Analysis of the downlink of a UMTS network is significantly more challenging than that for the uplink. When the capacity in terms of simultaneous users is calculated, it is usual to refer to "identical users". For users to be identical on the uplink they should have the same bitrate and E{sub}b/N{sub}0. On the downlink, the users should additionally experience identical link loss, out of cell interference and orthogonality. Further, there is no noise rise limit on the downlink. Rather, the downlink transmit power can be thought of as capable of delivering a particular loading factor.
展开▼
机译：对UMTS网络的下行链路的分析比上行链路的挑战更具挑战性。当计算同时用户的容量时，通常有关“相同的用户”。对于用户在上行链路上相同，它们应该具有相同的比特率和e {子} B / N {子} 0。在下行链路上，用户应另外经历相同的链路丢失，超出小区干扰和正交性。此外，下行链路上没有噪声上升限制。相反，可以认为下行链路发射功率作为能够提供特定的装载因子。
展开▼
