Master Thesis at Ericsson Research - 5G Networks in Unlicensed Bands

Job description

Req ID: 154511

Doing your Master thesis with us at Ericsson means that you will work on a challenging thesis project and develop your skills in the areas you’re most passionate about. You will be exposed to a truly global organization that develops cutting edge technology which leads the way in the Networked Society. Our non-hierarchal culture will let you engage with some of the brightest minds in the industry – At Ericsson we believe in a supportive, open environment where you can ask anyone, anything, anywhere around the world.

For you - this is a great opportunity to learn from the foremost experts in the field as well as develop a deeper knowledge about the ICT industry and what areas might suit you as you start the exiting journey of your future career.

Background

Ericsson and other mobile network vendors are currently standardizing 5G in the global standardization body, 3GPP. 5G should provide tenfold performance increase in terms of user bit rates, end-to-end delays, system capacity, and energy performance.

Due to the enormous success of smart phones, mobile broadband, and video streaming, the mobile operators are interested in finding more frequency spectrum for cellular communication. Today, the mobile communication takes place within licensed frequency bands only.

However, 3GPP is now specifying methods for 4G to also utilize unlicensed frequency bands, i.e. bands where cellular transmission can take place without a purchased license, as long as certain rules are adhered to. Typically, such rules restrict the transmit power and the maximum length of each transmission. The transmitter also needs to check that the radio channel is not used by someone else, called listen-before-talk (LBT). Ericsson would therefore like to explore the possibility of using unlicensed spectrum for 5G as well.

Thesis Description

The purpose of this thesis is to propose and evaluate algorithms and signaling for 5G in unlicensed spectrum.

It is important that 5G terminals and network can share unlicensed spectrum in a fair and friendly manner with other systems, such as Wi-Fi. In particular, for 5G systems the usage of beam forming will be a central technology component to increase data rates and coverage, where each base station will communicate with users through a set of defined beams pointing in different directions. This will make the interference from other users less common. On the other hand, when they interfere within the narrow beam the interference becomes worse. Link-level performance may be significantly impacted by having interference from a different radio access technology, such as Wi-Fi, causing interference to 5G reception, compared to the performance impact of interference from other 5G users.

Qualifications

This project is aimed at Master of Science students in mathematics/statistics, computer science or electrical engineering. Matlab, C and JAVA are our primary tools for simulation so practical background with these is preferred. Successful candidate has a solid knowledge in radio communication and has average grade above B/4.0.

The selection and interview process is ongoing, and we will close down the ad as soon as we have found the best candidate. Threfore, send in your application in English as soon as possible, and please attach your grades from the University.

Last day to apply: November 30th.

Ericsson Overview
Ericsson is a world-leading provider of telecommunications equipment & services to mobile & fixed network operators. Over 1,000 networks in more than 180 countries use Ericsson equipment, & more than 40 percent of the world's mobile traffic passes through Ericsson networks. Using innovation to empower people, business & society, we are working towards the Networked Society, in which everything that can benefit from a connection will have one. At Ericsson, we apply our innovation to market-based solutions that empower people & society to help shape a more sustainable world. We are truly a global company, working across borders in 175 countries, offering a diverse, performance-driven culture & an innovative & engaging environment where employees enhance their potential everyday. Our employees live our vision & core values. They share a passion to win & a high responsiveness to customer needs that in turn makes us a desirable partner to our clients. To ensure professional growth, Ericsson offers a stimulating work experience, continuous learning & growth opportunities that allow you to acquire the knowledge & skills necessary to reach your career goals.

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Primary country and city: Sweden (SE) || Östergötland || Linköping || Stud&YP