研究成果

區塊鏈軟體工程

區塊鏈與物聯網整合的軟體架構樣式

摘要

We can perceive the advent of smart living spaces attributed to the fast emerging of IoT (Internet of Things) technologies. By combining with the blockchain technology, many innovative business models can be brought into reality. This research aims to report our recent progress in investigating the architectural issues for realizing blockchain-driven IoT services. In particular, we present and discuss four typical architectural styles for such services. A preliminary evaluation against different styles is also provided to compare the given styles.

相關著作

  1. Chun-Feng Liao, Sheng-Wen Bao, Ching-Ju Cheng, and Kung Chen, “On Design Issues and Architectural Styles for Blockchain-driven IoT Services, ” in Proc. IEEE International Conference on Consumer Electronics – Taiwan (ICCE-TW), Taipei, Taiwan, 2017.

基於行為驅動開發製程的區塊鏈智能合約整合測試服務平台

摘要

近年來區塊鏈技術受到相當重視,相關應用也開始大量被開發。智能合約是運行於區塊鏈上,用於執行業務、交易的重要元件。如何驗證智能合約正確與完整反映繁瑣的業務規則,是區塊鏈應用程式開發的重要軟工議題。然而,目前尚欠缺系統化整合驗證與測試機制來確保所開發智慧合約的正確性。針對此一挑戰,本研究提出一個支援BDD風格的Solidity智能合約語言的自動整合測試平台,此平台主要提供並解決目前開發與測試智能合約的橫切面考量,並以紅利點數交換為案例,結合上述平台,開發應用情境所需智能合約,就所開發系統進行可用性檢驗,能有效降低智能合約開發測試複雜度與負擔,提升合約品質。

相關著作

  1. Chun-Feng Liao, Ching-Ju Cheng, Kung Chen, Chen-Ho Lai, Tien Chiu, and Chi Wu-Lee, “Toward a Service Platform for Developing Smart Contracts on Blockchain in BDD and TDD styles,” in Proc. 10th IEEE International Conference on Service-Oriented Computing & Applications (IEEE SOCA), 2017.
  2. 廖峻鋒, 鄭敬儒, 陳恭, 賴晨禾, 邱天, ”基於行為驅動開發製程的區塊鏈智能合約整合測試服務平台,” 台灣軟體工程研討會 (TCSE), 台中, 台灣, 2017. (Nominated Best Paper Award)

虛實互動展演軟體工程

A Functional Reactive DSL Service Facility for Mixed-Reality Interactive Performance Art

摘要

dips.jpg Mixed-reality digital interactive performance is a new style of performance art that facilitates impromptu interactions among dancers and virtual characters in real time. However, such performance is difficult to conduct as the performance designer has to deal with the asynchronous events and temporal requirements of interactions among performers, virtual characters, and music, which are tedious and error-prone. This research presents the design and implementation of a domain-specific language called DIPS (Digital Interactive Performance Sketch) that aims to help directors of such performance test their ideas quickly. On the surface, DIPS provides the common domain abstractions and their associated operations for performance with simple rule syntax that simplifies the task of designers to a large degree. Behind the scenes, DIPS is realized through a combination of a number of established language embedding techniques on the Scala language and some middle-level facility based on the Scala Akka library. To evaluate DIPS, we have implemented a language workbench and an execution engine together with an application called the Future Circus. The preliminary evaluation results are encouraging and demonstrate the feasibility and effectiveness of DIPS.

相關著作

  1. Chun-Feng Liao, Zack Grannan, Ming-Chuan Lin, Kung Chen, Ru-Yi Lin, and Yi-Kai Hsiao, “A Functional Reactive DSL Service Facility for Mixed-Reality Interactive Performance Art,” in Proc. 9th IEEE International Conference on Service-Oriented Computing & Applications (IEEE SOCA 2016), 2016.

WISE: a Wearable Platform for Performer-guided Mixed-reality Interactive Performance Art

摘要

Mixed-reality performer-guided performance is a new style of performance art that facilitates impromptu interactions among dancers and virtual characters in realtime using wearable technologies. We present the design of a full-stack wearable integration platform, called WISE (Wearable Item Service runtimE), that supports such performance art behind the scene. WISE deals core issues such as connectivity, manageability, context-awareness, and simplicity of the performance art. The experiment results show that the platform is stable and is able to drive the performance smoothly. We also demonstrate the feasibility of WISE platform by conducting a live interactive public performance called Future Circus supported by the proposed platform.

相關著作

  1. Ya-Lun Tao, Chun-Feng Liao, Hsuan Huang, Ya-Wen Su, Yo-Ja Lin, Pin-Hsin Chen, Tzu-Chieh Tsai, “Step In and Out of the Dreams: Toward an Immersive and Interactive Virtual Experience of Dreams, ” in Adjunct Proc. International Symposium on Wearable Computers (ISWC), Design Exhibition track, Heidelberg, Germany, 2016.
  2. Chun-Feng Liao, Wei-Chen Lu, Yi-Kai Hsiao, Wei-Chen Chang, Kung Chen and Zack Grannan, “WISE: a Wearable Platform for Performer-guided Mixed-reality Interactive Performance Art, ” in Proc. International Conference on Platform Technology and Service (PlatCon'16), 2016. (Best Paper Award)
  3. Hsin Huang, Hsin-Chien Huang, Chun-Feng Liao, Ying-Chun Li, Tzu-Chieh Tsai, Li-jia Teng, and Shih Wei Wang, “Future Circus: A Performer-Guided Mixed-reality Performance Art, ” in International Symposium on Wearable Computers (ISWC), Design Exhibition track, Osaka, Japan, 2015.

智慧家庭服務管理

ROSA:智慧家庭中資源導向隨插即用服務管理協定的設計與實現

摘要

近年來,智慧生活空間技術日益受到重視,在智慧家庭環境中,需要服務管理機制來處理各式軟硬體設備的偵測、發現、資料傳送及組合等問題,藉此來提供符合使用者的服務並提高智慧家庭品質。其中,UPnP是一種相當普及的服務管理機制。然而,UPnP並非完全按照HTTP協定進行設計,使得UPnP較難被理解,且其採用的服務呼叫協定SOAP不但較為複雜且效能不佳。鑒於上述缺點,在本研究提出以REST架構風格來改良UPnP,並藉由UPnP的操作模式來設計協定,在本研究中將這協定命名為ROSA。ROSA特色有兩點,第一是使用標準操作方法HTTP,提供統一介面來降低開發門檻。第二是以REST軟體風格來取代SOAP,藉此改善UPnP效能,並利用REST的特色降低伺服器負載。本研究透過上述特色來改良UPnP,並提供兩個實驗來比對改良前與改良後的差異,藉此來顯示改良的成果。

相關著作

  1. Chun-Feng Liao and Peng-Yu Chen, “ROSA: Resource-Oriented Service Management Schemes for Web of Things in a Smart Home,” in Sensors, Vol.17, Issue.10, 2159, MDPI AG, 2017. [doi:10.3390/s17102159], (SCIE, EI, Impact Factor: 2.677, JCR Journal Ranking,Instruments and Instrumentation: 10/58, Q1).
  2. 陳鵬宇, 廖峻鋒, “智慧家庭中資源導向隨插即用服務管理協定的設計與實現, ” 2014 台灣軟體工程研討會 (TCSE), 南投, 台灣, 2014.

基於CoAP且適用於受限環境的智慧家庭服務發現架構

摘要

智慧家庭應用在現今生活當中,越來越受到各家廠商的青睞,因此其設備與設備之間,相互通訊以及相互應用的效能也越來越重要;傳統服務發現協定往往未考量在智慧家庭中,資源較受限的設備,因此許多服務發現協定對於受限設備並不合適。基於上述原因,本研究以CoAP與MQTT兩大物聯網通訊協定為基礎,設計一套具備Web of Things概念,且適用於受限設備的輕量級資源導向智慧家庭服務架構;其中,本論文將會以CoAP為基礎實作架構底層的服務發現協定:CROSA,再以MQTT延伸作為架構中應用層的傳輸方法,以達到既符合受限設備使用環境要求,更確保在套用在智慧家庭中應用時,能有更直觀且靈活的佈局方法。

相關著作

  1. 胥沛恩, 廖峻鋒, 林明言,”基於CoAP且適用於受限環境的智慧家庭服務發現架構, ” 2016 台灣軟體工程研討會 (TCSE), 基隆, 台灣, 2016.
  2. Wen-Ting Cheah and Chun-Feng Liao, “On Findability Issues of Constrained Web of Things in a Smart Home Environment,” in Proc. International Conference on Platform Technology and Service (PlatCon'17), Busan, Koera, 2017.

智慧家庭中UPnP語意匹配服務管理機制

摘要

智慧生活空間技術近年來受到許多研究人員的重視,這種空間需透過服務管理機制處理各式設備、軟體與裝置的偵測、發現、資料傳送及組合等問題,以達成最佳服務品質。UPnP 是一種不依賴特定平台、 穩定且相當普及的服務管理機制,然而其服務匹配機制太過原始,只支援服務描述的逐字比對,導致應用程式經常找不到服務或服務品質不穩定。在這個計畫中,我們嘗試將語意網技術融入UPnP 的服務管理機制,提出一個具語意匹配能力的UPnP 服務管理模型。期望可在極少額外效能負擔下,進行具備語意匹配能力的服務管理,並可與傳統UPnP 各式裝置相容共存並混合使用。

相關著作

  1. 陳奕明, 黃依凡, 江易倫, 廖峻鋒, “具備高相容性的UPnP語意匹配服務管理機制, ” 2014 台灣網際網路研討會 (TANET), 高雄, 台灣, 2014.
  2. 蔡明倫, 陳翌豪, 古健樺, 陳鵬宇, 廖峻鋒, “具語意匹配能力的UPnP 服務管理模型, ” 2013 台灣軟體工程研討會論文集 (TCSE), 高雄, 台灣, 2013.

智慧生活空間中場域導向服務管理機制之建構與應用

摘要

近年來,隨著資通訊科技的快速發展,各式嵌入式計算與感測裝置微型化,促成普及計算(Pervasive Computing)願景得以實現,亦即將具備計算能力的裝置嵌入至各式日常生活的物品、傢俱與家電中,形成智慧生活空間(Smart Environments)。然而,目前大部份智慧生活空間系統仍以「系統即服務(the system is the application)」的方式進行研發,研究人員必須建構從基礎設施一直到最高層服務應用的所有細節;而較少在middleware 層級針對服務管理層面進行嚴謹、深入且有系統之研討,造成許多單獨開發的技術、成果或應用服務無法順利整合並落實至日常生活中。此外,智慧生活空間與一般系統最大的差別即為「場域(Ambient)」概念,也就是一個具有計算能力且有界限(Bounded)的場所(Place)。Ambient 具有複雜、相互包含且形成類似階層的結構,人位於每個Ambient 時,偏好及使用設備皆有所不同,未考慮Ambient 關係的服務模型,在組合跨Ambient 的服務時,通常無法達成最好的效果。我們針對此一智慧生活空間中最顯著的核心性質,也就是Ambient 概念,對服務管理的影響,並同時從實務及理論層面著眼,提出一個新的Ambient-Oriented 情境感知普及服務管理機制,並進行理論與實驗驗證,最後投射並實現於UPnP (Universal Plug and Play)智慧家庭網路之中,以驗證其可行性。

相關著作

  1. Chun-Feng Liao, “A Formal Model for Robust Spatial-Aware Service Management in IoT-enriched Smart Home, ” in Proc. International Conference on Platform Technology and Service (PlatCon'17), Busan, Koera, 2017.

Human-Centric Context Aware Pervasive Service Composition

摘要

rw-1.jpg In a pervasive system, the criteria for selecting and ranking services are usually specified by users, which tend to be vague and subjective. Moreover, the deployment of pervasive services here is usually not as well-planned as that in traditional enterprise environments. Hence, the criteria can be contradictory and the activated services can interfere with one another.

In this research, we address these issues by first defining the Preference Expression Language (PEL) that is capable of specifying both enumerative/numeric as well as mandatory/negotiable user preferences. Second, a set of unification rules for conflictive preferences is presented. Third, the degree of interference is modeled and estimated by using fuzzy reasoning approaches. By incorporating the above-mentioned mechanisms, we propose a preference aware service composition framework that can avoid service interferences autonomously.

相關著作

  1. Chun-Feng Liao, Hsueh-Hung Cheng and Li-Chen Fu, ”Unifiable Preference Expressions for Pervasive Service Composition,” in Proceedings of 2011 IEEE Asia-Pacific Services Computing Conference (IEEE APSCC 2011), 2011. (Best Paper Award)
  2. Hsin-Chih Chang, Chun-Feng Liao, and Li-Chen Fu, ”Unification of Multiple Preferences and Avoidance of Service Interference for Service Composition in Context-Aware Pervasive Systems,” in Proceedings. of 7th ACM International Conference on Pervasive Services (ACM SIGAPP ICPS’10), Berlin, Germany, 2010.
  3. Hsin-Chih Chang, Chun-Feng Liao, Yong-Cheng Liu, and Li-Chen Fu, ”A Spontaneous Preference Aware Service Composition Framework for Message-Oriented Pervasive Systems,” in Proceedings of the 4th International Conference on Pervasive Computing and Applications (ICPCA’09), Taipei, Taiwan, 2009.

Robust Service Management in Message-Oriented Pervasive Systems

摘要

rw-4.jpg Reliability is one of the key challenges of Pervasive systems. Numerous Message-Oriented architectures and service discovery protocols have been proposed to support service management in Pervasive systems. Nevertheless, few researches have been done to improve the reliability of Pervasive systems. This research attempts to propose a reliable service management framework by formally defining a Message-Oriented service application model and protocols that facilitate autonomous composition, failure detection and recovery of services. Proposed approaches are realized by constructing a developer’s toolkit that enables rapid-prototyping of services. The recovery rate of systems can be greatly improved by the proposed approach. Furthermore, the services developed by using the proposed approach are capable of integrating heterogeneous software/hardware, and can be deployed in dissimilar sites with little efforts.

相關著作

  1. Chun-Feng Liao, Ya-Wen Jong, Li-Chen Fu, “Toward Reliable Service Management in Message-Oriented Pervasive Systems,” IEEE Transactions on Services Computing, vol. 4, no. 3, pp. 183-195, July-Sept. 2011, doi:10.1109/TSC.2010.59
  2. C.-F. Liao, Y.-W. Jong and L.-C. Fu, “Toward a Message-Oriented Application Model and its Middleware Support in Ubiquitous Environments,” International Journal of Hybrid Information Technology, vol.1, no.3, July 2008.
  3. 陳志明、廖峻鋒、鍾亞文、傅立成、張慶年,”以訊息為導向之數位家庭服務應用技術,” 電信研究雙月刊, 智慧化生活應用技術特輯, vol.39, no. 5, Oct 2009.
  4. C.-F. Liao, Y.-W. Jong, and L.-C. Fu, “PSMP: A Fast Self-Healing and Self-Organizing Pervasive Service Management Protocol for Smart Home Environments,” in Proceedings of 2008 IEEE Asia-Pacific Services Computing Conference (IEEE APSCC 2008), Yilan, Taiwan, 2008.
  5. C.-F. Liao, Y.-W. Jong, and L.-C. Fu, “Community-based Autonomous Service Activation and Failure Recovery in a Message-Oriented Pervasive Middleware,” in Proceedings of 2008 International Workshop on Context-Aware Pervasive Communities: Infrastructures, Services and Applications (CAPC 2008, Held in Conjunction with Pervasive 2008), Sydney, Australia, 2008.
  6. C.-F. Liao, Y.-W. Jong, and L.-C. Fu, “Toward a Message-Oriented Application Model and its Middleware Support in Ubiquitous Environments,” in Proceedings of 2008 International Conference on Multimedia and Ubiquitous Engineering (MUE 2008), Busan, Korea, 2008.

智慧家庭通訊協定

資源導向CWMP的設計與實現

摘要

解決智慧家庭系統的維運議題,是智慧家庭技術普及化,進而形成產業的重要前提。Broadband Forum提出的CWMP是目前較普及與成熟的維運技術,但CWMP仍具有改善空間,包含效能與擴充性不佳、領域模型設計不良,及Web回呼機制未臻完善。本研究提出以資源導向架構風格改良CWMP,針對現行各種Web回呼機制做分析,並設計一個資源導向智慧家庭服務維運平台,透過實驗與實作應用情境,驗證其功能完備性、效能及實務上之可行性。

相關著作

  1. 陳映如, 廖峻鋒, ”資源導向智慧家庭服務維運機制的設計與實現,” 台灣軟體工程研討會 (TCSE), 台中, 台灣, 2017.

基於CWMP的智慧家庭服務營運管理架構

摘要

Despite the well-development of smart living space research field, Smart Home is still more like a luxury product than a daily necessity for most families. Operations management issues are essential for a new technology to be accepted by the mass consumer market. However, only few attempts have been made toward this direction. This research presents the design and implementation of a CWMP-based platform that supports autonomic operations management. The experiment results show that the the proposed approach is stable and is able to drive the operations tasks smoothly. We also demonstrate the feasibility of the platform by realizing two application scenarios supported by the prototype of the proposed approach.

相關著作

  1. Chun-Feng Liao, Shih-Ting Huang, Yi-Ching Wang, “Autonomic Smart Home Operations Management using CWMP: A Task-centric View,” in Proc. 29th International Conference on Industrial, Engineering & Other Applications of Applied Intelligent Systems (IEA/AIE'16), LNCS 9799, Morioka, Japan, 2016.
  2. 黃詩庭, 王依晴, 廖峻鋒, “基於TR-069的智慧家庭服務營運管理架構,” 2015民生電子研討會 (WCE 2015), 彰化, 台灣, 2015.

聚合式BLE-MQTT閘道設計

摘要

就技術角度來看,數位互動藝術展演是典型物聯網環境,舞台和表演者身上佈署許多微小感測裝置,大多透過低功率網路(BLE)做為通訊媒介。隨著表演使用裝置數量增加,裝置間溝通變得更為複雜且難以管理,尤其當訊息在傳送過程中遺失或裝置失效時,開發人員須花費極大心力尋找錯誤。物聯網應用開發經常使用MQTT(Message Queuing Telemetry Transport)進行訊息傳遞與整合,透過發佈與訂閱架構降低訊息傳遞複雜度,並提供服務品質與遺囑的保障機制。然而MQTT無法直接與BLE裝置整合。本研究提出聚合式BLE-MQTT閘道設計,讓BLE裝置能夠與MQTT進行溝通,且擁有MQTT發佈與訂閱功能並得到服務品質與遺囑保障機制,藉以降低開發人員管理負擔。

相關著作

  1. 盧威辰, 廖峻鋒, ”適用於數位互動藝術的聚合式BLE-MQTT 閘道設計,” 台灣軟體工程研討會 (TCSE), 台中, 台灣, 2017.

智慧家庭中MQTT 透通式傳輸層轉接架構的設計與實作

摘要

在物聯網環境下,所有物品透過互聯網連結,每個物 體都能被定址且相互通訊。MQTT(Message Queuing Telemetry Transport) 是一個近年來十分受重視的物 聯網應用層協定,主要基於TCP 運作。然而,在智 慧家庭中,家電或感測器等精簡型裝置通常只能在 具備有限的計算資源與網路頻寬,因此本研究主要 目的在於嘗試結合Reliable UDP 與TCP,實現以 MQTT 技術為基礎的智慧家庭聯網服務管理機制,使 得MQTT 亦可以透通地與耗頻寬較少的UDP 網路 互通,並加上Reliable 機制來對應封包漏失問題。我 們設計了稱為MUG(MQTT-UDP Gateway) 的Proxy 機制,介接到以TCP 為傳輸層的MQTT 骨幹,透過 我們所設計的,智慧家庭應用服務管理邏輯可以在沒 有額外設定與程式修改的情況下,基於不同的傳輸層 透通地運作。

相關著作

  1. 胥沛恩, 廖峻鋒, “智慧家庭中MQTT 透通式傳輸層轉接架構的設計與實作,” 第20屆行動計算研討會 (MC 2015), 南投, 台灣, 2015.

Traffic Reduction Schemes for UPnP-based Home Networks

摘要

rw-2.jpg The use of message-oriented architectures in pervasive systems has increased noticeably because of their failure tolerant and loosely-coupled natures. Meanwhile, decentralized service management protocols such as UPnP are believed to be more suitable for small scale pervasive environments such as smart homes. These protocols are usually realized by using IP multicast, which, if not carefully designed, often suffer from network flooding problems due to the replications of too many unnecessary messages.

In this research work, we designed and analyzed of efficiency boosting techniques that reduce the replications of unnecessary messages when decentralized service management protocols are used to manage message-oriented pervasive systems. The analytical predictions agree well with the simulated results, which show that the message counts of SSDPbased presence and leave announcements, node discovery, and heartbeat can be greatly reduced.

相關著作

  1. Chun-Feng Liao, Hsin-Chih Chang, and Li-Chen Fu, “Message-Efficient Service Management Schemes for MOM-based UPnP Networks,” in IEEE Transactions on Service Computing, 2011. (to appear)
  2. Chun-Feng Liao, Hsin-Chih Chang, and Li-Chen Fu, ”Boosting the Efficiency of the Reliable Service Management Protocol for Message-Oriented Pervasive Systems,” in Proceedings of the IEEE International Conference on Service-Oriented Computing and Applications (IEEE SOCA’09), Taipei, Taiwan, 2009.

智慧家庭中介軟體

A Platform for Detecting High-Level Contexts from Complex Event Streams in Pervasive Environment

摘要

A Pervasive-computing-enriched smart environment, which contains hundreds of embedded devices coordinated by service management mechanisms, is capable of anticipating intensions of occupants and providing appropriate services accordingly. To acquire high-level contexts, such as human activities, usually involves analyzing and identifying causality and temporal ordering relationships among a bulk stream of sensor readings. However, there are relatively few works investigating this issue. We notice that Complex Event Processing (CEP) is useful for dealing with the issue mentioned above. In this work, we propose a platform for integrating CEP concepts with PerSAM, a service application model for pervasive environments. Applications and experiments are performed to verify the effectiveness of the proposed platform.

相關著作

  1. Chun-Feng Liao, Chao-Ting Cheng, Tzu-Yuan Weng, Wei-Chen Lu, and Kung Chen “A Platform for Detecting High-Level Contexts from Complex Event Streams in Pervasive Environment,” in Proc. International Conference on Platform Technology and Service, 2015.

A Guideline-Driven Platform for Healthcare Services in Smart Home Environments

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摘要

The guidelines are usually established by medical ex-perts, according to the symptom of disease. Based on the biological information, habits, and the surrounding environment information form sensors, the guideline engine makes the appropriate care decisions and then alerts after the information is observed. Further-more, the proposed platform can gather feedback information about the reaction follow-ing collecting the implementation of the guidelines by monitoring system. In case of emergency, the platform uses the short message system to inform the relevant units im-mediately. The smart home integration platform can therefore reduce the burdens of care and unexpected events with effectiveness; therefore it enhances the quality of family care.

相關著作

  1. 廖峻鋒、張馨之、傅立成,”以醫療照護指引技術為基礎的智慧型居家健康照護平台,” 電信研究雙月刊, 智慧化生活應用技術特輯, vol.39, no. 5, Oct 2009.
  2. C.-F. Liao, S.-C. Chang, and L.-C. Fu, “A Guideline-Driven Platform for Healthcare Services in Smart Home Environments,” in Proceedings of 8th International Conference on Smart Homes and Health Telematics (ICOST 2010), Seoul, Korea, 2010.

Service-Oriented Smart Home Architecture based on OSGi and Mobile Agent Technology

摘要

rw-5.jpg The architecture of a conventional smart home is usually server-centric and thus causes many problems. Mobile devices and dynamic services cause the dynamically changing environment, which can result in very difficult interaction. In addition, how to provide services efficiently and appropriately is always an important issue for a smart home. To solve the problems caused by traditional architectures, to deal with the dynamic environment, and to provide appropriate service, we propose a service-oriented architecture for smart home environments, based on OSGi and mobile agent technology. This architecture is a Peer-to-Peer model based on multiple OSGi platforms, in which service-oriented mechanisms are used for system components to interact with one another, and mobile agent technology is applied to augment the interaction mechanisms.

相關著作

  1. C.-L. Wu, C.-F. Liao and L.-C. Fu, “Service-Oriented Smart Home Architecture based on OSGi and Mobile Agent Technology,” IEEE Transactions on Systems, Man and Cybernetics - Part C, Special Issue on Networking, Sensing, and Control, vol.37, no.2 , 2007.
  2. W.-R. Jih, J. Y.-J Hsu, C.-L. Wu, C.-F. Liao, and S.-Y. Cheng, “A Multi-Agent Service Framework for Context-Aware Elder Care,” Proceedings of Workshop of Service-Oriented Computing and Agent-Based Engineering (SOCABE'2006), Hakodate, JAPAN, 2006.

A Rapid-Prototyping Platform for PDR-based Indoor Positioning System on Smart Phones

摘要

architecture.jpg

Pedestrian Dead Reckoning (PDR) is a popular indoor positioning mechanism that requires minimal infrastructure. Meanwhile, smart phone is becoming popular in recent years, making it an ideal sensor platform for indoor positioning. Nevertheless, realizing PDR on a smart phone is still challenging as the developer has to go through several construct/evaluate cycles before finding appropriate algorithms and parameters. In this research, we propose a flexible platform for rapid-prototyping PDR indoor positioning engine on smart phones. Based on the platform, the developer is able to tailor the engine by the composition of components so that the construct/evaluate cycle time can be greatly reduced.

相關著作

  1. Chun-Feng Liao and Kung-Huan Lin, “A Rapid-Prototyping Platform for PDR-based Indoor Positioning System on Smart Phones,” in Proc. 2014 International Conference on Information Science, Electronics and Electrical Engineering, Sapporo City, Hokkaido, Japan, April, 2014.
  2. 林恭煥, 石佳雯, 許雅婷, 簡嘉瑩, 廖峻鋒, “基於智慧手機的室內PDR定位系統模組化快速開發平台, ” 2013 台灣網際網路研討會 (TANET), 台中, 台灣, 2013.

雲端多租資料管理

Tenant-aware Query Rewriting Engine for Universal Table Schema-Mapping

與政治大學資訊科學系陳恭教授團隊之共同研究成果

摘要

rewriting.jpg In software as a service (SaaS) environments, designing a multi-tenant data architecture that supports shared database with custom extension is a non-trivial task. A general approach to support such an architecture is a middlewarelevel facility that supports the mapping of multiple single-tenant logical schemas in the application to one multi-tenant physical schema in the database.
We follow this approach and report our preliminary results on the design and analysis of a query rewriting engine that can transparently transform tenantspecific logical queries into corresponding physical queries for Universal Table, a widely adopted and industry verified schemamapping technique. A prototype and a sample SaaS application are implemented to verify the feasibility of the design of the query rewriting engine. Besides, performance analysis results that can be used to predict the overhead of schema-mapping in the engine are also reported.

相關著作

  1. Chun-Feng Liao, Kung Chen, and Jiu-Jye Chen, Toward a Tenant-aware Query Rewriting Engine for Universal Table Schema-Mapping,” in Proc. of the IEEE International Conference on Cloud Computing Technology and Science (IEEE CloudCom 2012), presented in 2012 International Workshop on SaaS (Software-as-a-Service) Architecture and Engineering, Taipei, Taiwan, 2012.
  2. Chun-Feng Liao, Kung Chen, and Jiu-Jye Chen, “Modularizing Tenant-Specific Schema Customization in SaaS Applications,” in Proc. ACM International Conference on Aspect-Oriented Software Development (AOSD'13), presented at 8th International Workshop on Advanced Modularization Techniques, Fukuika, Japan, March, 2013.
  3. Chun-Feng Liao, Kung Chen, and Jiu-Jye Chen, “A Service Framework for Multi-Tenant Enterprise Application in SaaS Environments,” in Proc. 9th International Conference on Software Engineering and Applications, Vienna, Austria, 2014. (ICSOFT 2014, acceptance rate: 14%)
  4. Chun-Feng Liao, Kung Chen, and Jiu-Jye Chen, “Context and Data Management for Multitenant Enterprise Applications in SaaS Environments: A Middleware Approach,” in Software Technologies, Communications in Computer and Information Science, Springer, 2014. (EI, an extended version of the ICSOFT 2014 paper)
  5. Chun-Feng Liao, Kung Chen, Deik Hoong Tan, and Jiu-Jye Chen, “Automatic Query Rewriting Schemes for Multi-Tenant SaaS Applications, ” in Automated Software Engineering, (SCI, EI), 2015. (DOI) 10.1007/s10515-015-0178-2
 
researchworks.txt · 上一次變更: 2017/09/22 01:56 來自 try
 
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