Posts Tagged ‘long term evolution’

AT&T to Launch LTE in 5 Cities, Summer of 2011

Wednesday, July 13th, 2011
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AT&T says it is on track to launch Long Term Evolution services in five U.S. markets “this summer (2011)” Atlanta, Chicago, Dallas, Houston and San Antonio are the initial cities. AT&T says it will add at least 15 markets and to cover a potential population of 70 million Americans by the end of 2011 as well.

Some analysts have forecast that the United States will have around 20 million Long Term Evolution subscriptions by end of 2012, and an additional six million mobile WiMAX subs, which would represent close to 25 percent of the global total of 4G subscriptions, says Strategy Analytics. That would, by anybody’s estimation, make the United States a “leader” in 4G adoption. But it isn’t clear that particular distinction means much, by itself.
In times past the United States has been called a “laggard” in mobile phone penetration, “behind” other nations in use of text messaging and now is called by some a middling country in terms of broadband penetration. But the United States appears on track to become “the leading battleground” for 4G mobile services, says Susan Welsh de Grimaldo, Strategy Analytics director. See http://ipcarrier.blogspot.com/2010/03/us-to-lead-in-4g-deployment-does-it.html.
“With broad commitments to LTE and WiMAX service launches, US operators will speed up the competition and create one of the most influential markets for new mobile broadband services and devices,” she says.
The point is that cross-national comparisons are difficult, and often of questionable value. The U.S. market no longer is “behind” in text messaging or mobile adoption in any meaningful way. And while one always can argue average or typical speeds are not the fastest in the world, most countries that are “ahead” on such measures are very-small countries with high population density, which makes construction far easier than is the case for a continent-sized country with lower density.
Nor will it mean quite so much to say the United States will “lead” in 4G, either. Lagging broadband metrics do not seem to have impaired U.S. innovation in software and Internet development, for example.

Some analysts have forecast that the United States will have around 20 million Long Term Evolution subscriptions by end of 2012, and an additional six million mobile WiMAX subs, which would represent close to 25 percent of the global total of 4G subscriptions, says Strategy Analytics. That would, by anybody’s estimation, make the United States a “leader” in 4G adoption. But it isn’t clear that particular distinction means much, by itself.

In times past the United States has been called a “laggard” in mobile phone penetration, “behind” other nations in use of text messaging and now is called by some a middling country in terms of broadband penetration. But the United States appears on track to become “the leading battleground” for 4G mobile services, says Susan Welsh de Grimaldo, Strategy Analytics director. See http://ipcarrier.blogspot.com/2010/03/us-to-lead-in-4g-deployment-does-it.html.

“With broad commitments to LTE and WiMAX service launches, US operators will speed up the competition and create one of the most influential markets for new mobile broadband services and devices,” she says.

The point is that cross-national comparisons are difficult, and often of questionable value. The U.S. market no longer is “behind” in text messaging or mobile adoption in any meaningful way. And while one always can argue average or typical speeds are not the fastest in the world, most countries that are “ahead” on such measures are very-small countries with high population density, which makes construction far easier than is the case for a continent-sized country with lower density.

Nor will it mean quite so much to say the United States will “lead” in 4G, either. Lagging broadband metrics do not seem to have impaired U.S. innovation in software and Internet development, for example.


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Clearwire to Test LTE

Wednesday, August 4th, 2010
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The other shoe has not yet formally dropped, but Clearwire now says it will conduct Long Term Evolution tests across its network, including both tests of frequency division and time division versions of LTE, plus the ability of LTE air interface technologies to coexist harmoniously with the existing WiMAX air interface already in use.
The tests do not definitively confirm a partial switch to LTE, but are a concrete bit of evidence that LTE will be part of Clearwire’s future.
Clearwire intends to conduct FDD LTE (Frequency Division Duplex) tests using 40 MHz of spectrum, paired in 20 MHz contiguous channels, of its 2.5 GHz spectrum. Clearwire expects to confirm the capability to produce real-world download speeds that range from 20 Mbps to 70 Mbps. This is expected to be significantly faster than the 5 Mbps to 12 Mbps speeds currently envisioned by other LTE deployments in the U.S., which will rely on smaller pairs of 10 Mhz channels or less.
Clearwire will concurrently test TDD LTE (Time Division Duplex), in a 20 MHz configuration, which is twice the channel size currently used in its 4G WiMAX deployments.
Clearwire will also test WiMAX co-existence with both FDD LTE and TDD LTE to confirm the flexibility of its network and spectrum strength to simultaneously support a wide-range of devices across its all-IP network.
My own anecdotal experience with Clearwire’s network is that, as you would expect, 4G is faster than 3G. But I have to say my experience also points out how much end user application latency is to be found elsewhere in the delivery ecosystem, such as the far-end servers. I also would observe that the 4G network signal seems more fragile than the 3G signal. Even in areas with both 4G and 3G available, the 4G often loses enough signal strength that my smartphone defaults back to 3G.
I’m not complaining, just noting that, as with many earlier increases in access bandwidth, faster is better, up to a point. If nothing else, having more access bandwidth simply points out latency elsewhere in the ecosystem.

Clearwire now says it will conduct Long Term Evolution tests across its network, including both tests of frequency division and time division versions of LTE, plus the ability of LTE air interface technologies to coexist harmoniously with the existing WiMAX air interface already in use.

The tests do not definitively confirm a partial switch to LTE, but are a concrete bit of evidence that LTE will be part of Clearwire’s future.

Clearwire intends to conduct FDD LTE (Frequency Division Duplex) tests using 40 MHz of spectrum, paired in 20 MHz contiguous channels, of its 2.5 GHz spectrum.

Clearwire expects to confirm the capability to produce real-world download speeds that range from 20 Mbps to 70 Mbps. This is expected to be significantly faster than the 5 Mbps to 12 Mbps speeds currently envisioned by other LTE deployments in the U.S., which will rely on smaller pairs of 10 Mhz channels or less.

Clearwire will concurrently test TDD LTE (Time Division Duplex), in a 20 MHz configuration, which is twice the channel size currently used in its 4G WiMAX deployments.

Clearwire will also test WiMAX co-existence with both FDD LTE and TDD LTE to confirm the flexibility of its network and spectrum strength to simultaneously support a wide-range of devices across its all-IP network.


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Verizon Promises 30 mSec LTE Latency

Monday, July 19th, 2010
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Verizon Wireless users will experience latency of just 30 milliseconds when the new Long Term Evolution network is launched later this year. That will be quite helpful for users of real-time services including voice, video and cloud-based services.


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