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What is LTE?

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posted Apr 13, 2013 by Poornachand Srinivas

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So, what is LTE? To most, it is a faster network technology. To network operators around the world, it is a way to simplify their infrastructures to reduce costs while improving the quality of their offerings to subscribers. Advertisements by network operators declare it as the “most advanced” network technology. In the end, it is Long Term Evolution of the Universal Mobile Telecommunications System (UMTS).But that doesn’t tell us what LTE actually is.
LTE is what the 3GPP (3rd Generation Partnership Project, the group responsible for standardizing and improving UMTS) designates as their next step. UMTS is the group of standards that define 3G for GSM networks across the world, including AT&T and T-Mobile’s 3G networks. This does not mean a thing to CDMA2000 subscribers, since CDMA2000 is not maintained by the 3GPP. For CDMA2000 subscribers, LTE is the replacement of mediocre CDMA2000 networks offered by Verizon Wireless, Sprint, au by KDDI, and others with a superior cellular telecommunications system offering flexibility and power to the network operator and the subscriber.
LTE is a very good, easily deployable network technology, offering high speeds and low latencies over long distances. For example, the three LTE networks in New York City were rated well. Verizon’s LTE service was rated with an average download speed of 7.67Mbps and an average upload speed of 3.76Mbps. AT&T’s LTE service was rated with an average download speed of 19.21Mbps and an average upload speed of 10.09Mbps. Sprint’s LTE service was rated with an average download speed of 12.35Mbps and an average upload speed of 4.24Mbps. Verizon’s 3G service was rated with an average download speed of 0.47Mbps and an average upload speed of 0.15Mbps. Sprint’s 3G was similarly bad. Similar ratings followed in other cities as well.

I hope this will help...

answer Apr 14, 2013 by anonymous
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LTE, an initialism of long-term evolution, marketed as 4G LTE, is a standard forwireless communication of high-speed data for mobile phones and data terminals. It is based on the OFDMA/SCFDMA network technologies, increasing the capacity and speed using a different radio interface together with core network improvements.] The standard is developed by the 3GPP (3rd Generation Partnership Project) and is specified in its Release 8 document series, with minor enhancements described in Release 9.

answer Apr 13, 2013 by Salil Agrawal
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What is code rate in LTE? Why it is fixed to 1/3? what is rate matching LTE?

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I would like to change PDCP SN to 12 bits ( 7 bits is current) but not clear the effect.

From my understanding, if i increase the PDCP size to 12 bits (4096) for UE side it would be easier to decode packets correctly because sequence number will be identified with more bits.

What is your opinion?

Also since we increase the header for PDCP sn then data payload will be smaller so we can affect the throughput.


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