March 2012 - Telecommunications Blog

A blog for mobile communications systems GSM , UMTS and LTE

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Tuesday, March 27, 2012

what's 4G LTE-Advanced ?

3/27/2012 12:46:00 PM 0
what's 4G LTE-Advanced ?
The following essential landmark may be the standardization associated with LTE-Advanced (LTE Rel. 10 and beyond). To ensure that the actual mobile telecoms technologies will be able to come up with technology that could contend, you ought to make sure that brand new mobile technology are now being developed as well as created. This is actually the thinking at the rear of beginning the introduction of the brand new LTE-Advanced techniques, showing the actual technologies as well as building the actual LTE-Advanced requirements.


 While LTE's peak downlink speed is theoretically 300 Mbps, LTE-Advanced can ostensibly reach 1 Gbps but realistically would get only 100 Mbps in everyday use. LTE's uplink peak rates of 75 Mbps pale in comparison to LTE Advanced's 500 Mbps.

 Along with function beginning upon LTE-Advanced, numerous crucial specifications as well as crucial functions tend to be visiting lighting. While not set however within the specs, there are lots of higher level is designed for your brand new LTE-Advanced standards. These types of will have to become confirmed and far function continues to be carried out within the specs prior to they are almost all set. 

Presently a few of the primary heading is designed with regard to LTE-Advanced is visible beneath :-
  1. Peak data rates : downlink - 1 Gbps; uplink - 500 Mbps.
  2. Spectrum efficiency : 3 times greater than LTE.
  3. Peak spectrum efficiency : downlink - 30 bps/Hz; uplink - 15 bps/Hz.
  4. Spectrum use: the ability to support scalable bandwidth use and spectrum aggregation where non-contiguous spectrum needs to be used.
  5. Latency : from Idle to Connected in less than 50 ms and then shorter than 5 ms one way for individual packet transmission.
  6. Cell edge user throughput to be twice that of LTE.
  7. Average user throughput to be 3 times that of LTE.
  8. Mobility : Same as that in LTE
  9. Compatibility : LTE-Advanced shall be capable of interworking with LTE and 3GPP legacy systems. 
LTE-Advanced would to be moving in numerous areas within 2013, along with suitable devices as well as gadgets growing together with this particular release.

    Thursday, March 22, 2012

    lte service providers

    3/22/2012 12:39:00 PM 0
    lte service providers
    This is a listing of businesses that are offering LTE technologies associated parts.




    4M Wireless designs and develops leading edge products to enable fourth generation mobile wireless based on the latest 3GPP Long Term Evolution (LTE) standards.


    1st to deliver 3GPP LTE design and style automation, sign generation and also sign analysis equipment, Agilent has recently included protocol test and network signaling analysis remedies.


    You can transform to an all IP LTE network to reduce your cost per megabit, increase capacity, and build a service-aware infrastructure for mobile broadband services.


    Altair Semiconductor is a leading developer of ultra-low power, small footprint and high performance 4G chips for LTE.


    Anritsu continues to be taking part positively within the 3GPP standardization of those brand new technology simultaneously because operating carefully using the main infra-structure, chip-set as well as fatal programmers.


    The Aricent Group is a global innovation and technology services company that helps clients imagine, commercialize, and evolve products and services for the connected world.
    As a member of the 3GPP, Aricent is committed to investing in developing and supporting solutions for Long Term Evolution (LTE).


    It provides a complete portfolio of software solutions for air interface monitoring, benchmarking, Mobile Applications, and analysis.


    Founded in 1986 in Berlin, AVM is one of the top two manufacturers of broadband devices in Europe.


    Bridgewater Systems, the global leader in intelligent broadband controls, provides pre-integrated solutions for mobile and converged operators to Transform their networks to 4G: WiMAX, LTE, and WiMAX to LTE.

    Wednesday, March 14, 2012

    what is 4G LTE cellular technology ?

    3/14/2012 02:20:00 PM 0
    what is 4G LTE cellular  technology ?
    Its full name is 3GPP Long Term Evolution for the Universal Mobile Telecommunications System, or 3GPP UMTS LTE for short. LTE (Long Term Evolution) is a wireless broadband technology designed to support roaming Internet access via cell phones and handheld devices.


    Where the current generation of mobile telecommunication networks are collectively known as 3G, LTE is marketed as 4G.


    Requirements :

    • Reduced cost per bit
    • Increased service provisioning – more services at lower cost with better user experience
    • Flexibility of use of existing and new frequency bands
    • Simplified architecture, Open interfaces
    • Allow for reasonable terminal power consumption

    LTE Specifications :



     LTE uses two different types of air interfaces (radio links), one for downlink (from tower to device), and one for uplink (from device to tower).For the downlink, LTE uses an OFDMA (orthogonal frequency division multiple access) air interface For the uplink (from device to tower), LTE uses the DFTS-OFDMA (discrete Fourier transform spread orthogonal frequency division multiple access) scheme of generating a SC-FDMA (single carrier frequency division multiple access) signal. 

    The major difference between the OFDMA signal for downlink and the SC-FDMA signal for uplink is that it uses a discrete Fourier transform function on the data to convert it into a form that can be used to transmit.