Mobility and portability

Mobility : When the user moves on fast and high speed vehicles while connects during its motion then this connectivity of the user is refereed as mobility. So the mobility is the connectivity with radio terminal in high speed and fast moving vehicles .The degree of mobility with respect to vehicles , is high speed, the  roaming area is large , bandwidth for the large area of mobility is low. .

Portability : The connectivity of the subscriber with the base station in a cell by walking speed , is referred as portability . the degree of portability is low speed connectivity. The roaming for portability is small and bandwidth is very high.

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