Section: 5.2.2.3.3 Request for on demand system information
Content: The UE shall, while SDT procedure is not ongoing: 1> if SIB1 includes si-SchedulingInfo containing si-RequestConfigSUL-MSG1-Repetition and criteria to select supplementary uplink as defined in TS 38.321[ NR; Medium Access Control (MAC) protocol specification ] [3], clause 5.1.1 is met and if criteria to apply MSG1 repetition as defined in TS 38.321[ NR; Medium Access Control (MAC) protocol specification ] [3], clause 5.1.1e for the concerned si-RequestConfigSUL-MSG1-Repetition is met: 2> trigger the lower layer to initiate the Random Access procedure on supplementary uplink in accordance with TS 38.321[ NR; Medium Access Control (MAC) protocol specification ]  [3] using the PRACH preamble(s) and PRACH resource(s) associated with the applicable MSG1 repetition number in si-RequestConfigSUL-MSG1-Repetition corresponding to the SI message(s) that the UE requires to operate within the cell, and for which si-BroadcastStatus is set to notBroadcasting; 2> if acknowledgement for SI request is received from lower layers: 3> acquire the requested SI message(s) as defined in clause 5.2.2.3.2, immediately; 1> else if the UE is a RedCap UE and if initialUplinkBWP-RedCap is configured in UplinkConfigCommonSIB and if SIB1 includes si-SchedulingInfo containing si-RequestConfigRedCap-MSG1-Repetition and criteria to select normal uplink as defined in TS 38.321[ NR; Medium Access Control (MAC) protocol specification ] [3], clause 5.1.1 is met and if criteria to apply MSG1 repetition as defined in TS 38.321[ NR; Medium Access Control (MAC) protocol specification ] [3], clause 5.1.1e for the concerned si-RequestConfigRedCap-MSG1-Repetition is met: 2> trigger the lower layer to initiate the Random Access procedure on normal uplink in accordance with TS 38.321[ NR; Medium Access Control (MAC) protocol specification ]  [3] using the PRACH preamble(s) and PRACH resource(s) associated with the applicable MSG1 repetition number in si-RequestConfigRedCap-MSG1-Repetition corresponding to the SI message(s) that the UE requires to operate within the cell, and for which si-BroadcastStatus is set to notBroadcasting; 2> if acknowledgement for SI request is received from lower layers: 3> acquire the requested SI message(s) as defined in clause 5.2.2.3.2, immediately; 1> else if SIB1 includes si-SchedulingInfo containing si-RequestConfigSUL and criteria to select supplementary uplink as defined in TS 38.321[ NR; Medium Access Control (MAC) protocol specification ] [3], clause 5.1.1 is met: 2> trigger the lower layer to initiate the Random Access procedure on supplementary uplink in accordance with TS 38.321[ NR; Medium Access Control (MAC) protocol specification ]  [3] using the PRACH preamble(s) and PRACH resource(s) in si-RequestConfigSUL corresponding to the SI message(s) that the UE requires to operate within the cell, and for which si-BroadcastStatus is set to notBroadcasting; 2> if acknowledgement for SI request is received from lower layers: 3> acquire the requested SI message(s) as defined in clause 5.2.2.3.2, immediately; 1> else if the UE is an (e)RedCap UE and if initialUplinkBWP-RedCap is configured in UplinkConfigCommonSIB and if SIB1 includes si-SchedulingInfo containing si-RequestConfigRedCap and criteria to select normal uplink as defined in TS 38.321[ NR; Medium Access Control (MAC) protocol specification ] [3], clause 5.1.1 is met: 2> trigger the lower layer to initiate the Random Access procedure on normal uplink in accordance with TS 38.321[ NR; Medium Access Control (MAC) protocol specification ]  [3] using the PRACH preamble(s) and PRACH resource(s) in si-RequestConfigRedcap corresponding to the SI message(s) that the UE requires to operate within the cell, and for which si-BroadcastStatus is set to notBroadcasting; 2> if acknowledgement for SI request is received from lower layers: 3> acquire the requested SI message(s) as defined in clause 5.2.2.3.2, immediately; 1> else: 2> if the UE is not a RedCap UE and if SIB1 includes si-SchedulingInfo containing si-RequestConfigMSG1-Repetition and criteria to select normal uplink and to apply MSG1 repetition as defined in TS 38.321[ NR; Medium Access Control (MAC) protocol specification ] [3], clause 5.1.1e for the concerned si-RequestConfigMSG1-Repetition are met; or 2> if the UE is a RedCap UE and if initialUplinkBWP-RedCap is not configured in UplinkConfigCommonSIB and if SIB1 includes si-SchedulingInfo containing si-RequestConfigMSG1-Repetition and criteria to select normal uplink and to apply MSG1 repetition as defined in TS 38.321[ NR; Medium Access Control (MAC) protocol specification ] [3], clause 5.1.1e for the concerned si-RequestConfigMSG1-Repetition are met: 3> trigger the lower layer to initiate the Random Access procedure on normal uplink in accordance with TS 38.321[ NR; Medium Access Control (MAC) protocol specification ]  [3] using the PRACH preamble(s) and PRACH resource(s) associated with the applicable MSG1 repetition number in corresponding to the SI message(s) that the UE requires to operate within the cell, and for which si-BroadcastStatus is set to notBroadcasting; 3> if acknowledgement for SI request is received from lower layers: 4> acquire the requested SI message(s) as defined in clause 5.2.2.3.2, immediately; 2> else if the UE is neither a RedCap nor an eRedCap UE and if SIB1 includes si-SchedulingInfo containing si-RequestConfig and criteria to select normal uplink as defined in TS 38.321[ NR; Medium Access Control (MAC) protocol specification ] [3], clause 5.1.1 is met; or 2> if the UE is an (e)RedCap UE and if initialUplinkBWP-RedCap is not configured in UplinkConfigCommonSIB and if SIB1 includes si-SchedulingInfo containing si-RequestConfig and criteria to select normal uplink as defined in TS 38.321[ NR; Medium Access Control (MAC) protocol specification ] [3], clause 5.1.1 is met: 3> trigger the lower layer to initiate the Random Access procedure on normal uplink in accordance with TS 38.321[ NR; Medium Access Control (MAC) protocol specification ]  [3] using the PRACH preamble(s) and PRACH resource(s) in si-RequestConfig corresponding to the SI message(s) that the UE requires to operate within the cell, and for which si-BroadcastStatus is set to notBroadcasting; 3> if acknowledgement for SI request is received from lower layers: 4> acquire the requested SI message(s) as defined in clause 5.2.2.3.2, immediately; 2> else: 3> apply the default L1 parameter values as specified in corresponding physical layer specifications except for the parameters for which values are provided in SIB1; 3> apply the default MAC Cell Group configuration as specified in 9.2.2; 3> apply the timeAlignmentTimerCommon included in SIB1; 3> apply the CCCH configuration as specified in 9.1.1.2; 3> initiate transmission of the RRCSystemInfoRequest message with rrcSystemInfoRequest in accordance with 5.2.2.3.4; 3> if acknowledgement for RRCSystemInfoRequest message with rrcSystemInfoRequest is received from lower layers: 4> acquire the requested SI message(s) as defined in clause 5.2.2.3.2, immediately; 1> if cell reselection occurs while waiting for the acknowledgment for SI request from lower layers: 2> reset MAC; 2> if SI request is based on RRCSystemInfoRequest message with rrcSystemInfoRequest: 3> release RLC entity for SRB0. NOTE: After RACH failure for SI request it is up to UE implementation when to retry the SI request.