Achieve Efficient and Low-Cost Distributed Deployment
At the beginning of designing 3GPP standard, 5G core network adopts the inborn C/U separation architecture. Combined with the SBA concept, user plane is designed as an independent UPF, while control plane is further divided into SMF and AMF. One or more UPFs are deployed according to the actual needs. The UPFs are deployed based on the service traffic, in a centralized manner or at the edge in a distributed manner, thus meeting the requirements of 5G for big bandwidth, low latency and high reliability. The CUPS (Control and User Plane Separation) has two architectures: Non-Full Mesh Networking and Full Mesh Networking.
Non-Full Mesh Networking Solution: One SMF can be interconnected with multiple UPFs, and one UPF belongs to only one SMF. When the SMF fails, all UPFs under this SMF cannot provide services, resulting in resource waste.
Therefore, ZTE introduces the Full Mesh Highly Reliable Networking Solution . SMFs are uniformly deployed on the control plane, and full interconnection is made between SMF and UPF. Any SMF covers the entire Full Mesh networking range. UPF is deployed according to the service and user scale in the coverage area.
High Resource Utilization
C-Pool reduces redundancy on the C-plane. One U-plane corresponds to multiple C-planes of C-Pool, which is improved from the traditional 1+1 to N+M. This way can provide carrier-class high reliability and improve resource utilization;
Any failure of SMF or UPF only affects the online users related to the failure SMF or UPF. In Full Mesh networking, all the other SMFs/UPFs can continue to work normally.
Control plane and user plane can be expanded or reduced independently. When the number of users increases but the throughput does not increase, it is only necessary to expand SMF independently. When the throughput increases but the number of users does not increase, it is only necessary to expand UPF independently.