Aqua-Sim-NG multichannel MAC implementation - Revision history

Dmitrii at 11:12, 8 August 2018

2018-08-08T11:12:43Z

Dmitrii at 11:11, 8 August 2018

2018-08-08T11:11:21Z

Dmitrii at 11:10, 8 August 2018

2018-08-08T11:10:48Z

Dmitrii at 11:09, 8 August 2018

2018-08-08T11:09:39Z

Dmitrii: Created page with "== Multichannel MAC implementation == * new `aqua-sim-mac-multichannel` module: Modified `TxProcess` and `RecvProcess` methods of the `..."`


2018-08-08T10:52:12Z
Created page with "== Multichannel MAC implementation ==  * new <code>aqua-sim-mac-multichannel</code> module:  Modified <code>TxProcess</code> and <code>RecvProcess</code> methods of the <code>..."
New page
== Multichannel MAC implementation ==



* new <code>aqua-sim-mac-multichannel</code> module:



Modified <code>TxProcess</code> and <code>RecvProcess</code> methods of the <code>AquaSimMac</code> base class. Added channel division on N number of subchannels, depending on given bandwidth. By default, the following bandwidth is used and the following subchannels are created:



* bandwidth: 10 - 40 kHz

* step frequency: 3 kHz

* N of subchannels: 10



The following <code>channel_id:frequency</code> map is generated:



&lt;channel_1 : 10 kHz&gt;, &lt;channel_2 : 13 kHz&gt;, …, &lt;channel_10 : 37 kHz&gt;



* modified <code>aqua-sim-phy-cmn</code> module:



Modified <code>recv()</code> method of <code>AquaSimPhyCmn</code> class, which is used for both transmission and reception of the scheduled packet. The modified <code>recv()</code> method has a new argument - frequency, and is executed by upper multichannel-mac module, depending on the selected channel_id.



* modified <code>aqua-sim-channel</code> module:



Modified <code>SendUp()</code> method of <code>AquaSimChannel</code> class. Now this method gets a frequency value of the incoming packet, using <code>AquaSimPacketStamp</code> class and inserts it into the <code>::Recv()</code> method of the <code>AquaSimPhyCmn</code> upon execution in the Scheduler.



== Initial tests ==



For the initial tests the following simulation scenario was used:



“node_1 (sender)” &lt;— 10m distance —&gt; “node_2 (sink)”



The following stack was used on both nodes: - OnOffApplication — OffTime: 0, OnTime: 1 - Routing — Dummy (for MAC layer testing) - MultichannelMac — default bandwidth (10 - 40 kHz), 10 subchannels, 3kHz frequency step - PhyCmn — modified PhyCmn module



Some other parameters: - Simulation time: 10 seconds - Transmission range: 100 meters (for Phy module) - Distance: 10 meters (Mobility model)



In all tests a throughput was measured by defining an application data rate, higher than possible capacity of the given channel:



'''80 kbps''' <code>dataRate</code> parameter of <code>OnOffApplication</code>. Thus, the throughput was measured by counting a total amount of received packets:



throughput = total_received_packets * packet_size * 8 / 10, [bps]



where: 10 - simulation time, seconds.



=== 1-st test ===



A single channel was used during entire simulation. - channel_id: 1, frequency: 10 kHz.



The throughput was measured, depending on varying packet length. The result is plotted on Fig.1.



[[File:https://github.com/dugdmitry/aqua-sim-ng/blob/master/multichannel_tests/images/throughput_1_channel.svg|throughput_1_channel]] Fig.1



Corresponding sent/received packet count is illustrated on Fig.2.



[[File:https://github.com/dugdmitry/aqua-sim-ng/blob/master/multichannel_tests/images/packet_count_1_channel.svg|packet_count_1_channel]] Fig.2

← Older revision		Revision as of 11:12, 8 August 2018
Line 79:		Line 79:
	Code of simulation script can be found here:		Code of simulation script can be found here:

−	[https://github.com/dugdmitry/aqua-sim-ng/blob/master/examples/multichannel_mac_example.cc]	+	[https://github.com/dugdmitry/aqua-sim-ng/blob/master/examples/multichannel_mac_example.cc multichannel_mac_example.cc]

← Older revision		Revision as of 11:11, 8 August 2018
Line 79:		Line 79:
	Code of simulation script can be found here:		Code of simulation script can be found here:

−	[[https://github.com/dugdmitry/aqua-sim-ng/blob/master/examples/multichannel_mac_example.cc]]	+	[https://github.com/dugdmitry/aqua-sim-ng/blob/master/examples/multichannel_mac_example.cc]

@@ Line 45: / Line 45: @@
 The throughput was measured, depending on varying packet length. The result is plotted on Fig.1.
-[[File:throughput_1_channel.png]]
+[[File:throughput_1_channel.png]] Fig.1
 Corresponding sent/received packet count is illustrated on Fig.2.
-[[File:packet_count_1_channel,png]] Fig.2
+[[File:packet_count_1_channel.png]] Fig.2
@@ Line 71: / Line 71: @@
 The throughput is plotted on Fig.3.
-[[File:throughput_n_channels,png]] Fig.3
+[[File:throughput_n_channels.png]] Fig.3
 Corresponding sent/received packet count is illustrated on Fig.4.

Aqua-Sim-NG multichannel MAC implementation - Revision history

Dmitrii at 11:12, 8 August 2018

Dmitrii at 11:11, 8 August 2018

Dmitrii at 11:10, 8 August 2018

Dmitrii at 11:09, 8 August 2018

Dmitrii: Created page with "== Multichannel MAC implementation == * new aqua-sim-mac-multichannel module: Modified TxProcess and RecvProcess methods of the ..."

Dmitrii: Created page with "== Multichannel MAC implementation == * new `aqua-sim-mac-multichannel` module: Modified `TxProcess` and `RecvProcess` methods of the `..."`