Jump to content

  •  

Photo

LTE-A Component Carriers sizing and LTE Band Blocks


  • Please log in to reply
6 replies to this topic

#1 nephipower

nephipower

    Member Level: Smoke Signals

  • S4GRU Member
  • 3 posts
  • Phones/Devices:iPhone 7
  • LocationSan Antonio

Posted 18 March 2017 - 01:49 PM

LTE Advanced (LTE-A) is able to provide faster speeds by using carrier aggregation which combines different LTE Component Carriers (CC). This article gives the basics for how it works.

 
 
As you can see by this image in the article there can be different combinations of contiguous or non-contiguous CCs.
 
 
What I am trying to better understand how is the component carrier size is determined inside a LTE band if a carrier is licensed for some contiguous and non-contiguous blocks within a band. It is very common in a market for a carrier to have different Blocks of an LTE band.
 
For example, lets assume in a city a carrier is licensed for AWS3 Blocks G, H and J. Using the chart below you can see that Blocks G & H are contiguous spectrum and there is a gap between Block H and J.
 
 
So for carrier aggregation would Blocks G & H be considered 1 component carrier (CC) and Block J would be 1 CC?
 
Or would Blocks G, H, and J be considered 1 CC even though there is a gap between H & J?

 



#2 lilotimz

lilotimz

    S4GRU Moderator

  • S4GRU Staff
  • 8,476 posts
  • Phones/Devices:Pixel 5", Nexus 7 (2013) & 9 (2014), 3x SGS7, iPad Air 2
  • LocationSacramento, CA, USA

Posted 18 March 2017 - 02:57 PM

 

L

 

 

Every on air LTE carrier is considered a component carrier if they're aggregated. It does not matter what spectrum it uses or how much bandwidth it encompasses. 



#3 nephipower

nephipower

    Member Level: Smoke Signals

  • S4GRU Member
  • 3 posts
  • Phones/Devices:iPhone 7
  • LocationSan Antonio

Posted 18 March 2017 - 03:04 PM

Every on air LTE carrier is considered a component carrier if they're aggregated. It does not matter what spectrum it uses or how much bandwidth it encompasses. 

 

 

I don't understand what your response is really answering. That seems like a vague statement.

 

Define what you mean when you say "LTE carrier"?

 

Basically the whole point of my post was to help understand the definition of LTE component carrier since in all my searching online I couldn't find out a definition of that in relation to LTE Band Blocks.



#4 lilotimz

lilotimz

    S4GRU Moderator

  • S4GRU Staff
  • 8,476 posts
  • Phones/Devices:Pixel 5", Nexus 7 (2013) & 9 (2014), 3x SGS7, iPad Air 2
  • LocationSacramento, CA, USA

Posted 18 March 2017 - 03:18 PM

I don't understand what your response is really answering. That seems like a vague statement.

 

Define what you mean when you say "LTE carrier"?

 

Basically the whole point of my post was to help understand the definition of LTE component carrier since in all my searching online I couldn't find out a definition of that in relation to LTE Band Blocks.

 

Because you're overthinking this.

 

A component carrier is a LTE carrier that is aggregated with another. Again, what spectrum it uses (AWS1/PCS/CLR850/700 etc etc) does not matter. 

 

Interband carrier aggregation aggregates two LTE carriers from two different frequencies (ie PCS B2 or AWS1- B4) with one being designated by the eNB as the PCC and one as the SCC. 

 

Intraband carrier aggregation can come in two forms.

 

One is contiguous where the spectrum available to use exceeds the 3GPP LTE carrier size bandwidths of 1.4/3/5/10/15/20 MHz such as Sprint who in many places have up to 60 MHz of spectrum available in the 2.5 GHz frequencies. There is no standard to allow 60 MHz LTE carriers so the best way to utilize all the spectrum is to fire up 3 individual 20 MHz LTE carriers and aggregate them. These three LTE carriers are then component carriers when aggregated with each other with one being the primary (PCC) and the other two being the secondary (SCC). 

 

The other is intraband non contiguous where the LTE carriers is within the same band say LTE B2 but there's a gap in licensed frequencies such as being licensed 20 MHz (10x10) of PCS A block and 10 MHz (5x5) of PCS C block. Using carrier aggregation, the two LTE carriers can be aggregated and are called component carriers. 



#5 nephipower

nephipower

    Member Level: Smoke Signals

  • S4GRU Member
  • 3 posts
  • Phones/Devices:iPhone 7
  • LocationSan Antonio

Posted 18 March 2017 - 04:10 PM

Ah ok, that makes more sense now. The reason I am asking about these questions is so I can figure out how many component carriers exist in my city. Then I can see how much more potential there is for increased speeds in areas once 4CA becomes available in UE and carriers.

 

So based upon my example above since it would be intraband non-contiguous it would be 2 CC.

 

Thank you for explaining things.



#6 Tengen31

Tengen31

    Member Level: eHRPD

  • S4GRU Premier Sponsor
  • PipPipPip
  • 770 posts
  • Phones/Devices:htc a9 HTC EVO 3D, Galaxy Victory,iPad and galaxy s3, galaxy S5
  • LocationMinnesota

Posted 18 March 2017 - 09:06 PM

Ah ok, that makes more sense now. The reason I am asking about these questions is so I can figure out how many component carriers exist in my city. Then I can see how much more potential there is for increased speeds in areas once 4CA becomes available in UE and carriers.

So based upon my example above since it would be intraband non-contiguous it would be 2 CC.

Thank you for explaining things.

4xca is on the list of plans for the companies. However att is the only one that can do as alot of cities they have 5 band Deployed. VZW could do it when the reframe 850 MHz to B5. Sprint could with a 4th B41 or if they did it with the current 3 carriers then added B25 on to it.

Sent from my 2PQ93 using Tapatalk

#7 dkyeager

dkyeager

    Member Level: LTE Advanced

  • S4GRU Premier Sponsor
  • PipPipPipPipPipPip
  • 5,991 posts
  • Phones/Devices:LG V20, MVNO G2s & Photon 4G, accessories, airave, use other phones/tablets
  • LocationColumbus, OH, USA

Posted 19 March 2017 - 05:04 AM

Don't forget Sprint is also testing in the field CA 25 which could be used just with on b25 for greater speeds benefiting the edge. Unfortunately, we have not found it yet.

Sent from my LG-LS980 using Tapatalk




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users