invocation. The invoke activity, which calls the VeLabService. The execution has the result as given in Figure 12.56. The measurement read block: This block (Figure 12.57) is composed of three activities: An assigned activity which sets the input variables for the invocation of the VelabService. Service Delivery Platforms The invoke activity which calls the VeLabService. An assigned activity which copies the returned value by the VeLabService invocation into the output variable of the BPEL process. References 1. I. Szekely, F. Sandu, A.N. Balica, and D.N. Robu, Analysis of wireless measurement transmission performance. Proceedings of the 15th IMEKO TC 4 Symposium on Novelties in Electrical Measurements and Instrumentation, Iasi, Romania, September 19-21, 2007, ISSB/ISBN: 978-973-667-260-6, 978-973-667-262-0, selected for re-publication in extenso, as Performance measurement for mobile data streaming. F. Sandu, I. Szekely, D.N. Robu, A.N. Balica, Computer Standards and Interfaces-The International Journal on the Development and Application of Standards for Computers, Software Quality, Data Communications, Interfaces and Measurement, Elsevier Publications, ISSN: 0920-5489. 2. http://www.3gpp.org, 3gpp Specifications-23.107 Quality of Service (QoS) Concept and Architecture. 3. J. Eberspächer, H.J. Vögel, and C. Bettstetter, GSM Switching, Services, and Protocols, 2nd Edition, John Wiley & Sons, New York, NY, 2001, ISBN 047149903X. 4. J. Bannister, P. Mather, and S. Coope, Convergence Technologies for 3G Networks: IP, UMTS, EGPRS and ATM, John Wiley & Sons, New York, NY, 2004, ISBN 047086091X. 5. www.nokiasiemensnetworks.com 6. www.cisco.com 7. Z. Wu, J. Wu, D. Sun, and X. Wu, Remote measurement platform based on DataSocket and .NET framework, Proceedings of SPIE (the International Society for Optical Engineering), Vol. 6358, dedicated to the 6th International Symposium on Instrumentation and Control Technology: Sensors, Automatic Measurement, Control, and Computer Simulation, Beijing, China, 2006, http://www.spiedl.