In 13.16, coordinates of each node are represented by (x,y) digits, with one corner being (0,0) and other three corners being (0,7), (7,0) and (7,7). Assuming that two messages are to be sent at the same time, one from node (0,0) to (7,7) and the second from node (0,7) to (7,0). Identify the transmission sequence of these two messages so that they do not interfere with each other and follow the shortest path.
One such 2-D grid is shown in the Figure, with coordinates of four corner nodes
as (0; 0), (0; 7) , (7; 0) and (7; 7). The message transfer from (0; 0) to (7; 7) will
require a minimum of 14 steps, similar number of hops are needed when a
transfer takes place from (0; 7) to (7; 0). There are many possible solutions and
one of them is shown in the figure. The basic idea to make sure that the two
transfers are not within the transmission range of each other, assuming one hop
moves to next node in a row or a column.
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