Page 172 - Unleashing the potenti al of the Internet of Things

3 Unleashing the potential of the Internet of Things

7.4 Sensor network common interface processing

A sensor network common interface processing provides the following functions for USN
applications and services:

– sensor network common interface processing;
– authentication and channel protection functions by cooperating with a security service.

7.5 Security service

The security service provides the following functions for protecting USN middleware:
– access control for protecting USN middleware from malicious attacks;
– secure channel for protecting information exchanged between USN middleware and
applications/sensor networks;
– secure channel for protecting information exchanged within USN middleware if USN
middleware functions are distributed over the networks.

8 Requirements for USN middleware
According to the functional model, the requirements for USN middleware are defined in terms of
interfaces, functions and security.

8.1 Interface requirements
– A standardized interface between the USN middleware and heterogeneous sensor networks
is required to be provided.
– A standardized interface for applications to access USN middleware is required to be
provided.

8.2 Functional requirements
– It is required to support sensor network metadata management.

– It is required to provide sensor network metadata directory service for obtaining sensor
network information.
– It is required to provide appropriate data filtering functions such as redundant RFID tag
data filtering and sensed data validation for removing unnecessary or erroneous data.
– It is required to provide sensor network monitoring and control function to effectively
utilize sensor network.
– It is required to support explicit request-reply query processing mode (pull-mode) and
implicit request-reply query processing mode (push-mode). An implicit request-reply query
processing means providing sensed data to USN application without any explicit request.
– It is recommended to provide a sensor data mining function.
– It is recommended to provide event generating and processing functions.
– It is recommended to provide a context-aware rule processing function for supporting
decision making of USN applications.
– It is recommended to provide service registration and discovery functions including both,
USN services and USN middleware services.

158 Rec. ITU-T Y.4104/F.744 (12/2009)