M.Sc. Topic: Wireless Content Dissemination

Wireless local area networking, IEEE 802.11 in particular, is hugely popular for connecting mobile devices to the Internet. However, mobile devices are increasing not only consumers of services produced in the cloud, but are also producers of content themselves (Instagram photos, Facebook posts, even Periscope live video). Today the content produced by these devices is almost always uploaded to Internet connected servers for redistribution, even if other nodes interested in the content are within direct wireless communication range of the producer.

This thesis will explore the dissemination of content directly between devices. Technologies like Bluetooth, Wi-Fi Direct, and even infrastructure mode Wi-Fi allow devices to communicate directly without an indirection to a server, but they are designed to create one-to-one links between the devices. This in turn requires expensive link setup procedures and scales poorly to high densities of co-located devices.

The goal of the thesis is to develop a wireless protocol on the ISM-band for one-to-many dissemination of content between nearby nodes. The protocol should have no explicit one-to-one link creation, and instead operate in a broadcast manner, allowing any nearby nodes to simultaneously receive the disseminated content.

The implementation will be done with USRP B200mini[0] radios and GNU Radio[1] software.

Note: This is a topic for a candidate that already has previous experience in working with some software defined radio hardware and software.

Requirements

  • Strong experience in working with software defined radios.
  • Solid understanding of layer 1 and 2 (physical and link) communication technologies.

Contact

 Teemu Kärkkäinen (M.Sc.), kaerkkae at in tum de

[0] https://www.ettus.com/product/details/USRP-B200mini

[1] https://gnuradio.org/