You are super awesome. Your videos are very well articulated and explain even the most technical concepts in very simple ways with clear visualizations. Thank you so much for your videos.
Thank you for sharing your knowledge of the difference in the types of cell size and what they mainly used for. I became a subscriber. I will be looking for more content on this subject.
Hi Jason, that's not necessarily true. It depends on where the backhaul is coming from and what spectrum a small cell is using. If for some reason, the small cell doesn't have a backhaul and it uses the macro as a backhaul (this operation is called relay) then it will use the macro capacity. Think of it as redirecting the capacity from one place to another. This is not common. In some cases, the small cell uses the same spectrum as macro. Let's say that is a poor coverage in a building from macro outside. Here, you can use small cell with the same spectrum. There will be some areas where there will be interference. The macro/small cell will have to work out how to avoid interference (this feature is called eICIC) and there will be some loss of capacity on both the macro as well as small cell.
Thanks for the video. I have below questions. 1)what is the difference between the small cell and hENB(home enode-B gateway)? 2)Can small cell connect directly with the core network (MME in case of 4G as small cell has its own BBU) or it should connect to the macro cell and then the core network ? (I got this question when you explained different types of back-hauls)
Hi Shreyas. Home eNodeB gateway is used as an aggregator for Home eNodeBs or HeNBs or Small Cells. It's not strictly necessary as 4G small cells can connect directly to the core. The problem is that if there are too many of them, configuration for each of them becomes tedious and time consuming. HeNB-GW takes away that complexity. It also contains security gateway that makes connecting them more secure. Now, what we argue is that Small Cells are all in one unit, so BBU + RRU. In US, RRUs that are deployed on the lamp posts, etc. are known as Small cells too. Basically small cells are small form factors in the USA. This is where is becomes tricky as BBU would be close to the cell site, tower, lamp post, etc. or in case of C-RAN it's in a central BBU Hostel. Again, connecting to the core can be direct or via a separate gateway for security reasons. Many different options are available.
Great explanation, love how this one is... My question though is this.... if Service Provider A rents or buys a few macrocells in an area to spread coverage of one of their newly acquired frequencies... Do they have to report these rented locations to the FCC or some entity? How do they keep track of the "map" of coverage from new towers and cells? Likewise what happens if an owner of one of these buildings that the antenna are placed on, doesn't want to rent it out anymore, is there a database or something that will keep track of every cell site, specifying their exact operating frequencies?
We don't think they have to report to regulator as they have purchased the spectrum. There are departments within the organisation who keeps track of all macro/small cells, cell id's, frequencies, etc. Sites go up and come down all the time so not an issues. Many other public organisations and hobbyists also maintain databases. Cell Mapper is one good app in the UK, assuming it's available in the US too. If you have an android phone, you should be able to download it (if available).
No phones can act as small (femto) cells. In theory this is not difficult to do from technology point of view but it would be a nightmare managing interference. So you will most likely never see one.
This is a very good intro to mid depth level information for a complex topic .... kudos to you
Great video! Learning through a well explained video is much faster than reading a piece of text again and again. Thanks!
Very insightful and easy to understand, thanks a lot!
You are super awesome. Your videos are very well articulated and explain even the most technical concepts in very simple ways with clear visualizations. Thank you so much for your videos.
Greetings from finland! i study ict and this was very helpful
Thank You for the introduction to Small Cells
Great presentation, very informative!
Very informative. Thank you.
This is really informative, you put lots of efforts making it easy for beginners, Thanks
Thanks for the appreciation. Please help promote the channel.
I'm clearly with your description. thank you so much
Thank you for sharing your knowledge of the difference in the types of cell size and what they mainly used for. I became a subscriber. I will be looking for more content on this subject.
very good introduction into small cells...planning to go to a RF engineering career.
Your marvelous job helped me in preparation for an interview.. our hero keep it up in future too..
Your video is incredible. Just subscribed and bookmarked your page.
Thanks for the fantastic feedback. It keeps us going.
Great video as always. Keep up with this good job!! :)
Hello, could you explain how/why small cells make use of the macro capacity?
Hi Jason, that's not necessarily true. It depends on where the backhaul is coming from and what spectrum a small cell is using. If for some reason, the small cell doesn't have a backhaul and it uses the macro as a backhaul (this operation is called relay) then it will use the macro capacity. Think of it as redirecting the capacity from one place to another. This is not common. In some cases, the small cell uses the same spectrum as macro. Let's say that is a poor coverage in a building from macro outside. Here, you can use small cell with the same spectrum. There will be some areas where there will be interference. The macro/small cell will have to work out how to avoid interference (this feature is called eICIC) and there will be some loss of capacity on both the macro as well as small cell.
Thanks for the great video. I have not seen many small cells using a xDSL backhaul. Wouldn't PoE be a more common backhaul?
Only residential (and maybe enterprise) Femtos use xDSL.
Great presentation of the theme which i am learning now. Thanks. Can i contact you somehow? I have an idea, wanted to discuss it with you
Thanks for the video. I have below questions.
1)what is the difference between the small cell and hENB(home enode-B gateway)?
2)Can small cell connect directly with the core network (MME in case of 4G as small cell has its own BBU) or it should connect to the macro cell and then the core network ? (I got this question when you explained different types of back-hauls)
Hi Shreyas. Home eNodeB gateway is used as an aggregator for Home eNodeBs or HeNBs or Small Cells. It's not strictly necessary as 4G small cells can connect directly to the core. The problem is that if there are too many of them, configuration for each of them becomes tedious and time consuming. HeNB-GW takes away that complexity. It also contains security gateway that makes connecting them more secure.
Now, what we argue is that Small Cells are all in one unit, so BBU + RRU. In US, RRUs that are deployed on the lamp posts, etc. are known as Small cells too. Basically small cells are small form factors in the USA. This is where is becomes tricky as BBU would be close to the cell site, tower, lamp post, etc. or in case of C-RAN it's in a central BBU Hostel. Again, connecting to the core can be direct or via a separate gateway for security reasons. Many different options are available.
@@3G4G5G Thanks for the explanation and details.
Great explanation, love how this one is... My question though is this.... if Service Provider A rents or buys a few macrocells in an area to spread coverage of one of their newly acquired frequencies... Do they have to report these rented locations to the FCC or some entity? How do they keep track of the "map" of coverage from new towers and cells? Likewise what happens if an owner of one of these buildings that the antenna are placed on, doesn't want to rent it out anymore, is there a database or something that will keep track of every cell site, specifying their exact operating frequencies?
We don't think they have to report to regulator as they have purchased the spectrum. There are departments within the organisation who keeps track of all macro/small cells, cell id's, frequencies, etc. Sites go up and come down all the time so not an issues. Many other public organisations and hobbyists also maintain databases. Cell Mapper is one good app in the UK, assuming it's available in the US too. If you have an android phone, you should be able to download it (if available).
Can 5G enabled phones act as small (femto) cells?
No phones can act as small (femto) cells. In theory this is not difficult to do from technology point of view but it would be a nightmare managing interference. So you will most likely never see one.
@@3G4G5G Thank you very much for your prompt response & a great video
@3G4G Hi,I am getting an error while playing this video.
Thanks for letting us know. We will try and find out soon.
Hoping you will resolve it soon
@@arshadullakhan7335 It should be working now, please check
Yes thank you so much ☺️
Thankyou for valuable content