Section: 5.2.2.3.3a Request for on demand positioning system information
Content: The UE shall, while SDT procedure is not ongoing: 1> if SIB1 includes si-SchedulingInfo containing posSI-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 posSI-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 posSI-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 posSI-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 posSI-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 posSI-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 posSI-SchedulingInfo containing posSI-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 posSI-RequestConfigSUL corresponding to the SI message(s) that the UE upper layers require for positioning operations, and for which posSI-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 posSI-SchedulingInfo containing posSI-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 posSI-RequestConfigRedCap corresponding to the SI message(s) that the UE upper layers require for positioning operations, and for which posSI-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 posSI-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 posSI-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 posSI-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 posSI-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 posSI-RequestConfigMSG1-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; 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 not an (e)RedCap UE and if SIB1 includes posSI-SchedulingInfo containing posSI-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 posSI-SchedulingInfo containing posSI-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 posSI-RequestConfig corresponding to the SI message(s) that the UE upper layers require for positioning operations , and for which posSI-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 rrcPosSystemInfoRequest in accordance with 5.2.2.3.4; 3> if acknowledgement for RRCSystemInfoRequest message with rrcPosSystemInfoRequest 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 rrcPosSystemInfoRequest: 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.