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The project aims to implement a wireless network simulator, with definition of layers: physical, link and network. Using concepts such as hosts, communication protocols, position of devices in an environment, in order to evaluate the performance of the system.

The concept of layers in computer networks defined in some models, for example OSI and TCP/IP, is used to separate tasks into modules with well-defined protocols, increasing system performance and facilitating communication between different platforms.

The physical layer is responsible for sending and receiving packets from one physical interface to others, usin the following methods.

  receive_pck()
  send_pck()

The physical layer has an x and y position, signal range and a list of neighbors. When sending a packet, the physical layer checks the global list of hosts that are within reach.

The link layer controls the flow of reception, delimitation and transmission of frames and establishes a communication protocol (Media Access Control) between directly connected systems. This layer has three methods:

  receive_pck_physical()
  sending_request()
  send_pck_physical() 

The master coordinator used as the MAC protocol stores a list of the packages to be sent and allows the forwarding of only 1 at a time, respecting the order of arrival, to avoid signal collisions.r coordinator use as MAC Protocol is responsible for keeping a list of the packages to be sent, allowing the forwarding of only 1 at a time, respecting the order of arrival, to avoid signal collisions.

The network layer determines how packets are routed from origination to destination.

The Dynamic Source Routing Protocol (DSR) is a routing technique, which the sender determines the complete sequence of host responsible for forwarding the packets to the receiver. Then, each node stores a routing table, which contains the routes known to each.

Packages that travel over the network can be classified into three categories:

• RREQ: Route Request Packet
• RREP: Route Reply Packet
• DATA: Data Packet

Create a host by writing new_host = host(host_id, x_position, y_position, master, range_ratio) into the main.py. The master is the entity that decides which host will send data, so you must create only one master.

Create a data package for any host by : host_name.send_message("message content", receiver_host_id)

Go into the file project then open the terminal and write the command bellow :

python main.py

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Copyright © 2020 Marismar da Costa Silva, Gustavo Eraldo da Silva.
This project is MIT licensed.