Time division multiplexing (TDM) of 8-port sounding reference signals (SRS)

Abstract

Methods, network nodes and wireless devices (WDs) for time division multiplexing (TDM) of an eight-port sounding reference signal (SRS) are disclosed. According to one aspect, a method in a network node comprises: configuring, for a WD, cyclic mapping parameters for cyclically mapping sounding reference signal (SRS) ports to SRS symbols, the cyclic mapping parameters comprising a number N of SRS port subsets and a number M of Orthogonal Frequency Division Multiplexing (OFDM) symbols to which the SRS port subsets are cyclically mapped; and configuring the WD to perform SRS transmission according to the cyclic mapping.

Description

Technical Field

[0001] This disclosure relates to wireless communication, and more particularly to time division multiplexing (TDM) of sounding reference signals (SRS) (such as eight-port SRS). Background Technology

[0002] The 3rd Generation Partnership Project (3GPP) has developed and is developing 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. Among other features, these systems provide broadband communication between network nodes (such as base stations) and mobile wireless devices (WDs), as well as communication between network nodes and between WDs. 3GPP is also developing standards for sixth-generation (6G) wireless communication networks.

[0003] Parameter set In the time domain, NR downlink (DL) and uplink (UL) transmissions are organized into equal-sized 1ms subframes. Each subframe is further divided into multiple time slots of equal duration. The time slot length depends on the parameter set (i.e., on the subcarrier spacing (SCS) and cyclic prefix (CP)). For a 15kHz SCS, each subframe has only one time slot. Generally, for... kHz SCS (where (This is the SCS configuration), each subframe has Each time slot consists of 14 symbols (unless extended CP is configured, in which case each time slot consists of 12 symbols).

[0004] In the frequency domain, the system bandwidth is divided into RBs, each corresponding to 12 consecutive subcarriers. One subcarrier during a symbol period forms an RE, which is the minimum physical resource in the NR.

[0005] SRS In NR, the sounding reference signal (SRS) is used to provide channel state information (CSI) to network nodes in UL. The uses of SRS include, for example, deriving appropriate transmit / receive beams and / or performing link adaptation (i.e., setting the transmission rank and modulation and coding scheme (MCS)), and determining the precoding matrices for the Physical Downlink Shared Channel (PDSCH) and Physical Uplink Shared Channel (PUSCH).

[0006] SRS is configured via Radio Resource Control (RRC) signaling, where portions of the configuration can be updated via Media Access Control (MAC) Control Element (CE) signaling (to reduce latency). RRC configuration includes, for example, SRS resource allocation (physical mapping and the sequence to be used) and time-domain behavior (aperiodic, semi-persistent, or periodic). For aperiodic SRS transmissions, RRC configuration does not activate SRS transmissions from the WD; instead, it transmits a dynamic activation trigger from the network node via Downlink Control Information (DCI) in the Physical Downlink Control Channel (PDCCH), instructing the WD to transmit an SRS once at a predetermined time.

[0007] SRS Configuration When SRS transport is configured, network nodes communicate via... SRS-Config The list of SRS resources and the list of SRS resource sets configured in IE (see the following excerpt from the ASN of 3GPP technical standard (3GPP TS 38.331) version 17.2.0): SRS resources will be transmitted as part of SRS resource sets, where each SRS resource set contains one or more SRS resources. NR supports configurations of up to 16 SRS resource sets and 64 SRS resources per bandwidth portion (BWP). Furthermore, NR supports periodic, semi-persistent, or aperiodic SRS transmissions. • Periodic SRS (p-SRS): The SRS resource set and SRS resources are configured by RRC. The SRS resource configuration includes slot periodicity and offset, which determine the timing of SRS transmission; Semi-persistent SRS (sp-SRS): The SRS resource set and SRS resources are configured using RRC. SRS resource configuration includes slot periodicity and offset, and MAC CE signaling is used to activate / deactivate SRS transmissions; and • Aperiodic SRS (ap-SRS): The SRS resource set and SRS resources are configured by RRC. The SRS resource set configuration includes slot offsets, and SRS transmissions are dynamically triggered via a 2-bit “SRS Request” field in the DCI (e.g., in DCI format 0_1 ​​or DCI format 1_1).

[0008] All SRS resources in an SRS resource set must share the same temporal behavior.

[0009] In short, SRS resource set configuration determines, for example, the SRS purpose, power control (PC) parameters, and slot offsets for ap-SRS. SRS resource configuration determines, for example, SRS time and frequency allocation, SRS sequence, periodicity, and offsets for p-SRS / sp-SRS.

[0010] SRS Resource Set Configuration Configure the SRS resource set using the following from the RRC (see the ASN code in 3GPP TS 38.331 version 17.2.0): SRS resource sets are configurable.

[0011] For ap-SRS, the slot offset is determined by higher-level parameters. slotOffset Configure and set the delay from the start of receiving SRS transmissions triggered by the PDCCH.

[0012] By higher-level parameters usage The configured resource usage settings impose constraints and assumptions on resource attributes (see 3GPP TS38.214 for further details). SRS resource sets can be configured for one of four different uses: antennaSwitching , codebook, nonCodebook or beamManagement .

[0013] Configured for use antennaSwitching The SRS resource set is used for reciprocity-based DL precoding (i.e., for probing channels in the UL so that network nodes can use reciprocity to set up the appropriate DL precoder). It is expected that WD will transmit one SRS port per WD antenna port.

[0014] Configured for use codebook The SRS resource set is used for CB-based UL transmissions (i.e., for detecting different WD antennas and helping network nodes determine / signal the appropriate UL precoder, transmission rank, and MCS for PUSCH transmissions). In applications... codebook The SRS resource set can have up to two SRS resources. However, how the SRS ports are mapped to the WD antenna ports depends on the WD implementation and is unknown to the network nodes.

[0015] Configured for use nonCodebookThe SRS resource set is used for non-codebook (NCB) based UL transmissions. Specifically, the WD transmits one SRS resource for each candidate beam (the appropriate candidate beam is determined by the WD based on CSI-reference signal (RS) measurements in the DL, and therefore reciprocity needs to be maintained). Network nodes can then determine which UL beam(s)(s) the WD should apply to the PUSCH transmission by specifying a subset of these SRS resources. Each specified SRS resource will transmit one UL layer. Note that how the WD maps SRS ports to antenna ports depends on the WD implementation and is not known to the network nodes.

[0016] Configured for use beamManagement The SRS resource set (primarily for frequency bands above 6 GHz (i.e., for FR2)) is used to evaluate different WD analog beams (e.g., panels). The WD transmits one SRS resource for each analog beam, and the network node performs a Reference Signal Received Power (RSRP) measurement on each transmitted SRS resource, thereby determining the appropriate WD beam to report to the WD.

[0017] For each of the possible resource types, the associated Channel State Information Reference Signal (CSI-RS) (this configuration is only applicable to NCB-based UL transmissions).

[0018] For app-SRS, the associated CSI-RS resources are determined by higher-level parameters. csi-RS To determine.

[0019] For p-SRS / sp-SRS, the associated CSI-RS resources are determined by higher-level parameters. associated CSI-RS To determine.

[0020] PC parameters (e.g., alpha and p0 This is used to set the SRS transmission power. In NR, SRS has its own UL PC scheme (see 3GPP TS 38.213 for further details), which specifies how the WD should split the available output power between two or more SRS ports during an SRS transmission window (which is a time window within a time slot in which an SRS transmission is performed).

[0021] SRS resource allocation Configure each SRS resource using the following from the RRC (see the ASN code below from 3GPP TS 38.331 version 17.2.0): SRS resources are configurable for the following: • By higher-level parameters nrofSRS-Ports Configure the number of SRS ports (1, 2, or 4); • By higher-level parameters transmissionComb The transmission comb configured (i.e., mapped to every 2nd or 4th subcarrier) includes: The specification is determined by higher-level parameters. combOffset To configure the comb offset (i.e., which of these combs should be used); о By higher-level parameters cyclicShift To configure the cyclic shift (CS), this parameter cyclicShift Configure a CS (port-specific) for the Zadoff-Chu sequence used for SRS (for multi-port SRS resources). The use of CS allows SRS ports to be multiplexed on the same comb offset; however, there is a limit to the number of CSs that can be used per comb offset (8 for comb 2 and 12 for comb 4). Given the time-domain location within a time slot, higher-level parameters are used. resourceMapping To configure, it includes: By higher-level parameters startPosition The starting position of the time domain is configured, which is limited to one of the last 6 symbols; By higher-level parameters nrofSymbols The number of symbols configured for SRS resources (which can be set to 1, 2, or 4); and By higher-level parameters repetitionFactor The repetition factor is configured (it can be set to 1, 2, or 4). When the repetition factor is greater than 1, the same frequency resources are used multiple times across symbols to improve coverage, as this allows the receiver to collect more energy.

[0022] The detection bandwidth, frequency domain location and shift of SRS resources, as well as the frequency hopping mode (i.e., which portion of the transmission bandwidth is occupied by SRS resources), are determined by higher-level parameters. freqDomainPosition , freqDomainShift as well as freqHopping parameter c-SRS , b-SRS and b-hop To configure this, the minimum possible detection bandwidth is 4 RBs.

[0023] Higher-level parameters resourceTypeDetermine whether the SRS resource is transmitted as periodic, aperiodic (a single transmission triggered by DCI), or semi-persistent (the same as periodic, except that the start and stop of periodic transmissions are controlled by MAC-CE signaling instead of RRC signaling).

[0024] Higher-level parameters sequenceId It specifies how to initialize the SRS sequence.

[0025] Higher-level parameters spatialRelationInfo Configure the spatial relationship of the SRS beam with respect to another RS ​​(which can be another SRS, a Synchronization Signal Block (SSB), or a CSI-RS). If an SRS resource has a spatial relationship with another SRS resource, then that SRS resource should be transmitted using the same beam (i.e., virtualized) as the indicated SRS resource.

[0026] In NR 3GPP technical release 17 (3GPP Rel-17), transport comb 8 is supported. For transport comb 8, the number of CS offsets per comb is 6 (see higher layer parameters). transmissionComb-n8-r17 ).

[0027] In NR 3GPP Rel-16, SRS resources can occupy any of the 14 symbols in a time slot, but the number of symbols per SRS resource is limited to 4 (see higher layer parameters). resourceMapping-r16 In NR 3GPPRel-17, SRS, the number of symbols per SRS resource can be up to 14 (see higher-level parameters). resourceMapping- r17 ).

[0028] For NR 3GPP Rel-15 / Rel-16, Figure 1 The diagram provides an illustration of how SRS resources can be allocated in terms of time and frequency within time slots (note that semi-persistent / periodic SRS resources typically span several time slots).

[0029] SRS antenna switching It is desirable for network nodes to detect all WD antennas (where detecting an antenna implies the transmission of SRS from that antenna), however, equipping WDs with numerous transmit (Tx) chains is costly. Therefore, for WDs equipped with more receive (Rx) chains than Tx chains, SRS antenna switching was introduced in NR 3GPP Rel-15. If a WD supports antenna switching, it will report this via WD capability signaling (see, for example, Table 1 copied from 3GPP TS 38.306).

[0030] Table 1. SRS antenna switching capabilities supported by WD.

[0031] The left column of Table 1 lists the WD capabilities for SRS antenna switching that can be reported by the WD in NR 3GPP Rel-15. For example, if the WD reports... t1r2 This means it has two receive (Rx) antennas (i.e., it has two Rx chains), but only one transmission from one of those antennas (i.e., it has one Tx chain). In this case, two single-port SRS resources can be configured for the WD, allowing it to use the Tx transmit port to probe the two Rx ports and switch antennas between them.

[0032] In NR 3GPP Rel-16, additional WD capabilities for SRS antenna switching were introduced, shown in the right column of Table 1. Here, WD can specify support for only detecting a subset of Rx antennas, which saves WD power consumption and SRS overhead at the cost of reduced channel knowledge at network nodes. For example, WD capabilities... t1r1-t1r2 Specify that each network node can have a purpose antennaSwitching The SRS resource set is configured with one single-port SRS resource (without antenna switching) or two single-port SRS resources (as per the above for capability). t1r2 (The same as described).

[0033] In NR 3GPP Rel-17, antenna switching has been extended to up to 6 or 8 Rx ports, and 1, 2, or 4 Tx chains. WD can be configured via higher-level parameters. srs-AntennaSwitchingBeyond4Rx-r17 This indicates support for antenna switching configurations with more than 4 Rx (see 3GPP TS 38.306 for further details).

[0034] SRS coverage Improved SRS coverage has been implemented in NR, including SRS resource duplication and / or frequency hopping. Before explaining these two approaches, please refer to the following: Figure 2 This is an example of SRS transmission without frequency hopping and / or repetition. Here, the entire SRS bandwidth is probed in a single symbol.

[0035] Figure 3 An example of SRS frequency hopping is provided. Here, different portions of the SRS bandwidth are probed in each of the four different OFDM symbols, meaning that the power spectral density (PSD) used for SRS will be improved (reaching) Figure 2 (Four times that of the baseline case), at the cost of more symbols being used for SRS and shorter SRS sequence length per OFDM symbol.

[0036] Figure 4An example of SRS repetition is provided. Here, an SRS resource is repeated across four consecutive OFDM symbols, which means that the PSD used for the SRS will be improved (reaching...). Figure 2 (Four times that of the baseline case), at the cost of more symbols being used in SRS and reduced SRS (multiplexing) capacity.

[0037] It is worth noting that SRS repetition and frequency hopping can be used together, and for p-SRS / sp-SRS, the frequency hopping mode continues beyond the time slot boundaries. On the other hand, for ap-SRS, all portions of the configured bandwidth must be probed within the time slot. To illustrate these two points, Figure 5 This illustrates the p-SRS resources (with periodicity) between two adjacent UL time slots. Here, the frequency hopping configuration is... Figure 3 The same applies here, the repetition factor is 2, and the number of SRS symbols per slot is 4. Note that in this example (and in all previous examples), all jumps (highlighted in blue in one or more diagrams) belong to the same SRS resource.

[0038] SRS capacity In NR, schemes have been adopted to improve SRS capacity (i.e., the number of SRS ports that can be reused on a finite set of time and frequency resources). These schemes include using transport combs 2, 4, or 8 (i.e., probing only every 2nd, 4th, or 8th subcarrier within the configured bandwidth), and multiplexing several SRS ports onto the same transport comb by using different CS.

[0039] Figure 6 This illustrates how two or four single-port SRS resources can be multiplexed onto the same configured SRS bandwidth by using transport combs 2 and 4 respectively. Here, the different SRS resources have been configured with different comb offsets (i.e., the RRC is configured with parameters). combOffset (different values). In Figure 6 In this process, two and four single-port SRS resources are multiplexed using transmission combs 2 and 4, respectively (with varying comb offsets).

[0040] The SRS base sequences used in NR are paired orthogonal under CS. Utilizing this property, it is possible to multiplex several SRS ports onto the same transport comb by using different CSs (and the same base sequences) for different SRS ports. For transport combs 2, 4, and 8, the maximum number of CSs is 8, 12, and 6, respectively. For multi-port SRS resources, different SRS ports belonging to the same SRS resource will each be configured with a port-specific CS. Furthermore, for four-port SRS resources, it is possible (or required for transport comb 8) to use up to two different transport combs (each with two SRS ports, and therefore two CSs).

[0041] Figure 7 It is the discrete-time representation (after calculating the Inverse Discrete Fourier Transform (IDFT)) of the correlation (absolute value) between the cyclically shifted basis sequences and their corresponding unshifted basis sequences. Here, the transport comb is 2 (making the maximum number of CSs 8), and the sequence length is 48 (which corresponds to an SRS transport across 8 resource blocks (RBs). Figure 7 As shown, the sequences are orthogonal and therefore can be separated by simple signal processing (e.g., by time-domain windowing). Figure 7 In this case, the sequence length is 48 samples, and the maximum number of CSs is 8 (the transfer comb is 2).

[0042] However, there are drawbacks to increasing SRS capacity by using higher transmission combs and / or using a larger number of CS. Figure 8 and Figure 9 This is when passing through a frequency-selective channel, i.e., with non-zero delay spread (in Figure 8 and Figure 9 How does the delay spread (15 discrete samples) affect the transmission of SRS in a channel? Figure 7 Examples of correlation (absolute values) in the diagram. Note the loss of orthogonality between SRS sequences due to frequency-selective channels. Further note that increasing the number of CSs (used) leads to more interference (compare the upper and lower parts of the diagram). Assuming perfect synchronization, the maximum interference-free channel delay spread is inversely proportional to the product of the subcarrier spacing, the transport comb, and the number of (occupied and evenly spaced) CSs.

[0043] exist Figure 8 and Figure 9 In this example, the sequence length is 48 samples, and the maximum number of CSs is 8 (transfer combs are 2). Figure 8 In this configuration, four equidistant SRS ports (i.e., CS) are multiplexed on the same comb offset. Figure 9 In this configuration, eight equidistant SRS ports (i.e., CS) are multiplexed on the same comb offset.

[0044] In NR 3GPP Rel-18, in order to support WDs equipped with 8 Tx chains, the maximum number of ports per SRS resource in an SRS resource set with the purpose of 'codebook' or 'antennaSwitching' will be increased from 4 (in the traditional NR) to 8.

[0045] During the RAN1#110bis-e meeting, it was agreed that all eight ports of the resource could be mapped to m On each of the symbols, where .

[0046] During the RAN1#111 meeting, in order to improve SRS coverage, it was also agreed that TDM support would be provided for 8-port SRS resources. Specifically, the following agreement was reached: --- agreement For a single SRS resource in an SRS resource set with the purpose of 'codebook' (for 8Tx PUSCH) or 'antennaSwitching' (i.e., for 8T8R antenna switching), when the SRS resource is configured with 8 ports and m OFDM symbols (m>1), it supports the case where 8 ports are mapped to m OFDM symbols. Option 1: Different SRS ports are mapped to different OFDM symbols (i.e., TDM). FFS: m can be a traditional value, i.e., 2, 4, [8, 10, 12, 14]. ---- According to the aforementioned agreement, m Each symbol in the set transmits only a subset of 8 SRS ports. However, it is unclear how these SRS ports will be split into... m Within these symbols. Furthermore, it is unclear how to map a subset of the SRS ports of the 8-port SRS resource to... m Comb offset and cyclic shift in each of the symbols. Summary of the Invention

[0047] Some embodiments advantageously provide methods, network nodes, and wireless devices for time division multiplexing (TDM) of an eight-port probe reference signal (SRS).

[0048] Some embodiments may provide configuration, signaling, restrictions, and rules for SRS TDM, including formulas for mapping SRS ports to cyclic shifts and comb offsets.

[0049] Some embodiments specify associating a subset of SRS ports in an 8-port SRS resource with a subset of configured SRS symbols. In some embodiments, the mapping may be such that the number of SRS ports and symbols is the same for each subset. • The subsets of SRS ports do not overlap. The number of SRS ports in any subset can be equal to the number of configured SRS ports; and / or • Subsets of SRS symbols do not overlap. The number of symbols in any subset can be less than or equal to the number of configured SRS symbols.

[0050] In some embodiments, SRS ports may be mapped to SRS symbols in the following manner: • Sequential mapping mode; and / or • Circular mapping mode.

[0051] In some embodiments, the SRS ports within each subset are mapped to comb offsets and cyclic shifts according to mapping rules, such that: • The same set of comb offsets and cyclic shifts is used for all subsets; or • The set of comb offsets and cyclic shifts in all subsets is the same as the set of comb offsets and cyclic shifts used for SRS resources that are not configured with TDM.

[0052] Some embodiments provide TDM configuration for SRS, which can improve SRS coverage across SRS resources with varying numbers of symbols. Some embodiments provide TDM configuration along with conventional SRS coverage enhancement schemes (i.e., repetition, frequency hopping, resource block-level partial frequency probing (RPFS)).

[0053] According to one aspect, a method is provided in a network node configured to communicate with a wireless device (WD). The method includes configuring the WD with cyclic mapping parameters for cyclically mapping Sounding Reference Signal (SRS) ports to SRS symbols, the cyclic mapping parameters including a number N of SRS port subsets and a number M of Orthogonal Frequency Division Multiplexing (OFDM) symbols to which the SRS port subsets are cyclically mapped. The method further includes configuring the WD to perform SRS transmissions according to the cyclic mapping.

[0054] According to one aspect, in some embodiments, the number of SRS ports in the subset of N subsets of SRS ports is a ratio. This ratio represents the number of SRS ports per SRS symbol subset when Time Division Duplex (TDM) is configured, where This indicates the number of SRS ports for each SRS resource, and F TDM It is a TDM factor equal to N. In some embodiments, when TDM is configured, F TDM It equals 2, otherwise, F TDM It equals 1. In some embodiments, only the ratio is configured to be obtained. Integer and F TDM The combination, in which It is equal to M and is configured by Radio Resource Control (RRC). In some embodiments, the ratio is allowed only if the SRS resource is configured with one or more of repetition, frequency hopping, and RPFS. Greater than 1. In some embodiments, when the ratio If it is not an integer, then it is less than the ratio. The nearest integer is the number of SRS symbols in each subset of SRS ports. In some embodiments, when the ratio... When the value is not an integer, the number of symbols in each SRS port subset varies across the N SRS port subsets. In some embodiments, when the ratio... When the values ​​are not integers, the number of symbols and the number of SRS ports for each SRS port subset vary across the N port subsets. In some embodiments, when the ratio... If the value is greater than 1 and repetition, frequency hopping, and RPFS are not configured, then in Each subset of SRS symbols is repeated within a subset of OFDM symbols. One SRS port. In some embodiments, the method includes: configuring the WD to operate on multiple consecutive SRS ports. F TDM Transmitted in each set of symbols Repeating of SRS ports. In some embodiments, the method includes: configuring the WD to detect SRS ports when both TDM and frequency hopping or both TDM and resource block-based partial frequency detection (RPFS) are configured. In some embodiments, each subset of SRS ports occupies the same set of comb offset and cyclic shift (CS). In some embodiments, the comb offset for the antenna port is at least partially based on a ratio. In some embodiments, the cyclic shift for the antenna port is at least partially based on a ratio. In some embodiments, when the 8-port SRS resource is configured with both TDM and cyclic shift frequency hopping, or with both TDM and comb offset frequency hopping, then it is used for a quantity of The frequency hopping mode for each subset of the SRS ports is used for Same frequency hopping mode for port SRS resources.

[0055] According to another aspect, a method is provided in a wireless device (WD) configured to communicate with a network node. The method includes receiving from the network node cyclic mapping parameters for cyclically mapping Sounding Reference Signal (SRS) ports to SRS symbols, the cyclic mapping parameters including a number N of SRS port subsets and a number M of Orthogonal Frequency Division Multiplexing (OFDM) symbols to which the SRS port subsets are cyclically mapped. The method further includes cyclically mapping N SRS port subsets to M OFDM symbols. The method further includes performing SRS transmission according to the cyclic mapping.

[0056] Accordingly, in some embodiments, the number of SRS ports in the subset of N subsets of SRS ports is a ratio. This ratio represents the number of SRS ports per SRS symbol subset when Time Division Duplex (TDM) is configured, where This indicates the number of SRS ports for each SRS resource, and F TDM It is a TDM factor equal to N. In some embodiments, the method includes: in multiple consecutive F TDM Transmitted in each set of symbols The method involves detecting SRS ports within a subset of SRS ports when both TDM and frequency hopping or both TDM and Partial Frequency Probing Based on Resource Blocks (RBs) are configured. In some embodiments, when both TDM and frequency hopping are configured, the same frequency counter is used to determine the frequency domain location for all subsets of SRS ports.

[0057] According to another aspect, a network node configured to communicate with a wireless device (WD) is provided. The network node is configured to configure the WD with cyclic mapping parameters for cyclically mapping Sounding Reference Signal (SRS) ports to SRS symbols, the cyclic mapping parameters including the number N of SRS port subsets and the number M of Orthogonal Frequency Division Multiplexing (OFDM) symbols to which the SRS port subsets are cyclically mapped. The network node is further configured to configure the WD to perform SRS transmissions according to the cyclic mapping.

[0058] Accordingly, in some embodiments, the number of SRS ports in the subset of N subsets of SRS ports is a ratio. This ratio represents the number of SRS ports per SRS symbol subset when Time Division Duplex (TDM) is configured, where This indicates the number of SRS ports for each SRS resource, and F TDM It is a TDM factor equal to N. In some embodiments, when TDM is configured, F TDM It equals 2, otherwise, F TDM It equals 1. In some embodiments, only the ratio is configured to be obtained. Integer and F TDM The combination, in which It is equal to M and is configured by Radio Resource Control (RRC). In some embodiments, the ratio is allowed only if the SRS resource is configured with one or more of repetition, frequency hopping, and RPFS. Greater than 1. In some embodiments, when the ratio If it is not an integer, then it is less than the ratio. The nearest integer is the number of symbols in each subset of SRS ports. In some embodiments, when the ratio When the value is not an integer, the number of symbols in each SRS port subset varies across the N SRS port subsets. In some embodiments, when the ratio... When the values ​​are not integers, the number of symbols and the number of SRS ports for each SRS port subset vary across the N port subsets. In some embodiments, when the ratio... If the value is greater than 1 and repetition, frequency hopping, and RPFS are not configured, then in Each subset of SRS symbols is repeated within a subset of OFDM symbols. One SRS port. In some embodiments, the network node is configured to: configure the WD to be in multiple consecutive... F TDM Transmitted in each set of symbols The SRS port is repeated. In some embodiments, the network node is configured to: configure the WD to detect the SRS port when both TDM and frequency hopping or both TDM and resource block-based partial frequency probing (RPFS) are configured. In some embodiments, each subset of SRS ports occupies the same set of comb offset and cyclic shift (CS). In some embodiments, the comb offset for the antenna port is at least partially based on a ratio. In some embodiments, the cyclic shift for the antenna port is at least partially based on a ratio. In some embodiments, when an 8-port SRS resource is configured with both TDM and cyclic shift or both TDM and comb offset frequency hopping, the frequency hopping mode for each subset of P SRS ports is the same frequency hopping mode used for the P-port SRS resource.

[0059] According to another aspect, a WD configured to communicate with a network node is provided. The WD is configured to receive from the network node cyclic mapping parameters for cyclically mapping Sounding Reference Signal (SRS) ports to SRS symbols, the cyclic mapping parameters including the number N of SRS port subsets and the number M of Orthogonal Frequency Division Multiplexing (OFDM) symbols to which the SRS port subsets are cyclically mapped. The WD is configured to cyclically map N SRS port subsets to M OFDM symbols. The WD is further configured to perform SRS transmission according to the cyclic mapping. In some embodiments, the number of SRS ports in the N subsets of SRS ports is based on a ratio. This ratio represents the number of SRS ports per SRS symbol subset when Time Division Duplex (TDM) is configured, where This indicates the number of SRS ports for each SRS resource, and F TDM It is a TDM factor equal to N. In some embodiments, the WD is configured to: in multiple consecutive F TDMTransmitted in each set of symbols The SRS port repeats. In some embodiments, the WD is configured to: probe SRS ports in a subset of SRS ports when both TDM and frequency hopping or both TDM and Partial Frequency Probing Based on Resource Blocks (RB) are configured. In some embodiments, when both time division multiplexing and frequency hopping are configured, the same frequency counter is used to determine the frequency domain location for all subsets of SRS ports. Attached Figure Description

[0060] A more comprehensive understanding of the present embodiments and their accompanying advantages and features will be more readily obtained by referring to the following detailed description taken in conjunction with the accompanying drawings, in which: Figure 1 This is an example of SRS resource allocation; Figure 2 This shows SRS transmissions without frequency hopping or repetition. Figure 3 This illustrates an SRS transmission with frequency hopping. Figure 4 This shows SRS transmissions with repetition. Figure 5 This illustrates SRS transmission between two adjacent UL time slots; Figure 6 The diagram shows two and four multiplexed single-port SRS resources; Figure 7 The correlation between cyclically shifted SRS base sequences and their corresponding unshifted base sequences is shown (where the sequence length is 48 samples and the maximum cyclic shift is 8). Figure 8 The correlation between the cyclically shifted SRS base sequence and the corresponding unshifted base sequence, which has been transmitted on the frequency-selective channel, is shown for four equidistant SRS ports. Figure 9 The correlation between the cyclically shifted SRS base sequence and the corresponding unshifted base sequence, which has been transmitted on the frequency-selective channel, is shown for eight equidistant SRS ports. Figure 10 This is a schematic diagram illustrating an example network architecture of a communication system connected to a host computer via an intermediate network according to the principles of this disclosure; Figure 11 This is a block diagram illustrating, according to some embodiments of the present disclosure, how a host computer communicates with a wireless device via a network node through at least a partial wireless connection; Figure 12 This is a flowchart illustrating example methods implemented in a communication system including a host computer, network nodes, and wireless devices for executing client applications on a wireless device, according to some embodiments of the present disclosure; Figure 13 This is a flowchart illustrating example methods implemented in a communication system including a host computer, a network node, and a wireless device for receiving user data at a wireless device, according to some embodiments of the present disclosure. Figure 14 This is a flowchart illustrating an example method implemented in a communication system including a host computer, a network node, and a wireless device for receiving user data from a wireless device at the host computer, according to some embodiments of the present disclosure. Figure 15 This is a flowchart illustrating an example method for receiving user data on a host computer, implemented in a communication system including a host computer, a network node, and a wireless device, according to some embodiments of the present disclosure. Figure 16 This is a flowchart of an example process for time division multiplexing (TDM) of an eight-port sounding reference signal (SRS) in a network node; Figure 17 This is a flowchart of an example process for time division multiplexing (TDM) of an eight-port probe reference signal (SRS) in WD; Figure 18 This is a flowchart of another example process for time division multiplexing (TDM) of an eight-port sounding reference signal (SRS) in a network node; Figure 19 This is a flowchart of another example process for time division multiplexing (TDM) of an eight-port probe reference signal (SRS) in WD; Figure 20 This illustrates an SRS TDM that is repeatedly combined with SRS; Figure 21 This illustrates SRS TDM combined with SRS frequency hopping on two hops; Figure 22 This illustrates SRS TDM combined with SRS frequency hopping on four hops; Figure 23 This is an example of SRS TDM when the number of SRS ports per SRS symbol subset is 4, the number of SRS symbols is 8, the repetition factor is 4, and in-slot frequency hopping is not configured; and Figure 24 This illustrates an SRS TDM that employs alternative mapping and combines it with SRS frequency hopping on two hops. Detailed Implementation

[0061] Before describing the exemplary embodiments in detail, it should be noted that the embodiments primarily involve combinations of device components and processing steps related to time division multiplexing (TDM) of an eight-port probe reference signal (SRS). Therefore, components are indicated in the figures using conventional symbols where appropriate, and only those specific details relevant to understanding these embodiments are shown so as not to obscure this disclosure from details readily apparent to those skilled in the art who will benefit from the description herein. Throughout the description, similar reference numerals refer to similar elements.

[0062] As used herein, relational terms such as “first” and “second,” “top” and “bottom,” etc., are used only to distinguish one entity or element from another, and do not necessarily require or imply any physical or logical relationship or order between such entities or elements. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the concepts described herein. As used herein, unless the context clearly indicates otherwise, the singular forms “a,” “a,” and “the” are intended to include the plural forms as well. It will be further understood that the terms “comprising” and / or “including” as used herein specify the presence of the described 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.

[0063] In the embodiments described herein, connection terms such as “communicating with” can be used to indicate electrical or data communication, which can be achieved, for example, through physical contact, induction, electromagnetic radiation, radio signaling, infrared signaling, or optical signaling. Those skilled in the art will appreciate that multiple components can interoperate, and that modifications and alterations to achieve electrical and data communication are possible.

[0064] In some embodiments described herein, terms such as “coupled” and “connection” may be used herein to refer to a connection (although not necessarily a direct connection) and may include wired and / or wireless connections.

[0065] As used herein, the term "network node" can refer to any type of network node contained within a radio network, which may further include any of the following: base station (BS), radio base station, base transceiver station (BTS), base station controller (BSC), radio network controller (RNC), g node B (gNB), evolved node B (eNB or eNodeB), node B, multi-standard radio (MSR) radio node (such as MSR BS), multi-cell / multicast coordination entity (MCE), integrated access and backhaul (IAB) node, relay node, donor node of control relay, radio access point (AP), transport point, transport node, remote radio unit (RRU), remote radio headend (RRH), core network node (e.g., mobility management entity (MME), ad hoc network (SON) node, coordination node, location node, MDT node, etc.), external node (e.g., third-party node, node outside the current network), node in distributed antenna system (DAS), spectrum access system (SAS) node, component management system (EMS), etc. Network nodes may also include test equipment. The term “radio node” as used in this article can also be used to refer to a wireless device (WD), such as a wireless device (WD) or a radio network node.

[0066] In some embodiments, the non-limiting terms wireless device (WD) or user equipment (UE) may be used interchangeably. A WD as used herein can be any type of wireless device capable of communicating with a network node or another WD via radio signals, such as a wireless device (WD). A WD can also be a radio 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 with a WD, a tablet, a mobile terminal, a smartphone, a laptop embedded device (LEE), a laptop-mounted device (LME), a USB dongle, a client device (CPE), an Internet of Things (IoT) device, or a narrowband IoT (NB-IoT) device, etc.

[0067] Furthermore, in some embodiments, the generic term "radio network node" is used. It can be any kind of radio network node, and it can include any of the following: 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), remote radio headend (RRH).

[0068] Note that while terms from a particular wireless system such as, for example, 3GPP LTE and / or New Radio (NR) may be used in this disclosure, this should not be construed as limiting the scope of this disclosure to the aforementioned systems. Other wireless systems, including but not limited to Wideband Code Division Multiple Access (WCDMA), Global Microwave Access Interoperability (WiMax), Ultra Mobile Broadband (UMB), and Global System for Mobile Communications (GSM), may also benefit from utilizing the concepts covered in this disclosure.

[0069] It should be noted further that the functions described herein as being performed by wireless devices or network nodes can be distributed across multiple wireless devices and / or network nodes. In other words, it is contemplated that the functions of the network nodes and wireless devices described herein are not limited to being performed by a single physical device, and can actually be distributed across several physical devices.

[0070] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It will be further understood that the terms used herein shall be interpreted as having the same meaning as they have in the context of this specification and related art, and shall not be interpreted in an idealized or overly formal sense unless expressly defined herein.

[0071] Some embodiments provide time-division multiplexing (TDM) of an eight-port probe reference signal (SRS).

[0072] Now returning to the accompanying drawings, similar reference numerals refer to similar elements. Figure 10The diagram illustrates a communication system 10 according to an embodiment, such as a 3GPP-type cellular network supporting standards such as LTE and / or NR (5G). It includes an access network 12, such as a radio access network, and a core network 14. The access network 12 includes multiple network nodes 16a, 16b, 16c (collectively referred to as network nodes 16), such as NBs, eNBs, gNBs, or other types of radio access points. Each network node defines a corresponding coverage area 18a, 18b, 18c (collectively referred to as coverage area 18). Each network node 16a, 16b, 16c can be connected to the core network 14 via a wired or wireless connection 20. A first radio device (WD) 22a located in coverage area 18a is configured to wirelessly connect to or be paged by the corresponding network node 16a. A second WD 22b in coverage area 18b can wirelessly connect to the 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 the coverage area or a single WD is connected to the corresponding network node 16. Note that although only two WDs 22 and three network nodes 16 are shown for convenience, the communication system may include many more WDs 22 and network nodes 16.

[0073] Furthermore, it is envisioned that WD 22 can communicate simultaneously with more than one network node 16 and more than one type of network node 16, and / or be configured to communicate separately with these network nodes 16. For example, WD 22 may have dual connectivity with LTE-enabled network nodes 16 and the same or different network nodes 16 that support NR. For instance, WD 22 can communicate with an eNB for LTE / E-UTRAN and a gNB for NR / NG-RAN.

[0074] The communication system 10 itself can be connected to the host computer 24, which can be implemented in the hardware and / or software of a standalone server, a cloud-implemented server, a distributed server, or as a processing resource in a server farm. The host computer 24 can be owned or controlled by a service provider, or can be operated by or on behalf of a service provider. Connections 26, 28 between the communication system 10 and the host computer 24 can extend directly from the core network 14 to the host computer 24, or can extend via an optional intermediate network 30. The intermediate network 30 can be one or a combination of public, private, or takeover networks. The intermediate network 30 (if any) can be a backbone network or the Internet. In some embodiments, the intermediate network 30 may include two or more subnetworks (not shown).

[0075] Figure 10The communication system as a whole enables connectivity between one of the connected WDs 22a and 22b and the host computer 24. This connectivity can be described as an over-the-top (OTT) connection. The host computer 24 and the connected WDs 22a and 22b are configured to transmit data and / or signaling via the OTT connection using access network 12, core network 14, any intermediate network 30, and possible further infrastructure (not shown) as intermediaries. The OTT connection can be transparent in the sense that at least some of the participating communication devices traversed by the OTT connection are unaware of the routing of uplink and downlink communications. For example, it may not be necessary or required to inform network node 16 of past routing of incoming downlink communications containing data originating from host computer 24 to be forwarded (e.g., handed over) to the connected WD 22a. Similarly, network node 16 does not need to know the future routing of uplink communications originating from WD 22a toward host computer 24.

[0076] Network node 16 is configured to include an SRS unit 32, which can be configured to associate a subset of sounding reference signal (SRS) ports with a configured subset of SRS symbols, said association being in one of a sequential mapping mode and a cyclic mapping mode. Alternatively or additionally, SRS unit 32 can be configured by WD 22 to use cyclic mapping parameters for cyclically mapping sounding reference signal (SRS) ports to SRS symbols. Wireless device 22 is configured to include a determination unit 34, which can be configured to determine a subset of SRS symbols based on a received mapping configuration. Alternatively or additionally, determination unit 34 can be configured to cyclically map N subsets of SRS ports to M OFDM symbols.

[0077] Now refer to Figure 11This section describes an example implementation of the WD 22, network node 16, and host computer 24 discussed in the preceding paragraphs, according to an embodiment. In the communication system 10, the host computer 24 includes hardware (HW) 38, which includes a communication interface 40 configured to establish and maintain wired or wireless connections with interfaces to different communication devices of the communication system 10. The host computer 24 further includes processing circuitry 42, which may have storage and / or processing capabilities. Processing circuitry 42 may include a processor 44 and memory 46. In particular, attached to or replacing the processor (such as a central processing unit) and memory, processing circuitry 42 may include integrated circuits for processing and / or control, such as one or more processors and / or processor cores adapted to execute instructions and / or FPGAs (Field-Programmable Gate Arrays) and / or ASICs (Application-Specific Integrated Circuits). Processor 44 may be configured to access (e.g., write to and / or read from) memory 46, which may include any kind 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).

[0078] Processing circuitry 42 may be configured to control any of the methods and / or processes described herein, and / or cause such methods and / or processes to be performed, for example, by host computer 24. Processor 44 corresponds to one or more processors 44 for performing the functions of host computer 24 described herein. Host computer 24 includes memory 46 configured to store data, programming software code, and / or other information described herein. In some embodiments, software 48 and / or host application 50 may include instructions that, when executed by processor 44 and / or processing circuitry 42, cause processor 44 and / or processing circuitry 42 to perform the processes described herein with respect to host computer 24. The instructions may be software associated with host computer 24.

[0079] Software 48 may be executable by processing circuitry 42. Software 48 includes a host application 50. Host application 50 may be operable to provide services to remote users, such as WD 22 connected via an OTT connection 52 terminated between WD 22 and host computer 24. During the provision of services to remote users, host application 50 may provide user data, which is transmitted using OTT connection 52. The “user data” may be data and information described herein for implementing the described functionality. In one embodiment, host computer 24 may be configured to provide control and functionality to a service provider and may be operated by or on behalf of the service provider. Processing circuitry 42 of host computer 24 enables host computer 24 to observe, monitor, control, transmit to and / or receive from network node 16 and / or wireless device 22.

[0080] The communication system 10 further includes a network node 16 disposed within the communication system 10 and including hardware 58 enabling it to communicate with the host computer 24 and with the WD 22. Hardware 58 may include a communication interface 60 for establishing and maintaining wired or wireless connections to different communication devices of the communication system 10, and a radio interface 62 for establishing and maintaining at least a wireless connection 64 with the WD 22 located within the coverage area 18 served by the network node 16. The radio interface 62 may be configured 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. Connection 66 may be direct, or it may be via the core network 14 of the communication system 10 and / or via one or more intermediate networks 30 outside the communication system 10.

[0081] In the illustrated embodiment, the hardware 58 of network node 16 further includes processing circuitry 68. Processing circuitry 68 may include a processor 70 and memory 72. Specifically, attached to or replacing the processor (such as a central processing unit) and memory, processing circuitry 68 may include integrated circuits for processing and / or control, such as one or more processors and / or processor cores adapted to execute instructions and / or FPGAs (Field-Programmable Gate Arrays) and / or ASICs (Application-Specific Integrated Circuits). Processor 70 may be configured to access (e.g., write to and / or read from) memory 72, which may include any kind 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).

[0082] Therefore, network node 16 further includes software 74, which is internally stored, for example, in memory 72, or stored in external memory (e.g., a database, storage array, network storage device, etc.) accessible to network node 16 via an external connection. Software 74 may be executable by processing circuitry 68. Processing circuitry 68 may be configured to control any of the methods and / or processes described herein, and / or cause such methods and / or processes to be performed, for example, by network node 16. Processor 70 corresponds to one or more processors 70 for performing the functions of network node 16 described herein. Memory 72 is configured to store data, programming software code, and / or other information described herein. In some embodiments, software 74 may include instructions that, when executed by processor 70 and / or processing circuitry 68, cause processor 70 and / or processing circuitry 68 to perform the processes described herein with respect to network node 16. For example, the processing circuitry 68 of network node 16 may include an SRS unit 32, which may be configured to associate a subset of probe reference signal SRS ports with a configured subset of SRS symbols, said association being in one of a sequential mapping mode and a cyclic mapping mode. Alternatively or additionally, SRS unit 32 may be configured, as configured by WD 22, to cyclically map probe reference signal SRS ports to SRS symbols using cyclic mapping parameters.

[0083] The communication system 10 further includes the already mentioned WD 22. The WD 22 may have hardware 80, which may include a radio interface 82 configured to establish and maintain a wireless connection 64 with a network node 16 serving the coverage area 18 where the WD 22 is currently located. The radio interface 82 may be configured as or may include, for example, one or more RF transmitters, one or more RF receivers, and / or one or more RF transceivers.

[0084] The hardware 80 of the WD 22 further includes processing circuitry 84. Processing circuitry 84 may include a processor 86 and memory 88. Specifically, attached to or replacing the processor (such as a central processing unit) and memory, processing circuitry 84 may include integrated circuits for processing and / or control, such as one or more processors and / or processor cores adapted to execute instructions and / or FPGAs (Field-Programmable Gate Arrays) and / or ASICs (Application-Specific Integrated Circuits). Processor 86 may be configured to access (e.g., write to and / or read from) memory 88, which may include any kind 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).

[0085] Therefore, WD 22 may further include software 90, which is stored, for example, in memory 88 at WD 22, or in external memory accessible to WD 22 (e.g., a database, storage array, network storage device, etc.). Software 90 may be executable by processing circuitry 84. Software 90 may include a client application 92. Client application 92 may be operable to provide services to human or non-human users via WD 22 with the support of host computer 24. In host computer 24, a host application 50 is executing and may communicate with the executing client application 92 via an OTT connection 52 terminated between WD 22 and host computer 24. During service provision to a user, client application 92 may receive request data from host application 50 and provide user data in response to the request data. OTT connection 52 may transmit both request data and user data. Client application 92 may interact with the user to generate the user data it provides.

[0086] Processing circuitry 84 may be configured to control any of the methods and / or processes described herein, and / or cause such methods and / or processes to be performed, for example, by WD 22. Processor 86 corresponds to one or more processors 86 for performing the functions of WD 22 described herein. WD 22 includes memory 88 configured to store data, programming software code, and / or other information described herein. In some embodiments, software 90 and / or client application 92 may include instructions that, when executed by processor 86 and / or processing circuitry 84, cause processor 86 and / or processing circuitry 84 to perform the processes described herein with respect to WD 22. For example, processing circuitry 84 of wireless device 22 may include a determining unit 34 that determines a subset of SRS symbols based on a received mapping configuration. Alternatively or additionally, determining unit 34 may be configured to cyclically map N subsets of SRS ports to M OFDM symbols.

[0087] In some embodiments, the internal operations of network node 16, WD 22, and host computer 24 can be as follows: Figure 11 As shown, and independently, the surrounding network topology can be Figure 10 That way.

[0088] exist Figure 11The OTT connection 52 has been abstractly depicted to illustrate communication between host computer 24 and wireless device 22 via network node 16, without explicitly mentioning any intermediate devices or the exact routing of messages via these devices. The network infrastructure can determine the routing, which can be configured to be hidden from WD 22, the service provider operating host computer 24, or both. When OTT connection 52 is active, the network infrastructure can make further decisions (e.g., based on load balancing considerations or network reconfiguration), through which it dynamically changes the routing.

[0089] The wireless connection 64 between WD 22 and network node 16 is based on the teachings of embodiments described throughout this disclosure. One or more embodiments in various embodiments improve the performance of OTT services provided to WD 22 using OTT connection 52, in which wireless connection 64 may form the final segment. More specifically, the teachings of some embodiments in these embodiments can improve data rates, latency, and / or power consumption, and thereby provide benefits such as reduced user wait times, relaxed file size limits, better responsiveness, extended battery life, and so on.

[0090] In some embodiments, a measurement process may be provided for the purpose of monitoring data rates, latency, and other factors that improve upon one or more of these embodiments. Optional network functionality may further exist for reconfiguring the OTT connection 52 between host computer 24 and WD 22 in response to changes in measurement results. The measurement process and / or the network functionality for reconfiguring the OTT connection 52 may be implemented in software 48 of host computer 24 or software 90 of WD 22, or both. In embodiments, sensors (not shown) may be deployed in or associated with communication devices through which the OTT connection 52 passes; the sensors may participate in the measurement process by supplying values ​​of the monitored quantities exemplified above or values ​​of other physical quantities (based on which software 48, 90 may calculate or estimate the monitored quantities). Reconfiguration of the OTT connection 52 may include message formats, retransmission settings, preferred routing, etc.; reconfiguration does not need to affect network node 16, and it may be unknown or imperceptible to network node 16. Some of these processes and functionalities may be known and practiced in the art. In some embodiments, the measurement may involve proprietary WD signaling, which enables the host computer 24 to measure throughput, propagation time, latency, etc. In some embodiments, the measurement is made possible because the software 48, 90 causes messages (especially empty or 'fake' messages) to be transmitted using the OTT connection 52 while it monitors propagation time, errors, etc.

[0091] Therefore, in some embodiments, the host computer 24 includes processing circuitry 42 configured to provide user data and a communication 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 radio interface 62. In some embodiments, the network node 16 is configured and / or the processing circuitry 68 of the network node 16 is configured to perform the functions and / or methods described herein for preparing / initiating / maintaining / supporting / terminating transmissions to the WD 22, and / or preparing / terminating / maintaining / supporting / terminating transmissions received from the WD 22.

[0092] In some embodiments, host computer 24 includes processing circuitry 42 and a communication interface 40, the communication interface 40 being configured to receive user data originating from transmissions from WD 22 to network node 16. In some embodiments, WD 22 is configured, and / or includes radio interface 82 and / or processing circuitry 84, the processing circuitry 84 being configured to perform the functions and / or methods described herein for preparing / initiating / maintaining / supporting / terminating transmissions to network node 16, and / or preparing / terminating / maintaining / supporting / terminating transmissions received from network node 16.

[0093] Although Figure 10 and Figure 11 Various "units," such as SRS unit 32 and determination unit 34, are shown as residing within the respective processors; however, it is contemplated that these units can be implemented such that a portion of the unit is stored in a corresponding memory within the processing circuitry. In other words, these units can be implemented in hardware, or in a combination of hardware and software within the processing circuitry.

[0094] Figure 12 This illustrates an embodiment of a communication system (such as, for example...) Figure 10 and Figure 11 The flowchart illustrates an example method implemented in a communication system. The communication system may include a host computer 24, a network node 16, and a WD 22, which may be referenced... Figure 11The methods described herein. In the first step, host computer 24 provides user data (block S100). In an optional sub-step of the first step, host computer 24 provides user data by executing a host application (such as, for example, host application 50) (block S102). In the second step, host computer 24 initiates a transmission carrying user data to WD 22 (block S104). In an optional third step, in accordance with the teachings of the embodiments described throughout this disclosure, network node 16 transmits the user data already carried in the transmission initiated by host computer 24 to WD 22 (block S106). In an optional fourth step, WD 22 executes a client application associated with host application 50 executed by host computer 24, such as, for example, client application 92 (block S108).

[0095] Figure 13 This illustrates an embodiment of a communication system (such as, for example...) Figure 10 The flowchart illustrates an example method implemented in a communication system. The communication system may include a host computer 24, a network node 16, and a WD 22, which may be referenced... Figure 10 and Figure 11 The methods described herein. In the first step, host computer 24 provides user data (block S110). In an optional sub-step (not shown), host computer 24 provides user data by executing a host application (such as, for example, host application 50). In the second step, host computer 24 initiates a transmission carrying user data to WD 22 (block S112). According to the teachings of the embodiments described throughout this disclosure, the transmission may be made via network node 16. In an optional third step, WD 22 receives the user data carried in the transmission (block S114).

[0096] Figure 14 This illustrates an embodiment of a communication system (such as, for example...) Figure 10 The flowchart illustrates an example method implemented in a communication system. The communication system may include a host computer 24, a network node 16, and a WD 22, which may be referenced... Figure 10 and Figure 11The methods described herein. In an optional first step, WD 22 receives input data provided by host computer 24 (block S116). In an optional sub-step of the first step, WD 22 executes client application 92, which responds to the received input data provided by host computer 24 to provide user data (block S118). Additionally or alternatively, in an optional second step, WD 22 provides user data (block S120). In an optional sub-step of the second step, WD provides user data by executing a client application (such as, for example, client application 92) (block S122). During the provision of user data, the executed client application 92 may further consider user input received from the user. Regardless of the specific manner in which user data has been provided, in an optional third sub-step, WD 22 may initiate the transmission of user data to host computer 24 (block S124). In a fourth step of the method, in accordance with the teachings of the embodiments described throughout this disclosure, host computer 24 receives user data transmitted from WD 22 (block S126).

[0097] Figure 15 This illustrates an embodiment of a communication system (such as, for example...) Figure 10 The flowchart illustrates an example method implemented in a communication system. The communication system may include a host computer 24, a network node 16, and a WD 22, which may be referenced... Figure 10 and Figure 11 The methods described herein. In an optional first step, network node 16 receives user data from WD 22 in accordance with the teachings of the embodiments described throughout this disclosure (block S128). In an optional second step, network node 16 initiates a transmission of the received user data to host computer 24 (block S130). In a third step, host computer 24 receives the user data carried in the transmission initiated by network node 16 (block S132).

[0098] Figure 16 This is a flowchart of an example process for time-division multiplexing (TDM) of an eight-port sounding reference signal (SRS) in network node 16. One or more blocks described herein can be performed by one or more elements of network node 16, such as processing circuitry 68 (including SRS unit 32), processor 70, radio interface 62, and / or communication interface 60. Network node 16 is configured to associate a subset of sounding reference signal SRS ports with a configured subset of SRS symbols, such as via processing circuitry 68 and / or processor 70 and / or radio interface 62 and / or communication interface 60, said association being in one of a sequential mapping mode and a cyclic mapping mode (block S134).

[0099] In some embodiments, SRS ports in a subset of SRS ports are mapped to comb offsets and cyclic shifts according to mapping rules. In some embodiments, the same set of comb offsets and cyclic shifts is used for all subsets of a plurality of SRS port subsets. In some embodiments, the same set of comb offsets and cyclic shifts on all subsets of a plurality of SRS port subsets is used for SRS resources not configured with Time Division Multiplexing (TDM). In some embodiments, one of the sequential mapping mode and the cyclic mapping mode is configured by Radio Resource Control (RRC) for each of the plurality of SRS resources. In some embodiments, when both TDM and frequency hopping are configured, multiple SRS ports of a subset of SRS ports are probed before frequency hopping. In some embodiments, all SRS ports of a subset of SRS ports are probed within the time slot of an SRS transmission. In some embodiments, when both TDM and frequency hopping are configured, the same frequency hopping counter is used for all subsets of SRS ports to determine the frequency domain location.

[0100] Figure 17 This is a flowchart of an example process for time-division multiplexing (TDM) of an eight-port Sounding Reference Signal (SRS) in the WD 22. One or more blocks described herein can be performed by one or more elements of the WD 22, such as processing circuitry 84 (including determination unit 34), processor 86, and / or radio interface 82. The WD 22 is configured, for example via processing circuitry 84 and / or processor 86 and / or radio interface 82, to receive one of a sequential mapping mode and a cyclic mapping mode for associating a subset of Sounding Reference Signal SRS ports with a configured subset of SRS symbols (block S136). The process also includes determining a subset of SRS symbols based on the received configuration (block S138). In some embodiments, this configuration is received on Radio Resource Control (RRC) signaling.

[0101] Figure 18This is a flowchart of an example process for time division multiplexing (TDM) of an eight-port sounding reference signal (SRS) in network node 16. One or more blocks described herein can be performed by one or more elements of network node 16, such as processing circuitry 68 (including SRS unit 32), processor 70, radio interface 62, and / or communication interface 60. Network node 16 is configured, for example via processing circuitry 68 and / or processor 70 and / or radio interface 62 and / or communication interface 60, to configure WD 22 with cyclic mapping parameters for cyclically mapping sounding reference signal SRS ports to SRS symbols, the cyclic mapping parameters including the number N of SRS port subsets and the number M of orthogonal frequency division multiplexing (OFDM) symbols to which these SRS port subsets are cyclically mapped (block S140). The method also includes configuring WD 22 to perform SRS transmission according to the cyclic mapping (block S142).

[0102] According to one aspect, in some embodiments, the number of SRS ports in the subset of N subsets of SRS ports is a ratio. This ratio represents the number of SRS ports per SRS symbol subset when Time Division Duplex (TDM) is configured, where This indicates the number of SRS ports for each SRS resource, and F TDM It is a TDM factor equal to N. In some embodiments, when TDM is configured, F TDM It equals 2, otherwise, F TDM Equals 1. In some embodiments, only the ratio is configured to be obtained. Integer and F TDM The combination, in which It is equal to M and is configured by Radio Resource Control (RRC). In some embodiments, the ratio is allowed only if the SRS resource is configured with one or more of repetition, frequency hopping, and RPFS. Greater than 1. In some embodiments, when the ratio If it is not an integer, then it is less than the ratio. The nearest integer is the number of SRS symbols in each subset of SRS ports. In some embodiments, when the ratio... When the value is not an integer, the number of symbols in each SRS port subset varies across the N SRS port subsets. In some embodiments, when the ratio... When the values ​​are not integers, the number of symbols and the number of SRS ports for each SRS port subset vary across the N port subsets. In some embodiments, when the ratio... If the value is greater than 1 and repetition, frequency hopping, and RPFS are not configured, then in Each subset of SRS symbols is repeated within a subset of OFDM symbols. One SRS port. In some embodiments, the method includes: configuring the WD 22 to operate on multiple consecutive SRS ports. F TDM Transmitted in each set of symbols Repeating of SRS ports. In some embodiments, the method includes: configuring WD 22 to detect SRS ports when both TDM and frequency hopping or both TDM and resource block-based partial frequency detection (RPFS) are configured. In some embodiments, each subset of SRS ports occupies the same set of comb offset and cyclic shift (CS). In some embodiments, the comb offset for the antenna port is at least partially based on a ratio. In some embodiments, the cyclic shift for the antenna port is at least partially based on a ratio. In some embodiments, when the 8-port SRS resource is configured with both TDM and cyclic shift frequency hopping, or with both TDM and comb offset frequency hopping, then it is used for a quantity of The frequency hopping mode for each subset of the SRS ports is used for Same frequency hopping mode for port SRS resources.

[0103] Figure 19 This is a flowchart of an example process for time division multiplexing (TDM) of an eight-port sounding reference signal (SRS) in WD 22. One or more blocks described herein can be performed by one or more elements of WD 22, such as processing circuitry 84 (including determination unit 34), processor 86, and / or radio interface 82. WD 22 is configured, for example via processing circuitry 84 and / or processor 86 and / or radio interface 82, to receive from network node 16 cyclic mapping parameters for cyclically mapping sounding reference signal SRS ports to SRS symbols, the cyclic mapping parameters including the number N of SRS port subsets and the number M of orthogonal frequency division multiplexing (OFDM) symbols to which these SRS port subsets are cyclically mapped (block S144). The method also includes cyclically mapping N SRS port subsets to M OFDM symbols (block S146). The method further includes performing SRS transmission according to the cyclic mapping (block S148).

[0104] Accordingly, in some embodiments, the number of SRS ports in the subset of N subsets of SRS ports is a ratio. This ratio represents the number of SRS ports per SRS symbol subset when Time Division Duplex (TDM) is configured, where This indicates the number of SRS ports for each SRS resource, and F TDMIt is a TDM factor equal to N. In some embodiments, the method includes: in multiple consecutive F TDM Transmitted in each set of symbols The method involves detecting SRS ports within a subset of SRS ports when both TDM and frequency hopping or both TDM and Partial Frequency Probing Based on Resource Blocks (RBs) are configured. In some embodiments, when both TDM and frequency hopping are configured, the same frequency counter is used to determine the frequency domain location for all subsets of SRS ports.

[0105] The general process flow of the arrangements of this disclosure has been described, and examples of hardware and software arrangements for implementing the processes and functions of this disclosure have been provided. The following sections provide details and examples of arrangements for time division multiplexing (TDM) of an eight-port probe reference signal (SRS).

[0106] Split the SRS port into the OFDM symbol. Consider how to split the SRS port into OFDM symbols for an 8-port SRS resource configured with TDM.

[0107] In the following text, Indicates the number of SRS symbols configured in the RRC (in existing NR specifications, such as 3GPP TS 38.211, the number of SRS symbols is used). ).also, This indicates the (maximum) number of SRS ports per SRS symbol subset when TDM is configured. Here, This refers to the number of SRS ports for each SRS resource, and F TDM It is the "TDM factor" (note that the 3GPP specification may use a different term for this parameter instead of "TDM factor").

[0108] In later embodiments, parameters will be used. F TDM To export the comb offset and CS allocation for SRS resources configured with TDM.

[0109] In some embodiments, if, for example, via a higher-level parameter as shown in the following example denoted by ASN... timeDivisionDuplexing-r18 If TDM is configured, then F TDM =2, otherwise, F TDM =1.

[0110] In some embodiments, the field is only active when the number of SRS ports in the SRS resource is set to 8. timeDivisionDuplexing-r18 Only then do they exist, for example, as described in Table 2.

[0111] Table 2 timeDivisionDuplexing-r18 field The conditions exist.

[0112] In some embodiments, if TDM is configured, then One of them, otherwise F TDM =1. Here, F TDM The value can be configured explicitly (e.g., as in the following example represented in Abstract Syntax Notation (ASN)) or can be implicitly derived based on other SRS configuration parameters (e.g., based on the number of SRS symbols configured for each SRS resource).

[0113] Some embodiments In the following embodiments, for those configured with TDM and a symbol Port SRS resources will be configured for the aforementioned Symbol set of port SRS resources The non-overlapping subsets of the transmission from the set of An orthogonal subset of SRS ports.

[0114] In some embodiments, the only allowed RRC configuration and F TDM The combination is to arrive at Those combinations that are integers.

[0115] In some embodiments, SRS resources are allowed only if they are configured with one or more of repeating, frequency hopping, or RPFS. .

[0116] In some embodiments, for example, for and F TDM =2, when TDM is configured, only supports (i.e., not supported) ).

[0117] In some embodiments, if And if repetition, frequency hopping, or RPFS is not configured, then each SRS symbol subset Each SRS port will be Repeating within a series of consecutive OFDM symbols. In other words, in some embodiments, if SRS TDM is configured, it is not necessary to explicitly configure SRS repetition.

[0118] Sequence Mapping In some embodiments, in SRS symbol Transmitting SRS port In SRS symbol Transmitting SRS port ,etc.

[0119] Figure 20 This illustrates an example of an SRS TDM according to the above embodiment (using sequential mapping), used when the number of SRS ports for each subset of SRS symbols is (Right now, and F TDM =2), the number of SRS symbols is The repetition factor is R =4, and the case where frequency hopping within a time slot is not configured. Figure 20 The diagram shows an SRS TDM that is repeatedly combined with SRS. Here, p0, p1, ..., p7 are SRS ports.

[0120] In some embodiments, when both TDM and frequency hopping are configured, the same frequency hopping counter is used to determine the frequency domain location for all subsets of SRS ports.

[0121] In some embodiments, when both TDM and frequency hopping are configured, for ap-SRS, all SRS ports within a subset of SRS ports can be probed during the time slot in which SRS is transmitted.

[0122] Figure 21 An example of SRS TDM according to the above embodiment is shown, used when the number of SRS ports for each subset of SRS symbols is (Right now, and F TDM =2), the number of SRS symbols is The repetition factor is R =2, and configured the case of frequency hopping within the time slot on both hops. Figure 21 The diagram shows an SRS TDM combination with SRS frequency hopping on two hops (for each subset of ports). Here, p0, p1, ..., p7 are SRS ports.

[0123] Figure 22 This is an example of SRS TDM according to the above embodiments, used when the number of SRS ports in each SRS symbol subset is (Right now, and F TDM =2), the number of SRS symbols is The repetition factor is R =1, and configured the case for frequency hopping within a time slot on a four-hop network. Figure 22 In this context, SRS TDM is combined with SRS frequency hopping on four hops (for each port subset). Here, p0, p1, ..., p7 are SRS ports.

[0124] Circular mapping Using the above methods (for example, using Figure 22 The advantage of the above method is that CSI can be obtained for each subset of SRS ports with the minimum time interval between the first and last transmission times of the same SRS port, which mitigates the channel aging effect. The disadvantage of this method is that frequency hopping can cause phase discontinuities, and therefore, network node 16 may measure the phase shift between the first and second SRS port sets without being able to determine whether this phase shift is caused by the channel or by frequency hopping.

[0125] In an alternative embodiment, if repetition is configured but both frequency hopping and RPFS are not configured, then An orthogonal subset of each SRS port will be transmitted in a cyclic manner, for example, as follows: In SRS symbol Transmitting SRS port In SRS symbol Transmitting SRS port In SRS symbol Transmitting SRS port etc.

[0126] In SRS symbol ...transmitting the nth SRS port Orthogonal sets .

[0127] In some embodiments, in the first F TDM All are transmitted in each symbol One SRS port, in the following F TDM All are transmitted in each symbol The second repetition of the SRS port, and so on. If the first transmit-receive point (TRP) with good coverage of the WD 22 is probing the SRS transmitted by the WD 22, the first TRP can only measure the first FTDM All of the symbols One SRS port and the quality is good enough that there is no need to measure the rest of the duplicates. On the other hand, if a second TRP with poor coverage for WD 22 is probing the SRS transmitted by WD 22, the second TRP can measure all Multiple repetitions of an SRS port are used to improve the estimated channel quality on the SRS.

[0128] Figure 23 An example of SRS TDM according to the above alternative embodiments is shown, used when the number of SRS ports for each subset of SRS symbols is (Right now, and F TDM =2), the number of SRS symbols is The repetition factor is R =4, and the case where in-slot frequency hopping is not configured. In Figure 23 In the alternative embodiments, SRS TDM and SRS are repeatedly combined. Here, p0, p1, ..., p7 are SRS ports.

[0129] In some embodiments, when both TDM and frequency hopping (or RPFS) are configured, all SRS ports can be probed before frequency hopping. (For...) Figure 21 The same configuration in the mode Figure 24 This strategy is shown in the image. Figure 24 The diagram shows the SRS frequency hopping on two hops (for each subset of ports) and the SRS TDM combined with alternative mappings. Here, p0, p1, ..., p7 are SRS ports.

[0130] RRC configuration for mapping modes (sequential mapping or circular mapping) In some embodiments, the time-domain mapping mode (i.e., sequential mapping or cyclic mapping) can be configured for RRC on a per-SRS resource basis, for example, as follows (denoted by ASN): Other aspects In some embodiments, if and F TDM The RRC configuration value makes If it is not an integer, then only The symbol will contain SRS (e.g., lastly) (The symbol does not contain SRS). As before, map the subset of SRS ports to the occupied ones. A non-overlapping subset of symbols.

[0131] In some embodiments, if and F TDM The RRC configuration value makes If it is not an integer, the number of symbols in each SRS port subset can vary among these SRS port subsets.

[0132] In some embodiments, if and F TDM The RRC configuration value makes If the number of symbols and the number of SRS ports are not integers, then the number of symbols and the number of SRS ports in each SRS port subset can vary within those SRS port subsets.

[0133] Alternative embodiments In some embodiments, a TDM factor is configured. F TDM and The SRS resources of each symbol will span the total One symbol. In other words, the traditional (in the existing NR specification) parameters. The number of OFDM symbols is reinterpreted for each subset of SRS ports.

[0134] In some embodiments, for the nth SRS port subset ( The starting symbol position is ,in l 0 is the starting position for SRS resources configured in RRC.

[0135] In some embodiments, the starting position can be explicitly configured in the RRC for each subset of SRS ports.

[0136] Mapping of SRS port subsets to comb offset and CS Next, consider how to assign comb offsets and CS to each port in the SRS port subset.

[0137] In some embodiments, when the SRS resource is configured with TDM, the traditional RRC field is used to configure comb offset and cyclic shift. Specifically, higher-level parameters transmissionComb Used for conveying combs 2 and 4, and transmissionComb-n8-r17 Used for transmission comb 8. To support this behavior, the traditional SRS port to CS and SRS port to comb offset formulas need to be modified, for example, as follows.

[0138] In some embodiments, the same set of comb offsets and CS is used for 8-port SRS resources, regardless of whether TDM is configured. This implies that the set of comb offsets and CS is different for different subsets of SRS ports.

[0139] In some embodiments, each subset of SRS ports occupies the same set of comb offsets and CS, which simplifies the co-scheduling of other SRS resources in the same time / frequency resource set.

[0140] In the following, we consider some example embodiments, assuming that the first subset of SRS ports is The second SRS port subset is ,etc.

[0141] Specifically, for and F TDM =2, SRS port In the first subset, and .

[0142] For antenna port p i CS It is given by the following formula: .

[0143] here, It is the maximum number of cyclic shifts per comb offset, and It is given by the following formula: .

[0144] here, It is a cyclic shift configured by RRC (included in higher-level parameters). transmissionComb middle). Notice, =6 is equivalent to transmission comb 8 being configured.

[0145] Note that, according to the previous embodiment, if TDM is not configured, then F TDM =1, and the above formula simplifies to the traditional port-to-CS formula.

[0146] For antenna port p i comb offset It is given by the following formula: .

[0147] here, It is the comb offset configured by RRC (included in higher-level parameters). transmissionComb (in the middle), and .

[0148] Note that, according to the previous embodiment, if TDM is not configured, then F TDM =1, and the above formula simplifies to the traditional port-to-comb offset formula.

[0149] Extend For SRS in NR 3GPP Rel-18, cyclic shift and / or comb offset hopping will be supported, which requires updated formulas for mapping SRS ports to comb offset and cyclic shift. Frequency hopping modes and formulas for mapping SRS ports to comb offset and cyclic shift are available. In some embodiments, when an 8-port SRS resource is configured with both TDM and cyclic shift and / or comb offset frequency hopping, the following is used... P The frequency hopping mode and formula for each subset of SRS ports can be used with... P The frequency hopping mode is the same for the port SRS resources.

[0150] Some embodiments may include one or more of the following embodiments: Example A1. A network node configured to communicate with a wireless device (WD), the network node being configured to, and / or include a radio interface and / or include processing circuitry and being configured to: The probe reference signal (SRS) port subset is associated with the configured SRS symbol subset, and the association is performed in one of the sequential mapping mode and the cyclic mapping mode.

[0151] Example A2. The network node of Example A1, wherein the SRS ports in the SRS port subset are mapped to comb offsets and cyclic shifts according to the mapping rules.

[0152] Example A3. The network node of Example A2, wherein the same set of comb offset and cyclic shift is used for all subsets of multiple SRS port subsets.

[0153] Example A4. The network node of Example A3, wherein the same set of comb offsets and cyclic shifts on all subsets of multiple SRS port subsets are used for SRS resources that are not configured with time-division duplex (TDM).

[0154] Example A5. A network node of any of the examples A1-A4, wherein the Radio Resource Control (RRC) is configured with one of a sequential mapping mode and a circular mapping mode for each of the plurality of SRS resources.

[0155] Example A6. A network node of any of Examples A1-A5, wherein, when both Time Division Multiplexing (TDM) and frequency hopping are configured, multiple SRS ports of a subset of SRS ports are probed before frequency hopping.

[0156] Example A7. The network node of Example A6, wherein all SRS ports of a subset of SRS ports are probed within the time slot of SRS transmission.

[0157] Example A8. A network node in any of Examples A1-A7, wherein when both Time Division Multiplexing (TDM) and frequency hopping are configured, the same frequency hopping counter is used to determine the frequency domain location for all SRS port subsets.

[0158] Example B1. A method implemented in a network node, the method comprising: The probe reference signal (SRS) port subset is associated with the configured SRS symbol subset, and the association is performed in one of the sequential mapping mode and the cyclic mapping mode.

[0159] Example B2. The method of Example B1, wherein SRS ports in a subset of SRS ports are mapped to comb offsets and cyclic shifts according to mapping rules.

[0160] Example B3. The method of Example B2, wherein the same set of comb offsets and cyclic shifts is used for all subsets of multiple SRS port subsets.

[0161] Example B4. The method of Example B3, wherein the same set of comb offsets and cyclic shifts on all subsets of multiple SRS port subsets are used for SRS resources that are not configured with time-division duplex TDM.

[0162] Example B5. A method of any of the embodiments B1-B4, wherein, for each of a plurality of SRS resources, the Radio Resource Control (RRC) is configured with one of a sequential mapping mode and a cyclic mapping mode.

[0163] Example B6. The method of any of the embodiments B1-B5, wherein, when both time division multiplexing (TDM) and frequency hopping are configured, multiple SRS ports of a subset of SRS ports are probed before frequency hopping.

[0164] Example B7. The method of Example B6, wherein all SRS ports of a subset of SRS ports are probed within the time slot of SRS transmission.

[0165] Example B8. The method of any of the examples B1-B7, wherein when both time division multiplexing (TDM) and frequency hopping are configured, the same frequency hopping counter is used to determine the frequency domain location for all SRS port subsets.

[0166] Example C1. A wireless device configured to communicate with a network node, wherein the WD is configured to, and / or includes a radio interface and / or includes processing circuitry and is configured to: Receive configuration for associating a subset of probe reference signal SRS ports with a configured subset of SRS symbols, either a sequential mapping mode or a cyclic mapping mode; and The subset of SRS symbols is determined at least in part based on the received mapping configuration.

[0167] Example C2. The WD of Example C1, wherein the configuration is received on Radio Resource Control (RRC) signaling.

[0168] Example D1. A method in a wireless device configured to communicate with a network node, the method comprising: Receive configuration for associating a subset of probe reference signal SRS ports with a configured subset of SRS symbols, either a sequential mapping mode or a cyclic mapping mode; and The subset of SRS symbols is determined at least in part based on the received mapping configuration.

[0169] Example D2. The method of Example D1, wherein the configuration is received on Radio Resource Control (RRC) signaling.

[0170] As those skilled in the art will appreciate, the concepts described herein can be implemented as methods, data processing systems, computer program products, and / or computer storage media storing executable computer programs. Therefore, the concepts described herein can take the form of all-hardware embodiments, all-software embodiments, or embodiments combining software and hardware aspects, all of which are generally referred to herein as “circuit” or “module.” Any process, step, action, and / or functionality described herein can be performed by, and / or associated with, a corresponding module, which can be implemented in software and / or firmware and / or hardware. Furthermore, this disclosure can take the form of a computer program product on a tangible, computer-usable storage medium, in which computer program code is implemented and executable by a computer. Any suitable tangible, computer-readable medium can be utilized, including hard disks, CD-ROMs, electronic storage devices, optical storage devices, or magnetic storage devices.

[0171] This document describes several embodiments with reference to flowchart illustrations and / or block diagrams of methods, systems, and computer program products. It will be understood that each block in 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 (thus creating a special-purpose computer), a special-purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create components for implementing the function / action specified in one or more blocks of the flowchart illustrations and / or block diagrams.

[0172] These computer program instructions may also be stored in a computer-readable storage medium or storage medium, thereby directing a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of art comprising instruction components that implement the functions / actions specified in one or more boxes of a flowchart and / or block diagram.

[0173] Computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the function / action specified in one or more boxes of a flowchart and / or block diagram.

[0174] It is important to understand that the functions / actions annotated in the boxes may not occur in the order annotated in the operation diagram. For example, depending on the functions / actions involved, two boxes shown successively may actually be executed substantially simultaneously, or these boxes may sometimes be executed in reverse order. Although some diagrams include arrows on the communication path to indicate the main communication direction, it is important to understand that communication may occur in the opposite direction to the direction depicted by the arrows.

[0175] Computer program code used to perform the operations of the concepts described herein may be written in an object-oriented programming language such as Python, Java®, or C++. However, computer program code used to perform the operations of this disclosure may also be written in a conventional procedural programming language such as the "C" programming language. The program code may be executed entirely on the user's computer, partially on the user's computer, as a standalone 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 may be connected to the user's computer via a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider via the Internet).

[0176] Numerous different embodiments have been disclosed herein in conjunction with the foregoing description and accompanying drawings. It will be understood that a literal description and illustration of every combination and sub-combination of these embodiments would be excessively repetitive and obscure. Therefore, all embodiments can be combined in any manner and / or combination, and this specification, including the accompanying drawings, should be considered as constituting a complete written description of all combinations and sub-combinations of the embodiments described herein, as well as the ways and processes of making and using them, and should support the claims for any such combinations or sub-combinations.

[0177] The abbreviations that may be used in the preceding description include: Explanation of abbreviations 3GPP Third Generation Partner Program ap-SRS (Aperiodic SRS) ASN Abstract Syntax Notation BPSK (Binary Phase Shift Keying) BWP bandwidth portion CA carrier aggregation CB codebook CDM (Code Division Multiplexing) CE control elements CP-OFDM Cyclic Prefix OFDM CRB carrier RB CG configuration approved CS cyclic shift CS-RNTI Configuration and Scheduling of RNTI CSI Channel State Information DCI Downlink Control Information DFT (Discrete Fourier Transform) DFT-S-OFDM, DFT extended OFDM DG Dynamic Approval DL downlink DMRS demodulation RS FD-OCC Frequency Domain OCC FDD (Frequency Division Multiplexing) FR1 Frequency range 1 FR2 frequency range 2 IDFT inverse DFT gNB gNodeB IE Information Elements LSB (Least Significant Bit) LTE Long Term Evolution MAC Media Access Control MCS modulation and coding scheme MIB Master Information Block MIMO (Multiple Input Multiple Output) MSB Most significant bit NCB Non-Codebook NDI New Data Indicator NR New Radio NW Network OCC Orthogonal Cover Code OFDM (Orthogonal Frequency Division Multiplexing) p-SRS Periodic SRS PA power amplifier PAPR (Peak to Mean Power Ratio) PC power control PCell Main Cell PDCCH (Physical Downlink Control Channel) PDSCH (Physical Downlink Shared Channel) PRB Physical RB PSD power spectral density PTRS phase tracking reference signal PUCCH (Physical Uplink Control Channel) PUSCH Physical Uplink Shared Channel QPSK (Quadrature Phase Shift Keying) RB resource block RBG resource block group RE Resource Elements RF (Radio Frequency) RPFS RB-level partial frequency detection RS reference signal RSRP RS Receive Power RIV resource indicator value RNTI (Radio Network Temporary Identifier) RRC Radio Resource Control RV Redundant Version Rx Receive SCS Subcarrier Spacing SCell auxiliary cell SIB1 System Information Block 1 SLIV start and length indicator values sp-SRS (semi-permanent SRS) SNR (Signal-to-Noise Ratio) SRI SRS resource indicator SRS Detection Reference Signal SRSI SRS resource set indicator SSB Synchronization Signal Block SUL supplementary uplink TB transfer block TD-OCC Time Domain OCC TDD (Time Division Duplex) TDM (Time Division Multiplexing) Tx transfer UE User Equipment UL uplink VRB (Virtual RB)

[0178] Those skilled in the art will appreciate that the embodiments described herein are not limited to those specifically shown and described above. Furthermore, unless otherwise stated above, it should be noted that all drawings are not to scale. In view of the foregoing teachings, various modifications and alterations are possible without departing from the scope of the appended claims.

Claims

1. A method in a network node (16) configured to communicate with a wireless device WD (22), the method comprising: The WD (22) is configured (S140) with cyclic mapping parameters for cyclically mapping the probe reference signal SRS ports to SRS symbols, the cyclic mapping parameters including the number N of SRS port subsets and the number M of orthogonal frequency division multiplexing (OFDM) symbols to which the SRS port subsets are cyclically mapped; as well as Configure the WD (22) (S142) to perform SRS transmission according to the cyclic mapping.

2. The method as described in claim 1, wherein, The number of SRS ports in the N subsets is a ratio. The ratio represents the number of SRS ports per SRS symbol subset when Time Division Duplex (TDM) is configured, where This indicates the number of SRS ports for each SRS resource, and F TDM It is a TDM factor equal to N.

3. The method as described in claim 2, wherein, When TDM is configured F TDM It equals 2, otherwise, F TDM It equals 1.

4. The method as described in any one of claims 2 and 3, wherein, Only the configuration yields the ratio. Integer and F TDM The combination, in which It equals M and is configured by Radio Resource Control (RRC).

5. The method of claim 4, wherein, The ratio is allowed only if the SRS resource is configured with one or more of repeat, frequency hopping, and RPFS. Greater than 1.

6. The method of claim 4, wherein, When the ratio If it is not an integer, then it is less than the stated ratio. The closest integer is the number of SRS symbols in each SRS port subset.

7. The method of claim 4, wherein, When the ratio When the number of symbols is not an integer, the number of symbols in each SRS port subset varies among the N SRS port subsets.

8. The method of claim 4, wherein, When the ratio When the numbers are not integers, the number of symbols and the number of SRS ports in each SRS port subset vary among the N port subsets.

9. The method according to any one of claims 4-8, wherein, When the ratio If the value is greater than 1 and repetition, frequency hopping, and RPFS are not configured, then in Each subset of SRS symbols is repeated within a subset of OFDM symbols. One SRS port.

10. The method of any one of claims 2-9, further comprising: Configure the WD (22) in multiple consecutive F TDM Transmitted in each set of symbols Duplicate SRS ports.

11. The method of any one of claims 2-10, further comprising configuring the WD (22) to detect the SRS port when both TDM and frequency hopping or both TDM and Partial Frequency Probing Based on Resource Block (RB) are configured.

12. The method according to any one of claims 2-11, wherein, Each SRS port subset occupies the same set of comb offsets and cyclic shift CS.

13. The method according to any one of claims 2-11, wherein, The comb offset for the antenna port is at least partially based on the ratio. .

14. The method according to any one of claims 2-13, wherein, The cyclic shift used for the antenna port is at least partially based on the ratio. .

15. The method according to any one of claims 2-14, wherein, When an 8-port SRS resource is configured with both TDM and cyclic shift frequency hopping, or both TDM and comb offset frequency hopping, then it is used for a quantity of The frequency hopping mode for each subset of the SRS ports is used for Same frequency hopping mode for port SRS resources.

16. A method in a wireless device WD (22) configured to communicate with a network node (16), the method comprising: Receive (S144) from the network node (16) cyclic mapping parameters for cyclically mapping the SRS ports of the sounding reference signal to SRS symbols, the cyclic mapping parameters including the number N of SRS port subsets and the number M of orthogonal frequency division multiplexing (OFDM) symbols to which the SRS port subsets are cyclically mapped; Circularly map a subset of N SRS ports (S146) to M OFDM symbols; and SRS transmission is performed according to the described cyclic mapping (S148).

17. The method of claim 16, wherein, The number of SRS ports in the N subsets is a ratio. The ratio represents the number of SRS ports per SRS symbol subset when Time Division Duplex (TDM) is configured, where This indicates the number of SRS ports for each SRS resource, and F TDM It is a TDM factor equal to N.

18. The method of claim 17, further comprising: In multiple consecutive F TDM Transmitted in each set of symbols Duplicate SRS ports.

19. The method of any one of claims 17 and 18, further comprising: When both TDM and frequency hopping or both TDM and Partial Frequency Probing Based on Resource Block (RB) are configured, probe the SRS ports in the subset of SRS ports.

20. The method of any one of claims 16-19, wherein, When both time division multiplexing and frequency hopping are configured, the same frequency counter is used to determine the frequency domain location for all SRS port subsets.

21. A network node (16) configured to communicate with a wireless device WD (22), said network node (16) being configured to: Configure the WD (22) with cyclic mapping parameters for cyclically mapping the SRS ports of the probe reference signal to SRS symbols, the cyclic mapping parameters including the number N of SRS port subsets and the number M of Orthogonal Frequency Division Multiplexing (OFDM) symbols to which the SRS port subsets are cyclically mapped; and Configure the WD (22) to perform SRS transmissions according to the cyclic mapping.

22. The network node (16) as described in claim 21, wherein, The number of SRS ports in the N subsets is a ratio. The ratio represents the number of SRS ports per SRS symbol subset when Time Division Duplex (TDM) is configured, where This indicates the number of SRS ports for each SRS resource, and F TDM It is a TDM factor equal to N.

23. The network node (16) as described in claim 22, wherein, When TDM is configured F TDM It equals 2, otherwise, F TDM It equals 1.

24. The network node (16) as claimed in any one of claims 22 and 23, wherein, Only the configuration yields the ratio. Integer and F TDM The combination, in which It equals M and is configured by Radio Resource Control (RRC).

25. The network node (16) as described in claim 24, wherein, The ratio is allowed only if the SRS resource is configured with one or more of repeat, frequency hopping, and RPFS. Greater than 1.

26. The network node (16) as described in claim 24, wherein, When the ratio If it is not an integer, then it is less than the stated ratio. The closest integer is the number of symbols in each SRS port subset.

27. The network node (16) as described in claim 24, wherein, When the ratio When the number of symbols is not an integer, the number of symbols in each SRS port subset varies among the N SRS port subsets.

28. The network node (16) as described in claim 24, wherein, When the ratio When the numbers are not integers, the number of symbols and the number of SRS ports in each SRS port subset vary among the N port subsets.

29. The network node (16) as described in any one of claims 24-27, wherein, When the ratio If the value is greater than 1 and repetition, frequency hopping, and RPFS are not configured, then in Each subset of SRS symbols is repeated within a subset of OFDM symbols. One SRS port.

30. The network node (16) as described in any one of claims 22-29, wherein, The network node (16) is configured to: configure the WD (22) in multiple consecutive... F TDM Transmitted in each set of symbols Duplicate SRS ports.

31. The network node (16) as described in any one of claims 22-30, wherein, The network node (16) is configured to: configure the WD (22) to detect the SRS port when both TDM and frequency hopping or TDM and partial frequency detection based on resource block RB are configured.

32. The network node (16) as described in any one of claims 22-31, wherein, Each SRS port subset occupies the same set of comb offsets and cyclic shift CS.

33. The network node (16) as described in any one of claims 22-32, wherein, The comb offset for the antenna port is at least partially based on the ratio. .

34. The network node (16) as described in any one of claims 22-33, wherein, The cyclic shift used for the antenna port is at least partially based on the ratio. .

35. The network node (16) as described in any one of claims 22-34, wherein, When an 8-port SRS resource is configured with both TDM and cyclic shift or both TDM and comb offset frequency hopping, the frequency hopping mode for each subset of P SRS ports is the same frequency hopping mode used for the P-port SRS resource.

36. A wireless device WD (22) configured to communicate with a network node (16), said WD (22) being configured to: The network node (16) receives cyclic mapping parameters for cyclically mapping the SRS ports of the sounding reference signal to SRS symbols, the cyclic mapping parameters including the number N of SRS port subsets and the number M of orthogonal frequency division multiplexing (OFDM) symbols to which the SRS port subsets are cyclically mapped; Cyclicly map a subset of N SRS ports to M OFDM symbols; as well as SRS transmissions are performed according to the described cyclic mapping.

37. The WD (22) as claimed in claim 36, wherein, The number of SRS ports in the subset of N subsets is based on a ratio. The ratio represents the number of SRS ports per SRS symbol subset when Time Division Duplex (TDM) is configured, where This indicates the number of SRS ports for each SRS resource, and F TDM It is a TDM factor equal to N.

38. The WD (22) as claimed in claim 37, wherein, The WD (22) is configured to: in multiple consecutive F TDM Transmitted in each set of symbols Duplicate SRS ports.

39. The WD (22) as claimed in any one of claims 37 and 38, wherein, The WD (22) is configured to detect SRS ports in a subset of SRS ports when both TDM and frequency hopping or both TDM and partial frequency detection based on resource block RB (RPFS) are configured.

40. The WD (22) as claimed in any one of claims 36-39, wherein, When both time division multiplexing and frequency hopping are configured, the same frequency counter is used to determine the frequency domain location for all SRS port subsets.

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