Question

Briefly, Explain the Master-Slave relationship of TDMA and how it allows for more effective utilization of avaliable bandwidth?

Answer 1

TDMA stands for Time Divison Multiple Access. Every user can access full bandwidth but with in time frame alloted to him. In this system, frame type method is used to control the access of bus. Bus is divded into frame groups. Every frames started with a unique combinatons of bit (known as frame syncronization pattern). It is send by bus master. Some time gap is used for internal processng and for state transition of master from current to quisecent. It is also known as time frame gap. There is N no. of time slices after it. Generally, One time slice is assigned to each node in the network. When any node receives frame syncronization pattern, A timer starts which terminates before startig of time slice. every node can transmit in their time frame. When all time frames are completed, master node again allot the syncroization pattern and recycle whole process.

In this way every user can utilize full bandwidth.

There are two types of TDMA

(1) Static : Master node is statically assigned. by default first node will be master node. Problem in this approach is network faiillure when master node fails.

(2) Dynamic: in this master is alloted dynamically when the node is not failed. if node is failed mastership transfereed to next node.