To maintain utmost compatibility with existing wired fieldlevel networks, it is advisable to adopt the strategy from industrial Ethernet
and use only the lower layers of the wireless technologies (these are the ones that are typically standardized, anyway)
The higher protocol layers could then be taken from wired field-level networks
Depending on the capabilities of the wireless technology and the requirements of the wired field-level protocol, the resulting protocol architecture can be different(seeFig.5),andtheendpointofthemigrationpathcan be anything between pure data object compatibility and tight integration of wireless links as extensions of a wired network