Migrating Legacy Waveforms                to the SCA                         20th October 2011Mike Williams and Vince Kova...
The Software Communications Architecture        2 The adoption of the SCA as a common software infrastructure for software...
SCA Waveform Portability                               3 The Dream   Waveform implementations would be reusable across   m...
The Problem…                                                4 The architecture and design of a Software Defined Radio has ...
General Waveform and Radio Design Flow                                                                                    ...
Platform v. Waveform Development                                                                                          ...
SCA Influence on WF and Radio Design                                                                                      ...
SCA Influence on WF and Radio Design                                                                                      ...
What are the aspects of waveform porting?    9 Adherence to the SCA promotes portability but does not guarantee it, i.e. i...
Source versus Target Radio Platforms                                                                                      ...
Source versus Target Radios                                                                                               ...
Source versus Target Radios                                                                                              1...
Source versus Target Radios                                                                                              1...
Source versus Target Radios                                                                                              1...
Source versus Target Radios                                                                                               ...
Source versus Target Radios                                                                                              1...
Source versus Target Radios                                                                                              1...
Many of the concerns remain the same…                                                                                     ...
Many of the concerns remain the same…                                                                                     ...
Platform-specific elements in the waveform                                                                                ...
Platform-specific elements in the waveform                                                                                ...
Platform-specific elements in the waveform                                                                                ...
Parameterizing Waveform Porting Effort                                                                                  23...
Reuse as a Cost Function                               24 The cost of the reuse is driven by the differences in the source...
Reuse Cost Curve*                                                                                                         ...
Waveform Network Layer Model                                                                               26             ...
Waveform Component Model                                                                                                  ...
Deployment Analysis                            28 Once the waveform and the constituent components have been logically mod...
Source Radio Waveform Deployment Model                                         29Presented in MILCOM Tutorial, “Waveform D...
Waveform Deployment Analysis                                                                   30                         ...
Processor Differences                           31 Mapping the source deployment components processors identifying any exi...
Waveform Deployment Analysis                                                                    322) Identify physical    ...
Transport Protocols and Data Paths               33 Identifying the physical connections between nodes, card assemblies an...
Waveform Deployment Analysis                                                                   342) Identify physical     ...
Deployment Analysis                          35 Specify current deployment information:   Processor type / model / memory ...
Waveform Deployment Analysis                                                                      362) Identify physical  ...
Logical Interfaces                                 37 Identify each pairwise set of interfaces between waveform components...
Summary                                               38 Porting a waveform is a superset of traditional, i.e. GPP, softwa...
SCA SDR Requires a Change in Mindset                                      39  Steve Jobs in Four Easy Steps  What the elec...
What’s Next…                                        40 Following sessions will discuss experience, approaches, techniques ...
Further Information                           41 For additional information on PrismTech’s Spectra products and services: ...
42Thank You Copyright PrismTech 2011
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Migrating Legacy Waveforms to the Software Communications Architecture (SCA)

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This PrismTech Spectra software defined radio (SDR) webcast will discuss some of the challenges facing the migration or porting of an existing waveform to an Software Communications Architecture (SCA) radio system.

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Migrating Legacy Waveforms to the Software Communications Architecture (SCA)

  1. 1. Migrating Legacy Waveforms to the SCA 20th October 2011Mike Williams and Vince KovarikPrismTech
  2. 2. The Software Communications Architecture 2 The adoption of the SCA as a common software infrastructure for software defined radios continues to grow. Porting an SCA waveform between two platforms is not necessarily a straightforward process. Migrating legacy, non-SCA waveforms to an SCA environment presents some additional challenges in making the existing waveform SCA compliant. Copyright PrismTech 2011
  3. 3. SCA Waveform Portability 3 The Dream Waveform implementations would be reusable across multiple radio systems. No modifications would be necessary to bring the waveform up on another system. The Reality Initially, SCA waveform implementations were not reusable. Extensive modifications were required. There seemed to be no correlation between use of the SCA and portability of the waveform. Copyright PrismTech 2011
  4. 4. The Problem… 4 The architecture and design of a Software Defined Radio has multiple perspectives: Processors GPP, DSP, FPGA Design Paradigms Sequential Stack State Machine v. Parallel State Machine Implementation Languages C/C++, HDL, SystemC Systems Engineering Hardware and software engineering architecture tasks are performed semi-independently of each other. Copyright PrismTech 2011
  5. 5. General Waveform and Radio Design Flow 5analysis Wav eform Dev elopment Waveform Radio Modeling and simulation of Requirements specification core waveform algorithms guide and analysis. Initial hardware in MATLAB, SIMULINK, «flow» architecture, processor types, Mathematica, System Platform Waveform «flow» identify performance and form View, etc. «flow» Requirements Requirements factor constraints Functional Block Grouping of algorithm Algorithm Achitecture elements into logical Development Make / buy tradeoff waveform components. analyses, preliminary Use of UML component hardware prototype, basic modeling techniques and electrical design, power tools. Functional Block budget, etc. Architecture Hardware Selection Non-real-time implementation in C/C++ Functionally equivalent engineering MATLAB, SIMULINK, Formal qualifications prototype (not to form factor), develop final Prototype Bill of Materials (BOM). Base platform Mathematica, testing, air interface Waveform software implemented, e.g. device drivers, SystemView, etc. testing by regulatory Engineering board support packages, SCA body, e.g. Joint Prototype Interoperability Test infrastructure software including SCA Allocation of functional devices and services. waveform components to a Deployment Command (JITC) for JTRS processor type: GPP, Allocation radios. DSP, FPGA, GPU, etc. Integrated Air interface compliance, RF System Testing Form Factor performance, error rates, Target language selection, Code Design and Implementation real-time prototyping, Development throughput, etc. detailed design and implementation. Implement SCA waveform component architecture. system level verification, test and integration. Manufacturing «process» Copyright PrismTech 2011
  6. 6. Platform v. Waveform Development 6analysis Wav eform Dev elopment Waveform Radio Modeling and simulation of Requirements specification core waveform algorithms guide and analysis. Initial hardware in MATLAB, SIMULINK, «flow» architecture, processor types, Mathematica, System Platform Waveform «flow» identify performance and form View, etc. «flow» Requirements Requirements factor constraints Functional Block Grouping of algorithm Algorithm Achitecture elements into logical Development Make / buy tradeoff waveform components. analyses, preliminary Use of UML component hardware prototype, basic modeling techniques and electrical design, power tools. Functional Block budget, etc. Architecture Hardware Selection Non-real-time implementation in C/C++ Functionally equivalent engineering MATLAB, SIMULINK, Formal qualifications prototype (not to form factor), develop final Prototype Bill of Materials (BOM). Base platform Mathematica, testing, air interface Waveform software implemented, e.g. device drivers, SystemView, etc. testing by regulatory Engineering board support packages, SCA body, e.g. Joint Prototype Interoperability Test infrastructure software including SCA Allocation of functional devices and services. waveform components to a Deployment Command (JITC) for JTRS processor type: GPP, Allocation radios. DSP, FPGA, GPU, etc. Integrated Air interface compliance, RF System Testing Form Factor performance, error rates, Target language selection, Code Design and Implementation real-time prototyping, Development throughput, etc. detailed design and implementation. Implement SCA waveform component architecture. system level verification, test and integration. Manufacturing «process» As a organization becomes proficient using the SCA, there is a tendency to evolve towards an organizational model built around a Platform (radio) team and a Waveform (application) team. Copyright PrismTech 2011
  7. 7. SCA Influence on WF and Radio Design 7analysis Wav eform Dev elopment Waveform Radio Modeling and simulation of Requirements specification core waveform algorithms guide and analysis. Initial hardware in MATLAB, SIMULINK, «flow» architecture, processor types, Mathematica, System Platform Waveform «flow» identify performance and form View, etc. «flow» Requirements Requirements factor constraints Functional Block Grouping of algorithm Algorithm Achitecture elements into logical Development Make / buy tradeoff waveform components. analyses, preliminary Use of UML component hardware prototype, basic modeling techniques and electrical design, power tools. Functional Block budget, etc. Architecture Hardware Selection Non-real-time implementation in C/C++ Functionally equivalent engineering MATLAB, SIMULINK, Formal qualifications prototype (not to form factor), develop final Prototype Bill of Materials (BOM). Base platform Mathematica, testing, air interface Waveform software implemented, e.g. device drivers, SystemView, etc. testing by regulatory Engineering board support packages, SCA body, e.g. Joint Prototype Interoperability Test infrastructure software including SCA Allocation of functional devices and services. waveform components to a Deployment Command (JITC) for JTRS processor type: GPP, Allocation radios. DSP, FPGA, GPU, etc. Integrated Air interface compliance, RF System Testing Form Factor performance, error rates, Target language selection, Code Design and Implementation real-time prototyping, Development throughput, etc. detailed design and implementation. Implement SCA waveform component architecture. system level verification, test and integration. Insertion points for SCA implementation however…. Manufacturing «process» Copyright PrismTech 2011
  8. 8. SCA Influence on WF and Radio Design 8 … the SCA must be factoredanalysis Wav eform Dev elopment Waveform the radio and waveform into Radio Modeling and simulation of Requirements specification core waveform algorithms in MATLAB, SIMULINK, process before architecture«flow» guide and analysis. Initial hardware architecture, processor types, Mathematica, System the insertion points. Platform «flow» Waveform «flow» identify performance and form View, etc. Requirements Requirements factor constraints Functional Block Grouping of algorithm Algorithm Achitecture elements into logical Development Make / buy tradeoff waveform components. analyses, preliminary Use of UML component hardware prototype, basic modeling techniques and electrical design, power tools. Functional Block budget, etc. Architecture Hardware Selection Non-real-time implementation in C/C++ Functionally equivalent engineering MATLAB, SIMULINK, Formal qualifications prototype (not to form factor), develop final Prototype Bill of Materials (BOM). Base platform Mathematica, testing, air interface Waveform software implemented, e.g. device drivers, SystemView, etc. testing by regulatory Engineering board support packages, SCA body, e.g. Joint Prototype Interoperability Test infrastructure software including SCA Allocation of functional devices and services. waveform components to a Deployment Command (JITC) for JTRS processor type: GPP, Allocation radios. DSP, FPGA, GPU, etc. Integrated Air interface compliance, RF System Testing Form Factor performance, error rates, Target language selection, Code Design and Implementation real-time prototyping, Development throughput, etc. detailed design and implementation. Implement SCA waveform component architecture. system level verification, test and integration. Insertion points for SCA implementation however …. Manufacturing «process» Copyright PrismTech 2011
  9. 9. What are the aspects of waveform porting? 9 Adherence to the SCA promotes portability but does not guarantee it, i.e. it is necessary but not sufficient. Hardware abstraction is insufficient. Migrating non-SCA legacy waveforms to an SCA environment presents some additional challenges. Let’s start by looking at porting an SCA- compliant waveform from one SCA radio to another. Copyright PrismTech 2011
  10. 10. Source versus Target Radio Platforms 10analysis Wav eform Dev elopment analysis Wav eform Dev elopment Waveform Radio «flow» Waveform Platform Requirements «flow» Requirements Algorithm Development Functional Block Achitecture Functional Block Waveform developed and Architecture then integrated with an Hardware SCA compliant radio. Selection Prototype Waveform Target radio may have a Engineering Prototype Deployment Allocation different implementation of the SCA, hardware Integrated System Testing architecture, memory, etc. Code Design and Integrated Development System Testing Form Factor Implementation Manufacturing SCA waveform «process» Manufacturing «process» SCA radio Copyright PrismTech 2011
  11. 11. Source versus Target Radios 11analysis Wav eform Dev elopment analy W sis aveformDevelopment Waveform Radio «flow» Waveform Platorm f Requirements «flow» Requirement s Algorithm Development Functional Block Achitecture Functional Block Architecture Hardware Selection Prototype Waveform Engineering Prototype Deployment Allocation Integrated Code Design and System Testing Integrated Development Sys Tes tem ting Form Factor Implementation Port Manufacturing SCA waveform «process» Manufacturing «process» SCA radio Copyright PrismTech 2011
  12. 12. Source versus Target Radios 12analysis Wav eform Dev elopment 1) What are the processor differences? Wav eform Dev elopment analysis Waveform Impacts development tools and design Radio and potentially deployment. «flow» Waveform Platform Requirements «flow» Requirements Algorithm Development Functional Block Achitecture Functional Block Architecture Hardware Selection Prototype Waveform Engineering Prototype Deployment Allocation Integrated Code Design and System Testing Integrated Development System Testing Form Factor Implementation Port Manufacturing SCA waveform «process» Manufacturing «process» SCA radio Copyright PrismTech 2011
  13. 13. Source versus Target Radios 13analysis Wav eform Dev elopment 1) What are the processor differences? Wav eform Dev elopment analysis Waveform Impacts development tools and design Radio and potentially deployment. «flow» Waveform Platform Requirements «flow» Requirements Algorithm 2) What are the physical transports? Functional Block Development Impacts drivers and BSPs for Achitecture middleware transports. Functional Block Architecture Hardware Selection Prototype Waveform Engineering Prototype Deployment Allocation Integrated Code Design and System Testing Integrated Development System Testing Form Factor Implementation Port Manufacturing SCA waveform «process» Manufacturing «process» SCA radio Copyright PrismTech 2011
  14. 14. Source versus Target Radios 14analysis Wav eform Dev elopment 1) What are the processor differences? Wav eform Dev elopment analysis Waveform Impacts development tools and design Radio and potentially deployment. «flow» Waveform Platform Requirements «flow» Requirements Algorithm 2) What are the physical transports? Functional Block Development Impacts drivers and BSPs for Achitecture middleware transports. Functional Block Architecture 3) What is the hardware abstraction level? Hardware Impacts waveform deployment model and Selection Prototype configuration and control. Waveform Engineering Prototype Deployment Allocation Integrated Code Design and System Testing Integrated Development System Testing Form Factor Implementation Port Manufacturing SCA waveform «process» Manufacturing «process» SCA radio Copyright PrismTech 2011
  15. 15. Source versus Target Radios 15analysis Wav eform Dev elopment 1) What are the processor differences?analysis Wav eform Dev elopment Waveform Impacts development tools and design Radio and potentially deployment. «flow» Waveform Platform Requirements «flow» Requirements Algorithm 2) What are the physical transports? Functional Block Development Impacts drivers and BSPs for Achitecture middleware transports. Functional Block Architecture 3) What is the hardware abstraction level? Hardware Impacts waveform deployment model and Selection Prototype configuration and control. Waveform 4) How modular is the waveform design? Engineering Impacts rebuilding for new processors and Prototype Deployment Allocation refactoring control and I/O code out of functions Integrated Code Design and System Testing Integrated Development System Testing Form Factor Implementation Port Manufacturing SCA waveform «process» Manufacturing «process» SCA radio Copyright PrismTech 2011
  16. 16. Source versus Target Radios 16analysis Wav eform Dev elopment 1) What are the processor differences? Wav eform Dev elopment analysis Waveform Impacts development tools and design and Radio potentially deployment. «flow» Waveform Platform Requirements «flow» Requirements Algorithm 2) What are the physical transports? Functional Block Development Impacts drivers and BSPs for Achitecture middleware transports. Functional Block Architecture 3) What is the hardware abstraction level? Hardware Impacts waveform deployment model and Selection Prototype configuration and control. Waveform 4) How modular is the waveform design? Engineering Impacts rebuilding for new processors and Prototype Deployment Allocation refactoring control and I/O code out of functions Integrated Code Design and System Testing Integrated Development System Testing Form Factor Implementation Port Differences in the radio hardware Manufacturing SCA waveform «process» architecture (2) and degree detail in the Manufacturing «process» SCA radio SCA model of the hardware (3) can have a significant impact on the time and cost Copyright PrismTech 2011 required to port the waveform.
  17. 17. Source versus Target Radios 17analysis Wav eform Dev elopment 1) What are the processor differences? Wav eform Dev elopment analysis Waveform Impacts development tools and design and Radio potentially deployment. «flow» Waveform Platform Requirements «flow» Requirements Algorithm 2) What are the physical transports? Functional Block Development Impacts drivers and BSPs for Achitecture middleware transports. Functional Block Architecture 3) What is the hardware abstraction level? Hardware Impacts waveform deployment model and Selection Prototype configuration and control. Waveform 4) How modular is the waveform design? Engineering Impacts rebuilding for new processors and Prototype Deployment Allocation refactoring control and I/O code out of functions Integrated Code Design and System Testing Integrated Development System Testing Form Factor Implementation Port Differences in the radio hardware Manufacturing SCA waveform «process» architecture (2) and degree detail in the Manufacturing «process» SCA radio SCA model of the hardware (3) can have a significant impact on the time and cost Copyright PrismTech 2011 required to port the waveform.
  18. 18. Many of the concerns remain the same… 18analysis Wav eform Dev elopment 1) What are the processor differences? Wav eform Dev elopment analysis Waveform Impacts development tools and design and Radio potentially deployment. «flow» Waveform Platform «flow» Requirements Requirements 2) What are the physical transports? Algorithm Functional Block Development Impacts drivers and BSPs for Achitecture middleware transports. Functional Block Architecture 3) What is the hardware abstraction level? Hardware Impacts waveform deployment model and Selection configuration and control. Prototype Waveform 4) How modular is the waveform design? Engineering Impacts rebuilding for new processors and Prototype Deployment Allocation refactoring control and I/O code out of functions Code Design and Integrated System Testing Form Factor Development Implementation Manufacturing «process» SCA radio Copyright PrismTech 2011
  19. 19. Many of the concerns remain the same… 19analysis Wav eform Dev elopment 1) What are the processor differences? Wav eform Dev elopment analysis Waveform Impacts development tools and design and Radio potentially deployment. «flow» Waveform Platform «flow» Requirements Requirements 2) What are the physical transports? Algorithm Functional Block Development Impacts drivers and BSPs for Achitecture middleware transports. Functional Block Architecture 3) What is the hardware abstraction level? Hardware Impacts waveform deployment model and Selection configuration and control. Prototype Waveform 4) How modular is the waveform design? Engineering Impacts rebuilding for new processors and Prototype Deployment Allocation refactoring control and I/O code out of functions Code Design and Integrated System Testing Form Factor Development Implementation Manufacturing «process» SCA radio Copyright PrismTech 2011
  20. 20. Platform-specific elements in the waveform 20analysis Wav eform Dev elopment 1) What are the processor differences? Wav eform Dev elopment analysis Waveform Impacts development tools and design and Radio potentially deployment. «flow» Waveform Platform «flow» Requirements Requirements 2) What are the physical transports? Algorithm Functional Block Development Impacts drivers and BSPs for Achitecture middleware transports. Functional Block Architecture 3) What is the hardware abstraction level? Hardware Impacts waveform deployment model and Selection configuration and control. Prototype Waveform 4) How modular is the waveform design? Engineering Impacts rebuilding for new processors and Prototype Deployment Allocation refactoring control and I/O code out of functions Code Design and 5) What is the existing logical protocol? Integrated System Testing Form Factor Development Effort required to move from a POSIX queue, as Implementation an example, to CORBA. Manufacturing «process» SCA radio Copyright PrismTech 2011
  21. 21. Platform-specific elements in the waveform 21analysis Wav eform Dev elopment 1) What are the processor differences? Wav eform Dev elopment analysis Waveform Impacts development tools and design and Radio potentially deployment. «flow» Waveform Platform «flow» Requirements Requirements 2) What are the physical transports? Algorithm Functional Block Development Impacts drivers and BSPs for Achitecture middleware transports. Functional Block Architecture 3) What is the hardware abstraction level? Hardware Impacts waveform deployment model and Selection configuration and control. Prototype Waveform 4) How modular is the waveform design? Engineering Impacts rebuilding for new processors and Prototype Deployment Allocation refactoring control and I/O code out of functions 5) What is the existing logical protocol? Integrated Code Design and Development Effort required to move from a POSIX queue, as System Testing Form Factor Implementation an example, to CORBA. 6) What is the implementation language(s)? Impact if the waveform is in a different language than the language used for the target radio, e.g. a mix of C/C++ may require multiple ORB libraries, encapsulation strategies, etc. Manufacturing «process» SCA radio Copyright PrismTech 2011
  22. 22. Platform-specific elements in the waveform 22 analysis Wav eform Dev elopment 1) What are the processor differences? Wav eform Dev elopment analysis Waveform Impacts development tools and design and Radio potentially deployment. «flow» Waveform Platform «flow» Requirements Requirements 2) What are the physical transports? Algorithm Functional Block Development Impacts drivers and BSPs for Achitecture middleware transports. Functional Block Architecture 3) What is the hardware abstraction level? Hardware Impacts waveform deployment model and Selection configuration and control. Prototype Waveform 4) How modular is the waveform design? Engineering Impacts rebuilding for new processors and Prototype Deployment Allocation refactoring control and I/O code out of functions 5) What is the existing logical protocol? Integrated Code Design and Development Effort required to move from a POSIX queue, as System Testing Form Factor Implementation an example, to CORBA. 6) What is the implementation language(s)? Impact if the waveform is in a different language than the language used for the target radio, e.g. a mix of C/C++ may require multiple ORB libraries, encapsulation strategies, etc. Manufacturing «process» SCA radio 7) What dependencies exist for OS and services?Access to operating system calls in SCA is limited and services implemented Copyright PrismTech 2011 on the source radio may not exist on the target radio.
  23. 23. Parameterizing Waveform Porting Effort 23• Radio architecture differences impact waveform porting effort in three areas*: – Control – Change in control and synchronization of waveform components – I/O – Change of data paths and transports Source $$$?? Target – Processor – Change in algorithm Modifying the I/O and Control differences between the source Processor change and target systems are Control Architecture  ($) often the biggest cost DSP FPGA driver. Model the waveform, FPGA the deployment, the DSP I/O and Control target radio hardware changes between and asses the deltas. source and target GPP GPP ($$$) *The underlying assumption is that the functional design of the waveform is not Processor Architecture  modified Copyright PrismTech 2011
  24. 24. Reuse as a Cost Function 24 The cost of the reuse is driven by the differences in the source and target platforms: Processor – Algorithms, Waveform Design, Control I/O – Physical bus, Data Marshalling, buffers Control – Timing, Interrupts, Flow Reuse does not imply zero cost. If reuse of a waveform is viewed as a cost function, can the advances in software cost modeling over the past 25 years be applied. Copyright PrismTech 2011
  25. 25. Reuse Cost Curve* 25 Relative Cost 1.0 Cost increases 1.0 Roughly 55% of the cost of moderately up development is attributable about 75% of code to reuse of approximately change. 13% of the code!0.75 0.70 0.55 0.5 There is roughly a 5% The initial assumption was that cost of reuse when no there would be a (roughly) linear changes are made! relationship between the relative cost and the percentage of code modified.0.25 *(Selby 85) analyzed the cost of reuse at NASA. Approximately 3,000 software modules were included in the analysis.0.046 0.25 0.5 0.75 1.0 Percent Modified Copyright PrismTech 2011
  26. 26. Waveform Network Layer Model 26 FM3TR Network Layers Layer model provides data_in data_out a view from the air A/D boundary at the data_in Nwk data_out PHY layer to the Layer 3 Hci nwk hci network layer. in_from_dlc out_to_dlc Much of the in_from_nwk waveform processing Layer 2 Dlc out_to_nwk dlc hci can be performed in rx_from_mac tx_to_mac high-level languages on GPP or DSP tx_from_dlc rx_to_dlc Mac mac hci rx_from_phl tc_to_phl carrier_detect PHY layer typically Layer 1 ends up on an FPGA for more complex tx rx Phy waveforms, e.g. phl hci carrier_detect antenna Wideband Network antenna voice_in Waveform (WNW) voice_out voice_in Copyright PrismTech 2011 voice_out
  27. 27. Waveform Component Model 27 External Layer FM3TR PHY Layer interfaces define primary boundary «block» between components «block» Phy::Cd Phy::HCI HCI input/output t_cd_on detect carrier detect hci t_cd_on out to Mac t_cd_off tx_inc t_cd_off config carrier rx_inc data_in data_out data_in data_out crc_incLayer 3 Nwk Hci nwk hci in_from_dlc out_to_dlc in_from_nwk tx in from MacLayer 2 Dlc out_to_nwk dlc hci rx_from_mac tx_to_mac tx_from_dlc Mac rx_to_dlc «block» mac hci Phy::Rx rx_from_phl tc_to_phl «block» carrier_detectLayer 1 Phy::Tx rx_inc rx phl tx hci Phy carrier_detect in tx_inc crc_inc antenna antenna in voice_in out voice_out out rx out to Mac voice_in voice_out «block» Phy::Fsm «block» config carrier Phy::TransSec tx rx trans_sec trans_sec voice_out Internal layer analog voice out «block» interfaces may be API «block» Phy::Radio RF to/from antenna Phy::Ptt rf_freq rf_freq calls or a message analog voice_in voice_out rf_out rf_out antenna voice_in rf_in passing protocol voice in reset rf_in reset Each layer has some level of finite state machine Copyright PrismTech 2011 implementation
  28. 28. Deployment Analysis 28 Once the waveform and the constituent components have been logically modeled, build a deployment model of the waveform for the existing implementation. The objective is to identify the deployment dependencies related to processors, physical transports and logical interfaces. This provides a baseline for identifying changes required to port to the new platform. Copyright PrismTech 2011
  29. 29. Source Radio Waveform Deployment Model 29Presented in MILCOM Tutorial, “Waveform Development and Deployment with the SCA” Copyright PrismTech 2011© 2007 Harris, Zeligsoft, and Spectrum Signal Processing
  30. 30. Waveform Deployment Analysis 30 1) Identify nodes, assemblies and processor blocks.Presented in MILCOM Tutorial, “Waveform Development and Deployment with the SCA” Copyright PrismTech 2011© 2007 Harris, Zeligsoft, and Spectrum Signal Processing
  31. 31. Processor Differences 31 Mapping the source deployment components processors identifying any existing dependencies on processor types, operating systems and performance./ This provides the initial starting point for identifying and assessing porting effort for the functional components of the waveform. Copyright PrismTech 2011
  32. 32. Waveform Deployment Analysis 322) Identify physical 1) Identify interfaces nodes, assemblies and processor blocks.Presented in MILCOM Tutorial, “Waveform Development and Deployment with the SCA” Copyright PrismTech 2011© 2007 Harris, Zeligsoft, and Spectrum Signal Processing
  33. 33. Transport Protocols and Data Paths 33 Identifying the physical connections between nodes, card assemblies and processors delineates the physical transports and transports. This provides a baseline for comparison to the target radio platform for identifying the differences between the source and target machines. Copyright PrismTech 2011
  34. 34. Waveform Deployment Analysis 342) Identify physical 1) Identify nodes, interfaces assemblies and processor blocks. 3) Identify mapping of waveform components to hardware elements.Presented in MILCOM Tutorial, “Waveform Development and Deployment with the SCA” Copyright PrismTech 2011© 2007 Harris, Zeligsoft, and Spectrum Signal Processing
  35. 35. Deployment Analysis 35 Specify current deployment information: Processor type / model / memory / mips Implementation language Operating system (if applicable) Identify other dependencies Libraries and version COTS packages (including IP cores on FPGA) Copyright PrismTech 2011
  36. 36. Waveform Deployment Analysis 362) Identify physical 1) Identify nodes, interfaces assemblies and processor blocks. 3) Identify mapping of 4) Identify logical waveform components to interfaces between hardware elements. waveform components.Presented in MILCOM Tutorial, “Waveform Development and Deployment with the SCA” Copyright PrismTech 2011© 2007 Harris, Zeligsoft, and Spectrum Signal Processing
  37. 37. Logical Interfaces 37 Identify each pairwise set of interfaces between waveform components Describe interface: Call direction (Uses / Provides port in SCA) Synchronization (function return, delivery only) Content of call (parameters, description) Build a map of dependencies (N2 chart, sequence diagram) Identify performance critical areas Copyright PrismTech 2011
  38. 38. Summary 38 Porting a waveform is a superset of traditional, i.e. GPP, software porting. Lack of an industry standard for signal processing hardware, e.g. standard protocols and hardware abstractions, introduce complexities requiring more detailed analysis. Similar to traditional software cost estimation, factors such as the level of experience the target SDR radio and the existing waveform code reduce porting effort and cost. Although a complex problem, it is not intractable. Copyright PrismTech 2011
  39. 39. SCA SDR Requires a Change in Mindset 39 Steve Jobs in Four Easy Steps What the electronics industry can learn from his tenure at Apple By G. Pascal Zachary / October 2011 “Jobs refused to accept that software and hardware were best designed and engineered separately. For him, the venerable insight summarized by Thomas Hughes, the grand historian of American technology, as `the system must be first’ became a lodestar.” The Inmates Are Running the Asylum: Why High-Tech Products Drive Us Crazy and How to Restore the Sanity Alan Cooper / 1999 Question: “What do you get when you cross a camera with a computer?” Answer: “A computer!” “We don’t build radios anymore. We build computers that transmit.” - Mark Turner, Harris Copyright PrismTech 2011
  40. 40. What’s Next… 40 Following sessions will discuss experience, approaches, techniques and tools with respect to: Modeling waveform software architecture Potential for reverse engineering to assist in the process Deployment analysis to provide a “quick look” assessment of complexity and potential effort. Copyright PrismTech 2011
  41. 41. Further Information 41 For additional information on PrismTech’s Spectra products and services: E-mail: info@prismtech.com Website: www.prismtech.com/spectra Copyright PrismTech 2011
  42. 42. 42Thank You Copyright PrismTech 2011

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