Method and apparatus for adaptively managing buffer in communication system including a plurality of network nodes

摘要

A method and apparatus manage a buffer of a lower network node in a communication system. A current queue length of the buffer is monitored in every measurement time. A logical region in which the current queue length is included is determined, among a plurality of logical regions included in the buffer. Each of the logical regions corresponds to a queue length determined by using an upper threshold and a lower threshold of a total queue length of the buffer. A congestion state of a network is detected, and a first queue length is readjusted when the current queue length is included in the first queue length which corresponds to a first logical region that exceeds the upper threshold. And a network congestion state signal that represents the detected congestion state of the network is transmitted to the upper network node.

主权项

1. A method to manage a buffer of a base station (BS) in a communication system, the method comprising:
monitoring a queue length of the buffer; when the queue length is less than a lower threshold and a previous flag comprises a first value indicating a congestion state, setting a current flag as a second value indicating a non-congestion state; when the queue length is greater than an upper threshold and the previous flag comprises the second value, setting the current flag as the first value; when the current flag is set different from the previous flag, transmitting a current flag value to a node and updating the upper threshold; and when one of a first case, a second case, or a third case is satisfied, maintaining the upper threshold, wherein the first case comprises that the queue length is less than the lower threshold and the previous flag comprises the second value, wherein the second case comprises that the queue length is greater than the upper threshold and the previous flag comprises the first value, and wherein the third case comprises that the queue length is no greater than the upper threshold and no less than the lower threshold.