Soviet Mobile ground control interception radars

During the latter half of cold war, the soviet airforces had the problems of

Fighters dependent of GCI

Fighters esp mig-21 and mig-29 short ranged

few AWACS

so did they develop any mobile GCI radars that could keep up with these fighters ? esp if they considered offensive operations and the frontal aviation fighters were supposed to keep pace with changing frontline ?

Thanks