5G-LENA

ns-3 module to simulate 3GPP 5G networks.NA
(4)

The NR module is a pluggable module to ns-3 that can be used to simulate 5G New Radio (NR) cellular networks. The simulator is the natural evolution of LENA, the LTE/EPC Network Simulator, but its development started from the mmWave module because it was more advanced in terms of beamforming, TDD, 3GPP channel models for above 6 GHz bands, and wide bandwidth operation. It incorporates fundamental PHY-MAC NR features aligned with 3GPP NR Release-15.

The current model is based on ns-3.30 release and supports the following features:

  • Non-Standalone Architecture (NSA) architecture: 5G RAN and 4G EPC

  • Flexible and automatic configuration of the NR frame structure through multiple numerologies

  • Time-Division Multiple Access (TDMA) and Orthogonal Frequency-Division Multiple Access (OFDMA)-based access with variable TTIs and single beam capability

  • Redesign of the MAC layer, including flexible MAC schedulers that simultaneously consider time- and frequency-domain resources (resource blocks and OFDM symbols) both for TDMA and OFDMA-based access schemes with variable TTI

  • UpLink (UL) grant-based access scheme with scheduling request and 3GPP-compliant buffer status reporting

  • NR-compliant processing timings

  • Bandwidth Part (BWP) managers and the architecture to support operation through multiple BWPs

  • NR PHY layer abstraction, considering LDPC codes, MCS Tables 1 and 2 (up to 256-QAM), LDPC base graph selection and NR block segmentation (to be released)

  • NR-U extension to operate in unlicensed spectrum, through multiple channel access managers, including duty-cycling as well as Listen-Before-Talk (LBT)-based procedures (to be released)

Publications

Please refer to the following publications for further information about the capabilities, implementation model and validation details of the 5G-LENA Simulator:

  • N. Patriciello, S. Lagen, B. Bojovic, L. Giupponi, An E2E Simulator for 5G NR Networks, Elsevier Simulation Modelling Practice and Theory (SIMPAT), vol. 96, 101933, Nov. 2019

  • N. Patriciello, S. Lagen, L. Giupponi, B. Bojovic, The impact of NR Scheduling Timings on End-to-End Delay for Uplink Traffic, in Proceedings of IEEE Global Communications Conference (IEEE GC), 9-14 December 2019, Waikoloa (HI, USA).

  • N. Patriciello, S. Lagen, L. Giupponi, B. Bojovic, An Improved MAC Layer for the 5G NR ns-3 module, in Workshop on ns-3, 19-20 June 2019, Florence (Italy).

  • N. Patriciello, S. Lagen, L. Giupponi, B. Bojovic, 5G New Radio Numerologies and their Impact on the End-To-End Latency, in Proceedings of IEEE International Workshop on Computer-Aided Modeling Analysis and Design of Communication Links and Networks (IEEE CAMAD), 17-19 September 2018, Barcelona (Spain).

  • B. Bojovic, S. Lagen, L. Giupponi, Implementation and Evaluation of Frequency Division Multiplexing of Numerologies for 5G New Radio in ns-3, in Workshop on ns-3, 13-14 June 2018, Surathkal (India).

If you use this module in your research, please cite N. Patriciello, S. Lagen, B. Bojovic, L. Giupponi, An E2E Simulator for 5G NR Networks, Elsevier Simulation Modelling Practice and Theory (SIMPAT), vol. 96, 101933, Nov. 2019. Available here: http://arxiv.org/abs/1911.05534 .

Future work

The following features are intended to be added to the project in the future:

  • NR PHY layer abstraction (already done, will be released soon)

  • NR-U extension (already done, will be released soon)

  • Configurable TDD patterns

  • NR FDD

  • NR dynamic TDD with inter-cell interference coordination

  • General subband managers that jointly manage component carriers and BWPs

  • NR V2X extension

About the Model:

The model is being developed and maintained by the Mobile Networks group CTTC (Centre Tecnològic de Telecomunicacions de Catalunya). Its development was initially funded by InterDigital, and continues with funding from the Lawrence Livermore National Lab (LLNL) and a grant from the National Institute of Standards and Technologies (NIST).

NR-v0.2

Works with ns-3.29

Release Notes

<p>This release adds new features, including NR frame structure, support of numerologies, flexible TTI, mini-slots, mixed UL-DL slot formats, OFDMA- and TDMA-based access, a selection of schedulers, NR timings, FDM of numerologies, and UL standard-compliant scheme with SR/UL-grant/BSR.</p>

NR-v0.3

Works with ns-3.30

Release Notes

<p>This release adds new features, including a new MAC/PHY state machine to control channel access, an updated channel model, with a separate procedure for beamforming and the possibility to compute UE/UE and gNB/gNB interferences, and the interface for the new NR L2SM.</p>

To get the software, please follow the instructions here: [https://5g-lena.cttc.es/download/](https://5g-lena.cttc.es/download/). The instructions to download our customized ns-3-dev as well as the NR module, are available here: [https://cttc-lena.gitlab.io/nr/getting-started.html](https://cttc-lena.gitlab.io/nr/getting-started.html)

To report bugs, please open an issue in the module GitLab repository.

Contributions to the module are welcome. To do so, please make a pull request against the master branch on the GitLab repository.

This ns-3 extension is one or more contributed modules.

No download available.