24 - Extension to UE measurements and improved handover algorithm models in LTE

    25   module, as the outcome of GSoC 2013 project. The project also includes several

    26   sub-features, such as:

    27    - implementation of System Information Block Type 1 (SIB1);

    28    - a new option for automatic UE attachment using Idle mode cell selection

    29      procedure;

    30    - improved configurability of UE measurements; and

    31    - two options of handover algorithms for enabling automatic handover trigger

    32      in LTE simulation: A2-A4-RSRQ and strongest cell (A3-RSRP).

    33 

    34 - A new FixedRoomPositionAllocator has been adeded to the buildings

    35   module. It allows to generate a random position uniformly

    36   distributed in the volume of a chosen room inside a chosen building.  

    37 

    38 - A new attribute ns3::LteRlcAm::TxOpportunityForRetxAlwaysBigEnough

    39   allows to overcome the lack for re-segmentation in the RLC AM

    40   implementation by assuming that the size of a TxOpportunity is

    41   always big enough for the RLC AM PDU to be retransmitted.

    42 

    43 - After some profiling, the code of LteMiErrorModel has been optimized

    44   for speed, resulting in a significantly lower execution time of the

    45   LTE model when used with the error model enabled.

    46 

    47 - A new WiFi extension for vehicular simulation support is available in 

    48   the src/wave directory.  The current code represents an interim capability 

    49   to realize an IEEE 802.11p-compliant device, but without the WAVE 

    50   extensions (which are planned for a later patch).  The WaveNetDevice 

    51   modelled herein enforces that a WAVE-compliant physical layer (at 5.9 GHz)

    52   is selected, and does not require any association between devices (similar 

    53   to an adhoc WiFi MAC), but is otherwise similar (at this time) to a 

    54   WifiNetDevice.  WAVE capabililties of switching between control and 

    55   service channels, or using multiple radios, are not yet modelled.

    56 

    57 - A new IPv6 over Low power Wireless Personal Area Networks (6LoWPAN) model

    58   is available.  Using ns-3's naming convention, the acronym is expanded

    59   to SixLowPanNetDevice.   The SixLowPanNetDevice is able to act as a 

    60   shim between IPv6 and a NetDevice, compressing IPv6 headers according 

    61   to RFCs 4944 and 6262.  The SixLowPanNetDevice is meant to be used over 

    62   IEEE 802.15.4 NetDevices, but it can be used on other NetDevices as 

    63   well (see the manual for full details).  This model precedes the

    64   general availability of an 802.15.4 model, so must be run in conjunction

    65   with a wired NetDevice model for now, or with experimental versions of

    66   802.15.4 models.

    67