Abstract: Embodiments of the present disclosure relate to methods and devices for reference signal (RS) transmission. In example embodiments, a method implemented in a network device is provided. According to the method, a first set of RS resources are determined for RS transmission by the network device. The first set of RS resources are associated with a first number of RS ports to be used for RS transmission and correspond to a first set of resource elements (REs) interpolated with unused REs in frequency domain. A first RS configuration for RS transmission is generated based on the first set of RS resources. Information on the first RS configuration is transmitted to a terminal device served by the network device.

Abstract: Embodiments of the present disclosure relate to methods, devices and computer storage media for communication. A method comprises transmitting, from a network device, Sounding Reference Signal (SRS) hopping parameters and a partial sounding parameter to a terminal device, wherein the SRS hopping parameters indicate a bandwidth configuration for SRS communication and the partial sounding parameter indicates whether partial sounding across frequency is enabled or not; and receiving SRS sequences from the terminal device based on the SRS hopping parameters and the partial sounding parameter. Embodiments of the present disclosure can achieve flexible partial sounding across frequency.

Abstract: Embodiments of the present disclosure relate to methods, devices and computer readable media for communication of a RS. A method of communication comprises receiving, at a terminal device and from a network device, first information triggering a first communication of a reference signal in a first uplink resource, the first communication being triggered later than a second communication of the reference signal in a second uplink resource; determining, based on a modification result, power adjustment information for the first communication, the modification result indicating whether the second uplink resource is modified; and performing the first communication based on the power adjustment information. Embodiments of the present disclosure can ensure a correct power control for RS communication, and can achieve a dynamic adjustment for a RS communication while considering both flexibility of RS triggering and its related overhead.

Abstract: Embodiments of the present disclosure provide method, device and computer readable medium for beam failure recovery. In example embodiments, a method implemented at a terminal device is provided. The method comprises determining a configuration for receiving Physical Downlink Control Channels (PDCCHs) from a network device, the network device communicating with the terminal device via first and second Transmission and Reception Points (TRPs), wherein the configuration indicates which one of the first and second TRPs are the PDCCHs to be received from. The method further comprises determining whether a beam failure occurs in at least one of the first and second TRPs. In addition, the method further comprises, in response to determining that a beam failure occurs in at least one of the first and second TRPs, performing beam failure recovery (BFR) for the first and second TRPs at least based on the configuration.

Abstract: Embodiments of the present disclosure relate to devices, methods and computer readable storage media of HARQ feedback for multiple data channels scheduled by a single DCI. The method comprises receiving, at a terminal device, control information from a network device; in accordance with a determination that transmissions of a plurality of transport blocks from the network device to the terminal device on a set of data channels are scheduled by the control information, determining a control channel for transmitting Hybrid Automatic Repeat Request, HARQ, feedback information associated with the plurality of transport blocks; and transmitting the HARQ feedback information via the control channel to the network device. In this way, the enhancement on HARQ-ACK feedback mechanism for terminal device in a case when multiple TBs/independent PDSCHs are scheduled by a single DCI can be reached, which may alleviate possible PUCCH collisions and provide more flexibility.

Abstract: Embodiments of the present disclosure relate to methods, devices and computer readable mediums for sounding reference signal (SRS) transmission. In example embodiments, a method implemented at a terminal device is provided. According to the method, in response to at least one set of SRS resources being configured for transmitting a SRS to a network device and antenna switching being enabled for the terminal device, the terminal device determines at least one guard period required for transmitting the SRS. Uplink transmission to the network device is expected to be scheduled outside the at least one guard period. In response to the uplink transmission being scheduled outside the at least one guard period, the terminal device transmits the SRS to the network device over the at least one set of SRS resources. In response to the uplink transmission being scheduled within the at least one guard period, the terminal device disables at least a part of the at least one set of SRS resources for transmitting the SRS.

Abstract: Embodiments of the present disclosure relate to a method and apparatus of transmitting a reference signal and a method and apparatus of receiving a reference signal. In one embodiment of the present disclosure, the method of transmitting a reference comprises receiving a reference signal configuration indication, wherein reference signal resources are divided into at least two reference signal groups, and the reference signal configuration indication indicates a reference signal configuration including a reference signal group configuration; and transmitting the reference signal using a reference signal sequence in a reference signal group as indicated by the reference signal group configuration, wherein the reference signal sequence can be multiplexed with another layer or another user in different reference signal groups.

Abstract: Embodiments of the present disclosure relate to methods and apparatuses for Demodulation Reference Signal (DMRS) configuration. In example embodiments, a method implemented in a network device is provided. According to the method, a first configuration for DMRS transmission between the network device and a terminal device is determined. The first configuration includes first information related to the DMRS transmission and is associated with a second configuration related to transmission scheduling. Both the first information and the second configuration are indicated to the terminal device by transmitting second information on the first configuration to the terminal device.

Abstract: Embodiments of the present disclosure relate to methods, devices and computer readable media for communication of a RS. A method of communication comprises determining, at a network device, first information about a first resource for communication of a reference signal and second information about a modification of the first resource; and transmitting the first and second information to a terminal device for determination of a second resource for performance of the communication of the reference signal. The method further comprises receiving, at the terminal device, the first and second information; determining a second resource based on the first and second information; and performing the communication of the reference signal based on the second resource. Embodiments of the present disclosure can achieve a dynamic configuration for a RS resource, and enhance flexibility of the RS resource configuration. In addition, the related overhead can be saved.

Abstract: Embodiments of the disclosure provide a method and device for performing communication. The method comprises: determining a target transmission pattern from a set of candidate transmission patterns, wherein each of the candidate transmission patterns contains a DL transmission part and/or a UL transmission part, and the candidate transmission patterns differ from one another in terms of time durations of the respective DL transmission parts and/or the UL transmission parts; and performing communication between a network device and a terminal device by using the target transmission pattern.

Abstract: Embodiments of the present disclosure provide a solution for improving feedback information for transmissions with repetition in a communication system. In a method for communication, a terminal device can obtain a first group of candidate offsets for transmissions of a first type and a second group of candidate offsets for transmissions of a second type. The terminal device may receive, from the network device, scheduling information for scheduling a transmission in a first slot, the scheduling information comprising a target offset selected from the first group of candidate offsets, the target offset indicating a second slot associated with a feedback indication for the transmission. The terminal device may determine a set of slots based on the second slot and the first group of candidate offsets. The terminal device may transmit, to the network device in the second slot, a set of feedback indications for the set of slots.

Abstract: Embodiments of the present disclosure relate to methods and apparatuses for Reference Signal (RS) transmission. In example embodiments, a method implemented in a network device is provided. According to the method, the network device determines at least one set of CSI-RS resources for transmitting Tracking Reference Signal (TRS) to a terminal device. The network device further determines a first offset between a first slot to transmit a first signal for enabling transmission of the TRS and a second slot to transmit the TRS in the at least one set of CSI-RS resources. The first offset is different from a second offset between a third slot to transmit a second signal for enabling transmission of CSI-RS and a fourth slot to transmit the CSI-RS. The network device transmits a configuration indicating the at least one set of CSI-RS resources and the first offset to the terminal device.

Abstract: Embodiments of the present disclosure relate to methods, devices and computer storage media for communication. A method comprises transmitting, from a network device to a terminal device, a plurality of PDCCH repetitions for scheduling downlink transmissions, wherein at least a part of the plurality of PDCCH repetitions indicate a same counter downlink assignment indicator (DAI) value; performing, based on the plurality of PDCCH repetitions, the downlink transmissions from the network device to the terminal device; and receiving a feedback sequence for the downlink transmissions from the terminal device, wherein the at least a part of the plurality of PDCCH repetitions correspond to a same feedback field in the feedback sequence. Embodiments of the present disclosure propose a way to indicate DAI values for PDCCH repetitions. The dynamic HARQ-ACK codebook can be obtained based on the DAI values without additional signaling overhead.

Abstract: Embodiments of the present disclosure provide a solution for transmitting and receiving control information in a communication system. In a method for communication, a terminal device can determine that first control information is to be transmitted to a network device in a second slot after a first slot, the first control information being at least a part of previous control information transmitted in the first slot. The terminal device may determine a set of resources for second control information to be transmitted to the network device in the second slot. The terminal device may transmit, to the network device, at least one of the first control information and the second control information based on the set of resources. Embodiments of the present disclosure can improve the reliability and robustness of transmissions of control information in the communication system.

Abstract: Embodiments of the present disclosure relate to methods, devices and computer storage media for communication. A method comprises determining, at a terminal device, a resource configuration for control information on a channel between the terminal device and a network device, the resource configuration being associated with a plurality of Transmission Configuration Indicator (TCI) states for the channel; and detecting a plurality of repetitions of the control information on the channel from the network device based on the resource configuration, a TCI state of the plurality of TCI states corresponding to at least one of the plurality of repetitions. Embodiments of the present disclosure can improve reliability and robustness for Physical Downlink Control Channel (PDCCH).

Abstract: Embodiments of the present disclosure relate to methods and devices for reference signal (RS) transmission. In example embodiments, a method implemented in a network device is provided. According to the method, a first set of RS resources are determined for RS transmission by the network device. The first set of RS resources are associated with a first number of RS ports to be used for RS transmission and correspond to a first set of resource elements (REs) interpolated with unused REs in frequency domain. A first RS configuration for RS transmission is generated based on the first set of RS resources. Information on the first RS configuration is transmitted to a terminal device served by the network device.

Abstract: Embodiments of the present disclosure relate to a method, network device, and apparatus for transmitting a preemption indication and a method, terminal device, and apparatus for receiving a preemption indication. In an embodiment of the present disclosure, the method of transmitting a preemption indication may comprise transmitting a preemption indication to a terminal device, wherein the preemption indication indicates information on a portion of resources allocated to a first transmission which is preempted by a second transmission, and wherein the preemption indication is associated with information on structure of the current slot. In embodiments of the present disclosure, by means of information on structure of a subframe, the indication monitoring and overhead for the preemption indication can be reduced remarkably, thereby providing a much more efficient preemption indication solution.

Abstract: Embodiments of the present disclosure relate to methods, devices and computer readable media for communication. A method comprises: receiving, at a first device, control information from a second device for scheduling a plurality of transmission occasions of a physical shared channel; determining, a plurality of transmission control indication (TCI) states to be used for the plurality of transmission occasions; in response to the plurality of transmission occasions of the physical shared channel being configured to be scheduled by the control information, determining, from the plurality of transmission occasions of the physical shared channel, a set of transmission occasions of the physical shared channel associated with one TCI state of the plurality of TCI states; receiving, at least based on the TCI state, the plurality of transmission occasions from the second device over the physical shared channel.

Abstract: Embodiments of the present disclosure relate to methods and apparatuses for transmitting control information. In example embodiments, a method implemented in a network device is provided. According to the method, a configuration for PDCCH transmission is determined at least based on a periodicity of a plurality of symbol-based control resource sets (CORESETs) within one slot. The configuration indicates an allocation of a first number of PDCCH candidates to the plurality of symbol-based CORESETs. The first number of PDCCH candidates is less than a second number of PDCCH candidates preconfigured for a slot-based CORESET. The configuration is transmitted to a terminal device served by the network device. Downlink control information (DCI) is transmitted based on the configuration to the terminal device in the plurality of symbol-based CORESETs.

Abstract: Embodiments of the disclosure provide a method and device for performing communication. The method comprises: determining a target transmission pattern from a set of candidate transmission patterns, wherein each of the candidate transmission patterns contains a DL transmission part and/or a UL transmission part, and the candidate transmission patterns differ from one another in terms of subcarrier spaces of the respective DL transmission parts and/or the UL transmission parts; and performing communication between a network device and a terminal device by using the target transmission pattern.