A wireless infrastructure node (110a, 110b, 210a-210n, 510) suitable for being one of a plurality of pooled infrastructure nodes to be shared among a plurality of logical wireless field device networks WFN's (501a-501n), said wireless infrastructure node comprising: at least one processing device configured to: receive a data packet from a wireless field device network controller (120, 203a-203n, 503a-503n), the data packet including a wireless field network identifier, 'WFNID'; determine a field device network (220a-220n, 520a-520n) to receive the data packet based on the WFNID; transmit the data packet to a field device (112a-112e, 204, 205, 504) in the field device network; wherein the wireless infrastructure nodes transparently route data packets from the field device network 520a-520n to the intended WFN controller 503a-503n, and vice versa based on one or more packet identifiers associated with each data packet, each wireless infrastructure node 502 having one or more security keys for each logical WFN that is associated with the plurality of logical WFNs, wherein the one or more packet identifiers associated with each data packet include a WFNID; and wherein the wireless infrastructure node is one of a plurality of pooled infrastructure nodes configured to communicate between a plurality of WFN controllers and a plurality of field device networks arranged in the plurality of logical WFNs, wherein one or more additional wireless infrastructure nodes are added to the pool of multiple shared infrastructure nodes when data packet traffic exceeds an overall capacity of the pooled infrastructure nodes. at least one processing device configured to: receive a data packet from a wireless field device network controller (120, 203a-203n, 503a-503n), the data packet including a wireless field network identifier, 'WFNID'; determine a field device network (220a-220n, 520a-520n) to receive the data packet based on the WFNID; transmit the data packet to a field device (112a-112e, 204, 205, 504) in the field device network; receive a data packet from a wireless field device network controller (120, 203a-203n, 503a-503n), the data packet including a wireless field network identifier, 'WFNID'; determine a field device network (220a-220n, 520a-520n) to receive the data packet based on the WFNID; transmit the data packet to a field device (112a-112e, 204, 205, 504) in the field device network; wherein the wireless infrastructure nodes transparently route data packets from the field device network 520a-520n to the intended WFN controller 503a-503n, and vice versa based on one or more packet identifiers associated with each data packet, each wireless infrastructure node 502 having one or more security keys for each logical WFN that is associated with the plurality of logical WFNs, wherein the one or more packet identifiers associated with each data packet include a WFNID; and wherein the wireless infrastructure node is one of a plurality of pooled infrastructure nodes configured to communicate between a plurality of WFN controllers and a plurality of field device networks arranged in the plurality of logical WFNs, wherein one or more additional wireless infrastructure nodes are added to the pool of multiple shared infrastructure nodes when data packet traffic exceeds an overall capacity of the pooled infrastructure nodes.