Information-centric mobile caching network frameworks and caching optimization: a survey <s> Mobile caching networking integrated with SDN and NFV <s> ICN deployment will be based on the grounds of saving CAPEX/OPEX and/or enabling new services. This paper makes a case for the latter leveraging, emerging technologies such as network function virtualization (NFV) and software defined networking (SDN). We propose a framework to enable ICN based service platform as virtualized network functions to enable several edge-cloud services such as enterprise applications, big data analytic, or M2M/IoT services. This platform is generic to support several ICN protocols and corresponding real-time and non-real time services leveraging ICN features such as name based routing, caching, multicasting, and flexible security techniques. As an implementation of this architecture, we discuss how a scalable network based conferencing solution can be realized over the proposed ICN platform and compare it with a peer-to-peer design through a performance analysis. <s> BIB001 </s> Information-centric mobile caching network frameworks and caching optimization: a survey <s> Mobile caching networking integrated with SDN and NFV <s> The demand for rich multimedia services over mobile networks has been soaring at a tremendous pace over recent years. However, due to the centralized architecture of current cellular networks, the wireless link capacity as well as the bandwidth of the radio access networks and the backhaul network cannot practically cope with the explosive growth in mobile traffic. Recently, we have observed the emergence of promising mobile content caching and delivery techniques, by which popular contents are cached in the intermediate servers (or middleboxes, gateways, or routers) so that demands from users for the same content can be accommodated easily without duplicate transmissions from remote servers; hence, redundant traffic can be significantly eliminated. In this article, we first study techniques related to caching in current mobile networks, and discuss potential techniques for caching in 5G mobile networks, including evolved packet core network caching and radio access network caching. A novel edge caching scheme based on the concept of content-centric networking or information-centric networking is proposed. Using trace-driven simulations, we evaluate the performance of the proposed scheme and validate the various advantages of the utilization of caching content in 5G mobile networks. Furthermore, we conclude the article by exploring new relevant opportunities and challenges. <s> BIB002 </s> Information-centric mobile caching network frameworks and caching optimization: a survey <s> Mobile caching networking integrated with SDN and NFV <s> Over recent years, the demand for rich multimedia services over mobile networks has been soaring at a tremendous pace. However, it is envisioned that traditional dedicated networking equipment in mobile network operators (MNOs) cannot support the phenomenal growth of the traffic load and user demand dynamics, but consume unnecessary energy resource inefficiently. The emerging techniques for mobile content caching and delivery become more and more attractive, by which popular content can be cached inside mobile front-haul and back-haul networks, so that demands to the same content from users in proximity can be easily accommodated without redundant transmissions from the remote resource, thereby eliminating duplicated traffic significantly. While the incorporation between advanced cloud computing technologies and network function virtualization (NFV) techniques has become an essential issue in the evolution process of mobile systems, in this article, we propose the concept of “Caching-as-a-Service” (CaaS), a caching virtualization framework along with the development of Cloud-based Radio Access Networks (C-RAN), and the virtualization of Evolved Packet Core (EPC). Then we study the potential techniques related to the cache virtualization, and discuss technical details of caching virtualization and system optimization for CaaS. We carry out numerical evaluation on proposed framework and show significant improvement on the performance of reducing inter-MNO traffic load and intra-MNO traffic load. <s> BIB003 </s> Information-centric mobile caching network frameworks and caching optimization: a survey <s> Mobile caching networking integrated with SDN and NFV <s> Nowadays, the explosively growing demands for mobile service bring both challenges and opportunities to wireless networks, giving birth to fifth generation (5G) mobile networks. The features and requirements of different services are diverse in 5G. The management and coordination among heterogeneous networks, applications, and user demands need the 5G network to be open and flexible to ensure that network resources are allocated with high efficiency. To fulfill these requirements, wireless network virtualization is used to integrate heterogeneous wireless networks and coordinate network resources. In this article we propose a model of wireless network virtualization consisting of three planes: the data plane, the cognitive plane, and the control plane. A novel control signaling scheme has also been designed to support the proposed model. From the implementation perspective of network virtualization, a hierarchical control scheme based on cell-clustering has been used with dynamically optimized efficiency of resource utilization. Two use cases have been analyzed to demonstrate how the schemes work under the proposed model to improve resource efficiency and the user experience. <s> BIB004 </s> Information-centric mobile caching network frameworks and caching optimization: a survey <s> Mobile caching networking integrated with SDN and NFV <s> Wireless network virtualization and information-centric networking (ICN) are two promising techniques in software-defined 5G mobile wireless networks. Traditionally, these two technologies have been addressed separately. In this paper we show that integrating wireless network virtualization with ICN techniques can significantly improve the end-to-end network performance. In particular, we propose an information- centric wireless network virtualization architecture for integrating wireless network virtualization with ICN. We develop the key components of this architecture: radio spectrum resource, wireless network infrastructure, virtual resources (including content-level slicing, network-level slicing, and flow-level slicing), and informationcentric wireless virtualization controller. Then we formulate the virtual resource allocation and in-network caching strategy as an optimization problem, considering the gain of not only virtualization but also in-network caching in our proposed information-centric wireless network virtualization architecture. The obtained simulation results show that our proposed information-centric wireless network virtualization architecture and the related schemes significantly outperform the other existing schemes. <s> BIB005 </s> Information-centric mobile caching network frameworks and caching optimization: a survey <s> Mobile caching networking integrated with SDN and NFV <s> The Internet-of-Things (IoT) envisions a world where billions of everyday objects and mobile devices communicate using a large number of interconnected wired and wireless networks. Maximizing the utilization of this paradigm requires fine-grained QoS support for differentiated application requirements, context-aware semantic information retrieval, and quick and easy deployment of resources, among many other objectives. These objectives can only be achieved if components of the IoT can be dynamically managed end-to-end across heterogeneous objects, transmission technologies, and networking architectures. Software-defined Networking (SDN) is a new paradigm that provides powerful tools for addressing some of these challenges. Using a software-based control plane, SDNs introduce significant flexibility for resource management and adaptation of network functions. In this article, we study some promising solutions for the IoT based on SDN architectures. Particularly, we analyze the application of SDN in managing resources of different types of networks such as Wireless Sensor Networks (WSN) and mobile networks, the utilization of SDN for information-centric networking, and how SDN can leverage Sensing-as-a-Service (SaaS) as a key cloud application in the IoT. <s> BIB006 </s> Information-centric mobile caching network frameworks and caching optimization: a survey <s> Mobile caching networking integrated with SDN and NFV <s> With ever growing mobile Internet and the explosion of its applications, users are experiencing abundant services from different content providers via different network service providers in the heterogeneous network. The information-centric network (ICN) advocates getting rid of the current host-centric network protocol because information dissemination rather than end-to-end communication contributes to the majority of today's network traffic. Furthermore, it is better for network entities to converge as a whole in order to take advantage of open, scalable, and smart traffic transmission. The cloud radio access network is one of the emerging architecture evolutions on the wireless side for easier infrastructure deployment and network management. Therefore, when the information-centric network meets the C-RAN in the Het-Net, it is worthwhile and consequential to integrate ICN protocol with C-RAN architecture to achieve more efficient communication and information management. Moreover, SDN has been recognized as another promising architecture evolution to achieve the flexibility and reconfigurability of dense HetNets; its inherent advantage lies in global uniform control of the wired network. Thus, any of ICN, C-RAN and SDN is the complementary to the others. In this article, we contribute to a fresh proposal for and elaboration of the integration of the ICN, CRAN, and SDN for the HetNet to achieve a win-win situation. The vision of the proposed system is demonstrated, followed by the advantages and challenges. We further present a hybrid system in a large-scale wireless heterogeneous campus network. <s> BIB007
The software-defined networking (SDN) and network function virtualization (NFV) promote the new trend of virtualizing mobile network functions into softwarebased cloud servers with the aim to resource optimal utilization BIB003  BIB004 . The use of virtualization in mobile caching network can stimulate MNOs to adjust their functions in an online manner dynamically. Since SDN is mostly focusing on the adaptability and controllability of network functions using virtualized resource management systems, this would lead to the controllable networking of nodes, scalability and elasticity for resource utilization adapting to user and content dynamics BIB002 . Several research issues focus on the SDN and NFV of mobile caching networks. The information-centric wireless network virtualization architecture is proposed in BIB005 by integrating wireless network virtualization with ICN. In the architecture, radio spectrum resource, wireless network infrastructure, virtual resources and information centric wireless virtualization controller are regarded as key components. Virtual resource is divided by contentlevel slicing, network-level slicing, and flow-level slicing. The virtual resource allocation is formulated as an optimization problem compared with in-network caching strategy. However, the detailed virtualization method is still an open issue, especially at the interfaces between in-network caching and virtualization controllers. In BIB001 , an ICN based edge-cloud service framework is presented leveraging NFV and SDN technologies. In BIB006 , the application of SDN in managing resources of different types of networks is analyzed in Wireless Sensor Networks (WSN) and mobile networks, the utilization of SDN for information-centric networking, and how SDN can leverage Sensing-as-a-Service (SaaS) as a key cloud application in the IoT are addressed. In BIB007 , a SDN based framework is presented for C-RAN in HetNet to achieve more efficient communication and information management. From the literatures summarized above, it reveals that the research works of SDN and NFV in mobile caching network are primary studies conducted from theoretical point of view. Due to the rapid growth of traffic load and user demand for information-centric mobile content services, it is believed that mobile caching strategy integrated with SDN and NFV is a new potential research direction for further study.