simulator-wg/sharc

Simulator for use in sharing and compatibility studies of wireless communication systems

sharc's Issues

Hotspot network topology

Apply the correction factor in order to make the total integrated gain for an IMT AAS antenna pattern equals to 0 dBi (or 1 in linear scale)

Check Section 16 of Annex 1 to Document 5-1/173-E for a more detailed explanation. It can be created a new input parameter to control whether or not correction factor is applied in simulation.

STEP 1.c: Link the UE randomly to a BS to which the path coupling loss is within the smallest coupling loss plus the HO margin

Close-in (CI) free space reference distance PL model

STEP 1.b: Calculate path coupling loss from each UE to all base stations.

Initially, there is no need to identify the smallest coupling loss values between UE and BS because wrap-around is not implemented yet

Indoor network topology

Implement indoor topology and include the building entry loss when needed

Improve the calculation of the spot beam coverage area

When the satellite elevation angle is 90 deg, the coverage area of a circular beam is given by the curved surface area of the spherical cap. This is not the case for other elevation angles and this calculation has to be improved.

Implement the load probability (activity factor) for IMT base stations

Implement the flowchart of simulation uplink method

FSS/BSS system modeling

GUI locks when results button is pressed

Module for collecting and handling results.

Generate cumulative distributions for:

• transmit power
• internal and external interference
• SINR
• received power
• path coupling loss

Tkinter is not thread safe

Expected behavior

GUI should run without any problem.

Actual behavior

User interface is based on tkinter, which is not thread safe. Actual simulation flow is started by a separated thread and application crashes when simulation sends update messages to GUI from a thread other than the main one.

Steps to reproduce the problem

Run simulator in Linux environment (Anaconda with Python 3.5). For some reason, simulation runs fine in Windows.

IMT system scheduler

closed issue

Single base station network topology

Create a topology with a single base station

STEP 1.d: Select K UEs randomly from all the UEs linked to one BS as “chosen” UEs

Implement Free Space propagation model

Implement code and unit tests

IMT power control for uplink

Review all unit tests

All unit tests must be reviewed.

• There is a gap to improve the coverage of unit tests;
• Running unit tests must be fast

Error using the math.inf in atmosphere.py

• SHARC version: (development branch) at commit aba88b7
• Python version: Python 3.4.2
• Operating System: Debian 3.16.43

Description

Trying to run through main_cli.py with parameter.ini

What I Did

Paste the command(s) you ran and the output.
If there was a crash, please include the traceback here.

~/SHARC/sharc$ python3 main_cli.py parameters/parameters.ini 
Traceback (most recent call last):
  File "main_cli.py", line 54, in <module>
    main(sys.argv[1:])
  File "main_cli.py", line 49, in main
    view_cli.initialize(param_file)
  File "../sharc/gui/view_cli.py", line 27, in initialize
    param_file = param_file)
  File "../sharc/controller.py", line 49, in action
    self.simulation_thread.run()        
  File "/home/ssk/SHARC/sharc/thread_simulation.py", line 53, in run
    self.model.initialize()
  File "../sharc/model.py", line 48, in initialize
    self.simulation = SimulationDownlink(self.parameters)
  File "../sharc/simulation_downlink.py", line 21, in __init__
    super().__init__(parameters)
  File "../sharc/simulation.py", line 48, in __init__
    self.propagation_system = PropagationFactory.createPropagation(self.param_system.channel_model, self.parameters)
  File "../sharc/propagation/propagation_factory.py", line 41, in createPropagation
    return PropagationP619()
  File "../sharc/propagation/propagation_p619.py", line 32, in __init__
    self.scintillation = Scintillation()
  File "../sharc/propagation/scintillation.py", line 21, in __init__
    self.atmosphere = ReferenceAtmosphere()
  File "../sharc/propagation/atmosphere.py", line 17, in __init__
    self.ref_atmosphere_altitude_km = [-math.inf, 11, 20, 32, 47, 51, 71]
AttributeError: 'module' object has no attribute 'inf'

I was able to run by this fix though

@@ -14,7 +14,7 @@ class ReferenceAtmosphere:
     """
     def __init__(self):
         # Table C.1 of ITU-R P619 - Constants for the reference dry atmosphere
-        self.ref_atmosphere_altitude_km = [-math.inf, 11, 20, 32, 47, 51, 71]
+        self.ref_atmosphere_altitude_km = [-float('inf'), 11, 20, 32, 47, 51, 71]

Implement antenna beamforming

Feature should be implemented according to the document that defines the simulation guidelines and IMT characteristics.

ITU-R S.1855 radiation pattern for earth station antennas

Implement the radiation pattern for FSS earth stations according to ITU recommendation

STEP 1.f: Calculate transmit power from BS to the “chosen” UE

Spectrum emission masks

IMT DL intra system interference calculation MUST take BS feeder loss into account

The bug appears in development branch, line 114 of SimulationDownlink.py. UL calculation is OK.

Implement a network topology to support IMT x HAPS sharing studies

Close-in free space reference distance model with frequency-dependent path loss exponent (CIF)

Parameters clean up

Remove unused input parameters. Check if all parameter names are meaningful; consider renaming the ones which are not meaningful. Clean up should consider the following points:

• remove tx and rx IMT antenna parameters (only one parameters should be kept);
• create the [OUTDOOR] section;
• create the [P619] section;
• create the [P452] section.

#Feature dumping co-ordinates of BS,hotspots & other sytems

SHARC version: (development branch) at commit aba88b7
Python version: Python 3.4.2
Operating System: Debian 3.16.43

Description

I am trying to run a the sharing studies between IMT & FSS_ES. Using the cli (running on a remote machine). Though the output folder creates the relevant CDF values. Is there a way to have the dump of the BS, Hotspot, ES locations dumped ? So that it can be used on Matlab to plot.

ITU-R F.1891 antenna patern

ITU-R P.452 propagation model

Implement the propagation model described in Recommendation ITU-R P.452

Icon formats not supported

• SHARC version: 0.0.1
• Python version: 3.5
• Operating System: MAC OS / Linux

Description

Tkinter Photoimage class supports only GIF/PGM/PPM image formats. For some some reason, this problem does not apperar on Windows

What I Did

TclError: couldn’t recognize data in image file “img/app_icon.png”

Macro cellular network topology with wrap-around

ITU-R P.619 propagation model

STEP 3.b: Calculate downlink SINR for all "chosen" UEs

Satellite positioning and antenna pointing are not working properly

Users are able to define satellite's absolute position (long) and coordinates of IMT network (lat-long). The problem is that pointing of satellite's antenna is not working as it should be. For example, it is possible to correctly point the antenna towards an IMT network only if the later has latitude equals to 0 deg.

Optimize beamforming implementation to reduce computational complexity

Apply the International System of Units (SI) to the whole simulator

The metre–kilogram–second system of units (MKS) should be used everywhere, including input parameters and variables throughout the simulator's source code.

Implement adjacent channel interference calculation

This model shall include ACLR, ACS and spurious emmisions.

Unit conversion in P452 propagation model

• SHARC version: 0.0.1
• Python version: 3.5
• Operating System: Windows

Description

Frequency and distance units should be stored in MHz and meters, respectively, in order to keep consistency with other parts of simulator. This is not necessarily a bug (since code is working fine), but it has to be fixed in the whole P.452 implementation.

What I Did

This issue was found after code reviewing. Examples: lines 19 and 20 of file propagation_gases_attenuation.py:

d = np.asarray(kwargs["distance"]) #Km
f = np.asarray(kwargs["frequency"]) #GHz