Abstract:
Limitations in the contemporary best effort WAN
combined with an increase in demand of the business users for
multimedia are the main challenges for remote desktop solutions.
Thin client remote desktop protocols are now mature enough to
work efficiently over low bandwidth and low quality links for
normal office applications. However, they face significant
challenges when working with more demanding data flows such as
multimedia streams.
This paper introduces the server-side component of the
architecture for remote desktop environment aiming at improving
user perception of the more demanding and network sensitive
multimedia applications and services. Our component maps of
user-perceived Quality of Service (QoS) onto network-level
performance parameters in order to improve overall end-to-end
QoS. The set of perception rules defined for each application and
type of user triggers the adaptation mechanisms to change the
transmission parameters in order to meet end user expectations.
The adaptation mechanisms can optimize the usage of the
available network resources within a dedicated network link both
for different flows within single client connection and for all clients
connected to the same server module. The result of such an
optimization is a new set of connection parameters adjusted to
network state changes and user perception of remote desktop.
In the paper we discuss requirements of such QoS control
mechanisms and respective adaptation mechanisms, followed by
the detailed description of the proposed component architecture.
