Apostolos Gkamas

@inbook{nokey,

title = {Dynamic Resource Allocation in Future Cellular Networks: DUDe, MIMO, and Beyond},

author = {Konstantinos Tsachrelias and Chrysostomos-Athanasios Katsigiannis and Vasileios Kokkinos and Apostolos Gkamas and Christos Bouras and Philippos Pouyioutas },

editor = {Cellurar Communication System - The Evolution from 1G to 6G, IntechOpen, pp. 1-19},

url = {https://telematics.upatras.gr/intechopen-revision-final/},

year  = {2026},

date = {2026-01-19},

note = {to appear},

keywords = {},

pubstate = {published},

tppubtype = {inbook}

}

@inbook{4569,

title = {An Introduction of Upcoming Radio Resource Management Techniques for 5G Networks},

author = {Christos Bouras and Vasileios Kokkinos and Apostolos Gkamas and Evangelos Michos and Ioannis Sina and Ioannis Prokopiou and Foivos Allayiotis},

url = {https://telematics.upatras.gr/978-1-68507-427-2-161-201/},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

booktitle = {Advances in Engineering Research, Nova Science Publishers},

volume = {46},

pages = {147-188},

chapter = {3},

abstract = {5G networks are the next generation of mobile internet connectivity, that are able to offer vastly increased speeds, more reliable connections, minimal latency and more supported devices. 5G networks are expected to supercharge Internet of Things (IoT) technology, so as to provide the infrastructure needed in order to support and transfer large data amounts that will enable a smarter and more connected world. To this direction, 5G incorporates many technologies and mechanisms that aid towards the overall goal, such as Multiple-Input and Multiple-Output (MIMO), Downlink (DL) and Uplink (UL) Decoupling (DUDe) and Machine Learning (ML). These technologies can significantly help towards more efficient resource allocation inside the next generation networks, offering increased spectral efficiency and data rates, better signal coverage, reduced latencies and many more. In this chapter, we will provide insights over the aforementioned technologies through firstly a literature review and later on by analyzing their architecture and their models. We will explain how these technologies can be taken advantage of in order to support the 5G networks and why they are core components of future networks, as it is expected that also 5G and Beyond networks will capitalize on them.},

keywords = {DUDe},

pubstate = {published},

tppubtype = {inbook}

}

@inbook{4498,

title = {A Novel Approach to Energy Management in Large Passenger and Cruise Ships: Integrating Simulation and Machine Learning Models},

author = {Christos Bouras and Eirini Barri and Apostolos Gkamas and Nikos Karacapilidis and Dimitris Karadimas and Georgios Kournetas and Yiannis Panaretou},

url = {https://telematics.upatras.gr/simultech2020_id32_cameraready_aiscs_submitted-updated-final/},

year  = {2021},

date = {2021-01-01},

urldate = {2021-01-01},

booktitle = {Springer Book of SIMULTECH 2020},

abstract = {It has been broadly admitted that the prediction of energy consumption in large passenger and cruise ships is a complex and challenging issue. Aiming to address it, this chapter reports on the development of a novel approach that builds on a sophisticated agent-based simulation model, which takes into account diverse parameters such as the size, type and behavior of the different categories of passengers onboard, the energy consuming facilities and devices of a ship, spatial data concerning the layout of a ship’s decks, and alternative ship operation modes. According to the proposed approach, outputs obtained from multiple simulation runs are then exploited by prominent Machine Learning algorithms to extract meaningful patterns between the composition of passengers and the corresponding energy demands in a ship. In this way, our approach is able to predict alternative energy consumption scenarios and trigger meaningful insights concerning the overall energy management in a ship. Overall, the proposed approach may handle the underlying uncertainty by blending the process centric character of a simulation model and the data-centric character of Machine Learning algorithms. The chapter also describes the overall architecture of the proposed solution, which is based on the microservices approach.},

keywords = {},

pubstate = {published},

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}

@inbook{4497,

title = {An agent-based simulation model for energy saving in large passenger and cruise ships},

author = {Christos Bouras and Eirini Barri and Apostolos Gkamas and Nikos Karacapilidis and Dimitris Karadimas and Giorgos Kournetas and Yiannis Panaretou},

url = {https://telematics.upatras.gr/wp-content/uploads/2024/01/Chapter5.pdf},

year  = {2021},

date = {2021-01-01},

urldate = {2021-01-01},

booktitle = {CRC Press},

abstract = {Undoubtedly, energy saving is of paramount importance in the shipping industry, as far as both the protection of environment and the reduction of the associated operating costs are concerned. In this direction, the 

International Maritime Organization aims to reduce ship emissions by at least 50% by 2050, while ships to be built by 2025 are expected to be a massive 30% more energy efficient than those built some years ago [IMO, 

2018].},

keywords = {},

pubstate = {published},

tppubtype = {inbook}

}

@inbook{3130,

title = {Adaptive multimedia transmission over the Internet},

author = {Christos Bouras and Apostolos Gkamas},

url = {https://telematics.upatras.gr/wp-content/uploads/2024/01/4416adaptive.pdf},

year  = {2010},

date = {2010-01-01},

urldate = {2010-01-01},

booktitle = {Chapter 20, Selected Topics in Communication Networks and Distributed Systems},

pages = {589 - 606},

publisher = {World Scientific},

organization = {World Scientific},

abstract = {The Internet is a heterogeneous network environment and the network resources that are available to multimedia applications can be modified very quickly. Multimedia applications must have the capability to adapt their operation to network changes. In order to add adaptation characteristics to multimedia applications, we can use techniques both at the network and application layers. Adaptive multimedia transmission techniques have the capability to transmit multimedia data over heterogeneous networks and adapt media transmission to network changes. In order to provide adaptive multimedia transmission, mechanisms to monitor the network conditions and mechanisms to adapt the transmission of the data to the network changes must be implemented. This chapter concentrates on the architecture and design issues of adaptive multimedia techniques that provide the capability to transmit multimedia data over heterogeneous networks and adapt the transmission of the multimedia data to the network changes.},

keywords = {},

pubstate = {published},

tppubtype = {inbook}

}

@inbook{3140,

title = {Best Practices and Strategies for Broadband Deployment: Lessons learned around the world},

author = {Christos Bouras and Apostolos Gkamas and Thrasivoulos Tsiatsos},

url = {https://telematics.upatras.gr/wp-content/uploads/2024/01/29845078Chapter-8.pdf},

year  = {2010},

date = {2010-01-01},

urldate = {2010-01-01},

booktitle = {C. Bouras, A. Gkamas, T. Tsiatsos, Adoption, Usage, andGlobal Impact of Broadband Technologies: Diffusion, Practice and Policy},

pages = {128 - 142},

publisher = {IGI Global},

chapter = {8},

organization = {IGI Global},

abstract = {<p>Broadband deployment is a necessity nowadays. It could help each country, municipality and region to grow and offer better quality of life to the citizens. Today, the emphasis on the development of broadband networks is on fixed Fibre To The Home solutions The lessons learned from countries that are leaders in broadband penetration and Fibre To The Home deployment could be proven very useful for under-served communities, regions and countries where the broadband penetration is low. Therefore, this chapter summarises the lessons learned from implementing (a) country-wide strategies formulated at the national level, and (b) local strategies formulated by the municipalities. Concerning the role of national and local governments, it should be noted that nowadays it is very urgent the involvement of government in the development of broadband infrastructure. Proposed noteworthy remarkable cases are Japan, South Korea and Singapore.</p>},

keywords = {},

pubstate = {published},

tppubtype = {inbook}

}

@inbook{3133,

title = {Cross Layer Design for Multimedia Transmission over Wireless Networks},

author = {Christos Bouras and Apostolos Gkamas and G Kioumourtzis},

url = {https://telematics.upatras.gr/wp-content/uploads/2024/01/21084.pdf},

year  = {2010},

date = {2010-01-01},

urldate = {2010-01-01},

booktitle = {Next Generation Mobile Networks and Ubiquitous Computing},

pages = {35 - 42},

publisher = {Information Science Reference},

chapter = {4},

organization = {Information Science Reference},

abstract = {<p>Over the last years a number of new protocols have been developed for multimedia applications in the whole OSI layer?s scale. In addition wireless communications and networking fast occupy centre stage in research and development activity in the area of communication networks. In order to support better wireless user the cross layer design paradigm has been proposed. This chapter presents the challenges in design and implementation of cross layer adaptation schemes for multimedia transmission over wireless networks. In addition this chapter presents the most important parameters and constrains that should be taken into consideration when attempting cross layer adaptation in wireless networks that involves different protocols in the overall protocol stack.</p>},

keywords = {},

pubstate = {published},

tppubtype = {inbook}

}

@inbook{3135,

title = {Providing Quality of Service across multiple providers: The case of European research and academic space},

author = {Christos Bouras and Apostolos Gkamas and Kostas Stamos},

url = {https://telematics.upatras.gr/wp-content/uploads/2024/01/5582978-1-61520-791-6_ch015.pdf},

year  = {2010},

date = {2010-01-01},

urldate = {2010-01-01},

booktitle = {Intelligent Quality of Service Technologies and Network Management: Models for Enhancing Communication},

pages = {280 - 296},

publisher = {IGI Global},

organization = {IGI Global},

abstract = {<p>In this chapter, the authors present some of the latest developments related to the provisioning of Quality of Service (QoS) in today?s networks and the associated network management structures that are or will be deployed to support them. They first give a brief overview of the most important Quality of Service proposals in the areas of Layer 2 (L2) and Layer 3 (L3) QoS provisioning in backbone networks, and they discuss the network management structures and brokers that have been proposed in order to implement these services. As a case study, they describe the pan-european research and academic network, which is supported centrally by GEANT and which encompasses multiple independent NRENs (National Research and Education Networks). In the last few years, GEANT has developed and deployed a number of production and pilot services meant for the delivery of quality network services to the end users across Europe.</p>},

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pubstate = {published},

tppubtype = {inbook}

}