- The paper surveys the integration of software-defined networking and network virtualization to address challenges in current mobile and wireless networks and propose future architectures.
- It explains how Software-Defined Wireless Networks (SDWN) decouple control and data planes and Wireless Network Virtualization (WNV) creates virtual networks over shared infrastructure.
- The survey proposes their synergistic integration for scalable, programmable, and efficient networks while identifying challenges like resource management and heterogeneous compatibility.
Overview of "Software-Defined and Virtualized Future Mobile and Wireless Networks: A Survey"
The manuscript under consideration surveys the integration of software-defined networking (SDN) and network virtualization (NV) within the context of mobile and wireless networks (MWN). The authors, Mao Yang et al., thoroughly explore the potential of these nascent technologies to address systemic challenges inherent in current MWN architectures, all while providing a forward-looking perspective on future mobile and wireless networks.
The paper identifies several pressing challenges of existing MWNs, such as the scarcity of spectrum resources juxtaposed with inefficient utilization, the difficulty of integrating heterogeneous networks for seamless interoperability, and the ossified nature of traditional network infrastructures that stifle innovation. The growth in multimedia-oriented mobile applications exacerbates these issues by increasing demands for diverse network capabilities that the existing networks fail to meet efficiently, resulting in a decline in Quality of Service (QoS) and Quality of Experience (QoE) for end users. Furthermore, the disparity between rising infrastructure costs and stagnating revenues for network carriers necessitates an architectural overhaul rather than incremental enhancements.
To tackle these challenges, the paper champions the deployment of software-defined wireless network (SDWN) and wireless network virtualization (WNV). SDWN extends the principles of SDN to wireless environments, thereby decoupling the control plane from the data plane, which allows the network to be reconfigured programmatically through a centralized controller. This architectural evolution is posited to simplify network operations, improve resource allocation, and support the seamless interworking of diverse network types. SDWN also promises enhanced network flexibility, aligning with the complex dynamism of modern wireless environments and paving the way for smoother technological advancements.
In parallel, WNV allows for the creation of multiple virtual networks over a shared physical substrate, decoupling infrastructure provision from service delivery. By doing so, WNV facilitates the dynamic allocation of resources according to varying service demands, granting service providers the capability to deliver bespoke services tailored to distinct application needs, which in turn increases the overall system efficiency and user satisfaction. The paper suggests that WNV can significantly mitigate current resource allocation inefficiencies and introduce innovative economic models through the separation of infrastructure and service provision roles.
The authors propose a synergistic integration of SDWN and WNV as a pathway towards a more scalable, programmable, and efficient MWN. This joint approach is expected to yield innovations that address real-time mobility, scalability, and fine-grained resource management in the increasingly heterogeneous and data-intensive wireless network landscape.
The paper concludes by identifying several challenges and open issues remaining in the realization of software-defined and virtualized mobile networks. These include the complexity of managing virtualized resources, ensuring compatibility across heterogeneous technologies, the development of scalable control strategies, and the need for novel economic models.
Looking ahead, this survey provides a comprehensive theoretical and practical basis for researchers and engineers seeking to advance the capabilities of future mobile and wireless communication systems through the integration of SDWN and WNV. Implementing these technologies could set the stage for a new era of mobile communications characterized by robust, adaptable, and cost-effective network infrastructures capable of meeting the demands of burgeoning mobile applications and services.
