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.

Abstract: Embodiments of the present disclosure relate to devices, methods, apparatuses, and computer readable storage media of enhanced UL synchronization for improved system performance. The method comprises obtaining a configuration of a gap within which a radio resource control connected state of the first device is kept; receiving, within the gap, system broadcasted information used for deriving a compensation associated with a transmission between the first device and a second device; and performing a uplink synchronization between the first device to the second device within the gap. In this way, a process of the GNSS fix position refreshing and/or satellite ephemeris data reception and UL/DL re-synchronization can be achieved by the UE in RRC connected mode and therefore the resources and power consumption can be reduced.

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: Example embodiments of the present disclosure relate to methods, devices apparatuses and computer readable storage media of an access procedure for Cell-free Multi-input Multi-output (MIMO). In example embodiments, a terminal device transmits an access request to a first set of uplink access network devices. The access request contains a list of identifications of candidate downlink access network devices. Then, the terminal device receives an access response from a first set of downlink access network devices.

Abstract: This disclosure presents solutions for a communication system of a non-terrestrial network (NTN) node and a user equipment (UE) to determine, where the NTN node can determine one or more HARQ retransmission schemes for one or more LCHs used by the UE. The HARQ retransmission scheme can be mapped into one, two, or five bits of the DCI signal, depending on the mapping algorithm selected. In some example embodiments. LCHs can be grouped by using similar LCH prioritization or similar HARQ retransmission schemes. HARQ retransmission schemes can be mapped to the LCG. If there remains sufficient data space in the TBS/UL, other LCH can be included into the transmission even though the other LCH utilize different HARQ retransmission schemes. The UE can encode its HARQ transmission using the HARQ retransmission scheme indicated for the LCH the UE is utilizing.

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: 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: Embodiments of the present disclosure provide a communication method and device for uplink power control. The method comprises receiving a plurality of sets of power control parameters from a network device, each of the plurality of sets being associated with a corresponding one of a plurality of sets of candidate beam patterns for the terminal device. The method further comprises selecting, based on a beam pattern for the terminal device, one of the plurality of sets of power control parameters for uplink transmit power control, the beam pattern for the terminal device being included in the set of candidate beam pattern that is associated with the selected set of power control parameters.

Abstract: Disclosed are methods for selecting a random access procedure type. An example method may include receiving configuration information including a threshold associated with a transmission quality factor via a non-terrestrial network downlink, obtaining a value of the transmission quality factor, and selecting a 2-step random access procedure or a 4-step random access procedure based on the threshold and the obtained value of the transmission quality factor. Related apparatuses and computer readable media are also disclosed.

Abstract: Various communication systems may benefit from improved HARQ. For example, it may be helpful to improve HARQ in non-terrestrial networks. A method may include receiving at a user equipment a configuration from a network entity. The configuration may include a hybrid automatic repeat request virtual process number. The method may also include receiving at the user equipment a downlink control information from the network entity. The downlink control information may include a hybrid automatic repeat request virtual process identification. In addition, the method may include receiving at the user equipment another downlink control information. The another downlink control information may include the hybrid automatic repeat request virtual process identification.

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.

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: 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: 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: A separation apparatus is disclosed, comprising: a layerizer arranged to bring a group of particles in a layer on a transport surface with a constant spatial relation of the particles relative to each other in the layer; an identifier arranged to identify particles in the group of particles that have a specific property; a separator arranged to separate the particles in the group based on a difference in affinity between the particles and the separator; an affinity modifier arranged to modify said affinity for identified particles relative to non-identified particles in the group. The layerizer comprises a recirculating transport surface on which the particles of the layer are carried. The transport surface is arranged to move along a transport trajectory as a rigid plane. Further, a method for separation of particles from a group of particles is disclosed.

Abstract: Various communication systems may benefit from improved HARQ. For example, it may be helpful to improve HARQ in non-terrestrial networks. A method may include receiving at a user equipment a configuration from a network entity. The configuration may include a hybrid automatic repeat request virtual process number. The method may also include receiving at the user equipment a downlink control information from the network entity. The downlink control information may include a hybrid automatic repeat request virtual process identification. In addition, the method may include receiving at the user equipment another downlink control information. The another downlink control information may include the hybrid automatic repeat request virtual process identification.