I am using mixim and built a network including 10 nodes based on MAC 802.11.
I intend to change the transmission range of two nodes with Tx range = 200, and the other 8 nodes have Tx range = 300. I know to change Tx range of nodes, I should change Tx power in Phy layer and connection manager.
But, If I change the values, the transmission range of all the nodes will change because all the nodes use the same connection manager. Moreover, because all the nodes should have connections with others, I think I cannot use different connection managers.
In brief, I intend to change the Tx range of specific nodes (not all) in the network with same configuration, while all the nodes have connections together.
Thank you for your response.
What you are trying to set in the connection manager is the maximum interference range which has almost nothing to do with the range where radios are actually can successfully receive each other's packet. That seems to be only an optimization parameter. PhyLayer modules are present in each node, so those power parameters can be set independently for each, but you will have a HARD time figuring out, what power you should set, to get a specific distance (like 200m).
I advise you NOT to use MiXiM (and let it rest in peace), as it is a long abandoned project and all the functionality in it was merged long ago into the INET Framework.
In INET framework, you can set up UnitDisc radios, where you actually can set a transmission range in meters.
Check the wireless tutorial: https://inet.omnetpp.org/docs/tutorials/wireless/doc/step3.html
Related
I'm trying to gather metrics to measure routing utilization on a set of different designs. Any pointers would help a lot!
In the Router Utilization Summary, what does "Global Vertical/Horizontal Routing Utilization" measure?
Global Vertical Routing Utilization = 15.3424 %
Global Horizontal Routing Utilization = 16.3981 %
Routable Net Status*
*Does not include unroutable nets such as driverless and loadless.
Run report_route_status for detailed report.
Number of Failed Nets = 0
Number of Unrouted Nets = 0
Number of Partially Routed Nets = 0
Number of Node Overlaps = 0
Is there any way to access the per CLB metrics mentioned here (especially the "Horizontal/Vertical routing congestion per CLB") through tcl? I've searched far and wide to no avail.
Routing report
Since CLBs in an FPGA are connected through configurable switches to redirect traffic, as shown in this source:
Also quoting it:
A vertical (horizontal) channel is defined as a set of tracks between two consecutive columns (rows) of CLBs; wire segments connecting CLB pins are aligned into tracks running in the channel.
So it seems that the Vivado report means how much the switches are used in vertical and horizontal configuration. I don't know how much this information could be useful to the end user, maybe a big disproportion of these percentages might indicate that some particular hard IPs are overutilized and all the connections follow one direction, but other than that I would expect the percentages to be quite similar, and together an indication of how "crowded" your design is.
Metrics
For the second question, I believe you can't access the metrics because the link you have shown is just a heat map over the device, that is drawn by Vivado.
You can however access to the underlying data used to generate the map, for instance by running the time report
report_timing_summary -delay_type min_max -report_unconstrained -check_timing_verbose -max_paths 10 -input_pins -routable_nets -name timing_1
You can access to the Min Slack per placed BEL.
I have setup my environment using omnet++, sumo and veins in ubuntu. I want to reduce packet loss in an emergency situation among vehicles and improve packet delivery time and cost. My project is about choosing the suitable processing position among cluster head (nodes), road side unit (rsu) and cloud. I want to achieve certain tasks that is need to implement my veins project. I have configured 50 nodes and 4 rsu and provide data rate about 6mbps and assign the packet size upto 2MB.
Therefore, how can I change the behavior of vehicles (nodes), road side unit (rsu) and cloud in order to implement the following parameters?
processing rate of clusters (nodes) = 3 Mbps.
processing rate of RSUs = 7 Mbps.
processing rate of cloud = 10 Mbps.
the range of clusters (nodes) = 60 m.
the range of RSU = 120 m.
the range of cloud = 500 m.
If you could help with building these parameters I will appreciate it.
Thank you
If you are talking about transsmision rate, then you can set the bit rate in the ini file (check veins example) but if you meant processing delay then it is usually simulated by scheduling self messages (check tictoc example). In terms of transsmsion range, veins uses Free Space Propagation model and the related parameters are set in the ini file so you can change them to decide the required range. Finally, I recommand to read more about veins and how it deal with the parameters you asked about. There are alot of answered questions on StackOverFlow about your questions.
In a wireless simulation with omnet++ inet 3.6, how can I manage sensor nodes to send the packets to the nearest mobile nodes? There are several sensor and mobile nodes in the field and thus cannot choose a specific destination like *.host[*].udpApp[0].destAddresses="host[0]"
Thanks for your answer.
If you have specific needs in the behavior of the application you are using, you need to implement that application. I assume you want to send UDP traffic (as TCP is connection oriented). Take a look at UdpBasicApp and modify it in a way that instead of reading the destination address once during the initialization, it must calculate the destination IP on each new packet (based on the position of nodes).
I want to compute an overall delivery ratio in function of time using vectors based on Omnet++ signals ? How can i achieve it when there is a multiple source and only one sink.
For example, say that i have 10 mobiles nodes that send data to a fixed AP, the delivery ratio is equal to (received/sent packets), but the AP knows only the amount of received packets.
I declared the following signals and statistics:
For AP:
#signal[receivedBndl](type = "int");
#statistic[receivedBundle](title="ReceivedBundle";source=receivedBndl;record=count,mean,last,vector);
For Nodes:
#signal[sentBndl](type = "int");
#statistic[sentBundle](title="SentBundle";source=sentBndl;record=count,mean,last,vector);
Is it possible to create another #statistics that compute the Delivery Ratio in function of time with this 2 signals ?
Thanks,
This is more like a network wide statistic, than something related to a single node so you have to install your statistic listeners on the top-level network module itself instead of the actual nodes. OMNeT++ signals propagate up on the containment chain so any signal that was sent to a specific node will be delivered also to the containing network module. This makes it possible to install the statistics on the network and get the given signal there (too).
To achieve this I would rewrite the code to actually emit the sent/received cPacket objects (and not the count of them as an integer). You still can count the number of packets using the count() function in the statistics.
For AP:
#signal[receivedBndl](type = cPacket);
For nodes:
#signal[sentBndl](type = cPacket);
As each actual sent/received packet is now emitted to their sending/receiving module (and anything above them), you can install a statistic in the top-level module and combine them into a single statistic:
#statistic[deliveryratio](source=count(receivedBndl)/count(sentBndl); record=last);
This last line will install two signal listeners on the top level module and the statistics will calculate the value each and every time any module generates or receives a packet anywhere in the network.
I develop simulator of mobile nodes, each one with transmission range of 100m for example. The communication between the nodes are wireless and TDMA based.
I have notice that if 2 nodes (not in the same range) broadcast message on the same time, it's cause to a problem.
How can i limit the distance of nessage that is sent from a node ? such that i can broadcast 2 or more messages on the same time, and just the nodes in the range of the sending node will hear the message ?
The code that processes the reception of the packet should calculate the distance from the sender and drop the packet if it's out of range.
A little less accurate solution: before sending the packets the broadcasting node should check the distance to the potential receiving node and not send the packet if it is out of range. This is a bit faster (as it generates less packets) and more clear (you will see the broadcast animation only for the packets that actually delivered)
A much easier solution: Use INET Framework, which already has the necessary implementation. You would only need to implement a MAC module that handles the TDMA protocol.