But the table you shared above is just a mapping for types of the different SS sets and use cases.
It has nothing to do with the indexing (ID) of the SS.
The pagingSearchSpace IE can have all values {0,…, 39} (see 38.331 in PDCCH-ConfigCommon IE).
In case it has the index 0, one should simply follow the CSS configuration as given in table 10.1-1 in 38.213.
Maybe I am wrong?
These snap dosn’t convey the info you’re telling.
The conveyed info is “pagingSearchSpace will have the value of searchSpaceID and searchSpaceID can be 0 to Max-1”.
How do I co-relate?
The question was: could we use searchspaceID 0 for pagingSearchspace?
It seems yes according to my snapshot above.
So, searchspaceid 0 isn’t unqiue for sib1 only. We can use it for paging searchspace also… ?
Yes paging control info can come in searchspace id 0 same as sib1.
But this doesn’t mean paging is coming in Type0-PDCCH.
PDCCH type numbers and common search space id numbers are two different things.
See here please searchspace id (starts from 0) 
Does this means paging could come in searchspace id 0, doesn’t?
Yes, the doc and your statement is correct.
But searchspace id 0 and Type2-PDCCH are two different things.
searchspace id 0 dosent mean that Type0-PDCCH will be only mapped to it for SIB Decoding (SIB1).
See in this log. searchSpaceID 1 is mapped to searchSpaceOtherSystemInformation , pagingSearchSpace, ra-SearchSpace. All three have different search space type… Type0A-PDCCH for other SIB, Type2-PDCCH for paging and Type1-PDCCH for ra
As mentioned here above, searchspace id 0 can be only used for sib1. So this is not right, and can be also used for paging…
My question still remains: can we use searchspaceid 0 for paging and not only to be used for sib1?
In the image you showed that searchspaceid 1 is used for paging.
And searchspaceid 0 in your image photo I see its for sib1 as well.
Hi all…
I have found the mention of pagingSearchSpace=0 in 3gpp.
Source: https://www.etsi.org/deliver/etsi_ts/138300_138399/138304/16.01.00_60/ts_138304v160100p.pdf
