US Patent 11399081 Controlling access to data resources on high latency networks

A DACD for controlling access to data resources in a high latency network is provided. The DACD includes a high latency network interface for connecting with a remote network, and a local network interface for connecting with a local network. Communications with the local network have a lower latency than communications with the remote network. The DACD is programmed to receive using the local network interface a request including a resource identifier that identifies a data resource which may be safely accessed by at most one server device at a time, query an activation database on the local network with the resource identifier to determine that the resource identifier is in a deactivated status, broadcast using the high latency network interface a broadcast request that includes the resource identifier, and update the activation status for the resource identifier in the database to an activated status for the local network.