it), and a Data Center (SGSN-Serving GPRS Support Node and a GGSN-Gateway GPRS Support Node from CISCO, [6]). Both the probe and the client can be fixed or mobile, local or remote (see the configurations of Figures 12.2 and 12.3). Different scenarios can be imagined, with mobile units under test (e.g., vehicles, patients) having attached data loggers and transmitters and/or mobile surveillance-diagnose-intervention teams, and SO on. From the measurement point of view, the authors considered the state-of-the- art in the field of remote measurement and distributed measurement systems rely- ing on wireless telecommunications networks. Previous literature presented different remote measurement platforms and dis- tributed configurations (networked devices as well as distributed databases and even distributed processing). Specific transfer protocols can be implemented on Microsoft NET [7] or other frameworks. General purpose data sockets can be used GSM/GPRS MSC D900/ BS240 CMX-3500 UMTS (3G) Internet (CPG-3300) CISCO 7200 Node B RNC 750 CPX-5000 Figure 12.1 The testing environment with Siemens PLMN equipment (including a GGSN from CISCO). Service Delivery Platforms 1. LabVIEW Down link 1. LabVIEW receiving DAQ/Sim 2. Repress data in 2. LabVIEW labVIEW transmission GSM BSS EIR HIR AUC PCS-500 Digital Station/PC RS232/USB Mobile Workbench/PC DAQ oscilloscope UTRAN Core network Internet 1. LabVIEW Up link 1. LabVIEW DAQ/Sim receiving 2. LabVIEW 2. Repress transmission data in labVIEW GSM BSS PCS-500 Digital HER AUC oscilloscope Workbench/PC RS232/USB Mobile Station/PC UTRAN Core network Internet Figure 12.2 Scenarios for remote measurement over PLMN: (a) with DL (down link) transmission; (b) with UL (up link) transmission. or proprietary solutions, for example, DataSocket Transfer Protocol "DSTP" [8], an application-layer protocol (implemented on top of TCP) for high-speed real- time mass data sharing [8] via the dedicated port 3015. As DSTP support was not extended for all "handhelds," they were considered other solutio