In order to guarantee the quantity of data traffic delivered in the network, congestion control strategy is adopted.
According to the study of many active queue management (AQM) algorithms, this paper proposes a novel active queue
management algorithm named JFED. JFED can stabilize queue length at a desirable level by adjusting output traffic rate
and adopting a reasonable calculation of packet drop probability based on buffer queue length and traffic jitter; and it
support burst packet traffic through the packet delay jitter, so that it can traffic flow medium data. JFED impose effective
punishment upon non-responsible flow with a full stateless method. To verify the performance of JFED, it is
implemented in NS2 and is compared with RED and CHOKe with respect to different performance metrics. Simulation
results show that the proposed JFED algorithm outperforms RED and CHOKe in stabilizing instantaneous queue length
and in fairness. It is also shown that JFED enables the link capacity to be fully utilized by stabilizing the queue length at
a desirable level, while not incurring excessive packet loss ratio.
AS businesses become more dependent on IP networks, lots of real-time services are adopted and high availability in networks has become increasingly critical. With the development of carrier grade ethernet, the requirements of high speed metro ethernet device are more urgently. In order to reach the capacity of hundreds of Gbps or Tbps, most of core ethernet switches almost adopted distributed control architecture and large capacity forwarding fabric. When distributed switch works, they always have one CE and many FE. There for, it shows the feature of multicast with one sender and many receivers. It is deserved research for us how to apply reliable multicast to distributed switch inner communication system. In this paper, we present the general architecture of a distributed ethernet switch, focusing on analysis the model of internal communication subsystem. According to its character, a novel reliable multicast communication mechanism based on FEC recovery algorithm has been applied and evaluated in experiment.
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