142 ◾ Mobile Evolution: Insights on Connectivity and Service
hand, QoS (Quality of Service) is a technology-centric control scheme, which is tuned as needed
to deliver a desired level of quality for a multimedia rendered to the mobile user.
Corruption of a wireless data link, resulting from a loss of signal integrity, which is probable
in the implicit uncertainties associated with the nature of a radio waves, or congestion resulting
from system resource constraints have an adverse impact on the expected ow of data between
a mobile multimedia service function and the delivery of the service function to the mobile
user. Information loss, delay, or delay variability, characterized by corresponding data packet
loss, delay, or delay variabilit ...