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 networks. With the evolution of new wireless technologies such as ...
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resourceallocation remains a challenging issue in communication networks, and its complexity is continuously increasing with the densification of the networks. With 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 case. In 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 used. Our 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 capacity. In 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 spectrum. The 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 interference mitigation techniques used by communication networks. The results show that one approach may perform better 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 traffic. The results, therefore, confirm that there may not be a single algorithm that visibly outperforms other candidates in terms of all performance criteria. Instead, their efficiency is always a consequence of a strategic choice of goals, and the targeted parameters are optimized at a price. Thus, the development and implementation of resource allocation algorithms must follo
The next radio generations of mobile networks, Fifth Generation (5G) and beyond, are expected to speed up the transition from monolithic and inflexible networks to agile and distributed networking elements that rely o...
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The next radio generations of mobile networks, Fifth Generation (5G) and beyond, are expected to speed up the transition from monolithic and inflexible networks to agile and distributed networking elements that rely on "virtualization", "softwarization", openness, intelligent and yet fully interoperable Radio Access Network (RAN) components. At the same time, the increasing popularity of computation-intensive applications on mobile devices has contributed to the overwhelming mobile traffic volume that is pushing against the boundary of the current communication networks' capacity. Besides, mobile platforms are becoming the predominant medium of access to Internet services due to a tremendous increase in their computation and communication capabilities. In light of this, cloud-assisted wireless networks are promising solutions that unite wireless networks and cloud computing to deliver cloud services directly from the network edges. The three emerging paradigms for cloud-assisted wireless networks are: Cloud Radio Access Network (C-RAN), in which the baseband resources are pooled at a Base Band Unit (BBU) based on the fundamentals of centralization and virtualization; Mobile-Edge Computing (MEC), which provides cloud computing and storage capabilities to enable rich services and applications in close proximity to the end-users; and Next Generation RAN (NG-RAN), in which the functional splitting technique is utilized to flexibly balance the radio and computation processes at Central Units (CUs) and Distributed Units (DUs). These paradigms are complementary and have unique justifications within the 5G and beyond ecosystem. The centralized nature of C-RAN provides a higher degree of cooperation in the network to address the capacity fluctuation and to increase the spectral and energy efficiency, whereas the MEC paradigm is useful in reducing service latency and improving localized user experience; on the other hand, NG-RAN provides flexible distribution of computation a
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 ...
详细信息
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.
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