WAKE-UP SIGNAL FOR POWER SAVING
Systems, methods, and instrumentalities associated with wake-up signals may be provided, e.g., for power saving. The systems, methods, and instrumentalities may include interference-free wake-up signal (WUS)/go-to-sleep signal (GOS) and/or ON/OFF keying (OOK) waveform enhancements. The systems, methods, and instrumentalities for interference-free WUS/GOS may include wake-up control signal format and content and/or user multiplexing and reference symbols for WUS/GOS signaling. The systems, methods, and instrumentalities for OOK waveform enhancements may include one or more of uniform WUS/GUS using time domain masking based OOK, OOK randomization, and/or using orthogonal frequency division multiplexing (OFDM) symbols with multiple subcarrier spacing values for OOK symbols.
1 . A wireless transmit/receive unit (WTRU) comprising:
a processor configured to:
receive a signal from a network while the WTRU is in a sleep state;
detect first information indicated via the signal, wherein the first information comprises a bit pattern indicated by the signal;
determine whether the bit pattern matches a configured bit pattern that indicates to the WTRU to wake up from the sleep state;
determine second information associated with the signal, wherein the second information is different than the first information, and wherein the second information comprises a sequence associated with the bit pattern; and
on a condition that the bit pattern matches the configured bit pattern, wake up from the sleep state.
2 . The WTRU of claim 1 , wherein the signal is an on/off keying (OOK) signal, and the OOK signal comprises a set of OOK symbols using a set of orthogonal frequency division multiplexing (OFDM) symbols.
3 . The WTRU of claim 1 , wherein to detect the first information, the processor is configured to detect a set of on and off bits using energy detection.
4 . (canceled)
5 . The WTRU of claim 1 , wherein the second information comprises one or more of a WTRU group ID or a WTRU ID.
6 . The WTRU of claim 5 , wherein the processor is configured to:
determine that the signal is directed to the WTRU based the WTRU group ID or the WTRU ID matching to the WTRU.
7 . (canceled)
8 . A method comprising:
receiving a signal from a network while a wireless transmit/receive unit (WTRU) is in a sleep state;
detecting first information indicated via the signal, wherein the first information comprises a bit pattern indicated by the signal;
determining whether the bit pattern matches a configured bit pattern that indicates to the WTRU to wake up from the sleep state;
determining second information associated with the signal, wherein the second information is different than the first information, and wherein the second information comprises a sequence associated with the bit pattern; and
on a condition that the bit pattern matches the configured bit pattern, waking up from the sleep state.
9 . The method of claim 8 , wherein the signal is an on/off keying (OOK) signal, and the OOK signal comprises a set of OOK symbols using a set of orthogonal frequency division multiplexing (OFDM) symbols.
10 . The method of claim 8 , wherein to detect the first information, the method comprising:
detecting a set of on and off bits using energy detection.
11 . (canceled)
12 . The method of claim 8 , wherein the second information comprises one or more of a WTRU group ID or a WTRU ID.
13 . The method of claim 12 , the method comprising:
determining that the signal is directed to the WTRU based the WTRU group ID or the WTRU ID matching to the WTRU.
14 . (canceled)
15 . The WTRU of claim 1 , wherein the sequence associated with the bit pattern is associated with a bit in the bit pattern, and wherein a value of the bit is one.
16 . The method of claim 8 , wherein the sequence associated with the bit pattern is associated with a bit in the bit pattern, and wherein a value of the bit is one.