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S4GRU

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Posts posted by S4GRU

    WiMax & rain

    in WiMax

    Posted

    It's not a WiMax thing-- it's a 2.5 GHz thing. When you get above 2 GHz, you get close to a harmonic resonance of the hydrogen bonds in a water molecule-- this is why microwave ovens operate at 2.4 GHz. The dielectric heating effect at this frequency is highly effective on water molecules.

    The water molecules absorb some of the RF energy and reduce the propagation of the signal.

     

    And here I thought it was just a propagation issue. I love learning new stuff.

     

    Robert

    Galaxy Nexus pushed back to April 22?

    in General Topics

    Posted

    Hopefully that is true that it sticks with the 15th and that will definitely validate the nice info Robert has received.

     

    I still see it as validation either way...April 15th or 22nd. Scott, AJ and I saw the source info. We know it is legit from Sprint. So we know that if it ends up being the GNex on the 22nd, it's a slip. We see schedules slip for device releases all the time, especially from Verizon. To be on it by a week, that's accurate to me. And we called it before anyone else did.

     

    If the Viper holds the 15th, then I will be smiling from ear to ear. I feel pretty darn good, already. But I have to admit, I'd feel even better if it did come out on the 15th to corporate stores.

     

    I think Sprint will announce right after their HTC event this week. They don't want to upstage their HTC event.

     

    Robert

    • Like 2

    Galaxy Nexus pushed back to April 22?

    in General Topics

    Posted

    According to TheVerge, it looks like there is a flyer that has the release dates for the LG Viper and the Galaxy Nexus. The LG Viper is still staying put for Apr 15 but now the Galaxy Nexus is pushed back one week to Apr 22. I guess maybe Sprint thought they wanted to give the LG Viper at least a week head start to gain some sales. I don't think its going to make much of a difference given the popularity of the Galaxy Nexus.

     

    http://www.theverge....te-release-date

     

    I see this as corroboration of our articles. Awesome!!!

     

    Robert

    WiMax & rain

    in WiMax

    Posted

    Glad to know that rain won't affect LTE on 1900. Thanks! :)

     

    It will have some effect, especially the heaviest of storms. But not as bad as 2500/2600.

     

    Robert - Posted from my E4GT with ICS using Forum Runner

    WiMax & rain

    in WiMax

    Posted

    We haven't had any rain in Northern New Mexico since the week after Labor Day last September. :(

     

    Robert - Posted from my E4GT with ICS using Forum Runner

    WiMax & rain

    in WiMax

    Posted

    Heavy precipitation can degrade WiMax performance if it is solid between your device and the tower. But it isn't a WiMax thing so much as its a 2500/2600 thing.

     

    LTE on 1900 will be less affected. And on 800, minimally effected.

     

    Robert - Posted from my E4GT with ICS using Forum Runner

    • Like 3

    LOL does this look like a sprint tower? (img link)

    in Network, Network Vision/LTE Deployment

    Posted

     

    WOW thats a sprint tower!? I didnt know that! no the tower is down near 117 AKA Spencerville road.

     

    that tower as the picture shows is right next to the road and i could probbly get right next to it if i wanted to. as a matter of fact. i think i might take a tirip if a few minutes to take a look at it.

     

    On a side note how did you know that was a sprint tower? if you go to sprint's website and look at the local towers none of the towers near my town show up.

     

    The Sprint site network.sprint.com only shows towers that have recently received or in the near future will receive temporary performance upgrades in advance of Network Vision. So it does not show all their sites. Not even close.

     

    I have access to a database that includes all Sprint Network Vision sites. The information I provide came directly from Sprint and not a 3rd party website. S4GRU has posted many interactive site maps in our Sponsor section. And more are added every few days.

     

    Robert - Posted from my E4GT with ICS using Forum Runner

    • Like 2

    Comments related to the NV Running List Thread

    in Network, Network Vision/LTE Deployment

    Posted

    Most towers (outside of urban areas) will realistically only go about 5 miles on my maps. They may be capable of farther reach but they don't. Perhaps they are just set that way for performance reasons.

     

    Or perhaps it is just the handsets' date=' with their weaker transmission strength, that limits the distance. I have mobile broadband card users 10 miles from towers in "no service" areas but they are only able to connect because of external antennas/boosters.

     

    I understand that getting those RRUs up on the pole will allow for a longer "throw" at the same signal level. But wouldn't the handset limitation still apply meaning that the signal will be better at the same distance, but the overall possible distance from the tower would remain the same?[/quote']

     

    Your device is likely strong enough to permit you to use it outdoors at 10+ miles so long as the panels are aimed out that far, there are no physical obstructions (LOS) and the noise floor is low. I do it in New Mexico often while hiking.

     

    Downtilt is a huge factor. Downtilt in each sector is determined by RF Engineering in advance. Those panels are aimed at the ground. If you attached a string to the top of the panel at the degree of downtilt and ran that out, it would eventually run into the ground. Coverage beyond this string would be virtually nil.

     

    This is the case in most deployments. The downtilt is designed to intentionally engineer the cell size for maximum cell performance. However, in many rural places we have boomers which have minimal downtilt for the purposes of creating very large cells. In these cases, in ideal conditions and line of sight, thats where these weird long distance anomalies occur.

     

    Robert via NOVO7PALADIN Tablet using Forum Runner

    • Like 1

    Sprint forces shutdown of third party call center - 300 layoffs

    in General Topics

    Posted

     

    It would be better to have 100%' date=' but they need someone to tell people to take the battery out for 30 seconds and start the phone back up, I mean, that couldn't be in place of hold music as people were waiting for the CSR... LOL it really annoys me when you give the outsourced CSR a really technical description of the problem and because they don't see it in the index of their CSR handbook, the good old default "take the battery out"

     

    "One of your cell phone towers fell on my house and now I don't have service."

    "Uh, Sir, please take the battery out of your phone and wait 30 seconds to put it back in. Then start it up and tell me when it is back on."

    "OK, it is back on."

    "Is your problem with service fixed?"

    "No the tower is still on my house and I still don't have service because your tower fell on my house."

    "Um, hold on" (talks to the manager) "My manager says that there might be a problem with your handset."

    "No, as I said, there is a tower that fell on my house."

    "I'm going to transfer you to technical support for your handset problem."

     

    Call a US CSR,

    "One of your cell phone towers fell on my house and now I don't have service."

    "I am extremely sorry for the inconvenience. I am putting in a trouble ticket at your address and technicians will be dispatched to fix the problem."[/quote']

     

    I nearly choked on my coffee when I read this in bed this morning. My wife came running in and I read it to her in skit format. I even did my best Indian phone bank accent.

     

    Thanks for making my Saturday morning that much more entertaining.

     

    Robert - Posted from my E4GT with ICS using Forum Runner

    • Like 1

    Comments related to the NV Running List Thread

    in Network, Network Vision/LTE Deployment

    Posted

     

    The larger capacities are achieved through frequency (spectrum) sharing?

     

    I'm not sure I understand your question. However, if a site becomes capacity constrained, they can keep adding additional carriers with the licensed spectrum they have, until they run out.

     

    Once they run out of spectrum, they have two choices...1) buy or share spectrum with someone, or 2) add more sites and reduce the size of cells in affected areas.

     

    Robert - Posted from my E4GT with ICS using Forum Runner

    Comments related to the NV Running List Thread

    in Network, Network Vision/LTE Deployment

    Posted

    The distance PCS can travel is highly variable. It depends on height of the tower it is installed on and the down tilt. I can tell you based on my experience that on a 300' boomer with minimum downtilt that the signal can carry over 15 miles from the tower in wide open area without vegetation.

     

    However, creating very large cells can be very problematic and it has to be very lower usage area. Like rural highways.

     

    In most cases, PCS cells are designed where downtilt on the antennas reduces the size of the coverage area intentionally and gives a more concentrated signal. PCS cells are often 3mi to 7mi radius from the site location. In dense urban areas, they can be much smaller to allow for more capacity.

     

    In Network Vision, the increased efficiences of fiber cabling and remote RRU's will give up to a ~20% gain. So in any given spot you used to have a legacy signal, in that same spot your NV signal should be 20% stronger.

     

    Robert - Posted from my E4GT with ICS using Forum Runner

    • Like 1
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