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Kategorie: Diplomové, bakalářské práce |
Tento dokument chci!
Tato práce zkoumá vhodnost a požadavky návrhu simulací pro simulátor NS-3 pro případ bezdrátových sítí používaných v měřící infrastruktuře společnosti Kamstrup. V práci jepopsán simulátor NS-3 a je vytvořena základní implementace dvou protokolů. WirelessM-Bus jako příklad jednosměrného protokolu pro zařízení napájené z baterií. Simulace Wireless M-Bus je porovnána s daty naměřenými v reálném systému. NS-3 poskytuje flexibilní prostředí pro vývoj simulací různých síťových protokolů, včetně těch určených pro sítě inteligentních měřidel.
• The Object class and its derived classes can use the NS-3 attribute system,
the object aggregation and the smart-pointer counting system. Also most the classes the NS-3
hierarchy inherit from it.3.
• define packet encapsulation structure, the classes can inherit from Header
and Trailer able easily add and read header and trailer fields from
the packets.
• There are existing models for propagation, error generation, energy consump-
tion and other phenomena. That makes
it the basic choice for most new classes. new type address is
not created subclass the Address class, but new base class. case a
new model general type, such new propagation model, can used a
16
. The existing models are usually defined with a
common parent class, therefore possible create new implementa-
tion and plug into other models without changing them. That being said, there are many choices NS-3
classes new model can inherit from, depending the character the future
model.
• Addresses can represented the Address class.
• When creating new protocol model, useful inherit from the NetDevice,
Channel and Application classes order use interface consistent with
many existing models. This
new base class then implements methods ConvertTo and ConvertFrom that
convert between the specific address type and object the generic Address
class. When creating
a model, important consider functionality, reusability and dependencies, as
stated the NS-3 Manual [1].
2.
The newly defined model has plugged into the simulation. (The Packet class therefore does not have specialized, as
all packets are built adding headers and trailers).2.3 Creating New Model
NS-3 already offers wide range existing models. However, does offer interfaces adhere and classes
to inherit order save effort and make the model more useful.with each Node and chaining the models for each layer each Node, need be
implemented.
As mentioned, NS-3 does not actually impose much limitations how the mod-
els should implemented. When there feature that
none the existing models support, protocol that does not have model yet,
it becomes necessary create new model customize existing one. example of
an inheritance hierarchy, showing the propagation loss parent class, the
Figure 2
