108 Software Networks
– performance of control applications for mobiles;
– minimization of energy consumption by the terminals,
datacenters, etc.;
– availability;
– high security:
- m-commerce,
- m-Cloud access,
- m-payment.
The architectural differences we have described can be combined
to optimize the above criteria. Once again, we see the hierarchy of
datacenters ranging from enormous datacenters to the minuscule
“femto-datacenters”. It is not easy to optimize these environments,
even though the architecture is sometimes relatively well defined.
Often, it appears that the system of the future is Clouds that form
easily and are just as easily transformed, and is beginning to gain
momentum, known by the name “mobile Cloud”, which we shall now
examine.
5.2. Mobile Clouds
A “mobile Cloud” is a set of small datacenters which, once they
are connected, form a Cloud. The difficulty lies in the mobility of such
Cloudlets and the diversity of forms of mobility, so the Cloudlets can
attach and detach. If all the Cloudlets or mini-datacenters move
simultaneously, then it is a VANET (Vehicular Area Network) which
supports the mobile Cloud. On the other hand, if the mobiles which
transport the mini-datacenters move independently of one another,
with no coordination between them, the mobile Cloud has greater
difficulty in forming and evolving on the basis of the movements.
Figure 5.5 shows an example of a mobile Cloud, wherein each vehicle
has its own femto-datacenter.
www.it-ebooks.info