Author(s) :   Kalyani Raval

Abstract : Media Access Control sub layer’s primary function is to manage the allocation of one broadcast channel among N competing users. For the same, many methods are available such as static and dynamic allocation method. In the static channel allocation method, allocating a single channel among N competing users can be either Frequency division multiplexing (FDM) or Time division multiplexing (TDM). In FDM the total bandwidth will be divided into N equal parts for N users. This way, every user will have their own frequency band so no conflict or collision will occur among user in the network. But, this is feasible only when the numbers of users are small and traffic is also limited. If, the number of users becomes large this system has face many problems like either one user is gets one frequency band that is not used at all or the other user does not get a frequency band for transmission. Hence, it is simple and efficient for a small number of users. Similarly, in TDM (Time Division Multiplexing), discussed with first Block every user will get a fixed Nth time slot.

In the dynamic channel allocation the important issues to be considered are whether, time is continuous or discrete or whether the station is carrier sensing large number of stations each with small and bursty traffic.

Keywords: Static and Dynamic Channel, Pure ALOHA, Slotted ALOHA.

DOI : 10.61161/ijarcsms.v2i6.1

Pages : 01-04

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