Patent ID: 6542516
Filing Date: 2003-04-01
Classification: H04L,H04W

Abstract:
A method for realising data transmission between a mobile station (100) and a digital wireless data transmission system, said digital wireless data transmission system comprising a radio access network (104, 105, 106) processing messages according to a first protocol, and a core network (101, 102, 103) processing messages according to a second protocol said method comprising the steps ofhandling messages according to the first protocol in the mobile station according to a certain set of lower protocol layers (305), handling messages according to the second protocol in the mobile station according to a certain higher protocol layer (302, 303, 304), carrying out an adaptation by providing a separate protocol adaptation layer (301) between said higher protocol layer and said lower protocol layers, wherein said messages according to the first and second protocols are mapped into each other; and wherein said adaptation layer is arranged to emulate the operation of a certain previously defined set of lower protocol layers towards a certain previously defined higher protocol layer and to emulate the operation of a certain previously defined higher protocol layer towards a certain previously defined set of lower protocol layers.