Section: 5.8.3.2 Initiation
Content: A UE capable of NR sidelink communication or NR sidelink discovery or NR sidelink U2N relay operation or NR sidelink U2U relay operation or NR sidelink positioning that is in RRC_CONNECTED may initiate the procedure to indicate it is (interested in) receiving or transmitting NR sidelink communication or NR sidelink discovery or NR sidelink U2N relay operation or NR sidelink U2U relay operation or SL-PRS transmission/reception in several cases including upon successful connection establishment or resuming, upon change of interest, upon changing QoS profile(s), upon receiving UECapabilityInformationSidelink from the associated peer UE, upon RLC mode information updated from the associated peer UE or upon change to a PCell providing SIB12 including sl-ConfigCommonNR, or upon change to a PCell providing SIB23 including sl-PosConfigCommonNR. A UE capable of NR sidelink communication may initiate the procedure to request assignment of dedicated sidelink DRB configuration and transmission resources for NR sidelink communication transmission. A UE capable of NR sidelink communication may initiate the procedure to report to the network that a sidelink radio link failure, sidelink RRC reconfiguration failure or sidelink carrier failure has been declared. A UE capable of NR sidelink discovery may initiate the procedure to request assignment of dedicated resources for NR sidelink discovery transmission or NR sidelink discovery reception. A UE capable of U2N relay operation may initiate the procedure to report/update parameters for acting as U2N Relay UE or U2N Remote UE (including L2 Remote UE's source L2 ID). A UE capable of U2U relay operation may initiate the procedure to report/update parameters for acting as U2U Relay UE or U2U Remote UE. A UE capable of NR sidelink positioning may initiate the procedure to request it is interested or no longer interested in either transmitting SL-PRS or receiving sidelink control information for SL-PRS. A UE capable of NR sidelink operation that is in RRC_CONNECTED may initiate the procedure to report the sidelink DRX configuration received from the associated peer UE for NR sidelink unicast reception, upon accepting the sidelink DRX configuration from the associated peer UE. A UE capable of NR sidelink communication that is configured with sl-ScheduledConfig and is performing sidelink unicast transmission may initiate the procedure to report the sidelink DRX assistance information or the sidelink DRX configuration reject information received from the associated peer UE, upon receiving either of them from the associated peer UE. A UE capable of NR sidelink communication that is configured with sl-ScheduledConfig and is performing sidelink groupcast transmission may initiate the procedure to report the sidelink DRX on/off indication for the associated Destination Layer-2 ID. A UE capable of NR sidelink operation that is in RRC_CONNECTED may initiate the procedure to report the Destination Layer-2 ID and QoS profile(s) associated with its interested service(s) that sidelink DRX is applied, for NR sidelink groupcast or broadcast reception. Upon initiating this procedure, the UE shall: 1> if SIB12 including sl-ConfigCommonNR is provided by the PCell: 2> ensure having a valid version of SIB12 for the PCell; 2> if configured by upper layers to receive NR sidelink communication on the frequency included in sl-FreqInfoList/sl-FreqInfoListSizeExt in SIB12 of the PCell: 3> if the UE did not transmit a SidelinkUEInformationNR message since last entering RRC_CONNECTED state; or 3> if since the last time the UE transmitted a SidelinkUEInformationNR message the UE connected to a PCell not providing SIB12 including sl-ConfigCommonNR; or 3> if the last transmission of the SidelinkUEInformationNR message did not include sl-RxInterestedFreqList; or if the frequency configured by upper layers to receive NR sidelink communication on has changed since the last transmission of the SidelinkUEInformationNR message: 4> initiate transmission of the SidelinkUEInformationNR message to indicate the NR sidelink communication reception frequency of interest in accordance with 5.8.3.3; 2> else: 3> if the last transmission of the SidelinkUEInformationNR message included sl-RxInterestedFreqList: 4> initiate transmission of the SidelinkUEInformationNR message to indicate it is no longer interested in NR sidelink communication reception in accordance with 5.8.3.3; 2> if configured by upper layers to transmit non-relay NR sidelink communication on the frequency included in sl-FreqInfoList/sl-FreqInfoListSizeExt in SIB12 of the PCell; or 2> if configured by upper layer to transmit NR sidelink L3 U2U relay communication on the frequency included in sl-FreqInfoList in SIB12 of the PCell including [FFS gNB capability indication]: 3> if the UE did not transmit a SidelinkUEInformationNR message since last entering RRC_CONNECTED state; or 3> if since the last time the UE transmitted a SidelinkUEInformationNR message the UE connected to a PCell not providing SIB12 including sl-ConfigCommonNR; or 3> if the last transmission of the SidelinkUEInformationNR message did not include sl-TxResourceReqList; or if the information carried by the sl-TxResourceReqList has changed since the last transmission of the SidelinkUEInformationNR message: 4> initiate transmission of the SidelinkUEInformationNR message to indicate the NR sidelink communication transmission resources required by the UE in accordance with 5.8.3.3; 2> else: 3> if the last transmission of the SidelinkUEInformationNR message included sl-TxResourceReqList: 4> initiate transmission of the SidelinkUEInformationNR message to indicate it no longer requires NR sidelink communication transmission resources in accordance with 5.8.3.3; 2> if configured by upper layer to receive NR sidelink non-relay discovery messages on the frequency included in sl-FreqInfoList in SIB12 of the PCell including sl-NonRelayDiscovery: 3> if the UE did not transmit a SidelinkUEInformationNR message since last entering RRC_CONNECTED state; or 3> if since the last time the UE transmitted a SidelinkUEInformationNR message the UE connected to a PCell not providing SIB12 including sl-ConfigCommonNR or connected to a PCell providing SIB12 but not including sl-NonRelayDiscovery; or 3> if the last transmission of the SidelinkUEInformationNR message did not include sl-RxInterestedFreqListDisc; or if the frequency configured by upper layers to receive NR sidelink non-relay discovery messages on has changed since the last transmission of the SidelinkUEInformationNR message: 4> initiate transmission of the SidelinkUEInformationNR message to indicate the NR sidelink discovery reception frequency of interest in accordance with 5.8.3.3; 2> else: 3> if the last transmission of the SidelinkUEInformationNR message included sl-RxInterestedFreqListDisc: 4> initiate transmission of the SidelinkUEInformationNR message to indicate it is no longer interested in NR sidelink non-relay discovery messages reception in accordance with 5.8.3.3; 2> if configured by upper layer to receive NR sidelink L2 U2N relay discovery messages on the frequency included in sl-FreqInfoList in SIB12 of the PCell including sl-L2U2N-Relay; or if configured by upper layer to receive NR sidelink L3 U2N relay discovery messages on the frequency included in sl-FreqInfoList in SIB12 of the PCell including sl-L3U2N-RelayDiscovery; 2> or if configured by upper layer to receive NR sidelink U2U relay discovery messages on the frequency included in sl-FreqInfoList in SIB12 of the PCell including [FFS gNB capability indication]: 3> if the UE did not transmit a SidelinkUEInformationNR message since last entering RRC_CONNECTED state; or 3> if since the last time the UE transmitted a SidelinkUEInformationNR message the UE connected to a PCell not providing SIB12 including sl-ConfigCommonNR; or connected to a PCell providing SIB12 but not including sl-L2U2N-Relay in case of L2 U2N relay operation; or connected to a PCell providing SIB12 but not including sl-L3U2N-RelayDiscovery in case of L3 U2N relay operation; or 3> if since the last time the UE transmitted a SidelinkUEInformationNR message the UE connected to a PCell providing SIB12 but not including [FFS gNB capability indication] in case of U2U relay operation; or 3> if the last transmission of the SidelinkUEInformationNR message did not include sl-RxInterestedFreqListDisc; or if the frequency configured by upper layers to receive NR sidelink discovery messages on has changed since the last transmission of the SidelinkUEInformationNR message: 4> if the UE is capable of U2N Relay UE, and if SIB12 includes sl-RelayUE-ConfigCommon; or 4> if the UE is selecting a U2N Relay UE / has a selected U2N Relay UE, and if SIB12 includes sl-RemoteUE-ConfigCommon; or 4> if the UE is capable of U2U Relay UE, and if SIB12 includes sl-RelayUE-ConfigCommonU2U; or 4> if the UE is selecting a U2U Relay UE / has a selected U2U Relay UE, and if SIB12 includes sl-RemoteUE-ConfigCommonU2U: 5> initiate transmission of the SidelinkUEInformationNR message to indicate the NR relay sidelink discovery reception frequency of interest in accordance with 5.8.3.3; 2> else: 3> if the last transmission of the SidelinkUEInformationNR message included sl-RxInterestedFreqListDisc: 4> initiate transmission of the SidelinkUEInformationNR message to indicate it is no longer interested in NR relay sidelink discovery messages reception in accordance with 5.8.3.3; 2> if configured by upper layer to transmit NR sidelink non-relay discovery messages on the frequency included in sl-FreqInfoList in SIB12 of the PCell including sl-NonRelayDiscovery: 3> if the UE did not transmit a SidelinkUEInformationNR message since last entering RRC_CONNECTED state; or 3> if since the last time the UE transmitted a SidelinkUEInformationNR message the UE connected to a PCell not providing SIB12 including sl-ConfigCommonNR or connected to a PCell providing SIB12 but not including sl-NonRelayDiscovery; or 3> if the last transmission of the SidelinkUEInformationNR message did not include sl-TxResourceReqListDisc; or if the information carried by the sl-TxResourceReqListDisc has changed since the last transmission of the SidelinkUEInformationNR message: 4> initiate transmission of the SidelinkUEInformationNR message to indicate the NR sidelink non-relay discovery messages resources required by the UE in accordance with 5.8.3.3; 2> else: 3> if the last transmission of the SidelinkUEInformationNR message included sl-TxResourceReqListDisc: 4> initiate transmission of the SidelinkUEInformationNR message to indicate it no longer requires NR sidelink non-relay discovery messages resources in accordance with 5.8.3.3; 2> if configured by upper layer to transmit NR sidelink L2 U2N relay discovery messages on the frequency included in sl-FreqInfoList in SIB12 of the PCell including sl-L2U2N-Relay; or if configured by upper layer to transmit NR sidelink L3 U2N relay discovery messages on the frequency included in sl-FreqInfoList in SIB12 of the PCell including sl-L3U2N-RelayDiscovery; or 2> if configured by upper layer to transmit NR sidelink U2U relay discovery messages on the frequency included in sl-FreqInfoList in SIB12 of the PCell including [FFS gNB capability indication]: 3> if the UE did not transmit a SidelinkUEInformationNR message since last entering RRC_CONNECTED state; or 3> if since the last time the UE transmitted a SidelinkUEInformationNR message the UE connected to a PCell not providing SIB12 including sl-ConfigCommonNR; or connected to a PCell providing SIB12 but not including sl-L2U2N-Relay in case of L2 U2N relay operation; or connected to a PCell providing SIB12 but not including sl-L3U2N-RelayDiscovery in case of L3 U2N relay operation; or 3> if since the last time the UE transmitted a SidelinkUEInformationNR message the UE connected to a PCell providing SIB12 but not including [FFS gNB capability indication] in case of U2U relay operation; or 3> if the last transmission of the SidelinkUEInformationNR message did not include sl-TxResourceReqListDisc; or if the information carried by the sl-TxResourceReqListDisc has changed since the last transmission of the SidelinkUEInformationNR message: 4> if the UE is capable of U2N Relay UE, and if SIB12 includes sl-RelayUE-ConfigCommon, and if the U2N Relay UE threshold conditions as specified in 5.8.14.2 are met; or 4> if the UE is selecting a U2N Relay UE / has a selected U2N Relay UE/ configured with measurement object associated to L2 U2N Relay UEs, and if SIB12 includes sl-RemoteUE-ConfigCommon, and if the U2N Remote UE threshold conditions as specified in 5.8.15.2 are met; or 4> if the UE is capable of U2U Relay UE, and if SIB12 includes sl-RelayUE-ConfigCommonU2U, and if the U2U Relay UE threshold conditions as specified in 5.8.16.2 are met; or 4> if the UE is selecting a U2U Relay UE / has a selected U2U Relay UE, and if SIB12 includes sl-RemoteUE-ConfigCommonU2U, and if the U2N Remote UE threshold conditions as specified in 5.8.17.2 are met: 5> initiate transmission of the SidelinkUEInformationNR message to indicate the NR sidelink relay discovery messages resources required by the UE in accordance with 5.8.3.3; 2> else: 3> if the last transmission of the SidelinkUEInformationNR message included sl-TxResourceReqListDisc: 4> initiate transmission of the SidelinkUEInformationNR message to indicate it no longer requires NR sidelink relay discovery messages resources in accordance with 5.8.3.3; 2> if configured by upper layer to transmit NR sidelink L2 U2N relay communication on the frequency included in sl-FreqInfoList in SIB12 of the PCell including sl-L2U2N-Relay; or if configured by upper layer to transmit NR sidelink L3 U2N relay communication on the frequency included in sl-FreqInfoList in SIB12 of the PCell including sl-L3U2N-RelayDiscovery; or 2> if configured by upper layer to transmit NR sidelink L2 U2U relay communication on the frequency included in sl-FreqInfoList in SIB12 of the PCell including [FFS gNB capability indication]: 3> if the UE did not transmit a SidelinkUEInformationNR message since last entering RRC_CONNECTED state; or 3> if since the last time the UE transmitted a SidelinkUEInformationNR message the UE connected to a PCell not providing SIB12 including sl-ConfigCommonNR; or connected to a PCell providing SIB12 but not including sl-L2U2N-Relay in case of L2 U2N relay operation; or connected to a PCell providing SIB12 but not including sl-L3U2N-RelayDiscovery in case of L3 U2N relay operation; or 3> if since the last time the UE transmitted a SidelinkUEInformationNR message the UE connected to a PCell providing SIB12 but not including [FFS gNB capability indication] in case of L2 U2U relay operation; or 3> if the last transmission of the SidelinkUEInformationNR message did not include sl-TxResourceReqL2U2N-Relay; or if the information carried by the sl-TxResourceReqL2U2N-Relay has changed since the last transmission of the SidelinkUEInformationNR message; or if the last transmission of the SidelinkUEInformationNR message did not include sl-TxResourceReqL3U2N-Relay; or if the information carried by the sl-TxResourceReqL3U2N-Relay has changed since the last transmission of the SidelinkUEInformationNR message; or 3> if the last transmission of the SidelinkUEInformationNR message did not include sl-TxResourceReqL2U2U-Relay; or if the information carried by the sl-TxResourceReqL2U2U-Relay has changed since the last transmission of the SidelinkUEInformationNR message; or 3> if configured by upper layers not to transmit either NR sidelink L2 U2N relay communication or NR sidelink L3 U2N relay communication, and if the last transmission of the SidelinkUEInformationNR message includes both sl-TxResourceReqL2U2N-Relay and sl-TxResourceReqL3U2N-Relay: 4> if the UE is capable of U2N Relay UE, and if SIB12 includes sl-RelayUE-ConfigCommon, and if the U2N Relay UE threshold conditions as specified in 5.8.14.2 are met; or 4> if the UE is selecting a U2N Relay UE / has a selected U2N Relay UE, and if SIB12 includes sl-RemoteUE-ConfigCommon, and if the U2N Remote UE threshold conditions as specified in 5.8.15.2 are met; or 4> if the UE is capable of L2 U2U Relay UE, and if SIB12 includes sl-RelayUE-ConfigCommonU2U, and if the U2U Relay UE threshold conditions as specified in 5.8.16.2 are met; or 4> if the UE is selecting a L2 U2U Relay UE / has a selected U2U Relay UE, and if SIB12 includes sl-RemoteUE-ConfigCommonU2U, and if the U2N Remote UE threshold conditions as specified in 5.8.17.2 are met: 5> initiate transmission of the SidelinkUEInformationNR message to indicate the NR sidelink relay communication transmission resources required by the UE in accordance with 5.8.3.3; 2> else: 3> if the last transmission of the SidelinkUEInformationNR message included sl-TxResourceReqL2U2N-Relay or sl-TxResourceReqL3U2N-Relay: 4> initiate transmission of the SidelinkUEInformationNR message to indicate it no longer requires NR sidelink relay communication transmission resources in accordance with 5.8.3.3; 2> if configured by upper layers to perform NR sidelink reception on the frequency included in sl-FreqInfoList/sl-FreqInfoListSizeExt in SIB12 of the PCell and if sl-DRX-ConfigCommonGC-BC is included in SIB12-IEs: 3> if the UE received a sidelink DRX configuration in the RRCReconfigurationSidelink message for NR sidelink unicast reception from the associated peer UE and the UE accepted the sidelink DRX configuration: 4> if the UE did not transmit a SidelinkUEInformationNR message since last entering RRC_CONNECTED state; or 4> if since the last time the UE transmitted a SidelinkUEInformationNR message the UE connected to a PCell not providing SIB12 including sl-DRX-ConfigCommonGC-BC; or 4> if the last transmission of the SidelinkUEInformationNR message did not include sl-RxDRX-ReportList; or if the information carried by sl-RxDRX-ReportList has changed since the last transmission of the SidelinkUEInformationNR message: 5> initiate transmission of the SidelinkUEInformationNR message to report the sidelink DRX configuration in accordance with 5.8.3.3; 3> else: 4> if the last transmission of the SidelinkUEInformationNR message included sl-RxDRX-ReportList: 5> initiate transmission of the SidelinkUEInformationNR message to indicate the sidelink DRX configuration is no longer used in accordance with 5.8.3.3; 3> if the UE is performing NR sidelink groupcast or broadcast reception and is interested in a service that sidelink DRX is applied: 4> if the UE did not transmit a SidelinkUEInformationNR message since last entering RRC_CONNECTED state; or 4> if since the last time the UE transmitted a SidelinkUEInformationNR message the UE connected to a PCell not providing SIB12 including sl-DRX-ConfigCommonGC-BC; or 4> if the last transmission of the SidelinkUEInformationNR message did not include sl-RxInterestedGC-BC-DestList; or if the information carried by sl-RxInterestedGC-BC-DestList has changed since the last transmission of the SidelinkUEInformationNR message: 5> initiate transmission of the SidelinkUEInformationNR message to report the Destination Layer-2 ID and QoS profile(s) associated with the service(s) in accordance with 5.8.3.3; 3> else: 4> if the last transmission of the SidelinkUEInformationNR message included sl-RxInterestedGC-BC-DestList: 5> initiate transmission of the SidelinkUEInformationNR message to indicate it is no longer interested in the service that sidelink DRX is applied in accordance with 5.8.3.3; 2> if configured by upper layers to perform NR sidelink transmission on the frequency included in sl-FreqInfoList in SIB12 of the PCell and if sl-DRX-ConfigCommonGC-BC is included in SIB12-IEs and if the UE is configured with sl-ScheduledConfig: 3> if the UE received a sidelink DRX assistance information or a sidelink DRX configuration reject information from the associated peer UE for NR sidelink unicast transmission: 4> if the UE did not transmit a SidelinkUEInformationNR message since last entering RRC_CONNECTED state; or 4> if since the last time the UE transmitted a SidelinkUEInformationNR message the UE connected to a PCell not providing SIB12 including sl-DRX-ConfigCommonGC-BC; or 4> if the last transmission of the SidelinkUEInformationNR message did not include sl-DRX-InfoFromRxList, sl-FailureList or sl-CarrierFailureList; or if the information carried by sl-DRX-InfoFromRxList, sl-FailureList or sl-CarrierFailureList has changed since the last transmission of the SidelinkUEInformationNR message: 5> initiate transmission of the SidelinkUEInformationNR message to report the sidelink DRX assistance information or the sidelink DRX configuration reject information in accordance with 5.8.3.3; NOTE: After including the SL-DRX reject information in sl-FailureList in the last transmission of the SidelinkUEInformationNR message, it is up to UE implementation to consider another sidelink DRX rejection of a new SL DRX configuration from the same associated peer UE as "change" of sl-FailureList. 3> if the UE is performing NR sidelink groupcast transmission: 4> if the UE did not transmit a SidelinkUEInformationNR message since last entering RRC_CONNECTED state; or 4> if since the last time the UE transmitted a SidelinkUEInformationNR message the UE connected to a PCell not providing SIB12 including sl-DRX-ConfigCommonGC-BC; or 4> if the last transmission of the SidelinkUEInformationNR message did not include sl-DRX-Indication; or if the information carried by sl-DRX-Indication has changed since the last transmission of the SidelinkUEInformationNR message: 5> initiate transmission of the SidelinkUEInformationNR message to report sidelink DRX on/off indication for the corresponding destination in accordance with 5.8.3.3; 1> if SIB23 including sl-PosConfigCommonNR is provided by the PCell: 2> if configured to receive sidelink control information for SL-PRS on the frequency included in sl-FreqInfoList in SIB23 of the PCell: 3> if the UE did not transmit a SidelinkUEInformationNR message since last entering RRC_CONNECTED state; or 3> if since the last time the UE transmitted a SidelinkUEInformationNR message the UE connected to a PCell not providing SIB23 including sl-PosConfigCommonNR; or 3> if the last transmission of the SidelinkUEInformationNR message did not include sl-PosRxInterestedFreqList; or if the frequency configured to receive sidelink control information for SL-PRS has changed since the last transmission of the SidelinkUEInformationNR message: 4> initiate transmission of the SidelinkUEInformationNR message to indicate the frequency of interest for SL-PRS transmission in accordance with 5.8.3.3 and to request configured grant; 2> else: 3> if the last transmission of the SidelinkUEInformationNR message included sl-PosRxInterestedFreqList: 4> initiate transmission of the SidelinkUEInformationNR message to indicate it is no longer interested in SL-PRS reception in accordance with 5.8.3.3; 2> if configured to transmit SL-PRS on the frequency included in sl-FreqInfoList in SIB23 of the PCell: 3> if the UE did not transmit a SidelinkUEInformationNR message since last entering RRC_CONNECTED state; or 3> if since the last time the UE transmitted a SidelinkUEInformationNR message the UE connected to a PCell not providing SIB23 including sl-PosConfigCommonNR; or 3> if the last transmission of the SidelinkUEInformationNR message did not include sl-PosTxResourceReqList; or if the information carried by the sl-PosTxResourceReqList has changed since the last transmission of the SidelinkUEInformationNR message: 4> initiate transmission of the SidelinkUEInformationNR message to indicate the NR sidelink positioning transmission resources required by the UE in accordance with 5.8.3.3; 2> else: 3> if the last transmission of the SidelinkUEInformationNR message included sl-PosTxResourceReqList: 4> initiate transmission of the SidelinkUEInformationNR message to indicate it no longer requires NR sidelink positioning transmission resources in accordance with 5.8.3.3;