Guangzhou West 2nd Ring Expressway Transmission System
Solution: Infinova fiber optic networks and transmission
The Guangzhou West 2nd Ring Expressway, also known as the Xiaotang to Maoshan section of Guangzhou City-circular Highway of the National Main Trunk Line, connects six expressways of approximately 42 kilometers. With it, travelers driving from Foshan to the new Guangzhou Airport now have a direct link.
The surveillance system used on the expressway differs from a traditional CCTV system. The highway systems has decentralized edge sites, distributed along the expressways, all of which need to stand up to weather extremes, temperature fluctuations and the other rigors of an outdoor environment. Due to the long distances, transmission quality is a challenge and fiber is was the best choice for this intelligent highway system (ITS). To assure reliability within the Guangzhou expressway surveillance system, two different types of transmission modes are deployed, node fiber optic modems and video encoders/decoders.
Traditionally, peer-to-peer digital fiber optic modems have been used in such systems. Although they are priced very competitively, they can create problems. Since a peer-to-peer set-up requires fiber to be run from each of the edge sites to the monitoring site, the amount of fiber needed for a highway surveillance system can be quite high. This not only increases the overall investment in materials but also impacts the cost of installation.