Question

you are asked to design a MAC protocol for an access network where N nodes generate data continuously at a constant rate, at x bits/sec per node. Additionally, the traffic aggregated over the nodes is less than but close to the access network total capacity. Would you choose a channel partitioning or random access protocol? Assume if you choose channel partitioning, the channel will be divided into N subchannels ​

Answer 1

Answer:

cwhwebbeskdb djwaa ee sbsmlejver dmdkxhdbr

Answer 2

According to the above scenario, the point must be noted as,

1. each node transmits at a constant rate of x bit/sec
2. traffic is close to total network capacity.

By analysing these two fact it is clear that system each node have a constant transmission rate.

here are some mathematical calculations,

• each node transmits at a rate of x bit per sec

so,

node 1 = x bit/sec

node 2= x bit/sec

node n= x bit/sec

and according to point number 2

traffic is equal to network bandwidth, B said

thus x+ x+ x+ .... x(nth node ) = B

each node gets the equal band

so,

channel partitioning ( FDM frequency division multiplexing )

is the best choice because each node is divided into subchannels and each subchannel gets an equal required band, thus it will utilize full network bandwidth.

#SPJ2