ලංකාවේ HSDPA (Mobile Internet) මුලාව…

හැමෝටම තියන ගැටලුවක් තමයි මේ මෝබයිල් පුලුල් පරාස ඉන්ටර්නෙට් නොහොන්, Broadband HSDPA මේතර්ම් ගැටලු සහිත හා, මේ අය කියන 3.6mbps, 7.2mbps වේහයන් ලැබෙන්නේ නැත්තේ කියලා. ගොඩක් අයට මේගැන හරි වැටහීමක් නැති නිසා මේකියන Marketing tricks වලට රැවටෙනවා. මේවා විකුනන අයවත්, Marketing කරන අයවට් මේවා ගැන දනේ නෑ, මේක හරිම සරලව කියල දෙන්න කියලා තමයි මම මේ අද බලන්නේ.

මොකද මේ ගොඩක් HSDPA බාවිතාකරන අය කියනවා, මගේ එක slow, තව අය කියනවා මගෙ එක fast කියලා, මම මේ දැනුත් ටොරන්ට් බානවා කියයි 😀 ඇයි මේක මෙහම වෙන්නේ. ඇයි මේ service providers ලට කියන වේග දෙන්න බැරි. මොනාද මේ අය අපෙන් වසන් කරනේ කියන කරුන තමයි මම අද කියන්න යන්නේ.

ඉහත රූපයේ තියෙන්නේ සරල ජංහම දුරකතන ජාලයක් අනුරුවක්.

හරි දැන් අපි බලමු මේ HSDPA විකුනන අය කියන 3.6mbps, 7.2mbps, 14.2mbps කියන්නේ මොකද්ද කියලා. මේ වේගයන් එක cell tower (කුලුණකට) ලබාදිය හැකි උපරිම වේගය, නැතුව එක user කෙනෙකුට ලැබෙන වේගය නොවෙයි., මේක හොදට සිහියට ගතයුතු දෙයක්. උදාහරනයක් ගමු අපේ මේ ඉහත රූප සටහනේ Cell Tower C, අපි කියමු මේ tower එකේ වේගය 14.2mbps කියලා. මෙහි වේගය, Phone D, G (14.2/2 = 7.1mbps) අතර බෙදී යනවා. නමුත් සැබෑලෝකයේ එක cell tower එකක් ඉන්න users ලා ගාන මීට වඩා බොහෝ වැඩියි. ඒකෙන් පේනවා මේක වෙලද උපක්‍රමයක් මිස, සැබෑ ලොකයේ ලබාදෙන්න පුලුවන් දෙයක් නොවන බව.

Broadband speed ගැන කියනකොට, SLT ADSL වැනි ඒවාගේ කියන 512kbps, 2mbps කියන් වේගයන් වලට කියනේ Last mile connectivity, ඒ කියන්නේ ඔබ හා ඔබගේ සේවාදායකයාගේ ජාලය එක්ක ඔබ සම්බන්ද වන වේගය, නමුත් මේ HSDPA එකේ දී කියන්නේ ඔව්න්ගේ tower speed මිස, ඔබට සැබැවින් සම්බ්න්ද විය හැකි වේගය නොවයි. මොකද මේ කියන last mile එකද shared වෙනවා. මීට අමතරව සෑම කුලුනක්ම HSDPA 3.6mbps, 7.2mbps හෝ 14.2mbps වෙන්නේ ද නෑ, උදාහරනයක් තමයි ඩයලොග්, ඒ අයගේ 1.8mbps සිටන් 14.2mbps වෙන කුලුණු තියනවා. ඒක නිසා එක එක අයට ලැබෙන වේගයන් වෙනස්.

ඉහත කීව දේවල් අමතරව ලොකුවටම කරන වසන් කිරීම තමයි, Base Station සිට කුලුණට ඇති සම්බද තාවය, මෙය බොහෝවිට E1 එකක් වෙයි, මෙහි උපරිම වේගය 2048kbps (2.048mbps full-duplex; 2048kbps up and 2048kbps down) වෙයි. ඉතින් 14.2mbps උවද කුලුණ එයට ලැබෙන උපරිම වේගය 2048kbps මෙයද, voice, data හා tower control signal අතර බෙදීයනවා. City limit (කොලබ) ඉන්න අයට මේක ගොඩක් බලපාන්නේ අඩුවෙන්, මොකද මේ cell tower ගොඩක් හා, ඒ වයේ capacity ගොඩක් වැඩිවන ලෙස තිබීම. මොකද කොලබ දවල් කාලයේ තියන traffic load එක control කරන්න, රෑට ගොඩක් වේගයන් ලැබෙන්න පුලුවන්, මොකද සිටින users ලා ගාන රැට ගොඩක් අඩුවෙන නිසා.

ඉහත රූපයට අනුව අපි හිතමු Cell Tower C වෙත ඇත්තේ E1 එකක් කිලා, එවිට Phone D හා G අතර මේ 2048kbps බෙදී යනවා. මොකද tower speed එක 14.2mbps වෙන්න පුලුවන් නමුත් tower එකේ දත්ත සම්බන්දතාවය 2mbps. හිතලා බලන්න එක tower එකක් ඉන්නේ users ලා දෙන්නද කියලා ? මේක තමයි මේ ලොකුම හේතුව HSDPA වේගයන් ගොඩක් අඩුවීමට, මේවා ගැන කිසිම provider කෙන්ක් කතා කරන්නේ නෑ.

අනිත් වරද තමයි, Cell Tower කීපයක් අන්තර් සම්බන්ද කිරීම, ඉහත රූපයේ cell tower B ගමු, එය base station එකට සම්බන්ද කර ඇත්තේ cell tower A හරහාය, එවිට cell tower B හි සිටින අයට ලැබෙන්නේ Cell Tower A වෙත ලැබෙන වේගයන්ටත් වඩා අඩු වේගයක්, මේක ගොඩක් තියන ගැටලුවක් තමයි දුර පලාත්වලට යනකොට. මෙ වෙලාවට තමයි Phone E වෙත වෙලාවකට වැඩි වේගයන්ද, තව වෙලාවකට වැඩි වේගයන්ද ලැබෙන්නේ. මොකද Phone E, cell tower B සම්බන්ද වෙලා ඉන්නකොට අඩු වේගයක් ලැබෙනවා, නමුත Cell tower E වත සම්බද උන විට වැඩි වේගයක් ලැබෙනවා, මක්නිසාද Cell tower E හි කිසිම user කෙනෙක් නැතිවීම හා Cell tower E, Base Station වෙත කෙලින්ම සම්බන්දව තිබීම. තවද ඔබ Cell tower එකේ සිට ඉන්න දුරද ඔබට ලැබෙන වේගයන්ට බලපානවා, cell tower එකෙන් දුරස්වෙන්න වෙන්න ලැබෙන වේගය අඩුවෙනවා.

හරිම ආකාරය HSDPA tower එකක් 3.6mbps නම්, එය E1 x3 (2048×3=6144kbps) වත් සම්බද විය යුතුයි, මෙම 6mbps හින්, 3.6mbps HSDPA/3G/GPRS වෙන්වන අතර, ඉතුරු (2.4mbps) ටික Voice හා Control සිග්නල් වලට වෙන් වෙයි. මෙවැනි එකක normal එක user කෙනෙකුට 1-1.5mbps වේගයක් ලබාගන්න හැකිවෙනවා සැබෑලෝක (real world) තත්වයකදී.

මෙතනින් පේනවා මේ marketing සදහා කියන අංක කිසිම realistic නොවන බව.

හරි අන්තිම ගැටලුව, මේ International Bandwidth ගැන. මේ අය කියන්න පුලුවන් අපිට 100mbps, 155mbps හෝ 4gbps තියනව කියලා, නමුත් මේ කිසිම කෙනෙක් කියනේ නෑ, HSDPA සදහා වෙන්කරපු කොටස. ඒ අය කතා කරනේ ඒ අයගේ මුලු දාරිතාව මිස, HSDPA සදහා වෙන්කරපු කොටස ගැන නෙමෙයි. මොකද මේ වෙන්කරල තියන කොටස 10-20mbps වගේ තමයි වෙන්නේ.

ඉහත මම කියපු කරුනු මේ රැහැන් රහිත සේවාවන් වන CDMA, GPRS, WiMax වෙතද බලපානවා.

මතක තියාගන්න HSDPA යනු ගෙදර තියන Broadband එකට altanative එකක් නොවෙයි, මේක මේ MOBILE Internet නොහොත් ජංහම අන්ත්ර්ජාල සේවයක්, මේක broadband replacement එකක් නොවෙයි. HSDPA යනු Broadband මුලාවකි. කිසිම විටක 1-1.5mbps වඩා වේගයක් බලාපොරොත්තු වෙන්න එපා. 😀

177 thoughts on “ලංකාවේ HSDPA (Mobile Internet) මුලාව…

  • kelum dissanayake

    @sannaddha

    Thanks machan…
    Yes, we’ll fight together to tackle Dialog Suckers. They think they are the King while
    others think customer is the king.

    I’m in Malabe.
    So, if you can send me the ways to unlock this
    E220.
    email:- [email protected]

    @kalinga

    Can you open a new blog regarding to this dialog
    matter.
    thanks

  • අවංකවම කිව්වොත් D..ට වඩා M..හරි නිරවුල්,වේගවත් එමෙන්ම (වෙනත්විකල්පයක් නැත්නම්)සාධාරණයි.පිටතින් ගන්න(10.000-12.000 අතර) E220 HUAWEI MODEM එකක්,එයට D..M..A..ඕනෑම SIM එකක්දාන්න පුළුවන් විතරක් නොවේ යාන්තම් තනි සිග්නල් එකකින් වුවත් 1MB ආසන්නයි.(සිග්නල් ඇදී එනවා)මේ මගේත් දැනට එහෙමයි.මමත් ADSL(ලැබෙමින් පවතී)හැර වෙනත් සියළු මාග්‍ර්‍ ඇතිතරම් අත්දැක තිබෙනවා.(අනේ පව් මගේ සල්ලි 80.000ක් විතර)
    SAMAN/HOMAGAMA

  • නැවත ලියමි, කොල්ලනේ..ලංකාවෙ කිසිදෙයක් කියන පෙන්නන තරම් සැබෑවට ලැබෙන්නේ නෑ.1 HSDPAසදහා PHONE වලටවඩා (පිටතින් ගන්නාUNLOCKED MODEM) සුදුසුයි,වේගවත්.(FOR DATA SIM)
    2 CDMA කාගෙත්+ කොතනත්(කළාතුරකින් මහ රෑට හැර) ඉතාම මන්දගාමියි.කැමති ඡාතියකින් නොමිලේ දෙමි…!
    3 මේ අසීමිත 2MB -7MB වේගයක් ඇත්තටම? හැමෝටම?අවශ්‍යද?

  • Nadun

    Dialog’s prepaid broadband thing has come as result of Mobitel 3G Daily Delight which was introduced in last year. But Dialog has made it more unattractive to customers compared to Mobitel’s 3G delight. As usual dialog introduced this package with their ‘UNLIMITED’ tag line which means definitely it is another ‘Gunduwak’ to mislead customers. Let’s see the package.
    Interesting thing to count number of limitations in this ‘UNLIMITED’ broadband package. I found out some:

    1. Dialog FUP applies. Means the data is limited to 5GB with advertised speed.
    2. Speed is limited after FUP.
    3. Specially, the ‘Surfing time’ is limited (very low as 30minutes). but they say unlimited surfing.
    4. ‘Validity period’ also limited.

    Whatelse can you expect from this shitty service provider. This is ‘TYPICAL’ Dialog’s way of communication.

    Don’t get trapped for their communication. They have lost the preliminary feature of a service provider, which is ‘Trust’.

    Yet Another Unsuccessful Copycat attempt by Dialog.

  • Rasike

    want to add another point to the above post, its quite hard to configure the phone or modem to access internet, we have to call dialog and get the settings (cannot push settings to phone or modem), cannot use java applications when using phone to access internet, which is a very ugly thing if ur using Opera Mini to use internet like i do sometimes so have to use the phones internal browser,also have to make a unique username and pass as well by using a dialog web address, it took me about 1 hour to get the settings configured but it didnt work at the end,,,,,,,,

  • Kaushal

    Most of you may already know this but, SLT have reduced ADSL charges and introduced new packages. Details available at http://www.slt.lk/data/forhome/105adsl_charges.htm

    I requested a package upgrade from the 512k unlimited package to the 1m unlimited yesterday, and they said that it may take upto 3 days for the change to be done, however, to my surprise, when I came home yesterday, the upgrade had already been done, unfortunately, this package change does not seem to be a straightforward exercise. First of all, it involves changing your ADSL username from [email protected] to [email protected]. The CSR at the teleshop never told me about this change, and I only found out when my router was not connecting in the evening. After contacting the ADSL hotline, the guy at the call center promptly told me that I need to change my username, so assuming this to be my issue I thanked him and hung up. However, after changing the username, I still couldn’t connect, the router would show that ADSL carrier is up and the downstream datarate to be 1021 kbps and upstream datarate as 252 kbps, but it would stop with a “Timeout waiting for PADO packets” error. So I callled customer care again, the guy at the other end said that the matter needs to attended by the technical team and that someone from the technical team would contact me within an hour. Although it was around 6.45pm then, I was surprised to get a call from a technical chap from SLT within 15 mins, but after being on the line with him for about 15-20 mins verifying all settings and rebooting the router, I still could not connect. At this point the technical guy told me that the issue needs to be checked at the exchange and they will send someone there today to fix it. Although I never got a call today to confirm if the issue was fixed, ADSL is now working fine. It also appears that SLT have a new set of dynamic ip addresses starting from 112.135.x.x for the new packages, Speedtest.net is unable to determine who my ISP is and when I sign out of yahoo mail, it automatically redirects to Yahoo Australia homepage!!

  • SD

    Kalinga,
    I was thinking of buying the dialog 5490 offer and immediately unlocking the E220 to use it with a M3 package.
    in that case what is the minimum I would have to pay upfront just to get the device and disappear?
    Is it 5490(for Device)+ 2990*2(two months rental!)+1000 (connection fee) +3000 (Deposit)+Taxes.

    Does usual unlocking procedure work with current Dialog E220s?
    Thanks.

  • kelum dissanayake

    @SD

    hey I unlocked my E220 and it’s working fine.

    you can legally escape from the agreement as I done.

    Dialog have some issues with rapidshare downloading,.. I used it a key to escape
    from there agreement. So I claim using
    customer dissatisfaction.

    They immediately disconnect my connection and refund my deposit, they didn’t ask me the modem
    caz I paid it. 5490/=

    try that out…

    any problem with unlocking contact me

  • SD

    Kelum,
    Interesting! So did they return you all except 5490? What about the advance rentals & connection fee?
    would like to know the details of the Rapidshare strategy.Please let me know how I can contact you off line, if you don’t mind.
    Thanks,
    SD

  • kelum dissanayake

    @SD

    Hey u can contact me using my mail, [email protected]

    happy to help u all

    dialog is @ a loss of Rs. 388 Mn

    apen gasaaakapu widiyata ohoma wela madi,
    u remember the time they sell 1min incoming free sim for 2500Rs.

  • Rasike

    thanks guys, i will have to change my m3 plan, bcos 2Gb is just not enough, will have to move to either Airtel Unlimited or m3 7Gb plan, it seems m3 is a Quality for money while Airtel is Quantity for money,,, but all in all at the end what will count is the speed rite, everything from how fast the facebook page loads,the youtube movie streams and how fast the file gets downloaded, most of us hate that ‘waiting’ time and will probably be willing to give the right price to make it go faster,,,

  • mah

    @ rasika
    airtel is not good enough to fulfil your requirements. i have 1gb plan now (changed unlimited to 1gb) its difficult to watch you tube videos. it buffers every 2 second…. speed is between 150 & 350kb. stable so better than dialog.
    i ll publish sone speed tests tonight or tomorrow.

  • mah

    @ rasika
    airtel is not good enough to fulfil your requirements. i have 1gb plan now (changed unlimited to 1gb) its difficult to watch you tube videos. it buffers every 2 second…. speed is between 150 & 350kb. stable so better than dialog.
    i ll publish sone speed tests tonight or tomorrow..

  • MCK

    @Rasika,
    I agree with you regarding the description of Airtel and Mobitel. But when comes to dialog they don’t have either quality(due to poor unstable speed) or quantity(due to FUP shit) for money! But they provide funny jokes for money:-))

  • Thilina

    Mobitel, Huawei E160 modem eka unlock karanda system ekak kiyanda pls… (link or somthing pls, type karanda wena place ekak labune ne, sorry ok!)

  • Rasike

    i guess you must be talking about a ZTE modem right? i guessed so bcos it says “MF”, anyway i unlocked a ZTE MF 620 which was locked to TMN Portugal using the kulankendi server, its cost me 15 euros (about Rs.2300), you might be able to unlock the dialog one in the same way, but can only be sure after you try it, first download the kulankendi unlocking software and see if the MF 628 is supported. i still didn’t come across any other methods to hack and unlock ZTE modems like we do the Huwawei ones, guess it must be bcos ZTE has such a small market share not many ppl bother to write softwares to hack them. 🙁 , go to http://www.kulankendi.com and see ok.

  • Hey,
    I am currently living on outside the 3G coverage area,Is it possible to get at least 512 internet speed within GPRS coverage area through mobile broadband???
    Is mobitel provide 1Mb speed for their daily package (we can buy it paying Rs 25/= or Rs50/= per day)? and within GPRS coverage also??
    When i asked from there customer service ,One lady told They are giving 1Mb speed within GPRS coverage also Can we Belive it???

  • Dayan

    Thanks for the all informations.

    I have dialog mobile broadband campus package(Rs 1490) and now I completed 6 months. So I can shift to any other internet provider. I’m planing to shift Airtel unlimited one. Is it a good solution for me? Will Airtel give the same performance as Dialog?

  • @Dayan

    personally i cant say much about Airtel HSDPA since i haven’t used it as much, it can go from 200kbps-1.5mbps but all depend on time and where you are located, unlike Dialog Unlimited HSDPA, Airtel one is truly unlimited so there are no FUP etc.

  • Dayan

    @Kalinga

    Thanks for the reply. I’ll check with someone’s Airtel Connection in my location before I buy it. Keep it up.

  • Dayan

    @ Kalinga

    Thanks for the guidance. I have a direct view of the Airtel tower and it is about 400m far away. I got a Airtel sim and I’m getting a speed of 50KB/s at day time and it reduces more at night.

    By the way I’m getting more quality service than Dialog.

    I did some speed test on speedtest.net and I got some amazing test results

    http://www.speedtest.net/result/479334264.png

    upload speed is much higher than the download speed

    Is it a problem or just a HSDPA thing?

  • Sampath

    NEVER buy airtel 300 and 600 limited data packages..for an additional 1mb they charge 5.12 rupees..that means a half a cent per second..so an additional 1gb usage will cost you more than rs5000…anyway when i looked at the telecommunication regulatory commission website it said the approved charges for airtel 300 and 600 data packages are 0.05 cents per an additional kb. http://www.trc.gov.lk/images/pdf/Airtel_tarrif.pdf .i went to the airtel store and asked about it they said that it should be a “printing mistake” in trc website and CS didnt allow me to talk to their superiors..when i called CS hotline they told me that i may have made a mistake bcoz they have been operating packages for 4 months without a problem. But this is serious since they are charging 10 times more than accepted trc rates for pathetic speeds….I tried to compare airtel with other operators…mobitel charges 5 rs. per additional 10MB …dialog – Rs1 for 1 Mb…so Airtel charges 10 times more than mobitel and 5 times more than dialog…I asked about this also and they replied that they don’t have rentals.they only have monthly commitments..so their charges cant b compared with the other operators…THIS IS WORSE THAN DIALOG.becoz they charge 10TIMES more than what has been approved… But What can we do? Please halp me…

  • Nishantha

    Hay good news for Dialog HSPA customers…

    Dialog is going to update their Colombo base stations to 20Mbps ready… You will feel the deference within next couple of weeks…

  • mah

    @ kalinga
    writing after a long time…
    want a help .
    i m using mobitel HSPA connection and i connect through my HSPA phone. speed is 1 mb always and i get download speed of 120-135KB. OS of the laptop is vista. but you tube site is unusually slow. it buffers a lot.
    then i checked you tube site with my ADSL and it also very slow. and i checked the site with airtel sim also and it seems ok.(airtel is slow in all the sites and no difference in you tube)
    then i checked desktop which has XP for the same thing. and you tube works fine with both mobitel and ADSL.
    can you please help me to solve this?

  • Sanjaya

    Hay

    Dialog 3G experience improved lot… i am in Dehiwala and i get more than 1.5Mpbs in speednet site… sites are loading prity fast…
    also no prob for the you tube as well

  • mah

    @ kalinga

    i saw article saying that mobitel going to launch NGN in the form of LTE…
    do you know the time frame and speed they are going to give? i read its about 326mbps down link…..

  • mah

    @ kalinga
    it cant be too far!!
    i searched the net and found these. LTE will come with the next phase.

    —-Sri Lanka Telecom Mobitel, having launched the first 3.5G HSPA network in South Asia, announced today its commitment to embrace Next Generation Network (NGN) with its next phase of expansion which will eventually reach a total over 2500 base stations with an emphasis in covering the North and East of Sri Lanka. In pursuit of its vision to “Lead Sri Lanka towards an infocom and knowledge rich society”, the National Mobile Service provider is set to advance its engine with latest NGN, in order to eventually realize ‘Broadband for All’.
    —-The company is set to enhance the capacities of its backhaul to energize both the new and existing sites, taking the fullest advantage of its parent’s (Sri Lanka Telecom PLC) sophisticated IP/MPLS optical fiber backbone, while commencing trials on Long Term Evolution (LTE) as its Next G. This initiative augers well for welcoming and actively supporting the ‘Next Generation Networks Standardization Forum’ hosted by the Telecommunications Regulatory Commission of Sri Lanka (TRCSL) together with the International Telecommunication Union (ITU) and the Commonwealth Telecommunication Organization (CTO), held during the period from 07th to 10th of April, in Colombo.—-

    http://www.mobitellanka.com/about/news_press_releases/news_press_2009_mobitel_strikes_with_its_pledge_to_launch_ngn.html

    ——–Mobitel CEO, Suren J. Amarasekara stated that while his organisation has pledged to undertake investments into NGN discussions are underway to unveil LTE and 4G technology soon. “We want to bring down the costs of technology in the future and we are proud to say that Sri Lanka is in par with any other developed country in the worlds in terms of adoption of the latest ICT technologies.”—-

    http://www.itpro.lk/?q=node/1960

    i want to know this because i want to buy USB modem. if LTE comes will the modem be usable with that???

    and i got a good news for all!!!!!!!!!
    mobitel zoom tariff will be revised with in week or so. they will give 8Gb for 1200/=
    and 1Gb will be 240/= approx.

  • @mah

    don’t believe every thing you read, LTE will take some time, i say maybe in 2013~14 maybe, since LTE mean they need to upgrade there network once more, don’t think the network will spend that much money once more after spending on the 3G to HSDPA upgrade, so will take time.

    also no HSDPA modem will NOT work with LTE. also there are no LTE devises for sale at the moment. in USA LTE tests will stare in 2010 or so.

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