Heterogeneous Networks (HetNets) have been a crucial point in the evolution of mobile networks th... more Heterogeneous Networks (HetNets) have been a crucial point in the evolution of mobile networks that boost the network performance with the addition of small cells. The use of Enhanced ICIC (eICIC) techniques such as Almost Blank Subframes (ABS) has been introduced in HetNets to protect the small cells from high interferences. However this is done at the expense of lower macrocell user capacities. In this respect, in this work we propose a solution that starts from the principles of ABS and exploits jointly the dimensions of frequency, power and time in order to balance the trade-off between interference mitigation on the small cells and capacity degradation in the macrocells. Comparisons against the classical ABS and other existing solutions show the efficiency of the proposed scheme with improvements in the user capacity that reach up to 26% in the considered scenarios. This is achieved without significant degradation of the performance observed by small cell users.
Contractual date of delivery to the CEC: 30.04.2011 Actual date of delivery to the CEC: 30.04.201... more Contractual date of delivery to the CEC: 30.04.2011 Actual date of delivery to the CEC: 30.04.2011 Project Number and Acronym: 248351- FARAMIR
Next-generation mobile technologies are the enablers for meeting the variable specific requiremen... more Next-generation mobile technologies are the enablers for meeting the variable specific requirements of the public safety (PS) community. In particular, due to the development of commercially deployed 5G networks, PS providers look for ways to implement related solutions upon such infrastructures, potentially in a shared use with existing commercial networks. In particular, LTE and 5G NR networks are rapidly gaining recognition as an all-inclusive critical communications platform for the delivery of both mission and business critical applications. Within this scope, we take into account the innovative architectural approach that has been proposed by the 5G ESSENCE project, addressing the paradigms of edge computing and small cell as-a-service that has been realised via a cloud-enabled small cell infrastructure leveraging multi-access technologies in 5G, where we propose a dedicated PS use case, able to offer a mission critical push-to-talk service as well as a Chat and Localisation s...
Third-generation mobile communication systems will bring a wide range of new services with differ... more Third-generation mobile communication systems will bring a wide range of new services with different quality of service requirements and will open the ability to exploit radio resource management functions to guarantee a certain target QoS, to maintain the planned coverage area and to offer a high-capacity while using the radio resources in an efficient way. RRM functions impact the overall system efficiency and the operator infrastructure cost, so they will definitively play an important role in a mature 3G scenario. In order to provide some insight into RRM strategies implementation, a range of representative case studies with several innovative algorithms arc presented and supported by simulation results in a realistic UMTS Terrestrial Radio Access Network scenario as devised in the 3GGP standardization forum. In particular, a decentralized uplink transmission ratc selection algorithm in the short term, a congestion control mechanism to cope with overload situations, and downlink...
The SESAME 5G-PPP project targets innovations in three fundamental 5G areas such as the “placemen... more The SESAME 5G-PPP project targets innovations in three fundamental 5G areas such as the “placement” of network intelligence and applications in the network edge through NFV and cloud computing, the substantial evolution of the Small Cell concept and the consolidation of multitenancy in modern communications infrastructure. A dedicated architecture has been proposed for that purpose. In the present work and taking onto account recent challenges, we discuss latest innovations and/or potential updates of the corresponding architecture, in specific areas covering the SC-Common VNF as fun-in/fun-out module, the progress in SESAME Small Cell functional splits, the placement of “Self-x” features and wireless backhauling. Moreover, we proceed further and analyse the functional description of the related architectural components, in order to promote future improvements. Keywords—5G; Cloud-enabled Small Cell (CESC); Network Functions Virtualization (NFV); Multitenacy; “Self-x” properties; Sma...
Wireless Communications and Mobile Computing, 2019
Network slicing is a fundamental feature of 5G systems to partition a single network into a numbe... more Network slicing is a fundamental feature of 5G systems to partition a single network into a number of segregated logical networks, each optimized for a particular type of service or dedicated to a particular customer or application. The realization of network slicing is particularly challenging in the Radio Access Network (RAN) part, where multiple slices can be multiplexed over the same radio channel and Radio Resource Management (RRM) functions shall be used to split the cell radio resources and achieve the expected behaviour per slice. In this context, this paper describes the key design and implementation aspects of a Software-Defined RAN (SD-RAN) experimental testbed with slicing support. The testbed has been designed consistently with the slicing capabilities and related management framework established by 3GPP in Release 15. The testbed is used to demonstrate the provisioning of RAN slices (e.g., preparation, commissioning, and activation phases) and the operation of the impl...
ABSTRACT In this paper a comparative study of two measurement campaigns carried out in Barcelona,... more ABSTRACT In this paper a comparative study of two measurement campaigns carried out in Barcelona, Spain, and Poznan, Poland, to identify spectrum occupancy in different bands, is presented. In both cases the measurement setup was harmonized to obtain comparable results. The problem of efficient noise floor estimation was also considered and a pragmatic approach that takes into account both internal and ambient noise has been proposed. Obtained results show significant amount of unused spectrum, with similar results for both sites when analyzed globally (average spectrum occupancy of 27% in Poznan and 22% in Barcelona). On the contrary, when going to the detailed analysis of some specific bands, more relevant differences are obtained. These differences have been observed mainly in the Terrestrial TRunked RAdio (TETRA) bands that in Poland are also used by Code Division Multiple Access (CDMA) 450, as well as in the bands of theGlobal System for Mobile communications (GSM) due to the effects of Universal Mobile Telecommunications System (UMTS) refarming in the 900 MHz band.
Heterogeneous Networks (HetNets) have been a crucial point in the evolution of mobile networks th... more Heterogeneous Networks (HetNets) have been a crucial point in the evolution of mobile networks that boost the network performance with the addition of small cells. The use of Enhanced ICIC (eICIC) techniques such as Almost Blank Subframes (ABS) has been introduced in HetNets to protect the small cells from high interferences. However this is done at the expense of lower macrocell user capacities. In this respect, in this work we propose a solution that starts from the principles of ABS and exploits jointly the dimensions of frequency, power and time in order to balance the trade-off between interference mitigation on the small cells and capacity degradation in the macrocells. Comparisons against the classical ABS and other existing solutions show the efficiency of the proposed scheme with improvements in the user capacity that reach up to 26% in the considered scenarios. This is achieved without significant degradation of the performance observed by small cell users.
Contractual date of delivery to the CEC: 30.04.2011 Actual date of delivery to the CEC: 30.04.201... more Contractual date of delivery to the CEC: 30.04.2011 Actual date of delivery to the CEC: 30.04.2011 Project Number and Acronym: 248351- FARAMIR
Next-generation mobile technologies are the enablers for meeting the variable specific requiremen... more Next-generation mobile technologies are the enablers for meeting the variable specific requirements of the public safety (PS) community. In particular, due to the development of commercially deployed 5G networks, PS providers look for ways to implement related solutions upon such infrastructures, potentially in a shared use with existing commercial networks. In particular, LTE and 5G NR networks are rapidly gaining recognition as an all-inclusive critical communications platform for the delivery of both mission and business critical applications. Within this scope, we take into account the innovative architectural approach that has been proposed by the 5G ESSENCE project, addressing the paradigms of edge computing and small cell as-a-service that has been realised via a cloud-enabled small cell infrastructure leveraging multi-access technologies in 5G, where we propose a dedicated PS use case, able to offer a mission critical push-to-talk service as well as a Chat and Localisation s...
Third-generation mobile communication systems will bring a wide range of new services with differ... more Third-generation mobile communication systems will bring a wide range of new services with different quality of service requirements and will open the ability to exploit radio resource management functions to guarantee a certain target QoS, to maintain the planned coverage area and to offer a high-capacity while using the radio resources in an efficient way. RRM functions impact the overall system efficiency and the operator infrastructure cost, so they will definitively play an important role in a mature 3G scenario. In order to provide some insight into RRM strategies implementation, a range of representative case studies with several innovative algorithms arc presented and supported by simulation results in a realistic UMTS Terrestrial Radio Access Network scenario as devised in the 3GGP standardization forum. In particular, a decentralized uplink transmission ratc selection algorithm in the short term, a congestion control mechanism to cope with overload situations, and downlink...
The SESAME 5G-PPP project targets innovations in three fundamental 5G areas such as the “placemen... more The SESAME 5G-PPP project targets innovations in three fundamental 5G areas such as the “placement” of network intelligence and applications in the network edge through NFV and cloud computing, the substantial evolution of the Small Cell concept and the consolidation of multitenancy in modern communications infrastructure. A dedicated architecture has been proposed for that purpose. In the present work and taking onto account recent challenges, we discuss latest innovations and/or potential updates of the corresponding architecture, in specific areas covering the SC-Common VNF as fun-in/fun-out module, the progress in SESAME Small Cell functional splits, the placement of “Self-x” features and wireless backhauling. Moreover, we proceed further and analyse the functional description of the related architectural components, in order to promote future improvements. Keywords—5G; Cloud-enabled Small Cell (CESC); Network Functions Virtualization (NFV); Multitenacy; “Self-x” properties; Sma...
Wireless Communications and Mobile Computing, 2019
Network slicing is a fundamental feature of 5G systems to partition a single network into a numbe... more Network slicing is a fundamental feature of 5G systems to partition a single network into a number of segregated logical networks, each optimized for a particular type of service or dedicated to a particular customer or application. The realization of network slicing is particularly challenging in the Radio Access Network (RAN) part, where multiple slices can be multiplexed over the same radio channel and Radio Resource Management (RRM) functions shall be used to split the cell radio resources and achieve the expected behaviour per slice. In this context, this paper describes the key design and implementation aspects of a Software-Defined RAN (SD-RAN) experimental testbed with slicing support. The testbed has been designed consistently with the slicing capabilities and related management framework established by 3GPP in Release 15. The testbed is used to demonstrate the provisioning of RAN slices (e.g., preparation, commissioning, and activation phases) and the operation of the impl...
ABSTRACT In this paper a comparative study of two measurement campaigns carried out in Barcelona,... more ABSTRACT In this paper a comparative study of two measurement campaigns carried out in Barcelona, Spain, and Poznan, Poland, to identify spectrum occupancy in different bands, is presented. In both cases the measurement setup was harmonized to obtain comparable results. The problem of efficient noise floor estimation was also considered and a pragmatic approach that takes into account both internal and ambient noise has been proposed. Obtained results show significant amount of unused spectrum, with similar results for both sites when analyzed globally (average spectrum occupancy of 27% in Poznan and 22% in Barcelona). On the contrary, when going to the detailed analysis of some specific bands, more relevant differences are obtained. These differences have been observed mainly in the Terrestrial TRunked RAdio (TETRA) bands that in Poland are also used by Code Division Multiple Access (CDMA) 450, as well as in the bands of theGlobal System for Mobile communications (GSM) due to the effects of Universal Mobile Telecommunications System (UMTS) refarming in the 900 MHz band.
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Papers by Jordi Perez-romero