CEWiT   is   an   autonomous research organization which was  set  up  by   Ministry  of Communication   and   IT  in   partnership  with  the  Indian telecom  industry .


CEWiT’s  vision is to provide technological  leadership to  the Indian wireless industry. Read more


Training program for Telecom Equipment Vendor
Monday, 07 September 2015
A team of engineers from CEWiT conducted a 4 day training program for Telecom Equipment Vendor in Bangalore from Aug 25 - 28. The topics covered included LTE fundamentals, Broadband Wireless Simulator (BWSIM) and 4G RAN... Read more...
LTE-WiFi Workshop
Wednesday, 03 June 2015
CEWiT along with IIT Bombay conducted a workshop on "LTE and WiFi interconnecting and coexistence" at IIT Bombay, on June 3, 2015. It showcased the research output from the collaborative work done on the topic by teams... Read more...
Workshop on India-EU cooperation on ICT Standardisation
Tuesday, 19 May 2015
A Workshop was conducted by TSDSI at Delhi in cooperation with ETSI on India-EU cooperation on ICT Standardisation on May 19, 2015. CEWiT along with other TSDSI members have submitted ideas for cooperation in 5G areas.
Workshop on BWSIM/LTE to Vellore Institute of Technology, Vellore
Saturday, 26 July 2014
One day workshop on BWSIM/LTE was conducted at Vellore Institute of Technology, Vellore, one of the premium engineering colleges in Tamil Nadu, on 18 July 2014.    


An advanced simulation platform for 4G and 4G Advanced wireless technologies.










A decade ago, Wireless communicaion mainly concentrated on voice and low bandwidth data rate applications. But the usage of Internet led to attempts in converging these two areas. Internet medium generally requires a large bandwidth of hight data rate applications and an error free transmission. But scarcity of bandwidth and fading introduced high errors, calling for the need of efficient techniques to provide high data rate application.


Orthogonal Frequency Division Multiplexing (OFDM) that converts the frequency selective channel into narrow-band flat fading channels is considered to be one of the better solutions. This advantage along with the advancement in VLSI tehcnology made broadband a possible system. 


This influenced in the formation of an IEEE committee and the result is a standard based on OFDM called IEEE802.16, which initially concentrated on stationery users (IEEE802.16d) and then moved to include mobile application (IEEE802.16e) and now to an enhanced broadband mobile applications ( IEEE802.16m).


Another International Standard developing organisation called the Third generation partnership project (3GPP) is also in the proces of defining the Long Term Evolution (LTE) for 3G radio access. The main targets of this evolution concern increased data rates, improved spectrum efficiency, improved coverage and reduced latency. This is also an OFDM based technology.


Due to emergence of multiple standards it is necessary to have a common platform to understand the performance and to compare various standards. This will be helpfull for the operator to decide on the standards to adopt for their service, and to the vendors in their product development. This is the inspiration for the development of Broadband Wireless Simulator (BWSim).  



Broadband Wireless Simulator (BWSim) is a OFDM technology based wireless simulator. It currently supports IEEE802.16e and 3GPP-LTE based system and link simulation. It may also implement any of the potential standards based on OFDM technology that emerge in future.


The current version of simulator concentrates maily on the physical layer aspects, and some of the MAC related issues. It enables the study of the system performance under realistic-like situations. The simulator allows user to simulate an OFDM based system in the multi-cellular environment under different channel conditions, in the presence of interference. The simulator was written in a plug-n-play fashion which ensures the reusability of the different common blocks between IEEE802.16e and LTE. It outputs different performance indicators like BER, FER, throughput, SINR distribution etc.



Currently BWSim supports IEEE802.16e and LTE standards based system simulations with both Up-link and Down-link support. It could be run in both system level and link level simulation modes. It requires few parameters to be configured to set up the simulation environment and modes. The parameters like cell architecture, antenna configurations, channel models, transmitter and reciver parameters with simulation duration have to be set.

Present version has a simple menu based user interface to provide all these inputs to the simulator. Currently a minimal set of relevant parameters are alone provided for use and the extensive other configurations can be included on demand. Documents are provided to help user understand the features of the BSWim, its installation and usage.