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QoS mechanism for virtualized wireless networks with software‐defined networking
Author(s) -
Chen JiannLiang,
Kao SanPeng
Publication year - 2014
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.2775
Subject(s) - computer science , openflow , quality of service , computer network , network packet , software defined networking , mobile qos , packet loss , service provider , service (business) , economy , economics
Summary An effective Quality‐of‐Service (QoS) mechanism is essential for high‐quality Internet services. One QoS solution, rate limiting, is now a common strategy for obtaining a desired QoS from end‐to‐end traffic flow. Because of the high sensitivity of the QoS metric, implementing rate‐limiting QoS in hardware obtains better accuracy compared with evaluation by simulation models. For virtualized wired‐wireless networks, this study proposes a software‐defined networking based QoS mechanism based on OpenFlow‐enabled Net Field Programmable Gate Array platform. The OpenFlow wildcard table module in the user data path is modified to budget each packet with a certain buffer speed when the packets pass the output queues. The modified OpenFlow network isolates traffic flow and limits the traffic rate according to the budgeted bandwidth. The experimental results show that the mechanism achieves 4.6% improvement in packet loss and 47% improvement in delay. Copyright © 2014 John Wiley & Sons, Ltd.