The characteristic of mobile communication is that any service can be accessed at any time and anywhere by any user. So in the short construction period

how 3G network can get seamless coverage is a key factor for 3G development. This paper introduces some analysis for dense urban

high service area

suburb

countryside

railroad/road

tunnel

etc. Thereinfo

different solution for countryside is described according to different landform

such as plain

hill/mountain area

water area/hungriness.