Reply With QuoteThey don't have a choice if they want to survive, WIMAX alone is not going to work. WIMAX, particularly in the spectrum it's currently deployed in, is a failure.
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I've got more phones than fingers
http://www.totaltele.com/view.aspx?ID=464629
Sprint drops strongest LTE hints yet
By Nick Wood , Total Telecom, in San Jose
Tuesday 10 May 2011
U.S. mobile operator says announcements to be made soon; aims to reuse 800-MHz iDEN spectrum.
Sprint has given the strongest indications to date about adopting LTE to power its high-speed mobile network.
"There is a high likelihood that LTE is in our future in one flavour or another," said Geoff Martin, who heads up the U.S. operator's M2M collaboration centre in Silicon Valley, on Monday.
"Announcements will be made soon," he declared, without giving a specific date.
Sprint has until now used WiMAX technology as the basis for its next-generation mobile network, but with LTE adoption more prevalent among the world's mobile operators the ecosystem for WiMAX is likely to be limited by comparison.
"We don't want to be an island," said Martin.
A switch to LTE would bring Sprint in line with its rivals, and Martin said it plans to reuse the frequencies currently utilised by its iDEN network.
"Sprint has been sitting on 14 MHz of contiguous 800-MHz spectrum, which is really valuable, really powerful, and using it for a 1.5 [generation] push-to-talk network," he said.
My screen is bigger than yours
They don't have a choice if they want to survive, WIMAX alone is not going to work. WIMAX, particularly in the spectrum it's currently deployed in, is a failure.
I've got more phones than fingers
They will deploy LTE in the same spectrum as Wimax (2.5GHz) as well as PCS and 800MHz SMR spectrum.Originally Posted by boomhower
I've climbed a cellphone tower
Agreed. WiMax works as a technology (provided there is adequate backhaul and enough cell sites), but at 2.5 ghz, it flat out sucks. If you move, the signal is gone. If you touch the device, its gone. 800 is the best thing Sprint can do, and needed to do it 2 years ago.
I have a blue tooth
Does anyone think ditching WiMax will open up better handset choices?
I've got more phones than fingers
Eventually, yes! I don't expect a flood until the integrated CDMA/LTE chipsets have been debugged.
I've climbed a cellphone tower
Right now, there are no CDMA/LTE chips (and likewise there aren't CDMA/WiMAX chips). The phones supporting WiMAX or LTE are using two chips to accomplish the task. That also explains the bulk and limited battery life. That's also why Apple wants to wait on LTE. Since it requires two chips, they'd have to enlarge the phone to accommodate it and the device would take a significant hit on battery life - as well as costing significantly more from their parts perspective.
I think the Qualcomm M9615 will be the first to offer an integrated chip. It'll support basically everything except WiMAX - even dual-carrier HSPA+ which means speeds of 84Mbps and GLONASS, the Russian GPS system that it can use in combination with the GPS system for faster locks and better accuracy.
So, CDMA/LTE chipsets aren't buggy. It's just that using multiple chips where most phones use one and that means crap battery life.
While carriers are aggressively marketing "4G", it's a tad pre-mature. I mean, Verizon users are able to get high speeds (higher than Verizon claims) because Verizon has only 500k customers on their network. Sprint's 4G speeds are, well, the same as AT&T's 3G speeds according to independent tests. AT&T and T-Mobile are pushing HSPA+ in the interim, but they lose the "new unused spectrum" effect that Sprint and Verizon get since HSPA+ also supports all of their 3G devices (for both voice and data).
It looks like it's going to be 2Q2012 before we see 4G really take off. By that time, there will be chips that support CDMA, GSM, and LTE all on one chip and there should be decent deployment of 4G services.
I've got more phones than fingers
"Qualcomm’s Snapdragon MSM8655 system-on-chip combines Qualcomm’s enhanced CPU at up to 1.2 GHz, latest Adreno GPU and low-power architecture to provide Verizon Wireless customers with the company’s most highly optimized chipset for application performance available today. With the ability to provide virtually anywhere, anytime access to a variety of 3G and 4G network technologies, Qualcomm’s MDM9600 chipset is Gobi™-enabled and supports theoretical LTE data rates with full backward compatibility to EV-DO Rev. A/Rev. B."
http://www.qualcomm.com/news/release...tivity-devices
"The MDM9200 and the MDM9600 chipsets are the industry's first multi-mode 3G/LTE solutions that allow UMTS and CDMA2000® operators to upgrade seamlessly to future LTE services while preserving backward compatibility to their existing 3G networks. MDM9200 supports UMTS, HSPA+ and LTE, while the MDM9600 supports CDMA2000® 1X, EV-DO Rev. B, SV-DO, SV-LTE, UMTS, HSPA+ and LTE. All of the new chipsets support FDD LTE and TDD LTE modes and different carrier bandwidths, and are capable of using orthogonal frequency division multiple access (OFDMA) and multiple-input and multiple-output (MIMO) antenna technology to support peak data rates of up to 100 Mbps on the downlink and 50 Mbps on the uplink."
http://www.qualcomm.com/news/release...multi-mode-3gl
The MDM9600 CDMA/LTE/HSPA+ integrated chipset is available right now in the thunderbolt. The MDM series of chipsets are for data cards, USB sticks, etc, where the power budget is much larger. We have to wait until the MSM 9600 series is widely available. Well, they are available to select handset manufacturers, but they are not ready for prime time. They are getting put through their paces, but they're not where they need to be in terms of power consumption yet. I agree that we will probably see MSM9600 based handsets in mid 2012. Verizon might release them earlier, even though they're not ready for prime time.
I've got more phones than fingers
Oh Yes....eventually.Dropping WiMax and iDen to convert over to LTE is really the only way for Sprint to go.To finally have a universal technology will allow for it. It took Sprint longer than it should have to make this decision but,hey, better late than never. Even Verizon's LTE network won't be 100% for at least another year so Sprint's still got time.
A Great Commercial for a Beautiful Automobile : The Oldsmobile Aurora
I've got more phones than fingers
Sprint has plenty of time. Verizon's on the bleeding edge and it shows. Verizon's whole LTE network crashed for a whole day+ and there are still people that are having problems. Handsets are unreliable and battery hogs.
I've got more phones than fingers
Verizon has done a good job setting up LTE but it's a huge task. From what I've read the Samsung Charge is 2x as good on LTE battery life than the Thunderbolt. I really think VZW underestimated just how much juice LTE sucks out of a phone.Another year will make all the difference in the world. Better,more battery efficient LTE processors for the devices.These aren't even real LTE devices(only LTE data,still CDMA voice).Meanwhile,Verizon will be able to stabilize and expand it's LTE network.Sprint can learn alot by watching VZW. I wonder how AT&T's coming along with their LTE plans? Right now I'm skipping the first wave of LTE handsets and will upgrade to an EVDO Rev.A/WiFi N smartphone. By the time I'm ready to upgrade again it'll be a whole new world of choices.
I've got more phones than fingers
There wil be hybrid CDMA/LTE handsets for a long time. CDMA voice particularly 1x Advanced is stiil the most efficient voice technology. VOLTE is a long way from being implemented even though Verizon is pressing its partners to hurry up.Verizon has done a good job setting up LTE but it's a huge task. From what I've read the Samsung Charge is 2x as good on LTE battery life than the Thunderbolt. I really think VZW underestimated just how much juice LTE sucks out of a phone.Another year will make all the difference in the world. Better,more battery efficient LTE processors for the devices.These aren't even real LTE devices(only LTE data,still CDMA voice).Meanwhile,Verizon will be able to stabilize and expand it's LTE network.Sprint can learn alot by watching VZW. I wonder how AT&T's coming along with their LTE plans? Right now I'm skipping the first wave of LTE handsets and will upgrade to an EVDO Rev.A/WiFi N smartphone. By the time I'm ready to upgrade again it'll be a whole new world of choices.
My antenna is smaller than yours
What form of LTE do you think Sprint is likely to go with? FDD LTE or TDD LTE?
What's the difference and which is better?
From the state that everyone has a map of on their hand.
I've got more phones than fingers
On their 800MHz and 1900MHz they will go with FDD LTE. On their 2.5GHz they will go with TDD LTE. They (Clearwire) flirted around with subdividing their considerable spectrum in the 2.5 GHz band into two FDD bands and an TDD band. I think that during the Clearwire/T-Mobile spectrum sale talks, T-Mobile asked them to perfrom some tests of FDD vs TDD performance. TDD is the most efficient for data which is highly asymmetrical. Even then you have to decide on the ratio of dowload vs upload traffic and set your parameters accordingly. There is a way to dynamically allocate change the ratio between dowlink time slots and uplink time slots. There is a guard period (time slot) between your downlink and uplink to prevent interference. The guard time period changes with longer distances/propagation. So a longer guard period is needed at 700MHz than at 2.5GHz.
Last edited by bigsnake49; 05-13-2011 at 09:22 AM.
Phone fan
The lte chip set needs to be redone. It overheats the phone and drains the battery. I am more than happy with wimax until they fix that flaw.
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