无线传感网络数据融合技术

ADDA
& lossy aggregation
AIDA
Integrated
data-level aggregation feature-level aggregation decision-level aggregation
Data aggregation in network layer
S2
S1 C
Assuming that the hypothetical test allows only affect the final aggregation result of sensor nodes to be communicated by monitoring the communication status of the neighbor nodes, the nodes participating in the communication can be significantly reduced
Query Processing Techniques
01
Centralized and distributed
02 Gather operation
03 Snapshot query
04 Tiny DB
Centralized and distributed
Centralized query
Centralized means that only one piece of data is used throughout the entire system
Part 03
Summary
Summary
Query Processing
The real challenge in query processing is to support multi-query optimization .
Data Aggregation
Data aggregation
Keywords
02
According to the relationship between data aggregation and semantics
Keywords
03
According to the level of data aggregation operation
Keywords
lossless aggregation
DB
AVG
D
Hale Waihona Puke Baidu
AVG
AVG
D
AVG
D
Plan B
Gather operation
1 Centralized and distributed 2 Assembly line 3 Hypothetical test
Centralized and distributed
Assembly line
Hypothetical test
ESPDA not only reduces the traffic between cluster nodes and cluster heads, but also increases the security of wireless sensor networks. Because the pattern encoding is encrypted and compressed, and the size is smaller than the size of the packet.
Tiny DB
Queries in Tiny DB consist of a SELECT - FROM WHERE -GROUPBY clause that supports selection, join, projection, and aggregation of data. The semantics of SELECT, FROM, WHERE, and GROUP BY clauses are ‘ SQL - like ’
Part 02
Data Aggregation
Why data aggregation ?
Save energy
Accurate information
Improve efficiency
Classification
01
According to the information before data aggregation
technology has been widely used in target automatic identification and other fields
Thanks for your listening
Reporter：Richard
June，2017
Distributed is that each client has a copy of the data, other data operations are used to copy
Distributed query
Centralized and distributed
DB
AVG
D
D
D
Plan A
A
B
Sink
AC路由
S2
S1 C
A
B
Sink
DC路由
Data aggregation in DC routing
DD
LEACH
Sink
PEGASIS
Sink
3
1
5
0
2
4
Data aggregation based on security mode
ESPDA (Energy-efficient and Secure Pattern-based Data Aggregation) is also a clustering-based routing protocol.
QUERY PROCESSING AND DATA AGGREGATION
Reporter：Richard
June，2017
Contents
Part 01 Query Processing Part 02 Data Aggregation Part 03 Summary
Part 01
Query Processing