SeaCloudDM: Massive Heterogeneous Sensor Data Management in the Internet of Things
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1 SeaCloudDM: Massive Heterogeneous Sensor Data Management in the Internet of Things Jiajie Xu Institute of Software, Chinese Academy of Sciences (ISCAS)
2 Outline 1. Challenges in IoT Data Management 2. SeaCloudDM: Architectures and Solutions 3. Conclusion
3 Outline 1. Research Bac 2. SeaCloudDM: Architecture and Solutions 3. Conclusion
4 Background Internet of Things: The Internet of Things (IoT) refers to uniquely identifiable objects (things) and their virtual representations in an Internet-like structure. IoT-CloudDB Query Processing Applications Universal IoT data management platform intelligent Acquire Store Process Use
5 Challenges and Limitations 1 An IoT system may contain various kinds of sensors whose sampling data have heterogeneous data structures (heterogeneity) For instance, traffic sensors: GPS sensors RFID readers video-based traffic-flow analysis sensors, traffic loop sensors road condition sensors...
6 Challenges and Limitations 2 The data to be managed in IoT are massive, dynamic data Multimedia Data from video cameras, telemetric devices, and other similar devices; Moving Objects Databases Sensor data are sampled frequently, resulting in large data size; Sensor data are dynamically change data streams with arriving of new data and deleting of old data.
7 Challenges and Limitations 3 Spatial-temporal attribute is intrinsic for IoT data (Spatial- Temporal Logic) Queries can not be answered through keyword match with SensorID. Instead, through Spatial-Temporal Constrains; Queries can not be answered through keyword match with Time-stamps. Instead, through Spatial-Temporal interpolations.
8 Outline 1. Research Background 2. SeaCloudDM: Architectures and So 3. Conclusion
9 Architecture of Sea-Cloud-based massive heterogeneous sensor Data Management (SeaCloudDM) framework Data Analysis & Application Layer Cloud Data Management Layer Sensor Deployment Layer Sea-Computing Layer OLAP, Statistical Analysis & Data Mining based on Massive Sensor Data Information Retrieval and Intelligent Recommendation IoT Applications (ITS, Smart-Grid, Emergency Management ) RDB-KV Cloud: Relational-DB and Key-Value Combined Cloud Storage RDB-KV DB: Unified DB for Heterogeneous Sensor Data Management Sea-Computing: Sensor Connection & Raw Sampling Data Processing Sea-Cloud-based Cooperative Data Management Mechanism Sea-Computing Node Sea-Computing Node Sea-Computing Node Sea-Computing Node Sea-Computing Node Sea-Computing Node traffic sensors hydrological sensors geological sensors video analysis sensors telemetric analysis sensors moving video analysis sensors
10 1. Sea-Data Processing Mechanism Key samplings (numerical) Heterogeneous input from various kinds of sensors, standardized (uniform) output data to Cloud Data management layer ; SamplingValue = (t, (x, y), npos, schema, value) SamplingSequence=(schema, (t, ((x, y), npos, value, flag))) Derived Numerical Values Multimedia Analysis Extraction of Key Samplings Numerical Samplings RFID Samplings Multimedia data analysis: multimedia data numerical data; Key samplings identification and extraction Multimedia Samplings State-threshold based extraction method.
11 2. Cloud-Data Management Mechanism Relational DataBase and Key-Value store combined (RDB-KV) model Homogeneous database nodes for heterogeneous sensor sampling data (both historical and present); DBMS-kernel based data types, operators and indices for sensor data management, supporting both SQL and keyword search; Sensor Sampling Sequence: for data stream and for spatialtemporal interpolation query processing. RDB-KV Cloud SQL / ST-Logic Keyword Search
12 2. Cloud-Data Management Mechanism (Cont d) RDB-KV Database for Uniformed Storage of Heterogeneous Sensor Data Example: Data Types, Operators for sensor sampling data Operators Data Types Spatial-Temporal Queries Keyword Queries
13 2. Cloud-Data Management Mechanism (Cont d) Sensor-Sampling-Sequence Spatial-Temporal Tree (S4T-Tree) Spatial R-Tree Index static objects Grid-Sketched Spatial-Temporal R-Tree Index moving objects T Grid Cell MBR 1 MBR 2 Sketched Trajectory Original Trajectory Y X Original Trajectory Unit MBR 3 MBR 4 MBR 5 MBR 6 stu 1 stu 3 stu 2 stu 4 stu 8 stu 5 stu 9 stu n Maximum Bounding Rectangle (MBR) Sketched Trajectory Unit (STUs) RDB + KV Database Engine: Keyword-Tuple Reverted-File Index keysearch Operator
14 2. Cloud-Data Management Mechanism (Cont d) RDB-KV Cloud for Management of Massive Sensor Sampling Data Geo-based Data distribution: Sampling sequence truncation; Home (registered) location based distribution (Hilbert Curve Symbolization). Global Indices: Spatial-Temporal, Keyword index master 根 Root 结 点 Node master Keyword Range Partition Table t site 1 site 2 site 3 site 4 叶 Leaf 结 点 Nodes site 1 site 2 site 3 site 4 叶 Leaf 结 点 Node s 的 管 辖 Service 区 域 Area KeywordsiteID Mapping B+ Tree α(site 1 ) α(site 2 ) α(site 4 ) α(site 3 ) IoTData Table FTKB+ - Tree
15 Outline 1. Research Background 2. SeaCloudDM: Architectures and Solutions
16 Conclusion SeaCloudDM framework with a sea-cloud-based cooperative data management mechanism is proposed; Sea (70%~90%) + Cloud (10%~30%) Data Management A RDB-KV database model is proposed, with related data types, operators, and indices defined; manages heterogeneous sensor sampling data in a uniformed manner A RDB-KV cloud data management model is proposed to manage massive sensor sampling data. combines the advantages of both relational databases and key-value stores
17 Thanks!
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