Dear Bob,
In our implementation, DDS acts as a means of transporting the ROS
serialized messages. DDS is plugged into the ROS kernel as a protocol being
equivalent to TCPROS and UDPROS . We name it DDSROS, which can provide
multicast, QoS-assurance and other extra capabilities. That's why our
modification to the kernel can be transparent to existing ROS 1.x
applications.
We are still improving our implementation. Any feedback or suggestion would
be greatly appreciated.
Cheers,
Bo Ding
----
Dr. Bo Ding
micROS team, NUDT, China
bding@msn.com
-----Original Message-----
From: ros-users [
mailto:ros-users-bounces@lists.ros.org] On Behalf Of
rdean@gdrs.com
Sent: Thursday, September 25, 2014 2:56 AM
To:
ros-users@lists.ros.org
Subject: Re: [ros-users] New version of micROS RT (an implementation of ROS
1.x on DDS) and its source code available
Am i correct that your code is using ros serialization on top of a single
dds message?
Thank you,
Bob Dean
RCTA Program, Intelligence Task Coordinator
(
http://www.arl.army.mil/www/default.cfm?page=392)
Open Architecture Technical Lead
General Dynamics Land Systems, Robotics
(410) 876-9200 x1768
(240) 418-3634 (cell)
________________________________________
From: ros-users [
ros-users-bounces@lists.ros.org] on behalf of dingbo
[
bding@msn.com]
Sent: Wednesday, September 24, 2014 1:02 PM
To:
ros-users@lists.ros.org
Subject: [ros-users] New version of micROS RT (an implementation of ROS 1.x
on DDS) and its source code available
Hi everyone!
We're pleased to announce that a new version of micROS RT, an implementation
of ROS 1.x on DDS, is available to download. Its source code is also
available now.
micROS RT (micROS Real-Time) is a modified ROS 1.x C++ kernel which adopts
OMG's DDS (Data Distribution Systems for Realtime Systems) as its underlying
message transfer protocol. It aims at providing scalable, robust and
QoS-assuring message delivery capability while keeping compatibility with
ROS 1.x programming paradigms.
The features of micROS RT include:
(1) Built-in multicast support. Significant performance advantage can be
obtained when there are n subscribers in a ROS topic (n>=2).
(2) Robustness in some adverse network environment. As a mature and
industry-level product, DDS is expected to be more robust in some adverse
network environment.
(3) QoS assurance in the message delivery process. For example, you can
set the transport priority and latency budget of messages on a ROS topic. It
is useful in some real-time settings involving multi nodes/robots.
(4) Existing ROS programs can easily benefit. No modification is needed
and the only thing you should do is to replace a library file in the ROS
installation path.
(5) Interoperable with the official ROS kernel. micROS RT can smartly
choose the underlying message delivery protocol in virtue of the protocol
negotiation mechanism.
In contrast with the early prototype we released three weeks
ago(
http://lists.ros.org/pipermail/ros-users/2014-September/068884.html),
this version provide complete message QoS setting APIs. And some preliminary
tests have been performed.
The binary package, source code, the user's guide and more information can
be found at
http://cyberdb.github.io/micROS-RT/. We would be grateful if you
can try it out and any feedback would be greatly appreciated.
Regards,
Bo Ding
----
Dr. Bo Ding
micROS team, NUDT, China
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