23.10.2007, 14:26
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#2
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Inventar
Registriert seit: 02.04.2002
Alter: 61
Beiträge: 5.198
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ah jo - uiiiii
Zitat:
LTE is the natural evolution of 3GPP GSM and WCDMA networks. It is also an evolution candidate for 3GPP2 CDMA networks. Efforts are underway to harmonize the standards.
LTE itself is a new paradigm in access, with a new modulation technique, OFDM (Orthogonal Frequency Division Multiplex), and antenna technology, MIMO (Multiple Input Multiple Output).
OFDM splits the information into multiple narrowband subcarriers, allowing each of them to carry a portion of the information at a lower bit rate, which makes OFDM a very robust modulation, particularly in multipath scenarios, like urban areas.
MIMO technology creates several spatial paths on the air interface between the network and the subscriber; so these paths can carry the same or different streams of information, allows an increase in either the coverage (due to higher Signal to Noise Ratio (SNR) at the receiver) or the user data throughput.
LTE, combining OFDM and MIMO, will provide on average up to 5 times greater spectral efficiency than the most advanced 3G networks, reducing the cost per bit and allowing better economics for operators and end users.
The result is affordable mass market wireless broadband services that will boost Operator profitability. Faster downloads, video sharing, true Mobile TV with more channels and enhanced quality are just some examples of applications that will benefit from LTE's greater performance.
Long Term Evolution
LTE (Long Term Evolution) is the next generation mobile wireless broadband technology that will enable Operators to offer wireless broadband services at affordable costs while providing enhanced performance and capacity over current 3G wireless networks.
LTE is the natural evolution of 3GPP GSM and WCDMA networks. It is also an evolution candidate for 3GPP2 CDMA networks. Efforts are underway to harmonize the standards.
Nortel is part of a joint initiative of telecom technology manufacturers and network operators aimed at driving forward the realisation of the next-generation of high performance mobile broadband networks based on 3GPP Release 8 "Long Term Evolution / System Architecture Evolution" (LTE/SAE) specifications.
Read the article to learn more.*
Inside LTE
LTE itself is a new paradigm in access, with a new modulation technique, OFDM (Orthogonal Frequency Division Multiplex), and antenna technology, MIMO (Multiple Input Multiple Output).
OFDM splits the information into multiple narrowband subcarriers, allowing each of them to carry a portion of the information at a lower bit rate, which makes OFDM a very robust modulation, particularly in multipath scenarios, like urban areas.
MIMO technology creates several spatial paths on the air interface between the network and the subscriber; so these paths can carry the same or different streams of information, allows an increase in either the coverage (due to higher Signal to Noise Ratio (SNR) at the receiver) or the user data throughput.
LTE, combining OFDM and MIMO, will provide on average up to 5 times greater spectral efficiency than the most advanced 3G networks, reducing the cost per bit and allowing better economics for operators and end users.
The result is affordable mass market wireless broadband services that will boost Operator profitability. Faster downloads, video sharing, true Mobile TV with more channels and enhanced quality are just some examples of applications that will benefit from LTE's greater performance.
Evolved Architecture
LTE comes hand in hand with SAE (System Architecture Evolution), an evolution of the Core Network towards a flat, packet only, all-IP based architecture.
In SAE, the network is composed of only two node types, the Base Station or eNodeB (evolved NodeB) and the AGW (Access Gateway)
This architecture enhancement reduces the latency of the network (in the range of 10-20 msec round trip, an improvement of 50-200% when compared to the most advanced 3G networks), required to provide real-time applications, like VoIP or on-line interactive gaming.
It lowers total cost of ownership as fewer network nodes will need to be installed and managed. Nortel can also provide cable reduction technology and integrated backhaul solutions to minimize the total cost of ownership of the network.
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somit nur gewinnmaximierung der mobilbetreiber und was das allem mit news zu tun hat, na ja
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