When running ros2 on QNX with rmw_connext_cpp I get the following error message:
command:
ros2 run demo_nodes_cpp talker
Error message:
DDS
Currently, we have been working with SDN OpenDaylight instances that control different autonomous systems. We have managed to synchronize them by replicating each network's data to the other controller. In this way, both instances are able to provide backup functionalities between them which is an important characteristic in order to improve the network response time in cases of emergency in 5G Networks.
We deploy two types of controllers which use the DDS to exchange network information as shown in the figure.
The Global Controllers (GCs) communicate with each other to keep a consistent network state and establish inter-domain flow routes. In the same way, the Area Controllers (ACs) update their GCs when a change in their topology occurs. Similarly, the GCs inform their ACs when there is a change in the global topology that can affect the communication among the nodes under the control of different ACs. Furthermore, the use of the DDS allows a stronger performance during the recovery stages because the GCs share their network information with each other. Thus, if any problem arises with a GC operation, its functions are assumed by another GC.
The testbed architecture is composed of two GCs, each of which manages two ACs. The GCs are physically distributed in Granada (University of Granada, UGR) and Barcelona (Universitat Politècnica de Catalunya, UPC). Similarly, their ACs are placed in these locations, and they can only communicate with their GCs. Thus, we have two SDN domains. The blue dashed line represents the DDS connections over RedIRIS as shown in the following picture.
The GCs were configured to support communication over Wide Area Network (WAN). In this way, the GCs can exchange network information and discover other GCs through DDS. The ACs were also configured to support communication over WAN in case their GCs are geographically distant in another SDN domain. However, the first principle was to use private LAN to communicate with controllers in the same SDN domain.
Thu, 08/19/2021 - 09:45
#1
error message running connext rti 6.0.1 on QNX
Thu, 11/05/2020 - 09:18
#1
Is There a Benchmarking Tool That Tests the Performance of Multiple DDS Products As Well As RTI
Hi there,
I am a current PhD student working on "Experimental and Model-based Evaluation of DDS Performance and Security". As part of my research I am looking for a benchmarking tool that would allow me to performance test multiple DDS products such as Vortex OpenSplice and OpenDDS. I have experience performance testing using RTI's PerfTest application and would like to compare the results with other DDS products.
Sun, 09/27/2020 - 21:45
#1
Thu, 08/20/2020 - 22:14
#1
Does RTI Connext DDS support Hololens 1or2 development?
Hello
I want to know if RTI DDS support any form of development for Microsoft AR goggles Hololens 1 or Hololens 2?
Is it possible that I can build the application with Unity in C#, and is able to deploy into Hololens?
My goal is to use AR goggle as a platform to run subscriber to catch the information from computer, through the wireless connection ability of Hololens. But the internet gives no such result for this question.
If there are indeed some methods to achievement this, do I need a license? Do I need to use another dedicated library?
Mon, 01/20/2020 - 05:47
#1
Crashing out the box with matrix struct in IDL
Hello,
I am attempting to send images across DDS, to do so I'd like to make a struct comprising of just a matrix. In the IDL I'm doing
struct imgType{
unsigned long imgMat[1224][1025];
};
At the University of Vigo's telecommunications engineering school, students learn the mathematical and physical principles that are necessary to understand telecommunication systems. We also teach them different programming languages, design tools, or in general, how to use computer based and electronic tools to build these communication systems.
In the final year of undergraduate studies, in the subject "Embedded Systems Design", we ask students to design and build a small autonomous vehicle (a quadcopter or a robocar). To do this, they must first create an "autopilot" to manage the information from the sensors, distribute it to the various information processing and decision making systems and finally apply the control commands.
The students build a distributed system in which they use RTI Connext DDS to exchange information between the different blocks of software.
