Wimax

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Product Training – TELSIMA SSRef. 1050008100


TELSIMA SS IMPLEMENTATION

& TROUBLESHOOTING TRAINING

Data as on June,06 3Ver 01


StarMAX Subscriber Station

Introduction

RF Coverage

Pole Location Selection

Pole and Antenna Mounting

Cabling & Connector Preparation

Antenna Direction Selection



STARMAX 2150 Subscriber Station

StarMAX 2150 Subscriber Station is outdoor version, designed for full outdoor operation. StarMAX 2150 Subscriber Station comes with anintegrated antenna, which is located under the cover of the unit. Entire StarMAX 2150 Subscriber Station is enclosed in a sealed, weather proof casing, suitable for outdoor wall mounting or pole mounting.



Introduction StarMAX 2150 Subscriber Station

StarMAX 2150



RF Coverage

•Need to know what WiMAX network is planned for

Rooftop Coverage

Indoor Coverage

• How many Base Station are Visible (LOS or Near LOS) from the location ?

• Approximate distance from each BS Location

• Frequency of operation

• Targeted Throughput / Data rate



SS Visible from Single / Multiple Base Stations

Site K

Site A

SS Location

6Km

2.3Km

North

Obstruction

Site B

3Km



Pole Mount Location

GI Pipe of 42 mm OD to be used of 1500 mm length

To be installed along the walls of the terrace or building

Preferably on rooftop with no immediate obstruction for 200 m

Also can be located at window tops or along the outside walls if no

access to rooftop

Need not be at the highest possible height always

Should be located in an area accessible to the technician



Best Pole Mount / Antenna Location (Multipath Environment)

Refer to example above. Take the CINR & RSSI at all three possible locations.Compare RSSI and CINR at all the three locations.The location where best CINR is received, it should be finalized for installing pole and SS.



F1

F1

SSSS

SS ht increased-> signal from more than one BSRSSI<R1CINR<C1

SS getting signal from one BSRSSI (Receive signal strength Ind.)= R1CINR (Carrier to Interfernce+Noise Rejection Ratio)= C1

For SS more height is not always good

Site very far from SS location



SS Installed at Great Height is not always good

Customer Building Wimax Base Station

Subscriber Station

32 m

ete

r h

eig

ht8

0 m

ete

r heig

ht

•To achieve better link quality, place the Subscriber Station antenna at an optimum height.•When deciding the location of the Subscriber Station, take into account the location of the power outlet and your data equipment.



Pole & Antenna Description- Identifying the Components

StartMAX SS Antanna.dwg



Pole & Antenna Mounting

Step1: Secure the pipe to the parapet wall or lift room or any other

suitable place with “C” clamps. Make sure that pipe do not rotates in the C clamp.

Note that SS (Subscriber Station) can also be mounted on an

existing pipe.

To make sure that Antenna Base Bracket (ABB) orientation is right

for a given pole size and pole orientation, make a loose assembly of

all the parts of the bracket.

Once clear on what type of ABB orientation will be required tighten

the ABB to SS.

Grounding of the Pole Mount is must



Ethernet input

TO SS

Rotate this bracket by

90 Deg for Vertical pipe



Step2: Install the ABB as shown below.

Note that the ABB should be fixed after rotating by 90 degree compared to what is shown in the drawing.Precautions:

•The Elevation axis should be in parallel to the pole on which SS is to be mounted.

•The four bolts are of steel whereas the body of the enclosure is aluminium, a softer material. There is no threading on the bolt receptacle on the SS body. The bolts are to fixed by self-threading them.

•Ensure that bolts are aligned correctly or else the holes will get threaded unevenly. Use nut driver of proper size. Do not use spanner. Care needs to be taken to use the correct torque for tightening.

•Multiple removing and attaching brackets should be avoided, as this will damage the threads in the aluminium body.••There should not be any gap/play between bolt head and base bracket.



Connector Preparation and Cabling

StarMAX SS 2150 connects to PoE box with CAT5e cable with RJ45

connector on both the sides

The connectivity from PoE box to SS port is Straight through

Supported Cable Length is 100 meter

PoE box to Customer Premise Equipment connectivity is auto negotiate

mode

It is important to check the continuity of the cable before plugging it into

PoE and StarMAX SS

CAT5e cable should be free of any sharp Bends and Twists for better

performance



Installation Contd..

Grounding

Grounding of the Subscriber Station should be performed by following the steps:

Take M5x10 screw and a nut;

Fix the screw on the opening on the bottom of the Subscriber Station (next to the opening for the PoE cable)

Use a grounding cable no.10 (or 16 mm2)

Connecting the Equipment

Connect the Network Cable to RF+DC port on the PoE Module.

Connect the RJ-45 Network Cable to the RF port on the PoE Module.

Connect the other end of RJ-45 Network Cable to the RJ-45 port of your computer's Ethernet card or the adapter.

Connect the PoE Module to a standard electrical outlet.



SS 2150 Commissioning

SS Specifications

Check before Power ON

SS Config

SS Status



Functional Description

Networking device

StarMAX 2100 series Subscriber Stations operate in the bridging mode. Their

primary function is L2 packet forwarding between the WiMAX interface and the

network interface. Access control lists, which may be applied to both WiMAX and

network interface are controlled by the StarMAX NMS network management

system.

Physical layer implementation

StarMAX 2100 series Subscriber Stations support IEEE 802.16 - 2004 standards

compliant physical layer with 256 OFDM/TDM/TDMA TDD operation. Supported

bands are 2.5, 3.3 and 3.5 GHz. Supported frame lengths are 5 ms, 8 ms, 10 ms,

12,5 ms and 20 ms. Supported frame splits are from 70:30 to 20:80 (uplink versus

downlink). Supported bandwidths are 3 MHz, 3.5 MHz, 5 MHz, 6 MHz, 7 MHz 10

MHz. Channel bandwidth is settable is steps of 250 kHz. Part of the standard PHY

layer implementation is adaptive modulation support.



MAC layer implementationStarMAX 2100 series Subscriber Stations support IEEE 802.16 -2004 standards compliant mandatory MAC layer implementation with packet convergence sublayer and common part sublayer. This includes core MAC layer functionality with control of duplexing, framing, PDU formation and header/subheader insertion.

Security Sublayer implementationStarMAX Subscriber Stations support PKM - V1 protocol for network authentication/security. PKM - V1 is determined by the cryptographic suite, which consists of the set of supported algorithm for encryption, authentication and TEK encryption. The supported cryptographic suite is supported:

Functional Description contd…..



Authentication

TEK encryption

Quality of service

.

File system

SNMP management support

System software update

Functional Description contd…..



System SpecificationsWiMAX specification IEEE 802.16-2004

Adaptive modulation 64QAM ¾, 64QAM 2/3, 16QAM ¾,

16 QAM ½, QPSK ¾, QPSK ½, BPSK ½

Tx Power Maximum +20 dBm

Rx Sensitivity -100 dBm

Working Temperature -40 to +55*C

Antenna Gain 18 dBi gain outdoor antenna

Weight in Kgs 2.9

Classes of service BE, nrt-PS

Software upgrade Yes, software upgradable "over the air", Fail safe



Check Before Powering ON

Check the GND to NEUTRAL VOLTAGE in AC supply should be less than 1.5 Volt

Check that Network and RF cable are connected to PoE

as marked

Check the grounding of the SS unit



Power ON and System Connection

Power on the Subscriber Station

Install the Java JRE package if it is not installed in PC

Java 1.5 JRE for subscriber station EMS (Element Network Management)

(for free download of Java software http://www.java.com/en/download/index.jsp)

The default LAN IP of the SS is 192.168.1.1/24

Configure your computer to the static IP address: 192.168.1.2 with

subnet as 255.255.255.0 with 192.168.1.1 as gateway

Telnet the IP 192.168.1.1,

Login : root, password: telsimawl



Basic Parameters Configuration

Basic Parameters to be configured are

1. Spot Frequency (3.3, 3.5 GHz etc.)

2. Frequency BW (3, 7, 14 MHz etc.)

3. BS Connect Mode = Auto

4. NTP server IP

5. SNMP RO & RW Communities



Detailed Procedure for Antenna Alignment

Identify the nearest base station and if one is visible. Roughly align the antenna in the direction of this BTS.Power on the SS. Connect LCT to SS and monitor the RSSI.Before attempting horizontal alignment please loose bolt connecting antenna bracket (item# 1) with arm bracket (item# 5). Otherwise knurls on both the items will get damaged. After alignment this bolt is to be tightened.Keep the SS (Antenna) almost vertical and looking towards the rough direction of BTS. Move the Antenna slowly in horizontal plane, clock wise for at-least 45 degree from the initial position and mark the maximum RSSI. Do not stop even if design RSSI is achieved at some point. The RSSI may increase and finally start decreasing and become almost zero when the antenna is at 45 degree.Move the antenna slowly anti-clock wise, again noting the maximum RSSI and bring it back to original position.Move the antenna slowly clock wise, noting the maximum RSSI, till antenna is about 45 degree from the initial position.Bring the antenna to maximum RSSI position and tighten the bolt as described in point (iii).It is advisable to do 2/3 seeps of antenna and then lock antenna on maximum RSSI in horizontal plan.Now Vertical alignment is to be carried out. The procedure of vertical alignment is same as horizontal alignment. The sweep of antenna may be restricted to 15 degree up and 15 degree down from initial position.

Similarly before attempting vertical alignment loose bolt connecting arm bracket (item#5) with wall/pole bracket (item#10). Otherwise knurls on both the items will get damaged. After alignment this bolt is to be tightenedThe SS is to be locked to maximum RSSI.



The log at Seawind 11th floor

Telsima_ss#show bs-------------------------------------------------------------------------------------------

------

BS-Name SectorId Frequency Bandwidth Status DL-Cinr DL-Rssi DL-Fec

Ptx

-------------------------------------------------------------------------------------------------

bs1 00:00:00:00:00:B2 3337000 3000 OPER 29.81 -54.09 qam64-rs-cc-3/4

8.06

bs2 00:00:00:00:00:B1 3340000 3000 -NA- 24.95 -57.63 -NA--NA-

-------------------------------------------------------------------------------------------------

Actual SS Configuration



Telsima_ss#show running-configconfigure ip ftp username rootconfigure ip ftp password passwordconfigure user password root 6c684ee7e13a45ce6cconfigure user password support f85d86b51d5dafconfigure ntp server 128.250.36.2configure ntp enableconfigure ip address 192.168.1.1 255.255.255.0configure bs connect_mode autoconfigure bs connect bs1configure bs add 3337000 3000 bs1configure bs add 3340000 3000 bs2

Telsima_ss#show mac-address-tableFORWARDING TABLE ENTRIESUNKNOWN ADDRESSES broadcasted to all interfaces----------------------------------------------MAC ADDRESS INTERFACE----------------------------------------------0002739000f4 LOCAL



Telsima_ss#show versionSystem Software VersionKernel

version 2.0.3creation date Feb 23 2007, 11:35:10build machine HERCULES

Applicationversion 2.0.3creation date Fri Feb 23 12:02:07 CEST 2007build machine hercules.

System Hardware Version--------------------------------------------------------------------------------DEVICE | HARDWARE VERSION--------------------------------------------------------------------------------StarMAX 2100 Subscriber Station |--------------------------------------------------------------------------------



SS Status and Provisioning

A three way handshake enables the entry of SS in the network

Communication is between SS, BS and PS server described in the next slide



StarMAX SS StarMAX BS StarMAX PS DHCP

Register Req.

Register ACK

OPERATIONAL STATE

Authorization

1st Network Entry

Network Re-entry

DHCP REQ.

DHCP ACK with IP Add.

WAIT FOR PROVISION

CREATE SF, QOS

ACCESS LIST, RADIO SETTINGS, FUTURE

PROVISIONED, NOT PROV. , PROV. WITH

WARNINGS



Supported Modulation Schemes & Throughput analysis

13.09 Mbps

11.88 Mbps

8.73 Mbps

5.82 Mbps

4.37 Mbps

2.90 Mbps

2.18 Mbps

Max. Throughput(3.5MHz)

20QAM64 2/3

18.4QAM64 1/2

14.4QAM16 3/4

11.1QAM16 1/2

8.4QPSK 3/4

5.8QPSK 1/2

3.3BPSK

CINR Value (dB)Modulation Scheme



FEC code

(A higher CINR triggers the upgrade of the

FEC code)Hysteresis Margin

Protection Margin

Protection Margin

Protection Margin

Hysteresis Margin

(A lower CINR triggers

the downgrade of the FEC code)

Implementation CINR (BER=10-6)

CINR

BPSK 1/2 QPSK 1/2 QPSK 3/4

LINK ADAPTATION PARAMETRIZATION



2150 SS Troubleshooting

SS troubleshooting RF part

SS troubleshooting System Parts

Tools and Measurements



Check the Antenna location/position/ Alarms at BS

Is there some obstruction within 150m at BS?

Can be building, tower, hoardings etc

Check the RF parameters at different locations at

probable SS antenna location

RSSI, CINR, Sectors,

Modulation

Look for the antenna location at SS where only 1 sector

coverage is available with RSSI>-85, CINR>8

Observe for few min/hrs………………..

Any new Element added/SW upgrade in the network

Approach for looking at SS problem: RF Perspective



Approach for looking at SS problem: System Perspective









Tools & Measurements

Required Tools for Installing a StarMAX SS are

A screwdriver, a pair of tongs, a spanner, a pole

Ethernet cable (straight) for connecting the Station to your data equipment.

A PC that is configured with an ethernet card or an adapter

Microsoft Windows or other OS

In some cases a spectrum analyser may also be required

Throughput Measurement:

Using iperf



Thank YouContact : [email protected]

Wimax

Documents

ss location f1ss ss

pole mounting

technician data

subscriber stationstarmax

cinr rssi

c1 ss ht

site b data

bs rssi