TOPAZ: An Open-Source Interconnection Network Simulator for Chip Multiprocessors and Supercomputers

Author(s):  
Pablo Abad ◽  
Pablo Prieto ◽  
Lucía G. Menezo ◽  
Adri´n Colaso ◽  
Valentin Puente ◽  
...  
Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2485
Author(s):  
Shakir Ullah ◽  
Saeed Ur Rehman ◽  
Peter Han Joo Chong

Light Fidelity (LiFi) is a new candidate for wireless networking that utilizes the visible light spectrum and exploits the existing lighting infrastructure in the form of light-emitting diodes (LEDs). It provides point-to-point and point-to-multipoint communication on a bidirectional channel at very high data rates. However, the LiFi has small coverage, and its optical gain is closely related to the receiver’s directionality vis-à-vis the transmitter, therefore it can experience frequent service outages. To provide reliable coverage, the LiFi is integrated with other networking technologies such as wireless fidelity (WiFi) thus forming a hybrid system. The hybrid LiFi/WiFi system faces many challenges including but not limited to seamless integration with the WiFi, support for mobility, handover management, resource sharing, and load balancing. The existing literature has addressed one or the other aspect of the issues facing LiFi systems. There are limited free source tools available to holistically address these challenges in a scalable manner. To this end, we have developed an open-source simulation framework based on the network simulator 3 (ns-3), which realizes critical aspects of the LiFi wireless network. Our developed ns-3 LiFi framework provides a fully functional AP equipped with the physical layer and medium access control (MAC), a mobility model for the user device, and integration between LiFi and WiFi with a handover facility. Simulation results are produced to demonstrate the mobility and handover capabilities, and the performance gains from the LiFi-WiFi hybrid system in terms of packet delay, throughput, packet drop ratio (PDR), and fairness between users. The source code of the framework is made available for the use of the research community.


Author(s):  
Ratish Agarwal ◽  
Piyush Kumar Shukla ◽  
Sachin Goyal

Communication is a very important area of research in the present era. Expansion of globalization and reduction in the cost of electronic devices has made communication very effective. A large number of researchers from academics and industries are involved in the research on communication and networks. Any novel idea has to be verified on the simulator. A number of simulators are available for network simulations such as Network Simulator (NS2 and NS3), OPNET, NetSim, OMNeT++, REAL, J-Sim and QualNet. NS is an open-source simulation tool that runs on Linux. It is a discreet event simulator for networking research and provides substantial support for simulation of routing, multicast and IP protocols. This chapter provides an overview of NS in a much simpler way. At the completion of this chapter readers will be able to write tcl script to simulate a scenario of network. Every simulation on NS generates a huge trace file; the study of this can be done with the help of AWK script.


2017 ◽  
Vol 34 (2) ◽  
pp. 193-201 ◽  
Author(s):  
Matheus A. Cavalcante ◽  
Helder A. Pereira ◽  
Raul C. Almeida

2016 ◽  
Vol 72 (12) ◽  
pp. 4601-4628 ◽  
Author(s):  
Francisco J. Andújar ◽  
Juan A. Villar ◽  
Francisco J. Alfaro ◽  
José L. Sánchez ◽  
Jesus Escudero-Sahuquillo

Author(s):  
Michael N Horak ◽  
Steven M Nowick ◽  
Matthew Carlberg ◽  
Uzi Vishkin

Sign in / Sign up

Export Citation Format

Share Document