5G/6G

NetSim is the industry's leading system level simulator for modeling and simulation of 5G/6G networks, and allows users to:

Create network digital twins to optimize protocol and application performance
Design new protocols and technologies, as well as evaluate changes to existing ones
Plan mobile network deployments that accurately incorporate wireless propagation impairments.

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 and demonstrate designs in realistic scenarios 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/6G including AI/ML in the RAN, MIMO, Beamforming, Network Slicing, SA/NSA modes, BLER, HARQ, Link Adapatation, FR1 & FR2, DL and UL Interference, Load balancing, Traffic steering, Mobility, Handover and comes with a range of example scenarios.

Overview

End-to-End, full stack, packet level simulation of 5G networks
System level simulation with link level abstractions
Devices: UE, gNB (Omni, sector), 5G Core devices (SMF, AMF, UPF), Router, Switch, Server
Intuitive user interface with drag-and-drop functionality, results dashboard, and interactive plots window
Traffic Simulation: FTP, HTTP, Voice, Video, Email, Gaming, and Custom traffic types with user configurable data rate, packet size, inter packet arrival times, etc.
Telemetry: Radio measurements, Radio resource allocation, Packet Trace
Protocol source C code included
External interface to Python

NetSim Results Dashboard and Plots Window

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 38.322)
- TM (Transparent Mode), UM (UnAck mode), AM (Ack mode)
- Segmentation and reassembly of RLC SDUs
- t-reassembly and t-pollRetransmit
PDCP (based on 38.323)
- Maintenance of PDCP sequence numbers
- Discard Timer, t-Reordering Timer
- Transmit buffer and receive buffer maintenance
MAC Layer
- Handover:
  - Inter frequency and intra frequency handovers
  - A3 Event based
  - Configurable parameters:
    - Handover interruption time
    - Handover margin
    - Time to Trigger
- 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, and Max C/I algorithms (Detailed explanation)
- Link Adaptation
- Network Slicing
  - Slice Types: BE, eMBB, URLLC, MIoT, V2X
  - Static resource sharing based on % of resources to be allocated
  - Dynamic resource sharing based on an online machine learning algorithm
PHY Layer
- Uplink and downlink physical channel
- Frame structure and physical resources
- Flexible sub-carrier spacing in the NR frame structure using multiple numerologies.
  - FR1 numerology µ = 0, 1, 2
  - FR2 numerology µ = 2, 3
- FR1 bands
  - TDD: n34, n38, n39, n40, n41, n50, n51, n77, n78 and n79
  - FDD: n1, n2, n3, n5, n7, n8, n12, n20, n25, n28, n66, n70, n71 and n74
- FR2 bands
  - TDD: n257, n258, n259, n260, n261, n262 and n263
- Carrier aggregation: Intra-band and Inter-band
- Radio measurements logged every TTI:
  - SINR, SNR, Rx signal level, Pathloss, ShadowFading loss, Beamforming gain
  - CQI, MCS
- 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.
  - Digital 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: Exact geometric, Interference over Thermal
- 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).
  - 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
- Reyleigh fading
- 38.900 Propagation models
  - 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

Effect of distance on pathloss for different channel models in Urban and Rural environments
Effect of UE distance on throughput in FR1 and FR2
Impact of MAC Scheduling algorithms on throughput, in a Multi UE scenario
- Round Robin
- Proportional Fair
- Max Throughput
Max Throughput for various bandwidth and numerology configurations
Max Throughput for different MCS and CQI
Outdoor vs. Indoor Propagation
4G vs. 5G: Capacity analysis for video downloads
5G Peak Throughput Analysis
- 3.5 GHz n78 band
  - 100-MHz with 4:1 DL-UL ratio
  - 50-MHz with 4:1 DL-UL ratio
- 26 GHz n258 band
  - 400-MHz with 4:1 DL-UL ratio
  - 200-MHz 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