EdcsuS: Sustainable Edge Data Centers as a Service in sdn-enabled Vehicular Environment

Comment 1: What is the purpose of Fig. 1? The materials in Fig 1 are not explained in the content. Response: The purpose of Fig. 1 was to depict some energy related facts for data centers. However, Fig. 1 has been removed from the revised manuscript as it was creating confusion.


Comment 2: Where are the Figure 1 from? Specify the data sources.
Response: Fig. 1 was misleading the flow of proposed work, therefore it has been removed from the revised manuscript.


Comment 3: What is EDCSuS? This term simply appears in the title once and is never used again in the content.
Response: In this paper, EDCSuS: Sustainable EDC as a service framework in software defined vehicular environment is proposed. In this framework, EDCs connected to renewable energy sources are geograph- ically distributed in a smart city instead of a centralized DC to handle vehicular applications closer to their location. EDCSuS framework is divided into four modules which work in tandem to achieve the multi-objective solution. Firstly, a software defined controller handles the incoming vehicular requests and suggest an optimal flow path for the same. Secondly, a multi-leader multi-follower Stackelberg game is presented for renewable energy-aware resource allocation to 5G-enabled vehicles. Thirdly, to improve the resource utilization, a cooperative resource sharing scheme is designed, thereby minimizing the energy con- sumption of servers located in the EDCs. Lastly, a mutual information sharing and caching scheme is presented to avert excessive energy consumption for retracing the lost link due to mobility of the vehicles.
As per the suggestion of the reviewer, the role of EDCSuS has been highlighted at various occasions throughout the manuscript.


Comment 4: Figure 2 is a schematic layout without sufficient scientific definitions. This figure does not reflect the actual considerations about the vehicular users, cloud infrastructures and energy sources. Please consider re-designing the figure.
Response: Figure 2 (Fig. 1 in revised manuscript) is simple a layout of edge data centers in the proposed framework. The same has been shifted to the introduction part (Section 1, page 2). Fig. 2 (which was Figure 4 in previous version) depicts the actual considerations about the vehicular users, cloud infrastruc- tures and energy sources (Section 3, page 4). Moreover, Fig. 3 is also added to show the architecture of renewable energy powered edge data centers (Section 3.2, page 5).