class, enqueuing the data packet to a second queue;
• dequeuing the first queue and the second queue at a dequeuing ratio by transmitting each data packet enqueued to the first queue through the network communication determined as belonging to the first class and transmitting each data packet enqueued to the second queue through the network communication determined as belonging to the second class, the dequeuing ratio being a ratio of an amount of data packets dequeued from the first queue to an amount of data packets dequeued from the second queue;
• determining a data rate of dequeuing the second queue;
• and
• adjusting the dequeuing ratio based on the data rate of dequeuing the second queue thus determined, a total bandwidth for the network device, and the guaranteed minimum bandwidth for the network communication determined as belonging to the first class,
• wherein the step of adjusting the dequeuing ratio includes gradually increasing the dequeuing ratio when the data rate of dequeuing the second queue is increasing, and
• wherein the adjusting the dequeuing ratio includes:
• making the dequeuing ratio equal to a lower ratio value when the data rate of dequeuing the second queue is smaller than a lower reference value, the lower reference value being expressed by (B−R1*K1), where B is the total bandwidth, R1 is the guaranteed minimum bandwidth, and K1 is a predetermined parameter;
• making the dequeuing ratio equal to a predetermined ratio value (Vi) when the data rate of dequeuing the second queue is within a range of greater than (B−R1*Ki-1) and not greater than (B−R1*K1), where i is a variable that is a positive integer ranging from 2 to N−1, each Ki is a parameter having a predetermined value not smaller than one, and N is a predetermined parameter that is a positive integer and represents a number of ranges in which the data rate of dequeuing the second queue may fall;
• and
• making the dequeuing ratio equal to an upper ratio value when the data rate of dequeuing the second queue is greater than an upper reference value, the upper reference value being expressed by (B−R1*KN).