OTcl in Ns2

          In general, the OTcl is denoted as the extension of Tcl/Tk for object-oriented programming and short form of MIT object Tcl. Mainly, it is deployed in network simulator version 2 and it is capable to run the under Unix environment frequently. Ns are considered as the interpreter of OTcl along with the object libraries in network simulation. Additionally, we have highlighted some features based on OTcl in the following.

  • Convenient implementation
  • Without core hacks
  • 2000 lines of C
  • It is the compact and powerful object programming system
  • It creates Tcl syntax and concept which is importing another language
  • It is designed as the dynamic extend such as Tcl

OTcl Classes

         Mostly, the classes based on OTcl include the specific types of objects and they are utilized for the process of inheritance. They are used to inherit several abilities of regular objects over the objects and the inherited characteristics include several processes such as.

  • Initialization syntax
  • Combination
  • Dispatch
  • Method lookup

In addition, the classes based on OTcl are enlisted in the following,

  • Info
  • It is considered as the instproc that is deployed to query the class and to retrieve the information based on the existing process and the following is about the options based on object info instproc
  • instdefault
  • instbody
  • instargs
  • instcommands
  • instprocs
  • instances
  • heritage
  • subclass
  • superclass
  • Create
  • It is considered as the provision of mechanism based on the classes that are capable to create the some classes and objects. The process is invoked through the default and unknown instpro method
  • Alloc
  • It is deployed to allocate the new class object with the instance of class along with some superclass object and that is normally denoted as the class creation process

Creating and Structuring of Node

         The node is denoted as the standalone class based on OTcl. On the other hand, the most of the components of the node are themselves Tcl objects. In the similar way, the method of creating a node is identical simple call node directly in the class simulator using the Tcl command mentioned below.

set ns [new Simulator]
$ns node

            The structure of node consists of two Tcl objects and they are denoted as the address classifier and port classifier. In addition, both are deployed to determine the destination address and the target agent of each node. By default, nodes in Ns are created for unicast simulations. In order to support a multicast simulation, the simulation has to be created with an option multicast based on the command highlighted below.

set ns [new Simulator -multicast on]

          To this end, we hope that we have provided some required knowledge for the research developments based on OTcl in Ns2. On the whole, our research professionals provide assistance from the initial stage of research such as the selection of research topics to the research implementation and etc. So, contact us to reach the better heights in your research career.