Andreas Alexelis, 山崎達也,蓮池和夫
A Distributed Resource Allocation Scheme
over Diffserv, towards End-to-end QoS Assurance
Abstract:In recent years, the concept of Quality of Service (QoS) has gained attention in the network research community and it is generally agreed that a crucial factor for the longlivity and usability of Internet will be it's extension to deliver QoS level assurance to QoS-sensitive applications. The Differentiated Services Architecture (DiffServ) proposes a general framework for differentiated treatment of traffic aggregates in the core network. DiffServ does not extend to end-to-end QoS assurances. Most of the complementary approaches proposed (RSVP, circuit-based QoS Broker etc.) have several drawbacks concerning scalability, time complexity, network utilization and administrating range. In this paper, we propose a simple resource-broking scheme operating over an hierarchically connected internetwork of administratively-independent, DiffServ-capable domains, a simplified model of Internet.
The proposed approach uses an asynchronous, multi-agent recourse broking scheme that operates locally but avoids conflicts globally. In this way, traffic control reflects the underlying structure of the internetwork, introduces only localized complexity thus scaling up well and permits independence of policy between interconnected domains.