SDN (Software-Defined Networking) 25
with multicriteria objectives: only one criterion is taken into
account – e.g. performances, or energy expenditure. Energy
optimization asks for an urbanization definitely different of load
sharing – i.e. channeling the data streams along common paths in
order to be able to place a maximum number of physical machines on
standby. The difficulty in the latter case is being able to turn the
resources back on as the workload of the software networks increases
again. Certain machines, such as virtual Wi-Fi access points, are
difficult to wake from standby mode when external devices swish to
connect wirelessly. We need electromagnetic sensors that are capable
of detecting these mobile terminals and sending them an Ethernet
frame at the Wi-Fi access point with the function Wake-on-LAN.
2.3. NFV (Network Functions Virtualization)
The purpose of NFV (Network Functions Virtualization) is to
decouple the network functions from the network equipment. This
decoupling enables us to position the software performing the
functions of a device on a different machine than the device itself.
This means we can place the operational programs of a machine in a
datacenter within a Cloud. Standardization is being done by a working
group from the ETSI, which is a European standardization body, but
in this particular case, the project is open to all operators and device
manufacturers from across the world. Over two-hundred members are
taking part in this standardization effort. The objective of this
initiative is to define the architecture to virtualize the functions
included in the networking devices, and to clearly define the
challenges needing to be overcome. The standardization tasks are
being carried out by five separate working groups, described in detail
below.
The first group, “Architecture of the Virtualization”, has the
objective of producing a reference architecture for a virtualized
infrastructure and points of reference to interconnect the different
components of that architecture. The second group, “Management and
www.it-ebooks.info
with multicriteria objectives: only one criterion is taken into
account – e.g. performances, or energy expenditure. Energy
optimization asks for an urbanization definitely different of load
sharing – i.e. channeling the data streams along common paths in
order to be able to place a maximum number of physical machines on
standby. The difficulty in the latter case is being able to turn the
resources back on as the workload of the software networks increases
again. Certain machines, such as virtual Wi-Fi access points, are
difficult to wake from standby mode when external devices swish to
connect wirelessly. We need electromagnetic sensors that are capable
of detecting these mobile terminals and sending them an Ethernet
frame at the Wi-Fi access point with the function Wake-on-LAN.
2.3. NFV (Network Functions Virtualization)
The purpose of NFV (Network Functions Virtualization) is to
decouple the network functions from the network equipment. This
decoupling enables us to position the software performing the
functions of a device on a different machine than the device itself.
This means we can place the operational programs of a machine in a
datacenter within a Cloud. Standardization is being done by a working
group from the ETSI, which is a European standardization body, but
in this particular case, the project is open to all operators and device
manufacturers from across the world. Over two-hundred members are
taking part in this standardization effort. The objective of this
initiative is to define the architecture to virtualize the functions
included in the networking devices, and to clearly define the
challenges needing to be overcome. The standardization tasks are
being carried out by five separate working groups, described in detail
below.
The first group, “Architecture of the Virtualization”, has the
objective of producing a reference architecture for a virtualized
infrastructure and points of reference to interconnect the different
components of that architecture. The second group, “Management and
www.it-ebooks.info