Abstract: Disclosed are methods, apparatuses, and systems for sidelink carrier aggregation. The methods include: transmitting one or more packets on one or more carriers of a plurality of carriers that are to be used for a sidelink carrier aggregation; determining at least one of: reception of an acknowledgment (ACK) from each of one or more target receiver user equipment (UEs), or non-reception of a negative acknowledgement (NACK) on at least one of the one or more carriers of the plurality of carriers; and canceling one or more remaining transmissions or re-transmissions for the one or more packets scheduled on the one or more carriers of the plurality of carriers, in response to a determination of at least one of: reception of the ACK from at least one of the one or more target receiver UEs, or non-reception of the NACK on the at least one of the one or more carriers of the plurality of carriers.

Abstract: In one embodiment, the user equipment performs generating a coordination request for information on resources for use for direct inter user equipment transmissions, the coordination request including an indication of a preference for resources for receiving a coordination response; monitoring for coordination requests made by at least one other user equipment; generating the resource preference indication in dependence upon at least one preference indication from at least one of the monitored coordination requests.

Abstract: An apparatus and computer program are disclosed. The apparatus has at least one processor and at least one memory including computer program code. The at least one memory and computer program code being configured to, with the at least one processor, cause the apparatus to receive a plurality of coordination requests from a plurality of user equipment. The coordination requests include a request for information on resources for use for direct inter-user equipment transmissions and include an indication of a preference of resources for receiving a coordination response.

Abstract: Disclosed is a method comprising transmitting, to one or more user devices, a message comprising a first reference signal and a first set of masks; receiving, from the one or more user devices, at least one of the following: first masked channel information per mask of the first set of masks, or a preferred sidelink positioning reference signal configuration based on the first masked channel information; and determining a first sidelink positioning reference signal configuration based at least partly on the first masked channel information or the preferred sidelink positioning reference signal configuration.

Abstract: An apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: determine a first allocation comprising at least one of: a first time-domain allocation comprising at least one symbol within a slot associated with a first reference signal transmission, or a first frequency-domain allocation comprising at least one subcarrier within a physical resource block associated with the first reference signal transmission, or a first code-domain allocation comprising a sequence associated with the first reference signal transmission, or a first space-domain allocation comprising a beam associated with the first reference signal transmission; and determine a physical sidelink feedback channel transmission resource for a physical sidelink feedback channel transmission in response to the first reference signal transmission at least based on the determined first allocation.

Abstract: Apparatus and method for inter-UE coordination in groupcast transmissions are provided. Solution comprises communicating (400) with a group of apparatuses in a group communication utilising sidelink transmission, where the group of apparatuses comprises a second apparatus configured to coordinate resource allocation for the group communication and at least one other first apparatus; transmitting (402), utilising a designated hybrid automatic repeat request process, an inter-UE coordination request. Positive or negative hybrid automatic repeat request acknowledgements are received (404) from the group of apparatuses in response to transmitting the inter-UE coordination request and monitoring of inter-UE coordination requests of the at least one other first apparatus are monitored (406) based on the received acknowledgements from the at least one other first apparatus.

Abstract: Systems, methods, apparatuses, and computer program products for support for sidelink user equipment in co-channel coexistence environments are provided. For example, a method can include configuring a user equipment with a shared resource pool and a sub-resource-pool comprising resources of at least one selected subframe of the shared resource pool for sidelink transmissions according to a first radio access technology in a co-channel coexistence with sidelink transmissions according to a second radio access technology. The method can also include configuring the user equipment with a network configuration for adaptation and use of the sub-resource-pool depending on type of the user equipment.

Abstract: There is provided a method comprising transmitting from a user equipment information about sidelink synchronization of the user equipment; and transmitting from the user equipment information about reduced reception of sidelink synchronization signals at the user equipment.

Abstract: A method includes causing or detecting, by a user device that is a member of a sidelink group of user devices, a sidelink-related event that triggers an operation associated with the sidelink-related event and specific to the sidelink group; and transmitting a notification of the sidelink-related event via a sidelink group-specific resource, in order to synchronize, among user devices of the sidelink group including any user device of the sidelink group that failed to detect the sidelink-related event, the performing by the user devices of the sidelink group of the operation associated with the sidelink-related event and specific to the sidelink group.

Abstract: Disclosed are methods, apparatuses, and systems for beam management for a user equipment (UE) in a sidelink communication. The method includes: establishing, by a first UE, a beam alignment with a second UE using a first beam; receiving a second-beam assistance indication, the second-beam assistance indication indicating at least one of time information or frequency information associated with a second beam for the second UE; transmitting a second-beam configuration; receiving a confirmation of the second-beam configuration; determining whether a selection of a resource is triggered, the selection of resource being associated with use of the second beam; in response to a determination that the selection of the resource is triggered, updating a candidate resource set and selecting one or more resources from an updated candidate resource set; and transmitting one or more signals or messages using the one or more resources selected from the updated candidate resource set.

Abstract: Example embodiments of the present disclosure relate to a terminal device, a network device, methods, apparatuses and a computer readable storage medium for a mapping of sub-channels and PRBs. A terminal device may determine a number of remaining PRBs after a mapping between multiple sub-channels and a resource pool or a physical resource set, or applying a guard band; and the terminal device may further adjust the mapping based on the number of remaining PRBs. In one illustrated example, one of the multiple sub-channels may be extended by the number of remaining PRBs. In another illustrated example, a further sub-channel may be mapped with the remaining PRBs. As such, the remaining PRBs may be used for sidelink transmission and the spectrum efficiency may be improved.

Abstract: According to an example aspect of the present invention, there is provided an apparatus caused at least to determine a common automatic gain control symbol to be transmitted during a first symbol of a slot, wherein the first symbol of the slot is for a transmission of a first automatic gain control symbol by a transmitting sidelink user equipment and for a transmission of a second automatic gain control symbol by a receiving sidelink user equipment and the apparatus is the transmitting sidelink user equipment, wherein the common automatic gain control symbol comprises the first automatic gain control symbol and the second automatic gain control symbol and transmit the first automatic gain control symbol during the first symbol of the slot.

Abstract: According to an example aspect of the present invention, there is provided a user equipment comprising at least one processing core and at least one memory storing instructions that, when executed by the at least one processing core, cause the user equipment at least to measure a received signal strength of a unicast transmission received in the user equipment from another user equipment, UE, over a direct UE-to-UE radio link, obtain at least one power adjustment parameter concerning the other UE, and include in a report to a base station node, or a further user equipment, UE, either: the measured received signal strength as modified with the at least one power adjustment parameter, or both the measured received signal strength and the at least one power adjustment parameter.

Abstract: An apparatus comprising circuitry configured to: determine whether a resource pool of a group of time slots associated with a first carrier spacing overlaps with a resource pool of a frame associated with a second carrier spacing within a period of time; wherein the first carrier spacing has a higher frequency than the second carrier spacing, and the period of time comprises the group of time slots associated with the first carrier spacing and the frame associated with the second carrier spacing; and perform sensing of at least one time slot of the group of time slots, based on whether the resource pool of the group of time slots associated with the first carrier spacing overlaps with the resource pool of the frame associated with the second carrier spacing within the period of time.

Abstract: Embodiments of the present disclosure relate to a method, device, apparatus and computer readable medium for sidelink transmission. According to embodiments of the present disclosure, a first device determines a target transmission start position from a set of candidate transmission starting positions in a sidelink slot based on an access level of a sidelink transmission to be performed. The first device performs a LBT before the target transmission starting position. If the LBT is successful, the first device performs the sidelink transmission from the target transmission starting position. In this way, it enables the use on Mode 2 in shared/unlicensed spectrum, while addressing the issues of un-sensed (not detected) SPS transmissions due to LBT failure as well as making mode 2 more robust towards LBT failures due to other coexisting systems.

Abstract: Systems, methods, apparatuses, and computer program products for radio resource reservation for inter-UE coordination in NR sidelink mode 2. The method may include transmitting from a first user equipment to a second user equipment, a first coordination request to request a set of preferred or non-preferred radio resources for transmission by the first user equipment. The first coordination request may include at least a first resource indication value for indicating a first radio resource for transmission of a corresponding first coordination message by the second user equipment to the first user equipment. The method may also include receiving the corresponding first coordination message from the second user equipment transmitted on the first radio resource in response to the first coordination request.

Abstract: Disclosed are methods, apparatuses, and systems for beam alignment in a sidelink communication. The apparatuses include a first UE that is configured to: receive, from a second UE, a first radio signal using at least one first antenna; determine a first direction associated with the received first radio signal based on an estimated angle-of-arrival of the received first radio signal at the first UE; select a beam among a plurality of beams for a communication with the second UE based on the determined first direction; and transmit, to the second UE, a second radio signal on the selected beam using at least one second antenna.

Abstract: A first user equipment (UE) for sidelink beam maintenance in a sidelink communication. The first UE comprises-es a memory storing an instruction and a processor configured to execute the instruction stored in the memory to: obtain resource reservation information and future location information of the first UE, the future location information of the first UE including an estimated first location of the first UE at a first time later than a current time: transmit, to a second UE, the resource reservation information and the future location information of the first CE; receive, from the second UE, a signal including future location information of the second UE, the future location information of the second UE including an estimated second location of the second UE at the first time; and determine, based on the future location information of the second UE, one or more beams for transmission from the first CE.

Abstract: Systems, methods, apparatuses, and computer program products for determining the transmit power for a common interlace and RBs. One method may include a UE determining a PSFCH allocation for at least one dedicated RB, calculating a corresponding transmission power of the PSFCH allocation for the at least one dedicated RB, and determining an allocation of common PSFCH RBs. The method further include, based upon the transmission power for the dedicated resource blocks and the determined number of common resource block, calculating transmission power for the common RBs.

Abstract: Systems, methods, apparatuses, and computer program products for detecting consistent listen before talk failure cases and suitably recovering from such failure cases in the implementation of sidelink for unlicensed bands are provided. For example, a method can include monitoring a transmission resource pool in which the apparatus is operating. The transmission resource pool can include resource block sets, each of which can be monitored. The monitoring can be applied to resource block sets for which a prohibit timer is not running or is expired. The monitoring can be performed to detect listen before talk failures of the apparatus for each monitored resource block set of the plurality of resource block sets. The method can also include triggering or declaring a consistent listen before talk failure for the monitored resource block set when the count value of detected failures exceeds a threshold.