Method and apparatus for failure notification on backhaul link in wireless communication system
AssigneeLG Electronics Inc.
InventorsSunghoon Jung, Gyeongcheol Lee
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Abstract
The present disclosure relates to method and apparatus for failure notification in wireless communications. According to an embodiment of the present disclosure, a method performed by a first wireless device in a wireless communication system comprises: detecting a failure of a backhaul link; performing a connection re-establishment attempt upon detecting the failure of the backhaul link; and transmitting a failure notification to a second wireless device based on a determination that the connection re-establishment attempt fails.
Claims14
A method performed by an integrated access and backhaul (IAB) node in a wireless communication system, the method comprising:
- receiving, from a parent node for the IAB node over a backhaul (BH) radio link control (RLC) channel, a protocol data unit (PDU) comprising a first BH link failure notification notifying a failure of a backhaul link between IAB nodes;
- performing a connection re-establishment attempt based on a reception of the PDU comprising the first BH link failure notification;
- detecting a failure of the connection re-establishment attempt;
- and
- based on the failure of the connection re-establishment attempt being detected, transmitting, to a child node for the IAB node over a BH RLC channel, a PDU comprising a second BH link failure notification notifying the failure of the backhaul link,
- wherein the first BH link failure notification and the second BH link failure notification are transferred in a downstream direction.
An integrated access and backhaul (IAB) node in a wireless communication system comprising:
- a transceiver;
- a memory;
- and
- at least one processor operatively coupled to the transceiver and the memory, wherein the memory stores instructions that, based on being executed by the at least one processor, perform operations comprising:
- receiving, from a parent node for the IAB node over a backhaul (BH) radio link control (RLC) channel, a protocol data unit (PDU) comprising a first BH link failure notification notifying a failure of a backhaul link between IAB nodes;
- performing a connection re-establishment attempt based on a reception of the PDU comprising the first BH link failure notification;
- detecting a failure of the connection re-establishment attempt;
- and
- based on the failure of the connection re-establishment attempt being detected, transmitting, to a child node for the IAB node over a BH RLC channel, a PDU comprising a second BH link failure notification notifying the failure of the backhaul link,
- wherein the first BH link failure notification and the second BH link failure notification are transferred in a downstream direction.
A user equipment (UE) configured to operate in a wireless communication system, the UE comprising:
- a transceiver;
- a memory;
- and
- at least one processor operatively coupled to the transceiver and the memory,
- wherein the memory stores instructions that, based on being executed by the at least one processor, perform operations comprising:
- communicating with an integrated access and backhaul (IAB) node,
- wherein the IAB node performs a connection re-establishment attempt based on receiving, from a parent node for the IAB node over a backhaul (BH) radio link control (RLC) channel, a protocol data unit (PDU) comprising a first BH link failure notification notifying a failure of a backhaul link between IAB nodes,
- wherein, based on a failure of the connection re-establishment attempt being detected, the IAB node transmits, to a child node for the IAB node over a BH RLC channel, a PDU comprising a second BH link failure notification notifying the failure of the backhaul link, and
- wherein the first BH link failure notification and the second BH link failure notification are transferred in a downstream direction.
Dependencies are inferred from the claim text.