Infra structure topology

In infrastructure topology, there is a fixed (wired) infrastructure that supports communication between mobile terminals and between mobile and fixed terminals. The infrastructure networks are often designed for large coverage areas and multiple base stations or access point operations. Most of the discussion in this section is around this type of operation. The following image shows the basic operation if an infrastructure network with a single BS/AP. the AP serves as the hub of the network and the mobile terminals are located at the ends of the spokes. Any communication from one wireless user station to another, that is, between peers, has to be sent through the BS/AP. The hub station usually controls the mobile station is involved in managing user access of the network.

CSWFQ

CSWFQ tries to achieve both short-term fairness in the rate proportional guarantee sense and a reasonable system throughput. In wireless systems, the situation is different notably with respect to the amount of bandwidth seen by the different flows at any given time. A flow might be anything like real time or non-real time traffic and many more. Scheduling is done for each and every flow based on several criteria