Why Network Slicing is Important for 5G?


5G networks must meet diversified demands. ITU classified 5G mobile network services into three categories: Enhanced Mobile Broadband(eMBB), Ultra-reliable and Low-latency Communications (uRLLC), and Massive Machine Type Communications (mMTC).

  1. eMBB focuses on services that have bandwidth high requirements, such as high definition (HD) videos, virtual reality (VR), and augmented reality (AR).
  2. uRLLC focuses on latency-sensitive services, such as assisted and automated driving, and remote management.
  3. mMTC focuses on services that include connection density high requirements, such as smart city and smart agriculture.

5G Network Slicing 

E2E network slicing is a foundation to support diversified 5G services. 
Based on NFV and SDN, the physical infrastructure of the future network architecture consists of sites and three-layer Data Centers.

Sites support multiple modes such as 5G, LTE, and Wi-Fi to implement the RAN real-time function. These functions have high requirements for computing capability and real-time performance and require the inclusion of specific dedicated hardware.

Three-layer cloud DC consists of computing and storage resources.
1- The bottom layer is the central
office of DC, which is closest in relative proximity to the base station side.
2- The second layer
is the local DC.
3- T
he upper layer is the regional DC.

According to diversified service requirements, networks generate corresponding network topologies and a series of network slices for each corresponding service type using NFV on a unified physical infrastructure.
Each network slice
is derived from a unified physical network infrastructure, which reduces subsequent operators’ network Capex. 
Network slices feature a logical arrangement and are
separated as individual structures, which allows for heavily customizable service functions and independent O&M.

Source: Huawei