Broadcast signal frame generation device and broadcast signal frame generation method using bootstrap including symbol for signaling BICM mode of preamble and OFDM parameter together

A broadcast signal reception method of transmitting a broadcast signal, comprising:

• generating a received signal corresponding to a broadcast signal frame, the broadcast signal frame including a bootstrap and a preamble;
• and
• performing time deinterleaving on the received signal transmitting the broadcast signal corresponding to the broadcast signal frame,
• wherein the bootstrap includes a symbol for that simultaneously signals both signaling a signaling protection mode of L1-Basic of the preamble BICM mode and OFDM parameters of L1-Basic, together. of at least a part of the preamble,
• the symbol corresponding to a multi-bit signaling field for representing a preamble structure, and
• wherein the bootstrap is located at the beginning of the broadcast signal frame and corresponds to a data unit used for restoring the preamble.