Bandwidth part and uplink carrier switching
A wireless device receives first configuration parameters of a first bandwidth part and a second bandwidth part of a licensed cell; and second configuration parameters of a third bandwidth part and a fourth bandwidth part of an unlicensed cell. A first downlink control information indicating switching from the first bandwidth part to the second bandwidth part as an active bandwidth part is received. A second downlink control information indicating switching from the third bandwidth part to the fourth bandwidth part as an active bandwidth part is received. Based on the receiving the first downlink control information: the wireless device switches from the first bandwidth part to the second bandwidth part; and does not transmit a confirmation. Based on the receiving the second downlink control information, the wireless device switches from the third bandwidth part to the fourth bandwidth part; and transmits a confirmation.
1. A method comprising:
receiving, by a wireless device:
first configuration parameters of a first bandwidth part and a second bandwidth part of a licensed cell; and
second configuration parameters of a third bandwidth part and a fourth bandwidth part of an unlicensed cell;
receiving a first downlink control information indicating switching from the first bandwidth part to the second bandwidth part as an active bandwidth part;
receiving a second downlink control information indicating switching from the third bandwidth part to the fourth bandwidth part as an active bandwidth part;
determining whether to transmit a confirmation for bandwidth part switching based on the bandwidth part switching being for the licensed cell or the unlicensed cell;
based on determining that the first downlink control information is for the licensed cell:
switching from the first bandwidth part to the second bandwidth part; and
not transmitting a confirmation; and
based on determining that the second downlink control information is for the unlicensed cell:
switching from the third bandwidth part to the fourth bandwidth part; and
transmitting a confirmation.
2. The method of claim 1 , wherein the confirmation is a medium access control (MAC) control element.
3. The method of claim 2 , wherein the transmitting the confirmation is via an uplink data channel.
4. The method of claim 2 , wherein the confirmation comprises a first identifier of the third bandwidth part and a second identifier of the fourth bandwidth part.
5. The method of claim 2 , wherein the first downlink control information indicates an uplink grant for transmission of one or more transport blocks via the second bandwidth part.
6. The method of claim 2 , wherein the first downlink control information indicates an order for a random access procedure.
7. The method of claim 1 , wherein the confirmation is an acknowledgement.
8. The method of claim 7 , wherein the transmitting the confirmation is via an uplink control channel.
9. The method of claim 7 , wherein the transmitting the confirmation is via an uplink data channel.
10. The method of claim 1 , wherein the transmitting the confirmation is via an uplink control channel.
11. The method of claim 1 , wherein the transmitting the confirmation is via an uplink data channel.
12. The method of claim 1 , wherein the confirmation comprises a first identifier of the third bandwidth part and a second identifier of the fourth bandwidth part.
13. The method of claim 1 , wherein the first downlink control information indicates an uplink grant for transmission of one or more transport blocks via the second bandwidth part.
14. The method of claim 1 , wherein the first downlink control information indicates an order for a random access procedure.
15. The method of claim 1 , wherein the second downlink control information indicates an uplink grant for transmission of one or more transport blocks via the fourth bandwidth part.
16. The method of claim 15 , wherein the confirmation is a medium access control (MAC) control element.
17. The method of claim 15 , wherein the confirmation is an acknowledgement.
18. The method of claim 1 , wherein the second downlink control information indicates an order for a random access procedure.
19. The method of claim 18 , wherein the confirmation is a medium access control (MAC) control element.
20. The method of claim 19 , wherein the confirmation is an acknowledgement.