We present the virtualization of multi-domain optical networks considered in the STRAUSS project. Novel resource allocation algorithms for virtual network embedding on Elastic Optical Networks (EON) are proposed. The ...
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ISBN:
(纸本)9781479956012
We present the virtualization of multi-domain optical networks considered in the STRAUSS project. Novel resource allocation algorithms for virtual network embedding on Elastic Optical Networks (EON) are proposed. The devised algorithms focus on maximizing the link utilization and reducing the Virtual EONs (VEON) blocking rate. The algorithms have been evaluated in terms of three figures of merit, namely, the blocking rate, the link utilization and the processing time.
resourceallocation remains a challenging issue in communication networks,and its complexity is continuously increasing with the densification of the *** the evolution of new wireless technologies such as Fifth Genera...
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resourceallocation remains a challenging issue in communication networks,and its complexity is continuously increasing with the densification of the *** the evolution of new wireless technologies such as Fifth Generation(5G)and Sixth Generation(6G)mobile networks,the service level requirements have become stricter and more heterogeneous depending on the use *** this paper,we review a large body of literature on various resourceallocation schemes that are used in particular in mobile wireless communication networks and compare the proposed schemes in terms of performance indicators as well as techniques *** review shows that among the strategies proposed in the literature,there is a wide variety of optimization targets and combinations thereof,focusing mainly on performance indicators such as energy efficiency,spectral efficiency,and network *** addition,in this paper,selected algorithms for resourceallocation are numerically analyzed through simulations to compare and highlight the importance of how the resourcealgorithms are implemented to achieve efficient usage of the available *** performance of selected algorithms is evaluated in a multi-cell heterogeneous network and compared to proportional fair and eICIC,a widely-used combination of resourceallocation and interferencemitigation techniques used by communication *** results show that one approach may performbetter when looking at the individual average user data rate but worse when looking at the overall spectral or energy efficiency,depending on the category of *** results,therefore,confirm that theremay not be a single algorithmthat visibly outperforms other candidates in terms of all performance ***,their efficiency is always a consequence of a strategic choice of goals,and the targeted parameters are optimized at a ***,the development and implementation of resource allocation algorithms must follow concrete usage scenarios and ne
We present the virtualization of multi-domain optical networks considered in the STRAUSS project. Novel resource allocation algorithms for virtual network embedding on Elastic Optical Networks (EON) are proposed. The ...
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ISBN:
(纸本)9781479956029
We present the virtualization of multi-domain optical networks considered in the STRAUSS project. Novel resource allocation algorithms for virtual network embedding on Elastic Optical Networks (EON) are proposed. The devised algorithms focus on maximizing the link utilization and reducing the Virtual EONs (VEON) blocking rate. The algorithms have been evaluated in terms of three figures of merit, namely, the blocking rate, the link utilization and the processing time.
In order to enhance the network throughput for modern fiber optic networks, disruptive capacity-expanding technologies are emerging, such as spatial division multiplexing or adding L-band transmission, at the cost of ...
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The vertex colouring problem (VCP) and its generalisations have myriad applications in computer networks. To solve the VCP with $\Delta + 1$Delta+1 colours, numerous distributed algorithms based on LOCAL model have be...
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The vertex colouring problem (VCP) and its generalisations have myriad applications in computer networks. To solve the VCP with $\Delta + 1$Delta+1 colours, numerous distributed algorithms based on LOCAL model have been proposed to reduce time complexity (the number of rounds), where $\Delta $Delta is the maximum vertex degree in the graph. In this paper, the authors present a distributed algorithm based on modified LOCAL model (DIAMOND) that reduces the number of rounds to one. It greedily solves the VCP with at most $\Delta + 1$Delta+1 colours. Computational results on Geometry (GEOM) graphs show that the number of used colours to colour each instance using DIAMOND is about $\left({\Delta + 1} \right)/2$mml:mfenced close=")" open="("Delta+1/2. DIAMOND is easily extended to solve greedily generalised VCPs in only one round. Moreover, they present two efficient resource allocation algorithms using DIAMOND. They allocate more resource to the graph compared with $\lpar \Delta + 1\rpar $(Delta+1)-colouring and even to $\lpar \bar d + 1\rpar $(d over bar +1)-colouring algorithms, where $\bar d$d over bar is the average vertex degree of the graph. They run in two and $\Delta $Delta rounds.
In this paper, we present a model of visible light communication (VLC) systems which exploit light beams for downlink transmission. A calculation method is proposed for light beam configuration (LBC) which guarantees ...
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ISBN:
(纸本)9781509027118
In this paper, we present a model of visible light communication (VLC) systems which exploit light beams for downlink transmission. A calculation method is proposed for light beam configuration (LBC) which guarantees no blind areas in the whole VLC coverage while minimizing the number of light beams. As a major contribution in this paper, a light beam allocation algorithm (LBAA) is proposed which aims to eliminate interferences between inter VLC Access Points (inter-APs) by using information of incoming data queue length and co-channel interference (CCI) conditions to decide which VLC beams are used for transmitting data to appropriate user equipment (UEs). By deploying the proposed algorithm, CCI can be eliminated because noise-effected regions and noise-free regions can be separated. Performance of the novel LBAA is analyzed, evaluated and then compared with that of another light beam allocation method using the Round-Robin algorithm. Performance results show that there are significantly improvements in term of SINR, user throughput and packet delay parameters when deploying the proposed LBAA.
We propose a multi-domain resource broker to dynamically provision multi-domain virtual optical networks across heterogeneous control domains (i.e., GMPLS and OpenFlow) and transport (i.e., optical packet switching an...
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We propose a multi-domain resource broker to dynamically provision multi-domain virtual optical networks across heterogeneous control domains (i.e., GMPLS and OpenFlow) and transport (i.e., optical packet switching and elastic optical networks) technologies. We have designed, implemented, and experimentally evaluated the multi-domain resource broker in an international test-bed across Spain, the UK, and Japan.
A virtualization architecture is presented for deploying multitenant virtual networks on top of multi-technology optical networks. A multidomain network hypervisor (MNH) and a multidomain SDN orchestrator (MSO) are in...
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A virtualization architecture is presented for deploying multitenant virtual networks on top of multi-technology optical networks. A multidomain network hypervisor (MNH) and a multidomain SDN orchestrator (MSO) are introduced with this purpose. The MNH provides an abstract view of each virtual network and gives control of it to each independent customer SDN controller. The MNH is able to provide virtual networks across heterogeneous control domains (i.e., generalized multiprotocol label switching and OpenFlow) and transport technologies (i.e., optical packet switching and elastic optical networks). The MSO is responsible for providing the necessary end-to-end connectivity. We have designed, implemented, and experimentally evaluated the MNH and MSO in an international testbed across Spain, UK, Germany, and Japan.
We present dynamic virtual optical network resourceallocation (VON RA) algorithms for on-demand deployment of virtual wavelength switched optical networks (WSONs), which is handled by a resource broker with a virtual...
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We present dynamic virtual optical network resourceallocation (VON RA) algorithms for on-demand deployment of virtual wavelength switched optical networks (WSONs), which is handled by a resource broker with a virtual network topology manager (VNTM). The resource broker with VNTM dynamically configures and deploys independent instances of virtual WSONs over the same physical optical infrastructure and their own independent virtual generalized multiprotocol label switching control plane. The VON RA is computed by a path computation element using global concurrent optimization, which assigns the resources for the virtual optical links (e.g., wavelengths) and nodes. The experimental assessment and performance evaluation have been carried out in the ADRENALINE testbed. We discuss the obtained results on a National Science Foundation Network topology in terms of the VON request blocking rate and VON setup delay, which are used to compare the different proposed algorithms.
In this paper, we propose two efficient and practical resource allocation algorithms to maximize the weighted sum-rate of coordinated multipoint (CoMP) transmission with joint processing in multiuser multiple-input mu...
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ISBN:
(纸本)9781479935130
In this paper, we propose two efficient and practical resource allocation algorithms to maximize the weighted sum-rate of coordinated multipoint (CoMP) transmission with joint processing in multiuser multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems subject to per-antenna power constraints. We first propose a continuous-rate algorithm that utilizes successive convex approximation (SCA) to dynamically allocate the transmit powers of multiple CoMP base stations (BSs) transmitting to multiple co-channel user terminals (UTs). Next, we propose a discrete-rate algorithm that takes the continuous-rate result as a starting point and redistributes the transmit powers to obtain a discrete solution. Simulation results are provided to benchmark our continuous-rate algorithm with two alternative approaches: iterative waterfilling (IWF), and zero-forcing beamforming (ZFB). Results show that SCA provides significant sum-rate improvements over IWF in medium to high interference scenarios, and outperforms ZFB in low to medium interference scenarios. Moreover, our proposed discrete rate algorithm produces a higher discrete sum-rate with much lower computational complexity compared to existing algorithms.
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