Abstract: As we move towards packet switched based
multimedia wireless cellular networks supporting different
kinds of applications, QoS guarantee for such applications
will be challenging tasks. This article makes a brief review
of several techniques for QoS provisioning in wireless
cellular network. .These techniques are classified into five
categories: call admission control and bandwidth
reservation, buffer and queue management, cross layer
design, distributed dynamic fault tolerant channel
allocation based on distributed mutual exclusion and
evolutionary techniques. The major issues and challenges
in designing CAC for the next generation wireless network
(i.e. 4G) are also discussed. These challenges are mainly due
to translation of QoS parameters and QoS negotiation/
renegotiation among the heterogeneous wireless networks.
The QoS techniques fall into NP class of problems and
therefore evolutionary algorithms are used to give a
suboptimal solution.