Base station, method thereof, and machine-readable storage medium

Abstract

A base station and a method thereof and a machine-readable storage medium are disclosed. The base station includes: one or more processors configured to: determine a first sounding reference signal (SRS) sequence and a second SRS sequence, process a first uplink (UL) transmission from a first UE incorporating the first SRS sequence on a first set of subcarrier frequencies, and process a second UL transmission from a second UE incorporating the second SRS sequence on a second set of subcarrier frequencies, wherein the second SRS sequence includes at least a first set of physical resource blocks (PRBs) overlapping with the first set of subcarrier frequencies and a second set of PRBs not overlapping with the first set of subcarrier frequencies; and an interface for sending the first transmission and the second transmission to a transmission circuit.

Description

[0001] Division Statement

[0002] This application is a divisional application of the Chinese invention patent application with the application date of June 12, 2018, the invention name of which is “Detection Reference Signal Sequence Design” and the application number is: 201880030567.X.

[0003] Priority claim

[0004] This application claims patent rights under 35 U.S.C. §119(e) to U.S. Provisional Patent Application Serial No. 62 / 518,488, filed on June 12, 2017, entitled “SOUNDING REFERENCE SIGNAL SEQUENCE DESIGN FOR NEW RADIO,” U.S. Provisional Patent Application Serial No. 62 / 544,628, filed on August 11, 2017, entitled “UPLINK REFERENCE SIGNAL SEQUENCE DESIGN FOR NEW RADIO SYSTEMS,” U.S. Provisional Patent Application Serial No. 62 / 567,179, filed on October 2, 2017, entitled “SOUNDING REFERENCE SIGNAL SOUNDING BANDWIDTH TABLE,” and U.S. Provisional Patent Application Serial No. 62 / 567,179, filed on October 2, 2017, entitled “SOUNDING REFERENCE SIGNAL SOUNDING BANDWIDTH TABLE,” and U.S. Provisional Patent Application Serial No. 62 / 567,179, filed on October 9, 2017, entitled “SOUNDING REFERENCE SIGNAL SOUNDING BANDWIDTH TABLE,” and U.S. Provisional Patent Application Serial No. 62 / 567,179, filed on October 2 ... No. 62 / 570,006, entitled “SOUNDING BAND WIDTH TABLE” and No. 62 / 588,078, filed on November 17, 2017, and entitled “SOUNDING REFERENCE SIGNAL (SRS) FREQUENCY AND GROUP HOPPING,” which applications are incorporated herein by reference in their entirety. Technical Field

[0005] The embodiments of the present application relate to the field of wireless communication technology, and in particular, to a base station and a method thereof, and a machine-readable storage medium. Background Art

[0006] A variety of wireless cellular communication systems have been implemented, including the 3rd Generation Partnership Project (3GPP), the Universal Mobile Telecommunications System (UMTS), the 3GPP Long Term Evolution (LTE) system, and the 3GPP LTE Advanced (LTE-A) system. Next-generation wireless cellular communication systems based on the LTE and LTE-A systems are being developed, such as the fifth generation (5G) wireless system / 5G mobile network system. The next generation wireless cellular communication system can provide support for higher bandwidth.

[0007] Meanwhile, various wireless cellular communication systems may employ a sounding reference signal (SRS), which may help establish uplink (UL) channel quality. Summary of the invention

[0008] Some embodiments of the present application provide a method, comprising: determining a first sounding reference signal (SRS) sequence and a second SRS sequence by a base station (BS) operable to communicate with a first user equipment (UE) and a second UE on a wireless network; processing a first uplink (UL) transmission from the first UE incorporating the first SRS sequence on a first group of subcarrier frequencies; and processing a second UL transmission from the second UE incorporating the second SRS sequence on a second group of subcarrier frequencies, wherein the second SRS sequence includes at least a first group of physical resource blocks (PRBs) overlapping with the first group of subcarrier frequencies and a second group of PRBs not overlapping with the first group of subcarrier frequencies.

[0009] Some embodiments of the present application provide a base station (BS) operable to communicate with a first user equipment (UE) and a second UE on a wireless network, comprising: one or more processors configured to determine a first sounding reference signal (SRS) sequence and a second SRS sequence; processing a first uplink (UL) transmission from the first UE incorporating the first SRS sequence on a first set of subcarrier frequencies; and processing a second UL transmission from the second UE incorporating the second SRS sequence on a second set of subcarrier frequencies, wherein the second SRS sequence includes at least a first set of physical resource blocks (PRBs) overlapping with the first set of subcarrier frequencies and a second set of PRBs not overlapping with the first set of subcarrier frequencies; and an interface for sending the first transmission and the second transmission to a transmission circuit.

[0010] Some embodiments of the present application provide a machine-readable storage medium having machine-executable instructions, which, when executed, enable one or more processors of a base station (BS) operable to communicate with a first user equipment (UE) and a second UE on a wireless network to perform the above-mentioned method in the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Embodiments of the present disclosure will be more fully understood from the detailed description given below and from the drawings of various embodiments of the present disclosure. However, although the drawings are intended to aid explanation and understanding, they are only an aid and should not be considered to limit the present disclosure to the specific embodiments depicted therein.

[0012] Figure 1 A scenario of sounding reference signal (SRS) overlap according to some embodiments of the present disclosure is shown.

[0013] Figure 2 A scenario of SRS overlap according to some embodiments of the present disclosure is shown.

[0014] Figure 3 A scenario of SRS overlap according to some embodiments of the present disclosure is shown.

[0015] Figure 4 An evolved Node B (eNB) and a user equipment (UE) according to some embodiments of the present disclosure are shown.

[0016] Figure 5 A hardware processing circuit of an eNB for flexible SRS sequence design according to some embodiments of the present disclosure is shown.

[0017] Figure 6 Hardware processing circuitry for a UE supporting a bandwidth part (BWP) according to some embodiments of the present disclosure is shown.

[0018] Figure 7 A method of an eNB for flexible SRS sequence design according to some embodiments of the present disclosure is shown.

[0019] Figure 8 A method for a UE supporting BWP according to some embodiments of the present disclosure is shown.

[0020] Fig. 9 Example components of an apparatus according to some embodiments of the present disclosure are shown.

[0021] Fig.10 An example interface of a baseband circuit according to some embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0022] Various wireless cellular communication systems have been implemented or are being proposed, including the Third Generation Partnership Project (3GPP), the Universal Mobile Telecommunications System (UMTS), the 3GPP Long Term Evolution (LTE) system, the 3GPP LTE Advanced (LTE-A) system, and the Fifth Generation (5G) wireless system / 5G mobile network system / 5G New Radio (NR) system.

[0023] With respect to various embodiments, the NR system may use Zadoff Chu (ZC) sequences for NR SRS sequence design (which may facilitate support for LTE SRS sequences that are a subset or special case of NR SRS sequences). Although ZC may have various properties that may be desirable for designing reference signals such as sounding reference signals (SRS), there may be various issues and design details that arise in the NR setting compared to the legacy LTE setting. For example, the sounding BW used in NR may be significantly larger than the sounding BW used for legacy LTE. As another example, in NR, it may be desirable to increase SRS capacity by taking into account the scheduling of multiple UEs within a cell or associated with transmission / reception points (TRPs) that have partial or full overlap of sounding bandwidths (BWs) at the same comb offset.

[0024] Disclosed herein are various design details of an SRS sequence design for NR based on a ZC sequence. In various embodiments, multiple UE-specific SRS configurations may be employed to facilitate flexible SRS design that supports SRS sequences generated using a concatenation of one or more ZC sequences in addition to supporting designs based on pure ZC sequences.

[0025] Also disclosed herein are designs for NR SRS sequences such that they can be compatible with LTE SRS designs and that SRS capacity can be increased simultaneously by taking into account scheduling of multiple UEs within a cell or associated with TRPs having partial or full overlap of sounding BWs at substantially the same comb offset. In various embodiments, an SRS sequence constructed by concatenation of one or more block ZC sequences or by truncated portions of one or more long ZC mother sequences can be designed for a specific TRP and can be time division multiplexing (TDM) or frequency division multiplexing (FDM) with a conventional LTE like SRS design (e.g., via a comb structure with a partial band structure).

[0026] Regarding various embodiments, NR SRS may allow for a sounding bandwidth of up to 272 PRBs, where the sounding bandwidth may be a multiple of 4 PRBs and may support a minimum of 4 PRBs. In addition, NR may support UE-specific configured bandwidths based on a tree-like SRS bandwidth group (similar to legacy LTE). However, compared to legacy LTE SRS, the NR SRS design may accommodate bandwidth operation of more than 96 PRBs and may also support bandwidth parts (BWPs), which may further complicate the design of SRS sounding BW tables supported for NR.

[0027] In NR, the uplink (UL) system BW can be up to 275 PRBs. In addition, in NR, for wideband operation, various embodiments can support BWP. The BWP can be UE-specific and can be equal to or less than the maximum bandwidth capability supported by the UE. In addition, the UE can be configured with multiple BWPs and can support switching between BWPs based on downlink control information (DCI).

[0028] Disclosed herein are various designs to accommodate the various challenges mentioned herein and the details of the SRS sounding bandwidths for the supported groups. Various embodiments may be designed for the SRS bandwidths for the groups supported by NR: Some embodiments may involve limiting the overlap of BWPs for different UEs configured on the same SRS resources to full overlap or no overlap. Some embodiments may involve allowing multiple SRS configurations for each UE for each configured BWP. Some embodiments may involve SRS sounding BW designs for the groups supported by LTE for up to 96 PRBs and extending beyond 96 PRBs and up to 272 PRBs.

[0029] Regarding various embodiments, NR SRS may support periodic, aperiodic, and / or semi-persistent NR-SRS transmissions. The SRS resources of X ports may span N adjacent OFDM symbols in the same slot, where N=1, 2, or 4, and where all X ports are mapped to each symbol of the resource. In addition, NR may support multiple C SRS Value and the 4 Bs SRS In addition, NR may also support configurable frequency hopping (e.g., intra-slot and / or inter-slot) within a BWP (or part-band) for a UE. The hopping pattern may be configured in a manner that is consistent with the C SRS , B SRS and b HOP All of these can be UE-specific (e.g., configured specifically by the UE) within a defined tree structure. In addition, the NR system can also support group and sequence hopping (as in traditional LTE).

[0030] Disclosed herein are further design details for supporting frequency and group hopping (and / or sequences within group hopping) of SRS transmission for NR MIMO (multiple-input multiple-output).

[0031] Some embodiments may involve frequency hopping types within a time slot, frequency hopping types between time slots, and / or a combination of both types of frequency hopping. Various embodiments may support frequency hopping for various types of SRS transmissions (e.g., aperiodic SRS, periodic SRS, and / or semi-permanent SRS). Various embodiments may reuse a frequency hopping formula modified to cumulatively count the number of symbols available for SRS transmission over multiple time slots (each time slot comprising one or more symbols).

[0032] Some embodiments may involve group hopping.Some embodiments may include random selection of a sequence index v within a transient group based on the same random number being used to select a group ID during hopping.

[0033] In the following description, many details are discussed to provide a more comprehensive explanation of the embodiments of the present disclosure. However, it will be apparent to those skilled in the art that the embodiments of the present disclosure can be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form rather than in detail in order to avoid obscuring the embodiments of the present disclosure.

[0034] It should be noted that in the corresponding figures of the embodiments, the signals are represented by lines. Some lines may be thicker to indicate a greater number of constituent signal paths and / or have arrows at one or more ends to indicate the direction of information flow. Such indications are not intended to be restrictive. Rather, these lines are used in conjunction with one or more exemplary embodiments to facilitate easier understanding of circuits or logic units. As indicated by design needs or preferences, any represented signal may actually include one or more signals that may travel in either direction and may be implemented with any suitable type of signal scheme.

[0035] Throughout the specification and in the claims, the term "connected" refers to a direct electrical, mechanical or magnetic connection between connected objects without any intermediate devices. The term "coupled" refers to a direct electrical, mechanical or magnetic connection between connected objects or an indirect connection through one or more passive or active intermediate devices. The term "circuit" or "module" may refer to one or more passive and / or active components that are arranged to cooperate with each other to provide a desired function. The term "signal" may refer to at least one current signal, voltage signal, magnetic signal or data / clock signal. The meaning of "a", "an" and "the" includes plural references. The meaning of "in", "in" includes "in", "on", and "on".

[0036] The terms "substantially," "close," "approximately," "near," and "about" generally refer to within + / - 10% of a target value. Unless otherwise specified, the use of ordinal adjectives "first," "second," and "third," etc., describing common objects merely indicates different instances of similar objects and is not intended to imply that the objects so described must be in a given order, whether temporally, spatially, in rank, or in any other manner.

[0037] It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in other orientations than those illustrated or described herein.

[0038] The terms "left", "right", "front", "back", "top", "bottom", "above", "below" and the like in the present specification and claims, if any, are used for descriptive purposes and are not necessarily intended to describe permanent relative positions.

[0039] For the purpose of the embodiments, the transistors in various circuits, modules and logic blocks are tunnel FETs (TFETs). Some transistors of various embodiments may include metal oxide semiconductor (MOS) transistors, which include drain, source, gate and body terminals. The transistors may also include tri-gate and FinFET transistors, cylindrical full-gate transistors, square wire or rectangular ribbon transistors or other devices that implement transistor functions, such as carbon nanotubes or spintronic devices. The symmetrical source and drain of MOSFET are the same terminals and can be used interchangeably here. On the other hand, TFET devices have asymmetric source and drain terminals. It will be appreciated by those skilled in the art that other transistors, such as bipolar junction transistors-BJTPNP / NPN, BiCMOS, CMOS, etc., may be used for some transistors without departing from the scope of the present disclosure.

[0040] For purposes of this disclosure, the phrases "A and / or B" and "A or B" mean (A), (B), or (A and B). For purposes of this disclosure, the phrases "A, B, and / or C" mean (A), (B), (C), (A and B), (A and C), (B and C), or (A, B, and C).

[0041] Additionally, the various elements of the combinatorial and sequential logic discussed in this disclosure may relate to physical structures (such as AND gates, OR gates, or XOR gates), or to a comprehensive or otherwise optimized collection of devices of such logic structures that implement Boolean equivalents of the logic discussed.

[0042] In addition, for the purposes of this disclosure, the term "eNB" may refer to an evolved Node B (eNB) with traditional LTE capabilities, a next-generation or 5G-capable eNB, an eNB with centimeter wave (cmWave) capabilities or a cmWave small cell, an eNB with millimeter wave (mmWave) capabilities or an mmWave small cell, an access point (AP), and / or another base station for a wireless communication system. The term "gNB" may refer to an eNB with 5G capabilities or an eNB with NR capabilities. For the purposes of this disclosure, the term "UE" may refer to a user equipment (UE) with traditional LTE capabilities, a UE with mmWave capabilities, a UE with cmWave capabilities, a station (STA), and / or another mobile device for a wireless communication system. The term "UE" may also refer to a next-generation or 5G-capable UE.

[0043] Various embodiments of the eNB and / or UE discussed below may process one or more transmissions of various types. Some processing of a transmission may include demodulating, decoding, detecting, parsing, and / or otherwise processing a received transmission. In some embodiments, the eNB or UE processing the transmission may determine or identify the type of transmission and / or the conditions associated with the transmission. For some embodiments, the eNB or UE processing the transmission may act according to the type of the transmission and / or may act conditionally based on the type of the transmission. The eNB or UE processing the transmission may also identify one or more values ​​or fields of data carried by the transmission. Processing a transmission may include moving the transmission through one or more layers of a protocol stack (which may be implemented in, for example, hardware and / or software configured elements) such as by moving a transmission that has been received by the eNB or UE through one or more layers of the protocol stack.

[0044] Various embodiments of the eNB and / or UE discussed below may also generate one or more transmissions of various types. Some generation of transmissions may include modulating, encoding, formatting, assembling and / or otherwise processing the transmission to be transmitted. In some embodiments, the eNB or UE generating the transmission may establish the type of the transmission and / or the conditions associated with the transmission. For some embodiments, the eNB or UE generating the transmission may act according to the type of the transmission and / or may act conditionally based on the type of the transmission. The eNB or UE generating the transmission may also determine one or more values ​​or fields of the data carried by the transmission. Generating a transmission may include moving the transmission through one or more layers of a protocol stack to be sent by the eNB or UE, moving the transmission through one or more layers of a protocol stack (this may be implemented in, for example, elements configured in hardware and / or software).

[0045] In various embodiments, resources may span various resource blocks (RBs), physical resource blocks (PRBs), and / or time periods (e.g., frames, subframes, and / or time slots) of a wireless communication system. In some contexts, the allocated resources (e.g., channels, orthogonal frequency division multiplexing (OFDM) symbols, subcarrier frequencies, resource elements (REs), and / or portions thereof) may be formatted for transmission (and prior to transmission) on a wireless communication link. In other contexts, the allocated resources (e.g., channels, OFDM symbols, subcarrier frequencies, REs, and / or portions thereof) may be detected from reception (and after reception) on a wireless communication link.

[0046] With respect to various embodiments, the SRS may be a reference signal transmitted by the UE in the UL direction that may be used by the gNB to estimate the UL channel quality for UL frequency selective scheduling. The SRS may also be used for other purposes, such as to obtain downlink channel state information (CSI) in the case of a time division duplex (TDD) system with reciprocity or for UL timing estimation as part of a timing alignment procedure.

[0047] The SRSs of different UEs transmitted in the same symbol may be configured to occupy different bandwidths with potential overlap while maintaining zero to low interference between the transmissions, which may advantageously support frequency selective scheduling. Thus, in various embodiments, the SRS sequence design may take into account multiple users to transmit SRSs with full overlap and / or partial overlap of SRS time-frequency resources. Furthermore, in various embodiments,

[0048] The NR SRS sequence may be based on one or more ZC sequences and / or may support the use of LTE SRS sequences as a subset or special case of the NR SRS design. In addition, if scheduled or deemed useful, the NR SRS design may allow for multiple users to transmit SRS with full and / or partial overlap of SRS time-frequency resources.

[0049] In conventional LTE, users with fully overlapping SRS time-frequency resources can use different cyclic time shifts of the same reference signal (RS) sequence to maintain orthogonal separation of SRS transmissions. Although this works well in the scenario of fully overlapping allocations, it does not work well for users with partially overlapping SRS resources.

[0050] Figure 1Scenarios of SRS overlap according to some embodiments of the present disclosure are shown. Scenario 100 provides an example of overlap where two UEs (e.g., UE-1 and UE-3) have the same sounding bandwidth and comb offset and use the same basic ZC sequence with different cyclic time shifts, and therefore have zero cross-correlation between SRS transmissions from these users. Similarly, two other UEs (e.g., UE-2 and UE-4) also have the same sounding bandwidth and comb offset and use the same basic ZC sequence with different cyclic time shifts, and therefore have zero cross-correlation between SRS transmissions from these users.

[0051] In contrast, Figure 2 Scenarios of SRS overlap according to some embodiments of the present disclosure are shown. Scenario 200 provides an example where two overlapping UEs (e.g., UE-1 and UE-3) use ZC sequences with different roots and thus cause significant interference or high cross-correlation values ​​between the SRS transmissions of UE-1 and UE-3. Although having multiple interleaved single-carrier frequency division multiple access (IFDMA) combs can provide some flexibility in sounding bandwidth allocation, it can still be restrictive, such as in NR designs where the system bandwidth BW can be much larger than traditional LTE.

[0052] In addition, when the sequence length is large, the BW in NR may be higher and the ZC phase value may encounter stability issues. This in turn may not be conducive to designing SRS for larger detection bandwidth BW using pure ZC sequence.

[0053] Various embodiments may incorporate multiple ways to design SRS sequences to account for partially overlapping sounding BW allocations.

[0054] One possible solution to various problems associated with supporting larger sounding BW and supporting orthogonal SRS transmission with partially overlapping SRS resource allocations can be established: the base sequence to be used by multiple users in overlapping time-frequency SRS resources is the same. Different cyclic time shifts of the common base sequence can then be used to advantageously achieve piecewise orthogonality.

[0055] For example, Figure 3 A scenario of SRS overlap according to some embodiments of the present disclosure is shown. Scenario 300 provides an example of two users (e.g., UE-1 and UE-3) that may have unequal and overlapping SRS resources. UE-3 may use a block concatenated sequence so that in the overlapping region (shown with the same cross-hatching), the sequences used by UE-1 and UE-3 may be the same until cyclically time-shifted.

[0056] Regarding various embodiments, in LTE, the eNB may configure the UE with a UE-specific SRS configuration, which may provide the UE with various details regarding SRS transmission, such as time domain resources (e.g., subframes), frequency domain resources, transmission comb indice, cyclic shift, sounding BW, etc. These and the cell-specific configuration details may enable the UE to generate an SRS sequence in LTE.

[0057] NR may use the legacy LTE framework to generate an SRS sequence consisting of a concatenation of one or more ZC sequences. In various embodiments, NR may configure a UE with multiple SRS configurations, which may be activated (e.g., triggered) for transmission in the same UL symbol. The gNB may control details such as the number of blocks to concatenate, the frequency domain locations of the blocks (e.g., contiguous or non-contiguous), the BW of the various blocks, the roots of the ZC to be used in different blocks (e.g., the same root or different roots), the cyclic shifts to be used in the various blocks, etc.

[0058] Block concatenation of ZC sequences can impact the peak-to-average power ratio (PAPR), which careful design can advantageously help mitigate. The gNB may decide the allocation of concatenation (if any) based on the corresponding use case and may achieve the desired PAPR on the UL transmission for each UE.

[0059] With respect to various embodiments, a block concatenation sequence may be constructed by concatenation of two blocks with a relative phase rotation (or time domain cyclic shift) between the concatenated blocks, wherein the phase rotation is selected so as to minimize the PAPR or CM of the resulting SRS sequence. In some embodiments, the number of blocks to be concatenated may be configurable and / or signaled to various users (e.g., UEs). These designs may be compatible with conventional LTE SRS designs in the sense that various LTE SRS sequences (e.g., SRS based on pure ZC sequences) may be used as part of the NR SRS sequence. In addition, only those users (e.g., UEs) that are scheduled for transmission based on concatenated sequences may be signaled in this manner, and the design may be transparent to UEs that are scheduled for transmission without concatenation or one block ZC sequence. Such a design may also advantageously be compatible with coexistence of LTE-NR neighboring cells. .

[0060] In some embodiments, the NR SRS sequence may include two types of sequences. The first type of sequence may be based on a ZC sequence (similar to a conventional LTE sequence), where different root sequences may be used to construct a detection sequence for different detection bandwidth lengths. For the second type of sequence, one or more mother ZC sequences may be constructed for each TRP (and / or cell and / or gNB), and may typically have a large length (e.g., long enough to cover the system bandwidth).

[0061] One or more users may then be configured to use sequences from one category or the other. The configuration may be static, semi-static and / or dynamic. The different categories of sequences may be separated in resources in the time domain (e.g., different transmission opportunities) or in resources in the frequency domain (e.g., different partial bands or comb offsets). When using sequences from the category of long truncated ZC sequences, various users may use truncated portions of the sequence corresponding to the allocated sounding BW. It should be noted that the second category of sequences may be resource specific (e.g., may be a function of the sounding position or PRB index, not just the sounding BW length).

[0062] Thus, various embodiments may relate to a method of supporting transmission and measurement of SRS signals at the UE and the gNB, wherein the method may include: configuring the UE; preparing the SRS; transmitting the SRS from the UE; receiving the SRS at the gNB; and appropriately processing the SRS at the gNB.

[0063] In some embodiments, the SRS sequence may be designed based on a ZC sequence. For some embodiments, the SRS sequence may include a concatenation of one or more blocks of a ZC sequence. In some embodiments, a UE may be configured with multiple UE-specific SRS configurations. For some embodiments, multiple UE-specific SRS configurations may be activated or triggered for SRS transmission in the same UL symbol.

[0064] In some embodiments, different UE-specific SRS configurations activated for SRS transmission may be scheduled simultaneously on adjacent frequency domain resources. For some embodiments, different UE-specific SRS configurations activated for SRS transmission may be configured simultaneously on non-adjacent frequency domain resources. In some embodiments, different UE-specific SRS configurations activated for SRS transmission may be configured to have equal detection bandwidths at the same time. For some embodiments, different UE-specific SRS configurations activated for SRS transmission may be configured to have unequal detection bandwidths at the same time. In some embodiments, different UE-specific SRS configurations activated for SRS transmission may be configured to have the same ZC sequence root at the same time. For some embodiments, different UE-specific SRS configurations activated for SRS transmission may be configured to have different ZC sequence roots at the same time. In some embodiments, different UE-specific SRS configurations activated for SRS transmission may be configured to have certain specific relationships between the cyclic shifts at the same time, which may advantageously facilitate the achievement of certain PAPR or cubic metric (CM) targets for SRS transmission.

[0065] In some embodiments, different blocks may use ZC sequences of different roots. For some embodiments, different blocks may use block-relative phase rotation, which may advantageously reduce the PAPR or CM of the effective sequence. In some embodiments, the system may be deployed to coexist with LTE cells. For some embodiments, both users allocated with sequence-based cascade generation and users without cascades may be multiplexed on the same time-frequency resources. In some embodiments, frequency hopping and sequence hopping may be supported. For some embodiments, the SRS sequence may include a cascade of one or more blocks of ZC sequences. In some embodiments, one or more long mother ZC sequences may be designed for each TRP (and / or gNB and / or cell).

[0066] For some embodiments, the system may be deployed to coexist with LTE cells. In some embodiments, users allocated with cascaded sequence generation and users without cascaded sequence generation may be multiplexed in a TDM manner or in an FDM manner. For some embodiments, frequency hopping and / or sequence hopping may be supported.

[0067] With respect to various embodiments, the SRS may be transmitted by the UE in the UL direction and may be used by the gNB to estimate the UL channel quality for UL frequency selective scheduling. It may also be used for other purposes, such as for obtaining downlink (DL) CSI in the case of a TDD system with reciprocity, or for obtaining UL timing estimates as part of a timing alignment procedure.

[0068] In conventional LTE, the SRS sounding bandwidth may be determined by a cell-specific parameter (e.g., C SRS) and UE-specific parameters (B SRS ) is specified. For different UL system bandwidths, the SRS BW supported by conventional LTE may be different. For example, Table 1 below provides UL system bandwidths between 6 PRBs and 40 PRBs. It should be noted that each row of Table 1 (indicated by C SRS Select) has a tree-like nested structure of frequency hopping that facilitates narrowband SRS detection.

[0069] Table 1: Table for UL system bandwidth between 6 PRBs and 40 PRBs

[0070]

[0071] NR can support UE-specific configured bandwidth based on tree-like SRS bandwidth groups (which can be similar to traditional LTE). However, there can be various differences in NR SRS design compared to traditional LTE SRS.

[0072] For example, in NR, the UL system BW can be up to 275 PRBs. Therefore, the NR design can be pre-configured to include a new option group for SRS sounding for larger BW. In addition, in NR, for wideband operation, the system can support BWP. BWP can be UE-specific and can be equal to or less than the maximum bandwidth capability supported by the UE.

[0073] In addition, the NR SRS design can support probing of substantially all UL PRBs in a BWP. In addition, the UE can be configured with multiple BWPs with DCI-based switching between BWPs. This can complicate the design of a nested tree structure (similar to legacy LTE) for supported SRS BWs.

[0074] C SRS and B SRS It can be UE-specific. It should be noted that the nested tree structure can be the relationship between the SRS detection allocations of different UEs in the cell. For NR, due to the configuration parameter C SRS and B SRS The nested tree structure may be UE-specific and may not be guaranteed solely by the table of supported SRS sounding BWs, but may be enforced at least in part using restrictions or rules implemented by the network and / or gNB. For example, in Table 1, the gNB may not configure C with values ​​equal to 6 and 7 in a cell. SRS Two UEs (e.g., UE-1 and UE-2) are configured to respectively set B SRS Equals 1 and 1.

[0075] In various embodiments, the NR gNB and / or network implementation may be arranged to enforce a nested tree structure among the SRS sounding allocations for various configured UEs within a cell.

[0076] Another aspect of BWP that can complicate NR SRS design is the overlap of BWP among different UEs. Without specifying further restrictions, the BWP of two different UEs within a cell may overlap by any amount. Therefore, if UEs with partially overlapping BWs detect on the overlapping BWs at the same time and / or with the same comb offset, considerable interference may result. Therefore, in some embodiments, the BWPs of different UEs within a cell may be configured in the same detection resources to not overlap or to completely overlap (e.g., a larger BWP contains a smaller BWP). In addition, in some embodiments, the activated BWP of the UE may be switched using DCI signaling. The UE may be arranged to be configured with one or more SRS resource configurations for each configured BWP.

[0077] In various embodiments, the set of SRS BWs for wideband NR operation may be extended as shown in Table 2 below.

[0078] Table 2: Table for UL system bandwidth between 120 PRBs and 272 PRBs

[0079]

[0080]

[0081] In various embodiments, the set of SRS BWs for wideband NR operation may be extended as shown in Table 3 below.

[0082] Table 3: Table for UL system bandwidth between 120 PRBs and 272 PRBs

[0083]

[0084] In NR, unlike legacy LTE where the rows of the table may be cell-specific and the columns may be UE-specific, in Tables 2 and 3, the rows and columns may be UE-specific (e.g., may be specifically configured by the UE). Thus, the values ​​in Table 3 (for example) may allow the UE to advantageously use the minimum narrowband sounding instance to sound for the maximum BW in one or more rows. In addition, the NR system may support narrowband sounding values ​​that are supported in the legacy LTE SRS table or are multiples of the legacy LTE SRS table values, which may advantageously facilitate backward compatibility with legacy LTE systems and / or devices.

[0085] Thus, various embodiments may be directed to methods of channel measurement and CSI calculation at a gNB. The method may include configuration of SRS resources for a UE. The method may also include transmission of the UL reference signal channel (e.g., SRS) from the UE, reception at the gNB, and CSI estimation.

[0086] In some embodiments, the UE may be configured to operate on a specific bandwidth range BWP. For some embodiments, the UE may be configured with one or more BWPs, one of which may be activated at a time. In some embodiments, DCI signaling may be used to switch the active BWP. For some embodiments, for each configured BWP for the UE, the UE may be configured with one or more SRS resources.

[0087] In some embodiments, one or more UEs configured on the same SRS resources may have no overlap in activated BWPs, or may have complete overlap (such as when a larger BWP contains a smaller BWP or BWPs of equal size). For some embodiments, the gNB may use the values ​​specified in Table 2 and / or Table 3 as the supported bandwidth for sounding SRS in NR for one or more groups. In some embodiments, the scheduler at the gNB may assign consistent values ​​to different UEs within its cell so that the relationship between the SRS BWs assigned to different UEs forms a nested tree structure. For some embodiments, the supported sounding BWs may be integer multiples of the values ​​supported in the legacy LTE SRS sounding table.

[0088] Regarding various embodiments, the sounding reference signal sequence is Can be obtained from Start by mapping the resource elements (k, l) on antenna port p in sequence:

[0089]

[0090] Where N ap The number of antenna ports that can be used for sounding reference signal transmission.

[0091] quantity may be the frequency domain starting position of the sounding reference signal, and for b=B SRS , the length of the sounding reference signal sequence Can be limited to

[0092]

[0093] Where m SRS，b It may be the number of PRBs from the SRS BW table selected based on one or more UE-specific configuration parameters.

[0094] Frequency domain start position It can be defined by:

[0095]

[0096] in It can be a frequency offset to center the SRS transmission around the desired frequency band (e.g., around the center of the UL system BW). The frequency hopping of the sounding reference signal can be determined by the parameter b hop ∈{0, 1, 2, 3} configuration, which can be provided by higher layer parameters (such as srs-HoppingBandwidth).

[0097] If the frequency hopping of the sounding reference signal is not enabled (i.e., b hop ≥B SRS ), frequency position index n b may remain constant (unless reconfigured) and may be defined by:

[0098]

[0099] The parameter n RRC It may be given by higher layer parameters (ie freqDomainPosition for periodic transmission and / or one or more configured freqDomainPosition-ap for aperiodic transmission).

[0100] If the frequency hopping of the sounding reference signal is enabled (i.e., b hop <B SRS ), the frequency position index n b It can be defined by:

[0101]

[0102] Where N b It is given by the table in [7].

[0103]

[0104] Where N b value And n SRS The total number of UE-specific SRS transmissions may be counted.

[0105] There are various options for counting n SRS According to the first option, n SRS It can be the number of SRS transmission time slots dedicated to the UE. This can result in frequency hopping between SRS time slots. According to the second option, n SRSIt can be the number of UE-specific SRS transmission symbols in a time slot. This can result in frequency hopping of the SRS in a time slot. According to the third option, n SRS It may be the number of UE-specific SRS transmission symbols accumulated across multiple slots. This may result in frequency hopping across intra-slot transmission opportunities and inter-slot transmission opportunities.

[0106] Other values ​​in the above formula may be determined based on the SRS subframe configuration table. In various embodiments, NR may support frequency hopping only within a slot for aperiodic SRS. For various embodiments, NR may support all three options above for frequency hopping replacement for periodic SRS and semi-persistent SRS.

[0107] Regarding group and sequence hopping, in time slot n, according to the following s The number of sequence groups u in the sequence can be determined by the group hopping pattern f gh (n s ) and the sequence shift pattern f ss :

[0108] u=(f gh (n s )+f ss )mod 30

[0109] The set of hopping patterns f for SRS gh (n s ) can be given by:

[0110]

[0111] The pseudo-random sequence c(i) may be generated based on a Gold code initialized with a seed value that depends on the SRS identifier (ID).

[0112] When group hopping is enabled in legacy LTE, the sequence ID within the group may be fixed to v = 0. In some embodiments, for NR, the sequence ID v = 0 or 1 may be changed as follows:

[0113]

[0114] Therefore, in various embodiments, sequence hopping may be enabled along with group hopping for more randomization and interference management.

[0115] Various embodiments may accordingly relate to a method of channel measurement and CSI calculation at the gNB, which may include configuration of the SRS resources for UE transmission of the UL reference signal channel (e.g., SRS) from the UE and reception and CSI estimation at the gNB.

[0116] In some embodiments, the UE may be configured with no resources or one or more aperiodic, periodic and / or semi-permanent SRS resources. For some embodiments, each SRS resource may include 1, 2, or 4 symbols per time slot. In some embodiments, intra-time slot frequency hopping of SRS, inter-time slot frequency hopping of SRS, or a combination of both may be supported.

[0117] For some embodiments, only frequency hopping within a time slot may be supported for non-periodic SRS resources. In some embodiments, the frequency hopping formula may be as discussed herein. For some embodiments, the number of SRS transmissions may be counted for one time slot, one count per time slot, or cumulatively across multiple time slots.

[0118] In some embodiments, group hopping for SRS transmission may be supported. For some embodiments, in addition to group hopping, sequence hopping may also be enabled simultaneously. In some embodiments, the random number for sequence hopping along with group hopping may be given as discussed herein.

[0119] Figure 4 An eNB and a UE according to some embodiments of the present disclosure are shown. Figure 4 A block diagram includes an eNB 410 and a UE 430 operable to coexist with each other and other elements of an LTE network. A high level simplified architecture of the eNB 410 and the UE 430 is depicted so as not to obscure the embodiments. It should be noted that in some embodiments, the eNB 410 may be a fixed, non-mobile device.

[0120] The eNB 410 is coupled to one or more antennas 405, and the UE 430 is similarly coupled to one or more antennas 425. However, in some embodiments, the eNB 410 may incorporate or include antennas 405, and the UE 430 may incorporate or include antennas 425 in various embodiments.

[0121] In some embodiments, antenna 405 and / or antenna 425 may include one or more directional antennas or omnidirectional antennas, including monopole antennas, dipole antennas, loop antennas, patch antennas, microstrip antennas, coplanar wave antennas, or other types of antennas suitable for transmission of RF signals. In some MIMO (multiple input and multiple output) embodiments, antennas 405 are separated to take advantage of spatial diversity.

[0122] The eNB 410 and the UE 430 are operable to communicate with each other over a network, such as a wireless network. The eNB 410 and the UE 430 can communicate with each other over a wireless communication channel 450 having a downlink path from the eNB 410 to the UE 430 and an uplink path from the UE 430 to the eNB 410.

[0123] like Figure 4 As shown in FIG. 4 , in some embodiments, eNB 410 may include physical layer circuitry 412, MAC (media access control) circuitry 414, processor 416, memory 418, and hardware processing circuitry 420. Those skilled in the art will appreciate that other components not shown may be used in addition to the components shown to form a complete eNB.

[0124] In some embodiments, the physical layer circuit 412 includes a transceiver 413 for providing signals to and from the UE 430. The transceiver 413 provides signals to and from the UE or other devices using one or more antennas 405. In some embodiments, the MAC circuit 414 controls access to the wireless medium. The memory 418 may be or may include a storage medium such as a magnetic storage medium (e.g., a tape or disk), an optical storage medium (e.g., an optical disk), an electronic storage medium (e.g., a traditional hard drive, a solid-state disk drive, or a flash-based storage medium), or any tangible storage medium or non-transitory storage medium. The hardware processing circuit 420 may include logic devices or circuits to perform various operations. In some embodiments, the processor 416 and the memory 418 are arranged to perform the operations of the hardware processing circuit 420, such as the operations described herein with reference to the logic devices and circuits of the eNB 410 and / or the hardware processing circuit 420.

[0125] Thus, in some embodiments, the eNB 410 may be a device that includes an application processor, a memory, one or more antenna ports, and an interface for operating the application processor to communicate with another device.

[0126] Also like Figure 4 As shown in FIG. 4 , in some embodiments, UE 430 may include physical layer circuitry 432, MAC circuitry 434, processor 436, memory 438, hardware processor circuitry 440, wireless interface 442, and display 444. Those skilled in the art will appreciate that other components not shown may be used in addition to the components shown to form a complete UE.

[0127] In some embodiments, the physical layer circuit 432 includes a transceiver 433 for providing signals to and from the eNB 410 (and other eNBs). The transceiver 433 provides signals to and from the eNB or other devices using one or more antennas 425. In some embodiments, the MAC circuit 434 controls access to the wireless medium. The memory 438 may be or may include a storage medium such as a magnetic storage medium (e.g., a tape or disk), an optical storage medium (e.g., an optical disk), an electronic storage medium (e.g., a traditional hard drive, a solid-state disk drive, or a flash-based storage medium), or any tangible storage medium or non-transitory storage medium. The wireless interface 442 may be arranged to allow the processor to communicate with another device. The display 444 may provide a visual and / or tactile display for a user to interact with the UE 430, such as a touch screen display. The hardware processing circuit 440 may include a logic device or circuit to perform various operations. In some embodiments, the processor 436 and the memory 438 may be arranged to perform the operations of the hardware processing circuitry 440 , as described herein with reference to logic devices and circuits within the UE 430 and / or the operations of the hardware processing circuitry 440 .

[0128] Thus, in some embodiments, UE 430 may be a device that includes an application processor, memory, one or more antennas, a wireless interface to allow the application processor to communicate with another device, and a touch screen display.

[0129] Figure 4 Elements of and elements of other figures having the same name or reference number may operate or function in the manner described herein with respect to any such figures (although the operation and functionality of such elements are not limited to such description). For example, Figures 5 and 6 and Figures 9 and 10 Also shown are embodiments of an eNB, a hardware processing circuit of an eNB, a UE and / or a hardware processing circuit of a UE, and with respect to Figure 4 and Figures 5 and 6 and Figures 9 and 10 The described embodiments may operate or function in the manner described herein with respect to any of the figures in the accompanying drawings.

[0130] In addition, although the eNB 410 and the UE 430 are each described as having several separate functional elements, one or more of the functional elements may be combined and may be implemented by a combination of software-configured elements and / or hardware elements. In some embodiments of the present disclosure, the functional elements may refer to one or more processes operating on one or more processing elements. Examples of software and / or hardware-configured elements include digital signal processors (DSPs), one or more microprocessors, DSPs, field programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), radio frequency integrated circuits (RFICs), etc.

[0131] Figure 5 The hardware processing circuit of an eNB for flexible SRS sequence design according to some embodiments of the present disclosure is shown. Figure 4 , the eNB may include various hardware processing circuits discussed in this article (such as Figure 5 Hardware processing circuitry 5), which in turn may include logic devices and / or circuits operable to perform various operations. Figure 4 In the present invention, the eNB 410 (or various elements or components therein, such as the hardware processing circuit 420 or a combination of elements or components therein) may include a part or all of these hardware processing circuits.

[0132] In some embodiments, one or more devices or circuits within these hardware processing circuits may be implemented by a combination of software-configured elements and / or other hardware elements. For example, processor 416 (and / or one or more other processors that eNB 410 may include), memory 418, and / or other elements or components of eNB 410 (which may include hardware processing circuit 420) may be arranged to perform operations of these hardware processing circuits, such as the operations described herein with reference to the devices and circuits within these hardware processing circuits. In some embodiments, processor 416 (and / or one or more other processors that eNB 410 may include) may be a baseband processor.

[0133] Return to Figure 5 , a device of an eNB 410 (or another eNB or base station) that may be operable to communicate with one or more UEs on a wireless network may include hardware processing circuitry 500. In some embodiments, the hardware processing circuitry 500 may include one or more antenna ports 505 that are operable to provide various transmissions on a wireless communication channel, such as the wireless communication channel 450. The antenna port 505 may be coupled to one or more antennas 507 (which may be antennas 405).

[0134] In some embodiments, hardware processing circuit 500 may be incorporated into antenna 507 , while in other embodiments, hardware processing circuit 500 may be coupled only to antenna 507 .

[0135] Antenna port 505 and antenna 507 may be operable to provide signals from the eNB to a wireless communication channel and / or a UE, and may be operable to provide signals from a UE and / or a wireless communication channel to the eNB. For example, antenna port 505 and antenna 507 may be operable to provide transmissions from eNB 410 to wireless communication channel 450 (and from there to UE 430 or from there to another UE). Similarly, antenna 507 and antenna port 505 may be operable to provide transmissions from wireless communication channel 450 (and from UE 430 or another UE) to eNB 410.

[0136] The hardware processing circuit 500 may include various circuits operable according to the various embodiments discussed herein. Figure 5 , the hardware processing circuit 500 may include a first circuit 510 , a second circuit 520 and / or a third circuit 530 .

[0137] In various embodiments, the first circuit 510 is operable to determine a first SRS sequence and a second SRS sequence. The second circuit 520 is operable to process a first UL transmission from the first UE incorporating the first SRS sequence on a first set of subcarrier frequencies. The second circuit 520 is also operable to process a second UL transmission from the second UE incorporating the second SRS sequence on a second set of subcarrier frequencies. The interface 512 is operable to provide information about the first SRS sequence and / or the second SRS sequence to the second circuit 520. The second SRS sequence may include at least a first block overlapping the first set of subcarrier frequencies and a second block not overlapping the first set of subcarrier frequencies. The hardware processing circuit 500 may also include an interface for sending the first transmission and the second transmission to a transmission circuit.

[0138] In some embodiments, the first SRS sequence and the second SRS sequence may be established based on the same ZC sequence.For some embodiments, the first SRS sequence and the first block of the second SRS sequence may be established based on a first ZC sequence, and the second block of the second SRS sequence may be established based on a second ZC sequence.

[0139] For some embodiments, the third circuit 530 is operable to generate a configuration transmission to the first UE including one or more parameters of the first SRS sequence. The third circuit 530 is also operable to generate a configuration transmission to the second UE including one or more parameters of the second SRS sequence. The interface 512 is operable to provide the one or more parameters of the first SRS sequence and / or the one or more parameters of the second SRS sequence to the second circuit 520.

[0140] In some embodiments, the first SRS sequence and the second SRS sequence may be received in the same OFDM symbol.For some embodiments, the first block of the second SRS sequence may have a relative phase rotation with respect to the second block of the second SRS sequence.

[0141] In some embodiments, the first circuit 510, the second circuit 520, and / or the third circuit 530 may be implemented as separate circuits. In other embodiments, the first circuit 510, the second circuit 520, and / or the third circuit 530 may be combined and implemented together in a circuit without changing the essence of the embodiment.

[0142] Figure 6 FIG. 4 shows a hardware processing circuit for a UE supporting BWP according to some embodiments of the present disclosure. Figure 4 , the UE may include various hardware processing circuits discussed herein (e.g., Figure 6 600), which in turn may include logic devices and / or circuits operable to perform various operations. Figure 4 In the embodiment, UE 430 (or various elements or components therein, such as hardware processing circuit 440 or a combination of elements or components therein) may include part or all of these hardware processing circuits.

[0143] In some embodiments, one or more devices or circuits within these hardware processing circuits may be implemented by a combination of software-configured elements and / or other hardware elements. For example, processor 436 (and / or one or more other processors that UE 430 may include), memory 438, and / or other elements or components of UE 430 (which may include hardware processing circuit 440) may be arranged to perform operations of these hardware processing circuits, such as the operations described herein with reference to the devices and circuits within these hardware processing circuits. In some embodiments, processor 436 (and / or one or more other processors that UE 430 may include) may be a baseband processor.

[0144] Return to Figure 6, a device of UE 430 (or another UE or mobile handset) operable to communicate with one or more eNBs on a wireless network may include hardware processing circuitry 600. In some embodiments, hardware processing circuitry 600 may include one or more antenna ports 605 operable to provide various transmissions on a wireless communication channel (such as wireless communication channel 450). Antenna ports 605 may be coupled to one or more antennas 607 (which may be antennas 425). In some embodiments, hardware processing circuitry 600 may incorporate antenna 607, while in other embodiments, hardware processing circuitry 600 may be coupled only to antenna 607.

[0145] Antenna port 605 and antenna 607 are operable to provide signals from a UE to a wireless communication channel and / or an eNB, and are operable to provide signals from an eNB and / or a wireless communication channel to a UE. For example, antenna port 605 and antenna 607 are operable to provide transmissions from UE 430 to wireless communication channel 450 (and from there to eNB 410 or to another eNB). Similarly, antenna 607 and antenna port 605 are operable to provide transmissions from wireless communication channel 450 (and from eNB 410 or another eNB) to UE 430.

[0146] The hardware processing circuit 600 may include various circuits operable according to the various embodiments discussed herein. Figure 6 , the hardware processing circuit 600 may include a first circuit 610 and / or a second circuit 620 .

[0147] The first circuit 610 is operable to process a first configuration transmission carrying an indicator of a BWP spanning at least a portion of a bandwidth of a wireless communication channel between the UE and the gNB. The first circuit 610 is also operable to process a second configuration transmission carrying an indicator of an SRS bandwidth for the BWP. The second circuit 620 is operable to generate an UL transmission for the BWP. The second circuit 620 is also operable to generate an SRS transmission based on the indicator of the SRS bandwidth. The first circuit 610 is operable to provide the indicator of the BWP and / or the indicator of the SRS bandwidth to the second circuit 620 via an interface 612. The hardware processing circuit 600 may also include an interface for receiving a configuration transmission from a receiving circuit and for sending an UL transmission to a transmitting circuit.

[0148] In some embodiments, the BWP may be a first BWP, and the first circuit 610 is further operable to process another configuration transmission carrying an indicator of a second BWP spanning at least a portion of a bandwidth of the wireless communication channel. The UL transmission may be for one of the first BWP or the second BWP.

[0149] For some embodiments, the first circuit 610 is further operable to process a DCI transmission carrying an activated BWP indicator for establishing a configured BWP for the UL transmission.

[0150] In some embodiments, the first circuit 610 is further operable to process a third configuration transmission carrying an indicator of one or more SRS configurations for the BWP.

[0151] For some embodiments, the SRS bandwidth may correspond to a bandwidth portion of at least 120 PRBs. In some embodiments, the SRS bandwidth may be selected from a group of bandwidths, the group of bandwidths comprising: 120 PRBs, 60 PRBs, 20 PRBs, or 4 PRBs. In some embodiments, the SRS bandwidth may be selected from a group of bandwidths, the group of bandwidths comprising: 192 PRBs, 24 PRBs, 8 PRBs, or 4 PRBs.

[0152] In some embodiments, the total number of UE-specific SRS transmission symbols for a configured SRS resource may be accumulated over multiple slots over which the resource is configured.

[0153] In some embodiments, the first circuit 610 and / or the second circuit 620 may be implemented as separate circuits. In other embodiments, the first circuit 610 and / or the second circuit 620 may be combined in a circuit and implemented together without changing the essence of the described embodiments.

[0154] Figure 7 A method of an eNB for flexible SRS sequence design according to some embodiments of the present disclosure is shown. Figure 4 , various methods that may involve the eNB 410 and the hardware processing circuit 420 are discussed herein. Figure 7 The actions in method 700 are shown in a particular order, but the order of the actions may be modified. Therefore, the illustrated embodiments may be performed in a different order, and some actions may be performed in parallel. According to some embodiments, Figure 7 Some of the actions and / or operations listed in are optional. The numbering of the actions presented is for clarity and is not intended to describe the order in which the various actions must occur. In addition, the operations from the various flows can be utilized in various combinations.

[0155] Furthermore, in some embodiments, the machine-readable storage medium may have executable instructions that, when executed, cause the eNB 410 and / or the hardware processing circuit 420 to perform operations including: Figure 7Such machine-readable storage media may include any of a variety of storage media, such as magnetic storage media (e.g., magnetic tapes or disks), optical storage media (e.g., optical disks), electronic storage media (e.g., conventional hard drives, solid-state disk drives, or flash-based storage media), or any other tangible storage media or non-transitory storage media.

[0156] In some embodiments, an apparatus may include a device for performing Figure 7 The various actions and / or operations of the described methods.

[0157] Return to Figure 7 Various methods may be according to various embodiments discussed herein. Method 700 may include determining 710, processing 715, and processing 720. Method 700 may also include generating 730 and / or generating 735.

[0158] In determining 710, a first SRS sequence and a second SRS sequence may be determined. In process 715, a first UL transmission from the first UE incorporating the first SRS sequence on a first set of subcarrier frequencies may be processed. In process 720, a second UL transmission from the second UE incorporating the second SRS sequence on a second set of subcarrier frequencies may be processed. The second SRS sequence may include at least a first block overlapping the first set of subcarrier frequencies and a second block not overlapping the first set of subcarrier frequencies.

[0159] In some embodiments, the first SRS sequence and the second SRS sequence may be established based on the same ZC sequence.For some embodiments, the first SRS sequence and the first block of the second SRS sequence may be established based on a first ZC sequence, and the second block of the second SRS sequence may be established based on a second ZC sequence.

[0160] At generate 730, a configuration transmission to the first UE including one or more parameters for the first SRS sequence may be generated. At generate 735, a configuration transmission to the second UE including one or more parameters for the second SRS sequence may be generated.

[0161] In some embodiments, the first SRS sequence and the second SRS sequence may be received in the same OFDM symbol.For some embodiments, the first block of the second SRS sequence may have a relative phase rotation with respect to the second block of the second SRS sequence.

[0162] Figure 8 A method for a UE supporting BWP according to some embodiments of the present disclosure is shown. Figure 4, methods that may involve UE 430 and hardware processing circuit 440 are discussed herein. Figure 8 The actions in method 800 are shown in a particular order, but the order of the actions may be modified. Therefore, the illustrated embodiments may be performed in a different order, and some actions may be performed in parallel. According to some embodiments, Figure 8 Some of the actions and / or operations listed in are optional. The numbering of the actions presented is for clarity and is not intended to describe the order in which the operations in which the various actions must occur. In addition, the operations from the various flows described can be utilized in various combinations.

[0163] Furthermore, in some embodiments, the machine-readable storage medium may have executable instructions that, when executed, cause the UE 430 and / or the hardware processing circuit 440 to perform operations including: Figure 8 Such machine-readable storage media may include any of a variety of storage media, such as magnetic storage media (e.g., magnetic tapes or disks), optical storage media (e.g., optical disks), electronic storage media (e.g., traditional hard drives, solid-state disk drives, or flash-based storage media), or any other tangible storage media or non-transitory storage media.

[0164] In some embodiments, an apparatus may include a device for performing Figure 8 The various actions and / or operations of the described methods.

[0165] Return to Figure 8 , various methods may be according to the various embodiments discussed herein. Method 800 may include process 810, process 815, generating 820, and generating 825. Method 800 may also include process 830, process 940, and / or process 850.

[0166] In process 810, a first configuration transmission carrying an indicator of a BWP spanning at least a portion of a bandwidth of a wireless communication channel between the UE and the gNB may be processed. In process 815, a second configuration transmission carrying an indicator of an SRS bandwidth for the BWP may be processed. In generation 820, a UL transmission for the BWP may be generated. In generation 825, an SRS transmission based on the indicator of the SRS bandwidth may be generated.

[0167] In some embodiments, the BWP may be a first BWP, and another configuration transmission carrying an indicator of a second BWP spanning at least a portion of a bandwidth of the wireless communication channel may be generated in process 830. The UL transmission may be for one of: the first BWP or the second BWP.

[0168] For some embodiments, in process 840, a DCI transmission carrying an activated BWP indicator for establishing a configured BWP for the UL transmission may be processed.

[0169] In some embodiments, at process 850, a third configuration transmission carrying an indicator of one or more SRS configurations for the BWP may be processed.

[0170] For some embodiments, the SRS bandwidth may correspond to a bandwidth portion of at least 120 PRBs. In some embodiments, the SRS bandwidth may be selected from a group of bandwidths, the group of bandwidths comprising: 120 PRBs, 60 PRBs, 20 PRBs, or 4 PRBs. In some embodiments, the SRS bandwidth may be selected from a group of bandwidths, the group of bandwidths comprising: 192 PRBs, 24 PRBs, 8 PRBs, or 4 PRBs.

[0171] In some embodiments, the total number of UE-specific SRS transmission symbols for a configured SRS resource may be accumulated over multiple slots over which the resource is configured.

[0172] Fig. 9 Example components of an apparatus according to some embodiments of the present disclosure are shown. In some embodiments, the apparatus 900 may include an application circuit 902, a baseband circuit 904, a radio frequency (RF) circuit 906, a front-end module (FEM) circuit 908, one or more antennas 910, and a power management circuit (PMC) 912 coupled together at least as shown. The components of the apparatus 900 shown may be included in a UE or a RAN node. In some embodiments, the apparatus 900 may include fewer elements (e.g., the RAN node may not utilize the application circuit 902, but may include a processor / controller to process IP data received from the EPC). In some embodiments, the apparatus 900 may include additional elements, such as memory, storage, display, camera, sensor, or input / output (I / O) interface. In other embodiments, the components described below may be included in more than one apparatus (e.g., the circuit may be separately included in more than one apparatus for cloud-RAN (C-RAN) implementation).

[0173] The application circuit 902 may include one or more application processors. For example, the application circuit 902 may include circuits such as, but not limited to, one or more single-core or multi-core processors. The processor may include any combination of a general-purpose processor and a dedicated processor (e.g., a graphics processor, an application processor, etc.). The processor may be coupled to a memory / storage, or may include a memory / storage and may be configured to execute instructions stored in the memory / storage to enable various applications or operating systems to run on the device 900. In some embodiments, the processor of the application circuit 902 may process an IP packet received from the EPC.

[0174] The baseband circuit 904 may include circuits such as, but not limited to, one or more single-core or multi-core processors. The baseband circuit 904 may include one or more baseband processors or control logic to process baseband signals received from the receive signal path of the RF circuit 906 and generate baseband signals for the transmit signal path of the RF circuit 906. The baseband processing circuit 904 may interface with the application circuit 902 for the generation and processing of the baseband signals and for controlling the operation of the RF circuit 906. For example, in some embodiments, the baseband circuit 904 may include a third generation (3G) baseband processor 904A, a fourth generation (4G) baseband processor 904B, a fifth generation (5G) baseband processor 904C, or other baseband processors 904D for other existing generations, generations under development, or generations to be developed in the future (e.g., second generation (2G), sixth generation (6G), etc.). The baseband circuit 904 (e.g., one or more of the baseband processors 904A-D) may handle various radio control functions that enable communication with one or more radio networks via the RF circuit 906. In other embodiments, some or all of the functions of the baseband processors 904A-D may be included in a module that is stored in the memory 904G and executed via the central processing unit (CPU) 904E. The radio control functions may include, but are not limited to, signal modulation / demodulation, encoding / decoding, radio frequency shifting, etc. In some embodiments, the modulation / demodulation circuit of the baseband circuit 904 may include fast Fourier transform (FFT), precoding, or concatenation mapping / demapping functions. In some embodiments, the encoding / decoding circuit of the baseband circuit 904 may include convolution, tail-biting convolution, turbo, Viterbi, or low-density parity check (LDPC) encoder / decoder functions. The embodiments of the modulation / demodulation and encoder / decoder functions are not limited to these examples, and may include other suitable functions in other embodiments.

[0175] In some embodiments, the baseband circuit 904 may include one or more audio digital signal processors (DSPs) 904F. The audio DSP 904F may include elements for compression / decompression and echo cancellation, and in other embodiments, may include other suitable processing elements. In some embodiments, the components of the baseband circuit may be appropriately combined in a single chip, a single chipset, or arranged on the same circuit board. In some embodiments, some or all of the components of the baseband circuit 904 and the application circuit 902 may be implemented together, for example, on a system on a chip (SOC).

[0176] In some embodiments, the baseband circuit 904 can provide communications compatible with one or more radio technologies. For example, in some embodiments, the baseband circuit 904 can support communications with an Evolved Common Terrestrial Radio Access Network (EUTRAN) or other wireless metropolitan area network (WMAN), a wireless local area network (WLAN), a wireless personal area network (WPAN). Embodiments in which the baseband circuit 904 is configured to support radio communications of more than one wireless protocol can be referred to as multi-mode baseband circuits.

[0177] The RF circuit 906 may enable communication with a wireless network using modulated electromagnetic radiation through a non-solid medium. In various embodiments, the RF circuit 906 may include switches, filters, amplifiers, etc. to facilitate communication with the wireless network. The RF circuit 906 may include a receive signal path, which may include circuitry that down-converts an RF signal received from the FEM circuit 908 and provides a baseband signal to the baseband circuit 904. The RF circuit 906 may also include a transmit signal path, which may include circuitry that up-converts a baseband signal provided by the baseband circuit 904 and provides an RF output signal to the FEM circuit 908 for transmission.

[0178] In some embodiments, the receive signal path of the RF circuit 906 may include a mixer circuit 906A, an amplifier circuit 906B, and a filter circuit 906C. In some embodiments, the transmit signal path of the RF circuit 906 may include a filter circuit 906C and a mixer circuit 906A. The RF circuit 906 may also include a synthesizer circuit 906D for synthesizing frequencies used by the mixer circuit 906A of the receive signal path and the transmit signal path. In some embodiments, the mixer circuit 906A of the receive signal path may be configured to down-convert the RF signal received from the FEM circuit 908 based on the synthesized frequency provided by the synthesizer circuit 906D. The amplifier circuit 906B may be configured to amplify the down-converted signal, and the filter circuit 906C may be a low pass filter (LPF) or a band pass filter (BPF) configured to remove unwanted signals from the down-converted signal to generate an output baseband signal. The output baseband signal may be provided to the baseband circuit 904 for further processing. In some embodiments, the output baseband signal may be a zero frequency baseband signal, although this is not a requirement.In some embodiments, the mixer circuit 906A of the receive signal path may include a passive mixer, although the scope of the embodiments is not limited in this respect.

[0179] In some embodiments, the mixer circuit 906A of the transmit signal path may be configured to frequency up-convert an input baseband signal based on the synthesis provided by the synthesizer circuit 906D to generate an RF output signal for the FEM circuit 908. The baseband signal may be provided by the baseband circuit 904 and may be filtered by the filter circuit 906C.

[0180] In some embodiments, the mixer circuit 906A of the receive signal path and the mixer circuit 906A of the transmit signal path may include two or more mixers and may be configured for quadrature down-conversion and quadrature up-conversion, respectively. In some embodiments, the mixer circuit 906A of the receive signal path and the mixer circuit 906A of the transmit signal path may include two or more mixers and may be configured for image rejection (e.g., Hartley image rejection). In some embodiments, the mixer circuit 906A of the receive signal path and the mixer circuit 906A of the transmit signal path may be configured for direct down-conversion and direct up-conversion, respectively. In some embodiments, the mixer circuit 906A of the receive signal path and the mixer circuit 906A of the transmit signal path may be configured for superheterodyne operation.

[0181] In some embodiments, the output baseband signal and the input baseband signal may be analog baseband signals, although the scope of the embodiments is not limited in this respect. In some alternative embodiments, the output baseband signal and the input baseband signal may be digital baseband signals. In these alternative embodiments, the RF circuit 906 may include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuits, and the baseband circuit 904 may include a digital baseband interface to communicate with the RF circuit 906.

[0182] In some dual-mode embodiments, separate radio IC circuits may be provided for processing signals for each spectrum, although the scope of the embodiments is not limited in this respect.

[0183] In some embodiments, the synthesizer circuit 906D may be a fractional-N synthesizer or a fractional-N / N+1 synthesizer, although the scope of the embodiments is not limited in this respect, as other types of frequency synthesizers may be suitable. For example, the synthesizer circuit 906D may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer including a phase-locked loop with a frequency divider.

[0184] The synthesizer circuit 906D may be configured to synthesize an output frequency based on a frequency input and a divider control input for use by the mixer 906A of the RF circuit 906. In some embodiments, the synthesizer circuit 906D may be a fractional-N / N+1 synthesizer.

[0185] In some embodiments, the frequency input may be provided by a voltage controlled oscillator (VCO), although this is not a requirement. The divider control input may be provided by the baseband circuit 904 or the application processor 902 depending on the desired output frequency. In some embodiments, the divider control input (e.g., N) may be determined from a lookup table based on the channel indicated by the application processor 902.

[0186] The synthesizer circuit 906D of the RF circuit 906 may include a frequency divider, a delay locked loop (DLL), a multiplexer, and a phase accumulator. In some embodiments, the frequency divider may be a dual-modulus frequency divider (DMD), and the phase accumulator may be a digital phase accumulator (DPA). In some embodiments, the DMD may be configured to divide the input signal by N or N+1 (e.g., based on a carry) to provide a fractional division ratio. In some example embodiments, the DLL may include a set of cascaded, tunable, delay elements, a phase detector, a charge pump, and a D-type flip-flop. In these embodiments, the delay element may be configured to divide the VCO cycle into Nd equal phase packets, where Nd is the number of delay elements in the delay line. In this way, the DLL provides negative feedback to help ensure that the total delay through the delay line is one VCO cycle.

[0187] In some embodiments, the synthesizer circuit 906D can be configured to generate a carrier frequency as an output frequency, while in other embodiments, the output frequency can be a multiple of the carrier frequency (e.g., twice the carrier frequency, four times the carrier frequency) and used in conjunction with a quadrature generator and divider circuit to generate multiple signals at the carrier frequency with multiple different phases relative to each other. In some embodiments, the output frequency can be an LO frequency (fLO). In some embodiments, the RF circuit 906 can include an IQ / polarity converter.

[0188] The FEM circuitry 908 may include a receive signal path that may include circuitry configured to operate on RF signals received from one or more antennas 910, amplify the received signals, and provide the amplified versions of the received signals to the RF circuitry 906 for further processing. The FEM circuitry 908 may also include a transmit signal path that may include circuitry configured to amplify signals for transmission provided by the RF circuitry 906 for transmission through one or more of the one or more antennas 910. In various embodiments, the amplification by the transmit signal path or the receive signal path may be performed only in the RF circuitry 906, only in the FEM 908, or in both the RF circuitry 906 and the FEM 908.

[0189] In some embodiments, the FEM circuit 908 may include a TX / RX switch to switch between transmit mode operation and receive mode operation. The FEM circuit may include a receive signal path and a transmit signal path. The receive signal path of the FEM circuit may include an LNA to amplify the received RF signal and provide the amplified received RF signal as an output (e.g., to the RF circuit 906). The transmit signal path of the FEM circuit 908 may include a power amplifier (PA) to amplify the input RF signal (e.g., provided by the RF circuit 906) and one or more filters to generate an RF signal for subsequent transmission (e.g., transmission through one or more of the one or more antennas 910).

[0190] In some embodiments, the PMC 912 may manage the power provided to the baseband circuit 904. In particular, the PMC 912 may control power selection, voltage scaling, battery charging, or DC to DC conversion. When the apparatus 900 is capable of being powered by a battery, such as when the apparatus is included in a UE, the PMC 912 may often be included. The PMC 912 may improve the power conversion efficiency while providing the desired implementation size and heat dissipation characteristics.

[0191] Although Fig. 9 The PMC 912 is shown coupled only to the baseband circuit 904. However, in other embodiments, the PMC 912 may additionally or alternatively be coupled to and perform similar power management operations for other components such as, but not limited to, the application circuit 902, the RF circuit 906, or the FEM 908.

[0192] In some embodiments, the PMC 912 may control or otherwise be part of various power saving mechanisms of the device 900. For example, if the device 900 is in an RRC connected state, where it remains connected to the RAN node with the expectation of receiving traffic immediately, then after a period of inactivity it may enter a state known as discontinuous reception mode (DRX). During this state, the device 900 may be powered down for short intervals and thereby save power.

[0193] If there is no data traffic activity for an extended period of time, the device 900 may transition to the shutdown to RRC idle state, where it is disconnected from the network and does not perform operations such as channel quality feedback, handover, etc. The device 900 enters a very low power state, and it performs paging, where it wakes up again periodically to listen to the network and then powers down again. The device 900 cannot receive data in this state, and in order to receive data, it must transition back to the RRC connected state.

[0194] An additional power saving mode may allow a device to be unavailable to the network for a period exceeding the paging interval (from a few seconds to a few hours). During this time, the device is completely unable to access the network and may be completely powered off. Any data sent during this time will incur a large delay, and it is assumed that this delay is acceptable.

[0195] The processor of the application circuit 902 and the processor of the baseband circuit 904 can be used to execute elements of one or more instances of the protocol stack. For example, the processor of the baseband circuit 904 can be used alone or in combination to perform layer 3 functions, layer 2 functions, or layer 1 functions, and the processor of the application circuit 904 can utilize data (e.g., data packets) received from these layers and further perform layer 4 functions (e.g., transport communication protocol (TCP) and user datagram protocol (UDP) layers). As referred to herein, layer 3 may include a radio resource control (RRC) layer, which is further described in detail below. As referred to herein, layer 2 may include a media access control (MAC) layer, a radio link control (RLC) layer, and a packet data convergence protocol (PDCP) layer, which are further described in detail below. As referred to herein, layer 1 may include a physical (PHY) layer of a UE / RAN node, which is further described in detail below.

[0196] Fig.10 1 shows an example interface of a baseband circuit according to some embodiments of the present disclosure. As discussed above, Fig. 9 The baseband circuit 904 may include processors 904A-904E and a memory 904G used by the processors. Each of the processors 904A-904E may include a memory interface 1004A-1004E, respectively, to send / receive data to / from the memory 904G.

[0197] The baseband circuit 904 may further include one or more interfaces to communicatively couple to other circuits / devices, such as a memory interface 1012 (e.g., an interface for sending / receiving data to / from a memory external to the baseband circuit 904), an application circuit interface 1014 (e.g., an interface for sending / receiving data to / from a memory external to the baseband circuit 904), Fig. 9The application circuit 902 sends / receives data through an interface), an RF circuit interface 1016 (eg, to / from Fig. 9 RF circuit 906 to send / receive data), wireless hardware connection interface 1018 (for example, to / from near field communication (NFC) component, Bluetooth component Components (e.g., Bluetooth components Low energy), components and other communication components to send / receive data) and a power management interface 1020 (for example, an interface for sending / receiving power or control signals to / from the PMC 912).

[0198] It should be noted that, in various embodiments, elements of any figure herein having the same reference numbers and / or names as elements of any other figure herein may operate or function in a manner similar to (but not limited to operating or functioning in) those elements of the other figures herein.

[0199] References in this specification to "an embodiment," "one embodiment," "some embodiments," or "other embodiments" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least some embodiments, but not necessarily all embodiments. Various appearances of "an embodiment," "one embodiment," or "some embodiments" do not necessarily refer to the same embodiment. If the specification states that a component, characteristic, structure, or feature "may," "might," or "could" be included, that particular component, characteristic, structure, or feature need not be included. If the specification or claims refer to "a" or "an" element, that does not mean that there is only one of the elements. If the specification or claims refer to "additional" elements, that does not exclude the presence of more than one of the additional elements.

[0200] In addition, in one or more embodiments, the specific characteristics, structures, functions or features may be combined in any suitable manner. For example, the first embodiment may be combined with the second embodiment, as long as the specific characteristics, structures, functions or features associated with the two embodiments are not mutually exclusive.

[0201] Although the present disclosure has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of such embodiments will be apparent to those of ordinary skill in the art from the foregoing description. For example, other memory architectures, such as dynamic RAM (DRAM), may use the embodiments discussed. The embodiments of the present disclosure are intended to encompass all such alternatives, modifications, and variations that fall within the broad scope of the appended claims.

[0202] In addition, for simplicity of illustration and discussion, and in order not to obscure the present disclosure, well-known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the presented figures. In addition, the arrangement may be shown in the form of a block diagram in order to avoid obscuring the present disclosure, and also in view of the fact that the implementation of such a block diagram arrangement is highly dependent on the platform in which the present disclosure is to be implemented (i.e., such details should be within the capabilities of those skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the present disclosure, it should be apparent to those skilled in the art that the present disclosure may be practiced without or with variations of these specific details. Therefore, this description should be considered illustrative, not restrictive.

[0203] The following examples relate to further embodiments. The details in the examples may be used anywhere in one or more embodiments. All optional features of the apparatus described herein may also be implemented with respect to a method or process.

[0204] Example 1 provides a fifth generation evolved Node B (gNB) device operable to communicate with a first user equipment (UE) and a second UE on a wireless network, comprising: one or more processors for: determining a first sounding reference signal (SRS) sequence and a second SRS sequence; processing a first uplink (UL) transmission from the first UE incorporating the first SRS sequence on a first set of subcarrier frequencies; and processing a second UL transmission from the second UE incorporating the second SRS sequence on a second set of subcarrier frequencies, wherein the second SRS sequence includes at least a first block overlapping the first set of subcarrier frequencies and a second block not overlapping the first set of subcarrier frequencies; and an interface for sending the first transmission and the second transmission to a transmission circuit.

[0205] In Example 2, according to the apparatus of Example 1, the first SRS sequence and the second SRS sequence are established based on the same ZC sequence.

[0206] In Example 3, according to the apparatus of Example 1, wherein the first block of the first SRS sequence and the second SRS sequence is established based on a first ZC sequence; and wherein the second block of the second SRS sequence is established based on a second ZC sequence.

[0207] In Example 4, according to a device according to any one of Examples 1 to 3, the one or more processors are used to: generate a configuration transmission to the first UE including one or more parameters of the first SRS sequence; and generate a configuration transmission to the second UE including one or more parameters of the second SRS sequence.

[0208] In Example 5, the apparatus of any one of Examples 1 to 4, wherein the first SRS sequence and the second SRS sequence are received in the same orthogonal frequency division multiplexing (OFDM) symbol.

[0209] In Example 6, according to the apparatus of any one of Examples 1 to 4, the first block of the second SRS sequence has a relative phase rotation with respect to the second block of the second SRS sequence.

[0210] Example 7 provides an evolved Node B (eNB) device, comprising an application processor, a memory, one or more antenna ports, and an interface for allowing the application processor to communicate with another device, the eNB device comprising an apparatus according to any one of Examples 1 to 6.

[0211] Example 8 provides a machine-readable storage medium having machine-executable instructions, which, when executed, cause one or more processors of a fifth-generation evolved Node B (gNB) operable to communicate with a first user equipment (UE) and a second UE on a wireless network to perform operations, the operations comprising: determining a first sounding reference signal (SRS) sequence and a second SRS sequence; processing a first uplink (UL) transmission from the first UE incorporating the first SRS sequence on a first set of subcarrier frequencies; and processing a second UL transmission from the second UE incorporating the second SRS sequence on a second set of subcarrier frequencies, wherein the second SRS sequence includes at least a first block overlapping the first set of subcarrier frequencies and a second block not overlapping the first set of subcarrier frequencies.

[0212] In Example 9, according to the machine-readable storage medium of Example 8, the first SRS sequence and the second SRS sequence are established based on the same ZC sequence.

[0213] In Example 10, according to the machine-readable storage medium of Example 8, the first block of the first SRS sequence and the second SRS sequence is established based on a first ZC sequence; and wherein the second block of the second SRS sequence is established based on a second ZC sequence.

[0214] In Example 11, according to the machine-readable storage medium of any one of Examples 8 to 10, the operation includes: generating a configuration transmission to the first UE including one or more parameters of the first SRS sequence; and generating a configuration transmission to the second UE including one or more parameters of the second SRS sequence.

[0215] In Example 12, the machine-readable storage medium of any one of Examples 8 to 11, wherein the first SRS sequence and the second SRS sequence are received in the same orthogonal frequency division multiplexing (OFDM) symbol.

[0216] In Example 13, according to any one of Examples 8 to 11, the machine-readable storage medium, wherein the first block of the second SRS sequence has a relative phase rotation relative to the second block of the second SRS sequence.

[0217] Example 14 provides a device of a user equipment (UE) operable to communicate with a fifth generation evolved Node B (gNB) on a wireless network, comprising: one or more processors for: processing a first configuration transmission, the first configuration transmission carrying an indicator of a bandwidth part (BWP) spanning at least a portion of the bandwidth of a wireless communication channel between the UE and the gNB; processing a second configuration transmission, the second configuration transmission carrying an indicator of a sounding reference signal (SRS) bandwidth for the BWP; generating an uplink (UL) transmission for the BWP; and generating an SRS transmission based on the indicator of the SRS bandwidth, and an interface for receiving the configuration transmission from a receiving circuit and for sending the UL transmission to a transmitting circuit.

[0218] In Example 15, the apparatus of Example 14, wherein the BWP is a first BWP, and wherein the one or more processors are used to: process another configuration transmission, the other configuration transmission carrying an indicator of a second BWP spanning at least a portion of the bandwidth of the wireless communication channel; wherein the UL transmission is for one of the first BWP or the second BWP.

[0219] In Example 16, the apparatus of Example 15, wherein the one or more processors are used to: process a downlink control information (DCI) transmission carrying an activated BWP indicator for establishing a configured BWP for the UL transmission.

[0220] In Example 17, the apparatus of any one of Examples 14 to 15, wherein the one or more processors are configured to: process a third configuration transmission carrying an indicator of one or more SRS configurations for the BWP.

[0221] In Example 18, the apparatus of any one of Examples 14 to 17, wherein the SRS bandwidth corresponds to a bandwidth portion of at least 120 physical resource blocks (PRBs).

[0222] In Example 19, the apparatus of Example 18, wherein the SRS bandwidth is selected from a group of bandwidths, the group of bandwidths comprising: 120 PRBs, 60 PRBs, 20 PRBs, or 4 PRBs.

[0223] In Example 20, the apparatus of Example 18, wherein the SRS bandwidth is selected from a group of bandwidths, the group of bandwidths comprising: 192 PRBs, 24 PRBs, 8 PRBs, or 4 PRBs.

[0224] In Example 21, the apparatus of any one of Examples 14 to 20, wherein a total number of UE-specific SRS transmission symbols for the configured SRS resources is accumulated over a plurality of time slots on which the resources are configured.

[0225] Example 22 provides a user equipment (UE) device, which includes an application processor, a memory, one or more antennas, a wireless interface for allowing the application processor to communicate with another device, and a touch screen display, wherein the UE device includes the device described in any one of Examples 14 to Example 21.

[0226] Example 23 provides a machine-readable storage medium having machine-executable instructions, which, when executed, cause one or more processors of a user equipment (UE) operable to communicate with a fifth-generation evolved Node B (gNB) on a wireless network to perform operations, the operations comprising: processing a first configuration transmission, the first configuration transmission carrying an indicator of a bandwidth part (BWP) spanning at least a portion of the bandwidth of a wireless communication channel between the UE and the gNB; processing a second configuration transmission, the second configuration transmission carrying an indicator of a sounding reference signal (SRS) bandwidth for the BWP; generating an uplink (UL) transmission for the BWP; and generating an SRS transmission based on the indicator of the SRS bandwidth.

[0227] In Example 24, according to the machine-readable storage medium of Example 23, wherein the BWP is a first BWP, the operation includes: processing another configuration transmission, the other configuration transmission carrying an indicator of a second BWP spanning at least a portion of the bandwidth of the wireless communication channel; wherein the UL transmission is for one of the first BWP or the second BWP.

[0228] In Example 25, according to the machine-readable storage medium of Example 24, the operation includes: processing a downlink control information (DCI) transmission, the downlink control information (DCI) transmission carrying an activated BWP indicator for establishing a configured BWP for the UL transmission.

[0229] In Example 26, according to the machine-readable storage medium of any one of Examples 23 to 24, the operation includes: processing a third configuration transmission, the third configuration transmission carrying an indicator of one or more SRS configurations for the BWP.

[0230] In Example 27, the machine-readable storage medium of any one of Examples 23 to 26, wherein the SRS bandwidth corresponds to a bandwidth portion of at least 120 physical resource blocks (PRBs).

[0231] In Example 28, the machine-readable storage medium of Example 27, wherein the SRS bandwidth is selected from a group of bandwidths, the group of bandwidths comprising: 120 PRBs, 60 PRBs, 20 PRBs, or 4 PRBs.

[0232] In Example 29, the machine-readable storage medium of any one of Example 27, wherein the SRS bandwidth is selected from a group of bandwidths, the group of bandwidths comprising: 192 PRBs, 24 PRBs, 8 PRBs, or 4 PRBs.

[0233] In Example 30, a machine-readable storage medium according to any one of Examples 23 to 29, wherein a total number of UE-specific SRS transmission symbols for the configured SRS resources is accumulated over multiple time slots on which the SRS resources are configured.

[0234] In Example 31, the apparatus of any one of Examples 1 to 6 and 14 to 21, wherein the one or more processors include a baseband processor.

[0235] In Example 32, the apparatus of any one of Examples 1 to 6 and 14 to 21 comprises a memory for storing instructions, the memory being coupled to the one or more processors.

[0236] In Example 33, the apparatus of any one of Examples 1 to 6 and 14 to 21 includes a transceiver circuit for at least one of: generating a transmission, encoding a transmission, processing a transmission, or decoding a transmission.

[0237] In Example 34, the apparatus of any one of Examples 1 to 6 and 14 to 21 includes a transceiver circuit for generating a transmission and processing the transmission.

[0238] An abstract is provided that allows the reader to determine the nature and gist of the technical disclosure. This abstract is submitted with the understanding that it will not be used to limit the scope or meaning of the claims. The appended claims are hereby incorporated into the detailed description, with each claim standing on its own as a separate embodiment.

Claims

1. A base station BS operable to communicate with a first user equipment UE and a second UE on a wireless network, comprising: One or more processors configured to: Determine a first sounding reference signal SRS sequence and a second SRS sequence, wherein at least one of the first SRS sequence or the second SRS sequence is a truncated portion of a Zadoff-Chu, i.e., a ZC sequence, associated with a bandwidth of the entire system; processing a first uplink (UL) transmission from the first UE incorporating the first SRS sequence on a first set of subcarrier frequencies; and processing a second UL transmission from the second UE incorporating the second SRS sequence on a second set of subcarrier frequencies, The second SRS sequence at least includes a first group of physical resource blocks (PRBs) overlapping with the first group of subcarrier frequencies and a second group of PRBs not overlapping with the first group of subcarrier frequencies, and An interface is used to send the first UL transmission and the second UL transmission to a transmission circuit.

2. The BS according to claim 1, wherein: The first SRS sequence and the second SRS sequence are established based on the same ZC sequence.

3. The BS according to claim 1, in, The first group of PRBs of the first SRS sequence and the second SRS sequence are established based on a first ZC sequence; and The second group of PRBs of the second SRS sequence is established based on a second ZC sequence.

4. The BS according to claim 1, wherein: The one or more processors are further configured to: generating a configuration transmission to the first UE including one or more parameters of the first SRS sequence; and A configuration transmission is generated to the second UE that includes one or more parameters of the second SRS sequence.

5. The BS according to claim 1, wherein: The first SRS sequence and the second SRS sequence are received in the same orthogonal frequency division multiplexing (OFDM) symbol.

6. The BS according to claim 1, wherein: The first set of PRBs of the second SRS sequence has a relative phase rotation with respect to the second set of PRBs of the second SRS sequence.

7. A machine-readable storage medium having machine-executable instructions, which, when executed, cause one or more processors of a base station BS operable to communicate with a first user equipment UE and a second UE on a wireless network to perform one or more operations, the one or more operations comprising: Determine a first sounding reference signal SRS sequence and a second SRS sequence, wherein at least one of the first SRS sequence or the second SRS sequence is a truncated portion of a Zadoff-Chu, i.e., a ZC sequence, associated with a bandwidth of the entire system; processing a first uplink (UL) transmission from the first UE incorporating the first SRS sequence on a first set of subcarrier frequencies; and processing a second UL transmission from the second UE incorporating the second SRS sequence on a second set of subcarrier frequencies, The second SRS sequence at least includes a first group of physical resource blocks PRBs overlapping with the first group of subcarrier frequencies and a second group of PRBs not overlapping with the first group of subcarrier frequencies.

8. The machine-readable storage medium according to claim 7, wherein: The first SRS sequence and the second SRS sequence are established based on the same ZC sequence.

9. The machine-readable storage medium according to claim 7, in, The first group of PRBs of the first SRS sequence and the second SRS sequence are established based on a first ZC sequence; and The second group of PRBs of the second SRS sequence is established based on a second ZC sequence.

10. The machine-readable storage medium of claim 7, wherein the one or more operations further comprise: generating a configuration transmission to the first UE including one or more parameters of the first SRS sequence; as well as A configuration transmission is generated to the second UE that includes one or more parameters of the second SRS sequence.

11. The machine-readable storage medium according to claim 7, wherein: The first SRS sequence and the second SRS sequence are received in the same orthogonal frequency division multiplexing (OFDM) symbol.

12. The machine-readable storage medium according to claim 7, wherein: The first set of PRBs of the second SRS sequence has a relative phase rotation with respect to the second set of PRBs of the second SRS sequence.

13. A method performed by one or more processors of a base station BS operable to communicate with a first user equipment UE and a second UE over a wireless network, comprising: Determine a first sounding reference signal SRS sequence and a second SRS sequence, wherein at least one of the first SRS sequence or the second SRS sequence is a truncated portion of a Zadoff-Chu, i.e., a ZC sequence, associated with a bandwidth of the entire system; processing a first uplink (UL) transmission from the first UE incorporating the first SRS sequence on a first set of subcarrier frequencies; and processing a second UL transmission from the second UE incorporating the second SRS sequence on a second set of subcarrier frequencies, The second SRS sequence at least includes a first group of physical resource blocks PRBs overlapping with the first group of subcarrier frequencies and a second group of PRBs not overlapping with the first group of subcarrier frequencies.

14. The method according to claim 13, wherein: The first SRS sequence and the second SRS sequence are established based on the same ZC sequence.

15. The method according to claim 13, in, The first group of PRBs of the first SRS sequence and the second SRS sequence are established based on a first ZC sequence; and The second group of PRBs of the second SRS sequence is established based on a second ZC sequence.

16. The method according to claim 13, further comprising: generating a configuration transmission to the first UE including one or more parameters of the first SRS sequence; as well as A configuration transmission is generated to the second UE that includes one or more parameters of the second SRS sequence.

17. The method according to claim 13, wherein: The first SRS sequence and the second SRS sequence are received in the same orthogonal frequency division multiplexing (OFDM) symbol.

18. The method according to claim 13, wherein: The first set of PRBs of the second SRS sequence has a relative phase rotation with respect to the second set of PRBs of the second SRS sequence.

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