Author Archives: Konstantinos Stavropoulos

Konstantinos Stavropoulos

Konstantinos Stavropoulos
Dr. Konstantinos Stavropoulos is responsible for product marketing in Amdocs Network Solutions, leading the definition and marketing of productized RAN and cross-domain network offerings. Konstantinos has been focusing on mobile networks for more than 20 years through academic and professional roles. His experience covers diverse areas, from antenna array systems research and mobile network planning/optimization consultancy to the development, management and marketing of innovative software solutions.

The specter of spectrum waste or a spectrum of possibilities?

Many mobile network deployment/optimization projects reveal an interesting truth about (radio frequency) spectrum, the vital and scarce resource for wireless communication. Indeed, it is typical for at least some radio frequency bands to stay under-utilized or be deployed sub-optimally due to the limited consideration of their actual impact on network experience. Such “waste” can become a major business issue for mobile network operators (MNOs), who have invested in expensive licensed spectrum. The situation is similar to what I encountered as a mobile network planning/optimization expert many years ago. Even mature networks were subject to what seemed to be the rule […]  More >>

NxM: How to better understand and manage network experience

Network quality remains a key competitive asset for mobile network operators (MNOs), and is one of the top 3 reasons for service uptake and churn. Still, MNOs have typically followed a deployment and optimization approach that disregards the actual judge of network quality: their customers (subscribers, end users). As the ancient Greek philosopher Protagoras said: “Man is the measure of all things”. The restricted focus on network-centric metrics fails to consider how customers experience the network or their distinct usage/expectations profile. In these terms, MNOs have been unable to target investments and maximize ROI based on the network experience and […]  More >>

Elementary, my dear Watson

analyticsEarly VoLTE rollouts presented a number of challenges for service providers, including VoLTE call drops due to timeout. This particular issue appeared to be IMS related, but the Core/IMS team could not identify its root cause. IMS had just been deployed, so the inability to pinpoint exactly where the issue lay was attributed to lack of knowledge. The mystery was solved after considering data from the radio access network (RAN). It then became evident that the VoLTE call timeout was a RAN issue, caused by noncontiguous radio coverage when users moved between cells. To resolve the matter, the RAN and […]  More >>

Start with the end in mind

End in mindThe need to better manage how end users experience network performance It is rush hour on a rainy Wednesday morning. The metro station is heaving with commuters. The departure board shows the next train leaving at 08.09, but it is already 08.16. No, time travel has not been invented yet. The train is late, and the board has not been updated with the expected time of train departure. The reason for the delay is unknown. It could be a signaling failure, a train fault, leaves on the line, or even track congestion.Whichever the reason, the commuters’ experience of the metro […]  More >>

Confused by 5G news headlines? Why you are not alone

Do you like abstract paintings? Such paintings are inherently open to interpretation. Different people perceive different things, and most uninitiated observers may just see a ‘messy’ picture. But there is logic and design behind – at least some – abstract paintings. This is the case with 5G too. Following vague news and misleading announcements, 5G currently resembles an abstract painting. But the ambiguous or ‘messy’ 5G picture can become clearer if we look into 5 key areas of confusion. The trials blur The tsunami of news about 5G trials has mainly focused on the 5G new radio (NR). With standardization […]  More >>

What 5G is about: an alternative view

wordHow much do you know about 5G? Have you been following the relentless flow of 5G news? If you were to choose 5 words to describe 5G, which ones would you pick? It would be interesting to see what you think 5G is about. But what if we were to ask those who have absolutely no knowledge of 5G and would play such a word game without any preconception, just for fun? As discussed with 2 friends who needed to entertain a group of primary school children at a party, the following game could potentially be exciting: Use a one-page […]  More >>

5G may be closer than you think…

5G is on it's way, but is it almost here?At the end of last month, the inaugural 5G World event took place in London. Over two days packed with presentations, discussions and demos, this conference and exhibition event focused on the next exciting chapter of mobile communication: 5G. The event was also an opportunity for me to participate as a speaker, and share Amdocs’ vision and capabilities in a panel discussion on Test & Measurement for 5G networks. All panel participants agreed on the high-level methodologies required to address the challenges of 5G, which include concepts such as antenna array beam-forming. There was also unanimous agreement on the assertion […]  More >>

The weakest link in customer experience, and the network of the future

network problems  On a cloudy Sunday evening last month, a group of us were watching a film at a friend’s house. Our host had purchased the film from a popular online content provider and was streaming it using his Wi-Fi router, laptop and TV. We were all glued to the screen when disaster struck: after approximately an hour, at a key point in the film, the image pixelated. And less than a minute later, it froze… Reactions in the room were mixed: “there were network issues in the area last week”, “it must be this old laptop”, “a neighbor is using […]  More >>

Voice: A Comeback Story Worth Talking About – PART 2

Click here for Voice: A Comeback Story Worth Talking About – PART 1 The service providers who have commercially launched VoLTE have promoted its benefits through powerful messaging, for example by describing the new service as Advanced Calling, HD (High-Definition) Voice or 4G Super-Voice. Interestingly, an Asian service provider emphasized the crystal clear voice quality that would enable VoLTE users to ‘hear the sound of a grasshopper’ during a call. In the era of data and app texting, such references to an ‘antiquated’ means of communication speak (literally) volumes. Another notable example is a Tier-1 European service provider that belongs […]  More >>

Voice: A Comeback Story Worth Talking About – PART 1

Voice has made a comeback, and it is all because of VoLTE. As a packet-switched technology, VoLTE is more related to OTT VoIP than to the ‘traditional’, circuit-switched 2G/3G voice. In fact, with the introduction of Rich Communications Services (RCS) and capabilities that OTT apps have offered for a while, such as presence, VoLTE is transforming a service that has marginally changed in years.   More >>