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5G K-SimSys


The 5G K-SimSys is a system-level simulator for mobile telecommunication system with multi-cell and multi-users scenarios. Under the varying other-cell interference and received signal strength in mobile stations, MAC-layer functionalities for the radio resource management in line with mobile links are simulated for evaluating the system-level performance, including the average system throughput, spectral efficiency, latency, and other related performance metrics. It also imports the 5G K-SimLink for PHY abstraction to support link-to-system mapping.


Category Scope
Network configuration

TR 38.802-based

  • Indoor hotspot, Dense urban, Rural, Urban macro
Carrier frequency

TR 38.802-based

  • 700MHz, 4GHz, 30GHz, 70GHz

TR 38.802-based

  • Up to 1GHz
Channel model

TR 38.802, TR38.901-based

  • Below/above 6GHz: Indoor hotspot, Dense urban, Rural, Urban macro
Hybrid beamforming

TR 36.897-based

  • - Beamformed CSI-RS
Beam management

TR 38.802-based

  • Beam determination, Beam measurement, Beam reporting
Traffic model

TR 38.802-based

  • Full buffer, Non-full buffer model

TS 38.211-based

  • 15kHz, 30kHz, 60kHz, 120kHz, 240kHz
Transmission scheme

TS 38.214-based

  • DL, UL codebook/non-codebook



The 5G k_SimSys consists of 15 modules, each of which is classified by its own object and purpose. The object identified by its own purpose, including simulation top, network configuration, channel model, radio resource management, and link performance, implementing the diffrent functionality in the simulator. Thanks to the well-defined & flexble structure, users cna add, modify, and expand the details of individual module to be suited to the different system and service scenarios.


Forward Compatible Modular Design

The baseline system models for the 5G K-SimSys include 3GPP LTE-A Pro and New Radio (NR) specifications. Based on our open/modular/flexible design philosophy, a system engineer can reuse our baseline simulator by adding, modifying, and expanding as required in the process of evaluation and optimization, without starting from the scratch. In other words, all modules are reusable while fully exploiting the shared knowledge.


Simulation Procedure

The 5G-K SimSys is conforming to the standardized evaluation methodologies for IMT-2020 in ITU-R Working Party 5D. Its procedure include initialization of input parameters, placemen t of BSs and MSs, calculation of long-term channel, cell association, calculation of short-term channel, feedback from MSs, scheduling, and measurement of performance metric. Each step calls their own functions to achieve its own goal. Each iteration, equivalently a single loop from PlaceMS to Measure, corresponds to a transmission time interval (TTI).



UMi-6GHz Calibration

spectral efficiency: 5G eMBB scenarios

Average cell throughput: 5G URLLC scenarios


Additional Features : Link-to-System mapping

Technical report and mapping parameters below illustrates the mapping methods from K-SimLink to K-SimSys


Source Code Download Techinical Report Download Mapping Parameters Download

Additional Features : Random access

The following figure illustrates a methodology to emulate the Preamble and PUSCH resource usage over time for bursty machine type communication (MTC) traffic when the Access Class Barring (ACB) mechanism is optimally controlled for random access procedure.

Source Code
User Manual



5G K-Simlator

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