Dear Guys I will like to add few more things from my side.
BBH allocates fixed frequencies to all TRX’s and then TCH hops from one Trx to another Trx.
1.Frequency plaaning is difficult since 1 frequency is amust for 1 TRX
2.Since the number of hopping frequencies depend on the number of trx so C/I comes not so good
and frequency diversity results are not so good.
1.Good for matured networks
2.easy to plan since each hopping TRX uses onlyvMobile Allocation lists
3.Need to plan BCCH and parameters like HSN and MAIO.