User's Manual

Table Of Contents

Ver.

CHAPTER 2. System Overview

2600-00FKQFGA2

1.0

− Automatic software and configuration data loading

− Automatic S1/X2 setup

− Self-test

Self-Optimization



PCI auto-configuration

The SON server of the LSM is responsible for allocating the initial PCI in the self-

establishment procedure of a new eNB, detecting a problem automatically, and

selecting, changing, and setting a proper PCI when a PCI collision/confusion occurs

with the neighbor cells during operation.

 Automatic Neighbor Relation (ANR) optimization

The ANR function minimizes the network operator’s effort to maintain the optimal

NRT by managing the NRT dynamically depending on grow/degrow of the neighbor

cells. This function automatically configures the initial NRT of each eNB and

recognizes environment changes, such as cell grow/degrow or new eNB installation

during operation to maintain the optimal NRT. In other words, the ANR function

updates the NRT for each eNB by automatically recognizing topology changes such as

new neighbor cell or eNB installation/uninstallation and adding or removing the

Neighbor Relation (NR) to or from the new neighbor cell.

 Mobility robustness optimization

The mobility robustness optimization function is the function for improving handover

performance in the eNB by recognizing the problem that handover is triggered at the

incorrect time (e.g. too early or too late) before, after, or during handover depending

on UE mobility, or handover is triggered to the incorrect target cell (handover to the

wrong cell) and then by optimizing the handover parameters according to the reasons

for the problem.

 Random Access Channel (RACH) optimization

The RACH Optimization (RO) function minimizes the access delay and interference

through dynamic management of the parameters related to random access.

The RO function is divided into the initial RACH setting operation and the operation

for optimizing parameters related to the RACH. The initial RACH setting operation is

for setting the preamble signatures and the initial time resource considering the

neighbor cells. The operation for optimizing parameters related to the RACH is for

estimating the RACH resources, such as time resource and subscriber transmission

power required for random access, that change depending on time, and for optimizing

the related parameters.

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