01756nas a2200205   4500008004100000245006800041210006800109260000900177300001400186490000700200520109000207653002501297653001701322653002701339653002501366100001301391700001601404700001301420856011701433       2013                        eng d00aFair virtual bandwidth allocation model in virtual data centers0 aFair virtual bandwidth allocation model in virtual data centers  c2013  a179 - 1830 v113 aNetwork virtualization opens a promising way to support diverse applications over a shared substrate by running multiple virtual networks. Current virtual data centers in cloud computing have flexible mechanisms to partition compute resources but provide little control over how tenants share the network. This paper proposes a utility-maximization model for bandwidth sharing between virtual networks in the same substrate network. The aim is to improve the fairness of virtual bandwidth allocation for multi tenants, especially for virtual links which share the same physical link and carry nonfriendly traffic. We first given a basic model and then proved the model can be split into many sub models which can run on each rack-switch port. In the sub model, every physical link is associated with a fairness index constraint in maximize utility calculating. The goal is to limit the differences among the bandwidth allocation of the virtual links which share the same physical link. Experimental results show that the virtual bandwidth allocation between tenants is more reasonable.10aBandwidth allocation10aMulti-tenant10aNetwork virtualization10aVirtual data centers1 aYuan, Y.1 aWang, C.-R.1 aWang, C.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84880784551&partnerID=40&md5=592719b8e0f5ff76a5dbdb85fdbe06e3