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Packet Queueing Delay in Resilient Packet Ring Network Nodes

Packet Queueing Delay in Resilient Packet Ring Network Nodes
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摘要 The packet queueing delay is one of the most important performance measures of a data net-work and is also a significant factor to be considered in the scheduling buffer design for a network node. This paper presents a traffic queueing model for resilient packet ring (RPR) networks and a method for quantitatively analyzing queueing delays in RPR nodes. The method was used to calculate the average queueing delays of different priority traffic for different transit queue modes. The simulations show that, in the transmit direction, lower priority traffic is delayed more than higher priority traffic, and that Class-A traffic is delayed more in a single-queue ring than in a dual-queue ring. In the transit direction, the secondary tran-sit buffer in the dual-queue ring contributes more to the traffic delay than the primary transit buffer in the sin-gle-queue ring, which in turn causes more delay than the primary transit buffer in the dual-queue ring. The packet queueing delay is one of the most important performance measures of a data net-work and is also a significant factor to be considered in the scheduling buffer design for a network node. This paper presents a traffic queueing model for resilient packet ring (RPR) networks and a method for quantitatively analyzing queueing delays in RPR nodes. The method was used to calculate the average queueing delays of different priority traffic for different transit queue modes. The simulations show that, in the transmit direction, lower priority traffic is delayed more than higher priority traffic, and that Class-A traffic is delayed more in a single-queue ring than in a dual-queue ring. In the transit direction, the secondary tran-sit buffer in the dual-queue ring contributes more to the traffic delay than the primary transit buffer in the sin-gle-queue ring, which in turn causes more delay than the primary transit buffer in the dual-queue ring.
出处 《Tsinghua Science and Technology》 SCIE EI CAS 2004年第4期406-409,415,共5页 清华大学学报(自然科学版(英文版)
基金 the National High-Tech Research and Devel-opment (863) Program of China (No. 2002AA121041)
关键词 resilient packet ring queueing model queueing delay resilient packet ring queueing model queueing delay
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