Penalty Shaper to Enforce Assured Service for TCP Flows
نویسندگان
چکیده
Many studies have explored the TCP throughput problem in DiffServ networks. Several new marking schemes have been proposed in order to solve this problem. Even if these marking schemes give good results in the case of per-flow conditioning, they need complex measurements. In this paper we propose a Penalty Shaper (PS) which is able to profile a set of TCP flows so as to improve its conformance to a desired target. The main novelty of this shaper is that the shaping applies a penalty delay which depends on the out-profile losses in a DiffServ network. This penalty shaping can be used with any classic conditioner such as a token bucket marker (TBM) or a time sliding window marker (TSWM). We made an evaluation of the Penalty Shaper on a real testbed and showed that the proposed scheme is easily deployable and allows for a set of TCP flows to achieve its target rate.
منابع مشابه
AIMD Penalty Shaper to Enforce Assured Service for TCP Flows
Many studies explored the guaranteed TCP throughput problem in DiffServ networks. Several new marking schemes have been proposed in order to solve this problem. Even if these marking schemes give good results in the case of per-flow conditioning, they need complex measurements. In this paper we propose a conditioning method to reduce these complex measurements and an AIMD Penalty Shaper (APS) w...
متن کاملTransport of TCP/IP Traffic over Assured Forwarding IP Differentiated Services
The Internet is currently facing a twofold challenge: to increase network capacity in order to accommodate a steadily increasing number of users, and to guarantee the Quality of Service for existing applications as well as for new multimedia applications requiring real-time network response. In order to meet these requirements, the Internet Engineering Task Force is currently defining the Diffe...
متن کاملTwo-Differentiated Marking Strategies for TCP Flows in a Differentiated Services Network
The saw-tooth like behaviors of TCP impact Assured Forwarding Service flows in a differentiated services (diffserv) network. Therefore, we argue the use of TCP-friendly building blocks (or modules) and fairness modules in the diffserv architecture regarding this issue, and propose Two Markers System (TMS) that is able to properly mark packets and fairly share the bandwidth to each flow for thei...
متن کاملA Fair QoS Architecture
In recent research works an emphasis on DiffServ’s inability to provide preferential treatment and fairness for aggregates of micro flows requiring premium and assured services. Responsive TCP traffic is unable to take advantage of the privileged treatment EF and AF classes provide, when QoS is configured. This is due to the performance degradation of TCP flows when integrated with nonresponsiv...
متن کاملAn Implementation of a Service Class Providing Assured TCP Rates within the AQUILA Framework
This paper investigates an attempt to establish a QoS class that supports long-lived, bulk-data TCP flows that require a minimum rate from the network. The approach is based on a model for TCP flows subject to token bucket marking at the network edge and preferential dropping in the core network. The service class adds admission control functionality and a model for multi-RED queue management t...
متن کامل