A wireless communication system, comprising: a plurality of user devices, UEs, configured for a sidelink communication using resources from a set of sidelink resources of the wireless communication system, wherein the plurality of UEs comprises at least one transmitting UE and at least one receiving UE, the transmitting UE and the receiving UE configured to use at least a subset of the sidelink resources of the wireless communication system for the sidelink communication, and wherein the wireless communication system is configured to allow a data duplication on the sidelink, and wherein, in case of a unicast transmission, data duplication is allowed responsive to one or more of • a number of decoding failures, e.g., indicated by a HARQ feedback, reaching or exceeding a first threshold, • an interference, e.g. based on interference originating from other UEs or gNBs, reaching or exceeding a second threshold, • a channel busy ratio, CBR, or wherein, in case of a groupcast or a multicast transmission, data duplication is allowed responsive to one or more of • an accumulated number of decoding failures, e.g., indicated by a HARQ feedback from one or more of the UEs of the group, reaching or exceeding a third threshold, • an interference reaching or exceeding a fourth threshold, e.g., an interference experienced by a UE group member, like an interference experienced by a group leader, GL, UE, or an interference experienced by a subset of UEs of the group, or an interference experienced by all UE group members, • a channel busy ratio, CBR, or wherein, in case of a broadcast transmission, data duplication is allowed responsive to • an interference, e.g. based on interference originating from other UEs or gNBs, reaching or exceeding a fifth threshold, • a channel busy ratio, CBR. a plurality of user devices, UEs, configured for a sidelink communication using resources from a set of sidelink resources of the wireless communication system, wherein the plurality of UEs comprises at least one transmitting UE and at least one receiving UE, the transmitting UE and the receiving UE configured to use at least a subset of the sidelink resources of the wireless communication system for the sidelink communication, and wherein the wireless communication system is configured to allow a data duplication on the sidelink, and wherein, in case of a unicast transmission, data duplication is allowed responsive to one or more of • a number of decoding failures, e.g., indicated by a HARQ feedback, reaching or exceeding a first threshold, • an interference, e.g. based on interference originating from other UEs or gNBs, reaching or exceeding a second threshold, • a channel busy ratio, CBR, or • a number of decoding failures, e.g., indicated by a HARQ feedback, reaching or exceeding a first threshold, • an interference, e.g. based on interference originating from other UEs or gNBs, reaching or exceeding a second threshold, • a channel busy ratio, CBR, or wherein, in case of a groupcast or a multicast transmission, data duplication is allowed responsive to one or more of • an accumulated number of decoding failures, e.g., indicated by a HARQ feedback from one or more of the UEs of the group, reaching or exceeding a third threshold, • an interference reaching or exceeding a fourth threshold, e.g., an interference experienced by a UE group member, like an interference experienced by a group leader, GL, UE, or an interference experienced by a subset of UEs of the group, or an interference experienced by all UE group members, • a channel busy ratio, CBR, or • an accumulated number of decoding failures, e.g., indicated by a HARQ feedback from one or more of the UEs of the group, reaching or exceeding a third threshold, • an interference reaching or exceeding a fourth threshold, e.g., an interference experienced by a UE group member, like an interference experienced by a group leader, GL, UE, or an interference experienced by a subset of UEs of the group, or an interference experienced by all UE group members, • a channel busy ratio, CBR, or wherein, in case of a broadcast transmission, data duplication is allowed responsive to • an interference, e.g. based on interference originating from other UEs or gNBs, reaching or exceeding a fifth threshold, • a channel busy ratio, CBR. • an interference, e.g. based on interference originating from other UEs or gNBs, reaching or exceeding a fifth threshold, • a channel busy ratio, CBR.