3gpp specifications for g900, g1800, umts900, umts2100, lte2100. Please help to find

[bos1234]

Hi team,
Wondering if anyone can help me find the specs for the above technologies (g900, g1800, umts900, umts2100, lte2100. ).
I am looking for mainly downlink specs from base station to the ME. If anyone can provide the links from www.3gpp.org, it will be greatly appreciated