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arban
2010-11-19, 02:17 AM
Hi Guys,

Maybe you can share what is the major difference between this two technologies. You can share anything that cross your mind.

Let me start first.

1) Difference frequency band. 2G occupy 900MHz and 1800 MHz.while 3G 2100 MHz

2) Signalling, Interface and Architecture difference

I know there are plenty out there, but just want to know what cross your mind when somebody from non-technical background ask this question.:eek:

haq_enam
2010-11-19, 04:30 AM
Hi Guys,

Maybe you can share what is the major difference between this two technologies. You can share anything that cross your mind.

Let me start first.

1) Difference frequency band. 2G occupy 900MHz and 1800 MHz.while 3G 2100 MHz

2) Signalling, Interface and Architecture difference

I know there are plenty out there, but just want to know what cross your mind when somebody from non-technical background ask this question.:eek:


Data services.....2G is mainly voice data ..3G like R99,HSDPA,HSPA+ and LTE....data services

sonerss
2010-11-19, 05:11 PM
Also Bandwidth

GSM has 200 kHz
WCDMA has 5000khz


Data services.....2G is mainly voice data ..3G like R99,HSDPA,HSPA+ and LTE....data services

sonerss
2010-11-19, 05:14 PM
Fast power control

2G has 2Hz
3G has 1500Hz


Hi Guys,

Maybe you can share what is the major difference between this two technologies. You can share anything that cross your mind.

Let me start first.

1) Difference frequency band. 2G occupy 900MHz and 1800 MHz.while 3G 2100 MHz

2) Signalling, Interface and Architecture difference

I know there are plenty out there, but just want to know what cross your mind when somebody from non-technical background ask this question.:eek:

arban
2010-11-20, 02:50 PM
Hi Guys,

Maybe you can share what is the major difference between this two technologies. You can share anything that cross your mind.

Let me start first.

1) Difference frequency band. 2G occupy 900MHz and 1800 MHz.while 3G 2100 MHz

2) Signalling, Interface and Architecture difference

I know there are plenty out there, but just want to know what cross your mind when somebody from non-technical background ask this question.:eek:

3G has hard hand over, soft hand over, and softer handover

2G only has hard hand over

plannerguy
2010-11-20, 09:38 PM
Hi

let me share my little knowledge

1)3G came as data requirment came more or requirment over air interface and mobility came strong .
2)with 200Khz in 2G and with Modulation techinques it is not possible to cop up with Higher data rates.


Regards:(
Plannerguy

luganomu
2010-11-20, 10:55 PM
The penentration point of view:
2g cover lager footprint while 3g cover less footprint this is due to their operation frequency

plannerguy
2010-11-20, 11:15 PM
Hi luganomu

But there is a catch ie the RX senstivity of BTS in GSM 2G is -110 and in case of 3G its -126 also the RX sensivity or 2G GSm phones according GSM spec of rel 3gpp is -102 db while 3G is -114 db

So footprint cannot be just assumed on frequency, also you can operate 3G on 900 band .

But the service provdided at longer distance may vary due to Power ! ie which is a main limiting factor in 3G.


Regards:)
Plannegruy

firstmaxim
2010-11-21, 02:42 AM
Hi Guys,

Maybe you can share what is the major difference between this two technologies. You can share anything that cross your mind.

Let me start first.

1) Difference frequency band. 2G occupy 900MHz and 1800 MHz.while 3G 2100 MHz

2) Signalling, Interface and Architecture difference

I know there are plenty out there, but just want to know what cross your mind when somebody from non-technical background ask this question.:eek:

3G employs a fat pipe, which improves delivery to the user. Also, a wideband channel is more resilient to fading. Also, 3G allows us BW-Power trade off. Hence, it is possible to receive signal levels lower than the ambient noise (interference).

telwind
2010-11-21, 02:58 AM
- 3G provides high speed packet data rate in several Mbps
- 3G uses wideband vs narrow band of 2g gsm
- 3G use the spread spectrum vs gsm 2g tdma

dilip
2010-11-23, 01:36 AM
Main advantage: spectrum efficiency (same for 3G to 4G)

Main disadvantage: range (same for 1G to 2G)

rishi
2010-11-23, 03:17 AM
[QUOTE=arban;106239]Hi Guys,
major difference is bandwidth which carries veery large information and it uses coding techniqiues mostly..

aamirmehmoodkhan
2011-01-10, 03:11 AM
Can Any body share some documents??

asdf
2011-01-11, 04:58 AM
Here is a document on 2G and 3G cellular networks and their evolution and comparison:

[Only registered and activated users can see links]

ntack1986
2011-01-12, 10:29 PM
In your question, i think u mentioned to GSM (2G) and WCDMA (3G). Somebody from non-technical background can distinguish them as:
- 2G: supports voice and low data rate services (CS services)
- 3G: suppots many kinds of services from Voice, video call, video streaming... to high speed services...

mustafapkpk
2011-01-13, 08:58 PM
thanx for info. guyz

cheers

J'tash
2011-02-11, 07:58 PM
3G has dynamic cell breathing which allowed coverage to shrink (Smaller) depends on the user numbers & it will correlate with its EC/NO. While 2G coverage is Fixed, nomather how many user were utillized at the same time.

Andryawan
2011-02-12, 04:44 AM
Here are 2G(GSM) vs 3G(WCDMA) comparison :

1. Access Methods
GSM: TDMA
WCDMA: CDMA

2. Bandwidth per Carrier
GSM: 200 khz
WCDMA: 5 Mhz

3. Frequency Reused Factor
GSM: 7
WCDMA: 1

4. Packet Data
GSM: Timeslot based scheduling (GPRS)
WCDMA: Load based on Packet Scheduling

5. Frequency Diversity
GSM: Frequency Hopping
WCDMA: Multipath Diversity dengan Rake Receiver

6. Frequency Power Control
GSM: <2 Hz
WCDMA: 1500 Hz

7. Downlink Transmit Diversity
GSM: Not Standarized
WCDMA: Standarized

hopefully it will help you

adeolur
2011-02-12, 11:16 AM
nice thread. if we have to talk about the network architecture, the RNC in 3G will take the place of a BSC in 2G. 2G is solely circuit switched but 3G tends to packet switched network

firstmaxim
2011-02-13, 01:53 AM
Here are 2G(GSM) vs 3G(WCDMA) comparison :

1. Access Methods
GSM: TDMA
WCDMA: CDMA

2. Bandwidth per Carrier
GSM: 200 khz
WCDMA: 5 Mhz

3. Frequency Reused Factor
GSM: 7
WCDMA: 1

4. Packet Data
GSM: Timeslot based scheduling (GPRS)
WCDMA: Load based on Packet Scheduling

5. Frequency Diversity
GSM: Frequency Hopping
WCDMA: Multipath Diversity dengan Rake Receiver

6. Frequency Power Control
GSM: <2 Hz
WCDMA: 1500 Hz

7. Downlink Transmit Diversity
GSM: Not Standarized
WCDMA: Standarized

hopefully it will help you
Nice comparison. Just to add:
- 3G supports simultaneous multiple sessions
- 3G exploits a wideband channel, whose signal BW is greater than the coherent channel BW. So, you have more resilience to frequency selective fading in 3G.
- The fatpipe of 3G offers better/varied QoS.

srilasitha
2011-02-15, 03:06 AM
GSM can have multiple sessions

for Ex : DTM