Port indication method for uplink data channel

Abstract

The present disclosure generally relates to a port indication method for uplink data channel transmissions in wireless communications. In some implementations, a communication node, such as a mobile station, in a wireless communication network may receive a command to trigger transmission of an uplink data channel. The node may determine one or more ports based on port parameters associated with the uplink data channel. Additionally, the node may transmit an uplink data channel using one or more ports.

Description

[0001] Divisional Application Instructions

[0002] This case is a divisional application of the invention patent application with international application number PCT / CN2020 / 073454, international application date January 21, 2020, date of entry into the Chinese national phase July 12, 2022, Chinese national application number 202080092899.8, and invention name “Port indication method for uplink data channel”. Technical Field

[0003] The present disclosure relates generally to port indication for uplink data channel transmissions in wireless communications. Background Art

[0004] As wide or ultra-wide spectrum resources are consumed, the considerable propagation losses caused by extremely high frequencies become a significant challenge. To address this issue, antenna arrays using massive multiple-input multiple-output (MIMO) and beamforming training techniques have been adopted, such as up to 1024 antenna elements for one node, to achieve beam alignment and obtain sufficiently high antenna gain. In order to keep the implementation cost low while still benefiting from the antenna array, analog phase shifters become very attractive for implementing mmWave beamforming, which means that the number of controllable phases is limited and a constant modulus constraint is imposed on these antenna elements. Given a pre-specified beam pattern, typically in the case of a single total radiated power (TRP) and a single panel, a beamforming training objective based on a variable phase shift is implemented to identify the best pattern for subsequent data transmission. Summary of the invention

[0005] The present disclosure relates to methods, systems, and devices for port indication for uplink data channel transmission.

[0006] In some implementations, a method for wireless communication is disclosed. The method may include: receiving, by a first communication node, a command from a second communication node to trigger transmission of an uplink data channel; determining, by the first communication node, one or more ports based on a port parameter associated with the uplink data channel; and transmitting, by the first communication node, the uplink data channel using the one or more ports.

[0007] In some other implementations, a method for wireless communication is disclosed. The method may include: sending, by a second communication node, a command to trigger transmission of an uplink data channel to a first communication node; and receiving, by the second communication node, the uplink data channel, wherein one or more ports of the uplink data channel are determined according to a port parameter associated with the uplink data channel.

[0008] In some other implementations, a network device is disclosed. The network device may include one or more processors and one or more memories, wherein the one or more processors are configured to read computer codes from the one or more memories to implement any of the above methods.

[0009] In some other implementations, a computer program product is disclosed. The computer program product may include a non-transitory computer-readable program medium having computer code stored thereon, which, when executed by one or more processors, causes the one or more processors to implement any of the above methods.

[0010] The above and other aspects and implementations thereof are described in more detail in the drawings, the description and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 An example of a wireless communication system is shown.

[0012] Figure 2A Shown for Figure 1 An example of a general transmission framework for a mobile station.

[0013] Figure 2B Shown for Figure 1 An example of a unified transmission framework for a mobile station.

[0014] Figure 3 is a flow chart of an example of a wireless communication method.

[0015] Figure 4 is a schematic diagram illustrating selection of a communication parameter set.

[0016] Figure 5 is a schematic diagram of forming subsets of communication parameter sets and associating sounding reference signal (SRS) resources with the communication parameter sets in the subsets.

[0017] Figure 6 is a timing diagram of multiple uplink data channel transmissions, each uplink data channel transmission being associated with a non-precoded demodulation reference signal (DMRS) port.

[0018] Figure 7 is a timing diagram of multiple uplink data channel transmissions, each uplink data channel transmission being associated with a non-precoded DMRS port or a precoded DMRS port. DETAILED DESCRIPTION

[0019] The present disclosure describes port indication for transmission of uplink data channels. For some examples or methods, port indication can be used with a unified beam indication framework for mobile communications between one or more mobile stations and a wireless access node, which can allow or enable the mobile terminal to have a common set of communication parameters that the mobile terminal uses to communicate with the base station for control and data uplink transmission and downlink reception.

[0020] Figure 1 A schematic diagram of an example wireless communication system 100 is shown, which includes a plurality of communication nodes configured to wirelessly communicate with each other. The communication nodes include a mobile station 102 and a radio access node 104. Figure 1 The example wireless communication system 100 in FIG. 1 is shown to include only one mobile station 102. However, various other numbers of mobile stations (including two or more mobile stations) may be possible for other configurations of the wireless communication system 100. In addition, the number of mobile stations 102 communicating with the wireless access node 104 may vary over time.

[0021] The mobile station 102 may include or otherwise be referred to as a mobile terminal or user equipment (UE), and may be or include, but is not limited to, a mobile phone, a smart phone, a tablet computer, a laptop computer, or other mobile device capable of wireless communication over a network. The mobile station 102 may include a transceiver circuit 106 coupled to an antenna 108 to enable wireless communication with the wireless access node 104. The transceiver circuit 106 may also be coupled to a processor 110, which may also be coupled to a memory 112 or other storage device. The memory 112 may store therein instructions or codes that, when read and executed by the processor 110, cause the processor 110 to implement the various methods described herein.

[0022] Similarly, the wireless access node 104 may include a base station or other wireless network access point capable of wirelessly communicating with one or more mobile stations over a network. For example, in various embodiments, the wireless access node 104 may include a 4G LTE base station, a 5G NR base station, a 5G central unit base station, a 5G distributed unit base station, a next generation node B (gNB), an enhanced node B (eNB), or other base stations. The wireless access node 104 may include a transceiver circuit 114 coupled to an antenna 116, which may include an antenna tower 118 in various ways to enable wireless communication with the mobile station 102. The transceiver circuit 114 may also be coupled to one or more processors 120, which may also be coupled to a memory 122 or other storage device. The memory 122 may store instructions or codes therein, which, when read and executed by the processor 120, cause the processor 120 to implement the various methods described herein.

[0023] The mobile station 102 and the wireless access node 104 may be configured to communicate wirelessly with each other in or through a mobile network and / or a wireless access network according to one or more standards and / or specifications. In general, the standards and / or specifications may define rules or procedures by which the mobile station 102 and the wireless access node 104 may communicate wirelessly, which may include those rules or procedures for communicating in millimeter (mm) bands and / or having multi-antenna schemes and beamforming capabilities. Additionally or alternatively, the standards and / or specifications are standards and / or specifications that define radio access technologies and / or cellular technologies, such as fourth generation (4G) long term evolution (LTE), fifth generation (5G) new radio (NR), or unlicensed new radio (NR-U) as non-limiting examples.

[0024] In the wireless system 100, the mobile station 102 and the wireless access node 104 are configured to wirelessly transmit signals between each other. In general, the communication between two communication nodes in the wireless system 100 can be or include transmission or reception, and usually both are performed simultaneously, depending on the perspective of the specific nodes in the communication. For example, for a communication between a first node and a second node, where the first node is transmitting a signal to the second node and the second node is receiving a signal from the first node, the communication can be considered as a transmission by the first node and a reception by the second node.

[0025] Additionally, the signals communicated between the communication nodes in the system 100 can be characterized or defined as data signals or control signals. In general, a data signal is a signal including or carrying data, such as multimedia data (e.g., voice and / or image data), and a control signal is a signal carrying control information that configures the communication nodes in a certain way so as to communicate with each other, or otherwise controls how the communication nodes transmit data signals to each other. In addition, a specific signal can be characterized or defined as an uplink (UL) signal or a downlink (DL) signal. An uplink signal is a signal transmitted from a mobile station 102 to a wireless access node 104. A downlink signal is a signal sent from a wireless access node 104 to a mobile station 102. In addition, certain signals can be defined or characterized by a combination of data / control and uplink / downlink, including an uplink control signal, an uplink data signal, a downlink control signal, and a downlink data signal.

[0026] For at least some specifications, such as 5G NR, the uplink control signal includes a physical uplink control channel (PUCCH), the uplink data signal includes a physical uplink shared channel (PUSCH), the downlink control signal includes a physical downlink control channel (PDCCH), and the downlink data signal includes a physical downlink control channel (PDCCH).

[0027] In addition, some signals transmitted in the system 100 may be defined or characterized as reference signals (RS). In general, a reference signal may be identified in the system 100 as a signal different from a data signal or a control signal, although a reference signal may be an uplink reference signal or a downlink reference signal. Non-limiting examples of reference signals used herein and defined at least in 5G NR include a demodulation reference signal (DM-RS), a channel state information reference signal (CSI-RS), and a sounding reference signal (SRS). DM-RS is used for channel estimation to allow coherent demodulation. For example, a DMRS for PUSCH transmission allows the wireless access node 104 to coherently demodulate the PUSCH. CSI-RS is a downlink reference signal used by the mobile station 102 to obtain downlink channel state information (CSI). SRS is an uplink reference signal transmitted by the mobile station 102 and used by the wireless access node 104 for uplink channel state estimation.

[0028] Additionally, a signal may have associated resources that generally provide or identify time and / or frequency characteristics for transmission of the signal. An example time characteristic is the time positioning of a smaller time unit that a signal spans or occupies within a larger time unit. In certain transmission schemes, such as orthogonal frequency division multiplexing (OFDM), the time unit may be a subsymbol (e.g., an OFDM subsymbol), a symbol (e.g., an OFDM symbol), a time slot, a subframe, a frame, or a transmission opportunity. An example frequency characteristic is the frequency band or subcarrier that carries the signal. Accordingly, as an example, for a signal spanning N symbols, the resources of the signal may identify the positioning of the N symbols within a larger time unit (such as a time slot) and the subcarrier that carries the signal.

[0029] Additionally, for at least some example configurations, the RS resource has a first type or a second type. The first type of RS resource may be referred to as a reference RS resource. The reference RS resource is an RS resource used together with a second type of RS resource, which is referred to as a target RS resource or a target channel resource, and is used to provide a spatial relationship (or spatial relationship information) for a target RS or a target channel. The target RS or target channel is a signal to be transmitted or transmitted between two communication nodes. In addition, the spatial relationship between the target RS or channel and the reference RS identifies a spatial feature that is identical or quasi-co-located at the same location between the target RS or channel and the reference RS. Example spatial features include beams, spatial parameters, or spatial filters (also referred to as spatial domain filters). The spatial feature may be on the mobile terminal side (e.g., UE side) or on the base station side (e.g., gNB side). In various embodiments, the reference RS may be a downlink (DL) signal, such as a synchronization signal (SS) block or a CSI-RS, or an uplink (UL) signal, such as an SRS.

[0030] In the present specification, when implemented according to the unified beam indication framework, the mobile station 102 includes, stores, can access, is configured with and / or is configured to generate one or more communication parameter sets. In general, a communication parameter set (CPS) is a collection of one or more parameters used by a mobile station to transmit signals, including transmission signals and reception signals. In at least some embodiments, some or all of the parameters are defined by 5G NR and / or used according to 5G NR. Additionally or alternatively, the CPS includes one or more quasi-co-location (QCL) states. For at least some example configurations, the CPS is also associated with (such as by including, linking, identifying and / or indicating) and at least one of the following: one or more power control parameters, one of a plurality of port parameters, or one or more reference signal (RS) resources.

[0031] Additionally, in various embodiments, the CPS includes, is associated with, and / or comprises one or more transmission configuration indicator (TCI) states, spatial relations (also referred to as spatial relation information), one or more reference signals (RS), one or more spatial filters, and / or one or more sets of precoding information. Furthermore, for at least some embodiments, the TCI state is the same as or equivalent to a TCI code point or QCL state. Furthermore, for at least some embodiments, the CPS is the same as or equivalent to a TCI state.

[0032] Additionally, as used herein, a QCL state is a set of one or more RS resources and a corresponding set of one or more QCL type parameters. Additionally, the QCL type parameters include Doppler spread, Doppler shift, delay spread, average delay, average gain, or spatial parameters. In addition, the QCL type D parameters are the same or equivalent to the spatial parameters or spatial receiver (Rx) parameters.

[0033] In addition, the power control parameter includes at least one of the following: a target power (also referred to as P0), a path loss RS, a scaling factor of the path loss (also referred to as α), or a closed loop process. For at least some example configurations, the path loss is a coupling loss. Additionally, the mobile station 102 may use different or multiple power control parameters for different or multiple types of signal transmissions. For example, the mobile station 102 may use an uplink data power control parameter for uplink data transmission (e.g., a PUSCH power control parameter for PUSCH transmission), an uplink control power control parameter for uplink control transmission (e.g., a PUCCH power control parameter for PUCCH transmission), and / or an uplink RS power control parameter for uplink RS transmission (e.g., an SRS power control parameter for SRS transmission). As used herein, unless otherwise specified, the term "power control parameter" may include power control parameters for one transmission type or multiple transmission types.

[0034] In addition, the port parameters include at least one of the following: the number of one or more ports, a mapping between one or more ports and one or more reference signal (RS) ports; a set of candidate transmit precoder matrix indicators (TPMIs), multiple transmission layers of a channel, or one or more sounding reference signal (SRS) resources used for a channel.

[0035] Figure 2A FIG. 1 is a schematic diagram showing a general transmission framework of a mobile station 102, which indicates the parameters that the mobile station is to determine to transmit an uplink signal or receive a downlink signal. Figure 2A As shown, when the mobile station 102 is to transmit the target uplink data signal (e.g., PUSCH), the mobile station 102 will determine the port indication and power control parameters for the target uplink data signal, and the port indication indicates one or more uplink data ports for transmitting the target uplink data signal. The mobile station 102 can determine the port indication based on RS resources (e.g., SRS resources or reference RS resources) and / or port parameters. In addition, when the mobile station 102 is to transmit an uplink reference signal (e.g., SRS) or an uplink control signal (e.g., PUCCH), the mobile station 102 can determine the power control parameters. In addition, when the mobile station 102 is to receive a downlink control, data or reference signal (e.g., PDCCH, PDSCH or CSI-RS), the mobile station 102 can determine the QCL state. After determining the relevant parameters (RS resources, port parameters, QCL state and / or power control parameters), the mobile station 102 can then transmit or receive the target uplink or downlink control / data / reference signal according to the determined parameters.

[0036] Figure 2B1 shows a schematic diagram of a unified transmission framework for a mobile station 102. The unified transmission framework is implemented by configuring the mobile station 102 with one or more communication parameter sets. The one or more communication parameter sets provide a common parameter set or parameter group for the mobile station 102, which is used to perform both uplink transmissions and downlink transmissions. Accordingly, as Figure 2B As shown, the communication parameter set including the QCL state is also associated with at least one of the first RS resource, the port parameter, or the power control parameter, and the QCL state includes the second RS resource and one or more corresponding QCL parameters. When the association is performed, according to the communication parameter set, the mobile station can transmit or receive one or more uplink data or control signals and / or one or more downlink data or control signals (for example, any one or all of PUSCH, PDCCH, PDSCH, CSI-RS, SRS, PUCCH).

[0037] Such a unified transmission framework may be desirable for situations where the mobile station 102 does not need to be configured separately for uplink and downlink communications. For such situations, configuring the mobile station 102 with a unified transmission framework, rather than doing so separately for UL and DL communications, can reduce the overhead and signaling required to configure the mobile station 102 for UL and DL communications. Additionally, the unified framework utilizes spatial relationship information that supports beam indication for uplink control channel and reference signal transmissions (e.g., PUCCH and SRS), as well as beam indication for uplink data channels (e.g., PUSCH), which can be achieved through a mapping between one or more SRS resources indicated by the wireless access station 104 and antenna ports for the uplink data channel. As a result, the beam configuration for the uplink data channel can be derived from the spatial relationship information and mapping information between RS resources and RS antenna ports.

[0038] This specification describes various port indications for uplink data channel transmission. Mobile station 102 can use at least some of the various methods in conjunction with a unified transmission framework, and / or mobile station 102 can use a unified transmission framework including an associated communication parameter set to determine the port parameters for uplink data channel transmission (e.g., PUSCH transmission). In order to have a unified transmission framework, a downlink reference signal can be configured or indicated as a reference signal for the spatial relationship of an uplink data channel. Therefore, the SRS resource indicator (SRI) field in the DCI command for scheduling uplink data channel transmission should be removed. However, if the SRI field is removed, mobile station 102 cannot determine the port parameters for uplink data channel transmission from the SRI field. Accordingly, the following method enables the mobile station to determine the port parameters for uplink data channel transmission without the SRI field from the DCI command.

[0039] Figure 3 A flow chart of an example method 300 for wireless communication is shown. At block 302, the mobile station 102 may receive a command triggering transmission of an uplink data channel. For at least some example methods, the uplink data channel is or includes a PUSCH.

[0040] At block 304, the mobile station 102 determines one or more ports based on a port parameter associated with the uplink data channel. For at least some example approaches, the port parameter includes at least one of the following: a number of ports, an entry for precoding information and a number of layers, one or more RS ports, and one or more first RS resources. At block 306, the mobile station may transmit the uplink data channel using the one or more ports determined by the mobile station 102 based on the port parameter associated with the uplink data channel.

[0041] The mobile station 102 includes multiple antenna ports (also referred to as radio link chains) in practice, and the antenna ports can be observed by the mobile station 102 by transmitting a reference signal (e.g., SRS) using the antenna ports. Subsequently, using a command including a port indication, an uplink data channel transmission is scheduled by the wireless access node 104. According to the port indication, some antenna ports can be used for uplink data channel transmission. Specifically, the antenna port used by the mobile station 102 for transmitting the uplink data channel is the same as the antenna port of the reference signal indicated by the port indication.

[0042] For at least some example methods, the channel that triggers the uplink data channel transmission may include a DCI command that schedules the transmission. However, as described for block 304, rather than using information in the DCI command, such as information in an SRI field of the DCI command, to determine the port(s) to use for the transmission, the mobile station 102 derives the port from a port parameter associated with the uplink data channel.

[0043] For some example methods, mobile station 102 may receive an RRC signal or a MAC-CE signal and determine the port parameters from (such as directly from) the RRC or MAC-CE signal.

[0044] For other example methods, the mobile station 102 associates the port parameters with a communication parameter set that includes at least RS source and QCL type parameters. For such example methods, the trigger command indicates the communication parameter set, and the mobile station 102 identifies the port parameters associated with the communication parameter set in response to the command. The mobile station can then determine that one or more ports for uplink data transmission are the same as or at least include one or more ports of the port parameters associated with the communication parameter set.

[0045] Additionally or alternatively, for at least some example methods, the port parameter includes one or more SRS ports in the one or more SRS resources. For at least some of these example methods, the mobile station 102 may receive an RRC signal or a MAC-CE signal that includes one or more SRS resources and / or configure one or more SRS resources in the mobile station 102 (such as in a memory 112 of the mobile station 102). The mobile station 102 may determine that the one or more ports for uplink data transmission are the same as, or at least include, the one or more SRS ports in the one or more SRS resources.

[0046] Additionally, for at least some of the example methods, in which the mobile station 102 determines that one or more ports for uplink data transmission are the same as one or more SRS ports in one or more SRS resources, or at least include the one or more SRS ports, as described above, the mobile station 102 may associate the one or more SRS resources with a communication parameter set, such as a communication parameter set including a second RS resource and a QCL type parameter. For at least some of these methods, the command triggering the uplink data transmission indicates the communication parameter set, such as by including, for example, an ID of the communication parameter set. In response to the command, the mobile station 102 identifies the communication parameter set indicated by the command, and in turn identifies one or more SRS ports in one or more SRS resources associated with the communication parameter set. Furthermore, the mobile station 102 determines that one or more ports for uplink data channel transmission are the same as one or more SRS ports in one or more SRS resources associated with the communication parameter set. For at least some of these methods, the command includes a communication parameter set field.

[0047] In addition, for at least some of these methods, in which the mobile station uses one or more SRS resources to determine (multiple) ports for uplink data transmission, the mobile station 102 can determine the spatial relationship of SRS resources in the one or more SRS resources based on the communication parameter set and / or the second RS resource in the communication parameter set. For at least some of these methods, the mobile station 102 can also determine the spatial relationship based on a hybrid automatic repeat request-acknowledgement (HARQ-ACK) corresponding to a physical downlink shared channel (PDSCH) carrying a MAC-CE signal; the timing or instance of SRS transmission; or a downlink control information (DCI) command that triggers the SRS transmission timing, wherein the SRS transmission timing is non-periodic. In a specific method, in which the mobile station 102 determines the spatial relationship based on the transmission timing, the SRS transmission timing is no earlier than the first time slot (i.e., in the time slot The first time slot after or after the first time slot in which the HARQ-ACK corresponding to the PDSCH carrying the MAC-CE signal is transmitted in time slot n, and is the number of orthogonal frequency division multiplexing (OFDM) symbols of subcarriers per subframe for the subcarrier spacing configuration μ.

[0048] For at least some approaches, the mobile station 102 may determine a plurality of communication parameter sets. The mobile station 102 may then select a communication parameter set from the plurality of communication parameter sets. In certain approaches, the command triggering the uplink data channel transmission identifies which communication parameter to select. After making the selection, the mobile station 102 identifies one or more ports for the uplink data channel transmission.

[0049] For at least some of these methods, in which the mobile station 102 selects a communication parameter set from a plurality of communication parameter sets, the mobile station 102 may first determine one or more subsets of the communication parameter sets from the plurality of communication parameter sets. The mobile station 102 may then select a communication parameter set from the subset to determine one or more port parameters. Figure 4 A schematic diagram illustrating an example three-stage selection process is shown. In a first stage, the mobile station 102 determines a plurality of communication parameter sets (such as a group or pool 400) of communication parameter sets. In a second stage, the mobile station 102 determines a subset 402 of the plurality of communication parameter sets. In a third stage, the mobile station 102 selects a communication parameter set from the subset. Any of a variety of commands / signals may be received or otherwise used by the mobile station 102 to determine the plurality of communication parameter sets, subset(s), and to make the selection, including one or more RRC commands, MAC-CE commands, and / or DCI commands.

[0050] Figure 5is a schematic diagram illustrating another manner in which a mobile station 102 may determine a subset of communication parameter sets and select a communication parameter set. In a first stage, the mobile station 102 may determine a plurality of communication parameter sets (such as a group or pool) 500 of communication parameter sets and respectively determine a plurality of SRS resources (such as a group or pool) of SRS resources (SRSR). For at least some methods, the pools / groups 500, 502 may be determined in response to receiving one or more commands (such as, for example, one or more RRC commands). Then, in a second stage, the mobile station 102 may form a subset of communication parameter sets, wherein each communication parameter set in the subset is from the group / pool 500. In addition, to form the subset, the mobile station 102 associates each communication parameter set in the subset with an SRS resource from the group / pool 502. The mobile station 102 may form the association between the subset and the communication parameter set and the SRS resource in response to one or more commands, such as one or more MAC-CE commands. Then, in a third stage, the mobile station 102 may select a communication parameter set and associated SRS resources from the subset, such as in response to a command triggering an uplink data channel transmission.

[0051] In other example methods, the mobile station 102 may determine the port parameters to include multiple first demodulation reference signal (DMRS) ports. For at least some of these methods, the first DMRS port is precoded by an identification matrix, or is not generated according to a precoding matrix of an uplink data channel. The first DMRS port is the same as or equivalent to a non-precoded DMRS port. Additionally or alternatively, for at least some of the example methods, the mobile station 102 determines one or more ports for uplink data channel transmission to be the same as multiple first DMRS ports. For at least some of these methods, the one or more ports correspond to one or more uplink data channel transmission layers multiplied by a precoding matrix. Additionally or alternatively, the mobile station 102 determines one or more ports from multiple first DMRS ports based on a port indication field from a command that triggers uplink data transmission.

[0052] Additionally, for some example methods, the uplink data channel transmission is a codebook-based transmission, while for other example methods, the uplink data channel transmission is a non-codebook-based transmission. In the case where the transmission is based on a codebook, the mobile station 102 determines the precoding information and the number of transmission layers according to the command that triggers the uplink data channel transmission. In the case where the transmission is based on a non-codebook, the mobile station 102 maps one or more ports for uplink data channel transmission to one or more DMRS ports in a plurality of first DMRS ports. For at least some methods, the mobile station 102 may perform mapping by associating one or more ports for uplink data channel transmission with one or more DMRS ports in sequence based on a port index of one or more ports and one or more DMRS ports. In a specific configuration, the index of the DMRS port can be mathematically represented by a first vector z, the number of transmission layers for uplink data channel transmission can be mathematically represented by a second vector y, and the index of the DMRS port (first vector z) is equal to the number of transmission layers (second vector y) multiplied by the precoding matrix W, or z=Wy. If the DMRS port is non-precoded and the transport layer is precoded (from the gNB’s perspective), then the channel response of the non-precoded DMRS port is known from the channel estimation, and the channel response of each transport layer is equal to the DMRS port multiplied by the inverse of the precoding matrix W. In this sense, the inverse of the precoding matrix W is the combined or hybrid matrix from the DMRS port to the uplink data channel transport layer.

[0053] Additionally or alternatively, for at least some example methods, the mobile station 102 determines the spatial relationship of the plurality of first DMRS ports according to a communication parameter set including at least the second RS resource and at least the QCL type parameter. For at least some of these methods, the communication parameter set is associated with an uplink data channel.

[0054] Additionally or alternatively, transmission of uplink data channels corresponding to the plurality of first DMRS ports is periodic, semi-persistent or aperiodic.

[0055] Additionally or alternatively, for at least some example methods, the plurality of first DMRS ports includes one or more DMRS port groups, and the mobile station 102 determines a plurality of communication parameter sets, each communication parameter set being associated with a respective DMRS port group.

[0056] Additionally or alternatively, for at least some example methods, in which the mobile station 102 transmits uplink data based on DMRS ports, the mobile station 102 may determine the plurality of first DMRS ports based on at least one of the following: a maximum number of SRS ports, a maximum number of DMRS ports, or a maximum number of transmission layers supported by uplink data channel transmission. For at least some of these methods, the mobile station determines the plurality of first DMRS ports through an RRC command or a MAC-CE command.

[0057] Additionally or alternatively, for at least some example methods, the mobile station 102 may transmit multiple uplink data channels, such as two uplink data channels. For at least some example methods, the multiple uplink data channel transmissions are adjacent transmissions. For at least some of these methods, the mobile station 102 may receive a command, such as a DCI command, to trigger the transmission of each of these uplink data channels. The mobile station 102 may determine one or more second ports for transmitting a second uplink data channel based on a plurality of first DMRS ports, and transmit the second uplink data channel using the one or more second ports. For at least some of these methods, the time difference between the first data channel transmission and the second data channel transmission is less than or equal to X time units, where X is an integer. In a specific method, X is determined based on the capability signaling of the mobile station or configured by an RRC or MAC-CE command.

[0058] For at least some example methods, the mobile station 102 may determine one or more second ports for a second uplink data channel transmission or other subsequent uplink data channel transmission based on whether the multiple first DMRS ports used for the second uplink data channel transmission or other subsequent uplink data channel transmission are precoded or non-precoded. Figure 6 A timing diagram of multiple (eg, three) adjacent uplink data channels (eg, PUSCH) transmissions is shown, where each of the uplink data channels is scheduled for transmission on a non-precoded port. Figure 7 A timing diagram of multiple (e.g., three) adjacent uplink data channel (e.g., PUSCH) transmissions is shown, wherein an initial uplink data channel is transmitted using one or more non-precoded DMRS ports, and one or more subsequent uplink data channels are transmitted using precoded DMRS ports. For both cases, each uplink data transmission is triggered and / or scheduled by an associated command (such as a DCI command). In addition, each uplink data transmission includes DMRS information or parameters, or is otherwise associated with a corresponding DMRS transmission using one or more of the plurality of first DMRS ports.

[0059] Special References Figure 6, wherein the second uplink data transmission and the subsequent uplink data transmission are scheduled on non-precoded DMRS ports, and one or more ports (e.g., one or more second ports, one or more third ports, etc.) used for the second uplink data transmission and / or the subsequent uplink data transmission are the same as one or more ports of the plurality of first DMRS ports used for the first uplink data channel transmission. Figure 6 In the example embodiment, a first uplink data channel is submitted to be transmitted using non-precoded DMRS ports {0, 1, 2, 3}, and those same non-precoded DMRS ports {0, 1, 2, 3} are also used for a second uplink data channel transmission and a third uplink data channel transmission scheduled on the non-precoded DMRS ports. For at least some example methods, the number of non-precoded DMRS ports is configured by one or more received RRC commands. The mobile station 102 may then use one or more non-precoded DMRS ports indicated by a first command (e.g., a first DCI command) for scheduling the first uplink data channel transmission. Thereafter, for transmissions using the non-precoded DMRS ports indicated by a subsequent command (e.g., a DCI command such as Figure 6 For adjacent uplink data channel transmissions of non-precoded DMRS ports scheduled by DCI #2 and DCI #3 in the first scheduling command, the mobile station 102 may use the same non-precoded DMRS ports indicated by the first scheduling command for subsequent uplink data channel transmissions. However, Figure 6 It is also shown that, because the precoding and / or transmission layer parameters are determined based on the precoding information and the layer number field, for at least some methods, the non-zero power ports may be different in multiple uplink data channel transmissions.

[0060] Special References Figure 7 , wherein a second uplink data transmission and / or a subsequent uplink data transmission is scheduled using a precoded DMRS port, and the one or more second ports used for the second uplink data transmission or the subsequent uplink data channel transmission may include but not necessarily completely match one or more first DMRS ports of the multiple first DMRS ports used for the first uplink data channel transmission. For example, the one or more ports used for the second uplink data channel transmission and / or the subsequent uplink data channel transmission may be determined based on the precoding applied to the multiple first DMRS ports. In addition, for at least some example methods, the mobile station 102 may use multiple first DMRS ports because those were used for the most recent transmission using non-precoded DMRS ports. For illustration, in Figure 7In the embodiment, a first uplink data channel is scheduled for transmission using non-precoded DMRS ports {0, 1, 2, 3}, a second uplink data channel is scheduled for transmission using precoded DMRS ports {0, 3}, and a third uplink data channel is scheduled for transmission using precoded DMRS ports {2, 3}.

[0061] Additionally, in various embodiments, the mobile station 102 may dynamically schedule non-precoded DMRS ports and precoded DMRS ports. Additionally or alternatively, in various embodiments, when a first uplink data channel (PUSCH#1) is scheduled for transmission by a first command (DCI#1) (which may be codebook-based), and at the same time the mobile station 102 has scheduled one or more non-precoded DMRS ports (e.g., ports {0, 1, 2, 3}), the mobile station 102 may determine the precoding parameters and / or transmission layer based on the precoding information and layer number field in the first command. The mobile station 102 may then use those same one or more non-precoded DMRS ports as one or more ports for the first uplink data channel transmission. The second uplink data channel transmission and the third uplink data channel transmission may then be determined by the second command and the third command (e.g., Figure 7 As explained, the mobile station 102 may determine the precoded DMRS ports based on the non-DMRS ports used in the most recent transmission.

[0062] Additionally or alternatively, for at least some example methods, the mobile station 102 may perform power scaling in conjunction with transmitting an uplink data channel. For an uplink data channel (e.g., PUSCH) transmission, when the mobile station 102 calculates the transmission power according to the uplink power control parameter, the mobile station 102 may scale the transmission power by the scaling factor. The mobile station 102 may then evenly distribute the scaled power across the antenna ports on which the mobile station 102 transmits the uplink data channel with non-zero power. In other words, the mobile station 102 determines the transmission power by the scaling factor.

[0063] Additionally, for at least some example methods, the mobile station 102 may be configured to perform power scaling in conjunction with an RRC parameter called UL_FullPower_Tx (or ULFPTx), which is a parameter that enables or disables the mobile station 102 according to or as defined in one or more radio access technology specifications (e.g., such as 5G NR) for a full power transmission scheme. The mobile station 102 may also operate in accordance with or as defined by one or more radio access technology specifications such as 5G NR in different modes (including a first mode and a second mode) in a full power transmission scheme. When the mobile station 102 operates with an enabled full power transmission scheme, the mobile station 102 may be considered to be configured with a full power transmission scheme, and / or configured with ULFPTx. Additionally, when the mobile station 102 operates with a disabled full power transmission scheme, the mobile station 102 may be considered not to be configured with a full power transmission scheme, and / or not to be configured with ULFPTx. Furthermore, when configured with ULFPTx, the mobile station 102 may be configured to enable a first mode (full mode 1) or to enable a second mode (full mode 2).

[0064] In accordance with these full power transmission scheme features, for at least some example methods where uplink data channel transmission is codebook based, in response to not configuring ULFPTx or configuring ULFPTx and enabling full mode 1, the mobile station 102 determines a scaling factor for the transmission power of the uplink data channel based on at least one of: a maximum number of ports for uplink data channels supported by the mobile station (UE) 102 for transmitting the uplink data channel; a maximum number of first DMRS ports supported by the mobile station 102; or a maximum number of SRS ports supported by the UE.

[0065] Additionally or alternatively, for at least some example methods, where uplink data channel transmission is codebook based, in response to ULFPTx being configured and full mode 2 being enabled, the mobile station 102 determines a scaling factor for transmission power of the uplink data channel based on at least one of: the number of ports used for uplink data channel transmission; the number of first DMRS ports; or the number of SRS ports in one or more SRS resources associated with the indicated communication parameter set.

[0066] In addition, for at least some example methods, in which ULFPTx is configured and full mode 2 is enabled, the mobile station 102 determines the scaling factor based on one or more of the following: (a) based on the number of ports configured in the port parameters for uplink data channel transmission, in particular based on the ratio of the number of ports with non-zero power for transmitting uplink data channels to the number of ports for uplink data channels; (b) based on the number of DMRS ports, in particular based on the ratio of the number of ports with non-zero power for transmitting uplink data channels to the first number of DMRS ports; or (c) based on the number of SRS ports in (multiple) SRS resources associated with the indicated communication parameter set, in particular based on the ratio of the number of ports with non-zero power for transmitting uplink data channels to the number of SRS ports in one or more SRS resources associated with the communication parameter set.

[0067] Additionally or alternatively, for at least some example methods, where ULFPTx is not configured or ULFPTx is configured and full Mode 2 is enabled, the mobile station 102 may fix the scaling factor for uplink data transmissions at 1 at the corresponding TPMI.

[0068] Additionally or alternatively, for non-codebook based transmissions of uplink data signals, the mobile station 102 may determine that the scaling factor is one, and / or the mobile station may skip power scaling.

[0069] The above description and accompanying drawings provide specific example embodiments and implementations. However, the described subject matter can be embodied in a variety of different forms, and therefore, the subject matter covered or claimed is intended to be interpreted as not being limited to any example embodiment set forth herein. It is intended to provide a reasonable scope for the claimed or covered subject matter. Among other things, for example, the subject matter can be embodied as a method, device, component, system, or non-transient computer-readable medium for storing computer code. Thus, for example, the embodiment can take the form of hardware, software, firmware, storage media, or any combination thereof. For example, the above method embodiment can be implemented by a component, device, or system (including a memory and a processor) by executing a computer code stored in a memory.

[0070] Throughout the specification and claims, terms may indicate or be implied in contexts other than their explicitly designated meanings. Likewise, the phrase "in one embodiment / implementation" as used herein does not necessarily refer to the same embodiment, and the phrase "in another embodiment / implementation" as used herein does not necessarily refer to a different embodiment. For example, the claimed subject matter is intended to include combinations of example embodiments in whole or in part.

[0071] In general, the usage of a term at least in part in the context can be understood. For example, the terms used herein, such as "and", "or" or "and / or", can include various meanings, which depend at least in part on the context in which such terms are used. Generally, "or", if used to associate a list such as A, B or C, is intended to represent A, B and C, which are used here in an inclusive sense, and A, B or C, which are used here in a non-inclusive sense. In addition, the term "one or more" used herein depends at least in part on the context, and can be used to describe any feature, structure or characteristic in a single sense, or can be used to describe features, structures or characteristics in a plural sense. Similarly, terms such as "one", "an" or "the" can be understood to convey a single usage or to convey multiple usages, depending at least in part on the context. In addition, the term "based on" can be understood to not necessarily be intended to convey a set of non-inclusive factors, but can allow the presence of other factors without having to be explicitly described again, depending at least in part on the context.

[0072] References to features, advantages, or similar language in this specification do not imply that all features and advantages that can be achieved using the present solution should or are included in any single implementation thereof. Rather, language indicating features and advantages is understood to mean that a particular feature, advantage, or characteristic associated with an embodiment is included in at least one embodiment of the present solution. Thus, throughout this specification, discussions of features and advantages and similar language may (but do not necessarily) refer to the same embodiment.

[0073] Furthermore, the described features, advantages, and characteristics of the present solution may be combined in any suitable manner in one or more embodiments. In view of the description herein, one skilled in the art will recognize that the present solution may be practiced without one or more specific features or advantages of a particular embodiment. In other cases, additional features and advantages may be identified in certain embodiments that may not be present in all embodiments of the present solution.

Claims

1. A method for wireless communication, comprising: Receiving, by the first communication node, a medium access control element MAC-CE signal from the second communication node, the MAC-CE signal indicating a communication parameter set, the communication parameter set including a reference signal RS resource and a quasi co-location QCL type parameter; Associating, by the first communication node, one or more sounding reference signal (SRS) resources with the communication parameter set; The first communication node receives downlink control information DCI for scheduling a physical uplink shared channel PUSCH from the second communication node; Determining, by the first communication node, one or more ports according to a port parameter associated with the PUSCH, wherein the port parameter comprises one or more SRS ports in one or more SRS resources; as well as The PUSCH is transmitted by the first communication node using the one or more ports.

2. The method according to claim 1, further comprising: A spatial relationship of SRS resources in the one or more SRS resources is determined based on the RS resources in the communication parameter set, wherein the RS resources are associated with QCL Type-D parameters.

3. The method of claim 2, wherein determining the spatial relationship comprises determining the spatial relationship further based on at least one of the following: A hybrid automatic repeat request-acknowledgement HARQ-ACK corresponding to a physical downlink shared channel PDSCH, the PDSCH carrying the MAC-CE signal; or The timing or time instance of the SRS transmission.

4. The method according to claim 3, wherein the SRS transmission occurs no earlier than the first time slot or after the first time slot, i.e., in the time slot After the first time slot after the MAC-CE signal, the HARQ-ACK corresponding to the PDSCH carrying the MAC-CE signal is transmitted in time slot n, and is the number of orthogonal frequency division multiplexing OFDM symbols per subframe for subcarrier spacing configuration μ.

5. A method for wireless communication, comprising: Transmitting, by the second communication node, a medium access control element MAC-CE signal, the MAC-CE signal indicating a communication parameter set, the communication parameter set comprising a reference signal RS resource and a quasi co-location QCL type parameter, and wherein one or more sounding reference signal SRS resources are associated with the communication parameter set; The second communication node transmits, to the first communication node, downlink control information DCI for scheduling transmission of the PUSCH using one or more ports determined according to a port parameter associated with a physical uplink shared channel PUSCH, wherein the port parameter includes one or more SRS ports in the one or more SRS resources; as well as The PUSCH is received by the second communications node on the one or more ports.

6. The method of claim 5, wherein a spatial relationship of SRS resources in the one or more SRS resources is determined based on the RS resources in the communication parameter set, wherein the RS resources are associated with QCL Type-D parameters.

7. The method of claim 6, wherein the spatial relationship is further determined based on at least one of: A hybrid automatic repeat request-acknowledgement HARQ-ACK corresponding to a physical downlink shared channel PDSCH, the PDSCH carrying the MAC-CE signal; or The timing or time instance of the SRS transmission.

8. The method according to claim 7, wherein the SRS transmission occurs no earlier than the first time slot or after the first time slot, i.e., in the time slot After the first time slot after the MAC-CE signal, the HARQ-ACK corresponding to the PDSCH carrying the MAC-CE signal is transmitted in time slot n, and is the number of orthogonal frequency division multiplexing, OFDM, symbols per subframe for subcarrier spacing configuration μ.

9. A wireless communication device, comprising: A memory storing a plurality of instructions; as well as A processor configured to execute the plurality of instructions, and when executing the plurality of instructions, the processor is configured to: Receive a medium access control element MAC-CE signal, the MAC-CE The signal indicates a communication parameter set, wherein the communication parameter set includes a reference signal RS resource and a quasi co-location QCL type parameter; Associating one or more sounding reference signal (SRS) resources with the communication parameter set; Receiving downlink control information DCI for scheduling a physical uplink shared channel PUSCH; determining one or more ports according to a port parameter associated with the PUSCH, wherein the port parameter comprises one or more SRS ports in the one or more SRS resources; as well as The PUSCH is transmitted using the one or more ports.

10. The wireless communication device of claim 9, wherein the processor, when executing the plurality of instructions, is further configured to: A spatial relationship of SRS resources in the one or more SRS resources is determined based on the RS resources in the communication parameter set, wherein the RS resources are associated with QCL Type-D parameters.

11. The wireless communication device of claim 10, wherein the processor, when executing the plurality of instructions, is configured to further determine the spatial relationship according to at least one of the following: A hybrid automatic repeat request-acknowledgement HARQ-ACK corresponding to a physical downlink shared channel PDSCH, the PDSCH carrying the MAC-CE signal; or The timing or time instance of the SRS transmission.

12. The wireless communication device according to claim 11, wherein the SRS transmission occurs no earlier than the first time slot or after the first time slot, that is, in the time slot After the first time slot after the MAC-CE signal, the HARQ-ACK corresponding to the PDSCH carrying the MAC-CE signal is transmitted in time slot n, and is the number of orthogonal frequency division multiplexing OFDM symbols per subframe for subcarrier spacing configuration μ.

13. A wireless communication device, comprising: A memory storing a plurality of instructions; as well as A processor configured to execute the plurality of instructions, and when executing the plurality of instructions, the processor is configured to: Transmitting a medium access control element MAC-CE signal, the MAC-CE signal indicating a communication parameter set, the communication parameter set comprising a reference signal RS resource and a quasi co-location QCL type parameter, and wherein one or more sounding reference signal SRS resources are associated with the communication parameter set; Transmitting downlink control information DCI for scheduling transmission of a physical uplink shared channel (PUSCH) using one or more ports determined according to a port parameter associated with the PUSCH, wherein the port parameter includes one or more SRS ports in the one or more SRS resources; as well as The PUSCH is received on the one or more ports.

14. The wireless communication apparatus of claim 13, wherein a spatial relationship of SRS resources in the one or more SRS resources is determined based on the RS resources in the communication parameter set, wherein the RS resources are associated with QCL Type-D parameters.

15. The wireless communication device of claim 14, wherein the spatial relationship is further determined based on at least one of the following: A hybrid automatic repeat request-acknowledgement HARQ-ACK corresponding to a physical downlink shared channel PDSCH, the PDSCH carrying the MAC-CE signal; or The timing or time instance of the SRS transmission.

16. The wireless communication device of claim 15, wherein the SRS transmission occurs no earlier than the first time slot or after the first time slot, that is, in the time slot After the first time slot after the MAC-CE signal, the HARQ-ACK corresponding to the PDSCH carrying the MAC-CE signal is transmitted in time slot n, and is the number of orthogonal frequency division multiplexing OFDM symbols per subframe for subcarrier spacing configuration μ.

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