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We address the problem of dissemination of application data in distributed systems over wireless networks with priority structure, with two key constraints.1 Firstly, data elements within a flow are characterized by application-context sensitive information priorities, requiring dynamic packet marking capabilities. Secondly, the significant performance variability of the wireless environment reduces...
We have created a framework to design and study distributed topology control algorithms that combine network-formation games with machine learning. The algorithms rely on game players to pursue selfish actions through low-complexity greedy algorithms with low or no signaling overhead. Convergence and stability are ensured through proper mechanism design that eliminates infinite adaptation process...
Mobile tactical MANETs are interconnected via a quasi-static backbone network (QSN) that is relatively stationary and has substantial radio bandwidth capability. Because of high mobility and terrain sensitivity, the bandwidth available to mobile nodes within the MANET may vary significantly over time. During the periods where the bandwidth available is reduced, MANET nodes may be unable to handle...
Mobile tactical MANETs are subject to periods of intermittent connectivity and transient events of significant packet loss. Because of such disruptions, protocols and technologies have been proposed that are disruption and delay tolerant. One class of such systems works by storing messages/packets in the network. If connectivity to neighbors is lost, missing messages may be delivered when connectivity...
Link state routing protocols such as OSPF synchronize the topology databases by flooding link state update messages periodically or whenever there is a connectivity change. When deployed in wireless networks with mobility and noisy channels, OSPF incurs frequent link creation and deletion and subsequent route changes. To cope with this problem, we propose an Adaptive Link Establishment (ALE) scheme...
In this paper , we present a flexible, modular architecture to combine various link state related measurements and prediction algorithms in order to accurately predict link failure in MANETs, while keeping bandwidth and energy overhead low. Our architecture can automatically adjust to varying environment, measurement availability, and prediction algorithm accuracy by dynamically adjusting and learning...
This paper presents an integrated approach to IP fast reroute (IPFRR) of both unicast and multicast paths in wireless mobile networks. A distinct feature of the proposed approach is that, instead of modifying existing routing protocols, it employs a soft handoff technique, i.e., temporarily installs pre-computed Loop Free Alternative Paths (LFAPs) until the co-existing routing protocol converges to...
Self deployment of nodes in mobile ad hoc networks (MANETs) is a challenging task due to the characteristics of a MANET such as dynamically changing topology, lack of centralized authority, decentralized architecture and heterogeneous nodes. In military applications where the deployed nodes, due to their limited communication ranges and hostile environment, may act selfishly with conflicting individual...
In this paper, we propose a novel approach, which is termed heterogeneous intelligent filtering (HIF), for intelligent control and application data filtering in multi-domain heterogeneous networks. HIF creates intelligent gateways to rapidly and autonomously adapt the flow of information content to the changing mission needs and network characteristics. HIF employs a MANET management protocol (termed...
One of the major QoS goals for future battlefield networks (FBN) is to ensure multi-level precedence and preemption (MLPP). Ensuring MLPP is difficult, partly due to the networking architecture for FBN which consists of wired ??red?? network connected by encrypted wireless ??black?? network. The security requirements for FBN do not allow passing information from black to red networks. So when congestion...
Traditional approaches for testing MANET protocols and applications prior to field experimentation often involve simulation tools or small-sized physical testbeds. However, simulation tools typically do not run in real-time and rely on simplified models rather than a real system, while physical testbeds are prohibitively expensive to build and operate. A more practical method is to use emulation tools...
We describe the key design concepts of domain area planning utility (DAPU) developed by the PILSNER program to perform high-speed automated planning of future battlefield networks (FBNs). DAPU processes multiple inputs from resource planning such as nodes and their trajectories, planned ground- and air-tier nets, unit task organization (UTO) relationships, and typical communication requirements. It...
Routing for link state routing protocols such as OSPF is determined by computing shortest-paths on the network topology graph. In conventional routing the OSPF link costs are configured a-priori before the network is deployed, and remain fixed until manually changed. If subsequently, link quality degrades or alternate links become available, routing paths may become sub-optimal in terms of throughput...
In the tactical Internet, inter-domain links consist mostly of unreliable and low bandwidth wireless links. To enable seamless routing across different Autonomous Systems (ASes), we propose an inter-domain Traffic Engineering (TE) scheme to reroute traffic when congestion occurs. There are two components for the TE scheme. First, a Traffic Splitting (TS) scheme is used for load balancing among parallel...
Due to its bandwidth efficiency, multicast makes a group-centric communication more viable in wireless ad hoc networks with limited radio resources. PIM-SM, a de facto standard multicast protocol known for its high scalability, is a good fit for a large-scale ad hoc network. However, it does not provide a robust multicast communication under RP outage and host mobility. In this paper, we propose a...
Sustaining a complete and accurate information about MANET nodes is often impractical due to dynamic topology, lack of centralized authority, decentralized architecture and heterogeneous nodes in MANETs. Main concerns for MANET performance are power consumption, topology control, spectrum sharing, and localization, all of which are intensified by node mobility. Another inherent characteristic of mobile...
Increasing efficient use of resources, such as network bandwidth, battery life and processing power, is one of the most important challenges in multicast group design for mission-critical networks. In this paper, we present an efficient technique for multicast group planning in a mission-critical network. Our technique increases the number of transmission links shared by any two users in a shortest-path...
In multicast group planning in tactical networks (TNs), one of the most important challenges is to maximize the efficient use of network and end-user resources. Hence, multicast groups should be planned cleverly such that the total shared link capacity in a multicast distribution tree is increased and the reception of unwanted traffic at receiver nodes is reduced to a maximum extent. In this paper,...
In this paper, considering user vicinity information, maximum tolerable unwanted traffic, and routing overhead, we introduce a new two-stage multicast group planning technique which has many applications in tacticalnetworks (TN) used in the futurebattlefieldnetworks (FBN). We formally define channelizationproblem with respect to nofalseexclusion and minimumfalseinclusionrequirements. We address:...
Dynamic survivable resource pooling (DSRP) is a new mechanism to improve the survivability and reliability in distributed wireless mobile robotics systems. DSRP is based on a virtual backbone, which is a highly distributed, scalable, and survivable network, formed and maintained through one-hop beacons among mobile robots. We implement the DSRP mechanism in our FPGA-based distributed robotics testbed...
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