A Survey on QOS Guaranteed Bandwidth Shifting and Redistribution in Mobile Cloud Environment

Mobile Cloud Computing (MCC) is an integration of cloud computing in the mobile environment which is used to improve the overall performance of the mobile devices. Mobile Cloud Computing faces a number of challenges both in mobile side and computing side, one of which is providing Quality-of Service (QoS), even if the interfacing gateway changes due to the mobility of the users Mobile devices are roaming over the network and switching the interfacing gateways they connect to. This results into change in quality of service. . Due to node mobility, bandwidth shifting is required for providing QoS-guarantee to the mobile nodes. However, shifting alone is not always sufficient for maintaining the QoS-guarantee because of varying spectral efficiency across the associated channels, coupled with the corresponding protocol overhead involved with the computation of utility so that we are formulating bandwidth redistribution as a utility maximization problem, and solves it using a modified descending bid auction. For this purpose we are using Auction based bandwidth redistribution (AQUM) algorithm. In the auction process, each gateway participates as a bidder and the Cloud service provider (CSP) acts as an auctioneercum-seller. We use descending price auction for determining the optimum bandwidth allocationthis maximizes the utility vector.