IET
Decrease font size
Increase font size
Topic Title: GSM RF PLANNING
Topic Summary:
Created On: 14 March 2005 10:37 AM
Status: Read Only
Linear : Threading : Single : Branch
1 2 3 4 5 6 Next Last unread
Search Topic Search Topic
Topic Tools Topic Tools
View similar topics View similar topics
View topic in raw text format. Print this topic.
 14 March 2005 10:37 AM
User is offline View Users Profile Print this message



bagouri

Posts: 17
Joined: 19 June 2002

HI
I am a GSM RF planner in an Ericsson operator , I am new to GSM although I have a good radio background, but I think GSM is totaly new for me , I am looking for a documment/book that can provide me with a soild background,that can help me with my career. Please recommend a good reference for me so I can find professional and practical info about GSM: cell planning propogation models,(Teletrafic/capacity planning, frequency planning , site prediction ,link budgets,site surveys,dimensioning, introducing GPRS ,.., for both indoor and out door.............. everything from Ato Z.
 14 March 2005 11:10 AM
User is offline View Users Profile Print this message



jcolquhoun

Posts: 487
Joined: 21 September 2001

Hi Bagouri

You might want to have a look at the IEEs library, might be easier and cheeper than buying a book or books that might not answer all the questions that you have. I am not sure where in the world you are but you might want to look at 3G rather than trying to concentrate on GSM.

Regards

-------------------------
Eur Ing John Colquhoun CEng MIET
Si Je Puis
Clarior Hinc Honos
Operations Manager - Telecommunications (Scotland) <img src="/forums/forum/i/expressions/face-icon-small-wink.gif" border="0">
 15 March 2005 04:02 AM
User is offline View Users Profile Print this message



alanj

Posts: 10
Joined: 20 April 2002

I recently wrote a short note on this for the satellite role in 3G.
Although the cell design as at a supeficial level, you may find some aspects helpful.

Regards aj C Eng MIEE
 15 March 2005 04:04 AM
User is offline View Users Profile Print this message



alanj

Posts: 10
Joined: 20 April 2002

3G NETWORK RADIO INTERFACES
There are five types of 3G radio interfaces specified under ITU Recommendation ITU-R M.1457.
Some 2.5G systems will be able to deliver 3G services, so that it will be difficult for users to tell the difference. (GSM GPRS, IS-95 and CDMA 2000 1X)

? IMT-2000 CDMA Direct Spread, also known as UTRA FDD including WCDMA in Japan, ARIB / DoCoMo recommendation. UMTS is developed by 3GPP.

? IMT-2000 CDMA Multi-carrier, also known as Cdma2000 (3X) developed by 3GPP2. IMT-2000 CDMA2000 includes 1X components, like cdma2000 1X EV-DO.

? IMT-2000 CDMA TDD, also known as UTRA TDD and TD-SCDMA. TD-SCDMA is developed in China and supported by TD-SCDMA Forum

? IMT-2000 TDMA Single Carrier, also known as UWC-136 (Edge) supported by UWCC

? IMT-2000 DECT supported by DECT Forum.

3G NETWORK PLANNING
The cost of 3G roll-out is heavily dependant upon the number of BTS?s and BSC?s.
The number of BTS?s is dependant on the overall network coverage required, divided by the cell size. The cell size is determined by the link budget and capacity estimations.
The number of BTS?s and BSC?s are minimized by the turn-key network providers, in order to generate the lowest bid-price to the operator.
In addition to the calculated number of BTS?s required, a factor of say 10% is added to provide quality cells (CEO?s residence, Golf Club etc), and to fix mobile reception holes, and tunnels etc.

The location of BTS?s and BCS?s are also controlled by the availability of friendly properties to physically locate the stations. The use of heritage sites has obvious advantages, in acquiring permission and planning consent from government and local authorities.

UMTS FREQUENCIES
Frequency Format Channel spacing Raster
kHz Comment
1900 to 1920 MHz Time Division Duplex (TDD, TD/CDMA) Unpaired 5MHz 200 Tx & Rx not separated in frequency
2010 to 2025 MHz
1920 to 1980 MHz Frequency Division Duplex (FDD,
W-CDMA) Paired uplink and downlink, 5MHz 200 An operator needs 3 to 4channels (2*15 or 2*20MHz) to be able to build a high speed, high capacity network.
1980 to 2010 MHz Satellite uplink and downlink
2170 to 2200 MHz


3G NETWORK LINK BUDGET
A typical reverse (uplink, from handset to BTS) WCDMA link budget is provided in Appendix 4, interference from other mobiles is usually the limiting factor in CDMA systems. The link budget determines the cell size and the number of BTS?s required. The link budget includes the interference margin which is the increased noise level due to other users in the cell.
Hence increasing the cell load, will require the coverage area to become smaller.
The UMTS modulation, data rates, air interfaces and data compression are given in Appendix 5.

3G NETWORK CAPACITY
Network capacity is estimated in two parts, firstly a single transceiver and a single site capacity is estimated. Depending on chosen Eb/No?s etc, the planned transceiver capacity is typically from 400kbps to 700kbps per transceiver. The second part is to estimate how many users each cell can support. A lot of data is required for comprehensive network dimensioning, including number of subscribers and growth estimates, traffic/user/busy hour geographic segment and required throughput including service mixes in geographic segments.

A simplified downlink capacity may be as follows.
During a busy hour an average user downloads 10Mbps with 384kbps, 2Mbps with 144kbps and makes one 60 second voice call. Data is transmitted at 1.1 times, because of network conditions.

Service Rate Average Rate
(10 Mbps/3600 sec) x 1.1 3.06 kbps
(2 Mbps/3600 sec) x 1.1 0.61 kbps
(60 sec/12.2 kbps)/3600 0.2 kbps
Total 3.87 kbps / user / busy hour

Number of users (cell capacity 500 kbps) 129

The above examples quickly serve to show that cell bandwidth is a premium, and ways of alleviating congestion due to increased rich multimedia and video broadcasts is particularly interesting to the network operator.


APPENDIX 4
LINK BUDGET

Transmit
Mobile max power = 0.125 watt 21 dBm
Body Loss - Antenna gain 2 dBm
EIRP 19 dBm

Receive
BTS noise density -168 dBm/Hz
Rx noise power -102.2 dBm
Interference Margin 3 dBm/Hz
Receive Interference Power -102.2 dBm
Noise and Interference Power -99.2 dBm
Processing Gain, 144k voice 14.3 dB
Required Eb/No for speech 5 dB
Antenna gain 19 dB
Cable and connector losses 2 dB
Fast fading margin 4 dB
Receive sensitivity -121.4 dBm

Total available path loss 140.4 dB

Dimensioning
Log normal fading margin 7 dB
Indoor/in vehicle loss 0 dB
Soft handover gain 3 dB

Call edge target propagation loss 136.4 dB

Okamura-Hata cell range 0.94 km

Site hexagon coverage area 2.3 km^2
Coverage overlap for handovers 20 %
Required Suburban coverage area 200 km^2
Required Suburban coverage sites 105


APPENDIX 5
3G NETWORK LINK PARAMETERS
UMTS WCDMA modulation is Quadrature Phase Shift Keying (QPSK) with root-raised cosine pulse shaping filters (roll off = 0.22). 2G CDMA systems have a bandwidth of 1.25MHz while new 3G WCDMA systems have a bandwidth of 5MHz.

UMTS AIR INTERFACE LOGICAL CHANNELS
Broadcast Control Channel (BCCH)
Paging Control Channel (PCCH)
Dedicated Control Channel (DCCH)
Common Control Channel (CCCH)
Dedicated Traffic Channel (DTCH)
Common Traffic Channel (CTCH)

UMTS DATA RATES
2.048Mbps for pico-cell (and micro-cell) applications.
384kbps for medium size cells. (micro and small macro cells)
144kbps and 64kbps for large cell applications. (Large macro cells)
14.4kbps for continuous low speed data applications in very large cells.
12.2kbps for speech (4.75kbps - 12.2kbps)
9.6kbps globally (satellite)
 15 March 2005 09:35 AM
User is offline View Users Profile Print this message



jcolquhoun

Posts: 487
Joined: 21 September 2001

Hi alanj

I was trying to point bagouri in the right direction because in my experience the act of finding the information is usually the best way of learning it.

For example a book that we have been using for 3G reference is;

Radio Network Planning and Optimisation for UMTS, published by WILEY
ISBN 0-471-48653-1
Wiley Comms Page

Chapters 2 and 4 are recommended.

Also if you are interested in 3G, another source of information is the 3GPP web site 3GPP home page

Other good reference books (GSM etc) are;

Radio and RF Engineering Pocket Book, published by Newnes
ISBN 0-7506-5608-5

Telecommunications Pocket Book, published by Newnes
ISBN 0-7506-5298-5

Regards

-------------------------
Eur Ing John Colquhoun CEng MIET
Si Je Puis
Clarior Hinc Honos
Operations Manager - Telecommunications (Scotland) <img src="/forums/forum/i/expressions/face-icon-small-wink.gif" border="0">
 16 March 2005 01:12 AM
User is offline View Users Profile Print this message



alanj

Posts: 10
Joined: 20 April 2002

Dear John

Many thanks for your response.
The forum is a very good opportuntiy for disemination of information and could be a real benefit to our proffession through the IEE.

I would like to see the forum move to a higher level of discussion, not remain in the mure.

Your response was certainly offering more support and a step in the right direction.

I hope you and I, can both offer this level of suport again in the future.


Regards

aj CEng MIEE
 23 March 2005 09:32 AM
User is offline View Users Profile Print this message



bagouri

Posts: 17
Joined: 19 June 2002

Dears Mr. John and Mr.Alanj

Many thanks for your kind and comprehensive reply for my question
I work for an operator in Sudan, we are using GSM900 and GSM1800, and will shortly introduce GPRS, I think I need to understand GSM first then snowball into GPRS or 3G.,I have an MSc degree from Portsmouth University and I think my radio background is not bad but I still need to match it with GSM, thats what I am looking for and I will be happy if you can help me with this.
 29 August 2005 12:44 PM
User is offline View Users Profile Print this message



deleted_rizwanbhawra

Posts: 1
Joined: 29 August 2005

quote:

Originally posted by: bagouri
HI

I am a GSM RF planner in an Ericsson operator , I am new to GSM although I have a good radio background, but I think GSM is totaly new for me , I am looking for a documment/book that can provide me with a soild background,that can help me with my career. Please recommend a good reference for me so I can find professional and practical info about GSM: cell planning propogation models,(Teletrafic/capacity planning, frequency planning , site prediction ,link budgets,site surveys,dimensioning, introducing GPRS ,.., for both indoor and out door.............. everything from Ato Z.
 14 October 2005 02:22 PM
User is offline View Users Profile Print this message



deleted_tony123

Posts: 2
Joined: 14 October 2005

hii this is tony
i shall give you all the latest training documents on GPRS planning& Rf optimization by motorola & siemens if you do me a favour this is very urgent##
i got seleted by Ericsson my job profile is post logfile documentation n planning pls do me a favor in need a log file (TEMS 3.2,GSM) to compose macros
pls upload log file (.log) at URL:

Link removed
Procedure: logon to the site , browse the file, then upload the file (max 150MB) @ the end of the upload a URL(location id) to which uploaded is displayed pls do forward this location id to my email address casp_raju@yahoo.com

with gratitude

Tony
 23 October 2005 04:01 PM
User is offline View Users Profile Print this message



deleted_onlyinam

Posts: 3
Joined: 20 August 2004


HI

I am a GSM RF planner , I am looking for a documment/book that can provide me with a soild background,that can help me with my career. Please recommend a good reference for me so I can find professional and practical info about GSM: cell planning propogation models,(Teletrafic/capacity planning, frequency planning , site prediction ,link budgets,site surveys,dimensioning, introducing GPRS ,.., for both indoor and out door

Regards,
inam
 26 October 2005 11:10 AM
User is offline View Users Profile Print this message



deleted_onlyinam

Posts: 3
Joined: 20 August 2004

Dear tony, can u please give me some documents related to GSM Cell planning at inam_075@yahoo.com

Thanks in advance,
-inam
 26 October 2005 12:17 PM
User is offline View Users Profile Print this message



jcolquhoun

Posts: 487
Joined: 21 September 2001

Dont want to sound cheeky but if you are already a GSM RF Planner why do you need such fundamental information?

I find that Google is a good source of information.

Regards

-------------------------
Eur Ing John Colquhoun CEng MIET
Si Je Puis
Clarior Hinc Honos
Operations Manager - Telecommunications (Scotland) <img src="/forums/forum/i/expressions/face-icon-small-wink.gif" border="0">
 26 October 2005 02:51 PM
User is offline View Users Profile Print this message



deleted_onlyinam

Posts: 3
Joined: 20 August 2004

Hi, jcolquhoun
Thanks for ur concern. I am actually new to this field. May b as new as just joined one month ago. Yes google is good source but that does't let u narrow ur search. if u have some documents, I will be thankful to u if u send them at

inam_075@yahoo.com

regards,
-inam
 27 October 2005 08:55 AM
User is offline View Users Profile Print this message



jcolquhoun

Posts: 487
Joined: 21 September 2001

The documents that I have are all Company Confidential.

If you have a look at the books that I detailed earlier in this thread, they may help you. Otherwise look at the Nokia Technical Web Page

https://online.nokia.com (since its a secure server web page you have to type this into your web browser)

You will have to register for this one.

Also try the www.3gpp.com or GSM World web pages.

Does your company not have a detailed training program for new starts?

Regards

-------------------------
Eur Ing John Colquhoun CEng MIET
Si Je Puis
Clarior Hinc Honos
Operations Manager - Telecommunications (Scotland) <img src="/forums/forum/i/expressions/face-icon-small-wink.gif" border="0">

Edited: 27 October 2005 at 08:58 AM by jcolquhoun
 02 January 2006 07:58 AM
User is offline View Users Profile Print this message



deleted_mrizalw

Posts: 1
Joined: 02 January 2006

hi tony,

do you still need that drive test file you asked?

i have some files if still need it
 13 January 2006 03:08 AM
User is offline View Users Profile Print this message



deleted_kakulavaram

Posts: 1
Joined: 13 January 2006

quote:

Originally posted by: mrizalw
hi tony,

do you still need that drive test file you asked?

i have some files if still need it


hi every one i am ram i have joined this forum recentlyy
 20 February 2006 02:55 PM
User is offline View Users Profile Print this message



deleted_bikasksingh

Posts: 1
Joined: 20 February 2006

hi every body
i just want to know about some book on RF drive test & RF Planning.
plz help me.
Bikas k Singh
RF Engineer
Royal Telenet Pvt Ltd
New Delhi
 26 February 2006 03:07 PM
User is offline View Users Profile Print this message



deleted_kella

Posts: 1
Joined: 26 February 2006

hello tony, can u please give me some documents related to GPRS planning& Rf optimization by motorola & siemens at jdkella@yahoo.com?

Thanks in advance
Kella
 01 March 2006 09:37 AM
User is offline View Users Profile Print this message



deleted_shoaibalikhan

Posts: 1
Joined: 01 March 2006

hellio Everybody,
Can anybo send me some documents regarding RF Planning of GSM Networks , i think knowledge sharing with each other will be helpful to everybody.

Thanks
please send me docs on shoaib.engr@gmail.com
 07 March 2006 06:40 PM
User is offline View Users Profile Print this message



deleted_amathew

Posts: 1
Joined: 07 March 2006

Hi
I am new eleectrical engineer in an construction field and there is plan to install gsm sites in UAE.My company recently quoted for a project and is trying to find out whether they can win the bid but they have not carefully planned to how much cost is needed to lay the foundations for gsm and also has not accounted for thenet coverage area for the site. We( our construction engineers) are providing a stable foundations for the gsm sites. To be specific, is it important to check the how much area gsm sites will cover while doing our cost analysis report.

please email me informations to agmathew@fastmail.fm

thanks and regards
arun mathew
IET » Communications engineering » GSM RF PLANNING

1 2 3 4 5 6 Next Last unread
Topic Tools Topic Tools
Statistics

See Also:



FuseTalk Standard Edition v3.2 - © 1999-2014 FuseTalk Inc. All rights reserved.