Page 255 - Shaping smarter and more sustainable cities - Striving for sustainable development goals

Figure 28 – Example installation

From an environmental point of view, to consume less electricity:
 It is required to consume less electricity per unit amount of transmission of data in order to
reduce the environmental burden.
 It is also required to use less electricity when some data is transmitted along the same distance.
 It is preferable to be able to obtain electricity autonomously using natural energy such as wind
power and energy from sunlight.

To be small and lightweight:
 It is required to be easily installed and used for temporary radio relays or live broadcast from the
events sites as well as the means of rapid network recovery in emergency where mobility
characteristic is required.
 It is preferable to be able to lessen the number of component parts or the amount of volume to
contain in order to reduce the environmental burden. For example, impulse radio wireless
technology allows the system not to use oscillators which are likely to be large‐size.

Connectivity to Internet
Internet connections through the many access networks listed before, are a solution for SSC data
transmission. As security is an extremely important element, Virtual Private Networks (VPN) are
necessary to send data over the Internet. Encryption in these VPN is vital for the safe transport of
data. A VPN is a private network in logical terms, mounted potentially on a shared medium.
The Internet solution is a very economical option compared to using private channels from MPLS or
Ethernet networks, but depends on the speed and availability of broadband Internet access. The
Virtual Private Network (VPN) perfectly fits the requirements: security, data encryption,
transparency and lower monthly costs.
Tasks that must satisfy a VPN are:

 Remote access to databases, servers, etc.
 Authentication of both ends of the connection (main office and remote office).

 Ability to send IP packets through a tunnel in the public network (Internet), so that the two
segments of the network interconnecting remote LAN does not appear to be geographically
separated.

ITU‐T's Technical Reports and Specifications 245