University of Granada

DDS-enabled Cloud management support for fast task offloading

Cloud computing has become an essential technology not only for web provisioning, but also in mobile scenarios. Mobile devices are usually resource constrained due to processing and power limitations, so typical applications are not easy portable. Battery draining and application performance (resource shortage) have a big impact on the experienced quality, so shifting applications and services to the Cloud may improve mobile user's satisfaction.

Publication Year: 
2012

Unack'ed messages in BYTES

Hello RTI users,

I've been using DDS_ReliableWriterCacheChangedStatus.unacknowledged_sample_count to get the number of unacknowledged messages in my publisher queue, but I realised I need to pass it to number of bytes. Is there any parameter or way to do it directly?

I ask this because other parameters have the option to read them as "number of bytes".

I will be grateful for any help you can provide,
Juan J. Martin.
Organization:

Real scenarios message size

Hello RTI users,

 

I'm measuring performance in different DDS scenarios, and I'd need to know what range of message sizes are being used in real scenarios, so my work focus in that range.

 

I will be grateful for any information you can provide me,
Juan J. Martin.
Organization:

Blocking write in DataWriter

Hello RTI users,

 

I've got some questions about DataWriters:

 

Organization:

A content-aware bridging service for publish/subscribe environments

Abstract: The OMG DDS (Data Distribution Service) standard specifies a middleware for distributing real-time data using a publish-subscribe data-centric approach. Until now, DDS systems have been restricted to a single and isolated DDS domain, normally deployed within a single multicast-enabled LAN. As systems grow larger, the need to interconnect different DDS domains arises. In this paper, we consider the problem of communicating disjoint data-spaces that may use different schemas to refer to similar information.

Publication Year: 
2012
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Conference or Venue:

Bloom Filter Based Discovery Protocol for DDS Middleware

Abstract: The Data Distribution Service (DDS) middleware has recently been standardized by the OMG. Prior to data communication, a discovery protocol had to locate and obtain remote DDS entities and their attributes. Specifically, DDS discovery matches the DataWriters (DWs) and DataReaders (DRs) entities (Endpoints) situated in different network nodes. DDS specification does not specify how this discovery is translated “into the wire”.

Publication Year: 
2011

The Wireless and Multimedia Networking Lab researches both the DDS technology as well as the use of DDS for demanding real-time applications. We have serveral research areas, including:

  • Use of DDS for multimedia applications, specifically audio and video distribution on disadvantaged links.
  • Scalable discovery protocols for DDS.
  • Deployment and configuration of DDS applications.
  • Integration of DDS with other networking technologies.

See some of our contributions here or visit our website.

ETSIITCITIC-UGR

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