What is the current market size for Bluetooth units and what is the expected growth rate for Wi-Fi units relative to Bluetooth units in 2021? 
 answered to Matt as well. The category outside of the mobile and PC, whether it's Wi-Fi, whether it's Bluetooth, whether it's cellular IoT, we see a big momentum there. I mean tons of product coming very fast, I mean we -- all sort of product, if you go to Asia, I don't think of any -- I cannot think of any electronic products that doesn't found with connection with the Internet. So that's the excitement and that's what we are going to see a strong impact in the coming year.
The other category, of course, is the 5G base stations. Here, I think in China next year -- this year is going to be stronger, this is a flat and the second customer is coming out as well. What ahead of us and we don't see it -- we don't -- we cannot see it now, is the [Indecipherable] use cases of 5G. In the prepared remark, I mentioned private networks, you have so many manufacturing factories that are going into private network with the wrong cellular network secured and reliable in the small cells and Fixed Wireless Access. These are all designs that we see the rollout of this one, but when it's -- becomes real in those market could be this year or could be next year.
Suji Desilva -- Roth Capital -- Analyst
Okay. And then lastly, on the connectivity -- Go ahead. Sorry, Gideon.
Gideon Wertheizer -- Chief Executive Officer
[Indecipherable] is, when you go to small cells, private fixed wireless access speak about volume, speak about -- of the millions of the product.
Suji Desilva -- Roth Capital -- Analyst
Okay. Great. And then lastly on connectivity, Bluetooth is very strong over 500 million units last year, what's the expectation for Wi-Fi units relative to Bluetooth? Is it an order of magnitude lower with a higher ASP or kind of approach something like a Bluetooth size unit market, understanding the Wi-Fi TAM would be helpful?
Yaniv Arieli -- Chief Financial Officer
So Wi-Fi is a growing market for -- both for us and overall, the world as well and much more used and adopted these last couple of years than four, five years ago when we bought RivieraWaves back in 2014, nobody was using IP for Wi-Fi, it was just merchant chips at that time, and the whole this has completely changed with dozens of deals that we have signed six-fold unit growth in 2020. And I would add that to give you a list and your first question, what are some of the exciting opportunities, Wi-Fi unit growth in 2021 for sure needs to climb significantly with many more products that are out there.
Suji Desilva -- Roth Capital -- Analyst
Okay. Thanks, guys.
Yaniv Arieli -- Chief Financial Officer
Thank you, Suji.
Operator
And our next question will come Tavy Rosner with Barclays. Please go ahead.
Tavy Rosner -- Barclays -- Analyst
Hi. Thanks for taking my questions and congratulations on the strong results. I just wanted to get back to the guidance for 2021. Maybe I didn't hear properly but with regards to the royalty forecast, you mentioned that you guys are taking a wait and see approach because of some of the slowdown in the semi industry. I guess, do you have a way to normalize that assuming that there is a recovery sooner than expected or how meaningful would it be to your revenue forecast?
Yaniv Arieli -- Chief Financial Officer
Hi, Tavy. Good morning. So let me one thing, correct you, really important, the business slowdown in the semiconductor industry, the problem is the opposite. There is huge demand in the semiconductor industry all over the place and this what's causes the inventory issue, the lean inventories than [Phonetic] the long lead-times, the salary are thus fully utilized, it's a great prompt to have if you're in the semiconductor space, it's not great to be -- if you're an OEM and you need to get those chips and you need to build those cars and get them out the door, that's what the problem is, so eventually when there will be enough manufacturing capabilities that not demand to fulfill the demand, we should see both our customers ship more, for us to recognize more revenue on these royalties.
This is what we alluded to, you could see that many companies in th
 answered to Matt as well. The category outside of the mobile and PC, whether it's Wi-Fi, whether it's Bluetooth, whether it's cellular IoT, we see a big momentum there. I mean tons of product coming very fast, I mean we -- all sort of product, if you go to Asia, I don't think of any -- I cannot think of any electronic products that doesn't found with connection with the Internet. So that's the excitement and that's what we are going to see a strong impact in the coming year.
The other category, of course, is the 5G base stations. Here, I think in China next year -- this year is going to be stronger, this is a flat and the second customer is coming out as well. What ahead of us and we don't see it -- we don't -- we cannot see it now, is the [Indecipherable] use cases of 5G. In the prepared remark, I mentioned private networks, you have so many manufacturing factories that are going into private network with the wrong cellular network secured and reliable in the small cells and Fixed Wireless Access. These are all designs that we see the rollout of this one, but when it's -- becomes real in those market could be this year or could be next year.
Suji Desilva -- Roth Capital -- Analyst
Okay. And then lastly, on the connectivity -- Go ahead. Sorry, Gideon.
Gideon Wertheizer -- Chief Executive Officer
[Indecipherable] is, when you go to small cells, private fixed wireless access speak about volume, speak about -- of the millions of the product.
Suji Desilva -- Roth Capital -- Analyst
Okay. Great. And then lastly on connectivity, Bluetooth is very strong over 500 million units last year, what's the expectation for Wi-Fi units relative to Bluetooth? Is it an order of magnitude lower with a higher ASP or kind of approach something like a Bluetooth size unit market, understanding the Wi-Fi TAM would be helpful?
Yaniv Arieli -- Chief Financial Officer
 So Wi-Fi is a growing market for -- both for us and overall, the world as well and much more used and adopted these last couple of years than four, five years ago when we bought RivieraWaves back in 2014, nobody was using IP for Wi-Fi, it was just merchant chips at that time, and the whole this has completely changed with dozens of deals that we have signed six-fold unit growth in 2020. And I would add that to give you a list and your first question, what are some of the exciting opportunities, Wi-Fi unit growth in 2021 for sure needs to climb significantly with many more products that are out there.
Suji Desilva -- Roth Capital -- Analyst
Okay. Thanks, guys.
Yaniv Arieli -- Chief Financial Officer
Thank you, Suji.
Operator
And our next question will come Tavy Rosner with Barclays. Please go ahead.
Tavy Rosner -- Barclays -- Analyst
Hi. Thanks for taking my questions and congratulations on the strong results. I just wanted to get back to the guidance for 2021. Maybe I didn't hear properly but with regards to the royalty forecast, you mentioned that you guys are taking a wait and see approach because of some of the slowdown in the semi industry. I guess, do you have a way to normalize that assuming that there is a recovery sooner than expected or how meaningful would it be to your revenue forecast?
Yaniv Arieli -- Chief Financial Officer
Hi, Tavy. Good morning. So let me one thing, correct you, really important, the business slowdown in the semiconductor industry, the problem is the opposite. There is huge demand in the semiconductor industry all over the place and this what's causes the inventory issue, the lean inventories than [Phonetic] the long lead-times, the salary are thus fully utilized, it's a great prompt to have if you're in the semiconductor space, it's not great to be -- if you're an OEM and you need to get those chips and you need to build those cars and get them out the door, that's what the problem is, so eventually when there will be enough manufacturing capabilities that not demand to fulfill the demand, we should see both our customers ship more, for us to recognize more revenue on these royalties.
This is what we alluded to, you could see that many companies in th