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UMTS / HSDPA connect issue.

  1. #1
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    Default UMTS / HSDPA connect issue.

    Hi All,

    I've been using BSNL's 3g usb modem (teracom 3.6 mbps)
    I just came back from a trip to north where i was using the usim on my android phone to access internet.
    Earlier my usb modem connected via UMTS which gave me speeds of 250+ kpbs.
    Since i have come back, it has started connecting via HSDPA which is giving me speeds of only 150-200kbps

    Before connecting to internet the connection software shows UMTS.
    When I click on connect and it connects to Internet, it shows HSDPA(with a yellow light). whereas earlier it used to show UMTS with a green light.
    (Please check screen shots)

    I'd appreciate any help on this issue.

    Thanks in advance.

  2. #2
    acc1444
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    Quote Originally Posted by j_arpit003 View Post
    Hi All,

    I've been using BSNL's 3g usb modem (teracom 3.6 mbps)
    I just came back from a trip to north where i was using the usim on my android phone to access internet.
    Earlier my usb modem connected via UMTS which gave me speeds of 250+ kpbs.
    Since i have come back, it has started connecting via HSDPA which is giving me speeds of only 150-200kbps

    Before connecting to internet the connection software shows UMTS.
    When I click on connect and it connects to Internet, it shows HSDPA(with a yellow light). whereas earlier it used to show UMTS with a green light.
    (Please check screen shots)

    I'd appreciate any help on this issue.

    Thanks in advance.

    I understand problem but I do not know what is happening with you. In both condition, internet is working fine then what do you want?

    I have read about BSNL network technology. I do not remember where I have read. BSNL is updating their network with UMTS.....

  3. #3
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    hey thanks for the reply...
    Both the conditions internet is working but now with HSDPA it is very slow..
    eariler i could watch video of any length on youtube without having to wait for it to buffer.
    now i have to pause it buffer.
    If this problem is from BSNL side, there very little we can do abt it (apart from hoping that they fix it soon)

  4. #4
    Silver Member sumanth's Avatar
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    Connects on HSPA for me with decent speeds. Never got connected on UMTS.

    Any idea anybody on these different categories of connection ?

    Heres my speed :


  5. #5
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    awesome what data card u are using and what software is it

  6. #6
    Silver Member sumanth's Avatar
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    Quote Originally Posted by deepak_raam View Post
    awesome what data card u are using and what software is it
    Huawei E1750. The software that came with the card.

  7. #7
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    Quote Originally Posted by deepak_raam View Post
    awesome what data card u are using and what software is it
    The software is mobile partner which comes from huawei and can be used with any huawei modems.

  8. #8
    Silver Member sumanth's Avatar
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    Any idea anybody about the UMTS and HSPA issue raised by j_arpit003 ?

  9. #9
    Silver Member ramli7's Avatar
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    Quote Originally Posted by sumanthgutta View Post
    Any idea anybody about the UMTS and HSPA issue raised by j_arpit003 ?
    Pl refer the 1G to 4G standards table given below.

    2G standard starts with GSM. Then various improved categories are added like Cdma one, GPRS, EDGE, CDMA 2000 1x RTT etc as 2.5 / 2.75G ...

    Hence Mobile devices are showing 2G or GSM as connectivity standard, depending upon the device and SW used.

    Similarly 3G standard starts with UMTS - WCDMA. Then follows with 1x EV-DO (Rel 0 ), HSDPA, HSUPA, HSPA+, LTE, EV-DO Rev A, EV-DO Rev B, WiMAX etc as 3.5, 3.75, 3.9G....

    Hence 3G devices initially shows as 3G in some Sierra cards or UMTS in some Teracom cards or WCDMA in some Huawei cards ( Mobile partner ) depending upon the HW / SW.

    Then after connecting and recognising the actual category of 3G, it shows as HSDPA or HSPA (HSD+HSUPA)







    Source : Wikipedia. More details ......

    W-CDMA (UMTS) - Wikipedia, the free encyclopedia


    __________________________________________________ ____________________________________________



    In the Sierra's interface, 2G and 3G header and HSPA in the botton can be seen. Since it is in 3G mode 2G is greyed out.....







    So, not to worry about changing to UMTS to HSDPA or WCDMA to HSPA.

    As I said in other places, you can confirm your connected speed, in MDMA.

    Now I hope, sumanthgutta is relaxed. ( sorry for the delayed reply. I need to take little care to mention so many categories here without slip ? )

  10. #10
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    Thumbs up

    To add to that most of the modems would have indicators to show what speed and network they are running at.The color of the led or the status of the led would give the details, it can be blinking or solid glowing.

  11. #11
    Platinum Member panchabhut's Avatar
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    Quote Originally Posted by ramli7 View Post
    Pl refer the 1G to 4G standards table given below.

    2G standard starts with GSM. Then various improved categories are added like Cdma one, GPRS, EDGE, CDMA 2000 1x RTT etc as 2.5 / 2.75G ...

    Hence Mobile devices are showing 2G or GSM as connectivity standard, depending upon the device and SW used.

    Similarly 3G standard starts with UMTS - WCDMA. Then follows with 1x EV-DO (Rel 0 ), HSDPA, HSUPA, HSPA+, LTE, EV-DO Rev A, EV-DO Rev B, WiMAX etc as 3.5, 3.75, 3.9G....

    Hence 3G devices initially shows as 3G in some Sierra cards or UMTS in some Teracom cards or WCDMA in some Huawei cards ( Mobile partner ) depending upon the HW / SW.

    Then after connecting and recognising the actual category of 3G, it shows as HSDPA or HSPA (HSD+HSUPA)

    I think you got a little confused.

    GSM, CDMA and WiMax are different technologies. GSM is pure 2G. CDMA voice part was always 3G, the data part initially was 2.5G and then moved to 3G. They is expected to converge into LTE.

    GSM > GPRS > EDGE > WCDMA > HSDPA > HSUPA > HSPA > LTE
    CDMA 1xRTT > CDMA EVDO > CDMA EVDO Rev A > CDMA EVDO Rev B > LTE
    Earth, Wind, Fire, Water, Consciousness.

  12. #12
    Silver Member ramli7's Avatar
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    I am not confused. Am clear about what I said.

    I am talking about 2G and 3G differentiation and clarified the display change from UMTS / WCDMA to HSPA asked by sumanthgutta and j_arpit003.

    GSM to LTE is covered both in 2G and 3G as well.

    Similarly CDMA 1xRTT to CDMA Rev.B also covered both in 2G and 3G as well.

    This can be clarified in the above table ( Wikipedia ).

    You said EV-DO voice part ( EV-DO Rev.A ) was always 3G. I have also said it is 3G, ( and no where denied it ) hence shown it in 3G standards i.e 4th para.

    I have grouped them in 2G, 2.5G and 2.75G in one part and 3G, 3.5G, 3.75G and 3.75G in another. That's all.

  13. #13
    Junior Member Gaurav Chaudhary's Avatar
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    I would like to add to more things to what Panchabhut said:
    1. LTE is not backward compatible. Which means LTE devices won't work with 3G network like our 3G data cards can work with GSM bands. But its not a big deal cause it would take another 7-8 years for India to reach LTE.
    2. Qualcomm has stated that it is no longer working on CDMA technology and they are going for LTE which means they won't be making anything related to Rev. B. For those of you who don't know, Qualcomm develops the network chips that we use in our data cards. All our data cards, no matter which model, i.e. Huawei, ZTE, Sierra, etc. all use Qualcomm chips in them. What I mean to say is that Rev. B is screwed. No more upgrades for EV-DO.

    @Panchubhut: They don't converge to LTE, rather they evolve to LTE. It is not using CDM or TDM, it is using TDD and FDD.

  14. #14
    Platinum Member panchabhut's Avatar
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    Quote Originally Posted by Gaurav Chaudhary View Post
    1. LTE is not backward compatible. Which means LTE devices won't work with 3G network like our 3G data cards can work with GSM bands. But its not a big deal cause it would take another 7-8 years for India to reach LTE.
    Mukesh Ambani controlled Reliance Infotel already has All India BWA licence. RIL has already indicated that they would use LTE technology for its network in partnership with Qualcom. The commercial launch is expected in 3rd or 4th quarter of 2011.

    There are also rumours that RIL has invested in Norton Ink to develop an android or JAVA based LTE Tablet for less than 10K that would be offered by Reliance Infotel.

    @Panchubhut: They don't converge to LTE, rather they evolve to LTE. It is not using CDM or TDM, it is using TDD and FDD.
    Agree
    Earth, Wind, Fire, Water, Consciousness.

  15. #15
    Junior Member Gaurav Chaudhary's Avatar
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    Quote Originally Posted by panchabhut View Post
    Mukesh Ambani controlled Reliance Infotel already has All India BWA licence. RIL has already indicated that they would use LTE technology for its network in partnership with Qualcom. The commercial launch is expected in 3rd or 4th quarter of 2011.

    There are also rumours that RIL has invested in Norton Ink to develop an android or JAVA based LTE Tablet for less than 10K that would be offered by Reliance Infotel.
    I won't believe them at this time. If I remember correctly then India was never supposed to get 3G at all. Back in 2007, these telecom giants were talking that they would directly go from 2G to 4G and after three years, what we got, India heading for 3G and still BSNL and MTNL opted for Category 6 when they could have directly started from Category 8 of HSDPA.
    I would say right now its beneficial for us that Relaince or any other private telecom company don't shift to LTE. We all know that there plan won't be affordable and even if all other telecom companies plan for LTE then what was the point of buying these data cards which won't work in LTE. As LTE is itself in development and is not fully operational all over the world, I suppose that it won't and shouldn't reach India soon enough.
    If they want to go for new technology then go for WiBro(real one, not like Tikona) or HIPERMAN.
    It would be better for us if all telecom companies should focus on developing their 3G spectrum rather than moving for new technology.
    Specially our state owned telecom operators who are sucking big times. VeriZon is providing such a great EV-DO network that even if you go to remote places, you will get 3 bar signal and here EV-DO doesn't work properly even near the tower. Quality and quantity should go hand in hand.

  16. #16
    Platinum Member panchabhut's Avatar
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    Before RIL's entry into Telecom in 2003 (through Reliance Infocom, later named Reliance Communications), cellphone was rich people's toy with airtime charges of Rs.10-12 per min and roaming rates of Rs.60 per min.
    Reliance Infocom changed the whole game and brought mobile to the hands of common man. The competition had no other option but to follow.

    R-Com was Mukesh Ambani's pet project. But for whatever reason, after the split, R-Com went to Anil Ambani and things came to a standstill.

    So we could be in for a new surprise with Mukesh Ambani's second venture into telecom through Reliance Infotel.
    Earth, Wind, Fire, Water, Consciousness.

  17. #17
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    boss.... hspda is 3.75g network and umts is just 3g network. in 3g u may get max. file download speed of 40-45kbps. but in hspda under 3.5G (hspda 3.5 G 3.6 mbps ) network u can download a file with max. speed of 200kbps. and in 3.75(hspda+ 7.2mbps) u can down at a speed doubler than 3.5g network.

    u will get good download speed if the signal strength is good and if the network is HSPDA and not UMTS.
    As usual BSNL is cheating its own customers by just introducing a new system and not even takes care to upgrade it . And paving way for other private operators to thrive.
    See.. Reliance Tata and MTs are advertising on mobile broadband + networks.. what is that service.? nobody cares on it.. BSNl too have that service. just like 3g they got that service first and they failed to advertise and built infrastructure to promote it.
    network name is evdo..
    just see the difference..
    bsnl evdo (mobile broadband) unlimited- just 750/month
    tata photon+ evdo - 15gb 1500/month
    reliance mobile broadband + -evdo - 15Gb - 1500/month
    HOW MANY KNOW ABOUT THIS FRAUD THESE NETWORK ARE DOING?
    WHY BSNL DIDNT ADVERTISE ON THIS EVDO?

    same is on 3G. they got 3g spectrum first and they didnt built good towers or infrastructure to take forward.
    InDIRECTLY THEY ARE ALLOWING THE OTHER PRIVATE OPERATORS TO GROW..
    CHECK ON THE OTHER 3G OPERATORS SITES. THEY DONT EVEN OFFER UNLIMITED PLANS. BUT THEY OFFER GOOD SPEED.
    BUT BSNL HAVE UNLIMITED PLANS+POOR SIGNAL STRENGTH+ POOR COVERAGE

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