Situational awareness of mobile ad-hoc network nodes for radio reconnaissance systems

W artykule została przedstawiona potrzeba budowania świadomości węzłów w zakresie bezpieczeństwa oraz identyfikacja możliwych rozwiązań dotyczących tej tematyki. Następnie przedstawiono koncepcję mechanizmu budowania świadomości sytuacyjnej węzła oraz jego użycie w mobilnej sieci doraźnej wykorzystywanej w rozpoznaniu elektronicznym.The article depicts the needs for building the situational awareness of military MANET nodes and identifying of some possible solutions. The authors present novel approach for situational awareness assessment and trust-based mechanisms that increase the efficiency and security of communications in military radio reconnaissance system

Adaptation of the Kademila Routing for Tactical Networks

In this paper a modification of the widely used Kademlia peer-to-peer system to tactical networks is proposed. We first take a look at the available systems today to cover the range of possibilities peer-to-peer systems offer. We identify candidates for use in military networks. Then we compare two candidate systems in an environment with highly dynamic participants. The considered environment is focused on the special conditions in tactical networks. Then we give rationale for choosing Kademlia as a suitable system for tactical environments. Since Kademlia is not adapted to military networks, a modification to this system is proposed to adapt it to the special conditions encountered in this environment. We show that optimizations in the routing may lead to faster lookups by measuring the modified algorithm in a simulation of the target environment. We show also that the proposed modification can be used to extend the battery lifetime of mobile peer-to-peer nodes. Our results show that peer-to-peer systems can be used in military networks to increase their robustness. The modifications proposed to Kademlia adapt the system to the special challenges of military tactical networks

Intrusion Detection in Software Defined Networks with Self-organized Maps

The Software Defined Network (SDN) architecture provides new opportunities to implement security mechanisms in terms of unauthorized activities detection. At the same time, there are certain risks associated with this technology. The presented approach covers a conception of the measurement method, virtual testbed and classification mechanism for SDNs. The paper presents a measurement method which allows collecting network traffic flow parameters, generated by a virtual SDN environment. The collected dataset can be used in machine learning methods to detect unauthorized activities

Success Factors for SOA Implementation in Network Centric Environment

This paper discusses challenges and success factors for service oriented architecture (SOA) implementation in network centric environment. The authors identify 9 fundamental challenges for the SOA approach in order to make the biggest benefit for the NATO NEC (NNEC) and increase the mission effectiveness to the highest extent. They cover the areas of applicability to existing military communications and the ability to reflect military processes. Their range is quite broad, pointing out technological as well as SOA governmental problems. The authors emphasize that any COTS solution available on the market today is able to overcome all of them at once. However, they propose solutions to some of the problems and present quick wins that can speed up the process of achieving capabilities in a heterogeneous multinational NEC environment

Organization of routing domains in tactical communication networks

The method of routing domains' organization that ensures reduction of the number of transmitted routing information in the national component of tactical communication network and provides acceptable convergence time of routing algorithm was depicted in this article. Particularly, procedures of dividing the system into routing domains, principles of selection of nodes for routing domains and procedure of selection of routing domains' leaders were presented. The article contains description of simulation tests and presents the results of experiments that confirmed the effectiveness of the solution proposed by authors. The proposed method could be used in the process of tactical communication networks planning.W artykule omówiono metodę organizacji domen rutingowych zapewniającą ograniczenie ilości informacji służbowych przekazywanych w narodowym komponencie taktycznej sieci łączności oraz akceptowalny czas zbieżności algorytmu marszrutyzacji. Skupiono się na przedstawieniu procedur podziału systemu na domeny rutingowe, reguły doboru węzłów do poszczególnych domen oraz procedury wyboru lidera domeny rutingowej. Artykuł zawiera także opis badania symulacyjnego oraz prezentuje wyniki eksperymentów, które w pełni potwierdziły skuteczność rozwiązania zaproponowanego przez autorów. Opracowana metoda może być z powodzeniem wykorzystywana w procesie planowania taktycznych sieci łączności

Web Services Efficiency in Disadvantaged Environment

The article presents results of web services (WSs) efficiency tests carried out in the testbed emulating disadvantaged network environment. The authors discuss the advantage of different WS adaptation techniques that allow to minimize the XML message size (i.e. compression, filtering and binary coding) and the size of JPEG image attachment (i.e., resolution reduction, decreasing colour depth, JPEG compression). The presented results show the efficiency of selected methods that adapt the web services realization to the possibilities of the network. The article is summarized by conclusions and recommendations in terms of sending XML SOAP messages in disadvantaged networks

An effective method of channels assignment for third generation cellular system

An original hybrid method of channels assignment for DS-CDMA system is discussed in the paper. This method combines standard PN codes assignment policy and dynamic channel assignment procedure that minimise the cost of channel assignment. OPNET simulation model DS-CDMA system was used for assessment of the hybrid method. The results of simulation presented in the paper confirmed that the proposed method importantly improves the quality of services in the third generation cellular system