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 RELEASE NOTES of the ns-3 LTE module

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This file documents the user-visible features that have been added

within each release of the ns-3 LTE module.

Milestone 6 (M6) release of the LENA project (April 30, 2013)

================================================================

 - PHY support for UE measurements (RSRP and RSRQ)

 - RRC support for UE measurements (configuration, execution, reporting)

 - Automatic Handover trigger based on RRC UE measurement reports

Milestone 5 (M5) release of the LENA project (January 23, 2013)

================================================================

 - MIMO model

 - HARQ model integrated with error model

 - Control Channel and Reference Signals models

 - MAC Random Access model with protocol interference model

   for preamble collisions

 - RRC implementation with new UE and ENB state machines and

   ASN.1-encoded RRC PDUs sent over Signaling Radio Bearers

 - RLC TM model

 - MME, S1-AP and S11 logical models

 - X2 implementation supporting handover and SON primitives

 - additional KPIs: RSRP & SINR traces, PHY tx/rx traces,

   SRB stats

 - several bug fixes

GSoC 2012 release (merged into ns-3-dev on December 2012)

=========================================================

 - Maximum Throughput (MT) Scheduler

 - Throughput to Average (TTA) Scheduler

 - Blind Equal Throughput (BET) Scheduler

 - Token Bank Fair Queue (TBFQ) Scheduler

 - Priority Set Scheduler (PSS)

Milestone 4 (M4) release of the LENA project (December 15, 2011)

================================================================

+ LTE Radio Protocols:

  - RLC/UM

  - RLC/AM

  - PDCP

+ EPC data plane:

  - S1-U interface with GTP-U tunneling

  - SGW/PGW node

  - TFT classifiers

  - mapping of EPS bearers to Radio Bearers

  - integration with ns-3 Ipv4 and ns-3 applications

+ Propagation Models:

  - revised trace-based fading model with new traces

  - new buildings pathloss model 

Milestone 1 (M1) release of the LENA project (June 17, 2011)

============================================================

Here is a summary of the new features available in the LTE module with

this release:  

 - uplink PHY and MAC properly implemented including Adaptive

   Modulation and Coding (previously only downlink was supported)  

 - interference modeling was implemented: it is now possible to

   simulate multi-cell scenarios with inter-cell interference

 - flexible spectrum model: it is now possible to specify the carrier

   frequency and bandwidth of each cell independently 

 - an implementation of the Proportional Fair scheduler based on the

   FF LTE MAC Scheduler API is now included 

 - support for output of RLC and MAC layer Key Performance Indicators

   (KPIs) via dedicated trace sinks connected to newly defined trace

   sources 

 - the setting of the most relevant parameters (e.g. tx power, noise,

   carrier frequency, bandwidth, type of scheduler, etc.) is now done

   via the ns-3 attribute system   

 - several test suites have been added, including both unit tests that

   check the correct functionality of specific objects, and system

   tests that validate the output produced by the simulator in several

   scenarios of interest.

 - the documentation of the lte module has been entirely rewritten, it

   now features three separate sections: the design documentation, the

   user documentation and the testing documentation. 

First Public release of the LENA project (March 10, 2011)

=========================================================

The LENA code is based on the GSoC 2010 project code by Giuseppe Piro,

which was merged into ns-3-dev on December 2010. With respect to the GSoC

code, the main modifications that have been performed are: 

 - the MAC has been entirely rewritten to support the MAC Scheduler

   API defined by the Femto Forum, which is publicly available at this

   location: http://www.femtoforum.org/femto/technical.php

 - a Round Robin scheduler implementation based on the above API is

   also provided

 - the RLC API has been redefined  RLC in particular, at this stage

   only the API definition is in place, together with a simplified RLC

   implementation (RLC TM/UM/AM not available yet) 

  - the RRC has been entirely rewritten; we plan to reuse part of the

    GSoC 2010 flow classification code (which we plan to reuse) at a

    future stage for the implementation of Traffic Flow Template

    classifiers. 

  - network layer functionality has been temporarily disabled; it will

    be re-enabled when either RLC/UM or RLC/AM is available. 

GSoC 2010 release (merged into ns-3-dev on December 2010)

=========================================================

Here are 

In summary, the most important features provided by the

proposed module are (i) a basic implementation of both the

User Equipment (UE) and the enhanced NodeB (eNB) de-

vices, (ii) RRC entities for both the UE and the eNB, (iii)

a state-of-the-art Adaptive Modulation and Coding (AMC)

scheme for the downlink [9], (iv) the management of the

data radio bearers (with their QoS parameters), the MAC

queues and the RLC instances, (v) Channel Quality Indi-

cator (CQI) management, (vi) support for both uplink and

downlik packet scheduling, (vii) a PHY layer model with

Resource Block level granularity and (viii) a channel model

with the outdoor E-UTRAN propagation loss model.