Control system over wired/wireless network performance might be unstable due to packet loss which causes system inconstancy. To achieve optimized operation, finding a method to compensate to packet loss is significant awareness.
You're right that packet loss in wireless networks is more of an issue than it is with cabled networks. For this reason, IEEE 802.11 includes its own packet acknowledgment or retransmit protocol, at layer 2 (ARQ, or automatic repeat request), much as TCP does at layer 4. This is in addition to forward error correction schemes, such as Reed-Solomon and/or convolutional codes, that both wired and wireless networks would implement.
Which is why WiFi is not very good with IP multicast. The lower layer retries are incompatible with multicast, so they have to be disabled. Which leads to a relatively high level of missed packets.
http://superuser.com/questions/730288/why-do-some-wifi-routers-block-multicast-packets-going-from-wired-to-wireless
Another possible technique, to distribute IP multicast streams to WiFi nets, is to convert the multicast packets into unicast packets, at the wired network edge. The problem is being considered by the IETF mboned working group.
try to select the best network topology that covers your environment and select the best connection tools and protocols measuring RSSI between nodes and coordinators and routers (X-CTU software may help you to such that)
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