Two-part wake-up signal
A wake-up signal includes a first part and a second part. The first part is related to a cell of a base station transmitting the wake-up signal and includes a synchronization signal for synchronizing a terminal with the base station. The second part is related to one or more terminals.
1. A method of operating a terminal, comprising:
receiving a first part of a wake-up signal from a base station, the first part being related to a cell associated with the base station,
based on a synchronization signal included in the first part of the wake-up signal: synchronizing the terminal with the base station, and
based on said synchronizing: selectively receiving a second part of the wake-up signal from the base station, the second part being related to the terminal,
wherein a cell identity of the cell is encoded into the synchronization signal.
2. The method of claim 1 ,
wherein the first part of the wake-up signal consists of the synchronization signal.
3. The method of claim 1 , further comprising:
based on a reference signal included in the first part of the wake-up signal: performing channel sensing of a channel between the base station and the terminal, and
depending on a result of said channel sensing: selectively receiving the second part of the wake-up signal.
4. The method of claim 3 , further comprising:
depending on at least one of said synchronizing and the result of said channel sensing: selectively receiving at least one periodically broadcasted further reference signal 2 not included in the wake-up signal.
5. The method of claim 1 ,
wherein the first part consists of a reference signal,
wherein the method further comprises:
based on the reference signal: performing channel sensing of a channel between the base station and the terminal and synchronizing the terminal with the base station, and
depending on a result of said channel sensing and based on said synchronizing: selectively receiving the second part of the wake-up signal.
6. The method of claim 1 , further comprising:
comparing a cell identity of the cell associated with the base station and included in the first part with a reference cell identity, and
depending on said comparing: selectively receiving the second part of the wake-up signal.
7. The method of claim 1 , further comprising:
transitioning a receiver of the terminal from an inactive state to an active state,
wherein the first part of the wake-up signal is received in response to said transitioning.
8. The method of claim 7 , further comprising:
not synchronizing with the base station between said transitioning of the receiver of the terminal from the inactive state to the active state and until said receiving of the first part of the wake-up signal.
9. A method of operating a base station of a network, comprising:
transmitting a first part of a wake-up signal and transmitting a second part of the wake-up signal, the first part being related to a cell associated with the base station and the second part being related to a terminal
wherein the first part of the wake-up signal includes a synchronization signal for synchronizing the terminal with the base station, and
wherein a cell identity of the cell is encoded into the synchronization signal.
10. The method of claim 9 , further comprising:
checking when downlink data is queued for transmission to the terminal,
wherein the second part of the wake-up signal is selectively transmitted based on said checking.
11. The method of claim 9 ,
wherein the first part is configured as a preamble of the second part.
12. The method of claim 9 ,
wherein the first part of the wake-up signal includes a reference signal for channel sensing of a channel between the base station and the terminal.
13. The method of claim 9 ,
wherein a time gap is arranged in-between the first part of the wake-up signal and the second part of the wake-up signal.
14. A terminal comprising control circuitry configured to perform:
receiving a first part of a wake-up signal from a base station, the first part being related to a cell associated with the base station;
based on a synchronization signal included in the first part of the wake-up signal: synchronizing the terminal with the base station, and
based on said synchronizing: selectively receiving a second part of the wake-up signal from the base station, the second part being related to the terminal;
wherein a cell identity of the cell is encoded into the synchronization signal.
15. A base station of a network, the base station comprising control circuitry configured to perform:
transmitting a first part of a wake-up signal and transmitting a second part of the wake-up signal, the first part being related to a cell associated with the base station and the second part being related to a terminal,
wherein the first part of the wake-up signal includes a synchronization signal for synchronizing the terminal with the base station, and
wherein a cell identity of the cell is encoded into the synchronization signal.