SI acquisition and paging for reduced capability NR devices

Patent metadata

Field	Value
Publication number	US-12513600-B2
Application number	US-202118011042-A
Country	US
Kind code	B2
Filing date	Jun 18, 2021
Priority date	Jun 19, 2020
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

Methods for a reduced capability New Radio (NR) device to acquire System Information (SI) transmitted by a cell, where a Radio Resource Control (RRC) message comprised of one or more Bandwidth Reduced System Information Blocks (e.g., SIB1-BR, SIB2-BR, etc.) is received by the NR device using an SI Narrowband.

First claim

What is claimed is:

1 . A method implemented by a Wireless Transmit/Receive Unit (WTRU), the method comprising:
receiving configurations of a set of physical resource blocks (PRBs), a plurality of synchronization signal blocks (SSBs), and a set of physical downlink control channel (PDCCH) monitoring occasions for scheduling of a physical downlink shared channel (PDSCH) carrying system information (SI) messages, wherein each PRB in the set of PRBs is associated with an SSB of the plurality of SSBs; determining a first SSB of the plurality of SSBs for receiving a first SI message; determining a first PRB of the set of PRBs, wherein the first PRB is associated with a first PDCCH monitoring occasion; receiving a PDCCH transmission during the first PDCCH monitoring occasion and at a frequency location indicated by the first PRB; and receiving, based on information received in the PDCCH transmission, a first PDSCH transmission, wherein the first PDSCH transmission comprises the first SI message.

2 . The method of claim 1 , wherein the configurations of the set of the PRBs comprise a plurality of frequency ranges.

3 . The method of claim 1 , wherein the configurations of the set of PRBs comprise configurations of a plurality of system information narrowbands (SI-NBs).

4 . The method of claim 1 , wherein the configurations of the set of PRBs are received in a radio resource control (RRC) message.

5 . The method of claim 4 , wherein the RRC message is a system information block type 1 bandwidth reduced (SIB1-BR) message.

6 . The method of claim 5 , wherein the SIB1-BR message is received in an initial downlink bandwidth part (DL BWP) and a first system information narrowband (SI-NB) of the configurations corresponds to a second downlink bandwidth part (DL BWP) that is different than the initial DL BWP.

7 . The method of claim 5 , wherein a Master Information Block (MIB) indicates a downlink bandwidth part (DL BWP) to use for reception of the SIB1-BR message.

8 . The method of claim 1 , wherein the first SSB of the plurality of SSBs for receiving the first SI message is different than remaining minimum system information (RMSI) or SIB1.

9 . The method of claim 1 , wherein the PDCCH transmission comprises Downlink Control Information (DCI) used to dynamically schedule a second PDSCH transmission.

10 . The method of claim 9 , wherein the DCI further comprises a field to indicate if an SI is for a legacy device or a reduced capability New Radio (NR) device.

11 . A wireless transmit/receive unit (WTRU) comprising one or more processors and memory storing instructions that, when executed by the one or more processors, cause the WTRU to:
receive configurations of a set of physical resource blocks (PRBs), a plurality of synchronization signal blocks (SSBs), and a set of physical downlink control channel (PDCCH) monitoring occasions for scheduling of a physical downlink shared channel (PDSCH) carrying system information (SI) messages, wherein each PRB in the set of PRBs is associated with an SSB of the plurality of SSBs; determine a first SSB of the plurality of SSBs for receiving a first SI message; determine a first PRB of the set of PRBs, wherein the first PRB is associated with a first PDCCH monitoring occasion; receive a PDCCH transmission during the first PDCCH monitoring occasion and at a frequency location indicated by the first PRB; and receive, based on information received in the first-PDCCH transmission, a first PDSCH transmission, wherein the first PDSCH transmission comprises the first SI message.

12 . The WTRU of claim 11 , wherein the configurations of the set of the PRBs comprise a plurality of frequency ranges.

13 . The WTRU of claim 11 , wherein the configurations of the set of PRBs comprise configurations of a plurality of system information narrowbands (SI-NBs).

14 . The WTRU of claim 11 , wherein the configurations of the set of PRBs are received in a radio resource control (RRC) message.

15 . The WTRU of claim 14 , wherein the RRC message is a system information block type 1 bandwidth reduced (SIB1-BR) message.

16 . The WTRU of claim 15 , wherein the SIB1-BR message is received in an initial downlink bandwidth part (DL BWP) and a first system information narrowband (SI-NB) of the configurations corresponds to a second downlink bandwidth part (DL BWP) that is different than the initial DL BWP.

17 . The WTRU of claim 15 , wherein a Master Information Block (MIB) indicates a downlink bandwidth part (DL BWP) to use for reception of the SIB1-BR message.

18 . The WTRU of claim 11 , wherein the first SSB of the plurality of SSBs for receiving the first SI message is different than remaining minimum system information (RMSI) or SIB1.

19 . The WTRU of claim 11 , wherein the PDCCH transmission comprises Downlink Control Information (DCI) used to dynamically schedule a second PDSCH transmission.

20 . The WTRU of claim 19 , wherein the DCI further comprises a field to indicate if an SI is for a legacy device or a reduced capability New Radio (NR) device.

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Murray Joseph
• Adjakple Pascal
• Awadin Mohamed M
• Pan Kyle
• Di Girolamo Rocco
• Chen Zhuo
• Li Yifan
• Tsai Allan
• Svedman Patrick
• Zhang Guodong

Classifications

• H04W72/1273

  of downlink data flows · CPC title

• H04W72/232

  the control data signalling from the physical layer, e.g. DCI signalling · CPC title

• H04W88/02

  Terminal devices · CPC title

• H04W48/12 Primary

  using downlink control channel · CPC title