Ns-3.26

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This page summarizes the release planning for ns-3.26 (planned for June 2016). The ns-3 release process is listed here and here.

Release goals

The following goals have been identified by maintainers.

Build system

• Upgrade Waf and bake build systems according to this functional specification for supporting contributed code

ns-3 core

To be determined

TCP models

Natale Patriciello, Anh Nguyen, Tom Henderson, Matthieu Coudron, and Amir Modarresi are working on the following.

1) Open tracker issues

• 2263: Support processing multiple TCP options in 1 header
• 2122: decouple TcpTxBuffer variables
• 2264: Possibility to setup Initial Sequence Number
• 1529: randomize TCP initial sequence number
• 2285: loss of TCP 3-way handshake calls receive callback to fire
• 1167: TCP socket deferring CLOSE forever
• 2133: In TCP close procedure, assert fail when receive in FIN_WAIT_2
• 2278: in TcpSocketBase, need to advance NextTxSequence
• 2256: TCPTxBuffer should be able to tell BytesInFlight
• 2220: RAM usage reduction through reduction of retx events
• 2214: TCP ScheduleNow for data transfer
• 1783: experiencing drops during FastRec causes Tcp cw to blow up

2) Try to merge as many TCP congestion control variants as are ready or nearly ready.

• BIC
• CUBIC
• Vegas
• Scalable
• Veno
• YeAH
• Illinois
• H-TCP: http://mailman.isi.edu/pipermail/ns-developers/2016-April/013541.html

3) work on SACK: https://codereview.appspot.com/283880043/

• General Scoreboard
• Tcp option SACK management
• Tcp option SACK implementation

MPTCP will not be merged for ns-3.26.

traffic-control module

Stefano Avallone (stavallo@unina.it) is leading ns-3.26 development for traffic control, and has the following goals:

• Add support for Byte Queue Limits (in progress)
• porting and polishing fq-codel (in progress)
• reviewing PIE contribution (in progress)
• introduce mq (a multi-queue queue disc configured by default on wifi, along with fq-codel)
• user priorities and QoS API
• provide a better solution for a couple of issues introduced by the requeue mechanism

lte module

To be determined

wifi module

To be determined

Release and development schedule

The following schedule is planned:

• May 11, 2016: New feature deadline.
• May 25, 2016: Planned code freeze date.
• June 1, 2016: Scheduled release date for ns-3.26

Help wanted

If you would like to help prepare the ns-3.26 release in some way, please contact Tom Henderson (tomhend@u.washington.edu).

Also, please check back at a later date as specific tasks may be listed here.