Receiver bandwidth adaptation
A receiver bandwidth adaptation for radio access technologies (RATs) may be for a New Radio (NR) or 5G flexible RAT. A WTRU control channel {e.g., receiver) bandwidth may change, for example, based on monitoring a downlink channel for an in indication using a bandwidth (BW) associated with a first BW configuration. The indication may include a signal to change the receiver BW. The WTRU may change the receiver BW associated with the first BW configuration to a second BW configuration when the WTRU receives the indication on a downlink (DL) channel. The WTRU may perform one or more measurements associated with the second BW configuration in response to the change of the receiver BW to the second BW configuration. The WTRU may transmit measurement information to a network entity. The WTRU may receive a DL transmission from the network using the second BW configuration.
1. A method implemented by a wireless transmit/receive unit (WTRU), the method comprising:
monitoring, using a first receiver bandwidth (BW), a downlink (DL) channel transmission for an indication to change the first receiver BW;
determining that the indication is received via the DL channel transmission from a network entity;
based on the determination that the indication is received via the DL channel transmission from the network entity, changing the first receiver BW to a second receiver BW;
performing a measurement associated with the second receiver BW in response to changing the first receiver BW to the second receiver BW;
transmitting measurement information associated with the second receiver BW to the network entity; and
receiving a DL transmission from the network entity using the second receiver BW.
2. The method of claim 1 , wherein the measurement information indicates an acknowledgement of the change in the first receiver BW by the WTRU, the acknowledgement comprising an implicit acknowledgement or an explicit acknowledgement.
3. The method of claim 1 , wherein the indication is comprised in DL control information received on a DL control channel.
4. The method of claim 1 , wherein the second receiver BW is associated with a wider bandwidth than the first receiver BW.
5. The method of claim 1 , wherein the first receiver BW allows the WTRU to perform a first reception using a less power than the WTRU to perform a second reception using the second receiver BW.
6. The method of claim 1 , wherein the measurement comprises one or more of a channel state information (CSI) measurement or a sounding signal measurement.
7. The method of claim 1 , further comprising:
changing the second receiver BW back to the first receiver BW after a period of inactivity with the second receiver BW.
8. A wireless transmit/receive unit (WTRU) comprising:
a processor configured to:
monitor, using a first receiver bandwidth (BW), a downlink (DL) channel transmission for an indication to change the first receiver BW;
determine that the indication is received via the DL channel transmission from a network entity;
based on the determination that the indication is received via the DL channel transmission from the network entity, change the first receiver BW to a second receiver BW;
perform a measurement associated with the second receiver BW in response to changing the first receiver BW to the second receiver BW;
transmit measurement information associated with the second receiver BW to the network entity; and
receive a DL transmission from the network entity using the second receiver BW.
9. The WTRU of claim 8 , wherein the measurement information indicates an acknowledgement of the change in the first receiver BW by the WTRU, and the acknowledgement comprises an implicit acknowledgement or an explicit acknowledgement.
10. The WTRU of claim 8 , wherein the indication is comprised in DL control information received on a DL control channel.
11. The WTRU of claim 8 , wherein the second receiver BW is associated with a wider bandwidth than the first receiver BW.
12. The WTRU of claim 8 , wherein the first receiver BW allows the WTRU to perform a first reception using a less power than the WTRU to perform a second reception using the second receiver BW.
13. The WTRU of claim 8 , wherein the measurement comprises one or more of a channel state information (CSI) measurement or a sounding signal measurement.
14. The WTRU of claim 8 , wherein the processor is further configured to:
change the second receiver BW back to the first receiver BW after a period of inactivity with the second receiver BW.
15. The method of claim 1 , wherein the method comprises:
receiving the indication in a downlink control indication (DCI) from the network entity.
16. The WTRU of claim 8 , wherein the processor is configured to:
receive the indication in a downlink control indication (DCI) from the network entity.
17. The method of claim 1 , wherein the first receiver BW is associated with a first BW configuration, and the second receiver BW is associated with a second BW configuration.
18. The WTRU of claim 8 , wherein the first receiver BW is associated with a first BW configuration, and the second receiver BW is associated with a second BW configuration.
19. The method of claim 7 , reapplying the first receiver BW after the period of inactivity with the second receiver BW comprises reapplying the first receiver BW after an expiration of an inactivity timer associated with the second receiver BW.
20. The WTRU of claim 14 , wherein the processor being configured to reapply the first receiver BW after the period of inactivity with the second receiver BW comprises the processor being configured to reapply the first receiver BW after an expiration of an inactivity timer associated with the second receiver BW.