Saastra University Leverages NetSim for Research on Securing Femtocells

Femtocells have been proposed as solution for high-speed mobile network (i.e. LTE) bandwidth requirements. In this paper, researchers try to identify and mitigate a possible attack in femtocells where locational information about a femtocell user is disclosed


Developing the Multihop Algorithm for privacy: An algorithm is to be developed to provide privacy to the sender which would require no additional hardware.

Simulating and Analyzing the algorithm: This algorithm should then be implemented into the device code, simulated and analyzed for performance.

Use Case

Developing custom code: Source C files, Cellular.c, GSM.c, Handover.c and GSM_Channel.c of NetSim’s GSM library were modified . These codes were linked and debugged using NetSim’s project work environment.

Modeling network configurations: Custom network configurations were created using NetSim’s XML based network configuration files. Alcatel Lucent home cell v2 was modeled with a radius of 25 meters and with 15 users.

Generating performance metrics: Packet and event traces were used for calculating the sought network performance metrics namely, Average Number of Reflections, and Average Time Spent in Femto Cell.


Statistically analyzing performance: Since the trade off of the algorithm was increased delay, this was studied and found to be approx 50 ms, which could be afforded by the network architecture
“We chose NetSim given its extensive R & D capabilities in MANETs, WSNs, Cognitive Radio Networks and Cellular networks. NetSim has an easy to use UI for creating scenarios and modeling protocol & device parameters. The protocol library source codes are written in C and easily understandable. NetSim’s product features and quick support from their technical team makes it easier to simulate complex networking protocols which results in publishing quality research articles”
Dr.V.S.Shankar Sriram,
SAASTRA University, Thanjavur
The published research paper is available at 

Please contact us for more information about functionality or pricing, or to arrange a demonstration.                                 Email:, Visit:

Simulation of LTE Networks in NetSim

LTE, an acronym for Long Term Evolution, commonly known as 4G LTE, is a standard for wireless communication of high-speed data for mobile phones and data terminals. It is based on the GSM/EDGE and UMTS/HSPA network technologies, increasing the capacity and speed using a different radio interface together with core network improvements.

  • NetSim LTE implementation is per 3GPP TS standards covering
  • Devices – User Equipment (UE), E-UTRAN Node B (eNB), Mobility Management Entity (MME)
  • Protocol Stack covering NAS (Non access stratum), PDCP (Packet data convergence protocol), RRC (Radio resource control), RLC (Radio link control), Concatenation
  1. Mapping between logical channels and transport channels
  2. Multiplexing of MAC SDUs from one or different logical channels onto transport blocks (TB)
  3. De multiplexing of MAC SDUs from one or different logical channels from transport blocks (TB)
  4. Priority handling between UEs by means of dynamic scheduling
  5. Priority handling between logical channels of one UE
  6. Logical Channel prioritization
  • LTE PHY – OFDM-MIMO Downlink and SC-FDMA uplink, CQI – SNR


The complete white paper explaining the implementation of LTE in NetSim and detailed comparison against NS-3 test suite is available at

LTE is available with NetSim v8 which is expected to be shipped from mid august ’14.

Please contact us for more information about functionality or pricing, or to arrange a demonstration. Email:, Visit: