Abstract: The present disclosure relates to a pre-5G or 5G communication system to be provided for supporting higher data rates beyond 4G communication system such as LTE. A method for switching from a first data transmission mode to a second data transmission mode comprising a NG-RAN node, a core node and a content provider, wherein method comprises transmitting, by NG-RAN node, first data from content provider to a UE according to first data transmission mode in a first session; deciding, by UE or NG-RAN node or core node or content provider, to switch from first data transmission mode to second data transmission mode; initializing, by core node, a second session for second data transmission mode; switching, by core node, from first data transmission mode to second data transmission mode; and transmitting, by NG-RAN node, second data from content provider to UE according to second data transmission mode in second session.

Abstract: A Random Access method in a telecommunication system, includes the steps of: receiving two or more identical preambles transmitted from two or more User Equipments (UEs), respectively; determining a minimum difference between the two or more identical preambles in a given domain; transmitting a response message to each of the two or more UEs; and receiving a connection setup message using information included in the respective response messages transmitted to each of the two or more UEs.

Abstract: A Random Access method in a telecommunication system, includes the steps of: receiving two or more identical preambles transmitted from two or more User Equipments (UEs), respectively; determining a minimum difference between the two or more identical preambles in a given domain; transmitting a response message to each of the two or more UEs; and receiving a connection setup message using information included in the respective response messages transmitted to each of the two or more UEs.