IP Library › Granted Patent US 12,587,946
Granted Patent B2
US 12,587,946 · App. 18/097,120 · Granted Mar 24, 2026

Methods and systems for exchanging information in an integrated access and backhaul system

Inventors: Ying Huang (Shenzhen, CN); Lin Chen (Shenzhen, CN)
Assignee: ZTE Corp.
H04W40/36H04L1/1642
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Quick Facts
Patent No.
US 12,587,946
App. No.
18/097,120
Granted
Mar 24, 2026
Kind
B2
Abstract

Methods, apparatus, and systems for reducing packet loss in wireless systems during handover, where one or more user equipment or mobile terminals are connected to an integrated access and backhaul node. The disclosure relates to continuing uplink (UL) and maintain service continuity in an integrated access and backhaul (IAB) system.

Claims (13)

1 . An information transmission method comprising:

sending, by an integrated access and backhaul (IAB) node, uplink (UL) delivery status information to at a child node, wherein the UL delivery status information comprises sequence numbers (SNs) of at least one packet that is received from the child node, wherein the at least one packet has not been transmitted to a parent node of the IAB node or has not be confirmed as received by the parent node of the IAB node; and

sending, by the IAB node, the at least one pack that needs to be re-transmitted to the child node, wherein the at least one packet contains at least one of a first backhaul adaption protocol, BAP, address of a source IAB node, a second BAP address of an access node, or a flag in a BAP subheader.

2 . The method according to claim 1 , wherein the UL delivery status information is sent via a Backhaul Adaptation Protocol (BAP) sublayer control Protocol Data Unit (PDU) or BAP sublayer data PDU or a Radio Link Control (RLC) sublayer control PDU.

3 . The method according to claim 1 , wherein the UL delivery status information includes at least one of a RLC SN, a RLC channel ID or Logical Channel (LC) ID, a backhaul BH) RLC channel ID, or a BAP sublayer SN.

4 . The method according to claim 1 , wherein a backhaul RLC channel for transmitting the at least one packet is configured by a donor centralized unit (CU).

5 . A wireless communication apparatus comprising:

one or more processors; and

a memory, wherein the one or more processors are configured to execute a program from the memory to cause the wireless communication apparatus to perform:

sending, by an integrated access and backhaul (IAB) node, uplink (UL) delivery status information a child node, wherein the UL delivery status information comprises sequence numbers (SNs) of at least one packet that is received from the child node, wherein the at least one packet has not been transmitted to a parent node of the IAB node or has not be confirmed as received by the parent node of the IAB node; and

sending, by the IAB node, the at least one pack that needs to be re-transmitted to the child node, wherein the at least one packet contains at least one of a first backhaul adaption protocol, BAP, address of a source IAB node, a second BAP address of an access node, or a flag in a BAP subheader.

6 . The apparatus of claim 5 , wherein the UL delivery status information is sent via a Backhaul Adaptation Protocol (BAP) sublayer control Protocol Data Unit (PDU) or BAP sublayer data PDU or a Radio Link Control (RLC) sublayer control PDU.

7 . The apparatus of claim 5 , wherein the UL delivery status information includes at least one of a RLC SN, a RLC channel ID or Logical Channel (LC) ID, a backhaul (BH) RLC channel ID, or a BAP sublayer SN.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 13, 2023
From: HUANG, YING; CHEN, LIN
To: ZTE CORPORATION
Reel/Frame 062376/0876 →
Continuity (2)
Continuation PCTCN2020105775 · Jul 30, 2020
Related Publication 20230156565A1 · May 18, 2023
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