Resource management for wireless backhaul networks

Patent metadata

Field	Value
Publication number	US-12185280-B2
Application number	US-202017598799-A
Country	US
Kind code	B2
Filing date	Mar 27, 2020
Priority date	Mar 28, 2019
Publication date	Dec 31, 2024
Grant date	Dec 31, 2024

Abstract

The IAB node comprises receiver circuitry and processor circuitry. The receiver circuitry is configured to receive information on a resource allocation of OFDM symbols within one or more slots. The processor circuitry is configured to determine from the information both a slot format indicator and a time resource indication. The slot format indicator is configured to indicate, for each OFDM symbol of the slot, whether the symbol is an uplink symbol, a downlink symbol, or a flexible symbol. The time resource indicator, TRI, is configured to indicate, for each OFDM symbol of the slot, whether the symbol may be allocated by a parent node or by the IAB node. The processor circuitry is further configured to control utilization of one or more symbols of the slot at least in part in accordance with a respective symbol allocation from the time resource indication and the slot format indicator.

First claim

What is claimed is:

1. An Integrated Access and Backhaul (IAB) node comprising:
receiver circuitry configured to receive first information and second information on an allocated resource of orthogonal frequency-division multiplexing (OFDM) symbols within one or more slots; and
processor circuitry configured to determine:
a slot format indicator which indicates, for an OFDM symbol of a slot of the one or more slots, whether the OFDM symbol is an uplink symbol, a downlink symbol, or a flexible symbol from the first information, and
a resource indication of soft resources which indicates, for each OFDM symbol, whether the OFDM symbol is available by the IAB node based on the second information, wherein

cyclic redundancy check (CRC) bits of downlink control information (DCI), which indicates the slot format indicator, are scrambled by a first radio network temporary identifier (RNTI), and
CRC bits of DCI, which indicates the resource indication of soft resources, are scrambled by a second RNTI.

2. The IAB node of the claim 1 , wherein:
the receiver circuitry is further configured to receive the DCI, which is to indicate the resource indication of soft resources, on an IAB node specific search space.

3. An Integrated Access and Backhaul (IAB) node comprising:
transmitter circuitry configured to transmit first information and second information on an allocated resource of orthogonal frequency-division multiplexing (OFDM) symbols within one or more slots to another IAB node, wherein
the transmitted first information includes a slot format indicator which indicates, for an OFDM symbol of a slot of the one or more slots, whether the OFDM symbol is an uplink symbol, a downlink symbol, or a flexible symbol,
the transmitted second information includes a resource indication of soft resources which indicates, for each OFDM symbol, whether the OFDM symbol is available by the other IAB node,
cyclic redundancy check (CRC) bits of downlink control information (DCI), which indicates the slot format indicator, are scrambled by a first radio network temporary identifier (RNTI), and
CRC bits of DCI, which indicates the resource indication of soft resources, are scrambled by a second RNTI.

4. The IAB node of the claim 3 , wherein:
the transmitter circuitry is further configured to transmit the DCI, which indicates the resource indication of soft resources, on an IAB node specific search space.

5. A base station comprising:
transmitter circuitry configured to transmit first information and second information on an allocated resource of orthogonal frequency-division multiplexing (OFDM) symbols within one or more slots to an Integrated Access and Backhaul (IAB) node; and
processor circuitry configured to:
include, in the transmitted first information, a slot format indicator which indicates, for an OFDM symbol of a slot of the one or more slots, whether the OFDM symbol is an uplink symbol, a downlink symbol, or a flexible symbol, and
include, in the transmitted second information, a resource indication of soft resources which indicates, for each OFDM symbol, whether the OFDM symbol is available by the IAB node, wherein

cyclic redundancy check (CRC) bits of downlink control information (DCI), which indicates the slot format indicator, are scrambled by a first radio network temporary identifier (RNTI), and
CRC bits of DCI, which indicates the resource indication of soft resources, are scrambled by a second RNTI.

6. The base station of the claim 5 , wherein:
the transmitter circuitry is further configured to transmit the DCI, which indicates the resource indication of soft resources, on an IAB node specific search space.

Assignees

• Sharp Kk

Inventors

• Yokomakura Kazunari
• Kowalski John Michael
• Aiba Tatsushi
• Ishii Atsushi

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W88/14

  Backbone network devices · CPC title

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04L1/0061

  Error detection codes · CPC title

• H04W84/047

  using dedicated repeater stations · CPC title