An SDN-Based QoS Guaranteed Mechanism for Geospatial Flows
Feilong Huang, Jianzhong Zhang, Jingdong Xu, Yiran Shao, Lingjun Pu · 2019
As a significant portion of big data, geospatial big data is experiencing extremely rapid growth, which brings tremendous pressure and great challenges on geospatial data servers. To provide better services for users, it is an important approach to enable the transmission of geospatial data with QoS, which mainly focus on bandwidth. Therefore, based on the software-defined network(SDN), this paper puts forward a bandwidth guaranteed mechanism for geospatial flows for the first time. In our proposed mechanism, taking advantage of the fuzzy analytic hierarchy process(FAHP), a prioritization model for geospatial flows is proposed to calculate the comprehensive priority. With the comprehensive priority, geospatial flows are mapped into slices with different QoS levels. And then, a dynamic routing algorithm and a bandwidth adjustment mechanism are proposed to guarantee the transmission of geospatial flows with high-priority in sliced SDN. Experimental results show that the proposed QoS guaranteed mechanism has the ability to provide differentiated services for geospatial flows, and it can help to alleviate congestion in the geospatial cloud data center as well.