Packet switched networks and message multiplexing have been a major upgrade for industrial systems communications. In the avionics domain, this evolution was brought by the introduction of Avionics Full Duplex Switched Ethernet (AFDX). Guaranteed upper bounds of end-to-end delays for messages transmitted over an AFDX network are mandatory for certification reasons. In this article, we present t...

Consider a network in which adjacent nodes exchange messages via multiple communication channels. Multiple channels between adjacent nodes are desirable due to their cost effectiveness and improved fault-tolerance. We consider the problem of providing deterministic quality of service guarantees in this network. We show that any scheduling protocol designed for a single channel can be converted ...

In this paper, we explore the use of end-to-end unicast traac measurements to estimate the delay characteristics of internal network links. Experiments consist of back-to-back packets sent from a sender to pairs of receivers. Building on recent work 11, 5, 4], we develop eecient techniques for estimating the link delay distribution. Moreover, we also provide a method to directly estimate the li...

A systematic method for connection-wise endto-end delay analysis in asynchronous transfer mode (ATM) networks is proposed. This method consists of the followings: (i) per-stream nodal analysis; (ii) output processes characterization; and (iii) moment matching scheme. Following our previous work [1], we employ H-MMPPs/Slotted D/1 to model ATM queues. Each virtual connection (VC) in ATM networks ...

This paper proposed and evaluates a QOS routing policy in packets topology and irregular traffic of communications network called K-shortest Widest paths Q-Routing. The technique used for the evaluation signals of reinforcement is Q-learning. Compared to standard Q-Routing, the exploration of paths is limited to K best non loop paths in term of hops number (number of routers in a path) leading ...

In this paper, we provide complete end-to-end delay analyses including the relay nodes for instant messages. Message Session Relay Protocol (MSRP) is used to provide congestion control for large messages in the Instant Messaging (IM) service. Large messages are broken into several chunks. These chunks may traverse through a maximum number of two relay nodes before reaching destination according...

Providing end-to-end delay guarantees for delay sensitive applications is an important packet scheduling issue of routers. In this paper, to support end-to-end delay requirements, we propose a novel network scheduling scheme, called the Bulk Scheduling Scheme (BSS), built on top of existing schedulers of intermediate nodes without modifying transmission protocols on both sender and receiver sid...