Miroslav Popovic

• Swiss Federal Institute of Technology in Lausanne

Some of the industrial processes with hard real-time constraints, such as those commonly found in the context of smart grids, require very reliable packet delivery and multicast. Solutions such as PRP assume deployments over redundant and dedicated networks. SDN gives us an unprecedented opportunity to obtain the same result by using a shared telec...

Applications performing streaming of phasor-measurement data require low latency and losses from the communication network. Traditionally, such requirements are realized through wired infrastructure. Recently, wireless infrastructure has gained attention due to its low-cost and ease of deployment, but its poor quality-of-service is a strong deterre...

Reliable packet delivery within stringent delay-constraints is of paramount importance to mission-critical computer applications with hard real-time constraints. Because retransmission and coding techniques counteract the delay requirements, reliability may be achieved through replication over multiple fail-independent paths. Existing solutions, su...

This paper aims to assess the performance of linear state estimation (SE) processes of power systems relying on synchrophasor measurements. The performance assessment is conducted with respect to two different families of SE algorithms, i.e., static ones represented by weighted least squares (WLS) and recursive ones represented by Kalman filter (KF...

Reliable packet delivery within stringent delay constraints is of primal importance to industrial processes with hard real-time constraints, such as electrical grid monitoring. Because retransmission and coding techniques counteract the delay requirements, reliability is achieved through replication over multiple fail-independent paths. Existing so...

We describe the real-time monitoring infrastructure of the smart-grid pilot on the EPFL campus. We experimentally validate the concept of a real-time state-estimation for a 20 kV active distribution network. We designed and put into operation the whole infrastructure composed by the following main elements: (1) dedicated PMUs connected on the mediu...

We are interested in the security of the MPLS Transport Profile (MPLS-TP), in the context of smart-grid communication networks. The security guidelines of the MPLS-TP standards are written in a complex and indirect way, which led us to pose as hypothesis that vendor solutions might not implement them satisfactorily. To test this hypothesis, we inve...

We are interested in the security of the MPLS Transport Profile (MPLS-TP), in the context of smart-grid communication networks. We find security issues with the Cisco implementation of two MPLS-TP OAM (Operations, Administration, and Maintenance) proto-cols: bidirectional forwarding detection (BFD) and protection state coordination (PSC). BFD is us...

Reliable packet delivery within stringent time limits is a key requirement of smart-grid and other industrial communication networks. The Parallel Redundancy Protocol (PRP), used in this context, duplicates packets at the MAC layer over parallel networks and is thus claimed to repair packet loss in 0 ms. However, PRP has several drawbacks: it works...

Multipath TCP (MPTCP) has been proposed recently as a mechanism for transparently supporting multiple connections to the application layer. It is under discussion at the IETF. We nevertheless demonstrate that the current MPTCP suffers from two problems: P1) Upgrading some TCP users to MPTCP can reduce the throughput of others without any benefit to...

MPTCP has been proposed recently as a mechanism for supporting transparently multiple connections to the application layer. It is under discussion at the IETF. We show, however, that the current MPTCP suffers from two problems: (P1) Upgrading some TCP users to MPTCP can reduce the throughput of others without any benefit to the upgraded users, whic...

We study the energy consumptions of two strategies that increase the capacity of an LTE network: (1) the deployment of redundant macro and micro base stations by the operator at locations where the traffic is high, and (2) the deployment of publicly accessible femto base stations by home users. Previous studies show the deployment of publicly acces...

MPTCP has been proposed as a mechanism to support trans-parently multiple connections to the application layer and is under discussion at the IETF [1]. It can effectively use the available bandwidth and it improves throughput and fair-ness, compared to independent TCP flows in many scenar-ios [2–4]. However we show, by measurements over our testbed...