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Utility optimization-based bandwidth allocation for elastic and inelastic services in peer-to-peer networks

Li Shiyong, Zhang Yue, Wang Yan, Sun Wei

International Journal of Applied Mathematics and Computer Science

2019

Vol. 29, no. 1

111--123

This paper considers reasonable bandwidth allocation for multiclass services in peer-to-peer (P2P) networks, measures the satisfaction of each peer as a customer by a utility function when acquiring one service, and develops an optimization model for bandwidth allocation with the objective of utility maximization. Elastic services with concave utilities are first considered and the exact expression of optimal bandwidth allocation for each peer is deduced. In order to obtain an optimum in distributed P2P networks, we develop a gradient-based bandwidth allocation scheme and illustrate the performance with numerical examples. Then we investigate bandwidth allocation for inelastic services with sigmoidal utilities, which is a nonconvex optimization problem. In order to solve it, we analyze provider capacity provisioning for bandwidth allocation of inelastic services and modify the update rule for prices that service customers should pay. Numerical examples are finally given to illustrate that the improved scheme can also efficiently converge to the global optimum.

Techniczne aspekty ochrony praw autorskich w sieciach peer-to-peer

Aksamit P., Zmarzły D., Paszkiel S., Kawala A.

Zeszyty Naukowe. Elektryka / Politechnika Opolska

2007

Vol. 320, z. 58

49-60

Artykuł przedstawia problematykę naruszania praw autorskich twórców w sieciach peer-to-peer oraz technicznych aspektów ich ochrony. Przedstawione zostały kolejne rozwiązania stosowane w miarę rozwoju sieci peer-to-peer, jak również obecnie spotykane technologie oraz ich związek z technicznymi i prawnymi ograniczeniami, jakie stają przed organizacjami zajmującymi się ochroną majątkowych praw autorskich twórców.

File sharing peer-to-peer networks had become very popular during last few years. This popularity brings many problems among witch the great amount of copyright violations is probably the biggest one. The article discusses different file sharing networks technologies and topologies and their impact on technical and legal aspects of copyright protection issues.