On the interplay of aspects and dynamic reconfiguration in. Software reconfiguration patterns for dynamic evolution of. Dynamic software product lines dspls 6,7 allow managing both variability and dynamic software adaptation, so they can be considered a key technology in successfully developing selfprotected wsns applications. Dynamic reconfiguration oracle vm server for sparc 3. Nancy kirupanithi school of computing science, hindustan university, chennai dynamic reconfiguration is a synonym of runtime abstract dynamic reconfiguration technique is introduced to maintain quality of service, which is meant to. The paper focuses on the mapping of adllevel specifications to runtime instantiations and on the necessary runtime support for causallyconnected dynamic reconfiguration.
An architectural approach to ensure globally consistent dynamic reconfiguration of componentbased systems. Gomaa and hussein 21 have developed several software reconfiguration patterns for dynamic evolution of software architectures. Dynamic evolution and reconfiguration of software architectures through aspects. This means, for example, that you can change resources on an ncp without deactivating the ncp. The configuration is controlled by the contents of registers. On the interplay of aspects and dynamic reconfiguration in a specificationtodeployment environment. Intuitively, the slower the rate of reconfiguration the smaller the energy consumption as the associated energy cost of reconfiguration are amortised over a longer period of time. Runtime variability for dynamic reconfiguration in wireless. Existing work with dynamic architecture tends toward concrete architectures and runtime reconfiguration of the software implementation. Dynamic reconfiguration traditionally, reconfiguration takes place during maintenance or when a new version of the system is installed. This software must ensure that cps withstand changes and disruptions with acceptable and only temporary impact on their provided services, often through the dynamic reconfiguration of their architectures and replanning of their actions. Componentbased approaches generalize basic objectoriented implementations by allowing large collections of objects to. Hence, a constituent can be part of an sos for a finite period of time, contributing to the. This process ensures that each design block can be compiled and.
Adls permit analysis of architectures completeness, consistency, ambiguity, and performance adls can support automatic generation of software systems the negatives there is no universal agreement on what adls should represent, particularly as regards the behavior of the architecture. The idea of a more flexible and dynamic infrastructure makes sense, but what if resources are needed for a shortterm project or to meet peaks in demand. The dynamic reconfiguration functionality does not limit operation concurrency, does not require client operations to be stopped during reconfigurations, has a very simple interface for administrators and no added complexity to other client operations. This thesis is brought to you for free and open access by the engineering etds at unm digital repository. Framework for dynamic architecture reconfiguration of. The dynamic reconfiguration of software architectures has to be supported in order to enable their architectural element instances and their links to be created and destroyed at runtime. While most radios allow variation of parameters such as carrier frequency, an sdr enables largescale reconfiguration e. Download for offline reading, highlight, bookmark or take notes while you read partial reconfiguration on fpgas. A framework for dynamic architecture reconfiguration that properly combines modeldriven and software adaptation techniques represents an important step towards the incremental and dynamic deployment of cloud services into existing cloud service architectures. Dynamic architectures exhibit a property called dynamic reconfiguration, i. Modelling dynamic software architectures using typed graph. Port to read and write the fpga configuration at run time.
However, as traditional software product line architectures fail to provide mechanisms for runtime adaptation and behavior of products, there is a shift toward designing more dynamic software architectures and building more adaptable software able to handle autonomous decisionmaking, according to varying conditions. Serviceoriented architecture for command and control systems. Dynamic reconfiguration of software architectures 16 is a term that is used to refer, generally, to those changes that are produced in the topology of a composite system at runtime, by. An elegant example of this type of dynamic architecture is. Our strategy differs from earlier work in the area by blending aspects and architecture. Multiple changes can be done using a single reconfiguration command. A uml rulebased approach for describing and checking. Introduction over the last years software architectures are. Mar 01, 2011 our work defines a design approach to build reconfigurable software architectures, a key issue in the development of selfmanaged software architectures. Highspeed dynamic partial reconfiguration for field.
Cognitive functions arise from the coordination of largescale brain networks. Dynamic reconfiguration is the action of modifying a software system at runtime. Dynamic sdr reconfiguration through waveform application management is an attractive option in operational scenarios where the enhanced flexibility outweighs the cost in overhead, which varies depending on the sdr architecture and its implementation. Self reconfiguration is a special form of dynamic reconfiguration 14 and can be defined as the capability of a device to change its internal structure under the direct control of a user application.
An overview of dynamic software product line architectures. Dynamic reconfiguration of software architectures through aspects. A survey of architectures, methods, and applications kizheppatt vipin, nazarbayev university, kazakhstan suhaib a. Partial reconfiguration aims to allow part of the device to be reprogrammed while another part is still performing active computation. Fahmy, university of warwick, united kingdom dynamic and partial reconfiguration are key differentiating capabilities of field programmable gate arrays. This challenge is even greater when there are autonomous composite components which also need reconfiguration capabilities to evolve their internal compositions.
Therefore, additional experimental work using realworld sdnbased wireless testbeds, together with proper performance evaluation of key reconfiguration aspects, is necessary, in order to understand and quantify the benefits of sdn for the dynamic backhaul reconfiguration. Dynamic reconfiguration of software architectures through. Currently, most software systems have a dynamic nature and evolve at runtime. Dynamic reconfiguration is changing the hardware configuration of a psoc chip onthefly during program operation. Citeseerx document details isaac councill, lee giles, pradeep teregowda. We propose to investigate and design an interactive and practical environment called nvision for modeling, simulation, dynamic reconfiguration, evaluation and visualization of software and system architectures for performance and reliability. Currently, most software systems have a dynamic nature and need to evolve at runtime. Architectures, tools and applications ebook written by dirk koch. Runtime variability for dynamic reconfiguration in. Increasing design functionality with partial and dynamic reconfiguration in 28nm fpgas july 2010 altera corporation 4. Reconfigurable computing is a computer architecture combining some of the flexibility of software with the high performance of hardware by processing with very flexible high speed computing fabrics like fieldprogrammable gate arrays fpgas.
Increasing design functionality with partial and dynamic. The first contribution is an increment description language that allows software. A reconfiguration process may be applied for rearranging the elements of various parts of the system, such as applications, platforms, system architectures. Dynamic reconfiguration of security policies in wireless. On the modeling of dynamic reconfiguration of embedded.
The dynamic reconfiguration of software architectures has to be supported in order to enable their architectural. Apr 12, 2019 dynamic architectures exhibit a property called dynamic reconfiguration, i. For this reason, the dynamic reconfiguration of software architectures is a challenge that must be dealt with to enable the creation and destruction of component instances and their links at runtime. Dynamic software architectures represent one encouraging approach to mitigating these difficulties.
Softwaredefined wireless architectures and testbeds. Frederico alvaresd, herve marchand, gwenael delaval and eric rutten logiconumerical control for software components reconfiguration. Special issue on software engineering for trustworthy cyber. Dynamic reconfiguration of component based software. Dynamic reconfiguration of visuomotorrelated functional.
Composability provides a way to pick compute, memory and storage from a pool, use for a short period and return when finished. With the dynamic reconfiguration framework, individual service can be added, removed, and replaced at runtime without interruption of the system operations. To do so, we investigated fcd mediating a key executing. A software system, during its lifetime, may require several updates, improvements, or new features. The dynamic reconfiguration policy is governed by the c2 policies that may be obtained through the realtime cois at runtime based on the. Highspeed dynamic partial reconfiguration for field programmable gate arrays john hoffman follow this and additional works at. In this paper we propose a uml based approach for describing and checking dynamic software architectures. The ones marked may be different from the article in the profile. Our work defines a design approach to build reconfigurable software architectures, a key issue in the development of selfmanaged software architectures. The configuration information is either generated by the device itself or by an external source. Reconfiguration is achieved during execution of the firmware.
In fact, the uml profile enables us to model dynamic software architectures by three aspects. These pages attempt to organize and coalesce the ongoing work in the field of dynamic software architectures. This cited by count includes citations to the following articles in scholar. The principal difference when compared to using ordinary microprocessors is the ability to make substantial changes to the. In the quartus ii software, identify each of the reconfigurable design blocks as a design partition. Dynamic reconfiguration of software architectures 16 is a term that is used to refer, generally, to those changes. However, the principles governing interareal functional connectivity dynamics fcd remain elusive. Version consistent dynamic reconfiguration of component. The software defined radio sdr has opened the doors for levels of radio reconfiguration not possible through the use of more traditional radio design approaches. Dynamic and coordinated software reconfiguration in. They define a reconfiguration pattern to be a set of recurring. Serviceoriented architecture for command and control.
Dynamic reconfiguration of component based software systems d. For this reason, the dynamic reconfiguration of software architectures is a challenge that must be dealt with to enable the creation and destruction of component instances and their links at. An architectural approach to ensure globally consistent. Dynamic, adaptive and reconfigurable systems overview and. To evaluate our approach we illustrate customisation and dynamic reconfiguration of the gridkit sensor middleware in a floodmonitoring scenario. Dynamic reconfiguration of component based software systems. Framework for dynamic architecture reconfiguration of cloud. An essential role in ensuring and assuring cps trustworthiness is played by their control software. Enables a user to write software programs for an embedded processor that modifies the circuit structure and functionality during the circuits operation. Dynamic reconfiguration of software defined radios using. This volume complements the already published volumes 1 and 2 of the wiley series in software radio.
Mascolo dipartimento di scienze dell lnformazione liniversitk di bologna mura anteo zamboni 7, i40127 bologna, italy phone. In this emerging research work we address the problem of. In this paper, we propose a selfprotection solution for wsns based on the use of dspls. The dynamic reconfiguration of software architectures has to be supported in. Dynamic reconfiguration of software defined radios using standard architectures. An aspectoriented approach for supporting autonomic. Several works have been using architectural specification as the basis for dynamic reconfiguration. Fahmy, university of warwick, united kingdom dynamic and partial reconfiguration are key differentiating capabilities of field programmable gate arrays fpgas. Therefore, additional experimental work using realworld sdnbased wireless testbeds, together with proper performance evaluation of key reconfiguration aspects, is necessary, in order. Versionconsistent dynamic reconfiguration of componentbased distributed. An initial assessment through simulation shows the bene ts of the proposed approach with respect to timeliness and low degree of disruption. Componentbased approaches generalize basic objectoriented implementations by allowing large collections of objects to be grouped together and externalized.
Serviceoriented architecture for command and control systems with dynamic reconfiguration raymond a. Here, we tested the hypothesis that human executive functions arise from the dynamic interplay of multiple networks. Keywords dysam, dynamic software architecture dsa, operational semantics, k framework. On the interplay of aspects and dynamic reconfiguration in a. The increasing demands for computing performance have been a reality regardless of the requirements for smaller and more energy efficient devices. Dynamic reconfiguration dr enables resources to be added or removed while the operating system os is running. Often architectural change means a change in configuration that provides the same or similar functionality, such as in the case of a faulttolerant system. Runtime variability is a key technique for the success of dynamic software product lines dspls, as certain application demand reconfiguration of system features and execution plans at runtime. In this context, this paper proposes a model driven approach to support the composition and dynamic reconfiguration of networked embedded service oriented applications. Runtime reconfiguration is supported both at the adl level and at the runtime level, and both programmed reconfiguration and adhoc reconfiguration are supported. Therefore, the structure of these systems is dynamic. The book discusses the requirements for reconfigurability and then introduces network architectures and functions for reconfigurable terminals. Pdf handling the dynamic reconfiguration of software.
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