Abstract: Embodiments of the present disclosure relate to methods, devices and computer storage media for communication. A terminal device receives a configuration concerning random resource selection. The terminal device transmits, to a network device, information related to a target TCI state in a first set of TCI states for transmission between the terminal device and the network device. The first set of TCI states is at least partially non-overlapping with a second set of TCI states which have been activated. The target TCI state is outside the second set of TCI states. After that, the terminal device sets at least the target TCI state in the first set of TCI states as activated. As a result, MAC CE activation will not be required. Thus, signaling overhead and latency will be reduced.

Abstract: Embodiments of the present disclosure provide methods, devices and computer readable media for multi-TRP transmission. According to a method for communication, a terminal device receives downlink control information (DCI) from at least one of a plurality of network devices in communication with the terminal device, each of the plurality of network devices having a different demodulation reference signal (DMRS) group comprising a plurality of DMRS ports for transmitting DMRSs. The terminal device determines, from the DCI, respective transmission configuration indication (TCI) states for DMRS groups of the plurality of network devices and DMRS ports for receiving DMRSs transmitted by the plurality of network devices. The terminal device receives the DMRSs from the plurality of network devices on the DMRS ports based on the TCI states. The embodiments of the present disclosure provide solution of multi-TRP communication with reduced overhead.

Abstract: Embodiments of the present disclosure relate to methods, devices and computer readable media for communication. According to embodiments of the present disclosure, a terminal device receives, from a first network device, at least one configuration of a sounding reference signal (SRS) which comprises a first configuration of a first subband and a second configuration of a partial sounding. The terminal device determines a size of a second subband based on the first and second configurations. The size is multiple of four. The terminal device also determines an index of a start resource block of the second subband. The index of the start resource block is multiple of four. The terminal device transmits the SRS based on the size of the second subband and the index to the network device. In this way, the partial SRB is supported.

Abstract: Embodiments of the present disclosure relate to methods, devices and computer readable mediums for uplink transmission. In example embodiments, a method implemented at a terminal device is provided. The method comprises, in response to being configured with at least one SRS resource set by a network device and the at least one SRS resource set being associated with first and second CSI-RS resources, receiving, from the network device, a first CSI-RS transmitted via a first TRP over the first CSI-RS resource and a second CSI-RS transmitted via a second TRP over the second CSI-RS resource. The method further comprises determining, based on the received first and second CSI-RSs, first precoding information for uplink transmission via the first TRP and second precoding information for uplink transmission via the second TRP respectively.

Abstract: Embodiments of the present disclosure relate to methods, devices and computer readable media for communication. A terminal device receives, from a network device, an indication on whether one of a first mode and a second mode of PUCCH carrier switching is enabled, the first mode being based on a dynamic configuration in DCI, the second mode being based on an RRC configuration; and in accordance with a determination that the one of the first mode and the second mode is enabled, perform the PUCCH carrier switching for a PUCCH transmission to be processed. In this way, PUCCH carrier switching may be flexibly configured.

Abstract: Embodiments of the present disclosure relate to methods, devices, and computer readable medium for communication. According to embodiments of the present disclosure, a terminal device transmits its capability related to an artificial intelligence (AI) data processing model to a network device. The network device transmits to the terminal device a first reference signal configuration which is used during an first phase of the AI data processing model. The terminal device determines an association between the first reference signal configuration and a second reference signal configuration which is used during a training phase of the AI data processing model. In this way, the AI/ML techniques are integrated with CSI framework. Further, the terminal device understands when the reduced reference signals are used and perform corresponding behaviors.

Abstract: Embodiments of the present disclosure relate to methods, devices and computer readable media of communication. A transmitting device determines whether no DM-RS is to be transmitted on a first symbol configured for DM-RS transmission and if no DM-RS is to be transmitted on the first symbol, transmits a signal to a receiving device in at least part of REs on the first symbol, the signal comprising at least one of data or a PT-RS. The receiving device demodulates the signal from the at least part of REs on the first symbol. In this way, DM-RS overhead may be reduced and the interference to co-scheduled UE may be avoided.

Abstract: Embodiments of the present disclosure relate to methods, devices and computer readable media for communication. A terminal device receives a first physical downlink control channel (PDCCH) which indicates a first Transmission Configuration Indication (TCI) state and receives a second PDCCH which indicates a second TCI state from a network device. If the reception of the second PDCCH is later than the reception of the first PDCCH, the terminal device performs a communication with the network device with the second TCI. In this way, it avoids ambiguity between two TCI states. Further, it also avoids unnecessary beam switching.

Abstract: Embodiments of the present disclosure relate to methods, devices and computer readable media for communication. According to embodiments of the present disclosure, a terminal device transmits, to a network device, a channel state information (CSI) report indicating a correspondence between reported values of a plurality of groups of resources and a plurality of channel measurement resource sets configured by the network device. Each of the plurality of groups comprises resources selected from different channel measurement resource sets. In this way, the uplink control information may be used for indicating the CSI at the level of beam pairs with a suitable payload size.

Abstract: Embodiments of the present disclosure relate to the communication processes in a wireless communication system based on short TTIs. According to one embodiment of the present disclosure, there provide a method for communication by a base station. The method comprise: receiving, from a user equipment, an uplink demodulation reference signal, DMRS, in an uplink transmission time interval, TTI, of an uplink subframe, which supports two or more uplink TTIs. At least one uplink TTI supported by the uplink subframe is configured to only transmit uplink control information and/or uplink data without any uplink DMRS. In the other aspects of the present disclosure, there also provides methods for communication by a user equipment and corresponding apparatuses.

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

Abstract: Embodiments of the present disclosure relate to methods, devices and computer readable media for communication. A method comprises determining, at a first device, a first parameter for determination of a sequence group index based on at least one of the following: a second parameter indicating an identity associated with a physical channel between the first device and a second device, a third parameter indicating a scrambling identity, and a fourth parameter indicating a cell identity; determining the sequence group index based on the first parameter; generating, at least based on the sequence group index, a Demodulation Reference Signal (DMRS) sequence to be transmitted to the second device; and transmitting the generated DMRS sequence to the second device over the physical channel. Embodiments of the present disclosure can enable DMRS transmission with low Peak to Average Power Ratio (PAPR) and high flexibility.

Abstract: Embodiments of the present disclosure relate to methods, devices and computer readable media for multi-TRP transmission. The method comprises determining at least one transmission configuration indication (TCI) state to be configured to a terminal device, the at least one TCI state indicating a plurality of reference signal (RS) sets and quasi co-location relationship between the plurality of RS sets and respective groups of DMRS ports. The method further comprises determining DMRS ports for transmitting DMRSs to the terminal device via the plurality of TRPs and associations between the plurality of RS sets and the DMRS ports. In addition, the method further comprises configuring the at least one TCI state, the DMRS ports, and the associations between the plurality of RS sets and the DMRS ports to the terminal device. In this way, multi-TRP transmission can be supported without introducing additional indication overhead.

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 set of repetitions of downlink control information (DCI) for scheduling data transmissions from the network device to the terminal device; performing, based on the set of repetitions of the DCI, the data transmissions from the network device to the terminal device; and receiving, from the terminal device, a single feedback signal for the data transmissions. Embodiments of the present disclosure can improve reliability and robustness for Physical Downlink Control Channel (PDCCH).

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 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 devices for reference signal (RS) transmission. In example embodiments, a method implemented in a network device is provided. According to the method, one or more RS patterns are determined for a plurality of RS ports. A RS pattern indicates a configuration of a RS to be transmitted to a terminal device via one or more RS ports. Afterwards, information of the RS patterns is transmitted to the terminal device.

Abstract: Embodiments of the present disclosure relate to a method, device and computer readable storage medium of communication. The method comprises receiving at a terminal device a DCI for scheduling at least one PUSCH transmission from a network device. The DCI comprises a first field indicating that the at least one PUSCH transmission is to be transmitted based on a SRS resource set from a plurality of SRS resource sets or the plurality of SRS resource sets, and a second field indicating an index of the single SRS resource set for transmitting the at least one PUSCH transmission. The method further comprises transmitting, by the terminal device, the at least one PUSCH transmission based on the DCI to the network device. In this way, when supporting dynamic switching between single-TRP transmission and multi-TRP transmission, the newly-introduced overhead may be minimized.

Abstract: Embodiments of the present disclosure provide method, device and computer readable medium for multi-TRP transmission. In example embodiments, a method implemented at a terminal device is provided. The method comprises, in response to a first bandwidth part (BWP) being configured for first and second Transmission and Reception Points (TRPs) in communication with the terminal device and different Physical Downlink Control Channels (PDCCHs) being configured for the first and second TRPs, receiving, from the first TRP, a first PDCCH in a first slot. The method further comprises, in response to the first PDCCH indicating BWP switching from the first BWP to a second BWP on the first TRP, ensuring BWPs on the first and second TRPs to be aligned. In this way, BWPs for multiple TRPs can be aligned in multi-PDCCH based multi-TRP transmission.

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.