SI acquisition and paging for reduced capability NR devices
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.
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.