Capacity and Cell Coverage Based on Calculation of the Erlang Capacity in a WCDMA System with Multi-Rate Traffic(Wireless Communication Technology)

概要

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A scheme to evaluate the number of users and cell coverage of a WCDMA supporting multi-rate traffic is newly presented through calculation of the realizable Erlang capacity from a derived blocking probability and the path loss from the COST231 Walfisch-Ikegami (WI) model. Based on this analytical scheme, we evaluate the voice-data Erlang capacities at various data rates of 15kbps to 480kbps and the relationship between the cell coverage and the number of active users from them. When the value of E_b,/I_0 is low from 4 dB to 3 dB under voice user capacity of 50 Erlang at 8 kbps, the result shows that the data user capacity is increased to 10 Erlang at low rate of 15 kbps and the cell coverage is enlarged to 100 m, and it is also shown that its capacity is increased to 0.2 Erlang at high rate of 480 kbps and its coverage to 50 m.
社団法人電子情報通信学会の論文
2004-08-01