Abstract: Methods, apparatuses, devices, and procedures for local wireless transmit/receive unit (WTRU)-to-WTRU relay soft reselection are provided. A WTRU detects degradation in a first link with a first relay WTRU. The WTRU identifies one or more candidate relay WTRUs. The WTRU transmits a first link modification request (LMR) message to the first relay WTRU. The first LMR message is indicative of at least one of: a relay reselection indication or one or more candidate relay WTRUs. The first relay WTRU establishes a second link with a candidate relay WTRU from the one or more candidate relay WTRUs. The WTRU receives a first link modification accept (LMA) message from the first relay WTRU. The first LMA message is indicative of at least one of: the relay reselection indication and/or an acknowledgement of establishment of the second link. The WTRU transmits a link modification notification (LMN) message to one or more downstream WTRUs.

Abstract: Methods, apparatuses, devices, and procedures for wireless transmit/receive unit (WTRU)-to-WTRU relay reselection with integrated discovery are provided. A WTRU detects failure of a first link with a first relay WTRU. The WTRU determines, based on a unicast routing table, one or more peer WTRUs routable via the first relay WTRU. The WTRU establishes a second link with a second relay WTRU capable of routing to the one or more peer WTRUs. The WTRU transmits a direct communication request (DCR) message and/or a link modification request (LMR) message to the second relay WTRU. The WTRU receives, from the second relay WTRU, a direct communication accept (DCA) message and/or a link modification accept (LMA) message. The WTRU transmits a link modification notification (LMN) message to the one or more peer WTRUs via the second relay WTRU.

Abstract: A wireless transmit/receive unit (WTRU)-to-WTRU relay (Relay1) may be configured to receive a first message from a source WTRU (WTRU1), store a route entry to WTRU1 in a unicast routing table, send a second message to a second WTRU-to-WTRU relay (Relay2), receive a third message from Relay2, store a route entry to WTRU2 in the unicast routing table, store an association of a user information identification (ID) of WTRU2 and the IP address of WTRU2, store an IP route entry to WTRU2 in a unicast IP routing table, send a fourth message to WTRU1, store an association of a user information ID of WTRU1 and the IP address of WTRU1, store an IP route entry to WTRU1 in the unicast IP routing table, and send a fifth message to WTRU2 via Relay2.

Abstract: A wireless transmit receive unit (WTRU) and methods are disclosed for mitigating radar interference with uplink control channels may include receiving configuration information including a set of dedicated physical uplink control channel (PUCCH) resources for scheduling requests (SRs), the set includes first PUCCH resources of an UL BWP, and second PUCCH resources of the UL BWP different from the first PUCCH resources. SRs are sent using the first PUCCH resources while the second PUCCH resources are suspended from use. The WTRU receives signaling from a network to suspend one or more of the first PUCCH resources, and unsuspend one or more of the second PUCCH resources. Thereafter, subsequent SRs are sent using only unsuspended PUCCH resources of the UL BWP and not the suspended PUCCH resources, in response to the received signaling from the network. Additional embodiment are disclosed.

Abstract: Examples for ensuring robust SRS transmission and reception can occur when coexisting with interference include moving WTRU SRS transmissions out of the interference band to mitigate interference to and from the interferer, increasing the number of OFDM symbols and/or the repetition factor for SRS to overcome the interference, dynamic switching/suspending of semi-persistent SRS and/or aperiodic SRS to mitigate interference to and from the interferer, and power boosting of SRS transmissions to overcome the interference.

Abstract: The system and method detect at least one cell defining SSB (CD-SSB), extract information associated with at least one other CD-SSB, the information including at least the absoluteFrequencyotherSSBs for the at least one other CD-SSB, extract an absoluteFrequencySSB from a network, determine if absoluteFequencySSB is in a list of absoluteFrequencyotherSSBs and if so, the CD-SSB indicated by the absoluteFrequencySSB, read the SIB1 associated with the CD-SSB indicated by the absoluteFrequencySSB and perform random access using RACH resources corresponding to the read SIB1. The system and method may further include if the absoluteFrequencySSB is determined to not be in the list of absoluteFrequencyotherSSBs, read at least one SIB1 associated with at least one other CD-SSB indicated by an absoluteFrequencyotherSSB in the list of absoluteFrequencyotherSSBs and perform random access using RACH resources corresponding to the read at least one SIB1.

Abstract: A wireless transmit receive unit (WTRU) and methods are disclosed for mitigating narrowband interference on sidelink communications. The method may include: receiving, at a WTRU, SCI, the SCI including information indicating at least one alternative TxRP different from the TxRP used for SCI is transmission, reserving, at the WTRU, resources on the at least one alternative TxRP according to the information indicated by the received SCI; and transmitting, by the WRTU, at least one of: a PSCCH, and a PSSCH, alone or in combination, via the reserved resources for a Hybrid Automatic Repeat Request HARQ transmission or HARQ retransmission, or a PSFCH for HARQ feedback, on the at least one alternative TxRP. The method may also include determining a rank of PSSCH transmission based on a CSI-RS, determining to apply PSSCH layer aggregation according to a channel quality when the determined rank is greater than 1.

Abstract: Methods are described for ensuring robust S-SS/PSBCH blocks (S-SSBs) reception on the sidelink in the presence of high-power narrowband interference include frequency hopped S-SSB transmission to mitigate high-power narrowband interference such that if one frequency location of S-SSBs is corrupted by the high-power narrowband interference, the other frequency location(s) of the S-SSBs may not be affected.

Abstract: A wireless transmit receive unit (WTRU) and methods for enhancing PUSCH frequency hopping transmission in the presence narrowband interferes are disclosed. The method may include: by a network element, determining an interference signal, determining the interference signal is equal to or greater than a threshold value, determining one or more WTRUs capable of incurring the interference signal at a level equal to or greater than the threshold value, generating information indicating PRB exclusion, generating a signal to trigger the PUSCH frequency hopping with PRB exclusion; and, by one or more WTRUs, receiving the information indicating the PRB exclusion, storing the information indicating the PRB exclusion, receiving the signal to trigger the PUSCH frequency hopping with PRB exclusion, retrieving a most recently stored information indicating the PRB exclusion when the signal to trigger the PUSCH frequency hopping with PRB exclusion is received, and transmitting a frequency hopping PUSCH with PRB exclusion.

Abstract: A wireless transmit receive unit (WTRU) and methods are disclosed for mitigating radar interference on PUSCH transmission. The method may include: transmitting a message informing a network of PUSCH MIMO layer aggregation capability; receiving a MIMO rank; receiving an indication to use PUSCH MIMO layer aggregation; determining a PUSCH layer aggregation level based on the MIMO rank; and transmitting multiple redundancy versions of a PUSCH codeword comprising one or more code blocks based on the PUSCH layer aggregation level. The WTRU may be configured to transmit a message informing a network of PUSCH MIMO layer aggregation capability; receive a MIMO rank; receive an indication to use PUSCH MIMO layer aggregation; determine a PUSCH layer aggregation level based on the MIMO rank; and transmit multiple redundancy versions of a PUSCH codeword comprising one or more code blocks based on the PUSCH layer aggregation level.

Abstract: Examples for ensuring robust SRS transmission and reception can occur when coexisting with interference include moving WTRU SRS transmissions out of the interference band to mitigate interference to and from the interferer, increasing the number of OFDM symbols and/or the repetition factor for SRS to overcome the interference, dynamic switching/suspending of semi-persistent SRS and/or aperiodic SRS to mitigate interference to and from the interferer, and power boosting of SRS transmissions to overcome the interference.

Abstract: A wireless transmit receive unit (WTRU) and methods are disclosed for mitigating radar interference with transmission and reception of RACH preambles. According to a first aspect, one or more first RACH preambles are transmitted based on a first RACH configuration. The WTRU may receive an RAR with an indication that the first RACH configuration is unavailable. The WTRU may then retrieve a second RACH configuration information. The WTRU may then transmit one or more second RACH preambles based on the second RACH configuration and then completes a random access procedure based on the second RACH configuration.

Abstract: Methods and devices are disclosed to configure a wireless transmit receive unit (WTRU) with multiple physical downlink control channel (PDCCH) control resource sets (CORESETs) including at least a first PDCCH CORESET identifying first frequency resources of a downlink (DL) bandwidth part (BWP) for detection of downlink control information (DCI) and a second PDCCH CORESET identifying second frequency resources of the DL BWP for detection of DCI. The WTRU monitors one or more search spaces linked to active PDCCH CORSETs for transmissions of DCI. On determination that an interferer may impact PDCCH resources, a network sends, and a WTRU receives, signaling to suspend monitoring of search spaces linked to one of the first PDCCH CORSET or the second PDCCH CORESET for a suspend time period. Upon expiration of the suspend time period or sending/receiving unsuspend signaling, the WTRU resumes monitoring search spaces linked to a previously suspended PDCCH CORESET.

Abstract: A wireless transmit receive unit (WTRU) and methods are disclosed for mitigating radar interference with uplink control channels may include receiving configuration information including a set of dedicated physical uplink control channel (PUCCH) resources for scheduling requests (SRs), the set includes first PUCCH resources of an UL BWP, and second PUCCH resources of the UL BWP different from the first PUCCH resources. SRs are sent using the first PUCCH resources while the second PUCCH resources are suspended from use. The WTRU receives signaling from a network to suspend one or more of the first PUCCH resources, and unsuspend one or more of the second PUCCH resources. Thereafter, subsequent SRs are sent using only unsuspended PUCCH resources of the UL BWP and not the suspended PUCCH resources, in response to the received signaling from the network. Additional embodiment are disclosed.

Abstract: The system and method detect at least one cell defining SSB (CD-SSB), extract information associated with at least one other CD-SSB, the information including at least the absoluteFrequencyotherSSBs for the at least one other CD-SSB, extract an absoluteFrequencySSB from a network, determine if absoluteFequencySSB is in a list of absoluteFrequencyotherSSBs and if so, the CD-SSB indicated by the absoluteFrequencySSB, read the SIB1 associated with the CD-SSB indicated by the absoluteFrequencySSB and perform random access using RACH resources corresponding to the read SIB1. The system and method may further include if the absoluteFrequencySSB is determined to not be in the list of absoluteFrequencyotherSSBs, read at least one SIB1 associated with at least one other CD-SSB indicated by an absoluteFrequencyotherSSB in the list of absoluteFrequencyotherSSBs and perform random access using RACH resources corresponding to the read at least one SIB1.