Major Difference between 2G and 3G

[dilip]

Main advantage: spectrum efficiency (same for 3G to 4G)

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

[rishi]

[QUOTE=arban;106239]Hi Guys,
major difference is bandwidth which carries veery large information and it uses coding techniqiues mostly..

[aamirmehmoodkhan]

Can Any body share some documents??

[asdf]

Here is a document on 2G and 3G cellular networks and their evolution and comparison:

http://www.********.com/web/Business...paper_0608.pdf

[ntack1986]

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]

thanx for info. guyz

cheers

[J'tash]

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]

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]

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]

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.