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P2PSIP is a protocol for managing multimedia sessions in a distributed architecture, where all participating nodes share and manage network resources like bandwidth and disk space. This paper presents threats associated with P2PSIP protocol and proposes protocol enhancement to mitigate possible attacks. These extensions have been designed for the leading draft of P2PSIP overlay management protocol,...
This paper presents a Cross-Layer scheme that tries to improve the performance of real-time traffic over TCP in 802.11e wireless networks. It is based on a well-known TCP-friendly, binomial algorithm at the Transport layer, which is jointly configured with the 802.11e protocol at the MAC layer. TCP-friendly schemes have shown to improve the quality of media transfer over wired and wireless networks...
This paper presents a security-aware topology control scheme for wireless ad-hoc networks. The proposed topology algorithm builds a connected network based on the security level of each node, in the presence of a security threat such as the denial of service attack. The existing topology control schemes are primarily concentrated on optimizing parameters such as the energy consumption, while maintaining...
Energy constraints restrict the operation of the nodes of a wireless sensor network (WSN). Due to its limited size the sensor node can operate for a limited time. The main approach that significantly improves its lifetime is the sleep/active cycles scheme that is implemented as part of the MAC layer protocol. The two main characteristics of this model are the duty cycle and the synchronization. Protocols...
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