MSWIM

Ad hoc networks are composed by independent mobile stations that,besides acting as traffic sources and sinks, cooperate on packet forwarding tasks, acting both as endpoints and routers. The purpose of this work is to analyze the impact of different ...

The 802.15.3 Task Group was formed to create a standard that would enable wireless connectivity of high-speed, multi-media capable portable consumer devices within a Wireless Personal Area Network (WPAN). In particular, the 802.15.3 standard defines a ...

The transmission opportunity (TXOP) mechanism defined in the IEEE 802.11e Hybrid Coordination Function (HCF) allows a wireless station to transmit a burst of frames back-to-back without re-entering the channel contention phase. Unfortunately, the ...

XCP-b proposes a modification to the XCP router algorithm that computes the spare bandwidth. The modification removes the need for an XCP router to know the exact capacity of the channel, making it possible to use the XCP-b variant in transmission media ...

Geographic routing scales well in sensor networks, mainly due to its stateless nature. Still, most of the algorithms are concerned with finding some path, while the optimality of the path is difficult to achieve. In this paper we are presenting a novel ...

In autonomous ad hoc network, nodes belonging to different entities try to maximize their own utilities. Selfish dropping of route control packets relieves node of relaying packets for others and saves its own resources. Current watchdog or ACK-based ...

Next Generation Networks (NGN) will be based upon the "all IP" paradigm. The IP protocol will glue multiple technologies, for both access and core networks, in a common and scalable framework that will provide seamless communication mobility not only ...

To achieve smooth delivery of real-time traffic in heterogeneous mobile networks, QoS-aware MIPv6 handoff is desirable. Considering that different QoS models may be applied in the traffic path, our previously-proposed QoS Agent-assisted MIPv6 handoff ...

Multicast is a very popular bandwidth-conserving technology exploited in many multimedia applications. However, the existing IEEE 802.16 spec. provides no error recovery mechanism (ARQ) for multicast traffic. ARQ absence in wireless networks unreliable ...

In this paper we introduce a ticket distribution scheme for Fast re-Authentication protocol (FAP) for inter-domain roaming. FAP is designed to reduce the authentication time of a mobile user in a visited administrative domain. The approach eliminates ...

Topology discovery in wireless sensor networks typically starts by transmitting a special beacon signal from the sink. This method, although simple and efficient, reveals the location of the sink within the network. We propose an anonymous topology ...

In ad hoc networks, a collection of wireless hosts cooperates to transmit packets to each other, even if they are beyond their direct wireless transmission range. Recently, many proposed routing protocols provide routing services for ad hoc networks. In ...

Radio jamming in wireless sensor networks is an effective means by which an attacker can disrupt communication between sensor nodes. The purpose of such an attack can be to delay or prevent nodes from reporting their readings to the basestation, to ...

Secure time synchronization is a key service for wireless sensor networks (WSN). The special nature of WSNs imposes challenging and intertwined requirements on secure time synchronization design. We show that secure time synchronization techniques ...

Testing Intrusion Detection Systems (IDS) has been a substantial part of the development lifecycle, since the first prototypes and products appeared on the market. Unfortunately, many of the existing principles, procedures and systematic frameworks for ...

Decentralized group key management mechanisms offer beneficial solutions to enhance the scalability and reliability of a secure multicast framework by confining the impact of a membership change in a local area. However, many of the previous ...

Communicating nodes in an ad-hoc network cannot rely on a fixed security infrastructure and cannot assume a specific security mechanism in the network. This requires careful consideration for the security architecture they apply.

In this paper, we ...

Wireless networks are very convenient as they allow mobile users to be connected whenever and wherever they desire. Group key agreement (GKA) protocols are used in these networks to allow secure group communications among the wireless nodes. Password-...

Mobile network is frequently faced with link disconnection problem. In such cases, mobile router in the network takes a role of an access point to the infrastructure. Thus, a mobile router must have both a routing protocol for the moving network itself ...

The end-to-end Quality of Service (QoS) must be ensured along the whole network in order to achieve the desired service quality for the end user. In hybrid wired-wireless networks, the wireless subsystem is usually the bottleneck of the whole network. ...

In ad hoc networks, route discovery and maintenance introduce specific security problems for routing protocols to prevent, detect or respond. For the OLSR routing protocol, the correct routing operation requires an expected node behavior regarding the ...

In this paper, we adopt a probabilistic framework for malware spreading and propose a closed queueing network model that is able to describe analytically the aggregated behavior of an ad hoc network attacked by multiple malicious nodes. In our framework,...

In order to achieve guaranteed services, we need to negotiate network resources providing the required quality of services(QoS). For this reason, the common set-up process of servicesession is divided into three phases. At first, the application ...

MANETs (Mobile Ad hoc NETworks) allow to deploy networks without any preexisting infrastructure. They are appealing approach for battlefield and emergency networks since they permit to easily interconnect the units that are engaged on the field. An unit ...

This paper presents an efficient approach for supporting wireless interactive multimedia streaming services. One of the main goals of wireless video interactive services is to provide priority including dedicated bandwidth, controlled jitter (required ...

Foreseeable 4G environments will extensively take advantage of the concept of context transfer to provide seamless secure handovers between different administrative domains. However, the utilization of context transfer comes with a cost in the users' ...

In this work we focus on resource depletion attacks within IEEE 802.11 networks. This type of DoS attacks is used to exhaust access points' resources resulting in denying service to legitimate clients and rising the opportunity for more sophisticated ...

In this paper we present the architectural design of a secure VoIP conference system for mobile devices, which is using the strong security mechanisms of the Z Real Time Transport Protocol (ZRTP). We also provide implementation fundamentals of the ...