Papers by Massimo Condoluci
Wireless Networks
The design of effective radio resource management policies for group-oriented services in beyond-... more The design of effective radio resource management policies for group-oriented services in beyond-4G networks is attracting the interest of the research community. Along this line, this paper analyzes some novel approaches that take advantages of the Device to Device (D2D) communication paradigm with the aim of improving the session quality experienced by mobile users in terms of delay and energy consumption. The basic idea is to enable receivers with a bad cellular link from the evolved Node B (eNodeB) to receive the multicast service through another mobile device located in proximity over a direct link.
Two schemes are proposed that exploit different radio technologies to enable nearby multicast subscribers to establish direct local links, either Long Term Evolution-Advanced (LTE-A) or Wi-Fi Direct.
The effectiveness of the proposed solutions is demonstrated through a comprehensive simulative analysis and compared with traditional techniques that only exploit point-to-multipoint communication from the eNodeB to all the group members not taking advantages of the multi-user diversity or alternative network technologies to serve the multicast users.
ICC'14 - W13: Workshop on Cooperative and Cognitive Mobile Networks
Exploiting short-range technologies like Wi-Fi for achieving benefits in terms of throughput and ... more Exploiting short-range technologies like Wi-Fi for achieving benefits in terms of throughput and energy consump-tion, has been among the first proposals to enhance the data transfer performance in cellular environments. Today, with the advent of high performing Long Term Evolution-Advanced (LTE-A) systems, Device-to-Device (D2D) communication, supporting proximity based services in both licensed and unlicensed bands, has recently come into play. In the context of LTE-A systems, this paper proposes different solutions with reference to a "multicast content distribution service". A comparative analysis between Wi-Fi cooperation and the proposed D2D-based solutions is presented and their pros and cons will be illustrated. The cases where the early conceived wireless cooperation paradigm may still be of interest will be highlighted, while service delivery en-hancements obtained with D2D-based solutions will be evaluated. In particular, when compared to standard multicast solutions, content delivery time and energy savings up to respectively 40% and 80% can be obtained.
IEEE Transactions on Broadcasting , May 2014
Allocating and managing radio resources to multicast transmissions in orthogonal frequency-divisi... more Allocating and managing radio resources to multicast transmissions in orthogonal frequency-division multiple access (OFDMA) systems is the challenging research issue addressed by this paper. A subgrouping technique, which divides the subscribers into subgroups according to the experienced channel quality, is considered to overcome the throughput limitations of conventional multicast data delivery schemes. A low complexity algorithm, designed to work with different resource allocation strategies, is also proposed to reduce the computational complexity of the subgroup formation problem. Simulation results, carried out by considering the Long Term Evolution system based on OFDMA, testify the effectiveness of the proposed solution, which achieves a near-optimal performance with a limited computational load for the system.
IEEE Transactions on Vehicular Technology, 2014
The objective of this paper is to design the radio resource management (RRM) policies for support... more The objective of this paper is to design the radio resource management (RRM) policies for support-ing the effective delivery of multicast service in LTE-A (Long Term Evolution -Advanced) systems. Specifically, we propose multicast subgrouping based solutions to maximize the system efficiency in terms of throughput under the constraints that: (i) all UEs are served, and (ii) the fairness among the activated multicast subgroups is guaranteed to avoid users' dissatisfaction. These results are obtained by modeling the multicast subgroup formation problem through a bargaining game. Moreover, an algorithm, which achieves the optimal fairness-efficiency tradeoff, is proposed to support the system in selecting the most appropriate solution in terms of: (i) subgroups activated over each system carrier, and (ii) resource allocated to them.
IEEE Globecom, Dec 2013
The growing demand for group-oriented services has recently attracted the interest of the researc... more The growing demand for group-oriented services has recently attracted the interest of the research community. Several proposals have been designed for the most promising broadband wireless system, Long Term Evolution-Advanced (LTE-A), to enhance key performance figures such as spectrum efficiency, data rate and user satisfaction. Starting from the standard proposals for multicasting and broadcasting systems, in this paper we investigate the potentialities of Device to Device (D2D) communications for enhancing the performance of multicast communications. While keeping the objective of serving all users in a multicast group, as for the Conventional Multicast Scheme (CMS), more performing Modulation and Coding Schemes (MCS) are adopted in the path from the base station to users, by leveraging D2D links to serve nodes with worse channel conditions. Radio resources for the activated transmission links from the base station and for the D2D links are managed in order to maximize the aggregate data rate. A simulative performance evaluation in a wide set of scenarios shows the significant achievable improvements.
Electronic Journal of Differential Equations, Jan 2013
Nowadays, the growing demand for group-oriented services over mobile devices has lead to the defi... more Nowadays, the growing demand for group-oriented services over mobile devices has lead to the definition of new communication standards and multimedia applications in cellular systems. In this article we study the use of game theoretic solutions for these services to model and perform a trade-off analysis between fairness and efficiency in the resources allocation. More precisely, we model bargaining solutions for the multicast data services provisioning and introduce the analytic resolution for the proposed solutions.
2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)
Long Term Evolution (LTE) is considered the most promising cellular system able to support the gr... more Long Term Evolution (LTE) is considered the most promising cellular system able to support the growing demand of multicast services (e.g., IPTV, video streaming) over mobile terminals. The design of effective strategies for the management of these applications is still an open issue, especially in scenarios where several multicast streams are simultaneously transmitted in a cell. In this paper we propose different resource allocation policies for the delivery of multicast scalable video flows. Such policies efficiently exploit the multi-user diversity and the frequency selectivity in order to match the requirements of both users and providers. The performance of the proposed strategies is analyzed through simulations by evaluating different cell deployment and user load environments and by focusing on spectral efficiency, throughput, fairness, and amount of resources needed for multicast service delivery. The last parameter is important in practical scenarios where multicast services share the available resources with other flows, e.g., unicast services.
IEEE TRANSACTIONS ON BROADCASTING, vol. 59, no. 4, pp. 658 - 664, Dec. 2013
"This paper addresses the design of an adaptive resource allocation policy for the efficient deli... more "This paper addresses the design of an adaptive resource allocation policy for the efficient delivery of multicast services in Long Term Evolution (LTE) systems.
The proposed approach overcomes the intrinsic inefficiencies of Conventional Multicast Scheme (CMS) related to the different channel quality experienced by the involved users.
The basic idea is to split any multicast group into subgroups and apply subgroup-based adaptive modulation and coding schemes, which enable a more efficient exploitation of multi-user diversity.
The distribution of users into subgroups is determined by the solution of an optimization problem, aiming to improve the network throughput while guaranteeing fairness among multicast members."
IEEE International Conference on Communications (ICC), Jun 2013
Multicast services over Long Term Evolution (LTE) have recently attracted the interest of the res... more Multicast services over Long Term Evolution (LTE) have recently attracted the interest of the research community. Particular attention has been put on handling fairness requirements of multicast users and experienced channel quality. Conventional Multicast Scheme (CMS), Opportunistic Multicast Scheme (OMS), and multicast subgroup formation are the principal policies adopted to address this research issue. Little attention has been given so far to multicarrier systems like LTE-Advanced although the need for solutions appropriate to this system is strongly felt. In this paper we design radio resource management policies for the efficient delivery of multicast services in multicarrier LTE-Advanced systems and show how the relation between fairness and system efficiency can be controlled. Concerning the system resource management, game theoretic bargaining solutions are considered to best model fairness and efficiency (expressed in terms of throughput).
IEEE International Symposium on Broadband Multimedia Systems and Broadcasting, Jun 2013
In this paper, we address the definition of a low-complexity subgroup formation algorithm for mul... more In this paper, we address the definition of a low-complexity subgroup formation algorithm for multicast data delivery in Long Term Evolution (LTE) networks. With this aim, we extend the subgroup merging scheme (SMS), designed for generic Orthogonal Frequency Division Multiple Access (OFDMA) systems, by proposing two low-complexity subgroup formation schemes, named L-SMS and L-eSMS. Such schemes are tailored to exploit the great potentialities of LTE systems. Specifically, L-SMS is proposed in order to improve the scalability of SMS by handling a more efficient subgroup formation scheme with a computational cost which does not depend on the multicast group size. The L-eSMS also improves the resource assignment phase with the aim to achieve better near-optimal performance compared to L-SMS. Through simulations, we evaluated the effectiveness of the proposed schemes in different cell deployment and multicast configuration scenarios. The achieved results underlined that the proposed L-eSMS is well designed in order to guarantee performance close to the optimal one.
IEEE International Symposium on Broadband Multimedia Systems and Broadcasting, Jun 2013
This paper deals with the transmission of group-oriented services, considered as the main value-a... more This paper deals with the transmission of group-oriented services, considered as the main value-added for the future 4G broadband wireless systems. In this scenario, the design of proper resource allocation strategies is a key issue in order to offer high quality services to involved users and to efficiently exploit the available radio resources. In this paper we extend the works existing in literature by evaluating the impact of frequency selectivity on the performance in terms of spectral efficiency achieved when group-oriented services are provided in Long Term Evolution (LTE) and LTE-Advanced (LTE-A) systems. We conducted exhaustive simulation campaigns in order to define the scenarios that could benefit of the exploitation of frequency selectivity in multicast resource allocation. We investigated single- and multi-group scenarios with different application profiles, such as real time video flows, and we considered several deployment cases addressing different channel bandwidth and user configurations.
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), pp. 477-482, September 2012.
This paper focuses on the design of radio resource management policies for multicast service deli... more This paper focuses on the design of radio resource management policies for multicast service delivery in WiMAX networks. With the purpose of finding an alternative solution to the conventional multicast scheme that is conservative towards resource utilization, we propose to use a subgroup-based link adaptation technique that dynamically chooses the modulation and coding schemes based on the perceived channel conditions in each subgroup of multicast receivers. The main idea is to split the multicast destinations into different subgroups depending on the perceived channel quality, and to apply subgroup-based adaptive modulation and coding for a more efficient spectrum exploitation. The performance of different solutions for the subgroups formation will be analyzed and their effectiveness evaluated through simulations to show how the network can take advantage from the proposed subgrouping approach.
IEEE 76th Vehicular Technology Conference (VTC2012-Fall), pp. 1-5, September 2012.
This paper focuses on the design of radio resource management olicies for efficient delivery of m... more This paper focuses on the design of radio resource management olicies for efficient delivery of multicast services in Long Term Evolution (LTE) systems. In order to find alternative solutions to the Conventional Multicast Scheme (CMS), an effective framework is proposed that splits multicast destinations into different subgroups, depending on the User Equipments (UEs) channel quality, and applies a subgroup based Adaptive Modulation and Coding (AMC) scheme. This approach allows a more efficient spectrum exploitation. Game theoretic notions are used for the multicast subgroups formation and the resource allocation problems. The effectiveness of the proposed framework is evaluated and four different bargaining solutions are compared in terms of data rate, fairness, and subgroup configurations.
IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB), pp. 1-5, June 2012
This paper addresses the design of an innovative scheduling algorithm which optimizes the perform... more This paper addresses the design of an innovative scheduling algorithm which optimizes the performance of Multimedia Broadcast Multicast Service (MBMS) in High Speed Packet Access (HSPA) networks. The proposed policy is based on the subgrouping approach which splits multicast members into subgroups and applies a subgroup-based Adaptive Modulation and Coding mechanism. The optimal number of multicast sub- groups with the assigned radio resources is evaluated by solving an optimization problem. The robustness of the proposed approach has been investigated under different pedestrian mobility scenarios. Obtained results demonstrated that user mobility does not meaningfully influence the performance of our policy which allows to minimize the “user dissatisfaction” while increasing the network coverage.
IEEE International Conference on Communications (ICC), pp. 4405-4409, June 2012.
Long Term Evolution (LTE) is the emerging 4G wireless technology developed to provide high qualit... more Long Term Evolution (LTE) is the emerging 4G wireless technology developed to provide high quality services in mobile environments. It is foreseen that multimedia services and mobile TV will assume an important role for the LTE proliferation in mobile market. However, several issues are still open and meaningful improvements have to be introduced for managing physical resources when group-oriented services should be supplied. To this end, we propose a Frequency Domain Packet Scheduling (FDPS) algorithm for efficient radio resource management of Multimedia Broadcast/Multicast Services (MBMS) in LTE networks. The proposed scheduler exploits an optimization process to organize multicast subscribers in subgroups according to channel quality feedbacks provided by users. Optimization is driven by the aim of minimizing the ”user dissatisfaction” with a consequent improvement in the network capacity. The effectiveness of the proposed scheduling algorithm is evaluated through simulation; obtained results demonstrate significant improvement in the multicast traffic performance.
IEEE 30th International Conference on Distributed Computing Systems Workshops (ICDCSW), Jun 2010
In this paper an innovative framework based on the cooperation between MAC and routing protocols ... more In this paper an innovative framework based on the cooperation between MAC and routing protocols is proposed with the purpose of improving the reliability of multicast transmissions in a Mobile Ad hoc NETwork (MANET). The proposed framework adds new features to the On-Demand Multicast Routing Protocol (ODMRP) and to the IEEE 802.11 MAC layer. This choice allows to exploit the mesh-based nature of the ODMRP forwarding scheme, which offers higher reliability and connectivity among multicast members compared to other multicast routing protocols proposed for MANETs. Simulation results have shown the advantages achieved by the proposed solution compared to the straight forward application of legacy ODMRP when coupled with either the standard IEEE 802.11 MAC or the Multicast aware MAC Protocol (MMP). Several scenarios have been analyzed by varying the multicast group size, the node mobility, and by properly tuning the protocols’ parameters (e.g., the maximum number of MAC layer retransmissions). In the various examined scenarios, the proposed solution improves the performance in terms of successfully conveyed multicast packets with a negligible increase in the signaling overhead necessary to guarantee reliable data delivery.
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Papers by Massimo Condoluci
Two schemes are proposed that exploit different radio technologies to enable nearby multicast subscribers to establish direct local links, either Long Term Evolution-Advanced (LTE-A) or Wi-Fi Direct.
The effectiveness of the proposed solutions is demonstrated through a comprehensive simulative analysis and compared with traditional techniques that only exploit point-to-multipoint communication from the eNodeB to all the group members not taking advantages of the multi-user diversity or alternative network technologies to serve the multicast users.
The proposed approach overcomes the intrinsic inefficiencies of Conventional Multicast Scheme (CMS) related to the different channel quality experienced by the involved users.
The basic idea is to split any multicast group into subgroups and apply subgroup-based adaptive modulation and coding schemes, which enable a more efficient exploitation of multi-user diversity.
The distribution of users into subgroups is determined by the solution of an optimization problem, aiming to improve the network throughput while guaranteeing fairness among multicast members."
Two schemes are proposed that exploit different radio technologies to enable nearby multicast subscribers to establish direct local links, either Long Term Evolution-Advanced (LTE-A) or Wi-Fi Direct.
The effectiveness of the proposed solutions is demonstrated through a comprehensive simulative analysis and compared with traditional techniques that only exploit point-to-multipoint communication from the eNodeB to all the group members not taking advantages of the multi-user diversity or alternative network technologies to serve the multicast users.
The proposed approach overcomes the intrinsic inefficiencies of Conventional Multicast Scheme (CMS) related to the different channel quality experienced by the involved users.
The basic idea is to split any multicast group into subgroups and apply subgroup-based adaptive modulation and coding schemes, which enable a more efficient exploitation of multi-user diversity.
The distribution of users into subgroups is determined by the solution of an optimization problem, aiming to improve the network throughput while guaranteeing fairness among multicast members."