Group common DCI for wireless resources
Systems, apparatuses, and methods are described for wireless communications. A base station may send, to a wireless device, one or more radio resource control messages comprising parameters for one or more bandwidth parts or other wireless resources. The base station may send, to the wireless device, downlink control information comprising one or more bandwidth part identifiers. The wireless device may switch, based on the downlink control information, from a first bandwidth part to a second bandwidth part.
1. A method comprising:
receiving, by a wireless device from a base station, at least one message comprising:
configuration parameters for a plurality of bandwidth parts of a cell; and
an index associated with the wireless device;
receiving, via a control channel of a first bandwidth part, downlink control information (DCI) comprising a plurality of bandwidth part identifiers;
determining, based on the index, a position of a first bandwidth part identifier in the DCI; and
switching from the first bandwidth part to a second bandwidth part indicated by the first bandwidth part identifier.
2. The method of claim 1 , wherein the switching is based on a determination that the first bandwidth part is different from the second bandwidth part.
3. The method of claim 1 , wherein a size of the DCI is predetermined or indicated in the at least one message.
4. The method of claim 1 , wherein the index comprises a value that is associated with only the wireless device, and wherein the index differs from each of a plurality of other indices each associated with one of a plurality of other wireless devices.
5. The method of claim 1 , wherein the at least one message further comprises a radio network identifier.
6. The method of claim 5 , wherein the DCI is scrambled by the radio network identifier.
7. The method of claim 1 , wherein the configuration parameters indicate:
a first subcarrier spacing of the first bandwidth part;
a first cyclic prefix of the first bandwidth part;
a first number of contiguous physical radio resource blocks of the first bandwidth part; and
a first offset of a first physical radio resource block of the contiguous physical radio resource blocks.
8. A method comprising:
receiving, by a wireless device from a base station, at least one message comprising:
configuration parameters for a plurality of bandwidth parts of a cell; and
an index associated with the wireless device;
receiving, via a control channel of a first bandwidth part, downlink control information (DCI) comprising a bandwidth part identifier and a plurality of indicators;
determining, based on the index, a position of a first indicator in the DCI; and
switching, based on the first indicator, from the first bandwidth part to a second bandwidth part indicated by the bandwidth part identifier.
9. The method of claim 8 , wherein the bandwidth part identifier indicates a third bandwidth part paired with the second bandwidth part.
10. The method of claim 8 , wherein the switching comprises deactivating the first bandwidth part.
11. The method of claim 8 , wherein the switching comprises activating the second bandwidth part.
12. The method of claim 8 , wherein the configuration parameters comprise a timer value of a second bandwidth part inactivity timer for the second bandwidth part, and wherein the method further comprises:
starting, based on the timer value and in response to the switching, the second bandwidth part inactivity timer.
13. The method of claim 12 , wherein the at least one message comprises an indication of a default bandwidth part, and wherein the method further comprises:
switching, in response to an expiry of the second bandwidth part inactivity timer, from the second bandwidth part to the default bandwidth part.
14. The method of claim 8 , wherein the plurality of indicators comprises a plurality of wireless device identifiers.
15. A method comprising:
receiving, by a wireless device from a base station, at least one message comprising:
configuration parameters for a plurality of bandwidth parts of a cell; and
a wireless device-specific identifier associated with the wireless device;
receiving, via a control channel of a first bandwidth part, downlink control information (DCI) comprising a plurality of bandwidth part fields, wherein at least one bandwidth part field, of the plurality of bandwidth part fields, comprises:
a wireless device identifier indicating the wireless device-specific identifier; and
a bandwidth part identifier;
determining, based on the wireless device identifier indicating the wireless device-specific identifier, the at least one bandwidth part field of the plurality of bandwidth part fields; and
switching from the first bandwidth part to a second bandwidth part indicated by the bandwidth part identifier of the at least one bandwidth part field.
16. The method of claim 15 , wherein the at least one message further comprises second configuration parameters of a configured grant of the first bandwidth part, and wherein the method further comprises clearing the configured grant after the switching.
17. The method of claim 15 , wherein the switching comprises reselecting the first bandwidth part based on a determination that the second bandwidth part is the same as the first bandwidth part.
18. The method of claim 15 , wherein the switching is a default bandwidth part switching from the first bandwidth part to the second bandwidth part.
19. The method of claim 15 , wherein the switching is an active bandwidth part switching from the first bandwidth part to the second bandwidth part.
20. The method of claim 15 , wherein the bandwidth part identifier comprises a field indicating whether the second bandwidth part is:
a default uplink bandwidth part; or
a default downlink bandwidth part.