milan03
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Everything posted by milan03
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You could check the DEBUG LTE engineering mode. It'll show you the Band and DL channel, unless your Android 5.0 build specifically disallows it.
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I'm guessing 5MHz Band 2, right?
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The difference will be secured backhaul to those T-Mobile sites. That said, most of those rural GMO LTE/2G Only markets have plenty of AWS and/or PCS spectrum for an additional HSPA+ layer, but in order to rapidly overlay LTE by summer 2015, they're re-using the existing PCS (2G) antennas for 1900MHz Band 2 LTE for now, only upgrading the Base Stations and backhaul, and skipping HSPA+. The idea is to come back at the later time (after the LTE overlay has been fully completed), replace the tower top, and make further decisions based on the live marketplace analysis. At that time (most likely 2016-17) that could mean adding HSPA+, but it could also mean adding more LTE capacity and skipping HSPA+ altogether. We can only wait and see how well these rural sites perform. The bar has been set way too high in urban areas.
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In NY/NJ area, AT&T has 1900MHz Band 2 refarmed for 10MHz FDD LTE. 850Mz Band 5 is still used for UMTS transmission. In some areas they started aggregating B17+B2. Regardless of 20MHz aggregated FDD LTE spectrum, their LTE experience is by far some of the slowest throughout the entire NYC metro area. That is mainly due to oversold network, and inadequate backhaul provisioning.
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Yeah was just about to point out Cat 3 typo. Clearly it's a Cat 4 UE.
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Ah thanks for pointing that out. My bad.
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Is there a teardown available to confirm this? The FCC fillings confirm Cat 6 in two places. One under the UE Category, and two under the B41 CA combinations. I also thought that ALL Tier 1 US variants are Cat 4, but after looking at all of them, only Sprint variant is clearly labeled as Cat 6. All other ones are labeled as Cat 4, with 10+10 being max aggregation combo. *inconsistent screens removed*
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Actually, looking back at Note 4 fillings, seems like that one also supports 20+20MHz CA on TDD. Now, whether it's enabled by Sprint's firmware I'm not sure. The hardware is Cat 6.
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Actually, at this point in NYC they don't have to touch their Base Stations. It's the matter of remotely rearranging/refarming the spectrum, and remotely re-provisioning the backhaul, really fronting the bill to their backhaul providers.
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There isn't yet an universal agreement between the leading LTE operators, GSMA and 3GPP. At the moment it looks like GSMA is pushing for Local Breakout Routing, while Korean operators that actually have VoLTE roaming commercially deployed are siding with 3GPP's IMS Home Routing. By looking at Verizon/AT&T presser, it sure looks like they're aligning with GSMA and the LBO approach. LBO "Local Breakout" sends the signaling info back to home network, but the data session remains on the visited network. - It all has to be perfectly correlated, there are lots of moving parts, and it can easily get messy. - Benefit of LBO is lower cost due to less traffic for the roamers, lower latency. - Down side is administrative and billing coordination. Home Routing has both the signaling and data/media transported from visited network to home network. - This obviously introduces much more traffic between two networks, and increases the cost. - Since all traffic gets routed back to home network, the latency increases, and becomes hard for eSRVCC to achieve acceptable inter-continental performance. - And lastly, almost impossible emergency call and location due to everything being routed back to home network.
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First, I think all operators have to agree to which LTE roaming solution they're going to use. It's still a tossup between LBO Routing and IMS Home Routing roaming architectures. I have this strange feeling the duopoly will go the the "other" way, as soon as Sprint/T-Mobile and everyone else embraces the standard...
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That is absolutely wonderful news for Sprint subs! I have a feeling Note Edge is going to sell really well. I was under the impression that all Snapdragon 805 devices should naturally be paired with MDM9635, but I was wrong. Perhaps, I was deceived with early Note 4/LG G3 tech reviews of Korean variant, and iFixit teardown. US variants are definitely not loaded with MDM9635. Qualcomm has internal codenames for their Snapdragon 805 + modem solutions: - Fusion 4 = APQ8085 + MDM9x25 - Fusion 4.5 = APQ8085 + MDM9x35 Fusion 4.5 has been mainly used for Korean variants so far, and it looks like Galaxy Note Edge will be the first 300Mbps capable US variant.
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Not sure if it's been mentioned earlier, but Nexus 6 isn't a Cat 6 UE capable of 300Mbps. It's Cat 4 capable of 150Mbps, using Qualcomm's "Fusion 4" solution, leveraging APQ8084 + MDM9625. I was hoping that it's going to be a Cat 6, which would really benefit Sprint's subscribers more than anyone else, assuming that Sprint fulfills their promise, and actually launches 20+20MHz TDD LTE Carrier Aggregation markets this year..
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In this day and age it needs to be both.
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New York City market is also 15MHz "Wideband" LTE as of yesterday. But they've done it quite creatively. As a refresher, they hold C+D+E+F block AWS spectrum licenses in NYC. It used to be: - C Block = MetroPCS CDMA - D + E Block = 10MHz FDD LTE - F Block = HSPA+42 As of yesterday it's: - C Block = a lone CDMA carrier at the very bottom - the rest of C + D + E + F guard band = 15MHz FDD LTE (EARFCN: 2236) - F Block = HSPA+42 This is what a few quick 10MHz sweeps show: C + D block: LTE in E block biting into F, as the bottom guard band has been removed:
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Do you mind posting Service Cell Info page instead, assuming you're on B41? Thanks!
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According to Sprint's John Saw, their 8t8r deployment includes 4x2 MIMO for better cell edge performance. Was hoping your serving cell site is 8t8r since you're getting very nice peak speeds with fairly poor signal levels.
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Seems like Legere is into Marcello! 39:30min mark:
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What do you see in FieldTest under Serving Cell Info -> Number of Tx Antennas? Is it 2 or 4? That could finally be 8T8R in action!
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VoWiFi <-> VoLTE handoff works perfectly on iPhone 6 and 6 Plus. Seamless AMR-WB @23.85kbps experience on both bearers.
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It's the combination of older release equipment, coupled with poor installation and network planning. There is so much more, but here is some of the data from a third party research: http://www.signalsresearch.com/Docs/SRG%20Antenna%20Workshop%20Presentation.pdf
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4x2 MIMO was never in their phase 1 T-Mobile roadmap. Their goal was a quick and efficient rollout. Those 90+ lbs AIR21 antennas with integrated radios simply aren't 4x2 capable, but they're much easier to approve and install. Not much to do with RBS cabinets at this point in time. AIR32 antennas will be well over 150lbs, 4x2 MIMO capable and supposedly they're rolling them out in Q4 to sites that don't need structural upgrades. NSN Flexis on the other hand aren't integrated into the antennas, and can be attached at the tower top to capable 4x2 panels. The hardware fully supports 4x2 MIMO which is what T-Mobile has deployed in those markets. ALU LightRadio has been announced back in 2011, but it's been a "no show" for the majority of the phase 1 on all three major operators.
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No trolling from me. Was hoping for a constructive discussion. I guess that ain't happening today.
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Literally just found this video: http://www.ericsson.com/news/140924-t-mobile-expands-lte-network-coverage-and-capacity-with-ericssons-lte-advanced-technology_244099436_c "In this video, Ericsson chronicles the record-breaking deployment of the T-Mobile LTE network – growing the network from zero to 200 million covered LTE POPs in less than nine months. A key aspect behind the project’s deployment speed is the Ericsson AIR product, which combines the antenna and radio in one elegant package to deliver superior network performance. The result: T-Mobile has grown its subscriber base, revolutionized its high-speed data offerings for customers, and successfully repositioned the company as an industry innovator. Ericsson is proud to be selected for Phase II of T-Mobile’s network build."
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Where did I ever say that? Anyhow, if there is anyone with the knowledge on the issue and willing to educate me on the inner workings of Sprint/Ericsson dysfunctional relationship, I'm listening. Thanks.
