Network coding assisted mobile-to-mobile file transfer

Abstract

Abstract-This paper is a sequel of previous work, in which we have studied the problem of congestions on the typically overloaded downlink channels in UMTS (Universal Mobile Telecommunication System) networks. Our concept is based on the uplink/downlink traffic imbalance in 3G wireless networks and is realized by organizing seamless cooperation between peerto-peer and cellular networks using a unified radio interface for both systems. The primary goal is to improve the spectral efficiency of cellular networks by enabling direct mobile-tomobile (m2m) communication on temporarily unused uplink channels for the distribution of a large popular content in a non-real time multicast manner.The aim of this work is to further improve the interaction between cellular and peer-to-peer networks by generalizing the traditional scheduling paradigm. A network coding technique is embedded as a solution to the scheduling problem in the distributed dynamic environment of wireless large-scale networks. We investigate the performance of the system in terms of dependability of information distribution among m2m users.Simulations demonstrate the enhanced performance of the file distribution in terms of file download time. Furthermore, the obtained results highlight that network coding based m2m data transfer allows distribution of popular files to a large number of users while placing minimal bandwidth requirements on the central server.

Cautious view on network coding — From theory to practice

“…The costs of implementing NC in terms computational overhead, memory consumption or network usage is often not considered. However, the attention towards practical implementation problems of NC is on the rise and is increasingly relevant as deployment schemes are being proposed and evaluated [3]- [6]. In [7] and [8], implementation problems are investigated with focus on the computational complexity of coding operations.…”

Efficient Distribution of Large Files in UMTS Supported by Network Coded M2M Data Transfer with Multiple Generations

“…5 and 6 the corresponding simulation outcome is compared to the performance results of the most-utile-m2m [PHGK08] and random-m2m [PSGK07] packet distribution schemes, as well as to the file dissemination performance of the conventional UMTS mode for the same scenario as in Section 3.2 with high traffic load.…”

“…The aim of the analysis performed in the previous paper [PSGK07] was to improve the interaction between cellular and peer-to-peer networks by generalizing the traditional scheduling paradigm. A network coding technique [ACLY00, FBW05] was embedded as a solution to the scheduling problem in the distributed dynamic environment of wireless large-scale networks.…”

“…In the following the system performance for network coded m2m data dissemination using multiple generations (NC-MG-m2m) is compared with that of the simple replicate-and-forward m2m schema, which has been analyzed in our previous paper [PSGK07], in terms of usage of network resources, duration of file download, as well as processing costs. Now, by using generations, files of virtually arbitrary size can be processed.…”

“…In order to operate on files of virtually arbitrary size the above described network coding technique must be modified (for a more detailed description of NC-based m2m file dissemination policy see [PSGK07].…”