Recent developments in the area of decentralized and infrastructureless systems opened avenues for novel applications. Along with these new technologies, new questions regarding their operational bounds in terms of e.g. scalability and security arose. Due to the sparse presence of real-world decentralized and infrastructureless systems, new protocols and applications have to be scrutinized by means of simulation, in (small-scale) testbeds, and by analytical models. In this paper, we discuss challenges of evaluating security mechanisms for mobile ad hoc networks and peer-to-peer systems. We focus on harmonizing predictions of analytical models and results obtained from simulation studies and testbed experiments. 相似文献
This paper explores the extension of a model for the operation of an ad hoc mobile network to more general providerless networks, such as peer-to-peer systems. The model incorporates incentives for users to act as transit nodes on multi-hop paths and to be rewarded with their own ability to send traffic. The paper explores some of the trust questions that arise in this problem space and conjectures that the very structure of a peer organisation may have some hidden benefits for trust re-enforcement, that have not been previously explored (to our knowledge). 相似文献
This article advocates a novel communication architecture and associated collaborative framework for future wireless communication
systems. In contrast to the dominating cellular architecture and the upcoming peer-to-peer architecture, the new approach
envisions a cellular controlled short-range communication network among cooperating mobile and wireless devices. The role
of the mobile device will change, from being an agnostic entity in respect to the surrounding world to a cognitive device.
This cognitive device is capable of being aware of the neighboring devices as well as on the possibility to establish cooperation
with them. The novel architecture together with several possible cooperative strategies will bring clear benefits for the
network and service providers, mobile device manufacturers and also end users.
Multimedia content currently accounts for over three quarters of all Internet traffic. This increase in traffic volume and content availability derives from a paradigm shift from the traditional text and picture based Web, to more resource demanding audio and video content. A controversial driver for this development is content distribution systems based on peer-to-peer overlay networks. Flooding the Internet with often illegal content, these networks now pose challenges to all actors in the value chain. However, if viewed as surmountable challenges in an evolutionary path, peer-to-peer technology has the potential of increasing efficiency in content distribution and unleashing resources to form scalable and resilient overlay networks of unprecedented dimensions.
In this paper we examine the potentials and challenges of peer-to-peer technology in content distribution, and analyse how, and under which circumstances, peer-to-peer technology can be used to increase the efficiency of multimedia services. The paper provides an up-to-date overview of the development of peer-to-peer networks as well as describing the economics laws governing their use. To conclude the study, the paper analyses Skype, a well known telecommunications service utilising the peer-to-peer technology, as well as demonstrating the benefits of peer-to-peer based content distribution using empirical data from the Danish Broadcasting Corporation. 相似文献
Recent years distribution systems have been witnessed a rapid interconnection of distributed energy resources (DER), solar energy generation and electric vehicles (EV) in particular. To this end, residential and commercial electricity customers equipped with DERs are transforming their roles from pure electricity consumers to prosumers that can switch between electricity consumers and producers. Indeed, if properly managed, DERs of prosumers could bring significant benefits to distribution system operations. Peer-to-peer (P2P) electricity trading in distribution systems has been recently explored, in order to properly manage existing prosumers and to continually promote a deeper penetration of prosumers. This article discusses two types of P2P mechanisms, namely auction-based and bilateral contract-based P2P electricity trading mechanisms, and analyze their effectiveness in properly managing electricity trading among prosumers in distribution systems of the future. 相似文献
A sharing community prospers when participation and contribution are both high. We suggest the two, while being related decisions
every peer makes, should be given separate rational bases. Considered as such, a basic issue is the viability of club formation,
which necessitates the modelling of two major sources of heterogeneity, namely, peers and shared content. This viability perspective
clearly explains why rational peers contribute (or free-ride when they don’t) and how their collective action determines viability
as well as the size of the club formed. It also exposes another fundamental source of limitation to club formation apart from
free-riding, in the community structure in terms of the relation between peers’ interest (demand) and sharing (supply). 相似文献