Telecom regulator TRAI today said it would come out with a consultation paper on fourth generation mobile (4G) services by the middle of this year. The fourth generation or 4G technology offers download at faster speed known as ultra-broadband and high definition video on demand among other such services. Speaking to reporters on sidelines of a function, TRAI Chairman J S Sarma said the Regulator would look into the various aspects, including spectrum band to be allotted for 4G service .4G aims to provide a wide range of data rates up to ultra-broadband (gigabit-speed) Internet access to mobile as well as stationary users.