Page 96 - 5G Basics - Core Network Aspects

1 Core network aspects

LINP manager for LINP 1
LINP 1 On-demand,
scheduled

Users
LINP manager for LINP 2
LINP 2

Resource partitioning per user's demand LINP manager for LINP 3 LINP 3 Virtual resources manager

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Figure 2 – Concept of LINP provided by network virtualization

Network virtualization can improve the utilization of physical resources by allowing multiple virtual resources
to coexist in a physical resource. Also, the abstraction and programmability property provides standard
interfaces for managing and modifying the LINPs and help to support seamless modification and migration
of the network in order to provide services whose functions are designed to be appropriate to the needs of
applications and users.

7 Problem spaces

This clause investigates the problems of current networks and how network virtualization can be used to
mitigate the problems.

7.1 Coexistence of multiple networks
Conventional technologies, such as virtual private network (VPN) and virtual local area network (VLAN), are
typically used for providing isolated networks over shared physical networks. However, it is known that these
technologies have disadvantages and limitations.

For example, VPN relies on tunnelling mechanisms and internet protocol security (IPsec) in order to provide
secure multiple networks over public networks. However, the current VPN technologies suffer from
disadvantages in scalability, performance and throughput, which are caused by the complex encapsulation
and authentication mechanisms. So, it appears that adding VPN mechanisms to existing protocols brings

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