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Update CHANGES.html and RELEASE_NOTES

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Tom Henderson
2021-01-04 10:36:01 -08:00
parent 2dd6ad74b3
commit e12c34e610
2 changed files with 65 additions and 18 deletions
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CHANGES.html
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@@ -54,40 +54,41 @@ us a note on ns-developers mailing list.</p>
<h1>Changes from ns-3.32 to ns-3.33</h1>
<h2>New API:</h2>
<ul>
<li>A model for TCP CUBIC has been added.</li>
<li>A model for <b>TCP CUBIC</b> (RFC 8312) has been added.</li>
<li>New <b>channel models based on 3GPP TR 37.885</b> have been added to support vehicular simulations.</li>
<b>Time::RoundTo (unit)</b> allows time to be rounded to the nearest integer multiple of unit</li>
<li><b>Time::RoundTo (unit)</b> allows time to be rounded to the nearest integer multiple of unit</li>
<li><b>UdpClient now can report both transmitted and received bytes.</li>
<li><b>UdpClient</b> now can report both transmitted and received bytes.</li>
<li>A new <b>MPI Enable()</b> variant was introduced that takes a user-supplied MPI_Communicator, allowing for partitioning of the MPI processes.</li>
<li>A <b>Length</b> class has been introduced to allow users to replace the use of raw numbers (ints, doubles) that have implicit lengths with a class that represents lengths with an explicit unit.</li>
<li>A flexible <b>CsvReader</b> class has been introduced to allow users to read in csv- or tab-delimited data.</li>
<li>The <b>ListPositionAllocator</b> can now input positions from a csv file.</li>
<li>A new trace source for DCTCP alpha value has been added to <b>TcpDctcp</b>.</li>
</ul>
<h2>Changes to existing API:</h2>
<ul>
<li>A new <b>TableBasedErrorRateModel</b> has been added for Wi-Fi, and the default values are aligned with link-simulation results from MATLAB WLAN Toolbox and IEEE 802.11 TGn.
</li>
<li>A new <b>LdpcSupported</b> attribute has been added for Wi-Fi in <b>HtConfiguration</b>, in order to select LDPC FEC encoding instead of the default BCC FEC encoding.
</li>
</ul>
<h2>Changes to existing API:</h2>
<ul>
<li> The signature of <b>WifiPhy::PsduTxBeginCallback</b> and <b>WifiPhy::PhyTxPsduBegin</b> have been changed to take a map of PSDUs instead of a single PSDU
in order to support multi-users (MU) transmissions.
</li>
<li> The wifi trace <b>WifiPhy::PhyRxBegin</b> has been extended to report the received power for every band.
</li>
<li> The wifi trace <b>WifiPhy::PhyRxBegin</b> has been extended to report the received power for every band.
</li>
<li>New attributes <b>SpectrumWifiPhy::TxMaskInnerBandMinimumRejection</b>, <b>SpectrumWifiPhy::TxMaskOuterBandMinimumRejection</b> and <b>SpectrumWifiPhy::TxMaskOuterBandMaximumRejection</b> have been added to configure the OFDM transmit masks.
</li>
</ul>
<h2>Changes to build system:</h2>
<ul>
<li></li>
<li>Waf has been upgraded to git development version waf-2.0.21-6-g60e3f5f4</li>
</ul>
<h2>Changed behavior:</h2>
<ul>
<li>The <b>default Wi-Fi ErrorRateModel</b> for the 802.11n/ac/ax standards has been changed from the NistErrorRateModel to a new TableBasedErrorRateModel. Users may experience a shift in Wi-Fi link range due to the new default error model, as <b>the new model is more optimistic</b> (the PER for a given MCS will degrade at a lower SNR value). The Wi-Fi module documentation provides plots that compare the performance of the NIST and new table-based model.</li>
<li>The default value of the <b>BerThreshold</b> attribute in <b>IdealWifiManager</b> was changed from 1e-5 to 1e-6, so as to the correct high order MCS.</li>
<li> Time values that are created from an int64x64_t value are now rounded to the nearest integer multiple of the unit, rather than truncated. Issue #265 in the GitLab.com tracker describes the behavior that was fixed. Some Time values that rely on this conversion may have changed due to this fix.</li>
<li>The default value of the <b>BerThreshold</b> attribute in <b>IdealWifiManager</b> was changed from 1e-5 to 1e-6, so as to correct behavior with high order MCS.</li>
<li> <b>Time values that are created from an int64x64_t value</b> are now rounded to the nearest integer multiple of the unit, rather than truncated. Issue #265 in the GitLab.com tracker describes the behavior that was fixed. Some Time values that rely on this conversion may have changed due to this fix.</li>
<li> TCP now implements the Linux-like <b>congestion window reduced (CWR)</b> state when explicit congestion notification (ECN) is enabled.</li>
<li> <b>TcpDctcp</b> now inherits from <b>TcpLinuxReno</b>, making its congestion avoidance track more closely to that of Linux.</li>
</ul>
@@ -118,6 +119,7 @@ by including flow-monitor.h you will need to change that to stats-module.h.
longer takes a WifiPhyStandard enum, but instead takes a similarly named
WifiStandard enum. If before you specified a value such as WIFI_PHY_STANDARD_xxx, now you must specify WIFI_STANDARD_xxx.
</li>
<li> The <b>YansWifiPhyHelper::Default</b> and <b>SpectrumWifiPhyHelper::Default</b> methods have been removed; the default constructors may instead by used.</li>
<li> <b>PIE</b> queue disc now uses <b>Timestamp</b> for queue delay calculation as default instead of <b>Dequeue Rate Estimator</b></li>
</ul>
<h2>Changes to build system:</h2>

63
RELEASE_NOTES
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@@ -9,25 +9,70 @@ http://www.nsnam.org including tutorials: http://www.nsnam.org/tutorials.html
Consult the file CHANGES.html for more detailed information about changed
API and behavior across ns-3 releases.
Release 3-dev
=============
Release 3.33
============
Availability
------------
This release is not yet available.
Supported platforms
-------------------
This release is intended to work on systems with the following minimal
requirements (Note: not all ns-3 features are available on all systems):
- g++-5.4 or later, or clang++-8 or later
- Python 3.5 or later
- (macOS only) Xcode 10.1 or later
This release has been tested on the following systems:
- Arch Linux with g++-10.2.0 and clang++ versions 8-11, Python 3.9.1
- Fedora 33 with g++-10.2.1 and clang++-11.0.0; Python 3.9.1
- Ubuntu 20.04 with g++-9.3.0 and Python 3.8.5
- Ubuntu 18.04 with g++-7.5.0 and Python 3.6.9
- Ubuntu 16.04.6 with g++-5.4.0 and Python 3.5.2
- Linux Mint 20 Ulyana with g++-9.3.0 and Python 3.8.5
- macOS 11.1 (Big Sur) with Xcode 12.3 (Apple clang-1200.0.32.28), Python 3.8.2 (system) and Python 3.9.1 (Homebrew)
- macOS 10.15.7 (Catalina) with Xcode 12 (Apple clang-1200.0.31.1, Python 3.9.1)
- macOS 10.13.6 (High Sierra) with Xcode 10.1 (Apple clang-1000.11.45.5, Python 3.7.1)
New user-visible features
-------------------------
- (wifi) A new table-based error model based on link simulations has been
added (TableBasedErrorRateModel) and made the default for 802.11n/ac/ax simulations.
- (wifi) It is now possible to select either BCC or LDPC FEC encoding.
- (mpi) A new Enable call was added that takes a user supplied MPI_Communicator, which enables (optional) partitioning of the MPI processes. See !389.
- (core) A new Length class has been added to represent lengths with an explicit unit, rather than the use of raw numbers (ints, doubles) with implicit length.
- (core) A flexible CsvReader class has been introduced to allow users to read in csv- or tab-delimited data.
- (lr-wpan) Added support for handling differences between RFC4944- and RFC6282-style IPv6 address expansion
- (mobility) The ListPositionAllocator can now input positions from a csv file.
- (tcp) A model for TCP CUBIC has been added.
- (mpi) A new Enable call was added that takes a user supplied MPI_Communicator, which enables (optional) partitioning of the MPI processes. See !389.
- (propagation) A channel condition model for vehicular scenarios was added. See !435
- (tcp) A model for TCP CUBIC congestion control has been added.
- (tcp) TCP handling of ECN has been improved with the addition of a Congestion Window Reduced state
- (tcp) TCP DCTCP includes a trace source for tracing the alpha value
- (wifi) A new table-based error model based on link simulations has been
added (TableBasedErrorRateModel) and made the default for 802.11n/ac/ax simulations.
- (wifi) Add error table support for LDPC FEC encoding (BCC or LDPC may now be selected)
- (wifi) Add PHY layer support for High Efficiency Multi Users [HE-MU] access, including High Efficiency Resource Units (HE RU) and PCAP support
- (wifi) Add option to configure the OFDM transmit spectrum mask
Bugs fixed
----------
- (wifi) Fix Minstrel HT statistics update window duration
- (wifi) Fix wrong calculations for 1024-QAM when using NistErrorRateModel
- (applications) #444 - Report Tx bytes from UdpClient
- (core) #265 - Time is not rounded when created from an int64x64_t
- (core) #277 - Make Time::As() print with autoscaled unit
- (core) #302 - Time is not rounded when created from an int64x64_t
- (internet) #272 - Add missing data to Ipv[4,6]PacketInfoTag
- (internet) !440 - Loopback IPv4 address should have HOST scope
- (lte) #273 - When removing LC, remove also its BSR
- (lr-wpan) #314 - Multicast/broadcast must not generate ACKs
- (mobility) #276 - Make EnableAsciiAll connect in a failsafe way
- (tcp) TcpCongestionOps objects can now be accessed by config paths
- (tcp) #783 - Update previousLost and priorInFlight on reception of ACK
- (wifi) #284 - Fix memory consumption issue for saturated devices
- (wifi) Fix Minstrel HT statistics update window duration
- (wifi) Fix incorrect calculations for 1024-QAM when using NistErrorRateModel
- (wifi) Fix maximum channel number that can be selected for the PHY
- (wifi) Set BER threshold for Ideal rate manager to 1e-6 to avoid high PER for high MCS values
- (wifi) Reduce precision to fix infinite loop when Ideal rate manager as used with Yans error rate model
- (wifi) Report reception of BAR to WifiRemoteStationManager
- (wifi) TXOP durations were not always being traced
Release 3.32
============