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Open marketplaces of path services are the next step towards realizing “routing-as-a-service.” Such marketplaces will enable users to select from a set of path services offered by multiple competing network providers so as to construct customized end-to-end paths for their applications. This is analogous to online travel marketplaces that allow users to explore travel options and book their travel...
With regarding to the unbalanced load and the multimedia service of multimedia QoS requirements in GEO/LEO double layer satellite networks, a GEO/LEO double layer satellite networks multi-service routing algorithm is proposed. Based on satellite network topology dynamic discretization, the algorithm defined link initial weights with delay and residual bandwidth and introduced the concept of key link...
In today's production-grade cloud datacenter, cloud service providers do not offer any bandwidth guarantees between VMs, which results in unpredictable performance of tenants' applications. To address this issue, we present SpongeNet, a solution that provides bandwidth guarantees for tenants with a novel network abstraction model and a two-phase VM placement algorithm. Prior solutions have significant...
Today's networks are dominantly based on the Shortest Path First (SPF) routing algorithms. These algorithms assign weighting factors to links statically, such that the routing tables are recalculated only when a topology change occurs. As a result, the network traffic is often unevenly distributed, thus causing the congestion on some links even when the total traffic load is not particularly high...
Research on network virtualization has been active for a number of years, during which a number of virtual network embedding (VNE) approaches have been proposed. These approaches, however, neglect important operational requirements imposed by the underlying virtualization platforms. In the case of SDN/OpenFlow-based virtualization, a crucial example of an operational requirement is the availability...
Background traffic, such as repair, rebalance, backup and recovery traffic, often has large volume and consumes significant network resources in cloud storage systems. While having each application independently schedule its own background traffic can easily generate interference among data flows, causing violation of desired QoS requirements (e.g., latency and deadline), heuristic scheduling algorithms...
The InfiniBand Congestion Control (IB CC) mechanism is able to reduce the negative congestion consequences in many situations. However, its effectiveness depends on a set of configurable parameters that must be adjusted by users to tackle congestion. If the parameters are not appropriately configured, IB CC could negatively impact the network performance and production jobs. Additionally, the IB CC...
With each technology improvement, parallel systems get larger, and the impact of interconnection networks becomes more prominent. Random topologies and their variants received more and more attention lately due to their low diameter, low average shortest path length and high scalability. However, existing supercomputers still prefer torus and fat-tree topologies, because a number of existing parallel...
The InfiniBand Congestion Control (IB CC) mechanism is able to reduce the negative congestion consequences in many situations. However, its effectiveness depends on a set of configurable parameters that must be adjusted by users to tackle congestion. If the parameters are not appropriately configured, IB CC could negatively impact the network performance and production jobs. Additionally, the IB CC...
Three-dimensional stacked memory is considered to be one of the innovative elements for the next-generation computing system, for it provides high bandwidth and energy efficiency. Particularly, packet routing ability of Hybrid Memory Cubes (HMCs) enables new interconnects for the memories, giving flexibility to its topological design space. Since memory-processor communication is latency-sensitive,...
With each technology improvement, parallel systems get larger, and the impact of interconnection networks becomes more prominent. Random topologies and their variants received more and more attention lately due to their low diameter, low average shortest path length and high scalability. However, existing supercomputers still prefer torus and fat-tree topologies, because a number of existing parallel...
Three-dimensional stacked memory is considered to be one of the innovative elements for the next-generation computing system, for it provides high bandwidth and energy efficiency. Particularly, packet routing ability of Hybrid Memory Cubes (HMCs) enables new interconnects for the memories, giving flexibility to its topological design space. Since memory-processor communication is latency-sensitive,...
In this paper, a study about the various routing protocols like Enhanced Interior Gateway Routing Protocol (EIGRP), Routing Information Protocol (RIP) and Open Shortest Path First (OSPF) is done in terms of network convergence time, bandwidth requirement, CPU and Memory utilization. It is found that EIGRP performs better in terms of network convergence time and bandwidth requirements. OSPF and RIP...
The Avionics Full Duplex switched Ethernet (AFDX) is widely used in the new generation of civil aircraft, such as A380 and Boeing787. Some research works have been conducted to optimize virtual links (VLs) design. However, a method that optimizes the VLs design scheme from the perspective of network performability is still missing. Furthermore, the configuration parameters interact with each other,...
In vehicular networks, high mobility and limited transmission range of Road-Side Units (RSU) cause dynamic topological changes and result with interference occurred by transmission of vehicles. Moreover, due to the limited bandwidth of IEEE 802.11p based vehicular communication, providing a fair share of network resources among vehicles is essential for an efficient network management. Therefore,...
Network virtualization has become an important feature for cloud-based services. Virtual networks can be set up over high-capacity optical networks. They consist of virtual links and nodes, which are mapped over physical resources. Operational virtual networks get gradually upgraded to avoid capacity exhaustion and create resources to handle traffic growth. These upgrades require leasing of new virtual...
Common Public Radio Interface (CPRI) is a popular standard to interface the Radio Equipment Control (REC) and the Radio Equipment (RE) in the fronthaul of 5G systems. However, CPRI is expensive to deploy, consumes high bandwidth and, currently, is statically configured. Reconfigurability is highly desirable in 5G systems, and can be classified into two categories: network and bandwidth reconfigurability...
The scalability and geographical location agility of data centers have become two key concerns for those critical cloud applications. However, it is still infeasible to build non-blocking data centers which are scalable, agile and cost-effective, given that current network devices are either closed high-end or performance limited, and the dedicated fiber is expensive and hard to expand. This paper...
As bandwidth demands from high-performance computing (HPC) applications have increased, scalable topology and power-efficiency of network technology are becoming critical parameters for exascale design. Dragonfly topology provides low diameter for exascale networks however, fewer global links reduce the bisection bandwidth while high-radix routers increase the router complexity and area overhead....
In the last years, prominent advances in software virtualization (e.g., Hypervisor) have enabled the agile deployment of cloud services and, at the same time, server consolidation operations through agile Virtual Machine (VM) operations (e.g., start-up, snapshot, cloning, and migrations) across Data Center (DC) servers. On the other hand, such advances pose new challenges in the overall management...
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