Method and apparatus for reporting link assistant information and transmitting data
The present disclosure relates to methods and apparatuses. According to some embodiments of the disclosure, a method includes: receiving, at an integrated access and backhaul node, configuration information from a base station, the configuration information comprising parameters for reporting of assistant information on a backhaul link; and transmitting a message indicating the assistant information on a backhaul link according to the configuration information.
1. A method performed by an integrated access and backhaul (IAB) node, the method comprising:
receiving configuration information from a base station, the configuration information comprising:
parameters for reporting assistant information on a backhaul link;
an indication of an access node of the IAB node; and
a value of a timer associated with the access node;
transmitting a message indicating the assistant information on the backhaul link according to the configuration information; and
starting the timer in response to receiving data from the access node; or
starting the timer in response to transmitting data to the access node.
2. The method of claim 1 , wherein the access node is directly connected to the IAB node or is a user equipment (UE).
3. The method of claim 1 , further comprising:
restarting the timer in response to receiving data from the access node;
restarting the timer in response to transmitting data to the access node;
or a combination thereof.
4. The method of claim 1 , wherein the message is transmitted in response to an expiry of the timer.
5. The method of claim 4 , wherein the message comprises an indication for the expiry of the timer, or the message comprises an indication for a failure in the backhaul link and information indicating two nodes which terminate the backhaul link.
6. The method of claim 1 , wherein the configuration information comprises a maximum number of retransmissions.
7. The method of claim 6 , wherein the message is transmitted in response to the number of retransmissions to an access node of the IAB node exceeds the maximum number of retransmissions.
8. The method of claim 7 , wherein the message comprises an indication that the maximum number of retransmissions has been exceeded and information indicating two nodes which terminate the backhaul link.
9. The method of claim 1 , wherein the configuration information comprises a threshold for a channel quality metric.
10. The method of claim 9 , wherein the message is transmitted in response to a channel quality of the channel between the IAB node and the access node of the IAB being less than the threshold for the channel quality metric.
11. The method of claim 10 , wherein the message comprises an indication for a failure in the backhaul link and information indicating two nodes which terminate the backhaul link.
12. The method of claim 1 , wherein the configuration information comprises information indicating at least one node, and the method further comprises transmitting data to the at least one node according to the configuration information.
13. The method of claim 1 , further comprising:
receiving information indicating at least one node from the base station; and
transmitting data to the at least one node.
14. The method of claim 13 , wherein the information further indicates transmitting the data to the at least one node via a radio link control message.
15. The method of claim 12 , wherein the at least one node is a downstreaming node of the integrated access and backhaul node and the data is transmitted via a radio link control message.
16. The method of claim 12 , wherein the data to be transmitted includes data which has not been acknowledged.
17. The method of claim 12 , further comprising:
receiving a radio link control status report from either the base station or the at least one node; and
determining the data to be transmitted based on the radio link control status report.
18. The method of claim 17 , further comprising receiving, from the base station, a message instructing the transmission of the data via a radio link control message.
19. An integrated access and backhaul (IAB) node, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the IAB node to:
receive configuration information from a base station, the configuration information comprising:
parameters for reporting assistant information on a backhaul link;
an indication of an access node of the IAB node; and
a value of a timer associated with the access node;
transmit a message indicating the assistant information on the backhaul link according to the configuration information; and
start the timer in response to receiving data from the access node; or
start the timer in response to transmitting data to the access node.