In the existing operators’ network, the Gateway is deployed as centralized network elements. The path of user plane is long, and the packet latency is high. It makes the user experience not so good. For solving this problem, C/U separation solution has been proposed by 3GPP. ZTE has proposed its own commercial solution based on 3GPP.
ZTE C/U separation solution separates GW-C and GW-U plane. Both are deployed independently. GW-C can be deployed in central sites. GW-U can be deployed as demand in several distributed sites. GW-U is a light weight deployment network element and it’s easy to extend it to distributed sites. Generally, the GW-U deploys in the data center near the end users.