In the ICAOs Asia / Pacific regional report dated 2010, I read about the implementation of an ADS-B air-ground surveillance system to facilitate data exchange in boundary areas between neighboring ACCs of States in that area. It appears ADS-B ground stations were under construction (since 2007)for sharing in the SE Asia Sub Region of Malaysia, Thailand, Laois, Cambodia, Vietnam, Indonesia and that operational trials were expected to be conducted by the end of 2010. ADS-B is recognised as being more accurate alternative surveillance solution to radar in areas where radar installations are impractical. Does any one know what happened to this plan? Was it up and running even partially?