Abstract-Many telecom operators are deploying their own cloud infrastructure with the two-fold objective of providing cloud services to their customers and enabling network functions virtualization. In this article, we present an architecture named as SHINE, which focuses on orchestrating cloud with heterogeneous access and core networks; intra and inter data center (DC) connectivity is dynamically controlled, maximizing the overall performance in terms of throughput and latency whilst minimizing total costs. The main building blocks are: 1) a future-proof network architecture that can scale to offer potentially unlimited bandwidth based on an Active Remote Node (ARN) to interface end-users and the core network; 2) an innovative distributed DC architecture consisting of micro-DCs (μ-DC) placed in selected core locations to accelerate content delivery, reducing core network traffic, and ensuring very low latency; and 3) dynamic orchestration of the distributed DC and access and core network segments. SHINE will provide unprecedented Quality of Experience (QoE), greatly reducing costs by coordinating network and cloud and facilitating service chaining by virtualizing network functions.
INTRODUCTIONA revolution in access networks is underway. The revolution is driven by the continued transformation of cellular networks offering to portable devices bit-rates and Quality of Service (QoS) comparable to those traditionally made available only through fixed networks. Driven by demand for video and the proliferation of data centers (DC), more than 75 percent of that traffic will stay in access/metro networks by 2017, as compared to 57 percent today, as forecasted in [1]. Accommodating the enormous traffic growth in a cost-effective and service-efficient way is essential for the viability of telecom operators and motivates a major network re-design. In fact, these shifting traffic patterns are the result of bringing content closer to the users to better manage quality of experience (QoE). For instance, the most popular video content can be cached and delivered to users locally over access/metro networks rather than being accessed from a central cache over the backbone network.Coordinating these and new advanced services to be offered to a widely distributed number of customers requires building advanced service chains. Nevertheless, building service chains is very expensive and time consuming, since it requires, besides deploying dedicated hardware for each required network function, configuring each device using its proprietary command syntax, interfaces and protocols. Moreover, since loads often change over time, building a new service chain typically requires estimating future demands and over-provisioning IT and network resources to support growth. This prevents from reducing the final price that users pay undermining the average revenue per user (ARPU).The continuous advances in computing hardware facilitate real-time processing to be performed on commodity hardware instead of specialized one. These advances enable ...