Abstract: Example techniques for data retransmission in systems that do not utilize explicit hybrid automatic repeat request (HARQ) feedback are presented, including an example method by a wireless device that includes starting a timer for a hybrid automatic repeat request (HARQ) process associated with a transport block (TB) transmission by the wireless device to the network node. The method includes identifying a HARQ policy for the HARQ process, the HARQ policy governing whether the wireless device is to retransmit the TB or transmit a new TB where no HARQ feedback responsive to the TB transmission is received from the network node before the timer expires. Furthermore, the method includes retransmitting the TB or transmitting the new TB according to the HARQ policy at a next periodic transmission occasion for the HARQ process after the timer expires. Methods at a network node and related apparatuses and computer programs are also presented.

Abstract: According to certain embodiments, a method for use in a wireless device for transmitting uplink control information (UCI) on grant-free resources comprises reserving a subset of time/frequency resources of a grant-free uplink channel for transmitting UCI, and upon determining the wireless device has UCI to transmit on the grant-free uplink channel, transmitting the UCI to a network node in the reserved subset of time/frequency resources.

Abstract: There is disclosed a method of operating a wireless device in a wireless communication network, the wireless device being triggered for aggregated transmission of first control information associated to a control channel, the aggregated transmission indicating a number R of retransmissions of the first control information to be performed. The method includes transmitting the first control information on a data channel based on a scaling parameter, the scaling parameter being based on the number R of retransmissions. The disclosure also pertains to related devices and methods.

Abstract: A method in a communication network. The method includes a first network node receiving a first combined signal comprising a first message transmitted by a first UE and a second message transmitted by a second UE. The method includes the first network node decoding the first message. The method includes the first network node using a backhaul link to transmit the decoded first message to a second network node that receives a second combined signal comprising the first message and a third message transmitted by a third UE.

Abstract: Modification of uplink (UL) data transmission with repetition in response to preemption indication is disclosed herein. In one embodiment, a wireless device modifies UL data transmission with repetition responsive to receiving a preemption indication. The wireless device begins a UL data transmission comprising a plurality of repetitions of a data transmission, wherein at least two (2) repetitions are associated with different Redundancy Version (RV) values. The wireless device receives a first preemption indication during a first repetition of the plurality of repetitions, wherein the first repetition is associated with a RV value of X, and X is a positive integer. The wireless device then retransmits the first repetition of the UL data transmission reusing the RV value of X. In some embodiments, after receiving the first preemption indication, the wireless device may cancel the UL data transmission if a code rate of the UL data transmission exceeds a threshold rate.

Abstract: Systems and methods of monitoring uplink (UL) cancelation indications are provided. In some embodiments, a method performed by a wireless device for monitoring UL cancelation indications includes: determining (800, 900) a time interval during which the wireless device should monitor UL cancelation indications; and monitoring (802) UL cancelation indications during the time interval. Some embodiments provide a time interval during which the wireless device needs (902) to monitor UL cancelation indication such that it avoids unnecessary monitoring. This may result in savings in wireless device power consumption.

Abstract: A method, system and apparatus for uplink transmission cancellation are disclosed. According to one aspect, a method includes receiving a cancellation indication of uplink resources to be cancelled, determining protected uplink resources to be protected from cancellation, and cancelling transmissions on uplink resources indicated to be cancelled other than uplink resources determined to be protected from cancellation.

Abstract: Embodiments of the present disclosure provide methods and apparatus for scatterer localization and material identification. The method performed by an identification apparatus may comprise: determining (S101) a reflection loss of a power of a wireless signal caused by a reflection at an object, for the purpose of identifying a material of the object and localizing a position of the object. The method performed by a reception apparatus may comprise: receiving (S201) a wireless signal transmitted from a transmission apparatus and reflected by an object; and transmitting (S202), to an identification apparatus, information about the wireless signal. The method performed by a transmission apparatus may comprise: receiving (S301) an indication for identifying a material of an object; and transmitting (S302) a wireless signal reflected by the object to a reception apparatus.

Abstract: A User Equipment (UE) (12) configured for operation in a wireless communication network (10) ignores a received preemption indicator responsive to determining that the involved data transmission by the UE (12) will carry Uplink Control Information (UCI) from the UE (12), at least when the UCI is of a certain type or priority. For example, the UE (12) ignores the preemption indicator if the UCI is of the certain type or priority, and otherwise follows the preemption indicator by skipping the uplink data transmission. Correspondingly, a radio network node (22) configured for operation in the wireless communication network (10) determines whether an uplink data transmission by a UE (12) on certain radio resources will include UCI, and the radio network node (22) transmits or does not transmit a preemption indicator preempting use by the UE (12) of the certain radio resources for the uplink data transmission, in dependence on the determination.

Abstract: A method, wireless device and network node are disclosed. According to one aspect, a wireless device includes a radio interface configured to obtain a timer value, T, for measuring time elapsed from a start of a semi-persistent scheduled, SPS, uplink, UL, data transmission. The wireless device includes processing circuitry configured to perform an SPS UL data transmission associated with a hybrid automatic repeat request, HARQ, process identification, ID, wherein the HARQ process ID is one of a plurality of HARQ process IDs. The processing circuitry is configured to perform a new data transmission or autonomous retransmission with said HARQ process ID at the next available time for said HARQ process ID after elapsed time T.

Abstract: There is provided a method for operating a network node. The method of operating a network node includes configuring a UE with a PUCCH group including a plurality of cells, and configuring the UE to dynamically change a cell on which HARQ-ACK feedback for a cell of the PUCCH group is transmitted. A network node, a method for a user equipment and a user equipment is also provided.

Abstract: A method for optimized hybrid automatic repeat request (HARQ) operation. The method comprises transmitting an uplink data transmission on the shared uplink resource to a network node, and receiving a feedback message from the network node, the feedback message comprising a feedback indication indicating a reception status of the uplink data transmission from the terminal device. An explicit HARQ feedback can be provided for uplink data transmission in a wireless communication network such as a new radio (NR) network.

Abstract: According to some embodiments, a method is performed by a network node for random access in a wireless network. The network node is suitable for serving a first type of wireless device and a second type of wireless device and transmission/reception capabilities of the first 5 type of wireless device are reduced with respect to transmission/reception capabilities of the second type of wireless device. The method comprises receiving a random access preamble from a wireless device and, based on the received random access preamble, transmitting a random access response to the wireless device according to transmission/reception capabilities common to both the first type of wireless device and the second type of wireless device.

Abstract: The present disclosure relates to a method and an apparatus for multiple access transmission. The method includes: determining (S401) a first signature allocated to a first transmission; and determining (S402) a second signature allocated to a second transmission. With hopping of the signature, the successful rate of NOMA transmission in the communication system will be improved.

Abstract: The present disclosure provides techniques for reducing latency of periodic URLLC transmission and other critical data transmission with low latency requirements. To support periodic URLLC traffic, SPS with repetition is used. Before synchronization is achieved, the base station sends to the UE an SPS configuration for a periodic uplink data transmission. When the starting time of the data transmission is not known, the base station over-provisions SPS resources for the periodic data transmission. Based on the timing of the data transmissions, the base station adjusts the timing of the SPS configuration.

Abstract: An adaptive receiver for UEs using NOMA-based schemes. One objective is to improve the achievable rate of the weak UE and improve the fairness among the grouped UEs. At the same time, an embodiment gives the chance to reduce the error probability of the strong UE. Thus, compared to conventional NOMA, an embodiment increases the network sum throughput.

Abstract: The present disclosure relates to a method for a terminal device to determine demodulation reference signal (DMRS), comprising: obtaining (211) a DMRS configuration and a corresponding signature assigned by a network side node; constructing (212) a DMRS according to the DMRS configuration; mapping (213) the DMRS to a physical channel assigned to the terminal device. The signature indicates a processing configuration for the physical channel. In the embodiments of the present disclosure, the signature, and DMRS configuration may be configured correspondingly, to obtain low-crosstalk DMRS signals for different terminal devices, thus, the number of the supported terminal devices may be improved.

Abstract: Techniques are provided to ensure that a terminal device is able to perform measurements efficiently when an on/off scheme is used by network nodes, particularly in a heterogeneous network environment. An example method, implemented in a network node, comprises obtaining a discovery signal window pattern, the discovery signal window pattern defining one or more discovery signal windows during which each of a plurality of cells is to transmit a corresponding discovery signal, and sending an indication of the discovery signal window pattern to a terminal device.

Abstract: Systems and methods related to sub-slot Physical Uplink Control Channel (PUCCH) repetitions are disclosed herein. In one embodiment, a method performed by a wireless communication device for sub-slot PUCCH repetitions comprises receiving one or more sub-slot PUCCH repetition configurations from a base station and transmitting two or more sub-slot PUCCH repetitions in accordance with one of the one or more sub-slot PUCCH repetition configurations. In this manner, sub-slot PUCCH transmissions can be made to be more reliable or have better coverage.

Abstract: According to some embodiments, a method in a network node for configuring monitoring occasions for use in a network node of a wireless communication network comprises determining a physical downlink control channel (PDCCH) search space monitoring configuration for a wireless device. The PDCCII search space monitoring configuration comprises a monitoring periodicity and a number of blind decodes for each search space of a plurality of search spaces over a plurality of slots. The method further comprises sending the monitoring configuration to the wireless device. A method in a wireless device comprises receiving the monitoring configuration and monitoring each search space according to the monitoring configuration.