[Paper Review] Mobility Management as a Service for 5G Networks

Akshay Jain, Elena López-Aguilera+1 more|arXiv (Cornell University)|May 25, 2017

IPv6, Mobility, Handover, Networks, Security5 references16 citations

TL;DR

This paper proposes Mobility Management as a Service (MMaaS) for 5G networks to address scalability and flexibility challenges in handling increasing user and traffic demands. By decentralizing mobility management into on-demand, modular services, MMaaS enables dynamic resource allocation and fine-grained service control, enhancing network adaptability for diverse 5G use cases while addressing key challenges in scalability and service granularity.

ABSTRACT

Mobility Management (MM) techniques have conventionally been centralized in nature, wherein a single network entity has been responsible for handling the mobility related tasks of the mobile nodes attached to the network. However, an exponential growth in network traffic and the number of users has ushered in the concept of providing Mobility Management as a Service (MMaaS) to the wireless nodes attached to the 5G networks. Allowing for on-demand mobility management solutions will not only provide the network with the flexibility that it needs to accommodate the many different use cases that are to be served by future networks, but it will also provide the network with the scalability that is needed alongside the flexibility to serve future networks. And hence, in this paper, a detailed study of MMaaS has been provided, highlighting its benefits and challenges for 5G networks. Additionally, the very important property of granularity of service which is deeply intertwined with the scalability and flexibility requirements of the future wireless networks, and a consequence of MMaaS, has also been discussed in detail.

Motivation & Objective

• Address the limitations of centralized mobility management in handling the exponential growth of users and traffic in 5G networks.
• Introduce a service-oriented architecture for mobility management to improve network flexibility and adaptability to diverse 5G use cases.
• Enable on-demand provisioning of mobility management functions to support dynamic and scalable network operations.
• Investigate the role of service granularity in enhancing scalability and flexibility within future wireless networks.
• Provide a comprehensive analysis of the benefits and challenges of implementing MMaaS in 5G environments.

Proposed method

• Propose a service-based architecture where mobility management functions are exposed as modular, on-demand services.
• Decouple mobility management from centralized entities, distributing responsibilities across multiple service instances.
• Introduce a model for dynamic service instantiation and orchestration based on network demand and user mobility patterns.
• Define service granularity as a key architectural property enabling fine-tuned control and efficient resource allocation.
• Utilize a microservices-inspired approach to implement scalable and composable mobility management components.
• Leverage existing network function virtualization (NFV) and software-defined networking (SDN) principles to enable flexible service deployment.

Experimental results

Research questions

• RQ1 How can mobility management in 5G networks be decoupled from centralized control to improve scalability and flexibility?
• RQ2 What architectural patterns enable on-demand provisioning of mobility management functions in dynamic 5G environments?
• RQ3 How does service granularity impact the performance, scalability, and adaptability of mobility management in 5G networks?
• RQ4 What are the key challenges in implementing a service-oriented mobility management framework for 5G?
• RQ5 How does MMaaS support diverse 5G use cases requiring varying levels of mobility control and responsiveness?

Key findings

• MMaaS enables dynamic, on-demand instantiation of mobility management functions, significantly improving network adaptability to varying traffic and user mobility patterns.
• The proposed service-based model enhances scalability by distributing mobility control across multiple lightweight service instances instead of relying on monolithic central entities.
• Service granularity is identified as a critical enabler for achieving both fine-grained control and efficient resource utilization in 5G mobility management.
• The architecture supports diverse 5G use cases by allowing tailored mobility service levels based on application requirements and network conditions.
• The paper highlights that decoupling mobility management from centralized control reduces single points of failure and improves fault tolerance.
• MMaaS provides a foundation for future network evolution by aligning with NFV and SDN principles, enabling automated orchestration and service lifecycle management.