00328nas a2200121   4500000000100000000000100001008004100002260004700043100003000090700002800120245004700148300001100195       2001                            d  csepbUniversitat Politècnica de Catalunya1 aJosé-M. Barceló-Ordinas1 aLlorenç Cerdà-Alabern00aGPRS Architecture and Service Descriptions  a1–44