A new buffering design concept for Voice Over Internet Protocol (VOIP)

摘要

Priority Queuing (PQ) algorithm is a more popular technique which used in the VoIP network to reduce delays. In the PQ algorithm there are four buffering packet are low, normal, medium and high. The buffering packet in PQ algorithm is greedy. However, fourth the buffering is not optimal used. It is caused by PQ algorithm is based on the priority, whereas this buffering just always serviced is highest priority. While under priority are rarely or never serviced will cause other buffering rarely used. While SPBA algorithm is architecture easiest and it does not need any resource reservation or threshold dropping, but only makes use of priority scheduling. On the SPBA algorithm, where incoming packets are placed into the two priority traffic classes is high class and low class. On the SPBA algorithm is there are not available reservation sources to save the remaining packets when the explosion (burst) traffic occurred, which could impact to packet drop and packet loss. Then, with the efficiency of PQ buffering algorithm, can provide greater impact to reduce delays. This paper showed a new buffer design to simplify two concepts buffer in the PQ algorithm and SPBA algorithm. In the new buffering algorithm, simplify four buffering into three packets (High, Medium and Low) is proposed. In the new buffering algorithm able to handle, solve problems and weaknesses of both algorithms. The new buffering design is expected to provide a better solution for the packet buffering. In the new buffering algorithm, greedy packet buffering does not occur as the PQ algorithm and then discard packets, dropped packets, and packet loss does not happen again like as occurred in the SPBA algorithm.