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Nowadays, many cloud providers offer Virtual Network Function (VNF) services that are dynamically scaled according to the workload. Enterprises enjoy these services by only paying for the actual consumed resources. From a cloud provider's standpoint, the cost of these services must be kept as low as possible, while QoS is maintained and service downtime is(More)
In this paper, we empirically quantify inherent limitations of merchant switching silicon, which constrain SDNs' innovation potential. To overcome these limitations, we propose a Split SDN Data Plane (SSDP) architecture -- anew switch architecture which allows rapid network innovation by complementing a cost-effective, yet inflexible, front end merchant(More)
In this paper the novel issue of retransmissions allocation in ARQ relay networks is introduced. In ARQ relay networks, the source and relays repeat a signal in response to a request from the destination. The source and relays can repeat once or multiple times with a constant power. Contrary to the protocols where a node is constrained to transmit once, we(More)
Network visualization (NV) has evolved as a key enabling technology for offering the next generation network services. Recently, it is being rolled out in data center networks as a means to provide bandwidth guarantees to cloud applications. With increasing deployments of virtual networks (VNs) in commercial-grade networks with commodity hardware, VNs need(More)
Perceived as a key enabling technology for the future Internet, Network Virtualization (NV) allows an Infrastructure Provider (InP) to better utilize their Substrate Network (SN) by provisioning multiple Virtual Networks (VNs) from different Service Providers (SPs). A key challenge in NV is to efficiently map the VN requests from SPs on an SN, known as the(More)
The deployment of relay nodes is a viable solution to fulfil the demands of high throughput and ubiquitous access for future mobile radio communications. A relay can cooperate by transmitting either a repetition of the previously transmitted signal (repetition coding) or by sending new code bits which have not been transmitted before (incremental(More)
A key challenge in Network Virtualization is to efficiently map a virtual network (VN) on a substrate network (SN) while accounting for possible substrate failures. This is known as the Survivable Virtual Network Embedding (SVNE) problem. The state-of-the-art literature has studied the SVNE problem from infrastructure providers’ (InPs) perspective, i.e.,(More)