Conan Kudo
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Everything posted by Conan Kudo
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For Sprint's Samsung Galaxy Note 3, one is the loneliest number
Conan Kudo commented on WiWavelength's blog entry in The Wall
That's not fair, A.J. You know as well as I do that the reason Sprint "tri-band" devices can't support it is because LTE TDD bands require a separate antenna output from LTE FDD. All "tri-band" devices have dual-mode LTE. They support all of them with one path, but because LTE TDD differs substantially in air interface design from LTE FDD (obviously), it has its own antenna block on devices. That means that the antenna block previously reserved for CDMA2000 has to be replaced with LTE TDD. That's why SV-LTE cannot be enabled on Sprint "tri-band" devices. The R4 model can support it because LTE TDD isn't on the device. That extra antenna block can be used for CDMA2000 instead. -
That network performance is enabled by good wireline connections. Someone should bring that to people as home broadband.
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Well, Sprint doesn't own the licenses between Cellular and ISM. Those are owned by Aircell (who does business as Gogo), used specifically for ATG operations. As for ISM, the main issue isn't "wideband", but tolerance. The network technology must be very resilient against interference in order to be classified as an ISM-usable technology. That spectrum is shared with licensed and unlicensed users, and all must accept interference and adjust accordingly.
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US/Mexico 800 MHz reband plan going to take 30 months??
Conan Kudo replied to ericdabbs's topic in General Topics
What's more disappointing is that Sprint may not be able to use it anyway. The U.S.-Mexico shared block is the only part of that band that their current RRHs support. The U.S. block at 806-812.25 / 851-857.25 MHz will not be usable for Sprint's network. Unless that block is intended for federally owned systems? -
How well does that work? I've heard quite a few stories and read a few journal papers about the tech, but I'd rather hear about some empirical results...
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Well, if there're no ill effects, then my next question is, how are you providing wireless broadband service over it? Are you using LTE, WiMAX, or something else?
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Well, there's no LTE band for ISM 900. And of course, only LTE TDD could run on it. No one particularly wants to define an ISM 900 band for LTE, given how complex it is to use for such a network... There's a band that covers 3.6-3.8GHz, which is Band 43.
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Septi-band (850/900/AWS/1900/2600/3500) or bust! Are you talking about ISM 900 (902-928 MHz) or EGSM band (880-915 / 925-960 MHz)? And when you say "3600", you're referring to 3.4-3.6 GHz band or the 3.6-3.8 GHz band?
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This is why common frequency numbers cause way too much confusion... The Note 10.1 2014 edition (LTE version) supports the following: GSM 850/900/1800/1900 UMTS HSPA+42 850/900/1900/2100 (Bands V, VIII, II, I) LTE 800/850/900/1800/2100/2600 (Bands 20, 5, 8, 3, 1, 7) Unless you specifically see a device say it supports Bands 25, 26, and 41, it won't work with Sprint. And even then, Sprint won't let you use your own device anyway. So it is pointless unless a Sprint-branded model arrives.
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CSE == Computer Science and Engineering. CSE covers software engineering, computer engineering, computer science, computer (IP/TDM) networks, etc.
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I wonder why Apple didn't just rationalize to one model set for the US, since one is a superset of the other. Same for EU and MENA ones.
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The renumbering would likely only affect LTE TDD bands, as they would probably get pushed down to the 60s.
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There are a few reserved band numbers in place already, such as 15 and 16. However, devices don't strictly use band numbers. They rely on {U,E}ARFCNs, which band numbers are merely a construct of {U,E}ARFCN groups for frequencies. Renumbering is certainly possible, and increasingly likely, too.
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With the current gear, that is not possible. The only way for Sprint to go to 10 MHz FDD with G+H is to upgrade the radio hardware (or get brand new radio hardware) to support the "multiple frequency band indicator" (otherwise known as MFBI) feature that allows Sprint to declare 5 MHz FDD for Band 25 and 10 MHz FDD for a newly defined extended PCS A-H band. Existing devices with Band 25 will only see 5 MHz FDD until the end of their days. Devices with the new band will support 10 MHz FDD with G+H.
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Typically, an Electrical Engineering degree with a specialization in RF is involved, but any CSE degree will work, provided you've got certification and other credentials for RF and network planning. There are many specialty courses that teach those things (some of them provided by network infrastructure vendors), and it is a matter of proving that you've got the skill to take on the job. Some universities actually have RF engineering sub-majors for a Bachelor's degree, but the vast majority do not. Most people I know do specialization in RF as a Master's concentration instead.
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RT @StevenJCrowley: "If the Courts Do Not Recognize Technology Neutrality in the Wiretap Act, Congress Should Intervene" http://t.co/SWTrFy…
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Yep. It was upheld by the courts, so it is valid. It went into full effect in January.
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When you are forced to rely on a cash cow, you have admitted that Wall St controls your company, not your executives, IMO.
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SouthernLINC Selects Ericsson, Cisco for LTE Network to Replace iDEN
Conan Kudo replied to Rawvega's topic in General Topics
It is the ESMR band. That's why construction won't begin for two years. The plan is to get people onto iDEN/GSM/UMTS or GSM/UMTS phones using the T-Mobile network as quickly as possible. Then they can gradually deploy the gear to iDEN sites and then shutdown iDEN and replace it with LTE on a market-by-market basis. The plan is to move to GSM/UMTS/LTE handsets that will support the ESMR band for LTE. This ecosystem is going to be driven by Nextel in Latin America, principally. -
Actually, yes they are. The FCC's data roaming mandate requires them to do so on fair terms for all parties involved. Admittedly, what is "fair" isn't well defined, but it is clear that LTE is included in that mandate.
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Woo! The company I work for (@CamgianMicro) finally put up its new website, and it's a beaut! http://t.co/ucYz6O5JIw
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RT @southernlinc: SouthernLINC Wireless Announces Plans to Build Regional 4G LTE Network for Southern Company Utilities. http://t.co/zYb6oz…
