Page 168 - Shaping smarter and more sustainable cities - Striving for sustainable development goals

end‐users (supply side: i.e.,
end‐users (demand side: i.e.,
users layer stakeholders'
inhabitants)
representatives)
presentations layer

Transportation, E‐government, E‐business, Safety and
applications layer
(software applications Emergency, Smart health, Tourism, Education, Smart
Building, Waste management , Smart Energy, Smart
offering SSC services)
water
business layer (business
Cyber‐security service logic) Access network (xDSL, FTTx,
processes that simulate
Transport network (SDH,
DWDM, IP, Microwave etc.)
Communications Network layer

WiFi, 2G/3G/4G, PLC etc.)

Data repositories
data layer
File repositories

Capillary Network (SCADA, sensor network,
HART, WPAN, video surveillance, RFID,
Barcode, GPS, etc.
sensing layer
Terminal node (sensor, transducer,
actuator, camera, RFID tag, barcode
symbols etc.

Figure 5 – A multi‐tier SSC ICT architecture from communications view, emphasizing on an
information flow perspective
Both the given figures concern valid representations of the same architecture view, one closer to
the language of infrastructure developers and the second more in line with the information system
developer’s context. The architecture view contains the following layers (as depicted in Figure 4):

 Sensing layer: This layer consists of terminal node and capillary network. Terminals (sensor,
transducer, actuator, camera, RFID reader, barcode symbols, GPS tracker, etc) sense the physical
world. They provide the superior “environment‐detecting” ability and intelligence for
monitoring and controlling the physical infrastructure within the city. The capillary network
(including SCADA, sensor network, HART, WPAN, video surveillance, RFID, GPS related network
etc.) connects various terminals to network layer, providing ubiquitous and omnipotent
information and data.

 Network layer: The network layer indicates various networks provided by telecommunication
operators, as well as other metro networks provided by city stakeholders and/or enterprise
private communication network. It is the information superhighway (infobahn), the network
layer data and support layer. The data and support layer makes the city “smarter”, its main
purpose is to ensure the support capabilities of various city‐level applications and services. Data
and support layer contain the data centers from industries, departments, enterprises, as well as
the municipal dynamic data center and data warehouse (etc), established for the realization of
data process and application support.

158 ITU‐T's Technical Reports and Specifications