The Bridge - Issue 3, 2021 - 10

Feature
Quality-of-Service Architecture
for Cloud Computing Networking
By Ken R. Owens, Jr. Senior Member, IEEE, VP Cloud Security Engineering, Fiserv, St. Louis, Gamma Theta 1999 and
Steve E. Watkins, Senior Member, IEEE, Department of Electrical and Computer Engineering, Missouri University of Science
and Technology, Gamma Theta 1982
Abstract
Quality-of-service (QoS) performance is an important
consideration for real-time and high-priority traffic on
internet protocol (IP) networks. Service differentiation
can provide a more efficient and customer-oriented
internet. The " best-effort " internet models in use today
cannot provide guarantees or service differentiation
for end-to-end individual and aggregate data flows.
Hardware-based models and software-based models
do not completely address the total service-enabled
solution. We propose a hybrid architecture that
combines software and hardware features to handle
network traffic with diverse QoS requirements. Since
cloud providers leverage IP networks today, the model
is based on a systems engineering approach that uses
cloud computing technologies. The work describes the
conceptual model and the reference model for the
hybrid QoS system. Service levels can be defined in
terms of absolute or relative guarantees on loss, delay,
bandwidth, and burst size. End-to-end characteristics
of individual flows are maintained within the aggregate
flows of cloud network traffic.
THE BRIDGE
I. Introduction
The modern uses of internet networks include real-time
and high-priority traffic that are poorly served by " best
effort " quality guarantees. The need for finer granularity
in service quality is widely recognized [1,2]. Reliability
guarantees and service differentiation are clearly required
for applications with mission-critical business data. A
viable option for end-to-end differentiation of service
is taking advantage of quality-of-service (QoS) features
within the cloud providers network. A path-oriented
technology can be used to support quality guarantees in
existing networks [3]. In conventional " legacy " forwarding,
a router will forward a data packet based on the longest
prefix match for the packet's destination internet protocol
address. As the packet transverses the network, each hop
in turn forwards the packet by reexamining its destination
address; the encoding of the path introduces significant
overhead. In contrast to legacy internet protocol (IP)
networks, a packet is assigned a label upon entry into
a QoS cloud-enabled network. At subsequent hops,the
label is used as an index into the table that specifies the
next hop and a new label. The old label is swapped with
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The Bridge - Issue 3, 2021

Table of Contents for the Digital Edition of The Bridge - Issue 3, 2021

Contents
The Bridge - Issue 3, 2021 - Cover1
The Bridge - Issue 3, 2021 - Cover2
The Bridge - Issue 3, 2021 - Contents
The Bridge - Issue 3, 2021 - 4
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