Feasibility of an Automatic Data Flow Centric Design Trajectory for SDR
Y Yi Wang · TU/e Research Portal · 2013
Modem design faces the challenge of handling multi-radio and multi-standard applications with real time requirements simultaneously on a heterogeneous multiprocessor platform. In ST-Ericssion, a project is being carried out to study analysis methods based on data flow to model both the wireless communication applications and the heterogeneous hardware platform onto which such applications are mapped. In this thesis, a LTE DL application is described in SysML, Dynamic Data Flow (DDF) and Mode Controlled Data Flow (MCDF) for different purposes. Firstly, the LTE DL application is built with SysML and is mapped on a heterogeneous multiprocessor platform according to the LTE standards as reference. Afterwards it is extended to Dual SIM Dual Call model to explore the relation between applications and hardware resources. The model described by SysML lacks analytical features and is not suitable for data flow analysis. Therefore we replace SysML with CAL, a data flow language, to re-express the LTE DL application. The LTE DL application is first converted from SysML to CAL straightforwardly to demonstrate the feasibility of conversion. It is considered as a DDF with limited analytical properties. The conversion rules are summarized for the development of automatic conversion tools. After that, MCDF, a data flow model which has enough expressiveness and analytical properties, is used to express the LTE DL DDF application with CAL. We create two structures with basic actors in MCDF to solve the problems of internal state sharing and data accumulation. Finally, we get the LTE DL model in MCDF from which the temporal properties can be analyzed.