Power Scaling and Virtualization for Multi-Resource Transmission

Abstract

A method, system and apparatus are disclosed, in which a wireless device is configured to receive a first indication of a first precoder for use with a first antenna port signal set carrying a first portion of a physical channel and associated with a first SRS resource of the plurality of SRS resources, receive a second indication of a second precoder for use with a second antenna port signal set carrying a second portion of the physical channel and associated with a second SRS resource of the plurality of SRS resources, and adjust the first and second physical channel portions forming first and second signal powers according to the first and second indications, where each antenna port signal in the first antenna port signal set is adjusted by a number of antenna ports, which is the NZP of the first antenna port signal set.

Description

[Technical field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to wireless communications, and more particularly, to multi-resource transmission with, for example, transmit power scaling and virtualization. [Background technology]

[0002] The 3rd Generation Partnership Project (3GPP) has developed and is developing wireless standards for fourth-generation (4G) (also known as Long Term Evolution (LTE)) and fifth-generation (5G) (also known as New Radio (NR)) wireless communication systems. Such systems provide, among other things, broadband communications between network nodes, such as base stations, and mobile wireless devices (WDs), as well as communications between network nodes and between WDs.

[0003] In the time domain, NR downlink (DL) and uplink (UL) transmissions consist of equal-sized subframes of 1 ms each. Subframes are further divided into one or more slots of equal duration. The slot length depends on the subcarrier spacing. For a subcarrier spacing of 15 kHz, there is only one slot per subframe. Generally, it is 15×2 μ kHz subcarrier spacing, where μ∈{0,1,2,3,4}, 2 per subframe μ slots. Ultimately, each slot consists of 14 symbols (unless an extended cyclic prefix is ​​configured).

[0004] In the frequency domain, the system bandwidth is divided into RBs, which correspond to 12 consecutive subcarriers. One subcarrier in one symbol interval forms one RE.

[0005] UL transmission / precoding method The channel that carries data in the NR UL is called the Physical Uplink Shared Channel (PUSCH). There are two waveforms that can be used for PUSCH in NR: CP-OFDM and DFT-S-OFDM. In addition, two transmission schemes are specified for PUSCH: codebook (CB)-based precoding and NCB-based precoding.

[0006] A network node (such as a gNB) configures the transmission scheme via the higher layer parameter txConfig in the PUSCH-Config IE in RRC. CB-based transmission can be used for non-calibrating wireless devices and / or FDD (i.e., there is no need to maintain UL / DL reciprocity), whereas NCB-based transmission is intended for TDD since it relies on UL / DL reciprocity.

[0007] CB-based Precoding Codebook-based (“CB-based”) uplink multiple-input multiple-output (MIMO) operation in NR can be described as follows for the case where CP-OFDM is used for transmission.

[0008] A transport block is provided by the upper layer, and error correction is coded into the coded bits and mapped to a codeword. Typically, a codeword contains the coded bits of an individual transport block. In FIG. 1, CW is a MIMO codeword. 3GPP Rel-17 NR supports only one MIMO codeword in the uplink, but two codewords in the downlink. The codeword is modulated and mapped to a separate set of r layers, where a layer contains only the coded bits from its respective codeword, and each layer is multiplexed with its own reference signal (Demodulation Reference Signal (DMRS) in NR) that identifies that layer and can be used to estimate the channel through which the layer passes. In the multiplexing, the DMRS is mapped to a predefined reference element (RE) that does not contain upper layer data, and the DMRS is added to the data containing the modulation symbols. Then, for each transmit antenna, a precoding matrix W that adjusts the gain and phase of each layer differently is calculated. k The layers are precoded using the precoded 1-D ...

[0009] Precoding can also be described as representing modulation symbols transmitted simultaneously on the same time-frequency resource elements (TFRE), such as resource elements (RE) in NR, as an information-carrying symbol vector s. A vector is formed with one modulation symbol per layer and multiplied by an N×r precoder matrix W, which is used to distribute the transmit energy over a subspace of the N-dimensional vector space (corresponding to the N antenna ports). The result after multiplication can also be referred to as a set of precoded layers. Each precoded layer is mapped to a transmit antenna of the wireless device, and each transmit antenna can be identified with an antenna port.

[0010] A precoding matrix (or "precoder") is typically selected from a codebook of possible precoder matrices and is typically indicated by a transmit precoder matrix indicator (TPMI), which specifies a unique precoder matrix in the codebook for a given number of symbol streams. Each of the r symbols in s corresponds to a layer, where r is referred to as the transmission rank or number of layers. In this way, multiple symbols can be transmitted simultaneously over the same TFRE, thus achieving spatial multiplexing. The number of layers r is typically tailored to the current channel properties.

[0011] Therefore, the reception N of a particular TFRE (or data TFRE number n) on subcarrier n R x1 vector y n teeth, y n =H n Ws n +e n formula 1 It is modeled as follows.

[0012] Here, e n is the noise / interference vector obtained as a realization of a random process. The precoder W can be either a wideband precoder that is constant over frequency, or multiple precoders W that are used for each of a subset of the subcarriers of the transmission, in which case the transmission is said to be frequency selective.

[0013] The precoder matrix W is the MIMO channel matrix H n The precoder matrix W is often chosen to match the characteristics of W, resulting in so-called channel-dependent precoding. This is commonly also called closed-loop precoding, and aims to concentrate the transmission energy in a subspace that is powerful in the sense that it transfers much of the transmission energy from the wireless device to the receiver in the network. Furthermore, the precoder matrix W is chosen to orthogonalize the channel, which means that after appropriate linear equalization at the wireless device, the inter-layer interference is reduced. One example of how the wireless device selects the precoder matrix W is based on an assumed equivalent channel:

[0014]

number

[0015] In NR uplink closed-loop precoding, a network node such as a gNodeB ("gNB") transmits a TPMI to a wireless device for the wireless device to use on its uplink antennas based on channel measurements on the reverse link (uplink). The network node (such as a gNodeB or gNB) configures the wireless device to transmit a sounding reference signal (SRS) depending on the number of wireless device antennas the wireless device wants to use for uplink transmission to enable channel measurements. A single precoder that can cover a wide bandwidth (wideband precoding) can be signaled.

[0016] Typically, information other than TPMI, such as SRS resource indicator (SRI) and transmission rank indicator (TRI), are also used to determine the UL MIMO transmission status. Note that in 3GPP Rel-17 NR, TPMI and SRI are jointly coded in the precoding and number of layers field of the control signaling. These parameters, as well as the modulation and coding scheme (MCS) and the uplink resources on which the PUSCH is transmitted, are determined by channel measurements obtained from the SRS transmission from the wireless device. The transmission rank, and therefore the number of layers that are spatially multiplexed, is reflected in the number of columns of the precoder W. For efficient performance, it is important to select a transmission rank that matches the channel properties.

[0017] For CB-based PUSCH, the higher layer parameter txConfig is a "codebook" For dynamically scheduled PUSCH with configured grant type 2, CB-based PUSCH transmission can be summarized as the following steps: 1. The wireless device transmits an SRS configured with an SRS resource set with the upper layer parameter usage of the SRS-ConfigIE set to "codebook". The SRS resource set can configure up to two SRS resources (to test up to two virtualizations / beams / panels), each with up to four ports. 2. The network node determines the number of layers (or rank) and preferred precoder (TPMI) from the codebook subset based on the received SRS from one of the SRS resources. The codebook subset is configured via the higher layer parameter codebookSubset based on the reported wireless device capabilities. ·Fully coherent ("fullyAndPartialAndNonCoherent"), partially coherent ("partialAndNonCoherent"), or Non-coherent It is. 3. If two SRS resources are configured in the SRS resource set, the network node indicates the selected SRS resource via the 1-bit SRI field of the DCI for scheduling the PUSCH transmission. If only one SRS resource is configured in the SRS resource set, the SRI field is not indicated in the DCI. 4. The network node indicates the number of layers and the TPMI via the DCI. The DM-RS port associated with the layer is also indicated in the DCI. The number of layers (if transform precoding is enabled, the number of PUSCH layers is limited to 1) and the number of bits of the DCI used to indicate the TPMI are determined as follows (the number of bits may be different if UL full power transmission is not configured): 4, 5, or 6 bits if the number of antenna ports is 4, transform precoding is disabled, and the higher layer parameter maxRank in the PUSCH-ConfigIE is set to 2, 3, or 4 (see Table 1). 2, 4, or 5 bits if the number of antenna ports is 4, transform precoding is disabled or enabled, and the higher layer parameter maxRank in the PUSCH-ConfigIE is set to 1 (see Table 2). 2 or 4 bits if the number of antenna ports is 2, transform precoding is disabled, and the higher layer parameter maxRank in the PUSCH-ConfigIE is set to 2 (see Table 3). 1 or 3 bits if the number of antenna ports is 2, transform precoding is disabled or enabled, and the higher layer parameter maxRank in the PUSCH-ConfigIE is set to 1 (see Table 4). · 0 bit if one antenna port is used for PUSCH transmission.

[0018] The wireless device performs PUSCH transmission via the antenna port corresponding to the SRS port within the indicated SRS resource.

[0019] [Table 1]

[0020] [Table 2]

[0021] [Table 3]

[0022] [Table 4]

[0023] For a particular number of layers, the TPMI field indicates the precoding matrix that the wireless device uses for the PUSCH. In a first example, when the number of antenna ports is 4, the number of layers is 1, and transform precoding is disabled, the set of possible precoding matrices is shown in Table 5. In a second example, when the number of antenna ports is 4, the number of layers is 4, and transform precoding is disabled, the set of possible precoding matrices is shown in Table 6.

[0024] [Table 5]

[0025] [Table 6]

[0026] NCB-based Precoding The NCB-based UL transmission is for reciprocity-based UL transmission where SRS precoding is derived at the wireless device based on the channel state information reference signal (CSI-RS) received in the DL. Specifically, the wireless device measures the received CSI-RS, infers appropriate precoder weights for the SRS transmission, and generates one or more (virtual) SRS ports, each corresponding to a spatial layer.

[0027] A wireless device may be configured with up to four SRS resources, each with one (virtual) SRS port, in an SRS resource set with the higher layer parameter usage in the SRS-ConfigIE set to "nonCodebook". The wireless device transmits uplink on the four SRS resources, and the network node measures the UL channel based on the received SRS and determines the preferred SRS resource. The network node then indicates the selected SRS resource via the SRI field of the DCI, and the wireless device uses this information to precode the PUSCH with a transmission rank equal to the indicated number of SRS resources (i.e., the number of SRS ports).

[0028] SRS In NR, SRS is used to provide UL channel state information (CSI) to network nodes (e.g. gNBs). Usage of SRS includes deriving appropriate transmit / receive beams, performing link adaptation (setting transmission rank and MCS), selecting DL (e.g. PDSCH transmission) and UL (e.g. PUSCH transmission) MIMO precoding, etc.

[0029] In LTE and NR, SRS is configured via Radio Resource Control (RRC), and parts of the configuration can be updated via MAC-CE signaling (to reduce latency). Configuration includes, for example, SRS resource allocation (physical mapping and sequence to use) and time domain behavior (aperiodic, semi-persistent, or periodic). For aperiodic SRS transmission, RRC configuration does not activate SRS transmission from the wireless device; instead, in DL, a dynamic activation trigger is sent from the network node via DCI on the PDCCH, which instructs the wireless device to transmit SRS once at a given time.

[0030] When configuring SRS transmission, the network node configures a set of SRS resources and a set of SRS resource sets via an SRS-ConfigIE, where each SRS resource set includes one or more SRS resources.

[0031] SRS Configuration Each SRS resource is configured in the RRC as follows (eg, ASN code in 3GPP specifications such as 3GPP TS38.331 version 16.1.0): [Table 7] [Table 8]

[0032] SRS resources are configurable, for example, in terms of: 1) The number of SRS ports (1, 2, or 4) configured by the RRC parameter nrofSRS-Ports. 2) A transmission comb (i.e., mapping every second or fourth subcarrier) configured by the RRC parameter transmissionComb, which includes: (1) The comb offset configured by the RRC parameter combOffset is specified (i.e., which comb to use). (2) Cyclic shift, configured by the RRC parameter cyclicShift, which sets the cyclic shift (port-specific for multi-port SRS resources) of the Zadoff-Chu sequence used for SRS. Using cyclic shift increases the number of SRS resources that can be mapped to a comb (because the SRS sequences are designed to be (near) orthogonal under cyclic shifts). However, there is a limit to the number of cyclic shifts that can be used (8 for Com 2, 12 for Com 4). 3) The time domain location within a given slot, configured in the RRC parameter resourceMapping, which includes: (1) The start position of the time domain, configured with the RRC parameter startPosition, which is restricted to one of the last 6 symbols (for NR 3GPP Rel-15) or one of the 14 symbols in the slot (for NR 3GPP Rel-16). (2) The number of symbols for the SRS resource, configured by the RRC parameter nrofSymbols (which can be set to 1, 2, or 4). (3) The repetition factor, configured by the RRC parameter repetitionFactor, which can be set to 1, 2, or 4. When the repetition factor is greater than 1, the same frequency resource is used multiple times between symbols, which increases the energy that the receiver can collect and is therefore used to improve coverage. 4) The sounding bandwidth, frequency domain position and shift, and frequency hopping pattern (i.e., the portion of the transmission bandwidth occupied by the SRS resource) of the SRS resource are configured through the RRC parameters freqDomainPosition, freqDomainShift, and freqHopping parameters c-SRS, b-SRS, and b-hop. The minimum sounding bandwidth is 4 RBs. 5) The RRC parameter resourceType determines whether the SRS resource is transmitted periodic, aperiodic (single transmission triggered by DCI), or semi-persistent (same as periodic except that the start and stop of the periodic transmission is controlled by MAC-CE signaling instead of RRC signaling). 6) The RRC parameter sequenceId specifies how to initialize the SRS sequence. 7) The RRC parameter spatialRelationInfo configures the spatial relationship of an SRS beam to another RS ​​(which may be another SRS, SSB, or CSI-RS). If an SRS resource has a spatial relationship with another SRS resource, this SRS resource may be transmitted in the same beam (i.e., virtualization) as the indicated SRS resource.

[0033] How SRS resources are allocated in time and frequency within a slot (note that semi-persistent / periodic SRS resources typically span multiple slots) is shown in Figure 2. In NR Rel-16, an additional (optional) RRC parameter, resourceMapping-r16, was introduced. If resourceMapping-r16 is signaled, the wireless device may ignore the RRC parameter resourceMapping. The difference between resourceMapping-r16 and resourceMapping is that the SRS resource (number of OFDM symbols and repetition factor are still limited to 4) can start at any of the 14 OFDM symbols within a slot configured by the RRC parameter startPosition-r16.

[0034] The SRS resource set is configured in the RRC as follows (eg, ASN code in 3GPP TS38.331 version 16.1.0): [Table 9] [Table 10]

[0035] SRS resources are transmitted as part of an SRS resource set, where all SRS resources within the same SRS resource set are required to share the same resource type. An SRS resource set can be configured, for example, in terms of: 8) For aperiodic SRS, the slot offset is configured by the RRC parameter slotOffset and sets the delay from PDCCH trigger reception to the start of SRS transmission. 9) Resource usage, configured by the RRC parameter usage, sets constraints and assumptions on resource properties (more details can be found in 3GPP specifications such as 3GPP TS38.214). SRS resource sets can be configured with one of four different usages: "antennaSwitching", "codebook", "nonCodebook" and "beamManagement". 10) The SRS resource set configured for "antennaSwitching" usage is used for reciprocity-based DL precoding (i.e., used to sound the channel in the UL so that the network node can use reciprocity to set the appropriate DL precoder). The wireless device is expected to transmit one SRS port per antenna port of the wireless device. (1) The SRS resource set configured for "codebook" usage is used for CB-based UL transmission (i.e., to sound various wireless device antennas and help the network node determine / signal the appropriate UL precoder, transmission rank, and MCS for PUSCH transmission). There are up to two SRS resources in the SRS resource set for "codebook" usage. However, how the SRS ports are mapped to the wireless device antenna ports is up to the wireless device implementation and is unknown to the network node. (2) The SRS resource set configured for "nonCodebook" use is used for NCB-based UL transmission. Specifically, the wireless device transmits one SRS resource for each candidate beam (the appropriate candidate beam is determined by the wireless device based on DL CSI-RS measurements, so reciprocity must be maintained). The network node can then indicate a subset of these SRS resources to determine which UL beam the wireless device applies to PUSCH transmission. One UL layer may be transmitted for each indicated SRS resource. Note that how the wireless device maps SRS ports to antenna ports is determined by the wireless device implementation and is not known to the network node. 11) For each possible resource type, the associated CSI-RS (this configuration applies only to NCB-based UL transmissions). (1) In the case of aperiodic SRS, the associated CSI-RS resource is configured by the RRC parameter csi-RS. (2) In case of semi-persistent / periodic SRS, the associated CSI-RS resource is configured by the RRC parameter associatedCSI-RS. 12) PC parameters (e.g., alpha and p0) are used to set the SRS transmit power. SRS has its own UL PC scheme in NR (e.g., details of which are described in 3GPP specifications such as 3GPP TS38.213) that specifies how the wireless device divides the available output power between two or more SRS ports during one SRS transmission opportunity (a time window within a slot during which an SRS transmission occurs).

[0036] In summary, the SRS resource set configuration determines, for example, aperiodic SRS usage, power control, slot offsets, etc. The SRS resource configuration determines time and frequency allocation, periodicity and offsets, sequences, and spatial relationship information.

[0037] UL Power Control Setting the output power levels of transmitters, network nodes in the downlink, and mobile stations in the uplink in a mobile system is commonly referred to as power control (PC). The objectives of PC include improving capacity, coverage, improving system robustness, reducing power consumption, etc.

[0038] NR PC mechanisms can be classified into the following groups: (i) open loop, (ii) closed loop, and (iii) combined open and closed loop. They differ in the inputs used to determine the transmit power. In the open loop case, the transmitter measures the signal transmitted from the receiver and sets the output power based on this. In the closed loop case, the receiver measures the signal from the transmitter and based on this sends a transmit power control (TPC) command to the transmitter, which sets the transmit power accordingly. In the combined open and closed loop scheme, both the inputs are used to set the transmit power.

[0039] In systems with multiple channels between terminals and network nodes, such as traffic and control channels, different power control principles can be applied to the different channels. Using different principles allows more freedom to adapt the power control principle to the needs of the individual channels. The drawback is the increased complexity of maintaining multiple principles.

[0040] PUSCH Power Control and Power Scaling in NR NR power control for UL MIMO consists of two components. First, the total transmit power P PUSCH,b,f,c (i,j,q d , l) and then scales the power and divides it among the antenna ports carrying the PUSCH. PUSCH,b,f,c (i,j,q d , l) is calculated according to section 7.1.1 of 3GPP TS38.213 v16.6.0 using the formula in the excerpt below:

[0041] UE Behavior When a wireless device transmits a PUSCH in an active UL BWP b of a carrier f of a serving cell c using a parameter set configuration with index j and a PUSCH power control adjustment state with index l, the wireless device determines a PUSCH transmit power P PUSCH,b,f,c (i,j,q d ,l)

[0042]

number

[0043] According to 3GPP standards, for example 3GPP TS38.213, section 7.1, this total transmit power is converted from decibels to a linear power value P^ PUSCH,b,f,c (i,j,q d ,l). If full power mode is configured, this power is scaled by a factor s≦1 to take into account the power available in each Tx chain. If uplink full power mode is not configured but codebook-based operation is used, the power is scaled by the number of ports actively transmitting PUSCH divided by the maximum number of SRS ports in one SRS resource supported by the wireless device (i.e., the number of Tx chains of the wireless device on the carrier). If DCI format 0_0 or non-codebook-based precoding is used, the power is not scaled.

[0044] After scaling (if any) is applied, the power is split evenly among the antenna ports from which the UE transmits PUSCH.

[0045] It can be seen that the above NR power control splits the power equally among the PUSCH layers. Furthermore, the number of occupied PRBs for PUSCH transmission is one, and M PUSCH RB,b,f,c is used to scale up the power in the power control equation. The case where the PUSCH layer is in a different PRB set than the PRBs of another layer is not supported in NR Release 17 in general, especially with regard to power control and power scaling. Thus, existing systems are not without issues. Summary of the Invention [Problem to be solved by the invention]

[0046] Certain embodiments advantageously provide methods, systems, and apparatus for multi-resource transmission, eg, with transmit power scaling and virtualization. [Means for solving the problem]

[0047] Codebook-based UL transmission for wireless devices with four or more transmit ports is supported by simultaneously transmitting layers according to multiple SRS resources, where a separate precoder is applied to each of the multiple SRS resources and different layers can be precoded by the precoder. The number of ports supported for simultaneous transmission is the total number of ports in the SRS resource. This not only increases the number of Tx chains supported in the wireless device, but also allows the number of layers to be increased beyond that of Rel-17. One focus of this disclosure is how to split the power within and between sets of Tx chains corresponding to different SRS resources (i.e., "power scaling") and how Tx chains can be virtualized to provide more power or precoding gain. Additional aspects include how to map layers to transmit coherently or non-coherently between antenna ports corresponding to SRS resources and how to carry different codewords on different layer sets corresponding to SRS resources.

[0048] According to one aspect of the disclosure, a network node for communicating with a wireless device is provided, the network node including a processing circuit configured to: configure the wireless device with a plurality of SRS resources; cause the wireless device to transmit a first indication of a first precoder for use with a first antenna port signal set associated with a first SRS resource of the plurality of SRS resources, the processing circuit configured to transmit a first indication of a first precoder for use with a first antenna port signal set associated with a first SRS resource of the plurality of SRS resources, the processing circuit configured to transmit a second indication of a second precoder for use with a second antenna port signal set associated with a second SRS resource of the plurality of SRS resources, the processing circuit configured to receive a transmission of the physical channel, the first physical channel portion and the second physical channel portion forming a first signal power and a second signal power based on the first indication and the second indication, respectively, each antenna port signal in the first antenna port signal set based on a number of antenna ports in the first antenna port signal set of non-zero power and each antenna port signal in the second antenna port signal set based on a number of antenna ports in the second antenna port signal set of non-zero power.

[0049] According to some embodiments of this aspect, the total constituent signal power of a physical channel is based on an equal or unequal division across non-zero power antenna port signals of a first antenna port signal set, or across ports corresponding to each resource, the division being based on a controlled ratio of the first power signal and the second power signal, or on a power control parameter for independently controlling the first power signal and the second power signal.

[0050] According to some embodiments of this aspect, the physical channel includes a first set of transmission layers precoded with a first precoder to generate a first antenna port signal set corresponding to a first physical channel portion and a second set of transmission layers precoded with a second precoder to generate a second antenna port signal set corresponding to a second physical channel portion, the first signal power based at least in part on a multiplication of a power of each antenna port signal in the first antenna port signal set by a number of non-zero power antenna ports in the first antenna port signal set, and the second signal power based at least in part on a multiplication of a power of each antenna port signal in the second antenna port signal set by a number of non-zero power antenna ports in the second antenna port signal set.

[0051] According to some embodiments of this aspect, a first layer set and a second layer set of transmission layers are mapped to a first set and a second set of DMRS ports, where the first set of DMRS ports corresponds only to the first set of transmission layers and the second set of DMRS ports corresponds only to the second set of transmission layers.

[0052] According to some embodiments of this aspect, the first SRS resource and the second SRS resource each include less than N ports, where N is a value corresponding to one of a maximum number of transmission layers and a maximum number of SRS ports that the wireless device can transmit.

[0053] According to some embodiments of this aspect, the first signal power and the second signal power are values ​​based on dividing the first signal power and the second signal power by N.

[0054] According to some embodiments of this aspect, the first and second signal powers are based on dividing the first and second signal powers by a first and second number of SRS ports, respectively, which are the number of SRS ports in the first and second SRS resources, respectively, and the first signal power is divided evenly among the antenna port signals of the first antenna port signal set and the second signal power is divided evenly among the antenna port signals of the second antenna port signal set.

[0055] According to some embodiments of this aspect, the physical channel signaling corresponds to a physical uplink shared channel.

[0056] According to another aspect of the present disclosure, a wireless device in communication with a network node is provided, the wireless device including a processing circuit configured to: receive signaling for configuring the wireless device with a plurality of SRS resources; receive a first indication of a first precoder for use with a first antenna port signal set carrying a first portion of a physical channel and associated with a first SRS resource of the plurality of SRS resources; receive a second indication of a second precoder for use with a second antenna port signal set carrying a second portion of the physical channel and associated with a second SRS resource of the plurality of SRS resources; adjust first and second physical channel portions forming first and second signal powers according to the first and second indications, where each antenna port signal in the first antenna port signal set is adjusted by a number of non-zero power antenna ports of the first antenna port signal set and each antenna port signal in the second antenna port signal set is adjusted by a number of non-zero power antenna ports of the second antenna port signal set; and cause the physical channel to be transmitted.

[0057] According to some embodiments of this aspect, the total constituent signal power of the physical channel is based on an equal or unequal division across the non-zero power antenna port signals of the first antenna port signal set, or across ports corresponding to each resource, the division being based on a controlled ratio of the first power signal and the second power signal, or on a power control parameter for independently controlling the first power signal and the second power signal.

[0058] According to some embodiments of this aspect, the processing circuitry further includes: precoding a first set of transmission layers with the first precoder to generate a first antenna port signal set corresponding to a first physical channel portion; precoding a second set of transmission layers with a second precoder to generate a second antenna port signal set corresponding to a second physical channel portion; adjusting a first signal power based at least in part on multiplying a power of each antenna port signal in the first antenna port signal set by a number of non-zero power antenna ports in the first antenna port signal set; and adjusting a second signal power based at least in part on multiplying a power of each antenna port signal in the second antenna port signal set by a number of non-zero power antenna ports in the second antenna port signal set. The apparatus is configured to perform the following:

[0059] According to some embodiments of this aspect, the processing circuitry is further configured to map the first and second sets of transmission layers to the first and second sets of DMRS ports, where the first set of DMRS ports corresponds only to the first set of transmission layers and the second set of DMRS ports corresponds only to the second set of transmission layers.

[0060] According to some embodiments of this aspect, each of the first SRS resource and the second SRS resource includes less than N ports, where N is a value corresponding to one of a maximum number of transmission layers and a maximum number of SRS ports that the wireless device can transmit.

[0061] According to some embodiments of this aspect, the processing circuitry is further configured to additionally adjust the first and second signal powers by dividing the first and second signal powers by N.

[0062] According to some embodiments of this aspect, the processing circuitry is further configured to additionally adjust the first and second signal powers by dividing the first and second signal powers by a first and second number of SRS ports, where the first and second numbers of SRS ports are the numbers of SRS ports in the first SRS resource and the second SRS resource, respectively; equally divide the adjusted first signal power among the antenna port signals of the first set of antenna port signals; and equally divide the adjusted second signal power among the antenna port signals of the second set of antenna port signals.

[0063] According to some embodiments of this aspect, the physical channel signaling corresponds to a physical uplink shared channel.

[0064] According to another aspect of the disclosure, there is provided a method performed by a network node in communication with a wireless device, the method including configuring the wireless device with a plurality of SRS resources, causing a first portion of a physical channel to be carried and transmit a first indication of a first precoder to be used with a first antenna port signal set associated with a first SRS resource of the plurality of SRS resources, causing a second portion of the physical channel to be carried and transmit a second indication of a second precoder to be used with a second antenna port signal set associated with a second SRS resource of the plurality of SRS resources, and receiving a transmission of the physical channel, the first physical channel portion and the second physical channel portion forming first and second signal powers based on the first and second indications, respectively, each antenna port signal in the first antenna port signal set based on a number of non-zero power antenna ports of the first antenna port signal set and each antenna port signal in the second antenna port signal set based on a number of non-zero power antenna ports of the second antenna port signal set.

[0065] According to some embodiments of this aspect, the total constituent signal power of the physical channel is based on an equal or unequal division across the non-zero power antenna port signals of the first antenna port signal set, or across ports corresponding to each resource, the division being based on a controlled ratio of the first power signal and the second power signal, or on a power control parameter for independently controlling the first power signal and the second power signal.

[0066] According to some embodiments of this aspect, the physical channel includes a first set of transmission layers precoded with a first precoder to generate a first antenna port signal set corresponding to a first physical channel portion and a second set of transmission layers precoded with a second precoder to generate a second antenna port signal set corresponding to a second physical channel portion, the first signal power based at least in part on a multiplication of a power of each antenna port signal in the first antenna port signal set by a number of non-zero power antenna ports in the first antenna port signal set, and the second signal power based at least in part on a multiplication of a power of each antenna port signal in the second antenna port signal set by a number of non-zero power antenna ports in the second antenna port signal set.

[0067] According to some embodiments of this aspect, the first and second sets of transmission layers are mapped to the first and second sets of DMRS ports, with the first set of DMRS ports corresponding only to the first set of transmission layers and the second set of DMRS ports corresponding only to the second set of transmission layers.

[0068] According to some embodiments of this aspect, the first SRS resource and the second SRS resource each include less than N ports, where N is a value corresponding to one of a maximum number of transmission layers and a maximum number of SRS ports that the wireless device can transmit.

[0069] According to some embodiments of this aspect, the first signal power and the second signal power are values ​​based on dividing the first signal power and the second signal power by N.

[0070] According to some embodiments of this aspect, the first and second signal powers are values ​​based on dividing the first and second signal powers by a first and second number of SRS ports, respectively, which are the numbers of SRS ports in the first SRS resource and the second SRS resource, respectively, and the first signal power is divided evenly among the antenna port signals in the first antenna port signal set and the second signal power is divided evenly among the antenna port signals in the second antenna port signal set.

[0071] According to some embodiments of this aspect, the physical channel signaling corresponds to a physical uplink shared channel.

[0072] According to another aspect of the present disclosure, a method is provided that is performed by a wireless device in communication with a network node, the method including receiving signaling for configuring the wireless device with a plurality of SRS resources, receiving a first indication of a first precoder for use with a first antenna port signal set carrying a first portion of a physical channel and associated with a first SRS resource of the plurality of SRS resources, receiving a second indication of a second precoder for use with a second antenna port signal set carrying a second portion of the physical channel and associated with a second SRS resource of the plurality of SRS resources, adjusting (S156) a first physical channel portion and a second physical channel portion forming a first signal power and a second signal power according to the first indication and the second indication, where each antenna port signal of the first antenna port signal set is adjusted by a number of non-zero power antenna ports of the first antenna port signal set and each antenna port signal of the second antenna port signal set is adjusted by a number of non-zero power antenna ports of the second antenna port signal set, and causing the physical channel to be transmitted.

[0073] According to some embodiments of this aspect, the total constituent signal power of the physical channel is based on an equal or unequal division across the non-zero power antenna port signals of the first antenna port signal set, or across ports corresponding to each resource, the division being based on a controlled ratio of the first power signal and the second power signal, or on a power control parameter for independently controlling the first power signal and the second power signal.

[0074] According to some embodiments of this aspect, the method further includes precoding the first set of transmission layers with a first precoder to generate a first antenna port signal set corresponding to the first physical channel portion; precoding the second set of transmission layers with a second precoder to generate a second antenna port signal set corresponding to the second physical channel portion; adjusting the first signal power at least in part by multiplying a power of each antenna port signal in the first antenna port signal set by a number of non-zero power antenna ports in the first antenna port signal set; and adjusting the second signal power at least in part by multiplying a power of each antenna port signal in the second antenna port signal set by a number of non-zero power antenna ports in the second antenna port signal set.

[0075] According to some embodiments of this aspect, the method further includes mapping the first and second sets of transmission layers to first and second sets of DMRS ports, where the first set of DMRS ports corresponds only to the first set of transmission layers and the second set of DMRS ports corresponds only to the second set of transmission layers.

[0076] According to some embodiments of this aspect, each of the first SRS resource and the second SRS resource includes less than N ports, where N is a value corresponding to one of a maximum number of transmission layers and a maximum number of SRS ports that the wireless device can transmit.

[0077] According to some embodiments of this aspect, the method further includes additionally adjusting the first and second signal powers by dividing the first and second signal powers by N.

[0078] According to some embodiments of this aspect, the method further includes additionally adjusting the first and second signal powers by dividing the first and second signal powers by a first and second number of SRS ports, where the first and second numbers of SRS ports are numbers of SRS ports in the first SRS resource and the second SRS resource, respectively; dividing the adjusted first signal power evenly among the antenna port signals of the first antenna port signal set; and dividing the adjusted second signal power evenly among the antenna port signals of the second antenna port signal set.

[0079] According to some embodiments of this aspect, the physical channel signaling corresponds to a physical uplink shared channel.

[0080] A more complete understanding of the present embodiments, together with their attendant advantages and features, will be readily appreciated by reference to the following detailed description, when considered in conjunction with the accompanying drawings, in which: [Brief description of the drawings]

[0081] [Figure 1] 1 is a diagram showing CB-based precoding. [Diagram 2] A diagram showing the allocation of time and frequency in the list when resourceMapping-r16 is not signaled. [Diagram 3] 1 is a schematic diagram of an exemplary network architecture illustrating a communication system connected to a host computer through an intermediate network in accordance with the principles of the present disclosure; [Figure 4] 1 is a block diagram of a host computer communicating with a wireless device via a network node over at least a partial wireless connection in accordance with some embodiments of the present disclosure. [Diagram 5]4 is a flowchart illustrating an example method performed in a communication system including a host computer, a network node, and a wireless device for executing a client application on the wireless device, according to some embodiments of the present disclosure. [Figure 6] 4 is a flowchart illustrating an example method performed in a communication system including a host computer, a network node, and a wireless device for receiving user data at the wireless device, according to some embodiments of the present disclosure. [Figure 7] 4 is a flow chart illustrating an example method performed in a communication system including a host computer, a network node, and a wireless device for receiving user data at a host computer from a wireless device, according to some embodiments of the present disclosure. [Figure 8] 4 is a flowchart illustrating an example method performed for receiving user data at a host computer in a communication system including a host computer, a network node, and a wireless device, according to some embodiments of the present disclosure. [Figure 9] 4 is a flowchart of an example process in a network node according to some embodiments of the present disclosure. [Figure 10] 6 is a flowchart of another example process in a network node according to some embodiments of the present disclosure. [Figure 11] 5 is a flowchart of an example process in a wireless device according to some embodiments of the present disclosure. [Figure 12] 6 is a flowchart of another example process in a wireless device according to some embodiments of the present disclosure. [Figure 13] A diagram of multi-SRS resource transmission with precoding for each SRS resource. [Figure 14] 1 is a diagram of multi-SRS resource transmission in which layers may be mapped to different resources. [Figure 15] 1 is an illustration of a multi-SRS resource transmission using multiple codewords. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0082] As mentioned above, conventional NR CB-based UL transmission is limited to a maximum of four ports (and a maximum of four layers). In 3GPP NR Rel-18, support for up to eight ports (and possibly more than four layers) for UL transmission is being considered. Specifically, the work item description for 3GPP NR Rel-18 includes the following goals:

[0083] Considerations: Consider and specify, where justified, enhancements to UL DMRS, SRS, SRI and TPMI (including codebook) to enable 8 Tx UL operation supporting 4 or more layers per radio device in UL for CPE / FWA / vehicle / industrial devices.

[0084] Note: Potential limitations to the scope of this goal (including consistency assumptions, full / non-full power modes) will be identified as part of the investigation.

[0085] In one example system, the wireless device transmits MIMO layers on different antenna subsets using designated precoders for the wireless device's antennas associated with each of the designated RS resources. This allows the wireless device to transmit using more ports or layers than would be possible with a single SRS resource of the same size. However, this example system does not describe methods for scaling power across antennas or SRS resources, virtualization approaches, layer mapping, and other details of codeword-to-layer mapping.

[0086] In another system example, an SRS extension feature for sounding 6 and 8 Tx wireless devices was introduced, but it was not explained how the network node configures the precoding matrix and transmission rank for such wireless devices.

[0087] One or more embodiments described herein address at least a portion of one or more problems of existing systems. In one or more embodiments, power can be allocated in a manner suitable for wireless devices with limited power capabilities on each Tx chain, e.g., the power capability of each Tx chain is Pmax / N, where Pmax is the rated power of the wireless device and N is the number of Tx chains in the wireless device. Methods herein prevent the power required for a particular Tx chain from being exceeded. Methods are also provided that allow power to be controlled between a set of Tx chains ("panels") in a wireless device, allowing one or more network nodes to better control the SNR received from the panel. Power can also be shared between panels by mapping layers to multiple panels. Antennas within a panel can be virtualized to increase the power per antenna port. Multiple codewords can be conveyed to different panels to better match the received SNR of those panels.

[0088] Before describing the example embodiments in detail, it should be noted that the embodiments are primarily a combination of device components and processing steps related to, for example, multi-resource transmission with transmit power scaling and virtualization. Thus, components are described with conventional symbols in the drawings to show only the specific details relevant to understanding the embodiments of the present disclosure and in a manner that does not obscure the present disclosure in a degree of detail that will be readily apparent to one of ordinary skill in the art having the benefit of the present disclosure. Like reference numerals refer to like components throughout the present disclosure.

[0089] As used herein, relational terms such as "first," "second," "upper," and "lower" are used only to distinguish one entity or element from another entity or element without implying or requiring a physical or logical relationship or order between such entities or elements. The terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the concepts described herein. The singular forms are intended to include the plural forms unless the context clearly indicates otherwise. As used herein, the terms "including," "comprising," and / or "having" specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0090] In the embodiments described herein, terms such as "communicate with" may be used to indicate electrical or data communication that may be accomplished by physical contact, induction, electromagnetic radiation, radio signals, infrared signals, or optical signals. Those skilled in the art will appreciate that multiple components can interoperate and modifications and variations are possible to accomplish electrical and data communication.

[0091] In some embodiments, the terms "coupled" and "connected" are used to indicate a connection, which is not necessarily direct, and may include wired and / or wireless connections.

[0092] The term "network node" as used herein may be any type of network node included in a wireless network, which may include a base station (BS), a radio base station, a base transceiver station (BTS), a base station controller (BSC), a radio network controller (RNC), a gNodeB (gNB), an evolved NodeB (eNB or eNodeB), a NodeB, a multi-standard radio (MSR) radio node such as an MSR BS, a multi-cell / multicast coordination entity (MCE), a relay node, a donor node controlling a relay, a radio access point (AP), a transmission point, a transmitting node, a remote radio unit (RRU), a remote radio head (RRH), a core network node (mobile management entity (MME), a self-organizing network (SON) node, a coordination node, a positioning node, an MDT node, etc.), an external node (e.g., a third party node, a node outside the current network), a node of a distributed antenna system (DAS), a spectrum access system (SAS) node, an element management system (EMS), etc. A network node may also include test equipment. As used herein, the term "wireless node" may also be used to denote a wireless device (WD) such as a wireless device (WD) or a wireless network node.

[0093] In some embodiments, the non-limiting terms wireless device (WD) or user equipment (UE) are used interchangeably. A WD in this specification may be any type of wireless device that can communicate with a network node or another WD via wireless signals, such as a wireless device (WD). A WD may include a wireless communication device, a target device, a device-to-device (D2D) WD, a machine-type WD, or a WD capable of machine-to-machine (M2M) communication, a low-cost and / or low-complexity WD, a sensor-equipped WD, a tablet, a mobile terminal, a smartphone, a laptop embedded equipment (LEE), a laptop mounted equipment (LME), a USB dongle, a customer premises equipment (CPE), an Internet of Things (IoT) device, or a narrowband IoT (NB-IOT) device, etc.

[0094] Also, in some embodiments, the general term "radio network node" is used, which may be any type of radio network node, which may include a base station, radio base station, base transceiver station, base station controller, network controller (RNC), evolved Node B (eNB), Node B, gNB, multi-cell / multicast coordination entity (MCE), IAB node, relay node, access point, radio access point, remote radio unit (RRU), or remote radio head (RRH).

[0095] It should be noted that although terminology from one particular wireless system, such as 3GPP LTE and / or New Radio (NR), may be used in this disclosure, this should not be considered as limiting the scope of this disclosure to only the aforementioned systems. Other wireless systems, including but not limited to Wideband Code Division Multiple Access (WCDMA), Worldwide Interoperability for Microwave Access (WiMax), Ultra Mobile Broadband (UMB), and Global System for Mobile Communications (GSM), can also benefit from utilizing the ideas covered in this disclosure.

[0096] Furthermore, it should be noted that functionality described herein as being performed by a wireless device or a network node may be distributed across multiple wireless devices and / or network nodes, in other words, the functionality of the network nodes and wireless devices described herein is not limited to being performed by a single physical device, but may in fact be distributed among several physical devices.

[0097] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure belongs. Furthermore, terms used herein should be interpreted to have a meaning consistent with their meaning in the context of this specification and related art, and should not be interpreted in an ideal or overly formal sense unless expressly defined herein.

[0098] Some embodiments provide, for example, multi-resource transmission with transmit power scaling and virtualization.

[0099] Referring again to the drawings, in which like elements are referred to by like reference numerals, FIG. 3 shows a schematic of a communication system 10, such as a 3GPP-type cellular network that may support standards such as LTE and / or NR (5G), including an access network 12, such as a radio access network, and a core network 14, according to one embodiment. The access network 12 has a number of network nodes 16a, 16b, 16c, such as NBs, eNBs, gNBs or other types of wireless access points (collectively referred to as network nodes 16), each defining a corresponding coverage area 18a, 18b, 18c (collectively referred to as coverage area 18). Each network node 16a, 16b, 16c is connectable to the core network 14 via a wired or wireless connection 20. A first wireless device (WD) 22a located in the coverage area 18a is configured to wirelessly connect to or be paged by a corresponding network node 16c. A second WD 22b in the coverage area 18b is wirelessly connectable to a corresponding network node 16b. Although multiple WDs 22a, 22b (collectively referred to as wireless devices 22) are shown in this example, the disclosed embodiments are equally applicable to situations where a single WD is in a coverage area or where a single WD is connected to a corresponding wireless network node 16. For convenience, only two WDs 22 and three network nodes 16 are shown, but it should be noted that a communication system may include many more WDs 22 and network nodes 16.

[0100] Additionally, the WD 22 may be configured to simultaneously and / or separately communicate with multiple network nodes 16 and more than one type of network node 16. For example, the WD 22 may have dual connectivity with a network node 16 supporting LTE and the same or a different network node 16 supporting NR. As an example, the WD 22 may communicate with an eNB of LTE / E-UTRAN and a gNB of NR / NG-RAN.

[0101] The communication system 10 itself may be connected to a host computer 24, which may be embodied by hardware and / or software of a standalone server, a cloud-implemented server, a distributed server, or as processing resources of a server farm. The host computer 24 may be under the ownership or control of a service provider, or may be operated by or on behalf of the service provider. The connection 26, 28 between the communication system 10 and the host computer 24 may extend directly from the core network 14 to the host computer 24, or may be via an optional intermediate network 30. The intermediate network 30 may be either a public, private, or hosted network, or a combination of one or more thereof. The intermediate network 30 may be a backbone or the Internet. In some embodiments, the intermediate network 30 may include two or more sub-networks (not shown).

[0102] The communication system of FIG. 3 as a whole enables a connection between one of the connected WDs 22a, 22b and the host computer 24. The connectivity may be described as an over-the-top (OTT) connection. The host computer 24 and the connected WDs 22a, 22b are configured to communicate data and / or signaling via the OTT connection using the access network 12, the core network 14, any intermediate networks 30, and possible further infrastructure (not shown) that are intermediaries. The OTT connection may be transparent in the sense that at least some of the participating communication devices through which the OTT connection passes are unaware of the routing of the uplink and downlink communications. For example, the network node 16 is not informed or does not need to be informed about the past routing of incoming downlink communications with data originating from the host computer 24 being forwarded (e.g., handed over) to the connected WD 22a. Similarly, the network node 16 does not need to be aware of the future routing of outgoing uplink communications from the WD 22a towards the host computer 24.

[0103] The network node 16 is configured to include a configuration unit 32 configured to implement one or more network node 16 functions described herein, such as for multi-resource transmission with transmit power scaling and virtualization. The wireless device 22 is configured to include a multi-resource unit 34 configured to implement one or more wireless device 22 functions described herein, such as for multi-resource transmission with transmit power scaling and virtualization.

[0104] An example implementation of the WD 22, the network node 16, and the host computer 24 described in the previous paragraph according to an embodiment will be described with reference to Fig. 4. In the communication system 10, the host computer 24 comprises hardware (HW) 38 including a communication interface 40 configured to set up and maintain a wired or wireless connection with interfaces of different communication devices of the communication system 10. The host computer 24 further comprises a processing circuit 42 that may have storage and / or processing capabilities. The processing circuit 42 may include a processor 44 and a memory 46. In particular, in addition to or instead of a processor such as a central processing unit and memory, the processing circuit 42 may include integrated circuits for processing and / or control, for example one or more processors and / or processor cores and / or FPGAs (field programmable gate arrays) and / or ASICs (application specific integrated circuits) adapted to execute instructions. The processing circuitry 44 is configured to access (e.g., write to and / or read from) memory 46, which may include any type of volatile and / or non-volatile memory, such as cache, and / or buffer memory, and / or RAM (random access memory), and / or ROM (read only memory), and / or optical memory, and / or EPROM (erasable programmable read only memory).

[0105] The processing circuitry 42 may be configured to control and / or cause any of the methods and / or processes described herein to be performed, for example, by the host computer 24. The processor 44 corresponds to one or more processors 44 for performing the functions of the host computer 24 described herein. The host computer 24 includes a memory 46 configured to store data, program software code, and / or other information described herein. In some embodiments, the software 48 and / or host application 50 may include instructions that, when executed by the processor 44 and / or the processing circuitry 42, cause the processor 44 and / or the processing circuitry 42 to perform the processes described herein in connection with the host computer 24. The instructions may be software associated with the host computer 24.

[0106] The software 48 may include instructions executable by the processing circuitry 42. The software 48 includes a host application 50. The host application 50 may be operable to provide services to a remote user, such as the WD 22, that connects with the WD 22 via an OTT connection 52 terminated at the host computer 24. In providing services to the remote user, the host application 50 may provide user data that is transmitted using the OTT connection 52. "User data" may be data and information described herein as implementing the described functionality. In one embodiment, the host computer 24 is configured to provide control and functionality to a service provider and may be operated by or on behalf of the service provider. The processing circuitry 42 of the host computer 24 may enable the host computer 24 to observe, monitor, control, and transmit and receive communications with the network nodes 16 and / or wireless devices 22. The processing circuitry 42 of the host computer 24 may include an information unit 54 configured to enable a service provider to perform one or more of the following: store, analyze, forward, relay, transmit, receive, communicate, configure, etc., information related to multi-resource transmission with transmit power scaling and virtualization as described herein, for example.

[0107] The communication system 10 further includes a network node 16 provided in the communication system 10 and comprising hardware 58 enabling communication with the host computer 24 and the UE 22. The hardware 58 may include a communication interface 60 for setting up and maintaining wired or wireless connections with interfaces of different communication devices of the communication system 10, and a radio interface 62 for setting up and maintaining at least a wireless connection 64 with the WD 22 in the coverage area 18 served by the radio network node 16. The radio interface 62 may be formed as or may include, for example, one or more RF transmitters, one or more RF receivers, and / or one or more RF transceivers. The communication interface 60 may be configured to facilitate a connection 66 to the host computer 24. The connection 66 may be direct or may pass through the core network 14 of the communication system 10 and / or one or more intermediate networks 30 outside the communication system 10.

[0108] In the illustrated embodiment, the hardware 58 of the network node 16 further includes processing circuitry 68. The processing circuitry 68 may include a processor 70 and a memory 72. In particular, in addition to or instead of a processor and memory such as a central processing unit, the processing circuitry 68 may include integrated circuits for processing and / or control, such as one or more processors and / or processor cores and / or FPGAs (field programmable gate arrays) and / or ASICs (application specific integrated circuits) adapted to execute instructions. The processing circuitry 70 is configured to access (e.g., write to and / or read from) the memory 72, which may include any type of volatile and / or non-volatile memory, such as cache and / or buffer memory and / or RAM (random access memory) and / or ROM (read only memory) and / or optical memory and / or EPROM (erasable programmable read only memory).

[0109] As such, the network node 16 further comprises software 74, e.g., stored within the memory 72 or in an external memory (e.g., database, storage array, network storage device) accessible by the network node 16 via an external connection. The software 74 may include instructions executable by the processing circuitry 68. The processing circuitry 68 may be configured to control and / or cause any of the methods and / or processes described herein to be performed, e.g., by the network node 16. The processor 70 corresponds to one or more processors 70 for performing the functions of the network node 16 described herein. The memory 72 is configured to store data, program software code, and / or other information described herein. In some embodiments, the software 74 may include instructions that, when executed by the processor 70 and / or the processing circuitry 68, cause the processor 70 and / or the processing circuitry 68 to perform the processes described herein in connection with the network node 16. For example, the processing circuitry 68 of the network node 16 may include a configuration unit 32 configured to perform one or more network node 16 functions described herein, e.g., with respect to multi-resource transmission with transmit power scaling and virtualization.

[0110] The communication system 10 further includes the previously mentioned WD 22. The WD 22 includes hardware 80, which may include a wireless interface 82 configured to set up and maintain a wireless connection 64 with a network node 16 serving a coverage area 18 in which the WD 22 is currently located. The wireless interface 82 may be formed as or may include, for example, one or more RF transmitters (transmitter chains / panels), one or more RF receivers (receiver chains / panels), and / or one or more RF transceivers. The wireless interface 82 may include one or more antennas 83 (e.g., one or more antenna ports).

[0111] The hardware 80 of the WD 22 further includes a processing circuit 84. The processing circuit 84 may include a processor 86 and a memory 88. In particular, in addition to or instead of a processor and memory such as a central processing unit, the processing circuit 84 may include integrated circuits for processing and / or control, such as one or more processors and / or processor cores and / or FPGAs (field programmable gate arrays) and / or ASICs (application specific integrated circuits) adapted to execute instructions. The processing circuit 86 is configured to access (e.g., write to and / or read from) the memory 88, which may include any type of volatile and / or non-volatile memory, such as cache and / or buffer memory and / or RAM (random access memory) and / or ROM (read only memory) and / or optical memory and / or EPROM (erasable programmable read only memory).

[0112] As such, the WD 22 may further include software 90, for example stored in the memory 88 of the WD 22 or in an external memory accessible by the WD 22 (e.g., a database, a storage array, a network storage device). The software 90 may include instructions executable by the processing circuitry 84. The software 90 may include a client application 92. The client application 92 may be operable to provide services to a human or non-human user via the WD 22 with the support of the host computer 24. A host application 50 running on the host computer 24 may communicate with the running client application 92 via the WD 22 and an OTT connection 52 that terminates at the host computer 24. In providing services to the user, the client application 92 may receive request data from the host application 50 and provide user data in response to the request data. The OTT connection 52 may transport both the request data and the user data. The client application 92 may interact with the user to generate user data to provide.

[0113] The processing circuitry 84 may be configured to control and / or cause any of the methods and / or processes described herein to be performed, for example, by the WD 22. The processor 86 corresponds to one or more processors 86 for performing the functions of the WD 22 described herein. The WD 22 includes a memory 88 configured to store data, program software code, and / or other information described herein. In some embodiments, the software 90 and / or the client application 92 may include instructions that, when executed by the processor 86 and / or the processing circuitry 84, cause the processor 86 and / or the processing circuitry 84 to perform the processes described herein in connection with the WD 22. For example, the processing circuitry 84 of the wireless device 22 may include a multi-resource unit 34 configured to perform one or more wireless device 22 functions described herein, such as those related to multi-resource transmission with transmit power scaling and virtualization.

[0114] In some embodiments, the internal operation of network node 16, WD 22, and host computer 24 may be as shown in FIG. 4, and independently, the surrounding network topology may be as shown in FIG.

[0115] 4, OTT connection 52 is depicted abstractly to illustrate communication between host computer 24 and wireless device 22 via network nodes 16, without explicit reference to intermediate devices and the exact routing of messages through those devices. The network infrastructure may determine the routing, which may be configured to be hidden from WD 22 or the service provider operating host computer 24, or both. While OTT connection 52 is active, the network infrastructure may further decide to dynamically change the routing (e.g., based on network load balancing considerations or reconfiguration).

[0116] The wireless connection 64 between the WD 22 and the network node 16 follows the teachings of the embodiments described throughout this disclosure. One or more various embodiments improve the performance of the OTT services provided to the WD 22 using the OTT connection 52 of which the wireless connection 64 forms the final segment. More precisely, the teachings of some of these embodiments may improve data rates, latency, and / or power consumption, thereby providing benefits such as reduced user latency, relaxed file size limitations, improved responsiveness, extended battery life, etc.

[0117] In some embodiments, measurement procedures may be provided for the purpose of monitoring data rates, delays, and other factors for which one or more embodiments may be improved. Additionally, there may be optional network functionality for reconfiguring the OTT connection 52 between the host computer 24 and the WD 22 in response to variations in the measurement results. The measurement procedures and / or network functionality for reconfiguring the OTT connection 52 may be implemented in the software 48 of the host computer 24 or the software 90 of the WD 22, or both. In an embodiment, sensors (not shown) are located in or associated with the communication devices through which the OTT connection 52 passes, and the sensors may participate in the measurement procedures by providing values ​​of the monitored quantities exemplified above, or by providing values ​​of other physical quantities from which the software 48, 90 may calculate or estimate the monitored quantities. Reconfiguration of the OTT connection 52 may include changes in message formats, retransmission settings, priority routing, etc., and the reconfiguration may have no impact on the network node 16 and may be unknown or imperceptible to the network node 16. Such procedures and functionality may be known and practiced in the art. In certain embodiments, the measurements may include proprietary WD signaling to facilitate host computer 24 measurements of throughput, propagation time, delay, etc. In some embodiments, the measurements may be implemented such that the software 48, 90 uses the OTT connection 52 to send messages, particularly empty or "dummy" messages, while monitoring propagation times, errors, etc.

[0118] Thus, in some embodiments, the host computer 24 includes processing circuitry 42 configured to provide user data and a communications interface 40 configured to forward the user data to the cellular network for transmission to the WD 22. In some embodiments, the cellular network also includes a network node 16 having a wireless interface 62. In some embodiments, the network node 16 and / or the processing circuitry 68 of the network node 16 are configured to perform the functions and / or methods described herein to prepare / initiate / maintain / support / terminate transmissions to the UE 22 and / or prepare / terminate / maintain / support / terminate reception of transmissions from the UE 22.

[0119] In some embodiments, host computer 24 includes processing circuitry 42 and a communications interface 40 configured to receive user data resulting from a transmission from WD 22 to network node 16. In some embodiments, UE 22 includes a wireless interface 82 and / or processing circuitry 84 configured and / or adapted to perform the functions and / or methods described herein to prepare / initiate / maintain / support / terminate a transmission to network node 16 and / or prepare / terminate / maintain / support / terminate reception of a transmission from network node 16.

[0120] 3 and 4 depict various "units," such as configuration unit 32 and multi-resource unit 34, as being within respective processors, it is contemplated that these units may be implemented such that portions of the units are stored in corresponding memories within the processing circuitry, or in other words, the units may be implemented in hardware within the processing circuitry or in a combination of hardware and software.

[0121] FIG. 5 is a flow chart illustrating an exemplary method implemented in a communication system, such as the communication systems of FIGS. 3 and 4, according to one embodiment. The communication system may include the host computer 24, the network node 16, and the WD 22 described with reference to FIG. 4. In a first step of the method, the host computer 24 provides user data (block S100). In an optional sub-step of the first step, the host computer 24 provides the user data by executing a host application, such as the host application 50 (block S102). In a second step, the host computer 24 initiates a transmission carrying the user data to the WD 22 (block S104). In an optional third step, the network node 16 transmits the user data carried in the host computer 24 initiated transmission to the WD 22 (block S106), in accordance with the teachings of the embodiments described throughout this disclosure. In an optional fourth step, the WD 22 executes a client application, such as the client application 92, associated with the host application 50 executed by the host computer 24 (block S108).

[0122] 6 is a flow chart illustrating an exemplary method implemented in a communication system, such as that of FIG. 3, according to one embodiment. The communication system may include the host computer 24, the network node 16, and the WD 22 described with reference to FIGS. 3 and 4. In a first step of the method, the host computer 24 provides user data (block S110). In an optional sub-step (not shown), the host computer 24 provides the user data by executing a host application, such as the host application 50. In a second step, the host computer 24 initiates a transmission carrying the user data to the WD 22 (block S112). In accordance with the teachings of the embodiments described throughout this disclosure, the transmission may pass through the network node 16. In an optional third step, the WD 22 receives the user data carried in the transmission (block S114).

[0123] FIG. 7 is a flow chart illustrating an exemplary method implemented in a communication system, such as the communication system of FIG. 3, according to one embodiment. The communication system may include the host computer 24, the network node 16, and the WD 22 described with reference to FIGS. 3 and 4. In an optional first step of the method, the WD 22 receives input data provided by the host computer 24 (block S116). In an optional sub-step of the first step, the WD 22 executes a client application 92 that provides user data in response to the received input data provided by the host computer 24 (block S118). Additionally or alternatively, in an optional second step, the WD 22 provides the user data (block S120). In an optional sub-step of the second step, the WD provides the user data by executing a client application, such as the client application 92 (block S122). In providing the user data, the executed client application 92 may further take into account user input received from a user. Regardless of the particular manner in which the user data was provided, the WD 22 initiates transmission of the user data to the host computer 24 in an optional third sub-step (block S124). In a fourth step of the method, the host computer 24 receives the user data transmitted from the WD 22 in accordance with the teachings of the embodiments described throughout this disclosure (block S126).

[0124] Figure 8 is a flow chart illustrating an exemplary method implemented in a communication system, such as that of Figure 3, according to one embodiment. The communication system may include the host computer 24, the network node 16, and the WD 22 described with reference to Figures 3 and 4. In an optional first step of the method, the network node 16 receives user data from the WD 22 (block S128), in accordance with the teachings of the embodiments described throughout this disclosure. In an optional second step, the network node 16 initiates transmission of the received user data to the host computer 24 (block S130). In a third step, the host computer 24 receives the user data carried in the transmission initiated by the network node 16 (block S132).

[0125] 9 is a flow chart of an example process in the network node 16, according to one or more embodiments of the present disclosure. One or more blocks described herein may be executed by one or more elements of the network node 16, such as one or more processing circuits 68 (including configuration unit 32), processor 70, radio interface 62 and / or communication interface 60. The network node 16 is configured to cause transmission of a configuration for a physical uplink shared channel (PUSCH) communication (block S134), as described above, the configuration configuring use of at least a first reference signal (RS) resource and a second RS resource, the first RS resource being associated with a first precoder and a first layer set, the second RS resource being associated with a second precoder and a second layer set, the first and second layer sets being configured based on a number of non-zero power antenna ports. The network node 16 is configured to receive a PUSCH communication based at least on the configuration, as described above (block S136).

[0126] According to one or more embodiments, each of the first and second RS resources includes less than N ports, where N corresponds to one of a maximum number of layers and a maximum number of RS ports that the wireless device can be configured to transmit. According to one or more embodiments, each of the first and second layer sets corresponds to a portion of the total transmit power. According to one or more embodiments, the transmit power associated with the received PUSCH is based on scaling down the transmit power by the number of RS ports in each of the first and second RS resources and splitting the scaled down transmit power evenly among at least the non-zero antenna ports to enable dynamic virtualization.

[0127] In accordance with one or more embodiments, a transmit power associated with a received PUSCH is based on scaling down the transmit power by a total number of one of the layers and ports supported by the wireless device when dynamic virtualization is not used, and dividing the scaled down transmit power evenly among at least the non-zero ports. In accordance with one or more embodiments, the dividing is based on one of a division across the non-zero ports and an equal division among all transmit ports for each of the first RS resource and the second RS resource.

[0128] 10 is a flow chart of another example process in network node 16 in accordance with one or more embodiments of the present disclosure. One or more blocks described herein may be performed by one or more elements of network node 16, such as one or more processing circuits 68 (including configuration unit 32), processor 70, radio interface 62 and / or communication interface 60. Network node 16 is configured to configure the wireless device with multiple SRS resources (block S138), as described above.

[0129] The network node 16 is configured to cause transmission of a first indication of a first precoder for use with a first antenna port signal set associated with a first SRS resource of the plurality of SRS resources, as described above (block S140).

[0130] The network node 16 is configured to cause transmission of a second indication of a second precoder for use with a second antenna port signal set associated with a second SRS resource of the plurality of SRS resources, as described above (block S142).

[0131] The network node 16 is configured to receive (S144) a transmission of a physical channel, where the first physical channel portion and the second physical channel portion are based on the first indication and the second indication to form first and second signal powers, respectively, and each antenna port signal of the first antenna port signal set is based on the number of non-zero power antenna ports in the first antenna port signal set, and each antenna port signal of the second antenna port signal set is based on the number of non-zero power antenna ports in the second antenna port signal set.

[0132] In some embodiments, the total constituent signal power of the physical channel is based on an equal or unequal division across the non-zero power antenna port signals of a first antenna port signal set, or across ports corresponding to each resource, the division being based on a controlled ratio of the first power signal and the second power signal, or on a power control parameter for independently controlling the first power signal and the second power signal.

[0133] In some embodiments, the physical channel includes a first set of transmission layers precoded with a first precoder to generate a first antenna port signal set corresponding to a first physical channel portion, and a second set of transmission layers precoded with a second precoder to generate a second antenna port signal set corresponding to a second physical channel portion, the first signal power being based at least in part on a multiplication of a power of each antenna port signal in the first antenna port signal set by the number of non-zero power antenna ports in the first antenna port signal set, and the second signal power being based at least in part on a multiplication of a power of each antenna port signal in the second antenna port signal set by the number of non-zero power antenna ports in the second antenna port signal set.

[0134] In some embodiments, the first and second sets of transmission layers are mapped to the first and second sets of DMRS ports, where the first set of DMRS ports corresponds only to the first set of transmission layers and the second set of DMRS ports corresponds only to the second set of transmission layers.

[0135] In some embodiments, the first SRS resource and the second SRS resource each include less than N ports, where N is a value corresponding to one of a maximum number of transmission layers and a maximum number of SRS ports that the wireless device can transmit.

[0136] In some embodiments, the first and second signal powers are values ​​based on dividing the first and second signal powers by N.

[0137] In some embodiments, the first and second signal powers are based on dividing the first and second signal powers by the number of first and second SRS ports, respectively, which are the number of SRS ports in the first and second SRS resources, respectively, and the first signal power is divided evenly among the antenna port signals in the first antenna port signal set and the second signal power is divided evenly among the antenna port signals in the second antenna port signal set.

[0138] According to some embodiments of this aspect, the physical channel signaling corresponds to a physical uplink shared channel.

[0139] 11 is a flow chart of an example process in the wireless device 22 according to some embodiments of the disclosure. One or more blocks described herein may be executed by one or more elements of the wireless device 22, such as one or more processing circuits 84 (including the multi-resource unit 34), the processor 86, the air interface 82, and / or the communication interface 60. The wireless device 22 is configured to receive (block S146) a configuration for physical uplink shared channel (PUSCH) communication, as described above, the configuration configuring the use of at least a first reference signal (RS) resource and a second RS resource, the first RS resource being associated with a first precoder and a first layer set, the second RS resource being associated with a second precoder and a second layer set, the first and second layer sets being configured based on a number of non-zero power antenna ports. The wireless device 22 is configured to cause the PUSCH communication based at least on the configuration, as described above (block S148).

[0140] According to one or more embodiments, each of the first and second SRS resources includes less than N ports, where N corresponds to one of a maximum number of layers and a maximum number of RS ports that the wireless device can be configured to transmit. According to one or more embodiments, each of the first and second layer sets corresponds to a portion of the total transmit power. According to one or more embodiments, the transmit power associated with the transmitted PUSCH is based on scaling down the transmit power by the number of RS ports in each of the first and second RS resources and splitting the scaled down transmit power evenly among at least the non-zero antenna ports to enable dynamic virtualization.

[0141] According to one or more embodiments, a transmit power associated with the transmitting PUSCH is based on scaling down the transmit power by the total number of one of the layers and ports supported by the wireless device when dynamic virtualization is not used, and dividing the scaled down transmit power evenly among at least the non-zero ports. According to one or more embodiments, the division is based on one of a division across the non-zero ports and an even division among all transmit ports for each of the first and second RS resources.

[0142] 12 is a flow chart of another example process in the wireless device 22 according to some embodiments of the disclosure. One or more blocks described herein may be performed by one or more elements of the wireless device 22, such as one or more processing circuits 84 (including the multi-resource unit 34), the processor 86, the air interface 82, and / or the communication interface 60. The wireless device 22 is configured to receive signaling to configure the wireless device with a plurality of SRS resources (block S150), as described above. The wireless device 22 is configured to receive a first indication of a first precoder to use for a first antenna port signal set that carries a first portion of a physical channel and is associated with a first SRS resource of the plurality of SRS resources (block S152), as described above.

[0143] The wireless device 22 is configured to receive a second indication of a second precoder for use with a second antenna port signal set carrying a second portion of the physical channel and associated with a second SRS resource of the plurality of SRS resources (block S154), as described above. The wireless device 22 is configured to adjust the first and second physical channel portions according to the first and second indications to form first and second signal powers (block S156), where each antenna port signal in the first set of antenna port signals is adjusted based on the number of non-zero power antenna ports in the first set of antenna port signals and each antenna port signal in the second set of antenna port signals is adjusted based on the number of non-zero power antenna ports in the second set of antenna port signals. The wireless device 22 is configured to transmit the physical channel (block S158).

[0144] In some embodiments, processing circuitry 84 is further configured to precode the first set of transmission layers with a first precoder to generate a first antenna port signal set corresponding to the first physical channel portion, precode the second set of transmission layers with a second precoder to generate a second antenna port signal set corresponding to the second physical channel portion, adjust the first signal power based at least in part on multiplying a power of each antenna port signal in the first antenna port signal set by the number of non-zero power antenna ports in the first antenna port signal set, and adjust the second signal power based at least in part on multiplying a power of each antenna port signal in the second antenna port signal set by the number of non-zero power antenna ports in the second antenna port signal set.

[0145] In some embodiments, processing circuitry 84 is configured to map a first and a second layer set of transmission layers to a first and a second set of DMRS ports, such that the first set of DMRS ports corresponds only to the first set of transmission layers and the second set of DMRS ports corresponds only to the second set of transmission layers.

[0146] In some embodiments, the first SRS resource and the second SRS resource each include less than N ports, where N is a value corresponding to one of a maximum number of transmission layers and a maximum number of SRS ports that the wireless device can transmit.

[0147] According to some embodiments, processing circuitry 84 is further configured to additionally adjust the first and second signal powers by dividing the first and second signal powers by N.

[0148] In some embodiments, processing circuitry 84 is further configured to additionally adjust the first and second signal powers by dividing the first and second signal powers by a first and second number of SRS ports, respectively, where the first and second numbers of SRS ports are the number of SRS ports in the first and second SRS resources, respectively; divide the adjusted first signal power evenly among the antenna port signals of the first antenna port signal set; and divide the adjusted second signal power evenly among the antenna port signals of the second antenna port signal set.

[0149] According to some embodiments of this aspect, the physical channel signaling corresponds to a physical uplink shared channel.

[0150] After describing the general process flow of the disclosed configurations and providing example hardware and software configurations for implementing the disclosed processes and functionality, the following sections provide details and examples of multi-resource transmission configurations, e.g., with transmit power scaling and virtualization.

[0151] Some embodiments provide, for example, multi-resource transmission with transmit power scaling and virtualization. One or more functions of the wireless device 22 described below may be performed by one or more of the processing circuitry 84, the processor 86, the multi-resource unit 34, the air interface 82, the antenna 83, etc. One or more functions of the network node 16 described below may be performed by one or more of the processing circuitry 68, the processor 70, the configuration unit 32, etc.

[0152] As mentioned above, 3GPP Rel-15 NR supports codebook-based UL MIMO operation where the DCI can select a single SRS resource and precoder to use for transmitting one or more PUSCH layers. 3GPP Rel-15 NR UL MIMO also supports non-codebook-based operation where the SRI indicates one or more single-port SRS resources to use for transmitting the corresponding PUSCH layer or layers. As of 3GPP Rel-17, NR UL MIMO does not support codebook-based or non-codebook-based operation to transmit PUSCH layers using multiple multi-port SRS resources.

[0153] Supporting multi-SRS resource, multi-SRS port transmission has various advantages. If each SRS resource has an associated separate PUSCH layer, then using multiple SRS resources to transmit simultaneously increases the number of layers transmitted. Compared to the non-codebook based operation of 3GPP Rel-15 (which also increases the number of layers), the use of multi-port SRS resources allows the network node 16 to select a precoder for each resource that can optimize the received signal at the network node 16, improving fast fading tracking and reducing the complexity of the wireless device 22 over the approach based on wireless device reciprocity assumed in the non-codebook based scheme. Compared to the codebook based operation of Rel-15, N port N SRS ports srs The SRS resource transmissions are N srs ×N port=N antenna elements, where elements within a panel have the same antenna pattern, but each panel has a different antenna pattern and / or aiming. When array elements are grouped into panels, elements within a panel will have similar received power at the TRP, while elements in different panels will have different power. These different received power levels may make it beneficial to assign common parameters to the transmissions from the panels for link adaptation purposes. For example, it may be beneficial to adjust the power per panel to improve the tradeoff between total transmit power and SINR of the layers of each panel, improving UL throughput. Similarly, using different modulations and / or different code rates per panel may allow for a closer match of the channel capacity of the layers of each panel.

[0154] Some embodiments of multi-SRS resource based multi-SRS port transmission are described with reference to the exemplary block diagram shown in FIG.

[0155] Unlike NR in 3GPP Rel-15, two different precoders W1 and W2 are used when transmitting a single physical channel. In this example, a single codeword is transmitted and is mapped to two different sets of layers, or "layer sets", identified by symbol vectors s1 and s2, respectively. The first layer set, corresponding to s1, has L layers (hence rank L), and the second layer set, corresponding to s2, has M layers (hence rank M). Thus, the precoders W1 and W2 are matrices with J rows and L columns and K rows and M columns, respectively. Each layer in each layer set is identified with a DMRS port and multiplexed with a DMRS specific to that layer. The first and second precoders are, respectively, W1s1=x1 and W2s2=x2 The antenna port signal vectors x1 and x2 are generated according to

[0156] A total of J+K=N antennas are shown. The first set of antenna port signals includes J antenna port signals X1...X Jand the second set of antenna port signals has K antenna port signals X J+1 X J+K Each antenna port signal corresponds to one of the J+K antennas. Each of the J+K antennas has its own unique SRS signal ({SRS1,...,SRS J+K}) is multiplexed onto the same antenna as the corresponding antenna port signal, thereby enabling channel estimation of the signal carried on the antenna through measurement of the SRS signal.

[0157] The power transmitted through each antenna is multiplied by a multiplier C1···C for the first set of antennas. J and the multiplier C of the second set of antennas adjusted by the antenna port signal J+1 ···C J+K and the antenna port signals. In this manner, the total transmit power of all layers in each layer set can be controlled independently between layer sets. Thus, the transmit power of each layer set is equal to the power of each antenna port signal set, and thus, embodiments herein refer interchangeably to the power of a layer set and the power of its corresponding antenna port signal set. In some embodiments, each set of antenna port signals is represented as a single value, i.e., {C1...C J}=C'1 and {C J+1 ,···,C J+K}=C'2. If the average powers of the antenna ports received by the network for the SRS resources (and thus the corresponding sets of antenna signals) are similar, but the average powers differ between the sets of SRS resources and antenna port signals, it may be sufficient to use only one scale factor value per set. This may occur, for example, when antennas corresponding to SRS resources have similar antenna patterns within the SRS resources, but different patterns between the SRS resources, i.e., when wireless device 22 panels (e.g., antenna panels) are used.

[0158] The SRS signals may be identified by SRS ports and contained within the SRS resources. Thus, the first and second SRS resources may be transmitted on antenna sets 1 and 2 in FIG. 13. A single SRS resource containing all J+K SRS signals may also be used. However, since the NR precoder is designed to apply to the entire SRS resource, due in part to the requirement that the UE transmits the SRS ports simultaneously when precoding, only one precoder may be used if that design principle is maintained. Furthermore, since the SRS resources are generally designed to allow the UE to use different antenna patterns across resources, a multi-SRS resource design may better support wireless devices 22 equipped with such antenna systems. Thus, in the illustrated embodiment, the first set of SRS signals {SRS1,...,SRS J} is in the first SRS resource and the second set of SRS signals {SRS J+1 ,···,SRS J+K} is in the second SRS resource.

[0159] These two SRS resources can be used for a single PUSCH transmission, and each includes J and K ports. First and second precoders W1 and W2 can be used for transmission according to the first and second SRS resources. A maximum of J and K layers corresponding to the first and second layer sets can be transmitted according to the first and second SRS resources. A codebook supporting J+K ports that combines the ports of the two SRS resources, or a codebook that combines the ports of a single SRS resource that includes J+K SRS ports, can be used. In such a case, the power scaling of the PUSCH transmission can use the Rel-15 based design described above, in which the PUSCH power is scaled according to the number of non-zero power antenna ports used for the PUSCH transmission divided by the maximum number of SRS ports supported by the wireless device 22. However, in a design in which a J-port codebook is used for the first SRS resource and a K-port codebook is used for the second SRS resource, there are two portions of antenna ports used for PUSCH transmission, and it is necessary to determine how to allocate power within and between layer sets corresponding to each SRS resource.

[0160] Thus, in some embodiments, for each SRS resource, the power of each antenna signal set for the SRS resource is scaled according to the number of non-zero power antenna ports in the antenna port signal set used for that SRS resource. Then, all antenna port signal sets are scaled by a factor of the inverse of the maximum number of layers that can be simultaneously transmitted by the wireless device 22 during a multi-SRS resource transmission. Finally, the power is divided equally among the non-zero power antenna port signals. The maximum number of simultaneously transmitted layers is used here because the maximum number of SRS ports supported by the wireless device 22 may not increase with multi-SRS resource transmission, and therefore increasing the number of SRS ports beyond the four ports supported in Rel-17 NR may not be designed to support multi-SRS resource transmission. In this embodiment, the scaling does not exceed a value of 1, which ensures that the maximum power of the wireless device 22 does not exceed the allocated power while eliminating the need to design a codebook or SRS resource that supports (J+K)>4 ports. It is also possible that the maximum number of transmission layers is less than the maximum supported number of antenna ports used for PUSCH transmission of the wireless device 22. Thus, in one embodiment, the PUSCH power is divided by the maximum number of simultaneous antenna ports supported by the wireless device 22 for PUSCH transmission.

[0161] The DMRS port may be transmitted at the same power as the PUSCH layer or at a predetermined power offset from the PUSCH layer, such that the network node 16 can estimate the SINR of the PUSCH layer from DMRS measurements. Thus, in these embodiments, each layer of each layer set is mapped to a corresponding DMRS port by multiplexing the DMRS signal together with the layer, as shown in Figure 13, and the mapping sets the power of the DMRS to have the same power as the PUSCH layer or be a predetermined power offset from the DMRS.

[0162] In some embodiments, a single DMRS port is mapped to layers of two (or more) different layer sets, in which case the total power of the DMRS port is equal to the sum of the output power used for the corresponding layer of the first layer set and the output power used for the corresponding layer of the second layer set (with a possible additional boost DMRS power offset for each layer set).

[0163] Finally, the antenna port signal set of the PUSCH is transmitted on the corresponding antenna.

[0164] One or more of the above embodiments can be described in a general embodiment as transmitting a PUSCH according to two or more SRS resources, where a precoder can be used for each resource, and where each layer set corresponding to the resource has a transmit power determined according to the number of non-zero power antenna ports, with each layer set having a corresponding portion of the total transmit power.

[0165] In particular, a method is disclosed for transmitting a physical channel at a wireless device 22, where the wireless device 22 receives signaling configuring the wireless device 22 with a plurality of SRS resources, where each SRS resource includes less than N ports, where N is a value indicated by the wireless device 22 and identifies one of a maximum number of layers and a maximum number of SRS ports over which the wireless device 22 can transmit. The wireless device 22 also receives an indication of a first and a second one of the SRS resources, where the first and the second SRS resources include J and K SRS ports, respectively, where J+K≦N. The wireless device 22 distributes modulation symbols carrying a set of encoded information bits to the first and second layer sets. The wireless device 22 further multiplexes a demodulation reference signal (DMRS) identified by a DMRS port of the physical channel with each layer of the first and second layer sets, where each DMRS port is specific to a corresponding layer. If J>1, the wireless device 22 receives an indication of a first precoder to be used on an antenna port carrying a physical channel, the first precoder corresponding to a first SRS resource, and precodes a first layer set of the physical channel to form a first antenna port signal set.

[0166] If K>1, the wireless device 22 receives an indication of a second precoder corresponding to a second SRS resource used at an antenna port transmitting a physical channel, and precodes a second layer set of the physical channel to form a second antenna port signal set. The wireless device 22 multiplies the power of each antenna port signal in the first antenna port signal set by the number of non-zero power antenna ports in the first antenna port signal set, thereby forming a first portion of the transmission power, and multiplies the power of each antenna port signal in the second antenna port signal set by the number of non-zero power antenna ports in the second antenna port signal set, thereby forming a second portion of the transmission power. The wireless device 22 further sets the transmission power of the first antenna port signal set and the second antenna port signal set, respectively, according to the first and second portions of the transmission power. Finally, the wireless device 22 transmits the antenna port signal set on the corresponding antenna.

[0167] In some embodiments, the wireless device 22 may support multi-SRS transmissions when the number of SRS ports used simultaneously, Ntotal, is greater than the maximum number of layers supported by the wireless device 22. Such a wireless device 22 may reduce baseband processing complexity by lowering the maximum PUSCH data rate. To minimize the complexity of the power amplifiers of the wireless device 22, the maximum power of each amplifier may be supported / provided / configured equally, in which case the total power of all amplifiers is the maximum power transmitted by the wireless device 22. For UL MIMO transmissions, the number of SRS ports may be increased and the SRS resources may be defined using a corresponding codebook. In such a case, the wireless device 22 may support both SRS resources with an increased number of ports and multiple SRS resource-based transmissions using J>1 and K>1 SRS ports.

[0168] Therefore, in a similar embodiment, for each SRS resource, the power of each antenna port signal set of the resource is multiplied again by the number of non-zero power antenna ports within the antenna port signal set. However, all layers of all resources are scaled by a factor that is the reciprocal of the maximum number of SRS ports that can be used simultaneously for transmitting a physical channel in the UE during multi-SRS resource transmission.

[0169] In the radio device 22 having multiple transmit chains, it is beneficial to virtualize those transmit chains so that they appear as a single antenna when received by the network node 16. By transmitting the same information with multiple virtualized antennas, the power of the antennas is combined and the transmission is received with a higher SNR. This enables the use of a low-power amplifier in the radio device 22 or the conservation of power of the radio device 22. The use of this virtualization may reduce the number of SRS ports available for an SRS resource, potentially resulting in a single-port SRS resource. This is the motivation for considering embodiments where J < Ntotal or K < Ntotal, where Ntotal is the total number of Tx chains of the radio device 22, and also serves as the motivation for considering the case where J = 1 or K = 1.

[0170] When a single-port SRS resource is used in multi-SRS resource transmission, since there is no port to combine with the codebook, the UL MIMO codebook may not be necessary. Therefore, instead of a precoder, a default precoder with a single element having a value of 1 can be used, or a single SRS port can be set the same as a DMRS port. Further, in some embodiments that use a codebook to generate layers corresponding to an SRS resource, an indication of the precoder for that SRS resource is received only if the number of SRS ports within the resource is greater than 1.

[0171] When virtualizing antenna ports to increase the power of a layer, it may not be desirable to lower the transmit power when applying MIMO power scaling. One way to mitigate this is to multiply the power of the antenna port signal set by the number of non-zero power antenna ports in the antenna port signal set and divide that number by the number of ports in the SRS resource corresponding to the layer. This is similar to the uplink full power UL MIMO Mode 2 in Rel-16 and may be one way to extend Mode 2 in Rel-17 to support multi-SRS resource transmission. In an exemplary embodiment, the wireless device 22 has eight Tx chains and therefore up to eight layers, and the first SRS resource with J=4 ports may use a non-zero antenna port precoder for each of the four layers, and the second SRS resource with K=1 port may use a default precoder with one non-zero antenna port for one layer. In one embodiment, the scaling factor for the four layers of the first SRS resource may be 4 / 8 and the scaling factor for the layer of the second SRS resource may be 1 / 8. Because the ports of the second SRS resource are virtualized to reach four times the total power available in the array, or 4 / 8 (assuming all eight Tx chains support the same power), scaling by 1 / 8 reduces the power by a factor of four. If instead the scaling was based on the total number of SRS ports in the SRS resource being used, the scale factor for the four layers of the first SRS resource would be 4 / (4+1)=4 / 5, and the layer of the second SRS resource would also be 1 / 5. In this case, a problem could arise where the power of the first SRS resource across all layers would be 4 / 5 of the total, even though there are only half the number of Tx chains, so the actual power that can be transmitted does not reach 4 / 5 of the total.

[0172] Another approach is to limit the maximum power per SRS resource depending on the contribution of the Tx chain of the wireless device 22 to the total power. In one embodiment, the wireless device 22 has a maximum number of layers that can be transmitted using multiple SRS resources. The power scaling factor is the number of non-zero power antenna ports in the antenna port signal set / (Ni×M), where Ni is the number of ports in the SRS resource i used for transmission. In the illustrated configuration, the first SRS resource has a scaling of 4 / (4×2)=4 / 8 for the corresponding four antenna port signals and a scaling of 1 / (1×2)=1 / 2 for the corresponding antenna port signal. Thus, the total scaling of the transmission power is 1 / 2+1 / 2=1, and the full power of the wireless device 22 is used and divided evenly between the SRS resources (carried by different panels).

[0173] In another embodiment, the wireless device 22 may have different numbers of Tx chains in different panels (e.g., antenna panels). In such an embodiment, it may be useful to perform power scaling to account for the variation between panels. Thus, the power scaling is (number of non-zero power ports used to transmit the set of antenna port signals) / (Ni×Ntotal / Nmax,i), where Ni is the number of ports of SRS resource i used for transmission, Nmax,i is the maximum number of ports that can be supported in the group of SRS resources that includes SRS resource i, and Ntotal is the sum of Nmax,i of the SRS resources used. In an exemplary embodiment with two panels having four and two Tx chains, respectively, J=4 and K=2 SRS resources are selected. Rank-2 transmission is used for the first SRS resource, and four non-zero power antennas are used for each layer, so the scale factor for the first resource is (4+4) / (4×6 / 4)=8 / 6. The power is divided equally among the non-zero power antenna ports corresponding to the SRS resources and further scaled by 1 / 4, resulting in a total power scaling factor for the layer of the first SRS resource of (8 / 6) / 4=2 / 3. For the second SRS resource, rank-2 transmission with two non-zero power ports per layer is used, resulting in a scale factor of (2+2) / (2×6 / 2)=4 / 6. The equal power division among the non-zero power antenna ports results in a factor of 1 / 2, resulting in a total power scaling factor for the layer of the second SRS resource of (4 / 6) / 2=1 / 3. Thus, the total transmitted power scaling is 2 / 3+1 / 3=1, and the full power of the array is used and divided equally among the SRS resources (transmitted by different panels).

[0174] A first modification to the general embodiment described above may be described as scaling down the power by the number of SRS ports in each SRS resource to allow for dynamic virtualization, or by the total number of layers or ports supported by wireless device 22 in a multi-SRS transmission if dynamic virtualization is not used, and then dividing the power evenly among the non-zero power antenna ports. In the general embodiment step of setting the transmit power, wireless device 22 further divides a first portion of the transmit power by an integer value P1 and divides the divided power evenly among the non-zero power antenna port signals, where P1 is a value J equal to one of the maximum number of SRS ports that wireless device 22 can use when transmitting according to the multi-SRS resource and the maximum number of layers that wireless device 22 can transmit when transmitting according to the multi-SRS resource. The wireless device 22 also divides a second portion of the transmission power by an integer value P2 and divides the divided power evenly among the non-zero power antenna port signals, where P2 is a value K equal to one of the maximum number of SRS ports that the wireless device 22 can use when transmitting according to the multiple SRS resources and the maximum number of layers that the wireless device 22 can transmit when transmitting according to the multiple SRS resources.

[0175] A second modification to the general embodiment described above includes splitting the power among the non-zero power antenna ports for each SRS resource, rather than splitting the power evenly among all transmit ports. More specifically, in addition to or instead of the second modification to the general embodiment, the wireless device 22 further splits a first portion of the transmit power by P1 and splits the split power evenly among the antenna port signals of a first set of non-zero power antenna port signals. The wireless device 22 further splits a second portion of the transmit power by P2 and splits the split power evenly among the antenna port signals of a second set of non-zero power antenna port signals.

[0176] As mentioned above, different received power levels make it beneficial to transmit at different powers for link adaptation purposes for different panels. One way to set different powers between panels is to use different power control parameters for each panel. The power control parameters may include parameters defined in 3GPP standards, such as, for example, section 7.1.1 of 3GPP TS38.213 rev.16.0.0. b,f,c (j) and P 0_PUSCH,f,c Using so-called "open loop" power control parameters such as , the power per antenna port signal set, or equivalently per layer set, can be set to a fixed level or determined based on path loss estimates from downlink measurements.

[0177] Furthermore, the closed loop power control of each panel adjusts the power of the antenna port signal set or equivalently the layer set to the PUSCH power control adjustment state f b,f,c (i,l), where the index of the antenna port signal set or layer set is associated with the power control adjustment state index l. Separate application of open-loop and / or closed-loop power control to different antenna port signal sets or layer sets allows for tens of dB of power difference between the sets ("dynamic range"), providing a very flexible power control mechanism. The SRI-based power control in 3GPP NR Rel-15 also supports the use of different power control parameters or power control loops, but this is a different mechanism because different parameters or sets are used at different times and there is no need to share power between power control loops.

[0178] As an alternative to setting different powers between panels, power offsets can be defined between layer sets, or equivalently between antenna port signal sets. Using such relative power offsets between sets allows the power to be set without the large dynamic range seen in embodiments using different power control parameters for each set. In general, a small number of relative power offsets provides good performance and allows the power offset signaling to have one or two bits when two layer sets are used. For example, the power of the first antenna port signal set or layer set is kept constant (or equivalently scaled by a factor of 1), and a power scale factor from the set of {√2, 1 / √2} is indicated by one bit for the second antenna port signal set or layer set, making the second layer set 3 dB higher or lower than the first antenna port signal set or layer set. As another example, the power offset value can be taken from {1, √2, 1 / √2, 2}, with the second set being 0, -3, +3 or 6 dB higher than the first set. Similar embodiments can use other power offset values, which can be different numbers, including values ​​that are not powers of two (different from the values ​​of 2 and 4 in the example set described herein).

[0179] Thus, in some embodiments of the general embodiment, the power can be split unequally between the layer sets according to a controlled ratio or power control parameter. More specifically, in this embodiment, the wireless device 22 further receives an indication of first and second power levels for transmitting the first and second sets of antenna port signals, the indication including one of: a) first and second sets of power control parameters corresponding to the first and second SRS resources, respectively; and b) a relative power ratio between the first and second sets of antenna port signals. The wireless device 22 adjusts the first and second portions of the transmit power according to the first and second power levels.

[0180] If each precoder is applied only to the Tx chains within each panel, and each panel transmits a layer carrying different coded bits than the other panels, it may not be necessary to define the relative phase between panels since the layers will not be coherently combined due to their different information content. In such an embodiment, each layer is mapped to one DMRS port only once, so there is a one-to-one mapping of layers to DMRS ports across the layer set. One way to do this is to use the DMRS port {p ~ 0,···p ~ ν-1} order, proceeding to the second layer immediately after the first, and so on. For example, if there are two layers in the first set and three layers in the second set, the layers are in the order {p ~ 0=p ~0 0,p ~ 1=p ~0 1,p ~ 2=p ~1 0,p ~ 3=p ~1 1,p ~ 4=p ~1 2}, where {p ~0 0,p ~0 1} are the two DMRS ports corresponding to the layers in the first layer set, and {p ~1 0,p ~1 1,p ~1 2} are the three DMRS ports corresponding to the layers in the second layer set. More generally, in FIG. 13, the layers corresponding to the SRS resources are {p ~ 0=p ~0 0,p ~ 1=p ~0 1,...,p ~ L-1 =p ~0 L-1}, and the layer corresponding to the SRS resource is {p ~ L =p ~1 0,p ~ L+1 =p ~1 1,...,p ~L+M-1 =p ~1 L+M-1}.

[0181] Thus, in some embodiments of the general embodiment, in the step of mapping each layer of the first layer set and the second layer set to a DMRS port of the physical channel, wireless device 22 further maps each layer of the first layer set and the second layer set to a unique DMRS port of the physical channel, such that each DMRS port corresponds to a single layer of the layers of the first layer set and the second layer set.

[0182] In some embodiments in which DMRS ports are mapped contiguously across SRS resources, a layer of a first layer set with index m is multiplexed with a DMRS port with index m, and a layer of a second layer set with index m is multiplexed with a DMRS port with index m+L, where L is the number of layers in the first layer set.

[0183] If the wireless device 22 transmits a layer on only one panel, the power of the other panels may not naturally contribute to the power of that layer, which at least partially prompted consideration of implementations in which the wireless device 22 can transmit the same layer on multiple panels. Coherently combining transmissions from the panels requires control of the relative phase, which may require an extension of the Rel-17 NR UL MIMO codebook. Such a design may be less desirable for a multi-SRS resource-based design, since precoding, i.e., control of the relative phase of the Tx chains, may be performed by applying a precoder within a single SRS resource. Furthermore, a multi-panel implementation may be less likely to support control of the relative phase between all Tx chains than a single-panel implementation. Thus, mechanisms to support non-coherent combining of layers are particularly important in a multi-SRS resource-based design.

[0184] If two layers, each from a different panel, are transmitted using the same DMRS port, the power from the panels may be combined. If there is some control over the relative phase, for example, if a precoder that combines the layers to a DMRS port is not specified, it can be assumed that the relative phase is set by the implementation of wireless device 22. Furthermore, wireless device 22 may be specified as not being expected to maintain the relative phase of layers associated with a multi-SRS resource.

[0185] UL MIMO antenna systems tend to be designed such that layers transmitted with the same power have similar SINR distributions, i.e., some layers tend to be more powerful than others, but no layer is generally more powerful than all others for all directions of the MIMO device and all precoders used by the wireless device 22. Because there is no general ordering of the power of the MIMO layers, it may not be necessary to select multiple combinations of the same number of layers for a DMRS port.

[0186] Therefore, one way to non-coherently combine layers of different panels is to map the first layer of every layer set to the first DMRS port, the second layer of every layer set to the second DMRS port, etc. For example, as shown in FIG. 14, if two layers are in the first layer set and are mapped to both the first SRS resource and the second SRS resource, and one layer is in the second layer set and is mapped to the second SRS resource, then the layers can be grouped as {p ~ 0=p ~0 0,p ~ 1=p ~0 1,p ~ 0=p ~1 0,p ~ 1=p ~1 1,p ~ 2=p ~1 2}, where {p ~ 0,p ~ 1,p ~2} are the three unique DMRS ports associated with the three layers in the first and second layer sets. ~0 0,p ~0 1} indicates that the first two layers are mapped to the first SRS resource and precoded by the first precoder. ~1 0,p ~1 1,p ~1 2} indicates that all three layers are mapped to the second SRS resource and precoded by the second precoder.

[0187] In an embodiment such as that shown in FIG. 14, all layers of the first layer set are mapped to two SRS resources, and layers of the second layer set are mapped to only one SRS resource, e.g., the second SRS resource. ~ 0=p ~0 0,p ~ 1=p ~0 1,...,p ~ L-1 =p ~0 L-1 ,p ~ 0=p ~1 0,p ~ 1=p ~1 1,...,p ~ L-1 =p ~1 L-1 ,p ~ L =p ~1 L ,p ~ L+1 =p ~1 L+1 ,···,p ~ L+1 =p ~1 L+M+1} can be expressed as:

[0188] Thus, in some embodiments of the general embodiment, precoding at least the second layer set includes precoding the second layer set together with one or more layers of the first layer set to form a second antenna port signal set.

[0189] As mentioned above, a multi-SRS scheme that controls the relative phase of the layers transmitted in the two precoders can be designed as described herein. If additional gain from coherent combining is desired and possible in the implementation of the wireless device 22, such a mechanism can be supported by setting the relative phase of elements in the precoders that transmit the same layer. Since the same layer is present in antennas corresponding to different SRS resources (e.g., resources in different panels), when the correct relative phase of the elements in the precoders is selected, the signals can be constructively combined in the channel. This additional information can be included in the indication of the first and second precoders.

[0190] Thus, in an embodiment in which the first layer set and the second layer set are jointly precoded, the wireless device 22 also adjusts at least one of the relative phase and the relative gain between elements of the first precoder and elements of the second precoder, where the elements of the first precoder and the elements of the second precoder correspond to layers of the first layer set.

[0191] As mentioned above, it may be desirable to transmit on only one Tx chain in a panel, in which case there is no need to signal a precoder to the wireless device 22 since the wireless device 22 can transmit layers directly on the antenna ports without modifying the phase of the layers transmitted on the antenna ports with respect to the other antenna ports.

[0192] Thus, in some embodiments of the general embodiment, if J=1, wireless device 22 precodes one layer of a first layer set according to a scalar precoder value of 1 to form a first antenna port signal set, and if K=1, wireless device 22 precodes one layer of a second layer set according to a scalar precoder value of 1 to form a second antenna port signal set.

[0193] Depending on the channel conditions, an antenna port of an SRS resource may be received by network node 16 at a much lower SNR than the antenna ports of other SRS resources, such as when one panel is blocked by an object near the panel. In such cases, it may be beneficial for wireless device 22 to transmit only the layer set of SRS resources that are received at a good SNR level. Thus, in some embodiments, only one SRS resource is indicated and only the layers associated with that SRS resource are transmitted.

[0194] In some embodiments of the general embodiment, the wireless device 22 receives an indication of a single SRS resource of the SRS resources, each of which includes J SRS ports, where J≦N. The wireless device 22 distributes modulation symbols carrying a set of encoded information bits to the single second layer set. The wireless device 22 further multiplexes a demodulation reference signal (DMRS) identified by a DMRS port of the physical channel with each layer of the single layer set, each DMRS port being specific to a corresponding layer. If J>1, the wireless device 22 transmits the physical channel and receives an indication of a first precoder to be used at an antenna port corresponding to the single SRS resource, and precodes the single layer set to form a single antenna port signal set. The wireless device 22 multiplies the power of each antenna port signal in the single antenna port signal set by the number of non-zero power antenna ports in the single antenna port signal set, thereby forming a first portion of the transmit power. The wireless device 22 sets the transmit power of the single antenna port signal set according to the first portion of the transmit power. Finally, the wireless device 22 transmits a single antenna port signal set on a corresponding antenna.

[0195] The SRS resources may be configured in one SRS resource set or multiple SRS resource sets. The advantage of configuring in one SRS resource set is that the wireless device 22 can be expected to transmit different SRS resources using different antenna patterns, allowing the network to have some control over the direction in which the wireless device 22 transmits. On the other hand, different SRS resource sets can be triggered independently, allowing different power control settings. Therefore, from a power control or triggering perspective, it is beneficial to configure the SRS resources used for multi-SRS transmissions in different SRS resource sets. Thus, in one embodiment, the wireless device 22 is configured with the SRS resources used for multi-SRS transmissions in different SRS resource sets.

[0196] In some embodiments of the general embodiment, the first and second SRS resources are configured in first and second SRS resource sets, respectively.

[0197] CW to SRS resource / resource set mapping: When SRS resources experience different channel conditions or power is unequally divided among layer sets according to the embodiments herein, the capacity of different SRS resource layer sets may be different. In such cases, it is beneficial to adapt the MCS of the information carried in each layer set separately. This can be achieved by carrying codewords in different layer sets and setting the MCS of different codewords according to the SINR of the layer set.

[0198] Since the SINRs of different layer sets are often different, but the average SINRs of layers within each layer are similar, it may be effective to map a codeword to only one layer set. If a codeword is mapped to layers with significantly different SINRs, the MCS may not be well adapted to all layers. Therefore, in some embodiments, a first and a second codeword are mapped to a first and a second layer set, respectively.

[0199] FIG. 15 illustrates an example where multiple codewords may be used in a multi-SRS resource transmission. The first codeword is mapped to layers 1 through L of the first layer set, and the second codeword is mapped to layers 1 through M of the second layer set. As with other embodiments, each layer is assigned a separate DMRS, so that layers 1 through L of the first codeword are multiplexed with DMRSs 1 through L, and layers 1 through M of the second codeword are multiplexed with DMRSs L+1 through L+M. The first and second layer sets are precoded with first and second precoders and then multiplied to adjust the power per layer set, as with other embodiments. Additionally, some embodiments described herein provide the ability to adjust the power or transmit with fewer layers in a layer set, thereby increasing the power available to the layers and allowing the SNR to be adjusted per layer set, which can be effectively combined with the ability of this embodiment to adjust the MCS to match the SNR.

[0200] Thus, in some embodiments, wireless device 22 encodes the first and second sets of information bits according to first and second modulation and coding states (MCSs), respectively, to generate first and second sets of coded information bits, wireless device 22 distributes modulation symbols carrying the sets of coded information bits to the first and second layer sets, distributes the first set of coded information bits to the first layer set, and distributes the second set of coded information bits to the second layer set.

[0201] Some embodiments (Transmitting the PUSCH according to two or more SRS resources, where a TPMI can be used for each SRS resource, each layer set corresponding to the SRS resource has a transmit power determined according to a number of non-zero power antenna ports, and each layer set has a corresponding portion of the total transmit power.) The method of transmitting a physical channel in the wireless device 22 includes: a. receiving signaling configuring a wireless device 22 with a plurality of SRS resources, each SRS resource including less than N ports, where N is a value indicated by the wireless device 22, and identifying one of a maximum number of layers and a maximum number of SRS ports over which the wireless device 22 can transmit; b. receiving an indication of first and second SRS resources of an SRS resource, the first and second SRS resources respectively including J and K SRS ports, where J+K≦N; c. distributing modulation symbols carrying the set of coded information bits to the first and second layer sets; d. multiplexing a demodulation reference signal (DMRS) identified by a DMRS port of the physical channel with each layer of the first and second layer sets, where each DMRS port is specific to a corresponding layer; if eJ>1, receive an indication of a first precoder to be used on an antenna port carrying a physical channel and corresponding to a first SRS resource, and precode a first layer set to form a first antenna port signal set; if fK>1, receive an indication of a second precoder to be used on an antenna port that transmits a physical channel and corresponds to a second SRS resource, and precode at least a second layer set using the second precoder to form a second antenna port signal set; g. multiplying the power of each antenna port signal in the first antenna port signal set by the number of non-zero power antenna ports in the first antenna port signal set, thereby forming a first portion of the transmit power; h. multiplying the power of each antenna port signal in the second antenna port signal set by the number of antenna ports with non-zero power in the second antenna port signals, thereby forming a second portion of the transmission power; i. setting transmit powers of a first and a second set of antenna port signals according to the first and second portions of the transmit powers, respectively; j. transmitting the set of antenna port signals on a corresponding antenna; Contains one or more of the following:

[0202] 2. (The power is scaled down by the number of SRS ports for each SRS resource to allow for dynamic virtualization, or by the total number of layers or ports supported by the wireless device 22 in a multi-SRS transmission if dynamic virtualization is not used, and then divided evenly among the non-zero antenna ports.) The method of 1, wherein the step of setting the transmit power further comprises: a. Divide a first portion of the transmit power by an integer value P1, and divide the divided power evenly among the non-zero power antenna port signals, where: i. P1 is equal to one of the following: ii. J, iii. the maximum number of SRS ports that the wireless device 22 may use when transmitting according to the multiple SRS resources; and iv. the maximum number of layers that the wireless device 22 may transmit when transmitting according to multiple SRS resources; and v. Maximum number of simultaneous antenna ports supported for PUSCH transmission b. Dividing a second portion of the transmit power by an integer value P2 and dividing the divided power evenly among the non-zero power antenna port signals; i. P2 is equal to one of the following: ii. K, iii. the maximum number of SRS ports that the wireless device 22 may use when transmitting according to the multiple SRS resources; and iv. the maximum number of layers that the wireless device 22 may transmit when transmitting according to multiple SRS resources; and v. Maximum number of simultaneous antenna ports supported for PUSCH transmission Contains one or more of the following:

[0203] 3. (Power is divided among the non-zero antenna ports for each SRS resource, rather than being divided equally among all transmit ports.) The method of 2, further comprising: a. Dividing a first portion of the transmit power by P1 and dividing the divided power equally among the non-zero power antenna port signals of the first set of antenna port signals; and b. Dividing a second portion of the transmit power by P2 and dividing the divided power evenly among the non-zero power antenna port signals in the second set of antenna port signals; Contains one or more of the following:

[0204] 4. Any of the methods 1 to 3 (wherein the transmission power may be divided unevenly among the layer sets by a controlled ratio or power control parameter), further comprising: a. receiving an indication of a first power level and a second power level for transmitting a first set of antenna port signals and a second set of antenna port signals, the indication comprising: i. a first set and a second set of power control parameters corresponding to the first SRS resource and the second SRS resource, respectively; and ii. one of a relative power ratio between the first set of antenna port signals and the second set of antenna port signals; b. adjusting the first and second portions of the transmit power according to the first and second power levels; Contains one or more of the following:

[0205] 5. (Transmit chains of different SRS resources transmit independently.) In any one of the methods 1 to 4, the step of mapping each precoded layer of the first set of precoded layers and the second set of precoded layers to a DMRS port of a physical channel further includes: a. mapping each precoded layer of the first set and the second set of precoded layers to a unique DMRS port of the physical channel, such that each DMRS port corresponds to a single precoded layer of the first set and the second set of precoded layers; Contains one or more of the following:

[0206] 6. (Full power may be supported by transmitting layers on both panels, possibly in a non-coherent manner.) Any of the methods of 1 to 4, wherein precoding at least the second layer set using a second precoder to form a second antenna port signal set includes: a. precoding a second layer set together with one or more layers of the first layer set to form a second antenna port signal set; This includes one or more of the following:

[0207] 7. (Multiple SRS resource transmissions may be co-phased across different antenna groups / panels.) The method of 6, further comprising: a. Adjusting at least one of a relative phase and a relative gain between a first precoder element and a second precoder element, the first precoder element and the second precoder element corresponding to layers of a first layer set.

[0208] 8. (Multiple SRS resource transmission can use the SRS resource of a single port.) Any of the methods 1 to 7, further comprising: If aJ=1, precode one layer of the first layer set according to a scalar precoder with a value of 1 to form a first antenna port signal set. If bK=1, precode one layer of the second layer set according to a scalar precoder with a value of 1 to form a second antenna port signal set. This includes one or more of the following:

[0209] 9. (Single SRS resource transmission case) Any of the methods 1 to 8 may further include: a. Receive an indication of a single SRS resource of an SRS resource, the single SRS resource including each of J SRS ports, where J≦N; b. distributing modulation symbols carrying the set of coded information bits onto a single second layer set; c. multiplexing a demodulation reference signal (DMRS) identified by a DMRS port of a physical channel together with each layer of a single layer set, each DMRS port being specific to its corresponding layer; If dJ>1, receive an indication of a first precoder to be used on an antenna port that transmits a physical channel and corresponds to a first SRS resource, and precode the single layer set to form a single antenna port signal set; e. multiplying the power of each antenna port signal in the single-antenna port signal set by the number of non-zero power antenna ports in the single-antenna port signal set, thereby forming a first portion of the transmission power; f. setting the transmission power of the single antenna port signal set according to the first portion of the transmission power; g. Transmitting a single antenna port signal set on a corresponding antenna; Contains one or more of the following:

[0210] 10. (Layers are mapped contiguously across SRS resources.) Any of the methods of 1 to 9, further comprising: a. a first layer set with index m is multiplexed with a DMRS port with index m; b. The second layer set with index m is multiplexed with the DMRS port with index m+L, where L is the number of layers in the first layer set. Contains one or more of the following:

[0211] 11. (SRS resources may belong to different SRS resource sets to obtain per-SRS-resource power control.) Any of the methods of 1 to 10, a. The first and second SRS resources are respectively configured as first and second SRS resource sets.

[0212] 12. (The power is divided equally among all layers corresponding to one layer set.) Any of the methods 1 to 11, further comprising: a. Dividing the transmit power evenly among the different layers in the layer set; This includes:

[0213] 13. (Layer sets of SRS resources are mapped to different CWs encoded with different MCS.) Any of the methods of 1 to 12, further comprising: a. encoding first and second sets of information bits according to first and second modulation and coding schemes (MCSs), respectively, to generate first and second sets of coded information bits; and b. distributing modulation symbols carrying the coded information bit sets to the first and second layer sets, further including distributing the first set of coded information bits to the first layer set and the second set of coded information bits to the second layer set; Further includes:

[0214] Thus, one or more embodiments described herein provide for allocating power in a manner suitable for a wireless device 22 with limited power capability on each Tx chain, e.g., the power capability of each Tx chain is Pmax / N, where Pmax is the rated power of the wireless device 22 and N is the number of Tx chains in the wireless device 22. The method herein prevents the power required for a particular Tx chain from being exceeded. Also provided is a method that allows control between a set of Tx chains ("panels") in a wireless device 22 to better control the SNR received from the panel by one or more network nodes 16. Power can also be shared between panels by mapping layers to multiple panels. Antennas within a panel can be virtualized to increase the power per antenna port. Multiple codewords can be carried on different panels to better match the received SNR of those panels.

[0215] Some examples

[0216] Example A1 A network node 16 configured to communicate with a wireless device 22, causing transmission of a configuration for physical uplink shared channel (PUSCH) communication, the configuration configuring use of at least a first reference signal (RS) resource and a second RS resource, the first RS resource associated with a first precoder and a first layer set, the second RS resource associated with a second precoder and a second layer set, the first and second layer sets being configured based on a number of non-zero power antenna ports; receiving a PUSCH communication based at least on the configuration; The wireless interface 62 and / or processing circuitry 68 may be configured and / or adapted to cause the wireless interface 62 and / or processing circuitry 68 to perform the above steps.

[0217] Example A2. A network node 16 as described in Example A1, wherein each of the first and second SRS resources includes less than N ports, where N is a value corresponding to one of the maximum number of layers that the wireless device can be configured to transmit and the maximum number of RS ports.

[0218] Example A3. In the network node 16 of example A1, each of the first and second layer sets corresponds to a portion of the total transmit power.

[0219] Example A4. In the network node 16 of example A1, the transmit power associated with the received PUSCH is: Scaling down the transmit power by a number of RS ports in each of the first RS resource and the second RS resource to enable dynamic virtualization; dividing the scaled down transmit power equally among at least the non-zero antenna ports; Based on.

[0220] Example A5. In the network node 16 of example A1, the transmit power associated with the received PUSCH is: If dynamic virtualization is not being used, scaling down the transmit power by the total number of layers and ports supported by the wireless device; dividing the scaled down transmit power equally among at least the non-zero ports; Based on.

[0221] Example A6. The network node 16 of any one of Examples A4 to A5, wherein the dividing comprises: a partitioning across non-zero ports for each of the first and second RS resources; An equal split between all sending ports, Based on one of the following:

[0222] Example B1. 1. A method performed in a network node 16 in communication with a wireless terminal 22, comprising: causing transmission of a configuration for physical uplink shared channel (PUSCH) communication, the configuration configuring use of at least a first reference signal (RS) resource and a second RS resource, the first RS resource associated with a first precoder and a first layer set, the second RS resource associated with a second precoder and a second layer set, the first and second layer sets being configured based on a number of non-zero power antenna ports; receiving a PUSCH communication based at least on the configuration; Includes.

[0223] Example B2. The method of Example B1, wherein each of the first and second SRS resources includes less than N ports, where N is a value corresponding to one of a maximum number of layers that the wireless device can be configured to transmit and a maximum number of RS ports.

[0224] Example B3. The method of example B1, wherein the first layer set and the second layer set each correspond to a portion of a total transmit power.

[0225] Example B4. 4. The method of example B1, wherein a transmit power associated with a received PUSCH is: Scaling down the transmit power by a number of RS ports in each of the first RS resource and the second RS resource to enable dynamic virtualization; dividing the scaled down transmit power equally among at least the non-zero antenna ports; Based on.

[0226] Example B5. 4. The method of example B1, wherein a transmit power associated with the PUSCH is: If dynamic virtualization is not being used, scaling down the transmit power by the total number of layers and ports supported by the wireless device; dividing the scaled down transmit power equally among at least the non-zero ports; Based on.

[0227] Example B6. The method of any one of Examples B4 to B5, wherein the dividing comprises: a partitioning across non-zero ports for each of the first and second RS resources; An equal split between all sending ports, Based on one of the following:

[0228] Example C1. a wireless device 22 configured to communicate with the network node 16, receiving a configuration for physical uplink shared channel (PUSCH) communication, the configuration configuring use of at least a first reference signal (RS) resource and a second RS resource, the first RS resource associated with a first precoder and a first layer set, the second RS resource associated with a second precoder and a second layer set, the first and second layer sets configured based on a number of non-zero power antenna ports; performing PUSCH communication based at least on the configuration; The wireless communication device includes a wireless interface 82 and / or a processing circuit 84 configured and / or adapted to perform the above steps.

[0229] Example C2. In the wireless device of example C1, each of the first and second SRS resources includes less than N ports, where N is a value corresponding to one of the maximum number of layers that the wireless device 22 can be configured to transmit and the maximum number of RS ports.

[0230] Example C3. In the wireless device 22 of example C1, each of the first and second layer sets corresponds to a portion of the total transmit power.

[0231] Example C4. In the wireless device 22 of example C1, the transmit power associated with the transmitted PUSCH is: Scaling down the transmit power by a number of RS ports in each of the first RS resource and the second RS resource to enable dynamic virtualization; dividing the scaled down transmit power equally among at least the non-zero antenna ports; Based on.

[0232] Example C5. In the wireless device 22 of example C1, the transmit power associated with the transmitted PUSCH is: If dynamic virtualization is not being used, scaling down the transmit power by the total number of layers and ports supported by the wireless device; dividing the scaled down transmit power equally among at least the non-zero ports; Based on.

[0233] Example C6. The wireless device 22 of any one of examples C4 to C5, wherein the dividing comprises: a partitioning across non-zero ports for each of the first and second RS resources; An equal split between all sending ports, Based on one of the following:

[0234] Example D1. 1. A method performed in a wireless device 22 in communication with a network node 16, comprising: receiving a configuration for physical uplink shared channel (PUSCH) communication, the configuration configuring use of at least a first reference signal (RS) resource and a second RS resource, the first RS resource associated with a first precoder and a first layer set, the second RS resource associated with a second precoder and a second layer set, the first and second layer sets configured based on a number of non-zero power antenna ports; performing PUSCH communication based at least on the configuration; Includes.

[0235] Example D2. The method of Example D1, wherein each of the first and second SRS resources includes less than N ports, where N is a value corresponding to one of a maximum number of layers that the wireless device can be configured to transmit and a maximum number of RS ports.

[0236] Example D3. The method of example D1, wherein the first layer set and the second layer set each correspond to a portion of a total transmit power.

[0237] Example D4. The method of example D1, wherein a transmit power associated with a transmit PUSCH is: Scaling down the transmit power by a number of RS ports in each of the first RS resource and the second RS resource to enable dynamic virtualization; dividing the scaled down transmit power equally among at least the non-zero antenna ports; Based on.

[0238] Example D5. The method of example D1, wherein a transmit power associated with a transmit PUSCH is: If dynamic virtualization is not being used, scaling down the transmit power by the total number of layers and ports supported by the wireless device; and dividing the scaled down transmit power equally among at least the non-zero ports.

[0239] Example D6. The method of any one of Examples D4 to D5, wherein the dividing comprises: a partitioning across non-zero ports for each of the first and second RS resources; An equal split between all sending ports, Based on one of the following:

[0240] As will be appreciated by those skilled in the art, the concepts described herein may be embodied as a method, a data processing system, a computer program product, and / or a computer storage medium containing an executable computer program. Thus, the concepts described herein may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects, generally referred to herein as a "circuit" or "module." Any process, step, action, and / or function described herein may be performed by and / or associated with a corresponding module, which may be implemented in software and / or firmware and / or hardware. Furthermore, the present disclosure may take the form of a computer program product on a tangible computer usable storage medium having computer program code embodied therein, which may be executed by a computer. Any suitable tangible computer readable storage medium may be utilized, including hard disks, CD-ROMs, electronic storage devices, optical storage devices, or magnetic storage devices.

[0241] Some embodiments are described herein with reference to flowchart illustrations and / or block diagrams of methods, systems and computer program products. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer (thereby creating a special purpose computer), a special purpose computer, or other programmable data processing apparatus, such that execution of the instructions via the processor of the computer or other programmable data processing apparatus creates means for implementing the functions / acts specified in the flowchart illustrations and / or block diagrams.

[0242] These computer program instructions can also be stored in a computer readable memory or readable medium and direct a computer or other programmable data processing apparatus to function in a particular manner, and the instructions stored in the computer readable memory create an article of manufacture that includes instruction means that implement the functions / acts specified in the flowcharts and / or block diagrams.

[0243] Furthermore, the computer program instructions may be loaded into a computer or other programmable data processing apparatus and executed by the computer in a series of operational steps that are executed on the computer or other programmable apparatus, and the instructions executed by the computer or other programmable apparatus provide steps for implementing the functions / operations identified in the flowcharts and / or block diagrams.

[0244] It should be understood that the functions / acts noted in the blocks may occur in a different order than that shown in the operational illustrations. For example, two blocks shown in succession may in fact be executed substantially simultaneously, or the blocks may be executed in the reverse order, depending on the functionality / acts involved. Although some of the figures include arrows on communication paths to indicate a primary direction of communication, it should be understood that communication may occur in the opposite direction to that of the depicted arrow.

[0245] Computer program code for carrying out operations of the concepts described herein can be written in an object-oriented programming language such as Java or C++. However, computer program code for carrying out operations of the present disclosure may also be written in conventional procedural programming languages ​​such as the "C" programming language. The program code can run entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer. In the latter scenario, the remote computer can be connected to the user's computer via a Local Area Network (LAN) or Wide Area Network (WAN), or can be connected (e.g., via the Internet through the use of an Internet Service Provider).

[0246] In connection with the above description and drawings, many different embodiments are disclosed herein. It is understood that literally describing and illustrating every combination and subcombination of these embodiments would be overly repetitive and confusing. Thus, all embodiments can be combined in any manner and / or combination, and the present specification, including the drawings, is to be construed as constituting a complete written description of all combinations and subcombinations of the embodiments and methods and processes described herein that may be made and used, and is to support claims to such combinations or subcombinations.

[0247] The abbreviations used in the above description include the following: Abbreviation Description 3GPP 3rd Generation Partnership Project ASN Abstract Syntax Notation CDM code division multiplexing CB Codebook CE Control Element CP-OFDM Cyclic Prefix OFDM CSI Channel State Information DCI Downlink Control Information DFT Discrete Fourier Transform DFT-S-OFDM DFT spread OFDM DL Downlink DM-RS Demodulation Reference Signal FD-OCC Frequency domain OCC FDD Frequency Division Duplex FR1 Frequency Range 1 FR2 Frequency Range 2 IDFT Inverse DFT gNB gNode B LTE Long Term Evolution MAC Media Access Control MIMO Multiple Input Multiple Output MCS Modulation and Coding Scheme NCB Non-Codebook NR New Radio OCC Orthogonal Cover Code OFDM Orthogonal Frequency Division Multiplexing PA Power Amplifier PAPR Peak to Average Power Ratio PC Power Control PDCCH Physical Downlink Control Channel PDSCH Physical Downlink Shared Channel PSD Power Spectral Density PT-RS Phase Tracking Reference Signal PUCCH Physical Uplink Control Channel PUSCH Physical uplink shared channel QPSK Quadrature Phase Shift Keying RB Resource Block RF Radio Frequency RRC Radio Resource Control RS reference signal RSRP reference signal received power SCS Subcarrier Spacing SNR Signal to Noise Ratio SRI SRS Resource Indicator SRS Sounding Reference Signal SSB sync signal block TD-OCC Time domain OCC TDD Time Division Duplex TPMI Precoder Matrix Index UE User Equipment UL Uplink

[0248] It will be understood by those skilled in the art that the embodiments described herein are not limited to those particularly shown and described hereinabove. Furthermore, unless otherwise noted above, it should be noted that all of the accompanying drawings are not to scale. Various modifications and variations are possible in light of the above teachings without departing from the scope of the appended claims.

Claims

1. A network node (16) in communication with a wireless device (WD) (22), comprising: configuring the wireless device (22) with a plurality of SRS resources; causing transmission of a first indication of a first precoder for use with a first antenna port signal set carrying a first portion of a physical channel, the first antenna port signal set being associated with a first SRS resource of the plurality of SRS resources; causing transmission of a second indication of a second precoder for use with a second antenna port signal set carrying a second portion of the physical channel, the second antenna port signal set being associated with a second SRS resource of the plurality of SRS resources; receiving a transmission of said physical channel; a processing circuit (68) configured to a first physical channel portion and a second physical channel portion, each of which forms a first signal power and a second signal power based on the first indication and the second indication, respectively, and each antenna port signal of the first antenna port signal set is based on a number of non-zero power antenna ports in the first antenna port signal set, and each antenna port signal of the second antenna port signal set is based on a number of non-zero power antenna ports in the second antenna port signal set.

2. A network node (16) according to claim 1, comprising: based on dividing the total component signal power of the physical channel equally or unevenly across the non-zero powered antenna port signals of the first antenna port signal set or across ports corresponding to each resource; The splitting is based on a controlled ratio of the first power signal and the second power signal or on a power control parameter for independently controlling the first power signal and the second power signal.

3. A network node (16) according to claim 1 or 2, comprising: The physical channel is a first set of transmission layers precoded with the first precoder to generate the first set of antenna port signals corresponding to the first physical channel portion; a second set of transmission layers precoded with the second precoder to generate the second set of antenna port signals corresponding to the second physical channel portion; Including, the first signal power is based at least in part on a multiplication of a power of each antenna port signal in the first set of antenna port signals by a number of non-zero power antenna ports in the first set of antenna port signals; The network node, wherein the second signal power is based at least in part on a multiplication of a power of each antenna port signal in the second set of antenna port signals by a number of non-zero power antenna ports in the second set of antenna port signals.

4. A network node (16) according to claim 3, comprising: A network node, wherein the first and second layer sets of transmission layers are mapped to a first and second set of DMRS ports, the first set of DMRS ports corresponding only to the first set of transmission layers, and the second set of DMRS ports corresponding only to the second set of transmission layers.

5. A network node (16) according to any one of claims 1 to 4, comprising: A network node, wherein each of the first SRS resource and the second SRS resource includes less than N ports, where N is a value corresponding to one of a maximum number of transmission layers that the wireless device (22) can transmit and a maximum number of SRS ports.

6. A network node (16) according to any one of claims 1 to 5, comprising: The first signal power and the second signal power are values ​​based on dividing the first signal power and the second signal power by N.

7. A network node (16) according to any one of claims 1 to 6, comprising: the first signal power and the second signal power are values ​​based on dividing the first signal power and the second signal power by a first number and a second number of SRS ports, respectively, the first number and the second number of SRS ports being numbers of SRS ports in the first SRS resource and the second SRS resource, respectively; the first signal power is divided evenly among the antenna port signals of the first set of antenna port signals; The second signal power is divided evenly among the antenna port signals of the second set of antenna port signals.

8. A network node (16) according to any one of claims 1 to 7, comprising: The physical channel signaling corresponds to a physical uplink shared channel.

9. A wireless device (22) in communication with a network node (16), comprising: receiving signaling to configure the wireless device (22) with a plurality of SRS resources; receiving a first indication of a first precoder for use with a first antenna port signal set carrying a first portion of a physical channel, the first antenna port signal set being associated with a first SRS resource of the plurality of SRS resources; receiving a second indication of a second precoder for use with a second antenna port signal set carrying a second portion of the physical channel, the second antenna port signal set being associated with a second SRS resource of the plurality of SRS resources; adjusting the first and second physical channel portions to form first and second signal powers according to the first and second indications, where each antenna port signal of the first antenna port signal set is adjusted by the number of non-zero power antenna ports in the first antenna port signal set and each antenna port signal of the second antenna port signal set is adjusted by the number of non-zero power antenna ports in the second antenna port signal set; causing transmission of said physical channel; A wireless device comprising a processing circuit (84) configured to perform the following:

10. A wireless device (22) according to claim 9, comprising: based on dividing the total component signal power of the physical channel equally or unevenly across the non-zero powered antenna port signals of the first antenna port signal set or across ports corresponding to each resource; A wireless device, wherein the division is based on a controlled ratio of the first power signal and the second power signal or a power control parameter for independently controlling the first power signal and the second power signal.

11. A wireless device according to claim 9 or 10, The processing circuit (84) further comprises: precoding a first set of transmission layers with the first precoder to generate the first set of antenna port signals corresponding to the first physical channel portion; precoding a second set of transmission layers with the second precoder to generate the second set of antenna port signals corresponding to the second physical channel portion; adjusting the first signal power based at least in part on multiplying a power of each antenna port signal in the first antenna port signal set by a number of non-zero power antenna ports in the first antenna port signal set; adjusting the second signal power based at least in part on multiplying a power of each antenna port signal in the second antenna port signal set by a number of non-zero power antenna ports in the second antenna port signal set; A wireless device configured to:

12. A wireless device (22) according to claim 11, comprising: The processing circuitry (84) is further configured to map the first and second layer sets of transmission layers to a first and second set of DMRS ports; A wireless device, wherein the first set of DMRS ports correspond only to the first set of transmission layers and the second set of DMRS ports correspond only to the second set of transmission layers.

13. A wireless device (22) according to any one of claims 9 to 12, comprising: A wireless device, wherein each of the first SRS resource and the second SRS resource includes less than N ports, where N is a value corresponding to one of a maximum number of transmission layers that the wireless device (22) can transmit and a maximum number of SRS ports.

14. A wireless device (22) according to any one of claims 11 to 13, comprising: The processing circuitry (84) is further configured to additionally adjust the first and second signal powers by dividing the first and second signal powers by N.

15. A wireless device according to any one of claims 11 to 13, The processing circuit (84) further comprises: additionally adjusting the first signal power and the second signal power by dividing the first signal power and the second signal power by a first number and a second number of SRS ports, respectively, the first number and the second number of SRS ports being numbers of SRS ports in the first SRS resource and the second SRS resource, respectively; dividing the adjusted first signal power evenly among the antenna port signals of the first set of antenna port signals; dividing the adjusted second signal power evenly among the antenna port signals of the second set of antenna port signals; 2. A wireless device configured to:

16. A wireless device (22) according to any one of claims 9 to 15, comprising: The physical channel signaling corresponds to a physical uplink shared channel.

17. A method performed in a network node (16) in communication with a wireless device (22), comprising the steps of: Configuring (S138) the wireless device (22) with a plurality of SRS resources; causing transmission of a first indication of a first precoder for use with a first antenna port signal set carrying a first portion of a physical channel, the first antenna port signal set being associated with a first SRS resource of the plurality of SRS resources (S140); causing transmission of a second indication of a second precoder for use with a second antenna port signal set carrying a second portion of the physical channel, the second antenna port signal set being associated with a second SRS resource of the plurality of SRS resources (S142); receiving (S144) a transmission of the physical channel; the first physical channel portion and the second physical channel portion form first and second signal powers based on the first indication and the second indication, respectively, and each antenna port signal of the first antenna port signal set is based on a number of non-zero power antenna ports in the first antenna port signal set, and each antenna port signal of the second antenna port signal set is based on a number of non-zero power antenna ports in the second antenna port signal set.

18. 20. The method of claim 17, based on dividing the total component signal power of the physical channel equally or unevenly across the non-zero powered antenna port signals of the first antenna port signal set or across ports corresponding to each resource; A method, wherein the division is based on a controlled ratio of the first power signal and the second power signal or on a power control parameter for independently controlling the first power signal and the second power signal.

19. 19. The method of claim 17 or 18, The physical channel is a first set of transmission layers precoded with the first precoder to generate the first set of antenna port signals corresponding to the first physical channel portion; a second set of transmission layers precoded with the second precoder to generate the second set of antenna port signals corresponding to the second physical channel portion; Including, the first signal power is based at least in part on a multiplication of a power of each antenna port signal in the first set of antenna port signals by a number of non-zero power antenna ports in the first set of antenna port signals; The method of claim 1, wherein the second signal power is based at least in part on a multiplication of a power of each antenna port signal in the second set of antenna port signals by a number of non-zero power antenna ports in the second set of antenna port signals.

20. 20. The method of claim 19, A method, wherein the first and second layer sets of transmission layers are mapped to a first and second set of DMRS ports, the first set of DMRS ports corresponding only to the first set of transmission layers, and the second set of DMRS ports corresponding only to the second set of transmission layers.

21. 21. The method according to any one of claims 17 to 20, comprising: The method, wherein each of the first SRS resource and the second SRS resource includes less than N ports, where N is a value corresponding to one of a maximum number of transmission layers that the wireless device (22) can transmit and a maximum number of SRS ports.

22. 22. The method according to any one of claims 17 to 21, comprising: The method of claim 1, wherein the first signal power and the second signal power are values ​​based on dividing the first signal power and the second signal power by N.

23. 23. The method according to any one of claims 17 to 22, comprising: the first signal power and the second signal power are values ​​based on dividing the first signal power and the second signal power by a first number and a second number of SRS ports, respectively, the first number and the second number of SRS ports being numbers of SRS ports in the first SRS resource and the second SRS resource, respectively; the first signal power is divided evenly among the antenna port signals of the first set of antenna port signals; The method of claim 1, wherein the second signal power is divided evenly among the antenna port signals of the second set of antenna port signals.

24. 24. The method according to any one of claims 17 to 23, comprising: The method, wherein the physical channel signaling corresponds to a physical uplink shared channel.

25. A method performed in a wireless device (22) in communication with a network node (16), comprising: Receiving (S150) signaling to configure the wireless device (22) with a plurality of SRS resources; receiving (S152) a first indication of a first precoder for use with a first antenna port signal set carrying a first portion of a physical channel, the first antenna port signal set being associated with a first SRS resource of the plurality of SRS resources; receiving (S154) a second indication of a second precoder for use with a second antenna port signal set carrying a second portion of the physical channel, the second antenna port signal set being associated with a second SRS resource of the plurality of SRS resources; adjusting (S156) the first physical channel portion and the second physical channel portion forming a first signal power and a second signal power according to the first indication and the second indication, where each antenna port signal of the first antenna port signal set is adjusted by the number of non-zero power antenna ports of the first antenna port signal set, and each antenna port signal of the second antenna port signal set is adjusted by the number of non-zero power antenna ports of the second antenna port signal set; transmitting the physical channel (S158); The method includes:

26. 26. The method of claim 25, based on dividing the total component signal power of the physical channel equally or unevenly across the non-zero powered antenna port signals of the first antenna port signal set or across ports corresponding to each resource; A method, wherein the division is based on a controlled ratio of the first power signal and the second power signal or on a power control parameter for independently controlling the first power signal and the second power signal.

27. 27. The method of claim 25 or 26, further comprising: precoding a first set of transmission layers with the first precoder to generate the first set of antenna port signals corresponding to the first physical channel portion; precoding a second set of transmission layers with the second precoder to generate the second set of antenna port signals corresponding to the second physical channel portion; adjusting the first signal power based at least in part on multiplying a power of each antenna port signal in the first antenna port signal set by a number of non-zero power antenna ports in the first antenna port signal set; adjusting the second signal power based at least in part on multiplying a power of each antenna port signal in the second antenna port signal set by a number of non-zero power antenna ports in the second antenna port signal set; A method comprising:

28. 28. The method of claim 27 further comprising: mapping the first and second sets of transmission layers to a first and second set of DMRS ports; The method, wherein the first set of DMRS ports corresponds only to the first set of transmission layers and the second set of DMRS ports corresponds only to the second set of transmission layers.

29. 29. The method of any one of claims 25 to 28, comprising: The method, wherein each of the first SRS resource and the second SRS resource includes less than N ports, where N is a value corresponding to one of a maximum number of transmission layers that the wireless device (22) can transmit and a maximum number of SRS ports.

30. 30. The method of any one of claims 27 to 29, further comprising: additionally adjusting the first and second signal powers by dividing the first and second signal powers by N.

31. 30. The method of any one of claims 27 to 29, further comprising: additionally adjusting the first signal power and the second signal power by dividing the first signal power and the second signal power by a first number and a second number of SRS ports, respectively, the first number and the second number of SRS ports being numbers of SRS ports in the first SRS resource and the second SRS resource, respectively; dividing the adjusted first signal power evenly among the antenna port signals of the first set of antenna port signals; dividing the adjusted second signal power evenly among the antenna port signals of the second set of antenna port signals; The method includes:

32. 32. The method of any one of claims 25 to 31, wherein the physical channel signaling corresponds to a physical uplink shared channel.

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