| 1. |
- Athanasiou, George, et al.
(author)
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Association control in millimeterWave wireless access networks
- 2014
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In: 2014 IEEE 19th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks, CAMAD 2014. - 9781479957255 ; , s. 260-264
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Conference paper (peer-reviewed)abstract
- The resource allocation problem of optimal assignment of the stations to the available access points in 60 GHz millimeterWave wireless access networks is investigated. The problem is posed as a multi-assignment optimization problem. The proposed solution method converts the initial problem to a minimum cost flow problem and allows to design an efficient algorithm by a combination of auction algorithms. The solution algorithm exploits the network optimization structure of the problem, and thus is much more powerful than computationally intensive general-purpose solvers. Theoretical and numerical results evince numerous properties, such as optimality, convergence, and scalability in comparison to existing approaches.
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| 2. |
- Avgouleas, Ioannis, et al.
(author)
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Utilizing multiple full-duplex relays in wireless systems with multiple packet reception
- 2014
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In: 2014 IEEE 19th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD). - : IEEE. - 9781479957255 ; , s. 193-197
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Conference paper (peer-reviewed)abstract
- Relay nodes with physical layer cooperation have been used extensively to assist users' transmissions in wireless networks. This network level cooperation has been lately been gaining popularity and analytical expressions of the performance of a network with up to two relay nodes exist in recent literature. In this work, we give simulation results outlining the potential network level benefits of using multiple full-duplex relay nodes. We examine configurations where multiple full-duplex transceivers offer consistent improvement and provide guidelines on using them different network conditions.
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| 3. |
- El-Sayed, H., et al.
(author)
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Evaluation of localization methods in millimeter-wave wireless systems
- 2014
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In: 2014 IEEE 19th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks, CAMAD 2014. - : IEEE conference proceedings. - 9781479957255 ; , s. 345-349
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Conference paper (peer-reviewed)abstract
- Millimeter-wave communications are considered as one of the key technologies for enabling multi-gigabit wireless access and bandwidth demanding applications. An increasing number of these applications, such as smart environments, asset tracking, video surveillance, and specialized location based services, require knowledge related to the location of the wireless devices. Due to the special characteristics of millimeter-wave transmissions, such as high path loss attenuation, oxygen absorption, and antenna directivity, it is challenging to achieve accurate localization. In this overview paper, the performance of localization methods over the millimeter-wave medium is compared under realistic conditions. The prominent localization approaches based on received signal strength, time of arrival, and angle of arrival of millimeter-wave signals, are numerically evaluated by an extensive set of Monte Carlo simulations. It is suggested that localization based on angle of arrival is the most promising for millimeter-wave transmissions.
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| 4. |
- Mesodiakaki, Agapi, et al.
(author)
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Energy Impact of Outdoor Small Cell Backhaul in Green Heterogeneous Networks
- 2014
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In: 2014 IEEE 19TH INTERNATIONAL WORKSHOP ON COMPUTER AIDED MODELING AND DESIGN OF COMMUNICATION LINKS AND NETWORKS (CAMAD). - : IEEE. - 9781479957255 ; , s. 11-15
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Conference paper (peer-reviewed)abstract
- Small cells (SCs) are expected to be densely deployed during the next few years to enhance the network capacity of future heterogeneous networks (HetNets). Due to their dense deployment, not all SCs are expected to have a direct connection to the core network. As a result, some SCs will forward their traffic to the neighboring SCs until they reach the core network, thus forming a multi-hop backhaul (BH) network. Due to the large number of BH links, the BH is expected to be one of the main challenges that future HetNets will have to face. At the same time, traffic demands are growing exponentially resulting in higher energy consumption. Therefore, how to achieve high network energy efficiency becomes of utmost importance. To that end, in this paper, we study the role of BH in future outdoor HetNets aiming to answer to whether or not it could constitute an energy bottleneck for the HetNet. To gain insights, we study the BH energy consumption impact compared to the access network under different traffic distribution scenarios and BH technologies.
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| 5. |
- Ploumidis, Manolis, et al.
(author)
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On the delay of a throughput optimal flow allocation scheme for random access WMNs
- 2014
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In: 2014 IEEE 19th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD). - : IEEE. - 9781479957255 ; , s. 218-223
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Conference paper (peer-reviewed)abstract
- In this paper we consider random access wireless mesh networks with multi-packet reception capabilities where multiple flows are forwarded to the gateways through node disjoint paths. We address the issue of aggregate throughput optimal flow rate allocation with bounded delay guarantees for flows exhibiting both intra- and inter-path interference. In our prior work we have suggested a distributed flow allocation scheme that maximizes the average aggregate throughput of all flows also providing bounded delay guarantees. In this work we evaluate this scheme in terms of delay and compare its performance with the following schemes: a scheme that utilizes paths on a round-robin fashion, one that optimally utilizes the best path only and another one that assigns the maximum possible flow on each path. For the evaluation process Ns2 simulations of several random wireless scenarios are employed.
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| 6. |
- Ramazanali, Hawar, 1979-, et al.
(author)
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Military Training Network with Admission Control using Real-Time Analysis
- 2014
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In: 2014 IEEE 19th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD). - Piscataway, NJ : IEEE Press. - 9781479957255 ; , s. 249-254
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Conference paper (peer-reviewed)abstract
- Military training radio networks typically consist of large numbers of mobile nodes and have to provide real-time (RT) communication between these nodes. This paper introduces a method on how to manage radio resources and provide Quality of Service (QoS) guarantees for heterogeneous traffic by using admission control, deterministic queuing, and scheduling methods. The proposed solution is based on the use of a RT feasibility test in the admission control and earliest deadline first (EDF) scheduling and queuing. This deterministic solution handles heterogeneous traffic through a novel combination of RT downlink and two types of RT uplink dynamic scheduling mechanisms. The uplink scheduling consists of a control packet based mechanism for sporadic RT traffic and a periodic short-latency mechanism for periodic RT traffic. The method presented in this paper is investigated by computer simulation, evaluating its performance and determining the maximum number of nodes supported, given a worst-case user scenario. To the best of our knowledge this is the first centralized protocol designed for a military training network providing application-specific RT support for heterogeneous traffic. ©2014 IEEE.
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| 7. |
- You, Lei, et al.
(author)
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A Performance Study of Energy Minimization for Interleaved and Localized FDMA
- 2014
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In: 2014 IEEE 19TH INTERNATIONAL WORKSHOP ON COMPUTER AIDED MODELING AND DESIGN OF COMMUNICATION LINKS AND NETWORKS (CAMAD). - : IEEE. - 9781479957255 ; , s. 16-20
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Conference paper (peer-reviewed)abstract
- Optimal channel allocation is a key performance engineering aspect in single-carrier frequency-division multiple access (SC-FDMA). It is of significance to consider minimum sum power (Min-Power), subject to meeting specified users demand, since mobile users typically employ battery-powered handsets. In this paper, we prove that Min-Power is polynomial-time solvable for interleaved SC-FDMA (IFDMA). Then we propose a channel allocation algorithm for IFDMA, which is guaranteed to achieve global optimum in polynomial time. We numerically compare the proposed algorithm with optimal localized SC-FDMA (LFDMA) for Min-Power. The results show that LFDMA outperforms IFDMA in the maximal supported user demand. When the user demand can be satisfied in both LFDMA and IFDMA, LFDMA performs slightly better than IFDMA. However MinPower is polynomial-time solvable for IFDMA whereas it is not for LFDMA.
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