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Uplink/Downlink Frequencies in GSM/CDMA

Viewing 15 posts - 46 through 60 (of 63 total)
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  • 31st July 2007 at 18:41 #37015
    Umar Khan
    Guest

    hy fellows can any U please find answer of my simple question…?

    Q—> Whats is the data rate of Um Air Interfacein of GSM…?

    Q—> Which specific protocols used in NGN architecture..?

    Many Thankx..!

    31st July 2007 at 21:40 #37016
    Pix
    Guest

    Q1 –> one timeslot on the air interface for GSM carries up to 22.8 kbps of ‘raw’ data in GSMK modulation (voice or GPRS), and up to 55kbps in 8PSK modulation (EDGE).

    one user can get up to n timeslots when transferring data (GPRS / EDGE), depending on the class of the mobile. It is usually 4 timeslots… so the data rate can reach 220kbps in excellent condition. In urban environment, one user can usually expect 180kbps (outside busy hours).

    Q2 –> i don’t know about NSS, sorry…

    1st August 2007 at 10:22 #37017
    Umar Khan
    Guest

    the main prorool used in NGN are
    1. The SIP or H323 protocolfor signaling between two Softswitch.
    2. The MGCP or H248 to control MGW.
    3.The Sigtran in order to carry the SS7 message over the IP network.

    2nd August 2007 at 09:18 #37018
    Umar Khan
    Guest

    Thx alot Pix….! 🙂

    1st December 2010 at 05:36 #37019
    awii
    Guest

    hi everyone,can any one tell me why a site gets intermittent every now and then…even the technicans from erricssion cannot solve this issue and its exactly one month.
    please assist with some hints

    20th December 2010 at 09:48 #37020
    Anoop
    Guest

    What is the frequency used in CDMA

    18th January 2011 at 16:46 #37021
    srikanth ponnam
    Guest

    cdma
    uplink 824-849mhz
    downlink869-894mhz
    carrier frq 1.25mhz

    26th February 2011 at 02:54 #37022
    devendra
    Guest

    what is downlink frequency of 1900 mhz.

    24th August 2011 at 08:54 #37023
    KALYAN KRISHNA AWASTHI
    Guest

    WHY IS THE UPLINK FREQUENCY LOWER THAN THE DOWNLINK FREQUENCY IN CDMA?
    IS THERE ANY OTHER REASON EXCEPT THE POWER TRANSMITTING CAPABILITIES OF MOBILE SET AND THE BASE STATION?
    PLEASE CLEARIFY

    24th August 2011 at 08:57 #37024
    KALYAN KRISHNA AWASTHI
    Guest

    what are the major drawbacks associated with the 6/4 GHz band used for up-link /down-link transmission in a satellite communication link?

    11th April 2012 at 06:13 #37025
    karthika
    Guest

    wat is the exact uplink and downlink frequency

    24th April 2012 at 12:21 #37026
    AVANISH MISHRA
    Guest

    for GSM-1900
    downlink freq=1710-1785MHz
    uplink freq=1805-1880MHz

    13th August 2013 at 04:44 #37027
    manoj
    Guest

    hi friends,
    why downlink frequency is greater than uplink frequency in GSM bands?

    13th June 2014 at 04:17 #37028
    Anshu
    Guest

    since lower frequency transmitted by the handset ,it can go to higher distance with low power. low power is important bcoz’ it’s battery power equipment.

    15th December 2014 at 07:55 #37029
    kumar
    Guest

    need a uplink & downlink frequency

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