Dynamic Cooperation Enforcement through Trust-based Allocation Policies in P2P Systems

A. Satsiou, L. Tassiulas
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引用次数: 1

Abstract

In this paper we propose distributed trust-based resource allocation policies to provide fairness in p2p-like systems. According to these policies, the portion of the available resource received by each competing peer depends on (a) his trust/reputation, (b) his resource demands and (c) his request generation rate. The reputation of a peer is quantified and an approach for continuously updating the reputation is proposed such that it reflects the contributions of the peer in the transactions he engages. We study both homogeneous and heterogeneous systems of peers with different resource capabilities and needs and we see from theoretical analysis and simulation results that proposed policies motivate peers to contribute resources in the network by guarantying that peers will only receive resources in proportion to their contributions; thus misbehaving (non contributive) peers cannot exploit the system. Furthermore, proposed policies lead to the dynamic formation of coalitions (cooperation) between peers who mutually benefit by their transactions, according to their capabilities and needs. Peers' coalitions are adaptive to network changes and self-organized as new peers enter the system or strategic peers vary their contributions.
基于信任的P2P系统分配策略的动态合作执行
为了在类p2p系统中提供公平性,我们提出了基于信任的分布式资源分配策略。根据这些策略,每个竞争对等体收到的可用资源部分取决于(a)他的信任/声誉,(b)他的资源需求和(c)他的请求生成率。对同行的声誉进行了量化,并提出了一种持续更新声誉的方法,以反映同行在其参与的交易中的贡献。我们研究了具有不同资源能力和需求的节点组成的同质和异构系统,从理论分析和仿真结果中可以看出,所提出的策略通过保证节点只获得与其贡献成比例的资源来激励节点在网络中贡献资源;因此,行为不端的(非贡献的)同伴无法利用该系统。此外,拟议的政策导致同伴之间的联盟(合作)的动态形成,这些同伴根据自己的能力和需求通过交易相互受益。当新的对等体进入系统或战略对等体改变其贡献时,对等体联盟能够适应网络变化并自组织。
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