Method and apparatus for wake-up signals

An apparatus comprising:

• a processor that determines a first time slot and a first frequency location for a first wake up signal;
• and
• a receiver that receive the first wake up signal starting from the first time slot and the first frequency location;
• wherein the first wake up signal is associated with a paging message and ends at a second time slot minus one with a first maximal duration;
• wherein a first time offset of the second time slot and a start of a time slot of the paging message is determined by at least one of:
• a second time offset of the second time slot to a third time slot for a second wake up signal;
• a second maximal duration of the second wake up signal;
• a presence of the second wake up signal;
• and
• a paged group number associated with the paging message;
• wherein the receiver further receives the paging message.

A method comprising:

• determining, by a processor, a first time slot and a first frequency location for a first wake up signal;
• transmitting, by a transmitter, the first wake up signal starting from the first time slot and the first frequency location;
• and
• transmitting, by the transmitter, the paging message;
• wherein the first wake up signal is associated with a paging message and ends at a second time slot minus one with a first maximal duration;
• wherein a first time offset of the second time slot and a start of a time slot of the paging message is determined by at least one of:
• a second time offset of the second time slot to a third time slot for a second wake up signal;
• a second maximal duration of the second wake up signal;
• a presence of the second wake up signal;
• and
• a paged group number associated with the paging message.

A method comprising:

• determining, by a processor, a first time slot and a first frequency location for a first wake up signal;
• receiving, by a receiver, the first wake up signal starting from the first time slot and the first frequency location;
• and
• receiving, by the receiver, the paging message;
• wherein the first wake up signal is associated with a paging message and ends at a second time slot minus one with a first maximal duration;
• wherein a first time offset of the second time slot and a start of a time slot of the paging message is determined by at least one of:
• a second time offset of the second time slot to a third time slot for a second wake up signal;
• a second maximal duration of the second wake up signal;
• a presence of the second wake up signal;
• and
• a paged group number associated with the paging message.