Frequently Asked Questions
Q: How do I get involved?
A: Cool! You have some choices here:
- If you already developed new functionalities for SimuLTE (or you are planning to do so) and you would like to integrate them in the repository, please contact us
- If you have any SimuLTE-related research project or research article, and you want it to be published here, please contact us
- If you just want to start contributing to the SimuLTE project, we suggest you to start by taking a look at the code on the GitHub repository, and possibly sharing your ideas with the community via the OMNeT++ Google Group.
Q: How can I set the number of available Resource Blocks in Downlink/Uplink?
A: It can be set via the numRbDl/numRbUl parameters of the deployer. For example you can both values in .ini file as follows
**.deployer.numRbDl = 6 **.deployer.numRbUl = 6
Q: How can I select the serving eNB for a UE?
A: It can be selected using the macCellId and masterId parameters of the UE node. For example lets suppose we have 2 UEs (ue1 and ue2) and two eNB (enb1 and enb2). We can connect ue1 with enb1 and ue2 with enb2 usign the following code in an .ini file:
**.ue1.macCellId = 1 **.ue1.masterId = 1 **.ue2.macCellId = 2 **.ue2.masterId = 2NOTE that ids are assigned to the eNBs progressively, according to their creation order in the network file.
For more info on this topic, you may want to take a look at the tutorial "Simulating more than one cell"
Q: I need to measure channel utilization (or something alike) and packet loss for the LTE network. Are there any parameters in SimuLTE which provide this information?
A: There are two main metrics you may be interested in:
Channel utilization: look at
cellBlocksUtilizationDl for a percentage of used RBs over the total in downlink. As an alternative
avgServedBlocksDl gives you the average per-TTI number of used RBs. (same think applies in uplink, adding the suffix UL instead of DL)
Packet Loss: as far as it is concerned you are probably looking for HARQ errors (i.e. error due to decoding). Those statistics are stored into
harqErrorRateDl, which gives you a percentage of errors due to HARQ, over the total of transport blocks received. If you need more detailed information, look at
harqErrorRate_2nd_Dl, etc. which gives you the same information as above, but related to 1st HARQ transmissions, 2nd transmissions and so on.