SEcure data-centric application eXtension (SeDAX) is a publish/subscribe information-centric networking architecture, where publishers send messages to the appropriate message broker over a Delaunay-triangulated overlay network. Resilient data forwarding and data redundancy enable a high level of reliability. Overlay nodes and topics are addressed via geo-coordinates. A topic is stored on primary and secondary nodes, those nodes closest and second-closest to the topic's coordinate, respectively. The overlay automatically reroutes a topic's messages to its secondary node should its primary node fail. In the original proposal, SeDAX determines the coordinate of a topic by hashing its name. This kind of topic allocation is static, which can lead to unintended load imbalances. We propose a topic delegation mechanism to make the assignment of topics to nodes dynamic. Our proposed mechanism is the only existing method to improve the flexibility and resource management of the SeDAX architecture so far. We define three resilience levels that allow information on the SeDAX overlay to survive 0, 1, or 2 node failures, imposing different loads on SeDAX nodes. For this elaborated SeDAX approach, we suggest a distributed resource management system that detects traffic imbalances among SeDAX nodes and re-assigns topics to other coordinates for load balancing purposes. We evaluate the load imbalance for the different resilience levels, for different topic characteristics, and in particular for topics with storage requirements growing over time. The proposed algorithm leads to well balanced load on SeDAX nodes while keeping load redistribution at a reasonable level.

C-DAX is a cyber-secure publish/subscribe middleware tailored to the needs of smart grids, offering end-to-end security, and scalable and resilient communication among participants in a smart grid. While C-DAX' broker-based publish/subscribe mechanisms are well-suited for scalable information dissemination with regard to high numbers of publishers and subscribers, (1) additional transmission delays are inherent to the design because of multi-hop application layer forwarding, and (2) interactive (probably legacy) applications are prohibited due to the one-way publish/subscribe paradigm and potential dependencies on IP communication. This work presents two advanced communication modes for the C-DAX architecture, addressing those issues: (1) broker-less publish/subscribe for delay-sensitive applications, and (2) transparent IP-tunneling over publish/subscribe for legacy applications. Those modes further improve C-DAX' suitability for smart grid applications, including enhanced real-time application support, and transparent support for legacy smart grid communication protocols.

IEEE C37.118 is the current standard for synchrophasor measurements in power systems. It defines the measurement method and communication protocols for the entities in a synchrophasor network. The standard offers two different modes for client-server communication, but cannot be used unchanged over publish/subscribe communication architectures, whose major advantage is simplified and incremental integration of new applications. This work reviews the communication part of IEEE C37.118, and provides an adapter-based solution to easily connect and integrate entities in a synchrophasor network over a publish/subscribe communication architecture. The proposed adapters offer standard-compliant communication between the synchrophasor measurement network entities to facilitate the exchange of measurement data.

SeDAX is a publish/subscribe information-centric networking architecture where publishers send messages to the appropriate message broker over a Delaunay-triangulated overlay network. Resilient data forwarding and data redundancy enable a high level of reliability. Overlay nodes and topics are addressed via geo-coordinates. A topic is stored on primary and secondary nodes, those nodes closest and second-closest to the topic's coordinate, respectively. The overlay automatically reroutes a topic's messages to its secondary node should its primary node fail. Currently, SeDAX determines the coordinate of a topic by hashing its name. This kind of topic allocation is static, which can lead to unintended load imbalances. In this paper, we propose a topic delegation mechanism to make the assignment of topics to nodes dynamic. Our proposed mechanism is the only existing method to improve the flexibility and resource management of the SeDAX architecture so far. We define the load of SeDAX nodes and coordinates at different levels of resilience. On this basis, we develop distributed algorithms for load balancing. Simulations show that significant load imbalance can occur with static topic assignment and that the proposed algorithms achieve very good load balancing results.

The locator/identifier split is a design principle for new routing architectures that make Internet routing more scalable. To find the location of a host, it requires a mapping system that returns appropriate locators in response to map-requests for specific identifiers. In this paper, we propose FIRMS, a "Future Internet Routing Mapping System". It is fast, scalable, reliable, secure, and it is able to relay initial packets. We introduce its design, show how it deals with partial failures, explain its security concept, and evaluate its scalability.