Yep the big three plus Huawei with a bit of an edge on them with te standard essential patent , that they collaborate in a pool with.Although in the matter of mobile modems/radios Qualcomm has an edge over all the others - not so much in the backend/longhaul telco space. Additionally if i recall most of the 6G stuff is being pushed by Huawei since most of it rests on the current 5G/5G+ work.