With the constant emergence of new services, such as 4K, LTE/LTE-A, 5G, IoT, big data, and cloud computing, operators' bearer networks face huge challenges. These services pose demanding requirements on network bandwidth, latency, service provisioning speed, and construction and maintenance costs. Network simplification is a key focus for bearer networks, with the potential to satisfy bandwidth and latency requirements of various new services, shorten time to market, and reduce construction and maintenance costs per bit.
In the era of voice/web services, traffic on metro networks is small and bearer networks mainly use ring topologies in which services are converged layer by layer and forwarded hop by hop.
However, in the era of ultra-high definition (UHD) video, networks need to support real-time high-quality transmission with high bandwidth, low latency, and low jitter. The network convergence ratio decreases from 16:1 in the web era to 2:1. Conventional transmission with high convergence ratios and bandwidth sharing on ring networks cannot satisfy new requirements. Huawei's simplified network solution addresses this issue. In this solution, OTN equipment is introduced to simply network architecture by shifting from a ring topology to a tree topology, reducing network layers and achieved one-hop access to IP nodes without intermediate convergence or forwarding. This solution provides high bandwidth, low latency, and zero packet loss.