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E or G symbol on nokia handsets

Viewing 14 posts - 1 through 14 (of 14 total)
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  • #55592 Reply
    roopa
    Guest

    How does a GPRS attached Mobile Station know whether a cell site is only GPRS or EDGE enabled ?? is it present in the System Information ???

    #55593 Reply
    Pix
    Guest

    Probably ๐Ÿ™‚ And that should be in the 3GPP… but where ?? I’ll try to find it out tomorrow.

    #55594 Reply
    roopa
    Guest

    hey pix… got the answer???

    #55595 Reply
    Pix
    Guest

    … i’m sorry, i’m very very busy…
    have you try drilling into the 3GPP ?

    #55596 Reply
    Pix
    Guest

    Hi,
    I got the answer:

    The System Information 13 is modified:
    broadcast of the fields EGPRS_PACKET_CHANNEL_REQUEST and BEP_PERIOD in SI13 message is done if cell is EGPRS capable.

    So the MS knows beforehand if the cell is EGPRS or GPRS (or nothing, if there is no SI13).

    #55597 Reply
    paraHO
    Guest

    3GPP TS 0460

    #55598 Reply
    Alex Riche
    Guest

    EGPRS_PACKET_CHANNEL_REQUEST is used by handset & not by the network.

    What exactly does the network tell the MS??

    #55599 Reply
    Pix
    Guest

    Alex,

    a SI message is broadcasted by the cell (the si13), and in this si, there is the field EGPRS PACKET CHANNEL REQUEST.

    I’m not talking about the uplink channel request message.

    #55600 Reply
    Alex Riche
    Guest

    RAC, Network Control Order parameters, GPRS Power Control parameters, Options – NMO & Access burst type would be carried on SI 13 when PBCCH is not available.

    I wonder where EGPRS PACKET CHANNEL REQUEST would be part of that. That is part of PSI1 message.

    #55601 Reply
    Pix
    Guest

    well, it’s there… keep looking ๐Ÿ™‚ i don’t think it’s an alcatel-lucent proprietary implementation, youshould be able to find the same thing in all vendors.

    #55602 Reply
    Alex Riche
    Guest

    ๐Ÿ™‚

    It might sound strange! I could not find any piece of document until now which specifies that “EGPRS PACKET CHANNEL REQUEST” is part of down link. The name itself very much sounds like uplink! Spent some days on specs!

    #55603 Reply
    Pix
    Guest

    Alex Riche,

    you got to love specs now, don’t you?

    a channel request is an uplink message, but it doesn’t mean that this name can’t be used as a field name in a downlink message ๐Ÿ˜‰

    I’m glad you spent time looking for it. Would you mind sharing in which spec you found it exactly ?

    #55604 Reply
    Alex Riche
    Guest

    ๐Ÿ™‚

    0460-8l0 & 0408-7l0 predominantly & few other related docs!

    am going nuts, but at the same time just loving the wonder called “GSM”. Man, am in love with it.

    #55605 Reply
    Pix
    Guest

    GSM oozes brainiak stuff… you can feel people did really think it through, 15 years ago :))

Viewing 14 posts - 1 through 14 (of 14 total)
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