Update README

README.md

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 This is an [ns-3](https://www.nsnam.org "ns-3 Website") mmWave module for the simulation
 of 5G mmWave cellular networks. A description of this module can be found on [IEEExplore (open access)](https://ieeexplore.ieee.org/document/8344116/ "mmwave paper").
 
-The mmWave module for ns-3 can be used to simulate 5G cellular networks at mmWave frequencies. 
-This module builds on top of the LTE one, and currently includes features such as:
-- Support of a wide range of channel models, including the latest 3GPP model for frequency spectrum above 6 GHz. Ray tracing and measured traces can also be modeled.
-- Custom PHY and MAC classes, inspired to the PHY and MAC of 3GPP NR. They support dynamic TDD, and are parameterized and highly customizable in order to be flexible enough for testing different designs.
-- Custom schedulers for the dynamic TDD format
-- Carrier Aggregation at the MAC layer
-- Enhancements to the RLC layer with re-segmentation of packets for retransmissions
-- Dual Connectivity with LTE base stations, with fast secondary cell handover and channel tracking
-- Simulation of core network elements (with also the MME as a real node)
-
-The following papers describe in detail the features implemented in the mmWave module:
+The mmWave module for ns-3 can be used to simulate 5G cellular networks at mmWave frequencies. This module builds on top of the LTE one, and currently includes features such as:
+
+* Support of a wide range of channel models, including the model based on 3GPP TR 38.901 for frequencies between 0.5 and 100 GHz. Ray tracing and measured traces can also be used.
+
+* Custom PHY and MAC classes supporting the 3GPP NR frame structure and numerologies. They support dynamic TDD, and are parameterized and highly customizable in order to be flexible enough for testing different designs.
+
+* Custom schedulers for the dynamic TDD format
+
+* Carrier Aggregation at the MAC layer
+
+* Enhancements to the RLC layer with re-segmentation of packets for retransmissions
+
+* Dual Connectivity with LTE base stations, with fast secondary cell handover and channel tracking
+
+* Simulation of core network elements (with also the MME as a real node)
+
+The following papers describe in detail the features implemented in the mmWave
+module:
 - [End-to-End Simulation of 5G mmWave Networks](https://ieeexplore.ieee.org/document/8344116/ "comst paper") is a comprehensive tutorial with a detailed description of the whole module. We advise the researchers interested in this module to start reading from this paper;
 - [Integration of Carrier Aggregation and Dual Connectivity for the ns-3 mmWave Module](https://arxiv.org/abs/1802.06706 "wns3 2018") describes the Carrier Aggregation implementation;
-- [ns-3 Implementation of the 3GPP MIMO Channel Model for Frequency Spectrum above 6 GHz](https://dl.acm.org/citation.cfm?id=3067678 "wns3 2017") describes the implementation of the 3GPP channel model;
-- [Multi-Sector and Multi-Panel Performance in 5G mmWave Cellular Networks](https://arxiv.org/abs/1808.04905 "globecom2018") describes the multi-sector addition to the 3GPP channel model;
+- [Implementation of A Spatial Channel Model for ns-3](https://arxiv.org/abs/2002.09341 "wns3 2020") describes the integration of the spatial channel model based on the 3GPP specifications TR 38.901 V15.0.0;
 - [Performance Comparison of Dual Connectivity and Hard Handover for LTE-5G Tight Integration](https://arxiv.org/abs/1607.05425 "simutools paper") describes the Dual Connectivity feature.
 
+These other papers describe features that were implemented in older releases: 
+- [ns-3 Implementation of the 3GPP MIMO Channel Model for Frequency Spectrum above 6 GHz](https://dl.acm.org/citation.cfm?id=3067678 "wns3 2017") describes the implementation of the 3GPP channel model based on TR 38.900;
+- [Multi-Sector and Multi-Panel Performance in 5G mmWave Cellular Networks](https://arxiv.org/abs/1808.04905 "globecom2018") describes the multi-sector addition to the 3GPP channel model;
+
 If you use this module in your research, please cite
 M. Mezzavilla, M. Zhang, M. Polese, R. Ford, S. Dutta, S. Rangan, M. Zorzi, _"End-to-End Simulation of 5G mmWave Networks,"_ in IEEE Communications Surveys & Tutorials, vol. 20, no. 3, pp. 2237-2263, thirdquarter 2018. [bibtex available here](https://ieeexplore.ieee.org/document/8344116/)
 
@@ -164,4 +174,4 @@ familiar with it.
 
 If you have successfully installed mercurial, you can get
 a copy of the development version with the following command:
-"hg clone http://code.nsnam.org/ns-3-dev"
+"hg clone http://code.nsnam.org/ns-3-dev"