Abstract: This disclosure presents solutions for a IoT/eMTC over NTN communication system of a non-terrestrial network (NTN) node and a user equipment (UE) to determine whether and how scheduling information can be sent in the resources for a HARQ feedback, when the HARQ feedback is disabled. In some example embodiments, the UE can signal a buffer size. e.g., buffer status, by encoding the HARQ feedback and scheduling request (SR) utilizing two bits to provide the fast scheduling information. The NTN node can specify to the UE a set of HARQ parameters to provide an indication of HARQ feedback status, which can be disabling or enabling of HARQ feedback, and to provide an indication of the resources for transmission of HARQ feedback when the indication of HARQ feedback status is disabling.

Abstract: Embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media of enhanced blind retransmission scheme. The method comprises: receiving, at a first device and from a second device, a configuration for determining a target offset associated with a contention resolution timer for a random access procedure; determining the target offset based on the configuration; transmitting, to the second device, a message associated with the random access procedure, the message comprising an identity of the first device for random access; and controlling a starting and termination of the contention resolution timer based on the target offset and the transmission of the message. In this way, the blind retransmission of MSG3 can be supported in the random access procedure through controlling a starting and termination of the contention resolution timer based on the transmission of the message and an offset, which is beneficial to the NTN.

Abstract: Embodiments of the present disclosure relate to methods, devices, apparatuses, and computer readable medium for enhancements on HARQ feedback. The method comprises: receiving, at a first device and from a second device, first control information for scheduling a second transmission of the second device and feedback information associated with the second transmission, and second control information for scheduling a third transmission of the first device; decoding, based on the second control information, the second transmission from the second device; generating, based on the decoding result, a first transmission comprising the feedback information and the third transmission comprising at least a duplication of the feedback information; transmitting, to the second device and based on the first control information, the first transmission; and transmitting, to the second device and based on the second control information, the third transmission.

Abstract: The present disclosure relates to a solution on data transmission in feedback disabled hybrid automatic repeat request (HARQ). According to some example embodiments of the present disclosure, a terminal device determines whether data scheduled by DCI is an initial transmission or a retransmission based on a new data indicator (NDI) and a redundancy version in the DCI. In this way, the terminal device is able to determine if the incoming DCI schedules new data or retransmission after missing the previous DCI with a toggled NDI. Further it can avoid subsequent packet error arising from a DCI detection failure when HARQ feedback is disabled.

Abstract: Devices, methods, apparatuses and computer readable storage media of service cluster update are disclosed. The method comprises selecting, by a distributed network node and from a set of candidate transmission and reception points, TRPs, one or more target TRPs associated with an update of a service cluster of a terminal device at least based on timing advances of the terminal device respect to the set of candidate TRPs; and transmitting information related to the update of a service cluster.

Abstract: Systems, methods, apparatuses, and computer program products for dynamically enabling and disabling hybrid automatic repeat request feedback even for the same hybrid automatic repeat request process without changing downlink control information are provided. For example, a method can include determining a subframe index of a start of a transport block. The method can also include deciding provision of hybrid automatic repeat request feedback based on the determined subframe index.

Abstract: Example embodiments of the present disclosure relate to repetition solution for transmission. In such solution, a first device determines information associated with a movement direction of a second device serving the first device relative to the first device. Then, the first device performs a transmission of the information to the second device.

Abstract: Disclosed are devices, methods, apparatuses, and computer readable media for feedback transmission. An example terminal device may include at least one processor and at least one memory. The at least one memory may store instructions that, when executed by the at least one processor, may cause the terminal device at least to perform: receiving from a network device, a downlink medium access control control element on a hybrid automatic repeat request process configured or indicated with hybrid automatic repeat request feedback disabled; and transmitting to the network device, a feedback for the downlink medium access control control element.

Abstract: Systems, methods, apparatuses, and computer program products for enabling efficient cell-free MIMO transmissions. One method may include receiving a downlink reference signal, determining at least one cell-free multiple input multiple output transmission strategy associated with at least one access point based upon at least the downlink reference signal, and transmitting to a network entity at least one of the at least one cell-free multiple input multiple output transmission strategy and enabling information.

Abstract: Disclosed are devices, methods, apparatuses, and computer readable media for terahertz channel communication. An example communication apparatus for transmission property sensitive band group, characterized in employing aware information of a terminal device, which may comprise channel state information, information on available band and positioning information of the terminal device may include at least one processor and at least one memory.

Abstract: According to embodiments of the present disclosure, service-based retransmission scheme for uplink in NTN has been proposed, which can support multiple retransmission schemes based on service type for uplink. The network device determines different retransmission schemes based on the QoS requirements of the services. The terminal device selects the retransmission scheme for the service. In this way, the QoS of different service and reliability of MAC CE can be guaranteed.

Abstract: Disclosed are devices, methods, apparatuses, and computer readable media for medium access control-control element transmission. An example terminal device may include at least one processor and at least one memory. The at least one memory may include computer program code, and the at least one memory and the computer program code may be configured to, with the at least one processor, cause the terminal device to perform: obtaining, a transmission number configured by a network device for sending an uplink medium access control-control element; and sending, to the network device, the uplink medium access control-control element in a hybrid automatic repeat request process if a number of transmission is less than the configured transmission number, in response to a trigger event for the uplink medium access control-control element.

Abstract: According to embodiments of the present disclosure, service-based retransmission scheme for uplink in NTN has been proposed, which can support multiple retransmission schemes based on service type for uplink. The network device determines different retransmission schemes based on the QoS requirements of the services. The terminal device selects the retransmission scheme for the service. In this way, the QoS of different service and reliability of MAC CE can be guaranteed.

Abstract: Embodiments of the present disclosure relate to dynamic active time trigger in CFRA. A first device receives a random access request from a second device in a discontinuous reception mode. The first device transmits a random access response to the second device. The random access response comprises at least one of: an indicator of an offset between a reception of the random access response and a start of monitoring scheduling information from the first device, or a flag indicating whether the indicator is present in the random access response. The first device transmits the scheduling information to the second device based on the offset.

Abstract: Example embodiments of the present disclosure relate to a terminal device, a network device, methods, apparatuses and a computer readable storage medium for updating information for uplink synchronization. The terminal device determines a first threshold duration for first information for uplink synchronization and a second threshold duration for second information for the uplink synchronization; and performs a first procedure for updating the first information and a second procedure for updating the second information based on: determining that a validity duration of one piece of information expires and a remaining validity duration of the other piece of information is shorter than corresponding threshold duration. As such, the two procedures updating the first information and the second information may be aligned with each other, thus the complexity can be reduced, the power consumption can be reduced, and the communication efficiency may be improved.

Abstract: Methods and apparatus are disclosed for subnetwork operations. A method comprises, obtaining at an apparatus, a radio network identity which identifies the apparatus as a wireless communication device within a radio network: obtaining a physical layer subnet-work identity, PSI, at least based on the obtained radio network identity: and generating one or more subnetwork signals based on the obtained PSI, wherein the one or more subnetwork signals are used for intra-subnetwork communication within a subnetwork of the radio network.

Abstract: Embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media of enhanced blind retransmission scheme. The method comprises: receiving, at a first device and from a second device, a configuration for determining a target offset associated with a contention resolution timer for a random access procedure; determining the target offset based on the configuration; transmitting, to the second device, a message associated with the random access procedure, the message comprising an identity of the first device for random access; and controlling a starting and termination of the contention resolution timer based on the target offset and the transmission of the message. In this way, the blind retransmission of MSG3 can be supported in the random access procedure through controlling a starting and termination of the contention resolution timer based on the transmission of the message and an offset, which is beneficial to the NTN.

Abstract: Example embodiments of the present disclosure relate to a solution for configuring a retransmission in communications. In an aspect, a first device transmits, to a second device, a first indication of a plurality of candidate retransmission configurations. Each of the plurality of candidate retransmission configurations includes a transmission feedback configuration and/or a data retransmission configuration. The first device selects a target retransmission configuration from the plurality of candidate retransmission configurations. The first device transmits, to the second device, a second indication of the target retransmission configuration. The first device communicates with the second device using the target retransmission configuration. The example embodiments of the present disclosure provide a dynamical multi-level indication for a retransmission scheme.

Abstract: Embodiments of the present disclosure relate to methods, devices, apparatuses, and computer readable medium for enhancements on HARQ feedback. The method comprises: receiving, at a first device and from a second device, first control information for scheduling a second transmission of the second device and feedback information associated with the second transmission, and second control information for scheduling a third transmission of the first device; decoding, based on the second control information, the second transmission from the second device; generating, based on the decoding result, a first transmission comprising the feedback information and the third transmission comprising at least a duplication of the feedback information; transmitting, to the second device and based on the first control information, the first transmission; and transmitting, to the second device and based on the second control information, the third transmission.

Abstract: Embodiments of the present disclosure relate to generation and detection of physical random access channel (PRACH) preamble. A first device determines a base sequence, a first scrambling sequence for the base sequence, and a second scrambling sequence for the base sequence. The first device generates a random access preamble by applying the first and second scrambling sequences to different portions of the base sequence, respectively. The first device transmits the random access preamble to a second device.