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5G NR

NetSim is the industry's leading 5G NR simulation tool used by 400+ organizations across 25+ countries.

Our customers include:

  • Mobile network operators (MNOs) or Cellular service providers (CSPs)
    • Leverage off-the-shelf models and analysis tools provided with NetSim to investigate Network Capacity, Peak throughputs, End-to-end latencies, etc.
  • Equipment manufacturers
    • Test technology and network designs before production
    • Generate synthetic data to train AI/ML models
  • Universities and Research institutions
    • Accelerate R & D
    • Write your own algorithms by modifying NetSim source codes

NetSim supports the latest advances in 5G including MIMO, Beamforming, mmWave Propagation, SA/NSA modes and comes with a range of inbuilt example scenarios.

Check out NetSim Emulator to understand how NetSim Simulator can be connected to real devices running live applications.

NetSim’s 5G NR Design Window

Overview

  • End-to-End simulation of 5G networks
  • Devices: UE, gNB, 5G Core devices (SMF, AMF, UPF), Router, Switch, Server
  • GUI based with Drag and Drop, Packet Animator and Results Dashboard
  • 5G library interfaces with NetSim's proprietary TCP/IP stack providing simulation capability across all layers of the network stack
  • Discrete Event Simulation (DES) with event level debugging to inspect and control the simulation
  • Application Models - FTP, HTTP, Voice, Video, Email, DB, Custom and more
  • Packet level simulation with detailed packet trace, event trace and NR log file
  • SA and NSA architectures based on 3GPP standards
  • Protocol source C code shipped along with (standard / pro versions)
NetSim Results Dashboard and Plots Window

Devices in NetSim 5G NR Library

  • UE
  • gNBs
  • 5G Core: AMF, SMF, UPF
  • Buildings to differentiate between outdoor and indoor propagation

Specifications

  • 5G Core (Based on TS23.501, TS23.502) functions and interfaces:
    • Interfaces: N1/N2, N3, N4, N6, N11, XN
  • 5G NSA deployment architecture (in addition to existing SA mode) for LTE - 5G dual connectivity, to leverage existing LTE RAN/EPC deployments. Support for options 3, 3a, 4, 4a, 7 and 7a
  • RLC based on specification 38.322
    • TM (Transparent Mode): No RLC Header, Buffering at Tx only, No Segmentation/Reassembly, No feedback (i.e, No ACK/NACK)
    • UM (Unacknowledge Mode): RLC Header, Buffering at both Tx and Rx, Segmentation/Reassembly, No feedback (i.e, No ACK/NACK)
    • Transfer of upper layer PDUs
    • Segmentation and reassembly of RLC Service Data Units (SDU)
    • RLC SDU discard
    • RLC buffer
    • t-reassembly
    • ARQ
    • t-pollRetransmit
    • Protocol Data Unit (PDU)
    • TMD PDU
    • UMD PDU
  • PDCP based on specification 38.323
    • Transmit PDCP SDU
    • PDCP Association
    • Maintenance of PDCP sequence numbers
    • Discard Timer
    • Transmission Buffer
    • PDCP Entity
    • t-Reordering Timer
    • Receive buffer
  • MAC Layer based on specification 38.321
    • Handover: New UI variables (i) Handover interruption time, (ii) Handover margin, and (iii) Time to Trigger
    • Outer loop link adaptation (OLLA): Once the t-BLER is set an initial MCS is "guessed". Subsequently, the MCS is dynamically adjusted based on an outer-loop link adaptation algorithm that uses HARQ ACK-NACK messages
    • Mapping between logical channels and transport channels
    • Multiplexing/De-multiplexing of MAC SDUs from one or different logical channels onto transport blocks (TB) to be delivered to the physical layer on transport channels
    • MAC Scheduler featuring Round Robin, Proportional Fair, Max Throughput and Strictly fair algorithms
    • Link Adaptation to change MCS based on CQI
  • PHY Layer
    • Flexible sub-carrier spacing in the NR frame structure using multiple numerologies.
      • FR1 numerology µ = 0, 1, 2
      • FR2 numerology µ = 2, 3
    • All FR1 and FR2 operating Bands in both TDD and FDD
    • Carrier aggregation: Intra-band and Inter-band
    • Radio measurements:
      • SNR, RSSI, Pathloss, ShadowFading Loss, BeamformingGain
      • CQI, MCS
      NetSim 5G Data Files
    • Uplink and downlink physical channel
    • Frame structure and physical resources
    • MIMO
      • gNB antenna count supported 1, 2, 4, 8, 16, 32, 64, 128
      • UE antenna count supported 1, 2, 4, 8, 16
    • MIMO Spatial channel model
      • MIMO Spatial Channel Model (SCM), i.e., the channel is represented by a matrix H, whose entry (t, r) models the channel between the t-th and the r-th antenna elements at the transmitter and the receiver, respectively
      • Gaussian channel with Rayleigh fast fading: i.i.d Complex Normal (0, 1) channel (H-matrix) that changes independently every coherence time.
      • Beamforming gain per the Eigen values of the Gram (Wishart) matrix
    • Ability to input per gNB pathloss files from 3rd party software tools like MATLAB
    • Downlink Interference: Modified Wyner model, Exact geometric
    • Uplink Interference: Interference over Thermal
    • HARQ with soft combining
    • Block error (BLER)
      • Users can set a target BLER
      • BLER will be looked up from SINR-BLER data tables
      • NetSim has exhaustive SINR-BLER data for various transport block sizes for all MCSs (1, 2, ..., 28) for Base graphs (1, 2) for all three tables (1, 2, 3). In total 28*3*2 = 168 files
      • SINR-BLER data generated using an in-house proprietary link-level simulation program. The results have been carefully validated against published literature
    • Code block segmentation: The transport block is split into code blocks (CBs). Then CBs are grouped into code block groups (CBGs) and transmitted over the air interface.
    • PHY layer modulations supported
      • BPSK
      • QPSK
      • 16QAM
      • 64QAM
      • 256QAM
  • RF propagation
    • Log distance mean pathloss
    • Log normal shadowing
    • mm-Wave Propagation models (Based on 3GPPTR38.900 Channel Model)
      • Environment
        • Rural Macrocell
        • Urban Macrocell
        • Urban Microcell
        • Indoor Office – Mixed office, Open office
      • UE Position
        • Indoor
        • Outdoor
      • LOS State
        • LOS (Line of Sight)
        • NLOS (Non-Line of Sight)
      • Outdoor to indoor model
        • Highloss Model
        • Low Loss model

    • Featured Examples

    • Understand 5G simulation flow through LTENR log file
    • Effect of distance on pathloss for different channel models
      • Rural-Macro
      • Urban-Macro
      • Urban-Micro
    • Effect of UE distance on throughput in FR1 and FR2
      • Frequency Range - FR1
      • Frequency Range - FR2
    • Impact of MAC Scheduling algorithms on throughput, in a Multi UE scenario
      • Round Robin
      • Proportional Fair
      • Max Throughput
      • Fair Scheduling
    • Max Throughput for various bandwidth and 𝝁 configurations
    • Max Throughput for different MCS and CQI
    • Outdoor vs. Indoor Propagation
      • Outdoor
      • Indoor
    • 4G vs. 5G: Capacity analysis for video downloads
      • 4G
      • 5G
    • 5G Peak Throughput Analysis
      • 3.5 GHz n78 band
        • 100-Mhz no pathloss with 4:1 DL-UL ratio
        • 50-Mhz no pathloss with 4:1 DL-UL ratio
      • 26 GHz n258 band
        • 400-Mhz no pathloss with 4:1 DL-UL ratio
        • 200-Mhz no pathloss with 4:1 DL-UL ratio
    • gNB Cell Radius for Different Link Budgets
      • 3.5 GHz n78 band (C band)
      • 26 GHz n258 band (mmWave band)
    • Impact of numerology on a RAN with DL/UL applications involving phones, sensors and cameras
    • UE Movement vs Throughput
    • 5G KPIs for single and multi-UE scenarios