Activation and deactivation of configured grant
The pre-configuration of a grant of a non-active bandwidth part (BWP) or other wireless resource may be beneficial to reduce signaling overhead. A base station may not need to transmit a DCI to activate a configured grant if the configured grant on a non-active BWP is activated based on switching an active BWP to a pre-configured BWP. If a configured grant on a non-active BWP is activated, a base station may not need to transmit a DCI on a new active BWP for a resource grant. A wireless device may receive a DCI indicating a switch an active BWP from a first BWP to a second BWP for a particular cell. The configured grants may be type 1 grant-free transmission that may not need activation signaling. The activation and/or deactivation of the one or more configured grants may depend on the state of the second BWP.
1. A method comprising:
receiving, by a wireless device from a base station, at least one message comprising:
first configuration parameters of a first bandwidth part and of a second bandwidth part; and
second configuration parameters of a configured grant of the first bandwidth part, wherein the second configuration parameters comprise an indication of radio resources of the configured grant of the first bandwidth part;
determining to switch from the second bandwidth part to the first bandwidth part as an active bandwidth part;
based on the determining to switch, activating the first bandwidth part;
based on the activating the first bandwidth part, activating the configured grant according to the second configuration parameters; and
transmitting one or more transport blocks via the radio resources.
2. The method of claim 1 , further comprising:
activating the second bandwidth part as the active bandwidth part; and
starting, based on a timer value and the activating the second bandwidth part, a bandwidth part inactivity timer.
3. The method of claim 1 , further comprising receiving downlink control information comprising:
a bandwidth part identifier indicating the first bandwidth part.
4. The method of claim 3 , wherein the downlink control information comprises at least one of:
an uplink grant;
an uplink grant indicating one or more radio resources of the first bandwidth part; or a downlink assignment.
5. The method of claim 3 , wherein the bandwidth part identifier indicates a downlink bandwidth part that is paired with the first bandwidth part.
6. The method of claim 1 , wherein the determining to switch is based on receiving downlink control information.
7. The method of claim 1 , wherein the configured grant is a configured grant Type 1.
8. The method of claim 1 , wherein the first configuration parameters indicate at least one of:
a subcarrier spacing,
a cyclic prefix,
a quantity of contiguous physical radio resource blocks, or an offset of a first PRB.
9. The method of claim 1 , wherein the second configuration parameters indicate at least one of:
a radio network temporary identifier,
a periodicity, or
an offset of a resource with respect to a first system frame number.
10. The method of claim 9 , wherein the first system frame number is zero.
11. The method of claim 1 , wherein the at least one message comprises one or more radio resource control (RRC) messages.
12. A method comprising:
receiving, by a wireless device from a base station, at least one message comprising:
first configuration parameters of a first bandwidth part and of a second bandwidth part, wherein the first configuration parameters comprise an indication of a timer value of a bandwidth part inactivity timer; and
second configuration parameters of a configured grant of the first bandwidth part, wherein the second configuration parameters comprise an indication of radio resources of the configured grant of the first bandwidth part;
activating the second bandwidth part as an active bandwidth part;
starting, based on the timer value and the activating the second bandwidth part, the bandwidth part inactivity timer;
determining to switch from the second bandwidth part to the first bandwidth part as the active bandwidth part;
based on the determining to switch, activating the first bandwidth part;
based on the activating the first bandwidth part, activating the configured grant according to the second configuration parameters; and
transmitting one or more transport blocks via the radio resources.
13. The method of claim 12 , wherein the first configuration parameters further indicate at least one of:
the first bandwidth part is a default bandwidth part; or
the first bandwidth part is an initial bandwidth part.
14. The method of claim 12 , wherein the determining to switch is based on an expiry of the bandwidth part inactivity timer.
15. The method of claim 12 , wherein the determining to switch is based on receiving downlink control information.
16. The method of claim 12 , wherein the at least one message comprises one or more radio resource control (RRC) messages.
17. A method comprising:
receiving, by a wireless device from a base station, at least one message comprising:
first configuration parameters of a first bandwidth part and of a second bandwidth part;
second configuration parameters of a configured grant of the first bandwidth part, wherein the second configuration parameters comprise an indication of radio resources of the configured grant of the first bandwidth part; and
third configuration parameters of a second configured grant of the second bandwidth part;
determining to switch from the second bandwidth part to the first bandwidth part as an active bandwidth part;
based on the determining to switch:
deactivating the second bandwidth part; and
activating the first bandwidth part;
based on the activating the first bandwidth part, activating the configured grant according to the second configuration parameters; and
transmitting one or more transport blocks via the radio resources.
18. The method of claim 17 , further comprising:
based on the deactivating the second bandwidth part, deactivating the second configured grant.
19. The method of claim 17 , wherein the third configuration parameters indicate at least one of:
a second radio network temporary identifier,
a second periodicity, or
a second offset of a second resource with respect to a second system frame number being zero.
20. The method of claim 17 , wherein the determining to switch is further based on comprising determining an expiry of a bandwidth part inactivity timer.
21. The method of claim 17 , wherein the at least one message comprises one or more radio resource control (RRC) messages.