@conference {4280, title = {AL-FEC application on NGMN-Edge computing integrated systems}, booktitle = {10th International Conference on Ubiquitous and Future Networks (ICUFN 2018), Prague, Chech Rebuplic}, year = {2018}, month = {July 3 - 6}, pages = {364-369}, abstract = {Edge computing or edge networking is an architecture that uses one or more collaborative multitude of enduser clients or near-user edge devices to carry out a substantial amount of communication, control, management or other operations. Edge Computing for mobile networks is a new technology which is currently under standardization providing an IT service environment and cloud-computing capabilities at the edge of the mobile network in close proximity to the mobile end users. The aim of this technology is to reduce latency, ensure highly efficient network operation and service delivery, providing improved user experience. All of these can be translated into value and can create opportunities for operators, application and content providers enabling them to better utilize the mobile broadband capabilities. Furthermore, edge computing enables a new value chain for end users but also for industries allowing to efficient deliver their applications over the mobile network providing fresh business opportunities and new use cases. FEC is a feedback free error recovery method where the sender introduces redundant data in advance with the source data enabling the recipient to recover from different arbitrary packet losses. Recently, the adoption of FEC error control method has been boosted by the introduction of the powerful RaptorQ Application Layer FEC (AL-FEC) codes. In this work we propose the integration of AL-FEC error protection application at the edge layer. We propose a novel AL-FEC application architecture scheme based on RaptorQ codes and we analyze the performance enhancements such an error control architecture can introduce on NGMN-edge computing integrated systems.}, author = {Christos Bouras and Nikolaos Kanakis} } @article {4326, title = {Evolving AL-FEC application on 5G NGMN-Edge computing systems}, journal = {Technology and Engineering Systems Journal, Special Issue on Multidisciplinary Sciences and Engineering (ASTEJS), Advances in Science}, volume = {3}, year = {2018}, pages = {152-160}, abstract = {Fifth generation of mobile networks (5G) comes to cope with the context of the new mobile telecommunications era. Edge computing is a new collaborative technology under standardization utilizing end-user devices or near-end-user edge devices to operate processing, communication, or control operations. The achievement of efficient error control is a very critical aspect in the successful development of 5G Next Generation Mobile Networks (NGMN). Especially utilizing Forward Error Correction (FEC) codes on the application level is an efficient approach on improving error control on NGMN since it is adopted in several mobile multicast standards. FEC is a feedback free error control technique where redundant data are introduced with the source data to enable the recipient recovering from packet losses with an interesting approach on applying AL-FEC error protection introduces deterministic or randomized online algorithms. Based on this we present a novel online scheme on applying AL-FEC application on the context of the AL-FEC policy online problem. In this work we present an online algorithm based on feedback received from mobile end-users which adapts the introduced protection based on this. Another aspect of this work is the utilization of AL-FEC protection on the edge level based on RaptorQ FEC codes.}, author = {Christos Bouras and Nikolaos Kanakis} } @conference {4224, title = {Evolving AL-FEC application towards 5G NGMN}, booktitle = {9th IFIP International Conference on New Technologies, Mobility and Security, Paris, France}, year = {2018}, month = {February 26-28}, pages = {1-15}, abstract = {The fifth generation of mobile technology (5G) is positioned to address the demands and business contexts of 2020 and beyond. Therefore, in 5G, there is a need to push the envelope of performance to provide, where needed, for example, much greater throughput, much lower latency, ultra-high reliability, much higher connectivity density, and higher mobility range. A crucial point in the effective provisioning of 5G Next Generation Mobile Networks (NGMN) lies in the efficient error control and in more details in the utilization of Forward Error Correction (FEC) codes on the application layer. FEC is a method for error control of data transmission adopted in several mobile multicast standards. FEC is a feedback free error recovery method where the sender introduces redundant data in advance with the source data enabling the recipient to recover from different arbitrary packet losses. Recently, the adoption of FEC error control method has been boosted by the introduction of powerful Application Layer FEC (AL-FEC) codes. Furthermore, several works have emerged aiming to address the efficient application of ALFEC protection introducing deterministic or randomized online algorithms. In this work we propose a novel AL-FEC scheme based on online algorithms forced by the well stated AL-FEC policy online problem. We present an algorithm which exploits feedback capabilities of the mobile users regarding the outcome of a transmission, and adapts the introduced protection respectively. Moreover, we provide an extensive analysis of the proposed ALFEC algorithm accompanied by a performance evaluation against common error protection schemes.}, author = {Christos Bouras and Nikolaos Kanakis} } @article {4259, title = {MCS Selection Exploiting Femtocells Utilization in Multicast Transmissions}, journal = {International Journal of Communication Systems, Wiley InterScience}, volume = {31}, year = {2018}, abstract = {Multicast-Broadcast over Single Frequency Network (MBSFN) technology, as introduced by the Long Term Evolution Advanced (LTE-A) group, is expected to be part of the upcoming cellular systems offering resource efficiency to broadcast services. MBSFN transmission is suitable to serve multicast groups searching the same content. In addition, the fast emerging technology of femtocells networks and their hybrid nature can lead to efficient resource sharing between non-subscribed users when located inside their coverage. The focus of this manuscript is twofold; firstly, we have contacted simulation experiments to compare the MBSFN transmission with the traditional PTP transmission for various femtocell distributions and network topology changes; secondly, a novel multicast transmissions mechanism is proposed from non-subscribed users who exploit femtocells resources for broadcast services, without limiting user{\textquoteright}s data requirements. The simulation results lead to a significant system{\textquoteright}s performance in terms of average throughput, total capacity and energy consumption.}, author = {Christos Bouras and Nikolaos Kanakis and Vasileios Kokkinos and Nikolaos Papachristos and Demosthenes Vouyioukas} } @article {4193, title = {Online AL - FEC Policy Problem on Mobile Unicast Services}, journal = {Physical Communication, Elsevier Science}, volume = {23}, year = {2017}, pages = {95-102}, abstract = {

Forward error correction (FEC) is a method for error control of data transmission adopted in several mobile multicast standards. FEC is a feedback free error recovery method where the sender introduces redundant data in advance with the source data enabling the recipient to recover from different arbitrary packet losses. Recently, the adoption of FEC error control method has been boosted by the introduction of powerful Application Layer FEC (AL-FEC) codes, e.g. RaptorQ codes. Furthermore, several works have emerged aiming to address the shortcomings of AL-FEC protection application utilizing deterministic or randomized online algorithms to enhance the efficiency of AL-FEC error control method. In this work, since the investigation of AL-FEC application as primary or auxiliary error protection method over mobile multicast environments is a well investigated field but the opportunity of utilizing the AL-FEC over mobile unicast services as the only method for error control replacing common feedback based methods that are now considered to be obsolete, we provide an analysis on the feasibility of AL-FEC protection over unicast delivery utilizing online algorithms in conjunction with AL-FEC codes with exceptional recovery performance.

}, author = {Christos Bouras and Nikolaos Kanakis} } @conference {4118, title = {Utilization of Hybrid Access Femtocells During Multicast Transmissions in Mobile Networks}, booktitle = {European Conference on Networks and Communications, Athens, Greece}, year = {2016}, month = {June 27 - 30}, pages = {190-194}, abstract = {

Femtocells enhance indoor coverage of mobile services using the owner{\textquoteright}s broadband connection. They were initially designed to serve a number of subscribed User Equipments within their range. This design however, resulted in underutilization of the femtocells resources, and simultaneously in high interference levels for nearby non-subscribed users. Nowadays, femtocells can support multicast transmissions, while their hybrid operation allows non-subscribed users to use a portion of their resources. In this paper we propose a novel mechanism that is based on the selection of the appropriate Modulation and Coding Scheme. The mechanism allows non-subscribed users to utilize a portion of the femtocells{\textquoteright} resources for multicast transmissions when located inside their coverage, without affecting the owners{\textquoteright} satisfaction. The simulation results show that depending on the portion of the femtocells{\textquoteright} resources allocated to non-subscribed users, the mechanism may significantly increase the average user throughput.

}, author = {Christos Bouras and Nikolaos Kanakis and Vasileios Kokkinos and Nikolaos Papachristos and Demosthenes Vouyioukas} } @conference {4069, title = {Online AL-FEC protection over Mobile Unicast Services}, booktitle = {European Conference on Networks and Communications, Paris, France}, year = {2015}, month = {June 29 - July 2}, pages = {234-238}, abstract = {

Forward error correction (FEC) is a method for error control of data transmission adopted in several mobile multicast standards. FEC is a feedback free error recovery method where the sender introduces redundant data in advance with the source data enabling the recipient to recover from different arbitrary packet losses. Recently, the adoption of FEC error control method has been boosted by the introduction of powerful Application Layer FEC (AL-FEC) codes i.e., RaptorQ codes. Furthermore, several works have emerged aiming to address the efficient application of AL-FEC protection introducing deterministic or randomized online algorithms. The investigation of ALFEC application as primary or auxiliary error protection method over mobile multicast environments is a well investigated field. However, the opportunity of utilizing the AL-FEC over mobile unicast services as the only method for error control, replacing common feedback based methods that are now considered to be obsolete, is not yet examined. In this work we provide an analysis on the feasibility of AL-FEC protection over unicast delivery utilizing online algorithms on the application of AL-FEC codes with exceptional recovery performance.

}, author = {Christos Bouras and Nikolaos Kanakis} }