big data and iot

Big Data Mining and Internet of Things

Presented By-

Shubham Singh(40004796)

Shubhangi Sheel(40004793)

ProblemsPaper 1: Data Mining with Big Data

Modeling big data characteristics (HACE Theorem)

Identify key challenges for big data mining

Paper 2: IOT-StatisticDB: A General Statistical Database Cluster Mechanism for Big Data Analysis in the Internet of Things

Sensor sampling data is huge, heterogeneous and have totally different formats and semantics

No statistical in database kernel analysis techniques available for IoT data

Most of the existing statistical analysis methods are centralized solutions, unsuited forIoT

Kind of data we are talking about?

Searching on Google with “Yan Mo Nobel Prize,” resulted in 1,050,000 web pointers

News media

Comments on social network

Cross-referenced discussions by critics

Square Kilometer Array (SKA) in radio astronomy consists of 1,000 to 1,500 dishes (15-meter) in a central 5-km area in South Africa and Australia

It provides 100 times more sensitive vision than any existing radio telescopes

It generates 40 gigabytes (GB)/second data volume

Existing methods can only work in an offline fashion and

are incapable of handling this Big Data scenario in real time

BIG DATA CHARACTERISTICS: HACE THEOREM

H: Heterogeneous

A: Autonomous Sources

C: Complex Data

E: Evolving Relationships

‘H’ for Heterogeneity

Heterogeneous and diverse dimensionalities

Different schemata and protocols

Example: An individual is represented by

Demographic Information: Text (gender, age , family disease history etc.)

X-ray Examination: Image

CT Scan: Image/ video

DNA or genomic related test: Image (microarray expression images and sequences)

‘A’ for Autonomous sources with distributed and decentralized Control

Autonomous data sources with distributed and decentralized controls

Example: World Wide Web (WWW): Each web server provides a certain information and is able to fully function independently

Google, Flicker, Facebook, Walmart: Have large number of server farms deployed all over the world

Local legislations are different

Seasonal promotions

Top selling items

Customer behavior

‘C’ for Complex Data and ‘E’ for Evolving Relationships

In centralized information systems, the focus is on finding best feature values to represent each observation

Example: Facebook or Twitter

An individual is represented by features but the social connections which is the most important factor of human society is not taken into account

In a dynamic world, the features evolve with respect to temporal, spatial, and other factors.

Clustered data

Linear regression

Central core with 3 flaresLoopy behavior

Clustered data

DATA MINING CHALLENGES WITH BIG DATA

DATA MINING CHALLENGES WITH BIG DATA

Tier III: Big Data Mining Algorithms

Tier II: Big Data Semantics and Application Knowledge

Tier I: Big Data Mining Platform

Tier I: Big Data Mining Platform

A computing platform requires two resources: Hard disks and Processors

Big data is distributed, so parallel computing and collective mining is used

Frameworks rely on cluster computers with a high performance computing platforms such as MapReduce or Enterprise Control Language

Example: Super computer Titan, deployed at Oak Ridge National Laboratory in Tennessee,

contains 18,688 nodes each with a 16-core CPU.

Elephant in the room

Data Privacy


Information Sharing and Data Privacy

Restrict access to the data

Anonymize data fields

Domain and Application knowledge

Identify right features for modeling the underlying data

Example: Blood glucose level is clearly a better feature than body mass in diagnosing Type II diabetes


Tier III: Big Data Mining Algorithms

Local Learning and Model Fusion for Multiple Information Sources

Mining distributed data often leads to biased view of the data resulting in biased decisions or models

To overcome this, we need to enable information exchange and fusion mechanisms to ensure global optimization goal i.e. local mining and global correlations

Mining from Sparse, Uncertain, and Incomplete Data

Sparse, uncertain, and incomplete data are defining features for Big Data applications.

Sparse data

number of data points are too few for drawing reliable conclusions

Uncertain data

Data field is no longer deterministic but is subject to some random/error distributions

Data item is represented as sample distributions but notas a single value, so most existing data mining algorithmscannot be directly applied

Incomplete data

Incomplete data refers to the missing of data field values forsome samples

Data imputation is an established research field that seeksto impute missing values to produce improved models

Conclusion

HACE theorem suggests that the key characteristics of the Big Data are

Huge with heterogeneous and diverse data sources,

Autonomous with distributed and decentralized control,

Complex and Evolving in data and knowledge

Analyzed several challenges at the data, model and system levels

Analyzed challenges in Data mining:

Information Sharing and Data Privacy

Domain and Application knowledge

Data Mining Algorithms

Paper 2: IOT-StatisticDB: A General Statistical Database Cluster Mechanism for Big Data Analysis in the Internet of Things

This paper discusses :

A generalized schemata to store different sensor data

Distributed architecture for parallel computing for IoT

Statistical analysis techniques and relevant operators

Architecture of IOT-StatisticDB

IoT Generalized Schema

SensorID(String)

SensorType(String)

DeployedBy(String)

DepoyedTime(Instant)

Samplings(SamplingSequence)

Samplings

Definitions

1. Traffic Network: Net = (E, N)

I. E is set of e defined as the form e = (eid, geo, len, nids, nide)

II. N is set of n is defined as the form n = (nid, loc,(eid)m i-1 ,mat)

III. Net = (E, N)

Node Region/ Service Area

IOT table and Data Distribution at IoT-Storage and Statistics Layer

2. SamplingValue = (t, loc, npos, schema, value)

* Note: Sampling value can be considered as a data type which defines the type of data from the sensors

3. SamplingComponent = (cSchema, cValue)

e.g. (“speed: real”, 62.5) or (“direction: real”, 22)

4. SamplingSequence = (schema, (ti, loci, nposi, valuei, flagi)ni-1

Types of SensorsTime (t) Location(loc)

Networkposition(npos)

Schema Value

Temperature t1 39.5, 145.2 null “temperature: real” 27.5

GPSt2

39.3, 144.3 e201“speed: real, direction:

real”(62.5, 22)

Windt3

38.2, 142.8 Null“windspeed: real,

winddir: real”(62.5, 22)

Vitalized valuefrom Traffic

Video Camera

t439.7, 142.1 e202

“averageSpeed: real,jam: bool”

(62.5, true)

Query Operators for Data Retrieval and for Statistical Analysis

*Format: FunctionName (Input Parameters) -> Output

Truncation Operators:

1. truncateGeo (SamplingSequence*Region) ->SamplingSequence

2. truncateTime (SamplingSequence*Periods)->SamplingSequence

3. atInstant (SamplingSequence* Instant )-> SamplingValue

Types of SensorsTime (t) Location(loc)

Networkposition(npos)

Schema Value

Temperature t1 39.5, 145.2 null “temperature: real” 27.5

GPSt2

39.3, 144.3 e201“speed: real, direction:

real”(62.5, 22)

Windt3

38.2, 142.8 Null“windspeed: real,

winddir: real”(62.5, 22)

Vitalized valuefrom Traffic

Video Camera

t439.7, 142.1 e202

“averageSpeed: real,jam: bool”

(62.5, true)

Projection Operators:

Component Extraction Operator:

getComponent: SamplingValue*integer -> SamplingComponent

Statistical Analysis Operators

spatialAggrEU: String *String -> Region

spatialAggrNet: String* String-> Lines

parameterAggrEU: String*String-> Real

parameterAggrNet: String *String-> Set(String *String)

Sampling-Sequence-Based Projections Sampling-Value-Based Projections

sProjectLines: SamplingSequence -> Lines //for moving sensorssProjectPoint: SamplingSequence -> Point //for static sensorssProjectNetPos: SamplingSequence->Set(String)sProjectTime: SamplingSequence -> Periods

vProjectPoint: SamplingValue-> PointvProjectNetPos: SamplingValue-> StringvProjectTime: SamplingValue -> Instant

Euclidean-Based Spatial Aggregation

Q1: If the task is to find area in BeijingGeo where the pollution level is above 450 at time t.

Qdata = “SELECT sProjectPoint(Samplings) FROM IoTData

WHERE SensorType = “PollutionSensor”

AND inside(sProjectPoint(Samplings), BeijingGeo)

AND getComponent(atInstant(Samplings, t), 1) > 450”;

Select spatialAggrEU (Qdata, DBScan (distance1, number1))

Algorithm:

INPUT: Qdata: String; // Statistical raw data collection query

cMethodPara: String;

// Clustering method and its parameters;

OUTPUT: R: Region;

1. queryRegion = GetQueryRange(Qdata);

2. Nodes = {node | area(node) queryRegion Ø}

3. FOR node Nodes DO IN PARALLEL

4. StatisticalRawData = Execute(Qdata);

5. R (node) = clusterContour(StatisticalRawData, cMethodPara);

6. SendMaster(R (node));

7. ENDFOR;

8. Results = {R(node) | node Nodes};

9. R = regionMerge(Results);

10. Return (R).

Network-Based Spatial Aggregation

Q2: If task is to find area blocked edge sections with vehicle speed lower than 5 km/h) at time t in the traffic network of Beijing area

Qdata = “SELECT atInstant(Samplings, t) FROM IoTData

WHERE SensorType = “VehicleGPS” AND inside(sProjectPoint (atInstant(Samplings, t)), BeijingGeo)

AND getComponent(atInstant(Samplings, t), 1) < 5”;

Select spatialAggrNet (Qdata, DBScanNet(distance1, number1))

Algorithm:

INPUT: Qdata: String; //Raw data collection querycMethodPara:String; //clustering method& parameters;

TrafficNet: Net; //the traffic network;OUTPUT: R: Lines;1. queryRegion = GetQueryRange(Qdata);2. Nodes = {node | area(node) queryRegion Ø}3. FOR node Nodes DO IN PARALLEL4. StatisticalRawData = Execute(Qdata);5. R (node) = netClusterLines(StatisticalRawData, trafficNet, cMethodPara);6. SendMaster(R(node));7. ENDFOR;8. Results = {R(node) | node Nodes};9. R = linesMerge(Results);10. Return (R).

Euclidean-based Parameter Aggregation

Q3: If task is to find the average pollution level at time t in BeijingGeo.Qdata=“SELECT getComponent(atInstant(Samplings, t), 1)

FROM IoTData

WHERE SensorType = “PollutionSensor”

AND inside(sProjectPoint(Samplings), BeijingGeo)”;

Select parameterAggrEU (Qdata, Average)

Algorithm:

INPUT: Qdata: String; //Raw data collection query

method: String; //aggregation method

OUTPUT: R: Real;





5. R (node) = aggregate(StatisticalRawData, method);

6. N (node) = |StatisticalRawData|;

7. SendMaster(R(node), N(node));

8. ENDFOR;

9. Results = {(R(node), N(node)) | node Nodes};

10. R = valueMerge(Results, method);

11. Return (R).

Network-based Parameter Aggregation

Q4: If task is to find the traffic flow parameters at time t for each edge in BeijingGeo.Qdata= “SELECT sTruncateTime(sTruncateGeo (Samplings, BeijingGeo), [ t - 5*Minute, t ])

FROM IoTDataWHERE SensorType = “VehicleGPS””

Select parameterAggrNet (Qdata, TrajectoryAnalysis);

Algorithm:

INPUT: Qdata:String; //Raw data collection query

method: String; //aggregation method

OUTPUT: R; //of the form Set((edgeID:string, para: string))





5. R (node) = trafficAnalysis(StatisticalRawData, method);

6. SendMaster(R (node));

7. ENDFOR;

8. Results = {R(node) | node Nodes};

9. R = edgeBasedValueMerge(Results);

10. Return (R).

Experimental Studies

The prototype system contained one master server and 2~32 node servers.

The real GPS trajectory data was collected from 20,000 taxi cabs in Beijing and the average GPS sampling frequency was 30 seconds.

The sampling sequence data of 200,000 static sensors was generated through simulation and the average sampling frequency of static sensors was 5 minutes.

Compared with: Centralized Statistical Analysis with Data Source Distributed (CSA-DSD): It stores sensor sampling data in a distributed manner among multiple node servers but has one master server to do all the statistical analysis

We performed above 4 queries on both IoT and CSA-DSD and compare the query time response against numbers of nodes and number of sensors.

Query response time vs. number of nodes

Query response time vs. no. of sensors

Conclusions

A generalized schemata to store different sensor data was proposed

Proposed architecture to store data in distributed manner and parallel computing in real time basis

Statistical analysis operators were defined

Algorithms for statistical analysis of IoT data was proposed.

Experimental results were compared with other similar framework.

big data and iot

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