SON Usage and Implementation in StarHub

SON Usage and Implementation in StarHub LTE Project (Singapore) By: Rudi Wijaya

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Dept. / Author / Date

AGENDA

StarHub LTE Network

Optimizer Overview

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ANR Management by Optimizer

PCI Analysis

AGENDA

StarHub LTE Network Optimizer Overview

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ANR Management by Optimizer

PCI Analysis

NSN SON Suite Features in Radio and OSS Plug & Play

SelfConfiguration

PRACH Management

Nokia Siemens Networks E2E SON Suite Open northbound interfaces

Centralised SON

Automated Neighbor Relat. Interference Optimization

LTE SON

Énhanced Packet core SON

Mobility Robustness (MRO)

SelfOptimization

Drive Test Minimization (MDT) Other vendor’s network

Mobility Load Balancing Power Saving

SelfHealing

Cell Outage Detection, Reset and Compensation Alarm Correlation, Root Cause Analysis

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2G/3G SON Distributed SON

StarHub LTE Network • LTE 1800 with 2G RF Sharing • Not using SON Plug and Play hence there is no DHCP server

• Implement and Using Nokia Siemens Networks’ LTE ANR strategy

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StarHub LTE Network • NetAct  OSS5.3 MP1

• Optimizer  Optimizer 3.0 MP2 CD’s 4772 & 4773

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Optimizer Functionalities in StarHub LTE Network • • • • • • • •

PCI-IP Mapping Creation Physical Cell ID management Analyze PCI collisions and violations Reallocate PCI Visualize PCI reuse on map Forbidden Code Set Antenna Editor Distance-based adjacency creation (LTE->GSM)

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AGENDA

StarHub LTE Network

Optimizer Overview

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ANR Management by Optimizer

PCI Analysis

Optimizer

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Provisioning OPT DB

CM DB

Plan

Plan

Foreign cluster CM data Other vendor CM data Local cluster CM data

xml

Vendor X cluster Foreign NetAct cluster For internal use LTE CLT Sharing Session_Indonesia / Ver. 1.0 / Rudi Wijaya 10

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Foreign cluster CM data Other vendor CM data Local cluster CM data

Local NetAct cluster

Provisioning process using CM applications

Export CM Plan from Optimizer CM Editor

Modify Plan (optional)

CM Analyser

Check Plan

CM Operations Mgr

Prepare Plan (automatic)

CM Operations Mgr

Transfer plan to NW

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End

NetAct tools used in the ANR operation • CM Editor • CM Operations Manager • Optimizer • SON Scheduler

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RL 25TDD, RL 30 SITE BTS(eNB) CELL

Intra LTE Adjacency (pointer to target eNB)

Mobile triggers LNREL creation. eNB creates it automatically for all the neigbors that are reported.

ADJLL, LNREL

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LTE Network Elements (RL 25TDD, RL 30) LNBTS

0..64

1..6

LNADJ LNCEL

Optimizer creates an ADJLL for each LNADJ that doesn’t have the corresponding LNREL.

0..389

ADJLL

Present in CM and in Optimizer Present only in Optimizer For internal use LTE CLT Sharing Session_Indonesia / Ver. 1.0 / Rudi Wijaya 15

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0..389

LNREL

LNADJ

AGENDA

StarHub LTE Network

Optimizer Overview

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ANR Management by Optimizer

PCI Analysis

Optimizer 3.0 CD3 for LTE Use cases for Optimizer in LTE network: 1. New planned eNBs in the network 2. Handover in LTE network : case of an unknown cell

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Automated Neighbor Relation (ANR) Features

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Architecture of Automated Neighbor Relation (ANR)

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LTE 782 – ANR UE Fully Based

eNB2

eNB1

MME

1.) S1AP: ENB CONFIGURATION TRANSFER to eNB2-ID (SON Information Request)

2.) S1AP: MME CONFIGURATION TRANSFER to eNB2-ID (SON Information Request) 3.) S1AP: ENB CONFIGURATION TRANSFER to eNB1-ID (SON Information Response with IP@)

4.) S1AP: MME CONFIGURATION TRANSFER to eNB1-ID (SON Information Response with IP@)

X2 Establishment

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1/2

LTE 782 – ANR UE Fully Based

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2/2

Not Implementing LTE 782 - ANR UE Fully Based • • • •

Current NSN MME has been upgraded to NS2.1 ANR UE Fully Based is supported only in NS2.2. Radio part is OK and Tested! Where CGI resolution of Target eNB can be seen and transfer to Source eNB. Afterward, it should get X2 CP IP Addr given by MME. Unfortunately MME is not transferring the needed information to Target eNB.

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Optimizer 3.0 CD3 for LTE LTE492 Automated Neighbor Relation (ANR) PCI = 3

PCI 4 PCI = 5

PCI = 4 IP@ = 1 ADIPNO IP@1

PCI = 0

IP@2 IP@3 PCI = 2

PCI = 1 IP@ = 2

IP@4 ….. IP@32

In autoconfiguration the neighbor eNBs’ IPs are stored in ADIPNO object or in LNADJs and the eNBs get this data from Configurator. Based on this the X2 connection to neighbor relations can be established.

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LTE492: Automated Neighbor Relation (ANR)

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Preparation for Optimizer • In optimizer, sites can be listed by using browser

• Site list can be exported and check the consistency with on-air sites from MR-Status For internal use LTE CLT Sharing Session_Indonesia / Ver. 1.0 / Rudi Wijaya

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Preparation for Optimizer • Add the new sites and updated the sites with changed antenna information • Prepared the Outdoor and Indoor Antenna Import Files

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Preparation for Optimizer • When importing the antenna data files in Antenna Data Editor (Optimizer), you may have a message in problem window

• Recommended to check the same line number in your imported excel file • Probably because of wrong cell name, missing antenna data, 2-sector and indoor For internal use misconfiguration LTE CLT Sharing Session_Indonesia / Ver. 1.0 / Rudi Wijaya 27

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Preparation for Optimizer • Antenna Data now fully integrated to NetAct OSS and sites are ready to be used in Optimizer

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Preparation for Optimizer • “Refresh Actual” and ready to go for PCI-IP mapping

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Creating PCI-IP Mapping Table • Create a New Plan for your job

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Creating PCI-IP Mapping Table • Check site to site distance to know the range to define the neighbor

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Creating PCI-IP Mapping Table • After planning site to site distance to define the range, you can now put the search distance

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Creating PCI-IP Mapping Table • Now you can create PCI-IP mapping table for your selected sites

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Creating PCI-IP Mapping Table • According to your search distance, the mapping table creation done for neighbour sites.

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Creating PCI-IP Mapping Table • In order to export optimizer plan, click on CM Data Exchange

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Creating PCI-IP Mapping Table • Launch CM Operation Manager and Refresh to see your plan

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Creating PCI-IP Mapping Table • Provision your plan

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Creating PCI-IP Mapping Table • Provision your plan

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Creating PCI-IP Mapping Table • If there is no error and finished the provision, PCI-IP mapping tables are now successfully created in NetAct OSS

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Creating PCI-IP Mapping Table • Check the sites with PCI-IP mapping table in NetAct

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Creating PCI-IP Mapping Table • Now ready to go out for drive testing and you will see the successful hand over in the field • You can also see the LNADJ after coming back from drive testing

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StarHub LTE Network • Downlink Throughput

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LTE784: ANR InterRAT GERAN

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Creating LNRELG • As the project is LTE-2G RF sharing, distance-based adjancy creation can be used. • For creation of LTE=> GSM adjancies • Save the result into the plan and continue results verification in Browser and on the Map

LNRELG

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Creating LNRELG • Click on LNRELG and define the search distance according to network topology

• Run and check the result for numbers of LNRELG created • Listing the results in Browser and also can remove unwanted one For internal use LTE CLT Sharing Session_Indonesia / Ver. 1.0 / Rudi Wijaya 46

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Example of Inter-RAT LTE to GERAN initial neighbor allocation

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AGENDA

StarHub LTE Network

Optimizer Overview

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ANR Management by Optimizer

PCI Analysis

Physical-layer Cell Identities (PCIs)

14 23

502 412

66 1

234 322

98

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PCI group 0 1 2 … 165 166 167

PCI offset 0 1 2 0 1 2 3 4 5 6 7 8 … … … 495 496 497 498 499 500 501 502 503

PCI Collisions and Confusions • 3GPP defines collision-free as “the PCI is unique in the area that the cell covers”

ideally only initial PCI values need to be assigned

• 3GPP defines confusion-free as “a cell shall not have neighboring cells with identical PCIs”

PCI values of ACTUAL cells need to be changed

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PCI Management

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Analyze PCI collisions and violations

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1/5

Analyze PCI collisions and violations

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Dept. / Author / Date

2/5

Analyze PCI collisions and violations

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Dept. / Author / Date

3/5

Analyze PCI collisions and violations

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Dept. / Author / Date

4/5

Analyze PCI collisions and violations

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5/5

Forbidden Codes • Customer want to reserve some PCI group for future Femto Cells • In this case, there are some codes that cannot be used in the allocation • Create a new Forbidden Code Set and assign to the cells

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Summary • Efficient, Easy and User Friendly • Geographical visualization and Analysis • Powerful CM parameters management with Browser • Effective parameters changes • Speed up the rollout project with accurate neighbor creation and parameters managements • Good Customer’s Impression on Optimizer for NSN ANR method giving a quick successful handover in the field during the drive test For internal use LTE CLT Sharing Session_Indonesia / Ver. 1.0 / Rudi Wijaya 58

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Thank You… Rudi Wijaya LTE eNB CLT APAC

Nokia Siemens Networks Nokia Siemens Networks Jakarta – INDONESIA

+62 812 1083902 [email protected]

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