Jump to content

Throughput of different bands


Recommended Posts

I was wondering about connection throughput. Will a 5x5 LTE connection in the 2.5Ghz band give faster throughput than the same link in the 1900 PCS band? And if the higher frequency gives more throughput how much higher is that throughput?

  • Like 1
Link to comment
Share on other sites

I was wondering about connection throughput. Will a 5x5 LTE connection in the 2.5Ghz band give faster throughput than the same link in the 1900 PCS band? And if the higher frequency gives more throughput how much higher is that throughput?

 

Higher frequency does not provide more or faster throughout for the same size channel, regardless whether it is 700MHz or 2600MHz.

 

What causes Clearwire's TD-LTE 2600 to be considerably faster than Sprint's LTE 1900 or LTE 800 is that it is being deployed in a 20MHz TDD channel, versus a 5MHz FDD channel.  And the reason why 2600 has more capacity than 800 is just simple because of site spacing is much tighter and wider channels.

 

Robert

Link to comment
Share on other sites

Higher frequency does not provide more or faster throughout for the same size channel, regardless whether it is 700MHz or 2600MHz.

 

What causes Clearwire's TD-LTE 2600 to be considerably faster than Sprint's LTE 1900 or LTE 800 is that it is being deployed in a 20MHz TDD channel, versus a 5MHz FDD channel.  And the reason why 2600 has more capacity than 800 is just simple because of site spacing is much tighter and wider channels.

 

Robert

Would you mind sharing the site spacing and channel width for 800, 1900 and 2500? Or provide a link. In the mean time i'll be diligently googleing for answers myself. Thanks.

Link to comment
Share on other sites

 

 

Higher frequency does not provide more or faster throughout for the same size channel, regardless whether it is 700MHz or 2600MHz.

 

What causes Clearwire's TD-LTE 2600 to be considerably faster than Sprint's LTE 1900 or LTE 800 is that it is being deployed in a 20MHz TDD channel, versus a 5MHz FDD channel. And the reason why 2600 has more capacity than 800 is just simple because of site spacing is much tighter and wider channels.

 

Robert

 

 

Would you mind sharing the site spacing and channel width for 800, 1900 and 2500? Or provide a link. In the mean time i'll be diligently googleing for answers myself. Thanks.

You won't find the answer of site spacing on any frequency as there are too many factors, terrain, site height, downtilt, antenna beamwidth, etc.

 

Digiblur is right. 2600 will max out around 5 miles, 1900 around 8-9 miles, 800 around 13-15 in flat, unobstructed, line of sight conditions with zero downtilt. However, every cell/sector is enginnered for capacity, terrain and physical obstructions and there is no typical size. The make them as large as they can realistically serve. Sometimes that is 2 blocks, sometimes it's more than 12 miles.

 

Robert from Note 2 using Tapatalk 4 Beta

 

 

  • Like 2
Link to comment
Share on other sites

How much of the 2500 spectrum does clearwire have?

 

Varies widely depending on region. Anywhere from  40 to over 100 mhz of BRS / EBS depending on local leases and ownership. Typically 40 mhz of BRS nationwide though (correct me AJ)..

Link to comment
Share on other sites

Higher frequency does not provide more or faster throughout for the same size channel, regardless whether it is 700MHz or 2600MHz.

 

What causes Clearwire's TD-LTE 2600 to be considerably faster than Sprint's LTE 1900 or LTE 800 is that it is being deployed in a 20MHz TDD channel, versus a 5MHz FDD channel.  And the reason why 2600 has more capacity than 800 is just simple because of site spacing is much tighter and wider channels.

 

Robert

 

 

In single antenna situations you are right. However higher frequencies can accomodate higher order MIMO that lower frequencies. 4x4 MIMO might not be possible at 700MHz but it is definitely possible at 2.5Ghz. Actually 8x4 is possible at 2.5GHz.

Link to comment
Share on other sites

In single antenna situations you are right. However higher frequencies can accomodate higher order MIMO that lower frequencies. 4x4 MIMO might not be possible at 700MHz but it is definitely possible at 2.5Ghz. Actually 8x4 is possible at 2.5GHz.

 

That is true, but when posters have to ask this question about higher frequency and greater capacity, I guarantee that they are not well versed in MIMO.  They are physics newbies.  So, we are talking about one spatial channel, which conforms to the Shannon capacity equation -- the entry image to all of my science/engineering focused articles.

 

http://s4gru.com/index.php?/blog/1/entry-347-whats-the-frequency-kenneth-interpreting-your-engineering-screen-part-two/

 

AJ

Link to comment
Share on other sites

That is true, but when posters have to ask this question about higher frequency and greater capacity, I guarantee that they are not well versed in MIMO.  They are physics newbies.  So, we are talking about one spatial channel, which conforms to the Shannon capacity equation -- the entry image to all of my science/engineering focused articles.

 

http://s4gru.com/index.php?/blog/1/entry-347-whats-the-frequency-kenneth-interpreting-your-engineering-screen-part-two/

 

AJ

 

Mostly my first question stemmed from a momentary lapse in brain function. I'm familiar with carrier aggregation and have actually read both of your "whats the frequency" posts. A question about those I have is that when I look at my EVDO engineering screen its showing that I'm on Band Class 3 and Channel 2262. What's Band Class 3? 

 

KWvEvha.png?1

Link to comment
Share on other sites

Yet again you have proven yourself a wizard in my eyes. Can you explain your impressive grasp of the situation?

 

The HTC One, sadly, has a broken EV-DO engineering screen.  My guess is that it is due to the loss of SVDO.  But CDMA1X and LTE engineering screens work properly.  So, the EV-DO engineering fields do not present valid data.  Band class 3, by the way, is limited to Japan.  And I trust that you are not in Japan.  Plus, the Sprint variant HTC One does not support band class 3 anyway.

 

AJ

Link to comment
Share on other sites

The HTC One, sadly, has a broken EV-DO engineering screen.  My guess is that it is due to the loss of SVDO.  But CDMA1X and LTE engineering screens work properly.  So, the EV-DO engineering fields do not present valid data.  Band class 3, by the way, is limited to Japan.  And I trust that you are not in Japan.  Plus, the Sprint variant HTC One does not support band class 3 anyway.

 

AJ

Funnily enough I looked up band 3 and saw that it was for Japan. So I assumed one of three things. 1) I messed up. 2) The phone messed up 3) I had teleported without my knowledge. Thanks for clearing stuff up. So MIMO will be workable within carrier bands. And if I'm not mistaken carrier aggregation is having MIMO using connections from separate bands?

  • Like 1
Link to comment
Share on other sites

So MIMO will be workable within carrier bands. And if I'm not mistaken carrier aggregation is having MIMO using connections from separate bands?

 

Carrier aggregation is using multiple bands yes, also keep in mind that aggregate air link backhaul should also be considered as this will bolster overall capacity especially for microwave sites.

Link to comment
Share on other sites

A little off topic, my apology in advance but is there a way to see the sid for LTE? My GS3 only shows the 1X sid regardless of where my LTE signal comes from. I use cdma field test to see the info.

 

Sent from my SPH-L710 using Tapatalk 2

 

 

Link to comment
Share on other sites

A little off topic, my apology in advance but is there a way to see the sid for LTE? My GS3 only shows the 1X sid regardless of where my LTE signal comes from. I use cdma field test to see the info.

 

Sent from my SPH-L710 using Tapatalk 2

 

 

There are no SIDs used, only mcc mnc for the US. You can see the site identity using the LTE engineering screens. Look at my signature for more info.

  • Like 1
Link to comment
Share on other sites

 

A little off topic, my apology in advance but is there a way to see the sid for LTE? My GS3 only shows the 1X sid regardless of where my LTE signal comes from. I use cdma field test to see the info.

 

 

 

Sent from my SPH-L710 using Tapatalk 2

 

 

 

There are no SIDs used, only mcc mnc for the US. You can see the site identity using the LTE engineering screens. Look at my signature for more info.

I looked at the engineering screen but had no clue what any of it meant. Thanks for the info

 

Right now I have 310 - 120

 

Sent from my SPH-L710 using Tapatalk 4 Beta

 

Link to comment
Share on other sites

 

 

 

A little off topic, my apology in advance but is there a way to see the sid for LTE? My GS3 only shows the 1X sid regardless of where my LTE signal comes from. I use cdma field test to see the info.

 

 

 

 

 

 

 

Sent from my SPH-L710 using Tapatalk 2

 

 

 

 

 

 

There are no SIDs used, only mcc mnc for the US. You can see the site identity using the LTE engineering screens. Look at my signature for more info.

I looked at the engineering screen but had no clue what any of it meant. Thanks for the info

 

 

 

Right now I have 310 - 120

 

 

 

Sent from my SPH-L710 using Tapatalk 4 Beta

 

 

That is the sprint ID. The serving cell will be the sector you are on.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • large.unreadcontent.png.6ef00db54e758d06

  • gallery_1_23_9202.png

  • Posts

    • Did my drive from PHX to SEA & got to experience the terribleness that is the totem lake area. Impressive, speed test didn't complete either time.
    • Weird that they'd go back to the Edge+. Would think they'd let folks use the S22 just like with Genesis. In other news, St. Louis has 10x10 n71 + n66 SDL live. A bit more info here:  
    • Wonder what other spectrum the auto industry can use, how much of the 5.9GHz was being used, and if 30MHz will be enough 20 or 30 years from now. The auto industry has had it for 20 years sure, but technology can move really slow.  It isn't good.  It isn't ready for real world applications. The hardware is too slow to be able to process enough reliable data. It is too expensive.  Etc. I would argue that we are just getting to the point where features that I would assume could use 5.9GHz are just now hitting mass market as the code is better, hardware is not only significantly faster but also cheaper. The baseline trim models still lack a lot of safety features but the next trim up usually comes with a bunch of goodies I'd assume could make use of 5.9GHz. Just imagine where we were in 2005, 2010, 2015.  Mostly just assumptions without enough knowledge of the spectrum use, so a hint of skepticism. With the what, 1.2GHz that opened up in the 6GHz range, getting 45MHz out of 5.9GHz is very meh.
    • Cool find! Been there since 2018 according to Cellmapper. The only other time I've seen them leave up a temp site like this for a long period of time was when a nearby site is temporarily inoperable like the one in Red Hook Houses. That doesn't seem to be the case here and it's pretty much a GMO site at this point. My best guess is that T-Mobile wanted to put a site there to fill in coverage but because it's on LGA's grounds getting the actual permission to do so is extremely complex so they worked out a deal with the Port Authority to put up a COW in the meantime.  
    • Would this be a T-Mobile COW outside LGA Terminal A? eNB 49106 seems to line up to its position, plus the arm for the trailer to hook onto a truck says T-Mobile. Here is the NYC streetcar view the image was pulled from.     For all the years I have been monitoring the DAS, I have never gotten -55 or better, even after passing by every antenna in a station that is deep enough to have 0 outside macros reaching in. The SNR is still 20+, so its probably designed that way on purpose.
  • Recently Browsing

    • No registered users viewing this page.
×
×
  • Create New...