The ever increasing growth of peer-to-peer networks calls for effective construction of overlays keeping in view the properties and capabilities of the underlay network. The capabilities of the peers participating in the network can be used effectively to bias the neighbor selection and improve the network performance by assigning more responsibility to nodes with high capabilities. This system...

In mobile ad hoc networks there is no pre-existing network infrastructure, and the topology in such networks may be highly dynamic. This gives rise to various challenges to the network routing as well as to network applications. In this paper we discuss the issue of automatically finding services and selecting optimal servers in mobile ad hoc networks, and propose service awareness as a concept...

Data load balancing is a challenging task in the P2P systems. Distributed hash table (DHT) abstraction, heterogeneous nodes, and non uniform distribution of objects are the reasons to cause load imbalance in structured P2P overlay networks. Previous works solved the load balancing problem by assuming the homogeneous capabilities of nodes, unawareness of the link latency during transferring load...

Peer-to-peer overlay networks provide a useful infrastructure for building distributed applications. These networks provide efficient and fault-tolerant routing and object locating within a self-organizing overlay network. This paper presents a multi-dimensional overlay network called RAQNet which is based on RAQ. RAQ supports exact match queries and range queries over multi-dimensional data ef...

At ALGOSENSORS 2004 we presented a first algorithm to detect the boundary in a dense sensor network. This has started a new field of research: how to establish topology awareness in sensor networks without using localization. Three years later, at ALGOSENSORS 2007, we present a number of further results. After discussing issues of distance estimation and computation of coordinates, we give an o...

Considering a commutative unital quantale L as the truth value table and using the tool of L-generalized convergence structures of stratified L-filters, this paper introduces a kind of fuzzy upper topology, called fuzzy S-upper topology, on L-preordered sets. It is shown that every fuzzy join-preserving L-subset is open in this topology. When L is a complete Heyting algebra, for every completel...

in this paper‎, ‎we introduce a new model of point free topology‎ ‎for point-set topology‎. ‎we study the basic concepts in this‎ ‎structure and will find that it is naturally close to point-set‎ ‎topology‎.‎

this paper introduces a new approach to topology, based on category theory and universal algebra, and called categorically-algebraic (catalg) topology. it incorporates the most important settings of lattice-valued topology, including poslat topology of s.~e.~rodabaugh, $(l,m)$-fuzzy topology of t.~kubiak and a.~v{s}ostak, and $m$-fuzzy topology on $l$-fuzzy sets of c.~guido. moreover, its respe...

This paper is concerned with the effect of overlay network topology on the performance of live streaming peer-to-peer systems. The paper focuses on the evaluation of topologies which are aware of the delays experienced between different peers on the network. Metrics are defined which assess the topologies in terms of delay, bandwidth usage and resilience to peer drop-out. Several topology creat...