Wireless backhaul link information via adaptation layer packets
A wireless device communicates, with a base station distributed unit (BS-DU) and via at least one bearer configured between the wireless device and a base station central unit (BS-CU) through the BS-DU, a first adaptation layer packet, wherein a first header of the first adaptation layer packet comprises a route identifier indicating a route. The wireless device receives, from the BS-DU, backhaul link information indicating a failure of a link between the BS-DU and the BS-CU, wherein a second header of a second adaptation layer packet comprises the backhaul link information indicating the failure of the link.
1. A method comprising:
communicating, by a wireless device with a base station distributed unit (BS-DU) and via at least one bearer configured between the wireless device and a base station central unit (BS-CU) through the BS-DU, a first adaptation layer packet, wherein a first header of the first adaptation layer packet comprises a route identifier indicating a route; and
receiving, by the wireless device from the BS-DU, backhaul link information indicating a failure of a link between the BS-DU and the BS-CU, wherein a second header of a second adaptation layer packet comprises the backhaul link information indicating the failure of the link.
2. The method of claim 1 , further comprising continuing, by the wireless device to the BS-DU and based on the failure of the link, transmission of channel state information.
3. The method of claim 1 , further comprising continuing, by the wireless device to the BS-DU and based on the failure of the link, transmission of a sounding reference signal.
4. The method of claim 1 , wherein the BS-DU stops transmission of an uplink resource grant to the wireless device based on the failure of the link.
5. The method of claim 1 , further comprising stopping, by the wireless device to the BS-DU and based on the failure of the link, transmission of a scheduling request for the at least one bearer.
6. The method of claim 1 , wherein the wireless device receives the backhaul link information from the BS-DU via at least one of:
a medium access control (MAC) control element (CE);
a physical layer command comprising downlink control information;
a radio resource control message;
an adaptive layer indication; and
an indication parameter indicating a state transition into a dormant state of one or more cells of the BS-DU.
7. The method of claim 1 , wherein the backhaul link information comprises at least one of:
a first node identifier of the BS-DU;
a second node identifier of the BS-CU;
a failure type comprising at least one of:
a temporary failure;
a failure of one of multiple backhaul links of the BS-DU; and
a failure of all backhaul links of the BS-DU;
a timer value for determining an integrated access and backhaul node failure;
an indication parameter indicating a state transition into a dormant state of one or more cells of the BS-DU;
a bearer identifier of a bearer affected by the failure; and
a cell identifier of a cell of the BS-CU, the cell causing the failure.
8. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
communicate, with a base station distributed unit (BS-DU) and via at least one bearer configured between the wireless device and a base station central unit (BS-CU) through the BS-DU, a first adaptation layer packet, wherein a first header of the first adaptation layer packet comprises a route identifier indicating a route; and
receive, from the BS-DU, backhaul link information indicating a failure of a link between the BS-DU and the BS-CU, wherein a second header of a second adaptation layer packet comprises the backhaul link information indicating the failure of the link.
9. The wireless device of claim 8 , wherein the instructions further cause the wireless device to continue, based on the failure of the link, transmission of channel state information to the BS-DU.
10. The wireless device of claim 8 , wherein the instructions further cause the wireless device to continue, based on the failure of the link, transmission of a sounding reference signal to the BS-DU.
11. The wireless device of claim 8 , wherein the BS-DU stops transmission of an uplink resource grant to the wireless device based on the failure of the link.
12. The wireless device of claim 8 , wherein the instructions further cause the wireless device to stop, based on the failure of the link, transmission of a scheduling request for the at least one bearer.
13. The wireless device of claim 8 , wherein the wireless device receives the backhaul link information from the BS-DU via at least one of:
a medium access control (MAC) control element (CE);
a physical layer command comprising downlink control information;
a radio resource control message;
an adaptive layer indication; and
an indication parameter indicating a state transition into a dormant state of one or more cells of the BS-DU.
14. The wireless device of claim 8 , wherein the backhaul link information comprises at least one of:
a first node identifier of the BS-DU;
a second node identifier of the BS-CU;
a failure type comprising at least one of:
a temporary failure;
a failure of one of multiple backhaul links of the BS-DU; and
a failure of all backhaul links of the BS-DU;
a timer value for determining an integrated access and backhaul node failure;
an indication parameter indicating a state transition into a dormant state of one or more cells of the BS-DU;
a bearer identifier of a bearer affected by the failure; and
a cell identifier of a cell of the BS-CU, the cell causing the failure.
15. A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors, cause a wireless device to:
communicate, with a base station distributed unit (BS-DU) and via at least one bearer configured between the wireless device and a base station central unit (BS-CU) through the BS-DU, a first adaptation layer packet, wherein a first header of the first adaptation layer packet comprises a route identifier indicating a route; and
receive, from the BS-DU, backhaul link information indicating a failure of a link between the BS-DU and the BS-CU, wherein a second header of a second adaptation layer packet comprises the backhaul link information indicating the failure of the link.
16. The computer-readable medium of claim 15 , wherein the instructions further cause the wireless device to continue, based on the failure of the link, transmission of channel state information to the BS-DU.
17. The computer-readable medium of claim 15 , wherein the instructions further cause the wireless device to continue, based on the failure of the link, transmission of a sounding reference signal to the BS-DU.
18. The computer-readable medium of claim 15 , wherein the BS-DU stops transmission of an uplink resource grant to the wireless device based on the failure of the link.
19. The computer-readable medium of claim 15 , wherein the instructions further cause the wireless device to stop, based on the failure of the link, transmission of a scheduling request for the at least one bearer.
20. The computer-readable medium of claim 15 , wherein the wireless device receives the backhaul link information from the BS-DU via at least one of:
a medium access control (MAC) control element (CE);
a physical layer command comprising downlink control information;
a radio resource control message;
an adaptive layer indication; and
an indication parameter indicating a state transition into a dormant state of one or more cells of the BS-DU.