Mobile communications for industrial applications - CERN

Possible applications with MOBICLinking of mobile communicationsinto existingWireless LAN components can be integratedwithout problem into existingEthernet LANs using an RJ45 connection.The RLM access point can be used forstand-alone operation, and is mainlyconnected to a wired Ethernet network.By connecting several RLMs, a wirelessnetwork is produced for mobile stations.When using several RLMs whose rangesoverlap, it can be guaranteed that communicationsto mobile stations remainspossible. This is achieved by passing onthe communications connection fromone access point to the next (roaming).Web-based network managementwith MOBIC and OSM/ESMNetwork management can be carriedout extremely conveniently with MOBICusing browsers. An RLM is connected toan existing Industrial Ethernet, e.g.using an optical switch module (OSM)or electrical switch module (ESM).The RLM implements the wireless communicationsto the MOBIC.The OSM or ESM has the following functionsfor network management:· Locally on the module:Via the CLI (Command Line Interface):serial interface and PC with terminalemulation· Remote via browser(Web-based management):Selection of OSM or ESM via thenetwork from a PC with browser· Remote via SNMP:Linking of OSM or ESM via thenetwork to a network managementstationFig. 4:For the mobileintranet/InternetaccessISDN-routerLinking of existing infrastructures with MOBICMobile networkmanagementstation withWeb browserRLMInternet access/intranet serverWireless LANRLMDP/EIB LinkS7-400 withCP 443-1 ITS7-300 withCP 343-1 ITApplet ofaddressedcomponentsStationary networkmanagement stationwith Web browserPCMCIA cardWireless LANAccess of managementstation tonetwork nodes to bemonitoredFig. 5:Web-based management with MOBIC and OSM5