Packet delay budget (PDB) and time sensitive communication (TSC) traffic in integrated access and backhaul (IAB) networks

Patent metadata

Field	Value
Publication number	US-12568482-B2
Application number	US-202117468471-A
Country	US
Kind code	B2
Filing date	Sep 7, 2021
Priority date	Sep 8, 2020
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

Aspects of the present disclosure may provide an apparatus, which may include a first node that may receive an indication of a one-hop radio link control (RLC) channel packet delay budget (PDB) for an RLC channel between the first node and a second node. The PDB is across a full protocol stack or a partial protocol stack. The first node may then schedule communications with the second node based on the one-hop RLC channel PDB. In some cases, an IAB node may report a capability of its stack processing time to an IAB donor node and/or a parent IAB node (directly or indirectly).

First claim

What is claimed is:

1 . A method for wireless communication by a first node, comprising:
receiving an indication of a one-hop radio link control (RLC) channel packet delay budget (PDB) for an RLC channel between the first node and a second node,
wherein the one-hop RLC channel PDB is across a full protocol stack between backhaul adaption protocol (BAP) layers of the first node and the second node and includes a processing time of a plurality of protocol layers of the first node, a processing time of a plurality of protocol layers of the second node, and over-the-air transmission time,
wherein the one-hop RLC channel PDB for downlink (DL) is between an ingress of a first packet at a BAP layer at the first node and an egress of the first packet at a BAP layer at the second node, and
wherein the one-hop RLC channel PDB for uplink (UL) is between an ingress of a second packet at the BAP layer at the second node and an egress of the second packet at the BAP layer at the first node; and
scheduling communications with the second node based on the RLC channel PDB.

2 . The method of claim 1 , wherein the indication of the one-hop RLC channel PDB is semi-statically configured by a central unit.

3 . The method of claim 1 , wherein the first node is an integrated access and backhaul (IAB) node and the second node is a child IAB node or a user equipment (UE) of the first node, and wherein the full protocol stack is between a distributed unit (DU) of the first node and a mobile terminal (MT) of the second node.

4 . The method of claim 1 , wherein:
the indication of the one-hop RLC channel PDB comprises assistance information determining one or more one-hop RLC channel PDBs for one or more other nodes including the second node, and the method further comprises:
determining the one or more one-hop RLC channel PDBs for the one or more other nodes based, at least in part, on the assistance information; and
configuring the one or more other nodes with the one or more one-hop RLC channel PDBs for the one or more other nodes including the second node.

5 . The method of claim 4 , wherein the assistance information is received at a control unit (CU) control plane (CP) (CU-CP) from a CU user plane (UP) (CU-UP).

6 . The method of claim 4 , wherein the first node comprises a node with a wired connection to a core network, and wherein the one or more other nodes comprise nodes with a wireless connection to the first node, to each other, or a combination thereof.

7 . The method of claim 4 , wherein the assistance information is received via an E1 interface.

8 . The method of claim 4 , wherein the assistance information includes user plane information forwarded from one or more distributed units (DUs) including, for each of the one or more other nodes, information associated with a data radio bearer (DRB), a RLC channel, or both.

9 . The method of claim 8 , wherein the assistance information further includes one or more of:
average channel quality indicator (CQI), average number hybrid automatic repeat request (HARQ) retransmissions, average HARQ failure, downlink radio quality index, uplink radio quality index, downlink delay, uplink delay, buffer loading, a desired buffer size, or a combination thereof, or a full set or a subset of the information from the one or more DUs, processed information, or a combination thereof.

10 . The method of claim 4 , further comprising:
receiving one or more layer 3 measurement reports from one or more of the one or more other nodes, wherein determining the one or more one-hop RLC channel PDBs is further based on the one or more layer 3 measurement reports.

11 . An apparatus for wireless communication by a first node, comprising:
at least one memory having executable instructions stored thereon; and one or more processors configured to execute the executable instructions to cause the apparatus to:
receive an indication of a one-hop radio link control (RLC) channel packet delay budget (PDB) for an RLC channel between the first node and a second node,
wherein the one-hop RLC channel PDB is across a full protocol stack between backhaul adaption protocol (BAP) layers of the first node and the second node and includes a processing time of a plurality of protocol layers of the first node, a processing time of a plurality of protocol layers of the second node, and over-the-air transmission time,
wherein the one-hop RLC channel PDB for downlink (DL) is between an ingress of a first packet at a BAP layer at the first node and an egress of the first packet at a BAP layer at the second node, and
wherein the one-hop RLC channel PDB for uplink (UL) is between an ingress of a second packet at the BAP layer at the second node and an egress of the second packet at the BAP layer at the first node; and

schedule communications with the second node based on the one-hop RLC channel PDB.

Assignees

• Qualcomm Inc

Inventors

• Luo Jianghong
• Hampel Karl Georg
• Abedini Navid
• Akl Naeem
• Blessent Luca
• Luo Tao
• Li Junyi

Classifications

• H04W72/542

  using measured or perceived quality · CPC title

• H04L47/283

  in response to processing delays, e.g. caused by jitter or round trip time [RTT] · CPC title

• H04W28/0268

  using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] (negotiating SLA or negotiating QoS H04W28/24) · CPC title

• H04W80/02

  Data link layer protocols · CPC title

• H04L1/1812

  Hybrid protocols; Hybrid automatic repeat request [HARQ] · CPC title