英语翻译At present,the GSM network foresees a fixed carrier allo

英语翻译
At present,
the GSM network foresees a fixed carrier allocation (FCA)
strategy where a semipermanent carriers-to-cells assignment
is present.This means that this assignment can be rearranged
only on a medium-term (i.e.,nonreal-time) basis,and thus
the GSM network is not able to adapt itself to the dynamic
traffic evolution in the cells.
几个词不能表达出来：1.Foresees 2.Where a ...is present 这里的present 3.medium-term /nonreal-time
大家帮忙组织下这句该如何翻译.
carriers-to-cells
我只听过CALL-BY-CALL。