Enhanced reestablishment procedure in integrated access and backhaul nodes

An apparatus of network-triggered reestablishment by a network node of a wireless communication network, comprising:

• a memory storing instructions;
• and
• a processor communicatively coupled with the memory and configured to execute the instructions to:
• transmit, to a user equipment (UE) in a connected state with a first central unit (CU), an indication to perform a radio resource control (RRC) reestablishment procedure with a second CU, the indication comprising a reestablishment cell identifier and indicates to deactivate deciphering for detection of a RRC reestablishment message;
• and
• perform the RRC reestablishment procedure with the UE to transfer the UE from the first CU to the second CU using the reestablishment cell identifier.

A method of network-triggered reestablishment by a user equipment (UE) of a wireless communication network, comprising:

• receiving, from a network node, an indication to perform a radio resource control (RRC) reestablishment procedure with a second central unit (CU), the indication comprising a reestablishment cell identifier, wherein the UE is in a connected state with a first CU;
• terminating a first connection between a first logical distributed unit (DU) and the UE, the first logical DU being associated with the physical cell;
• and
• performing, in response to receiving the indication, the RRC reestablishment procedure with the network node to transfer the UE from the first CU to the second CU using the reestablishment cell identifier and establish a connection between a second logical EDU and the UE, the second logical DU being associated with at least a portion of a physical cell corresponding to the reestablishment cell identifier.

An apparatus of network-triggered reestablishment by a user equipment (UE) of a wireless communication network, comprising:

• a memory storing instructions;
• and
• a processor communicatively coupled with the memory and configured to execute the instructions to:
• receive, from a network node, an indication to perform a radio resource control (RRC) reestablishment procedure with a second central unit (CU), the indication comprising a reestablishment cell identifier and indicates to deactivate deciphering for detection of a RRC reestablishment message, wherein the UE is in a connected state with a first CU;
• and
• perform, in response to receiving the indication, the RRC reestablishment procedure with the network node to transfer the UE from the first CU to the second CU using the reestablishment cell identifier.