Method and apparatus for transmitting or receiving paging in wireless communication system

A method of receiving a frame in a broadcast system, the method comprising:

• receiving a frame from a server over a heterogenous network based on a motion picture experts group (MPEG) media transport (MMT) protocol,
• wherein the frame comprises header information and multimedia data,
• wherein, the header information includes type information and delay sensitivity information in case that when the generated frame supports quality of service (QoS),
• wherein the type information identifies whether a bit rate is constant or not, and the delay sensitivity information indicates a delay sensitivity of the multimedia data, and
• wherein the type information and the delay sensitivity information are used for flow control over the heterogeneous network.