Dynamic switching between multiple transmission reception points and single transmission reception point

Abstract

Systems, methods, apparatus, and computer program products enabling dynamic switching between multiple transport receiver points (multiple TRPs) and single transport receiver points (single TRPs) are available. One method may include receiving a first instruction in downlink control information or a media access control element. The method may further include, at the user equipment, determining, based on the first instruction, whether to apply a multiple transport receiver point physical uplink shared channel scheme or a single transport receiver point physical uplink shared channel scheme for transmitting transport blocks. Furthermore, the method may include interpreting at least one downlink control information field differently depending on whether a single transport receiver point physical uplink shared channel scheme or a multiple transport receiver point physical uplink shared channel scheme is applicable.

Description

Technical Field

[0001] Some example embodiments may generally relate to mobile or wireless telecommunication systems, such as Long Term Evolution (LTE) or 5G radio access technologies or New Radio (NR) access technologies, or may relate to other communication systems. For example, some example embodiments may relate to apparatus, systems, and / or methods for enabling dynamic switching between multiple transmit receivers and a single transmit receiver. Background Technology

[0002] Examples of mobile or wireless telecommunications systems can include Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN), Evolved UTRAN (E-UTRAN) for Long Term Evolution (LTE), LTE-A Advanced, MulteFire, LTE-A Pro, and / or 5G or New Radio (NR) access technologies. 5G refers to Next Generation (NG) radio systems and network architectures. While 5G is primarily built on NR, 5G (or NG) networks can also be built on E-UTRAN radio. NR is estimated to offer bit rates in the 10-20 Gbit / s range or higher and will support at least enhanced mobile broadband (eMBB) and ultra-reliable low-latency communication (URLLC) as well as massive machine-type communication (mMTC). NR promises to enable extreme broadband and ultra-robust low-latency connectivity and massive networking to support the Internet of Things (IoT). As IoT and machine-to-machine (M2M) communications become increasingly prevalent, there will be a growing need for networks that meet the demands for lower power, lower data rates, and longer battery life. Note that in 5G, a node that can provide radio access to user equipment (i.e., similar to a node B in UTRAN or an eNB in ​​LTE) is named gNB when built on an NR radio and NG-eNB when built on an E-UTRAN radio. Summary of the Invention

[0003] Some example embodiments may relate to a method. This method may include receiving a first indication in downlink control information or a media access control element. The method may also include, at the user equipment, determining, based on the first indication, whether to apply a multi-transmitter-receiver point physical uplink shared channel scheme or a single-transmitter-receiver point physical uplink shared channel scheme for transmitting a transport block. Furthermore, the method may include interpreting at least one downlink control information field differently depending on whether a single-transmitter-receiver point physical uplink shared channel scheme or a multi-transmitter-receiver point physical uplink shared channel scheme is applicable.

[0004] Other example embodiments may relate to an apparatus. The apparatus may include at least one processor and at least one memory including computer program code. The at least one memory and the computer program code may also be configured, together with the at least one processor, to cause the apparatus to receive a first instruction at least in downlink control information or media access control elements. The apparatus may also be configured to determine, based on the first instruction, whether to apply a multi-transmitter-receiver point physical uplink shared channel scheme or a single-transmitter-receiver point physical uplink shared channel scheme for transmitting transport blocks. Furthermore, the apparatus may be configured to interpret at least one downlink control information field differently depending on whether a single-transmitter-receiver point physical uplink shared channel scheme or a multi-transmitter-receiver point physical uplink shared channel scheme is applicable.

[0005] Other example embodiments may relate to an apparatus. The apparatus may include components for receiving a first indication in downlink control information or media access control elements. The apparatus may also include components for determining, based on the first indication, whether to apply a multi-transmitter-receiver point physical uplink shared channel scheme or a single-transmitter-receiver point physical uplink shared channel scheme for transmitting a transport block. Furthermore, the apparatus may include components for interpreting at least one downlink control information field differently depending on whether a single-transmitter-receiver point physical uplink shared channel scheme or a multi-transmitter-receiver point physical uplink shared channel scheme is applicable.

[0006] According to other example embodiments, a non-transient computer-readable medium can be encoded with instructions that, when executed in hardware, can perform a method. The method may include receiving a first indication in downlink control information or a media access control element. The method may also include determining, based on the first indication, whether to apply a multi-transmitter-receiver point physical uplink shared channel scheme or a single-transmitter-receiver point physical uplink shared channel scheme for transmitting a transport block. Furthermore, the method may include interpreting at least one downlink control information field differently depending on whether a single-transmitter-receiver point physical uplink shared channel scheme or a multi-transmitter-receiver point physical uplink shared channel scheme is applicable.

[0007] Other example embodiments may relate to a computer program product that performs a method. The method may include receiving a first instruction in downlink control information or a media access control element. The method may also include, at the user equipment, determining, based on the first instruction, whether to apply a multiple transmit-receive-point physical uplink shared channel scheme or a single transmit-receive-point physical uplink shared channel scheme for transmitting a transport block. Furthermore, the method may include interpreting at least one downlink control information field differently depending on whether a single transmit-receive-point physical uplink shared channel scheme or a multiple transmit-receive-point physical uplink shared channel scheme is applicable.

[0008] Other example embodiments may relate to an apparatus that may include circuitry configured to receive a first indication in downlink control information or media access control elements. The apparatus may also include circuitry configured to determine, based on the first indication, whether to apply a multi-transmitter-receiver point physical uplink shared channel scheme or a single-transmitter-receiver point physical uplink shared channel scheme for transmitting a transport block. Furthermore, the apparatus may include circuitry configured to interpret at least one downlink control information field differently depending on whether a single-transmitter-receiver point physical uplink shared channel scheme or a multi-transmitter-receiver point physical uplink shared channel scheme is applicable. Attached Figure Description

[0009] To correctly understand the exemplary embodiments, reference should be made to the accompanying drawings, in which:

[0010] Figure 1 An example of a user equipment (UE) flowchart according to certain example embodiments is shown.

[0011] Figure 2 An example of another UE flowchart based on certain example embodiments is shown.

[0012] Figure 3 A flowchart of a method according to some example embodiments is shown.

[0013] Figure 4(a) illustrates an apparatus according to some example embodiments.

[0014] Figure 4(b) illustrates another apparatus according to some example embodiments. Detailed Implementation

[0015] It will be readily understood that components of certain example embodiments, as generally described and illustrated in the accompanying drawings, can be arranged and designed in a variety of different configurations. The following are detailed descriptions of some example embodiments of systems, methods, apparatuses, and computer program products that enable dynamic switching between multiple transmit receiver points (multiple TRPs) and a single transmit receiver point (single TRP).

[0016] Features, structures, or characteristics of the exemplary embodiments described throughout this specification may be combined in any suitable manner in one or more exemplary embodiments. For example, the use of phrases such as "certain embodiments," "exemplary embodiments," "some embodiments," or other similar language throughout this specification means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment. Therefore, the appearance of phrases such as "in some embodiments," "exemplary embodiments," "in some embodiments," "in other embodiments," or other similar language throughout this specification does not necessarily refer to the same set of embodiments, and the described features, structures, or characteristics may be combined in any suitable manner in one or more exemplary embodiments.

[0017] In Physical Uplink Shared Channel (PUSCH) multi-antenna precoding mode, User Equipment (UE) can be configured in two different modes. For example, the UE can be configured to perform codebook-based transmission or non-codebook-based transmission. For codebook-based Dynamic Grant (DG) PUSCH, the UE can determine the Sounding Reference Signal (SRS) Resource Indicator (SRI) and Transmit Precoding Matrix Indicator (TPMI) information (via precoding information and layer number) from the corresponding fields in the Downlink Control Information (DCI). The SRI provides uplink (UL) beam information, and the TPMI provides UL precoder information.

[0018] For non-codebook-based DG PUSCHs, the UE can determine its precoder and transport rank based on DL measurements. However, the UE's selection of the precoder (and layer number) for each scheduled PUSCH can be modified by the network (in the case of multiple SRS resources configured) by omitting a series of precoders from those already selected by the UE. This latter step can be performed by indicating a subset of the configured SRS resources via the SRI contained in the DCI of the scheduled PUSCH.

[0019] Under PUSCH power control, the UE can determine the PUSCH transmission power based on the process described in 3GPP TS 38.213. For example, the UE can indicate / determine closed-loop parameters (e.g., closed-loop index, transmit power control (TPC) command) and open-loop parameters (e.g., path loss reference RS, p0, alpha). Furthermore, (multiple) TPC commands can be carried within the UL authorization for scheduling PUSCH. Additionally, the TPC command and the corresponding closed-loop index can be jointly carried to multiple UEs via a group common DCI.

[0020] 3GPP can support PUSCH repetition type A, where PUSCH repetition via slot aggregation can be supported in a semi-static manner, meaning there is no repetition within a slot, and the aggregation factor is 2, 4, or 8. This repetition operation can also be called slot-based repetition.

[0021] 3GPP can also support PUSCH repetition type B, where the motivation for the PUSCH enhancement is to allow an allocation to be scheduled across slot boundaries and across DL symbols to reduce latency without sacrificing reliability (this is also known as multi-segment transmission). Furthermore, specifications can be provided for PUSCH enhancements for both dynamically licensed and configured licensed PUSCH. For example, for a transport block, a dynamic UL license or a configured license can schedule two or more PUSCH repetitions, which can be in a single slot or across slot boundaries in consecutive available slots.

[0022] In some cases, a nominal repeat can be split into one or more actual repeats around semi-static DL symbols, around invalid UL symbols with dynamic indication / semi-static configuration, and / or at slot boundaries. For example, for dynamic granting, actual repeats can be sent. Furthermore, there may be no conflict between the transmitted symbols and the dynamic DL / flexible symbols indicated by the Dynamic Slot Format Indicator (SFI). Moreover, for the configured granting, whether actual repeats are sent may follow the Rel-15 principle. For example, if an actual repeat conflicts with any dynamic downlink (DL) / flexible symbol, it is not sent. Additionally, if a dynamic SFI is configured but not received, the actual repeat is not sent if it conflicts with any semi-static flexible symbol.

[0023] Certain PUSCH enhancements may be available for multi-TRP. Various protocols have been established in 3GPP Release 17 supporting multi-TRP PUSCH transmission / repetition schemes. For example, for M-TRP PUSCH reliability enhancements based on a single DCI, support can be provided for multiple TDM (Time Division Multiplexing) PUSCH repetition schemes based on PUSCH Type A and Type B. In some multi-TRP PUSCH schemes, the same TB (Transport Block) can be transmitted / repetitive in a time-division multiplexing (TDM) manner, essentially towards different Transport Receiver Points (TRPs), using two different uplink beams (or equivalently, spatial relationship information, uplink Transport Configuration Indicator (TCI) status, or SRI). Furthermore, for M-TRP PUSCH repetition schemes based on a single DCI, support for codebook-based PUSCH transmission can be enhanced. For example, support for indications of two SRIs (each SRI can correspond to an uplink beam) and indications of two TPMIs can exist. When supporting two SRIs, the bit fields of the SRI can be enhanced, and the SRI fields can remain unchanged. When supporting two TPMIs, if two TPMIs are indicated, the same number of layers can be applied to both TPMIs. Furthermore, the number of SRS ports between the two TRPs can be the same, and details used to indicate the two TPMIs (e.g., one TPMI field or two TPMI fields) can be provided. In some cases, the maximum number of SRS resource sets can be increased to two, and configuration details for each SRS resource set (e.g., the number of SRS resources in the resource set) can be provided. Note that if the multi-TRP PUSCH scheme is not configured (not configured to be applicable in some cases), the single-TRP PUSCH scheme (where PUSCH repetitions are sent towards the same TRP using the same uplink beam) is the default scheme.

[0024] With enhanced power control associated with multiple TRP PUSCHs, certain alternatives may be available for closed-loop power control of each TRP used for a PUSCH when the "closedLoopIndex" value differs. For example, in the first option, a single TPC field can be used in DCI format 0_1 / 0_2, and the TPC value is applied to both PUSCH beams. In the second option, a single TPC field can be used in DCI format 0_1 / 0_2, and the TPC value is applied to one of the two PUSCH beams at the time slot. In the third option, a second TPC field can be added to DCI format 0_1 / 0_2. In the fourth option, a single TPC field can be used in DCI format 0_1 / 0_2, and this field can indicate two TPC values ​​applied separately to the two PUSCH beams.

[0025] As noted in this paper, certain multi-TRP PUSCH transmission / repetition schemes have been defined. However, there may be some challenges associated with supporting single / multi-TRP handover. For example, for critical services such as Ultra-Reliable Low-Latency Communication (URLLC), it may be beneficial to use a multi-TRP PUSCH scheme to guarantee reliability / robustness by relying on beam diversity. For instance, it may be possible to repeat the same transport block (TB) toward multiple TRPs, allowing the network to overcome congestion scenarios. However, in certain situations and / or for less critical services, the network may wish to receive several TBs toward the same TRP. To allow for such flexibility, it may be necessary to support dynamic handover between different repetition modes (or transmission modes).

[0026] Once the operating mode (e.g., multiple TRPs vs. single TRP) is determined, how to determine a particular parameter(s) value is also open. The indication / interpretation of that parameter(s) value can differ depending on whether a single TRP PUSCH scheme or a multiple TRP PUSCH scheme is used. Furthermore, a mapping / association should be defined between the parameter(s) value indicated via DCI and the configured SRS resource set (and therefore TRP) and / or even PUSCH repetition. Currently, there is no solution that enables the UE to determine whether to apply a multiple TRP PUSCH scheme or a single TRP PUSCH scheme. Nor is there a solution that enables the UE to determine / interpret (multiple) corresponding parameter(s) for at least one DCI field, depending on the applicable PUSCH scheme, and that enables the UE to determine the association between the parameter(s) value indicated via DCI and the configured SRS resource set and / or PUSCH repetition.

[0027] In view of the above challenges, some example embodiments can provide the capability that enables the UE to determine whether to apply a multi-TRP PUSCH scheme or a single-TRP PUSCH scheme. Some example embodiments can also provide a way to determine / interpret (multiple) corresponding parameter values ​​for at least one (corresponding) DCI field, depending on the applicable PUSCH scheme. Additional example embodiments can enable the UE to determine the association between one (or more) parameter values ​​indicated via the DCI and the configured SRS resource set and / or PUSCH repetition.

[0028] According to some example embodiments, multiple alternative schemes may be available for the UE to determine whether to apply a multi-TRP PUSCH scheme or a single-TRP PUSCH scheme. Some example embodiments may also provide the UE with a way to determine the association or mapping between one or more parameter values ​​indicated via DCI and the configured SRS resource set (and therefore TRP) and / or PUSCH repetition, depending on the applicable PUSCH scheme. Other example embodiments may provide the UE with one or more ways to determine (or more) corresponding parameter values ​​for at least one DCI field differently, depending on the applicable PUSCH scheme.

[0029] According to some example embodiments, the UE can determine the operating mode from a multi-TRP PUSCH scheme or a single-TRP PUSCH scheme based on several factors. For example, the UE can make the above determination based on the Time Domain Resource Allocation (TDRA) entry associated with the single-TRP PUSCH scheme or the multi-TRP PUSCH scheme (via Radio Resource Control (RRC) or Media Access Control (MAC) control element (CE)). Therefore, when the TDRA entry is indicated in the DCI, the UE can know which scheme to apply. In some example embodiments, if the TDRA entry is not associated with a scheme (e.g., single-TRP or multi-TRP), a default scheme can be defined / considered. For example, a single-TRP PUSCH scheme can be used as the default scheme to be used.

[0030] In other example embodiments, where a separate SRI subfield / field is used for SRI indication per TRP, and assuming there is at least one SRI entry configured to be reserved (or invalid): if at least one SRI subfield / field indicates a reserved entry, the UE can apply a single TRP PUSCH scheme; otherwise, if both subfields / fields indicate valid entries (i.e., not reserved), a multi-TRP PUSCH scheme can be applied. Note that, at least in some cases, the terms "subfield" and "field" can be used interchangeably. According to other example embodiments, alternatively or additionally, in the case of codebook-based UL mode, this operation can be used for the "Precoding Information and Layer Number" field, which includes TPMI.

[0031] In some example embodiments, when the SRI field is used for a joint SRI indication for two TRPs (e.g., indicating different combinations of SRS resources, such as including more than one SRS resource at a time), some of the SRI combinations / entries (i.e., indications) can be configured for a single TRP PUSCH scheme. For example, some of the SRI combinations / entries can be configured for a single TRP PUSCH scheme if the combination points to SRS resources(s) in one SRS resource set within an SRS resource set. Other SRI combinations can be configured for a multi-TRP PUSCH scheme, for example, if the combination points to SRS resources belonging to different SRS resource sets. Therefore, when an SRI indication is received, the UE can know whether to apply a single TRP scheme or a multi-TRP scheme. Alternatively or additionally, in other example embodiments, the above operations can be used for the "Precoding Information and Layer Number" field, which, when operating in codebook-based UL mode, can include TPMI.

[0032] According to certain example embodiments, the UE may be able to determine the operating mode from a multi-TRP PUSCH scheme or a single-TRP PUSCH scheme based on a dedicated field in the DCI. For example, the dedicated field in the DCI may be used to indicate whether a single-TRP scheme or a multi-TRP scheme should be applied. In some example embodiments, if two SRS resource sets are configured, and each set is associated with a TRP, the dedicated field may be interpreted as the number of SRS resource sets to be used (e.g., 1 or 2).

[0033] According to other example embodiments, the UE may be able to determine the operating mode from a multi-TRP PUSCH scheme or a single-TRP PUSCH scheme based on the new MAC CE indication. That is, the MAC CE indication can be used to indicate whether a single-TRP scheme or a multi-TRP scheme should be applied.

[0034] According to another example embodiment, by providing the UE with one or more dedicated radio network temporary identifiers (RNTIs), the UE can determine the operating mode from a multi-TRP PUSCH scheme or a single-TRP PUSCH scheme. For example, a dedicated RNTI can indicate whether a multi-TRP PUSCH scheme or a single-TRP PUSCH scheme should be applied. According to other example embodiments, in addition to the current RNTI(s) that can be used to indicate whether a single-TRP scheme should be applied, multiple dedicated RNTI(s) can also be used to indicate whether a multi-TRP scheme should be applied.

[0035] As discussed above, some example embodiments may provide a method / alternative for determining whether to apply a multiple TRPPUSCH scheme or a single TRP PUSCH scheme. Other example embodiments may provide an operation / method to determine / define a mapping / association between a parameter(s) indicated via DCI and a configured set of SRS resources or even a repeating of PUSCH, wherein it is assumed that each set of SRS resources is associated with a TRP.

[0036] For example, according to some example embodiments, the MAC CE (or DCI) indication can be used to indicate an SRS resource set index / ID (e.g., 0 or 1). This indication can be used to indicate which SRS resource set the UE can use when a single TRP PUSCH scheme is applied. In other example embodiments, this indication can be used to indicate which SRS resource set to start with when a multi-TRP PUSCH scheme is applied (i.e., it can indicate the order of the SRS resource sets). Specifically, the indicated SRS resource set index can allow the UE to determine whether a first value of a certain DCI field (such as TPC command, SRI, "precoding information and layer number", and PTRS-DMRS association) corresponds to a first SRS resource set or a second SRS resource set. Furthermore, for multi-TRP PUSCH schemes, for some of the indicated values ​​that are mapped repeatedly to PUSCH, this indication can be used to indicate whether to start with a value corresponding to either the first or second SRS resource set (and therefore potentially the first or second TRP).

[0037] According to certain example embodiments, for the methods / alternatives described above used to determine whether to apply a multi-TRP PUSCH scheme or a single-TRP PUSCH scheme, the UE can interpret at least one DCI field of the same size (if the field is indicating applicable values), regardless of which scheme is applicable. This can be achieved in various ways; for example, in some example embodiments, in the case of a single-TRP PUSCH scheme, the UE can consider a portion / subfield of the field and determine the parameter value based on that portion / subfield. In the case of a multi-TRP PUSCH scheme, the UE can also consider the entire field (i.e., both subfields) and determine two parameter values ​​based on that field. For example, the above can be applied when the TPC field includes two TPC subfields, each of the two TPC subfields may contain a TPC command value. Similar methods can also be applied to the SRI field, the "Precoding Information and Layer Number" field (including TPMI), and / or the PTRS-DMRS association field. In some example embodiments, the SRI value may point to more than one SRS resource (e.g., in the case of a non-codebook-based mode).

[0038] According to other example embodiments, if at least one field is used as a codepoint pointing to two parameter values ​​indicated via MAC CE (or RRC), the UE can interpret at least one DCI field of the same size as follows, regardless of the applicable scheme: In the case of a single TRP scheme, the UE can determine one parameter value (first or second) from the two values ​​indicated via MAC CE (or RRC); and in the case of a multi-TRP PUSCH scheme, the UE can determine / use both values. For example, the above can be applied when the TPC field in the DCI is used as a codepoint, for example, associated with two TPC command values ​​via MAC CE. Furthermore, similar methods can be applied to the SRI field, the "Precoding Information and Layer Number" field, and / or the PTRS-DMRS associated field.

[0039] Figure 1 An example of a UE flowchart according to certain example embodiments is shown. For example... Figure 1As shown, at 100, the UE can receive configuration information indicating that a multi-TRP PUSCH scheme is applicable. For example, in some example embodiments, this configuration information, indication, and DCI for scheduling PUSCH can be received from the network (e.g., gNB). At 105, the UE can receive an indication of the SRS resource set index (via MAC CE or DCI). At 110, the UE can receive a DCI for scheduling (multiple) PUSCHs. At 115, the UE can determine whether to apply the multi-TRP PUSCH scheme or the single-TRP PUSCH scheme based on the TDRA indication in the DCI (i.e., based on whether the TDRA entry is associated with a multi-TRP PUSCH scheme or a single-TRP PUSCH scheme). At 120, the UE checks whether to apply the multi-TRP PUSCH scheme based on the determination at 115. If the multi-TRP PUSCH scheme will not be applied (i.e., then the single-TRP PUSCH scheme should be applied), then at 125, the UE can determine which SRS resource set to use based on the received indication. At 130, the UE can interpret at least one DCI field by considering a portion / subfield of the field in the case of a single TRP PUSCH scheme and determining the parameter value based on that portion / subfield. However, if it is determined at 120 that a multi-TRP PUSCH scheme should be applied, then at 135, the UE can determine at least one of the following based on the received indication. For example, the UE can determine which SRS resource set corresponds to which value between two values ​​indicated in the DCI field(s). In order to map some of the indicated values ​​to PUSCH repetition, the UE can also determine whether to start with a value corresponding to the first SRS resource set or the second SRS resource set (and therefore the first TRP or the second TRP). At 140, the UE can interpret at least one DCI field by considering the entire field (i.e., two subfields) in the case of a multi-TRP PUSCH scheme and determining two parameter values ​​based on that field.

[0040] Figure 2 An example of another UE flowchart according to certain example embodiments is shown. In particular, Figure 2A UE flowchart is shown for the following scenario: a separate SRI field (or subfield) can be used for the SRI indication per TRP. For example, at 200, the UE may receive configuration information indicating that a multi-TRP PUSCH scheme is applicable. At 205, the UE may receive an indication of the SRS resource set index (via MAC CE or DCI). At 210, the UE may receive a DCI indicating the scheduling of (multiple) PUSCHs. At 215, the UE may determine whether to apply a multi-TRP PUSCH scheme or a single-TRP PUSCH scheme based on the SRI indication in the DCI. In some example embodiments, if one SRI(sub) field indicates a reserved entry, a single-TRP PUSCH scheme can be applied. However, if both SRI(sub) fields indicate valid entries, a multi-TRP PUSCH scheme can be applied.

[0041] At 220, the UE checks whether a multi-TRP PUSCH scheme should be applied based on the determination at 215. If the multi-TRP PUSCH scheme will not be applied (i.e., a single-TRP PUSCH scheme should be applied), then at 225, the UE can determine which SRS resource set to use based on the received indication. At 230, the UE can interpret at least one DCI field by considering a portion / subfield of the field in the case of a single-TRP PUSCH scheme and determining the parameter value based on that portion / subfield. However, if it is determined at 220 that a multi-TRP PUSCH scheme should be applied, then at 235, the UE can determine at least one of the following based on the received indication. For example, the UE can determine which SRS resource set corresponds to which value between two values ​​indicated in the DCI field(s). In order to map some of the indicated values ​​to PUSCH repetition, the UE can also determine whether to start with a value corresponding to the first SRS resource set or the second SRS resource set (and therefore the first TRP or the second TRP). In 240, the UE can interpret at least one DCI field by considering the entire field (i.e., two subfields) in the case of a multi-TRP PUSCH scheme and determining two parameter values ​​based on that field.

[0042] Figure 3 A flowchart of a method according to certain example embodiments is shown. In some example embodiments, Figure 3 The flowchart can be executed by network entities or network nodes in 3GPP systems such as LTE or 5G-NR. For example, in the example embodiment, Figure 3 The method can be performed by the UE, such as by device 10 or 20 similar to those shown in Figures 4(a) and 4(b).

[0043] According to certain example embodiments, Figure 3The method may include, at 300, receiving a first indication in downlink control information or a media access control element. The method may further include, at 305, at the user equipment, determining whether to apply a multi-transmitter-receiver point physical uplink shared channel scheme or a single-transmitter-receiver point physical uplink shared channel scheme for transmitting a transport block. Furthermore, the method may include, at 310, interpreting at least one downlink control information field differently depending on whether a single-transmitter-receiver point physical uplink shared channel scheme or a multi-transmitter-receiver point physical uplink shared channel scheme is applicable.

[0044] According to some example embodiments, the method may further include: receiving a second indication indicating a probe reference signal resource set index. According to other example embodiments, the second indication indicating the probe reference signal resource set index may be received via a media access control element or downlink control information. According to yet another example embodiment, when a single transmit receiver physical uplink shared channel scheme is applicable, the method may further include: determining which probe reference signal resource set to use based on the received second indication indicating the probe reference signal resource set index.

[0045] In some example embodiments, when a single transmit receiver point physical uplink shared channel scheme is applicable, at least one downlink control information field can be interpreted by considering subfields of the downlink control information field and determining parameter values ​​based on the subfields of the downlink control information field. In some example embodiments, when a multi-transmitter receiver point physical uplink shared channel scheme is applicable, the method may further include determining, based on a received second indication indicating a probe reference signal resource set index, at least one of the following: which probe reference signal resource set corresponds to which of the two values ​​indicated in the downlink control information field; and whether, in order to map the indicated value to physical uplink shared channel repetition, it should begin with a value corresponding to either a first probe reference signal resource set or a second probe reference signal resource set.

[0046] In other example embodiments, when a multi-transmitter receiver physical uplink shared channel scheme is applicable, at least one downlink control information field can be interpreted by at least one of the following: considering the entire downlink control information field and determining two parameter values ​​based on the entire downlink control information field. According to some example embodiments, the first indication in the downlink control information may be a time-domain resource allocation. According to other example embodiments, the time-domain resource allocation may be associated with a single-transmitter receiver physical uplink shared channel scheme or a multi-transmitter receiver physical uplink shared channel scheme. According to yet another example embodiment, the first indication in the downlink control information may be a sounding reference signal resource indicator.

[0047] In some example embodiments, a single transmit receiver physical uplink shared channel scheme can be applied when at least one field of the probe reference signal resource indicator indicates a reserved entry. In some example embodiments, a multi-transmitter receiver physical uplink shared channel scheme can be applied when each of two fields of the probe reference signal resource indicator indicates a valid entry. In other example embodiments, the method may further include receiving downlink control information for scheduling the physical uplink shared channel.

[0048] Figure 4(a) illustrates apparatus 10 according to some example embodiments. In some example embodiments, apparatus 10 may be a node or element in or associated with a communication network, such as a UE, mobile device (ME), mobile station, mobile device, fixed device, IoT device, or other device. In other example embodiments, apparatus 10 may be a network element, node, host, or server in or serving such a communication network. It should be noted that those skilled in the art will understand that apparatus 10 may include components or features not shown in Figure 4(a).

[0049] In some example embodiments, device 10 may include one or more processors, one or more computer-readable storage media (e.g., memory, storage device, etc.), one or more radio access components (e.g., modems, transceivers, etc.), and / or a user interface. In some example embodiments, device 10 may be configured to operate using one or more radio access technologies, such as GSM, LTE, LTE-A, NR, 5G, WLAN, WiFi, NB-IoT, Bluetooth, NFC, MulteFire, and / or any other radio access technology. It should be noted that those skilled in the art will understand that device 10 may include components or features not shown in FIG. 4(a).

[0050] As illustrated in the example of Figure 4(a), device 10 may include or be coupled to a processor 12 for processing information and executing instructions or operations. Processor 12 may be any type of general-purpose or special-purpose processor. In fact, for example, processor 12 may include one or more of a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), and a processor based on a multi-core processor architecture. Although a single processor 12 is shown in Figure 4(a), multiple processors may be used according to other example embodiments. For example, it should be understood that in some example embodiments, device 10 may include two or more processors that can form a multiprocessor system capable of supporting multiple processing (e.g., in this case, processor 12 may represent multiple processors). According to some example embodiments, the multiprocessor system may be tightly coupled or loosely coupled (e.g., to form a computer cluster).

[0051] Processor 12 can perform functions associated with the operation of device 10, including, for example, precoding of antenna gain / phase parameters, encoding and decoding of individual bits forming communication messages, formatting of information, and overall control of device 10, including... Figures 1 to 3 The process is shown.

[0052] Device 10 may also include or be coupled to memory 14 (internal or external), which may be coupled to processor 12, for storing information and instructions executable by processor 12. Memory 14 may be one or more memories and may be of any type suitable for the local application environment, and may be implemented using any suitable volatile or non-volatile data storage technology, such as semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory, and / or removable memory. For example, memory 14 may include random access memory (RAM), read-only memory (ROM), static storage devices such as disks or optical discs, hard disk drives (HDDs), or any combination of any other type of non-transient machine or computer-readable medium. Instructions stored in memory 14 may include program instructions or computer program code that, when executed by processor 12, enable device 10 to perform the tasks described herein.

[0053] In some example embodiments, device 10 may also include or be coupled to an (internal or external) drive or port configured to accept and read external computer-readable storage media, such as an optical disc, USB drive, flash drive, or any other storage media. For example, the external computer-readable storage media may store data for execution by processor 12 and / or device 10 to perform... Figures 1 to 3Computer programs or software using any of the methods shown.

[0054] In some example embodiments, device 10 may further include or be coupled to one or more antennas 15 for receiving downlink signals and for transmitting from device 10 via an uplink. Device 10 may also include a transceiver 18 configured to transmit and receive information. Transceiver 18 may also include a radio interface (e.g., a modem) coupled to antenna 15. The radio interface may correspond to a variety of radio access technologies, including one or more of GSM, LTE, LTE-A, 5G, NR, WLAN, NB-IoT, Bluetooth, BT-LE, NFC, RFID, UWB, etc. The radio interface may include other components such as filters, converters (e.g., digital-to-analog converters), symbol demappers, signal shaping components, inverse fast Fourier transform (IFFT) modules, etc., for processing symbols carried by the downlink or uplink, such as OFDMA symbols.

[0055] For example, transceiver 18 may be configured to modulate information onto a carrier waveform for transmission by antenna(s)15, and demodulate information received via antenna(s)15 for further processing by other elements of device 10. In other example embodiments, transceiver 18 may be able to directly transmit and receive signals or data. Additionally or alternatively, in some example embodiments, device 10 may include input and / or output devices (I / O devices). In some example embodiments, device 10 may also include a user interface, such as a graphical user interface or a touchscreen.

[0056] In some example embodiments, memory 14 stores software modules that provide functionality when executed by processor 12. These modules may include, for example, an operating system that provides operating system functionality to device 10. The memory may also store one or more functional modules, such as applications or programs, to provide additional functionality to device 10. Components of device 10 may be implemented in hardware or as any suitable combination of hardware and software. According to some example embodiments, device 10 may optionally be configured to communicate with device 20 via wireless or wired communication link 70 according to any radio access technology, such as NR.

[0057] According to some example embodiments, the processor 12 and memory 14 may be included in a processing circuit system or a control circuit system, or may form part of a processing circuit system or a controller circuit system. Furthermore, in some example embodiments, the transceiver 18 may be included in a transceiver circuit system, or may form part of a transceiver circuit system.

[0058] As described above, according to certain example embodiments, device 10 may be a UE. According to certain example embodiments, device 10 may be controlled by memory 14 and processor 12 to perform functions associated with the example embodiments described herein. For example, in some example embodiments, device 10 may be controlled by memory 14 and processor 12 to receive a first instruction in downlink control information or media access control elements. Device 10 may also be controlled by memory 14 and processor 12 to determine, based on the first instruction, whether to apply a multi-transmitter-receiver point physical uplink shared channel scheme or a single-transmitter-receiver point physical uplink shared channel scheme for transmitting transport blocks. Furthermore, device 10 may be controlled by memory 14 and processor 12 to interpret at least one downlink control information field differently depending on whether a single-transmitter-receiver point physical uplink shared channel scheme or a multi-transmitter-receiver point physical uplink shared channel scheme is determined to be applicable.

[0059] Figure 4(b) illustrates apparatus 20 according to some example embodiments. In some example embodiments, apparatus 20 may be a node or element in or associated with a communication network, such as a base station, Node B, evolved Node B (eNB), 5G Node B or access point, next-generation Node B (NG-NB or gNB), and / or WLAN access point, which is associated with a radio access network (RAN) such as an LTE network, 5G, or NR. It should be noted that those skilled in the art will understand that apparatus 20 may include components or features not shown in Figure 4(b).

[0060] As illustrated in the example of Figure 4(b), device 20 may include a processor 22 for processing information and executing instructions or operations. Processor 22 may be any type of general-purpose or special-purpose processor. For example, by way of example, processor 22 may include one or more of a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), and a processor based on a multi-core processor architecture. Although a single processor 22 is shown in Figure 4(b), multiple processors may be used according to other example embodiments. For example, it should be understood that in some example embodiments, device 20 may include two or more processors that can form a multiprocessor system capable of supporting multiple processing (e.g., in this case, processor 22 may represent multiple processors). In some example embodiments, the multiprocessor system may be tightly coupled or loosely coupled (e.g., to form a computer cluster).

[0061] According to certain example embodiments, processor 22 may perform functions associated with the operation of device 20, which may include, for example, precoding of antenna gain / phase parameters, encoding and decoding of individual bits forming communication messages, formatting of information, and overall control of device 20.

[0062] Device 20 may also include or be coupled to memory 24 (internal or external), which may be coupled to processor 22 for storing information and instructions executable by processor 22. Memory 24 may be one or more memories of any type suitable for the local application environment and may be implemented using any suitable volatile or non-volatile data storage technology, such as semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and / or removable memory. For example, memory 24 may include random access memory (RAM), read-only memory (ROM), static storage devices such as disks or optical discs, hard disk drives (HDDs), or any combination of any other type of non-transient machine or computer-readable medium. Instructions stored in memory 24 may include program instructions or computer program code that, when executed by processor 22, enable device 20 to perform the tasks described herein.

[0063] In some example embodiments, device 20 may also include or be coupled to an (internal or external) drive or port configured to accept and read external computer-readable storage media, such as an optical disc, USB drive, flash drive, or any other storage media. For example, the external computer-readable storage media may store information for processor 22 and / or device 20 to execute the methods described herein.

[0064] In some example embodiments, device 20 may further include or be coupled to one or more antennas 25 for transmitting and / or receiving signals and / or data to and from device 20. Device 20 may also include or be coupled to a transceiver 28 configured to transmit and receive information. Transceiver 28 may include, for example, multiple radio interfaces that may be coupled to, for example, the antennas(s) 25. The radio interfaces may correspond to a variety of radio access technologies, including one or more of GSM, NB-IoT, LTE, 5G, WLAN, Bluetooth, BT-LE, NFC, RFID, UWB, MulteFire, etc. The radio interfaces may include components such as filters, converters (e.g., digital-to-analog converters), mappers, Fast Fourier Transform (FFT) modules, etc., to generate symbols for transmission via one or more downlinks and to receive symbols (e.g., via an uplink).

[0065] Therefore, transceiver 28 can be configured to modulate information onto a carrier waveform for transmission by antenna(s)25, and demodulate information received via antenna(s)25 for further processing by other elements of device 20. In other example embodiments, transceiver 18 may be able to directly transmit and receive signals or data. Additionally or alternatively, in some example embodiments, device 20 may include input and / or output devices (I / O devices).

[0066] In some example embodiments, memory 24 may store software modules that provide functionality when executed by processor 22. These modules may include, for example, an operating system that provides operating system functionality to device 20. The memory may also store one or more functional modules, such as applications or programs, to provide additional functionality to device 20. Components of device 20 may be implemented in hardware or as any suitable combination of hardware and software.

[0067] According to some example embodiments, the processor 22 and the memory 24 may be included in a processing circuit system or a control circuit system, or may be part of a processing circuit system or a controller circuit system. Furthermore, in some example embodiments, the transceiver 28 may be included in a transceiver circuit system, or may be part of a transceiver circuit system.

[0068] As used herein, the term "circuit system" can refer to a hardware circuit implementation only (e.g., analog and / or digital circuit systems), a combination of hardware circuits and software, a combination of analog and / or digital hardware circuits with software / firmware, any part of a hardware processor(s) (including digital signal processors) having software working together to enable a device (e.g., devices 10 and 20) to perform various functions, and / or a hardware circuit and / or processor(s) or a portion thereof that operates using software but may be absent when operation is not required. As another example, as used herein, the term "circuit system" can also encompass a hardware circuit or processor (or multiple processors) only, or a portion of a hardware circuit or processor, and its accompanying software and / or firmware implementation. The term "circuit system" can also encompass baseband integrated circuits, for example, in servers, cellular network nodes or devices, or other computing or networking devices.

[0069] As described above, in some embodiments, device 20 may be a network element, node, host, or server in or serving a communications network. For example, device 20 may be a satellite, base station, node B, evolved Node B (eNB), 5G node B or access point, next-generation node B (NG-NB or gNB), and / or WLAN access point associated with a radio access network (RAN) such as an LTE network, 5G, or NR. According to some embodiments, device 20 may be controlled by memory 24 and processor 22 to perform functions associated with any of the embodiments described herein.

[0070] Other example embodiments may provide components for performing any of the functions, steps, or processes described herein. For example, one example embodiment may point to an apparatus including components for receiving a first indication in downlink control information or media access control elements. The apparatus may further include components for determining, based on the first indication, whether to apply a multi-transmitter-receiver physical uplink shared channel scheme or a single-transmitter-receiver physical uplink shared channel scheme for transmitting a transport block. Furthermore, the apparatus may include components for interpreting at least one downlink control information field differently depending on whether a single-transmitter-receiver physical uplink shared channel scheme or a multi-transmitter-receiver physical uplink shared channel scheme is determined to be applicable.

[0071] Certain example embodiments described herein provide several technical improvements, enhancements, and / or advantages. In some example embodiments, it may be possible to provide solutions that enable the UE to dynamically determine whether to apply a multi-TRP PUSCH scheme or a single-TRP PUSCH scheme. It may also be possible for the UE to determine, for at least one DCI field, corresponding parameter(s) values ​​depending on the applicable PUSCH scheme. Furthermore, it may be possible to provide an operation to determine (i) a parameter(s) value(s) indicated via DCI and (ii) a configured set of SRS resources (and therefore TRPs) and / or PUSCH repetitions. Such solutions and operations may be useful for UEs with different types of services (e.g., URLLC and eMBB), and more generally, when both multi-TRP PUSCH schemes and single-TRP PUSCH schemes will be required for the UE.

[0072] A computer program product may include one or more computer-executable components that, when the program runs, are configured to perform some example embodiments. The one or more computer-executable components may be at least one piece of software code or a portion thereof. Modifications and configurations required to implement the functionality of certain example embodiments may be executed as routines(s), which may be implemented as added or updated software routines(s). These software routines(s) may be downloaded to the device.

[0073] For example, software or computer program code, or portions thereof, may be in the form of source code, object code, or some intermediate form, and may be stored on some carrier, distribution medium, or computer-readable medium, which may be any entity or device capable of carrying the program. Such a carrier may include recording media, computer memory, read-only memory, optoelectronic and / or electrical carrier signals, telecommunication signals, and software distribution packages. Depending on the required processing power, the computer program may execute in a single electronic digital computer or be distributed across multiple computers. The computer-readable medium or computer-readable storage medium may be a non-transient medium.

[0074] In other example embodiments, the function may be performed by hardware or circuitry included in the device (e.g., device 10 or device 20), for example, by using an application-specific integrated circuit (ASIC), a programmable gate array (PGA), a field-programmable gate array (FPGA), or any other combination of hardware and software. In yet another example embodiment, the function may be implemented as a signal, i.e., an intangible means that can be carried by an electromagnetic signal downloaded from the Internet or other networks.

[0075] According to certain example embodiments, devices such as nodes, equipment, or corresponding components may be configured as circuit systems, computers, or microprocessors, such as monolithic computer elements, or configured as chipsets, including at least a memory for providing storage capacity for arithmetic operations and an arithmetic processor for performing arithmetic operations.

[0076] It will be readily understood by those skilled in the art that the present invention described above can be practiced with a different sequence of processes and / or with hardware elements in a different configuration than those disclosed. Therefore, although the invention has been described based on these exemplary embodiments, it will be apparent to those skilled in the art that certain modifications, variations, and alternative constructions will be readily apparent while remaining within the spirit and scope of the exemplary embodiments. While the above embodiments relate to 5G NR and LTE technologies, they can also be applied to any other current or future 3GPP technologies, such as Advanced LTE and / or fourth-generation (4G) technologies.

[0077] Partial Glossary

[0078] 3GPP Third Generation Partnership Project

[0079] 5G (Fifth Generation)

[0080] 5GC 5G core

[0081] CG configuration license

[0082] DCI Downlink Control Information

[0083] DL downlink

[0084] DMRS demodulation reference signal

[0085] eNB Enhanced Node B

[0086] gNB 5G or next-generation NodeB

[0087] MAC CE Media Access Control Element

[0088] NR New Radio

[0089] PDCCH (Physical Downlink Control Channel)

[0090] PDSCH (Physical Downlink Shared Channel)

[0091] PL RS path loss reference signal

[0092] PRI PUCCH Resource Index

[0093] PUCCH (Physical Uplink Control Channel)

[0094] PUSCH Physical Uplink Shared Channel

[0095] PTRS phase tracking reference signal

[0096] RAN (Radio Access Network)

[0097] SRS Detection Reference Signal

[0098] SRI SRS resource indicator

[0099] TCI Transport Configuration Indicator

[0100] TDM (Time Division Multiplexing)

[0101] TDRA Time Domain Resource Allocation

[0102] TPMI Transport Precoder Matrix Indicator

[0103] TRP Transmit and Receive Points

[0104] UE User Equipment

[0105] UL uplink

Claims

1. A method to be performed at a user equipment, the method comprising: Receive the first instruction from the base station in the downlink control information; Based on the first instruction, determine whether to apply the multi-transmission receiver point physical uplink shared channel scheme or the single-transmission receiver point physical uplink shared channel scheme. Depending on whether the single transmit receiver point physical uplink shared channel scheme or the multi transmit receiver point physical uplink shared channel scheme is applicable, at least one field of the downlink control information may be interpreted differently. Receive a second instruction from the base station. When the single-transmitter-receiver-point physical uplink shared channel scheme is applicable, the second indication indicates the probe reference signal resource set index, and the method further includes determining which probe reference signal resource set to use based on the received second indication; and When the multi-transmission receiver point physical uplink shared channel scheme is applicable, the second indication indicates the order of the set of probe reference signal resources to be used, and the method further includes determining the order of the set of probe reference signal resources to be used based on the received second indication.

2. The method of claim 1, wherein the first indication and the second indication are received in the same field of the downlink control information.

3. The method according to claim 1 or 2, wherein when the single transmit receiver point physical uplink shared channel scheme is applicable, the at least one field of the downlink control information is interpreted by at least one of the following: Considering the subfields of at least one field of the downlink control information, and The parameter value is determined based on the sub-field.

4. The method according to claim 3, wherein When the at least one field of the downlink control information includes a first probe reference signal resource indicator field and a second probe reference signal resource indicator field, the subfield is either the first probe reference signal resource indicator field or the second probe reference signal resource indicator field; When the at least one field of the downlink control information includes a first precoding information and a layer digital segment and a second precoding information and a layer digital segment, the subfield is either the first precoding information and a layer digital segment or the second precoding information and a layer digital segment; When the at least one field of the downlink control information includes a first transmit power control command field and a second transmit power control command field, the subfield is either the first transmit power control command field or the second transmit power control command field. When the at least one field of the downlink control information includes a first phase tracking reference signal-demodulation reference signal association field and a second phase tracking reference signal-demodulation reference signal association field, the subfield is either the first phase tracking reference signal-demodulation reference signal association field or the second phase tracking reference signal-demodulation reference signal association field. When the at least one field of the downlink control information includes a single phase tracking reference signal-demodulation reference signal association field, the subfield is part of the phase tracking reference signal-demodulation reference signal association field.

5. The method according to any one of claims 1-2 and 4, wherein the at least one field of the downlink control information comprises at least one of the following: a first probe reference signal resource indicator field, a second probe reference signal resource indicator field, a first precoding information and layer digital segment, a second precoding information and layer digital segment, a first transmit power control command field, a second transmit power control command field, a first phase tracking reference signal-demodulation reference signal association field, and a second phase tracking reference signal-demodulation reference signal association field.

6. The method according to claim 1 or 2, wherein when the multi-transmission receiver physical uplink shared channel scheme is applicable, the at least one downlink control information field is interpreted by at least one of the following: Considering the entire at least one downlink control information field, and The two parameter values ​​are determined based on the entire at least one downlink control information field.

7. The method according to any one of claims 1-2 and 4, wherein when the multi-transmission receiver physical uplink shared channel scheme is applicable, the method comprises: The order of the detection reference signal resource sets to be used is determined by starting with a value corresponding to either the first detection reference signal resource set or the second detection reference signal resource set.

8. An apparatus configured to be operable at a user equipment, the apparatus comprising: A component used to receive a first indication from a base station in downlink control information; Components for determining, based on the first indication, whether to apply a multi-transmitter receiver physical uplink shared channel scheme or a single-transmitter receiver physical uplink shared channel scheme; as well as A component for interpreting at least one field of the downlink control information differently depending on whether the single transmit receiver point physical uplink shared channel scheme or the multi transmit receiver point physical uplink shared channel scheme is applicable; A component for receiving a second instruction from the base station. When the single-transmitter-receiver-point physical uplink shared channel scheme is applicable, the second indication indicates the probe reference signal resource set index, and the apparatus further includes components for determining which probe reference signal resource set to use based on the received second indication; and When the multi-transmission receiver physical uplink shared channel scheme is applicable, the second indication indicates the order of the set of probe reference signal resources to be used, and the apparatus further includes a component for determining the order of the set of probe reference signal resources to be used based on the received second indication.

9. The apparatus of claim 8, wherein the first indication and the second indication are received in the same field of the downlink control information.

10. The apparatus according to claim 8 or 9, wherein when the multi-transmission receiving point physical uplink shared channel scheme is applicable, the apparatus further comprises: A component for determining the order of the probe reference signal resource sets to be used by determining whether to start with a value corresponding to a first probe reference signal resource set or a second probe reference signal resource set.

11. The apparatus of claim 8 or 9, wherein when the single transmit receiver physical uplink shared channel scheme is applicable, the at least one field of the downlink control information is interpreted by at least one of the following: Considering the subfields of at least one field of the downlink control information, and The parameter value is determined based on the subfield.

12. The apparatus according to claim 11, wherein: When the at least one field of the downlink control information includes a first probe reference signal resource indicator field and a second probe reference signal resource indicator field, the subfield is either the first probe reference signal resource indicator field or the second probe reference signal resource indicator field; When the at least one field of the downlink control information includes a first precoding information and a layer digital segment and a second precoding information and a layer digital segment, the subfield is either the first precoding information and a layer digital segment or the second precoding information and a layer digital segment; When the at least one field of the downlink control information includes a first transmit power control command field and a second transmit power control command field, the subfield is either the first transmit power control command field or the second transmit power control command field. When the at least one field of the downlink control information includes a first phase tracking reference signal demodulation reference signal association field and a second phase tracking reference signal demodulation reference signal association field, the subfield is either the first phase tracking reference signal demodulation reference signal association field or the second phase tracking reference signal demodulation reference signal association field. When the at least one field of the downlink control information includes a single phase tracking reference signal demodulation reference signal association field, the subfield is part of the phase tracking reference signal demodulation reference signal association field.

13. The apparatus according to any one of claims 8-9 and 12, wherein the at least one field of the downlink control information comprises at least one of the following: a first probe reference signal resource indicator field, a second probe reference signal resource indicator field, a first precoding information and layer digital segment, a second precoding information and layer digital segment, a first transmit power control command field, a second transmit power control command field, a first phase tracking reference signal demodulation reference signal association field, and a second phase tracking reference signal demodulation reference signal association field.

14. The apparatus according to any one of claims 8-9 and 12, wherein when the multi-transmitter receiver physical uplink shared channel scheme is applicable, the at least one downlink control information field is interpreted by at least one of the following: Taking into account the entire at least one downlink control information field, the device further includes: A component for determining the values ​​of two parameters based on the entire at least one downlink control information field.

15. An apparatus configured to be operable at a base station, the apparatus comprising: Components used to send a first indication toward the user equipment in downlink control information; The first indication enables the user equipment to determine whether to apply a multi-transmitter-receiver physical uplink shared channel scheme or a single-transmitter-receiver physical uplink shared channel scheme; and The first indication also enables the user equipment to interpret at least one field of the downlink control information differently depending on whether the single transmit receiver point physical uplink shared channel scheme or the multi-transmitter receiver point physical uplink shared channel scheme is applicable. A component for sending a second instruction to the user equipment. When the single-transmission-receive-point physical uplink shared channel scheme is applicable, the second indication indicates the index of the probe reference signal resource set; and When the multi-transmission receiving point physical uplink shared channel scheme is applicable, the second indication indicates the order of the set of probe reference signal resources to be used.

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