Abstract: A method for performing resource determination for transmission, by a User Equipment, UE, in a telecommunication network, wherein said method comprises the steps of receiving, by said UE, from at least one UE in said telecommunication network, a resource coordination message in device-to-device, D2D, based transmissions, wherein said resource coordination message comprises a resource information to be taken into account by said UE when determining resources for transmission, determining, by said UE, a trustworthiness value for each of said at least one UE separately, wherein said trustworthiness value indicates a trustworthiness of a particular UE and determining resources for said transmission based on said resource information and said determined trustworthiness value for each of said at least one UE separately.

Abstract: Systems and methods are disclosed for resource selection in sidelink communications. In one embodiment, a method performed by a wireless communication device (WCD) for resource selection for a sidelink transmission comprises performing channel sensing of a channel to be used for sidelink transmission, determining a first set of resources that are available or not available from a perspective of the WCD based on results of performing the channel sensing, receiving one or more resource coordination messages from one or more neighboring WCDs, determining one or more second set of resources that are available or not available from perspectives of the one or more neighboring WCDs based on information comprised in the one or more resource coordination messages, and performing resource selection for a sidelink transmission based on the first set of resources and the one or more second sets of resources.

Abstract: Systems and methods for coordination of periodic and aperiodic sensing for autonomous (e.g., sidelink) transmission are disclosed herein. In one embodiment, a method performed by a wireless communication device (WCD) comprises starting periodic sensing, where the periodic sensing comprises sensing during a plurality of periodic sensing occasions. The method further comprises, after starting the periodic sensing, detecting a triggering event for an aperiodic sensing occasion and adapting the aperiodic sensing occasion, one or more of the plurality of periodic sensing occasions, or both the aperiodic sensing occasion and the one or more of the plurality of periodic sensing occasions. In this manner, coordination of periodic and aperiodic sensing can be provided. Corresponding embodiments of a WCD are also disclosed.

Abstract: The present disclosure provides a method in a first terminal device. The method includes: initiating a first transmission on a first resource; reserving a second resource for a second transmission; and initiating the second transmission on the second resource. The first resource and the second resource are separated by at least a time gap to enable a second terminal device that is to reserve or has reserved the second resource to trigger a resource reselection in response to sensing the first transmission within the time gap.

Abstract: Embodiments of the present disclosure provide a method (1200) for congestion control during sidelink transmissions. The method (1200) is performed by a user equipment, UE (1300), in a wireless communication network. The method (1200) comprises determining (1220) that the UE is actively receiving in a subset of resources during a time interval and estimating (1240) a congestion control metric for the time interval during which the UE is actively receiving in the subset of resources. The method (1200) comprises selecting (1260) one or more transmission parameters to use for sidelink transmissions in accordance with the estimated congestion control metric. Further, the method (1200) comprises performing (1280) sidelink transmission using the selected one or more transmission parameters. Corresponding UE, and computer program products are also disclosed.

Abstract: A method, system and apparatus are disclosed for wake-up signal and go-to-sleep signal for sidelink communications. In one embodiment, a wireless device is configured to monitor a power saving signal for the SL DRX on at least one resource within a set of dedicated resources at a physical sidelink feedback channel, PSFCH, occasion. In one embodiment, a wireless device is configured to transmit, to a further WD, a power saving signal for the SL DRX on at least one resource within a set of dedicated resources at a physical sidelink feedback channel, PSFCH, occasion.

Abstract: A resource pool for selection of radio resources for D2D transmissions by wireless communication devices is divided into multiple subsets (S1, S2, S3) of radio resources which are each associated with at least one of multiple types of selection mechanisms. Depending on which of the multiple types of selection mechanisms is applied by a wireless communication device for selection of radio resources for D2D transmissions, the wireless communication device performs prioritization of the subsets (S1, S2, S3). Based on the prioritization of the subsets (S1, S2, S3), the wireless communication device selects at least on radio resource from the resource pool. Further, the wireless communication device performs one or more D2D transmissions on the selected at least one radio resource.

Abstract: Methods for enabling inter-User Equipment (UE) resource coordination are provided. More specifically, methods performed by a receiving device and a transmitting device for enabling inter-UE resource coordination are provided. The methods disclosed herein can help achieve a sound tradeoff between benefits of resource coordination and overhead associated with resource coordination. Specifically, the methods can help reduce network load and ineffective resource coordination message, obtain better suggestion in terms of rules and formats of the resource coordination message, and create a framework for combining different types of resource coordination formats.

Abstract: A D2D communication device sends a synchronization signal to enable synchronization of one or more other D2D communication devices. The D2D communication device provides the synchronization signal with an indication that the synchronization signal is derived from a D2D communication device configured as a synchronization master which, when not being synchronized to an external synchronization reference, has a higher priority to be used as a synchronization source than other D2D communication devices not synchronized to an external synchronization reference.

Abstract: A method, system, and apparatus are disclosed. In one or more embodiments, a wireless device is provided. The wireless device includes processing circuitry configured to determine whether at least one of a plurality of transmission resources associated with a first wireless device is part of a resource conflict, and cause transmission of resource coordination information that indicates the determination whether the at least one of a plurality of transmission resources associated with the first wireless device is part of the resource conflict.

Abstract: A wireless communication device (10) configures a selection window and a sensing window. The selection window indicates radio resources allowed to be selected by the wireless communication device for a D2D transmission by the wireless communication device (10) and the sensing window indicates which radio resources are to be used for estimating an occupation status of the radio resources in the selection window. By monitoring the radio resources indicated by the sensing window, the wireless communication device (10) estimates the occupation status of the radio resources in the selection window. Based on the estimated occupation status of the radio resources in the selection window, the wireless communication device (10) selects radio resources from the selection window. Using the selected radio resources, the wireless communication device (10) performs at least one D2D transmission to at least one further wireless communication device (10).

Abstract: A wireless communication device obtains configuration information defining multiple geographical areas. Further, the wireless communication device sends an outgoing D2D transmission. The outgoing D2D transmission comprises an area identifier to identify one of the geographical areas as target geographical area of the outgoing D2D transmission and to address the outgoing D2D transmission to one or more wireless communication devices in the identified target geographical area of the outgoing D2D transmission.

Abstract: A D2D communication device (10) receives a D2D communication message transmitted on a direct wireless link (21) from a first other D2D communication device (10) to a second other D2D communication device (10). The D2D communication message comprises at least one identifier of the first other D2D communication device. Based on the at least one identifier, the D2D communication device controls establishment of a direct wireless link (22) between the D2D communication device (10) and the first other D2D communication device (10).

Abstract: Embodiments described herein relate to methods and apparatus for communicating between devices using sidelinks. There is provided a method performed by a transmitting device for transmitting a packet to a destination device. The method comprises duplicating the packet and adding header information to form duplicated modified packets, each having a respective duplication identifier. Multiple wireless pathways to the destination device are determined, each wireless pathway comprising a sidelink. The duplicated modified packets are transmitted onto respective wireless pathways.

Abstract: The present disclosure provides methods for link selection in a telecommunication system, a user equipment, a network node, and a telecommunication system. The method comprises: communicating a probing message with a second UE via a relay link therebetween, both of the UEs being served by a same network node; determining whether uplink (UL) data is to be transmitted to the network node via the relay link or via an access link between the UE and the network node at least partially based on the link quality of the relay link, which is determined at least partially based on the probing message, and the link quality of the access link, or based on an indication from the network node; and transmitting the UL data via the determined one of the relay link and the access link.

Abstract: Embodiments include methods, performed by a user equipment (UE), for hybrid ARQ (HARQ) feedback in relation to multicast transmissions from a network node in a radio access network (RAN). Such methods include receiving, from the network node, first downlink control information (DCI) scheduling a first multicast transmission associated with the UE and determining a HARQ feedback mode for the first multicast transmission. Such methods also include, based on the first DCI, attempting to decode the first multicast transmission; and selectively transmitting HARQ feedback related to the first multicast transmission to the network node based on the determined HARQ feedback mode and on whether the attempt to decode is successful or unsuccessful. Embodiments also include complementary methods for a network node, as well as UEs and network nodes configured to perform such methods.

Abstract: Target based control of synchronization signals in D2D communication A radio device detects (11) at least one first synchronization signal from one or more further radio devices (12, 13). Depending on the at least one detected first synchronization signal, the radio device (11) selects at least one of the one or more further radio devices (12, 13). Further, the radio device (11) transmits a second synchronization signal, excluding the selected at least one further radio device (12) as a transmission target of the second synchronization signal.

Abstract: Power control for a bidirectional Sidelink (SL) is provided. Solutions proposed herein limit the Physical SL Feedback Channel (PSFCH) transmit power level to that of the power level used for Physical SL Shared Channel (PSSCH) so as to prohibit too high transmit power for the PSFCH. In addition, if the difference between the PSSCH and PSFCH exceeds a preconfigured threshold (e.g., the PSFCH is too low), a Receiver (Rx) User Equipment (UE) can take preventive actions that ensure sufficient quality over the PSFCH. In further embodiments, both UEs continuously maintain the estimated SL Path Loss (PL) and transmit a single SL Channel State Information Reference Signal (SCSI-RS), and associated measurement reports rather than triggering new SCSI-RS transmissions and measurement reports for each PSSCH and associated PSFCH channel per SL (e.g., PC5) connection.

Abstract: A wireless device (12A) receives a data transmission (22) from a peer wireless device (12B) on a sidelink (20) between the wireless device (12A) and the peer wireless device (12B). The wireless device (12A) transmits, to the peer wireless device (12B), a sequence (26) that is based on an identity (32B) of the peer wireless device (12B). Transmission of the sequence (26) conveys acknowledgement feedback (24) for the data transmission (22).

Abstract: A first and second UE are connected via a PC5 unicast link. Both maintain a list of potential Side link relay UEs and agree on a common list of UEs that appear in both lists. When the first UE detects that the second UE has trouble receiving it's transmission, e.g. ack/nack timeout or high level of NACKs, decide to use a third UE from the common list as Side Link relay towards the second UE.