Abstract: A user device, UE, for a wireless communication system is described. The wireless communication system includes a plurality of user devices, UEs. The UE communicates with one or more transmitting UEs using a sidelink, supports a certain number of HARQ processes, and buffers one or more transmissions for each HARQ process. During a unicast communication with a transmitting UE using the sidelink, the UE receives from the transmitting UE a transmission during a transmission time interval, the transmission associated to control data, e.g. SCI, including a HARQ process ID, buffers the received transmission for the HARQ process, and combines the buffered transmissions prior to decoding. In case a successfully identified transmission is not buffered, the UE indicates to the transmitting UE that the transmission is not buffered at the UE.

Abstract: A wireless communication system includes one or more base stations, and one or more user devices, UEs. The base station transmits data to a UE being served by the base station, the data including control data and user data, the user data including at least first user data and second user data, the first user data associated with a first service and second data associated with second service, the first and second services having one or more different transmission requirements. Responsive to receiving in the control data a grant for a feedback transmission, the UE sends a feedback to the base station, the feedback indicating for one or more data blocks of the data a successful or non-successful reception at the UE. The control data includes a first downlink assignment index (DAI) associated with the first data, and a second DAI associated with the second data.

Abstract: A wireless communication system includes one or more base stations, and a plurality of UEs for a sidelink communication using sidelink resources. The UEs includes a transmitting UE and a receiving UE using a subset of the sidelink resources of the wireless communication system. The receiving UE sends over the sidelink a sidelink feedback to the transmitting UE. The sidelink feedback indicates for a data transmission a successful or non-successful reception at the receiving UE. The transmitting UE reports the sidelink feedback to a base station. The base station provides to the transmitting UE, responsive to the sidelink feedback, sidelink resources for a possible retransmission of a data packet over the sidelink to the receiving UE. The reporting of the sidelink feedback to the base station by the transmitting UE is activated or deactivated responsive to one or more conditions.

Abstract: A data communication apparatus, for transmitting one or more blocks of data within a frame including a two-dimensional grid of transmission symbol positions is configured to select a group of transmission symbol positions, which is a subset of the two-dimensional grid of transmission symbol positions, for a transmission of a data portion. The data communication apparatus is configured to select one or more reference symbol positions associated to the selected group of transmission symbol positions, out of a plurality of possibilities, based on an information describing a desired relative position of the reference symbol position with respect to the selected group of transmission symbol positions. Other apparatuses also use a flexible selection of transmission symbol positions and a flexible selection of reference symbol positions. A system, methods and computer programs are also described.

Abstract: An apparatus for a wireless communication system is describes. The wireless communication system includes one or more base stations and a plurality of user devices, UEs. The apparatus is configured to be connected to one or more UEs via a sidelink for a sidelink communication with the one or more UEs, the apparatus and the one or more UEs forming a group of UEs and using a set of group resources to be used for the sidelink communication within the group of UEs. In case a base station does not provide resource allocation configuration or assistance, the apparatus is configured to select resources from a set of resources provided by the wireless communication system so as to alter or completely change the set of group resources to be used for the sidelink communication within the group of UEs.

Abstract: A user device, UE, for a wireless communication system, is described. The UE may transmit and/or receive over a sidelink, SL, in the wireless communication system. Responsive to detecting one or more collisions on one or more resources used or reserved to be used by a further UE for one or more transmissions over the SL, the UE may transmit a collision indication, Cl, and an assistance information, like an assistance information message, AIM, the assistance information indicating one or more preferred and/or not preferred resources for a transmission by the further UE.

Abstract: Transmitter of a (type a) user equipment, UE, wherein the transmitter is configured for a sidelink transmission without sidelink reception; wherein the transmitter is configured to perform random resource selection for the sidelink transmission in a resource pool with random resource selection enabled, wherein the random resource selection is limited to a resource pool with disabled physical sidelink feedback channel.

Abstract: A user device, UE, for a wireless communication system, is described, which skips a certain number of control channel monitoring occasions, MOs, like physical downlink control channel, PDCCH, MOs, or a physical sidelink control channel, PSCCH, MOs, in accordance with a certain control channel MO skipping pattern.

Abstract: An apparatus for a wireless communication system includes one or more base stations and a plurality of user devices, UEs. The apparatus is configured to be connected to one or more UEs via a sidelink for a sidelink communication with the one or more UEs, the apparatus and the one or more UEs forming a group of UEs and using a set of group resources to be used for the sidelink communication within the group of UEs. In case a base station does not provide resource allocation configuration or assistance, the apparatus is configured to select resources from a set of resources provided by the wireless communication system so as to alter or completely change the set of group resources to be used for the sidelink communication within the group of UEs.

Abstract: Embodiments provide a transceiver, wherein the transceiver is configured to transmit or receive data in at least one transmission time interval on certain allocated resource elements of a wireless communication system, wherein the transceiver is configured to at least partially blank a transmission time interval for a data block to be transmitted or received by the transmitter, wherein the transceiver is configured (a) to signal to another transceiver a transmission grant in a blanked part of the at least partially blanked transmission time interval or (b) to at least partially blank the transmission time interval based on a blanking pattern received from another transceiver.

Abstract: A user device, UE, for a wireless communication network is described. The he UE performs measurements of one or more reference signals received from a network entity of the wireless communication network, each reference signal being associated with a TCI state. For transmitting or receiving a transmission associated with a certain TCI state, the UE uses one or more parameters obtained by the measurement of the reference signal being associated with the certain TCI state of the transmission. Responsive to a certain event, the UE resets parameters obtained by a measurement associated with the TCI state of at least one of the one or more reference signals.

Abstract: An apparatus for a wireless communication system is configured to be connected to at least one user device, UE, of the wireless communication system via a sidelink for a sidelink communication with the at least one UE. For a unicast transmission to the UE, the apparatus is configured to transmit a sidelink frame having a certain frame duration, a first part of the sidelink frame including a control signaling, the control signaling indicating to the UE whether a feedback is to be returned to the apparatus, the feedback indicating a successful reception of data at the UE and/or a sidelink channel condition. In case the feedback from the UE is desired, the apparatus is configured to transmit in the first part of the frame, using the control signaling, the indication that the feedback is to be provided by the UE such that a duration of the control signaling is shorter, by a remaining duration, than the frame duration, and receive from the UE, during the remaining duration, the feedback.

Abstract: A user equipment, UE, for a wireless communication network including one or more base stations, performs a transmission to a base station using a grant-free, GF, transmission scheme. The transmission being performed in accordance with a GF transmission configuration. The UE receives from the base station a certain signaling. The certain signaling indicates that the base station failed to identify the UE from the transmission. Responsive to the certain signaling from the base station, the UE retransmits the transmission in accordance with a GF retransmission configuration. The GF retransmission configuration is different from the GF transmission configuration.

Abstract: A user device, UE, for a wireless communication network is described that acts as a relaying entity so as to provide functionality to support connectivity between one or more transmitting entities and one or more receiving entities of the wireless communication network. The UE is to sets up one or more logical channels and/or one or more data bearers for a transmission of data from the UE to the one or more receiving entities based on the origin of the data.

Abstract: A user device, UE, for a wireless communication network, is described. The wireless communication network includes a plurality of user devices, UEs. The UE is to communicate with one or more network entities of the wireless communication network, like a base station or another UE. Responsive to a trigger for a transmission, the UE is to obtain resources for the transmission. The UE is to receive from one or more further UEs one or more reports or assistance information messages, AIMs, the report or AIM including resource allocation related assistance information. Dependent on a type of resource allocation related assistance information contained in the received report or AIM and/or dependent on a certain criterium, the UE is to decide how to use the received report or AIM for obtaining resources for the transmission.

Abstract: In a communication system, a transmitter is configured to change a transmission characteristic used for the communication with a receiver, wherein a receiver is configured to determine a reception quality of a communication link between the transmitter and the receiver and to transmit a feedback information to the transmitter indicating whether a reception quality has changed or in which direction the reception quality has changed, or whether a transmission characteristic should be maintained, wherein the transmitter is configured to further change the transmission characteristic used for the communication with the receiver in dependence on the feedback information received from the receiver.

Abstract: A user device, UE, for a wireless communication system is described. The wireless communication system including a plurality of user devices, UEs. Responsive to a trigger for a transmission, the UE obtains a candidate resource set for the transmission by selecting resources for the transmission within a selection window following the trigger. The UE selects the resources by taking into consideration sensing results obtained by the UE during a sensing window preceding the trigger, and the sensing results indicate whether certain resources are available or unavailable for the transmission. The UE receives from one or more further UEs one or more reports or assistance information messages, AIMS, including resource allocation related assistance information, and considers a received report or AIM for selecting resources for the transmission when one or more predefined conditions are met.

Abstract: A user device, UE, for a wireless communication network is described that communicates with one or more network entities of the wireless communication network, like a base station or another UE. The UE receives from a network entity a transmission, the transmission including a control region, like a Physical Sidelink Control Channel, PSCCH, and a data region, like a Physical Sidelink Shared Channel, PSSCH. The transmission includes a first control message, like a 1st-stage SCI, in the control region, and a second control message, like a 2nd-stage SCI, in the data region. The second control message includes control data and occupies some or all of the resources allocated in the data region of the transmission, or is associated with control data included in at least a part of the data region of the transmission.

Abstract: An apparatus for a wireless communication system is configured to be connected to at least one user device, UE, of the wireless communication system via a sidelink for a sidelink communication with the at least one UE. For a unicast transmission to the UE, the apparatus is configured to transmit a sidelink frame having a certain frame duration, a first part of the sidelink frame including a control signaling, the control signaling indicating to the UE whether a feedback is to be returned to the apparatus, the feedback indicating a successful reception of data at the UE and/or a sidelink channel condition. In case the feedback from the UE is desired, the apparatus is configured to transmit in the first part of the frame, using the control signaling, the indication that the feedback is to be provided by the UE such that a duration of the control signaling is shorter, by a remaining duration, than the frame duration, and receive from the UE, during the remaining duration, the feedback.

Abstract: A user equipment, UE, for a wireless communication network including one or more base stations, performs a transmission to a base station using a grant-free, GF, transmission scheme. The transmission being performed in accordance with a GF transmission configuration. The UE receives from the base station a certain signaling. The certain signaling indicates that the base station failed to identify the UE from the transmission. Responsive to the certain signaling from the base station, the UE retransmits the transmission in accordance with a GF retransmission configuration. The GF retransmission configuration is different from the GF transmission configuration.