Jari Salo1
and Eduardo Zacarías B.2
Nokia Networks 1Taguig City, Phillipines and 2Ulm, Germany
Abstract
A recurring topic in LTE radio planning pertains to the maximum acceptable LTE radio interface load, up to
which a targeted user data rate can be maintained. We explore this topic by using Queuing Theory elements
to express the downlink user throughput as a function of the LTE Physical Resource Block (PRB) utilization.
The resulting formulas are expressed in terms of standardized 3GPP KPIs and can be readily evaluated
from network performance counters. Examples from live networks are given to illustrate the results, and the
suitability of a linear decrease model is quantified upon data from a commercial LTE network.
Keywords
LTE, Traffic Model, Processor Sharing, Network Measurements
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