Channel state information reference signal antenna port adaptation in wireless communication system

Abstract

Systems and methods for network power saving with performance of channel state information (CSI) reporting are disclosed herein. A base station may configure a plurality of periodic CSI (P-CSI) reporting configurations to a UE, and then dynamically indicate to the UE which of the P-CSI reporting configurations is to use. The base station may configure a CSI report with multiple sub-configurations (e.g., a P-CSI report configuration and / or an aperiodic CSI (A-CSI) configuration) to the UE, and then dynamically indicate to the UE which of the sub-configurations is to use. A base station may configure an M-bit reference signal (CSI-RS) bitmap indicating a set of active CSI-RS ports at the base station such that the UE may use those CSI-RS ports in an expected manner to perform CSI measurements.

Description

Technical Field

[0001] This application relates in general to wireless communication systems, including wireless communication systems that use the CSI reporting process. Background Technology

[0002] Wireless mobile communication technologies use various standards and protocols to transmit data between base stations and wireless communication devices. Wireless communication system standards and protocols may include, for example, 3GPP Long Term Evolution (LTE) (e.g., 4G), 3GPP New Radio (NR) (e.g., 5G), and the IEEE 802.11 standard for Wireless Local Area Networks (WLANs) (often referred to within industry organizations as...). ).

[0003] As envisioned by 3GPP, different wireless communication system standards and protocols can use various radio access networks (RANs) to enable communication between RAN base stations (sometimes referred to as RAN nodes, network nodes, or simply nodes) and wireless communication equipment called user equipment (UEs). 3GPP RANs can include, for example, Global System for Mobile Communications (GSM), Enhanced Data Rate GSM Evolution (EDGE) RAN (GERAN), Universal Terrestrial Radio Access Network (UTRAN), Evolved Universal Terrestrial Radio Access Network (E-UTRAN), and / or Next Generation Radio Access Network (NG-RAN).

[0004] Each RAN can use one or more Radio Access Technologies (RATs) for communication between the base station and the UE. For example, GERAN implements the GSM and / or EDGE RAT, UTRAN implements the Universal Mobile Telecommunications System (UMTS) RAT or other 3GPP RATs, E-UTRAN implements the LTE RAT (sometimes simply referred to as LTE), and NG-RAN implements the NR RAT (sometimes referred to herein as the 5G RAT, 5G NR RAT, or simply NR). In some deployments, E-UTRAN may also implement the NR RAT. In some deployments, NG-RAN may also implement the LTE RAT.

[0005] The base stations used by a RAN can correspond to that RAN. An example of an E-UTRAN base station is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Node B (also commonly referred to as Evolved Node B, Enhanced Node B, eNodeB, or eNB). An example of an NG-RAN base station is a Next Generation Node B (sometimes also called gNodeB or gNB).

[0006] The RAN provides its communication services to external entities through its connection with the core network (CN). For example, E-UTRAN may utilize the evolved packet core (EPC), while NG-RAN may utilize the 5G core network (5GC). Attached Figure Description

[0007] To facilitate the identification of any particular element or action in the discussion, one or more of the most significant digits in the reference numerals refer to the figure number in which the element was first introduced.

[0008] Figure 1 A table illustrating the configurations of each group of P-CSI reports that can be provided to the UE according to the definition of an implementation scheme is shown.

[0009] Figure 2 Various antenna array configurations, corresponding to various P-CSI report configurations already configured for the UE, are illustrated according to one implementation scheme.

[0010] Figure 3 An example of a MAC CE for dynamically instructing the P-CSI report configuration to the UE according to one implementation is shown.

[0011] Figure 4 An example of a DCI format for activating P-CSI report configuration according to one implementation scheme is shown.

[0012] Figure 5 An example is provided of a group common DCI format for activating one or more P-CSI report configurations according to one implementation scheme.

[0013] Figure 6 An example of a UE-specific DCI format that can be used for P-CSI report activation according to one implementation scheme is shown.

[0014] Figure 7 An example of a DCI format for triggering A-CSI is shown according to one implementation scheme.

[0015] Figure 8 A method for a UE according to an implementation scheme is shown.

[0016] Figure 9 A method for a base station according to an implementation scheme is shown.

[0017] Figure 10 An example of a P-CSI reporting configuration, based on one implementation, is shown, listing various sub-configurations for providing CSI feedback.

[0018] Figure 11 An example of a MAC CE for dynamically instructing the UE on the P-CSI report configuration is shown according to one implementation.

[0019] Figure 12 The DCI format of a sub-configuration for activating the P-CSI reporting configuration is illustrated according to one implementation scheme.

[0020] Figure 13 An example is provided of a group common DCI format for activating one or more sub-configurations of a P-CSI reporting configuration according to one implementation scheme.

[0021] Figure 14 An example of a UE-specific DCI format for a sub-configuration that can be used to activate the P-CSI reporting configuration, according to one implementation scheme, is illustrated.

[0022] Figure 15 An example of a DCI format for triggering A-CSI is shown according to one implementation scheme.

[0023] Figure 16 An example of a UE method according to one implementation scheme is given.

[0024] Figure 17 A method for a base station according to one implementation is shown.

[0025] Figure 18 An example is provided of a group common DCI format for conveying one or more M-bit CSI-RS port bitmap fields, according to one implementation scheme.

[0026] Figure 19 An example of an antenna board NULA arrangement for a CSI feedback process according to one implementation is shown.

[0027] Figure 20 An example of an antenna board NULA arrangement for a CSI feedback process according to one implementation is shown.

[0028] Figure 21 A method for a UE according to one implementation is shown.

[0029] Figure 22 An example of a base station method according to one implementation scheme is given.

[0030] Figure 23 An example architecture of a wireless communication system according to the implementation scheme disclosed herein is illustrated.

[0031] Figure 24 A system for performing signaling between a wireless device and a network device according to an embodiment disclosed herein is illustrated. Detailed Implementation

[0032] Various implementations are described with reference to the UE. However, the reference to the UE is provided for illustrative purposes only. The example implementations can be used with any electronic component that can establish a connection to a network and is configured with hardware, software, and / or firmware for exchanging information and data with the network. Therefore, the UE described herein is used to represent any suitable electronic component.

[0033] In various wireless communication networks, implementing power-saving methods at the network side (e.g., at the base station of the RAN) can be beneficial. Therefore, techniques can be developed for and implemented at the base station and / or UE to allow and / or facilitate power savings at the network. Such techniques may involve dynamically and / or semi-statically implementing such reduced power conditions. These techniques may utilize finer-grained adaptations of transmission and / or reception related to one or more of the time, frequency, spatial, and / or power domains. Support / feedback from the UE to the base station (including, for example, the use of UE assistance information) is conceivable.

[0034] When it comes to the spatial domain, it is conceivable that improvements to Channel State Information (CSI) reporting can be applied in wireless communication systems to achieve desired power savings at the network level.

[0035] Various wireless communication networks can support different CSI reporting types. These reporting types may include, for example, periodic CSI (P-CSI) reporting type, semi-persistent (SP) CSI (SP-CSI) reporting type, and aperiodic CSI (A-CSI) reporting type.

[0036] It is possible that in some such networks, for periodic CSI reporting, the maximum number of configurable CSI reference signal (CSI-RS) resource sets is limited to S=1, and this (one) CSI-RS resource set can use one or more CSI-RS resources, where each such CSI-RS resource is configured with the same number M antenna ports (where M is at most 32).

[0037] However, as discussed in this paper, other methods can be used to provide additional flexibility to the network. For example, the approach presented in this paper allows the network to more quickly adjust its use of the current CSI reporting style to match the appropriate complexity for the current network conditions. Thus, when network conditions permit, the network can save power by dynamically and relatively quickly selecting a less complex CSI reporting layout.

[0038] Figure 1 Table 100 illustrates the various P-CSI report configuration groups that can be provided to the UE according to the definition of an implementation scheme. Table 100 may correspond to a two-step P-CSI report selection process.

[0039] For reference Figure 1 As can be seen, the P-CSI report configuration groups are indexed from 1 to 7 in Table 100, and each group includes four P-CSI report configurations. Each P-CSI report configuration defines how the CSI-RS used to generate the P-CSI report can be sent from the base station to the UE. It should be noted that, as illustrated in Table 100, the number of P-CSI report configuration groups known at the base station, the number of P-CSI report configurations constituting each group, and the content of each P-CSI report configuration constituting each group are given as examples (not as limitations).

[0040] P-CSI report configuration groups (e.g., one of these groups is represented by indices 1-7) can be specified by the base station for use with component carriers (CCs) used between the UE and the base station. The base station can then send the specified P-CSI report configurations to the UE. In this way, the UE is informed that the base station may expect P-CSI report configuration groups for future adaptation of P-CSI reports for CCs. For example, if the base station specifies the P-CSI report configuration group represented by index 1 in Table 100, the base station will send the four P-CSI report configurations corresponding to index 1 to the UE. In some cases, the base station may provide the P-CSI report configuration groups to the UE via Radio Resource Control (RRC) signaling.

[0041] It should be noted that although Table 100 is provided here for clarity, the base station may not actually store / use a table like Table 100 to formulate the P-CSI report configuration group (e.g., the base station may formulate the P-CSI report configuration to be transmitted to the UE in a manner other than referring to any index table of, for example, a pre-established P-CSI report configuration group).

[0042] Each P-CSI reporting configuration within a group is configured with various parameters. For example, it is possible that each P-CSI reporting configuration provided to the UE within a group has a separate CSI-RS resource set configuration. It is also possible that each of these separate CSI-RS resource set configurations is for a different number of CSI-RS ports for the corresponding CSI-RS resources to be used for that set. For example, in the group represented by index 1 in Table 100, it can be seen that the first P-CSI reporting configuration (represented by "#1") is for 32 CSI-RS ports, the second P-CSI reporting configuration (represented by "#2") is for 16 CSI-RS ports, the third P-CSI reporting configuration (represented by "#3") is for 8 CSI-RS ports, and the fourth P-CSI reporting configuration (represented by "#4") is for 4 CSI-RS ports.

[0043] Furthermore, one or more P-CSI reporting configurations within a group may include multiple antenna panel quantity configurations. For example, in the group represented by index 4 in the table, the first P-CSI reporting configuration is for the use of four antenna panels, the second P-CSI reporting configuration is for the use of two antenna panels, and the third and fourth P-CSI reporting configurations are for the use of one antenna panel. As indicated in Table 100, the P-CSI configuration groups represented by indices 1-3 do not have P-CSI reporting configurations for more than one antenna panel, while the P-CSI configuration groups represented by indices 4-7 do have P-CSI reporting configurations for more than one antenna panel.

[0044] One or more P-CSI reporting configurations in a group may include multiple antenna array configurations. Such configurations define the arrangement of antennas on one or more antenna panels required in the P-CSI reporting configuration. This can be achieved by...<N1,N2> This is achieved by specifying the number of antenna elements "N1" in the horizontal direction and the number of antenna elements "N2" in the vertical direction. Note that each such antenna element can be cross-polarized, such that it corresponds to two CSI-RS ports of the CSI-RS resource configured for a given P-CSI report.

[0045] One or more P-CSI reporting configurations in a group may include multiple Codebook Subset Limitation (CSBR) bitmap configurations. For example, in the group represented by index 1 in the table, the first P-CSI reporting configuration is for use with a 64-bit bitmap configuration, the second P-CSI reporting configuration is for use with a 32-bit bitmap configuration, the third and fourth P-CSI reporting configurations are for use with a 16-bit bitmap configuration, and the fourth P-CSI reporting configuration is for use with an 8-bit bitmap configuration.

[0046] One or more P-CSI reporting configurations in a group may include multiple reporting periodicity configurations (not illustrated in Table 100).

[0047] One or more P-CSI reporting configurations in a group may include multiple frequency granularity configurations (not illustrated in Table 100). For example, P-CSI reporting configurations in a group may represent multiple frequency granularities (e.g., wideband to subband) for the Channel Quality Index (CQI) and / or Precoder Matrix Indicator (PMI).

[0048] In some designs targeting P-CSI reporting configuration groups, the antenna port layout supported by the switching operation may be limited depending on the antenna array configuration with the “maximum” number of CSI-RS ports found in the group. Figure 2Examples of various antenna array configurations 202a to 208a, corresponding to P-CSI report configuration groups 202b to 208b already configured for the UE, are illustrated according to one implementation. Figure 2 In the illustrated implementation, the first antenna array configuration 202a corresponds to the first P-CSI report configuration 202b, the second antenna array configuration 204a corresponds to the second P-CSI report configuration 204b, the third antenna array configuration 206a corresponds to the third P-CSI report configuration 206b, and the fourth antenna array configuration 208a corresponds to the fourth P-CSI report configuration 208b.

[0049] exist Figure 2 In the implementation plan, P-CSI reporting configurations 202b to 208b can be Figure 1 The P-CSI report configuration group is represented by index 2 of Table 100. Therefore, it can be seen that antenna array configurations 202a to 208a match the antenna array configurations indicated in these CSI reports.

[0050] refer to Figure 1 From index 2 of Table 100, it can be determined that the first P-CSI reporting configuration (e.g., the first P-CSI reporting configuration 202b) with the maximum number of CSI-RS ports (32) has an antenna array configuration <8,2>. Therefore, it is expected that the second P-CSI reporting configuration 204b, the third P-CSI reporting configuration 206b, and the fourth P-CSI reporting configuration 208b use antenna array configurations sized to fit within the dimension <8,2>. For example, the second P-CSI reporting configuration 204b uses an antenna array configuration <4,2> (as illustrated in the second antenna array configuration 204a), the third P-CSI reporting configuration 206b uses an antenna array configuration <2,2> (as illustrated in the third antenna array configuration 206a), and the fourth P-CSI reporting configuration 208b uses an antenna array configuration <2,1>.

[0051] Therefore, it can be seen that as the UE continues to perform one or more of the first P-CSI report configurations 202b to the fourth P-CSI report configuration 208b, fewer overall antenna elements are required to transmit CSI-RS for a specific P-CSI report configuration (and thus less power can be used at the base station).

[0052] The P-CSI report configuration group transmitted to the UE may include the same configuration for some parameters, such as the “reportQuantity” parameter.

[0053] Once the base station provides / configures a P-CSI reporting configuration group to the UE, the base station can provide signaling to the UE to dynamically indicate which P-CSI reporting configuration in that group the base station is using to send CSI-RS. This gives the base station flexibility, as it can dynamically and relatively quickly move the CSI reporting process between the base station and the UE from a more complex P-CSI reporting configuration to a less complex one, for example, when network conditions permit (and thus achieve power savings at the network).

[0054] Consider various methods for providing a signaling indication to the UE of the P-CSI reporting configuration to be used. In a first case, the indication of the P-CSI reporting configuration can be sent in a Media Access Control (MAC) CE. Such a MAC CE can be identified by a MAC subheader having a dedicated Logical Channel Identifier (LCID) for the Media Access Control (MAC) CE, which includes such an indication. The MAC CE can have a fixed size.

[0055] Figure 3 An example of a MAC CE300 for dynamically instructing a UE on P-CSI reporting configuration according to one embodiment is illustrated. The MAC CE 300 may include multiple octets N, which together contain a pair of information elements (IEs). Figure 3 In the implementation scheme, N=1 (other cases are also conceivable). In MAC CE 300, there is a reserved bit 302 (bit 0), five bits (bits 1 to 5) for Serving Cell Identifier (ID) IE 304, which indicates the identifier of the serving cell for which the MAC CE is providing P-CSI reporting configuration instructions, and two bits (bits 6 and 7) for P-CSI ID IE 306 to indicate the specific P-CSI reporting configuration that should be used on the CC of the identified serving cell.

[0056] P-CSI ID IE 306 uses two bits to correspond to the case where there are four P-CSI reporting configuration groups previously configured to the UE (where the four P-CSI configurations can be uniquely represented using two bits). More generally, it can be understood that when M represents the total number of P-CSI configurations provided to the UE by the base station, the number of bits required for P-CSI ID IE can be log2(M). Then, to indicate a specific P-CSI reporting configuration, P-CSI ID IE 306 can indicate the value k corresponding to the k-th sub-configuration. Therefore, when the base station configures many P-CSI configurations to the UE, MAC CE can use more than N=1 octets to accommodate the bits of an appropriately sized P-CSI ID IE.

[0057] In some cases, time instances n+T can be used. procActivate the P-CSI report configuration provided by the MAC CE. In some cases, n can be a timeslot of the Physical Downlink Shared Channel (PDSCH) containing the MAC CE, or a timeslot of the Physical Uplink Control Channel (PUCCH) containing Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) signaling for the PDSCH.

[0058] In addition, T proc This can be the processing time used to apply the first P-CSI report configuration at the UE. In some cases, T proc The value can be pre-established by a specification that defines the behavior of a wireless communication system (e.g., the specification could define T). proc = 3 milliseconds (ms). In some cases, such a specification may be T. proc Provide a set of candidate values, and then the UE indicates the appropriate / desired T to the base station via UE capability report / messaging. proc (For example, corresponding to UE capabilities).

[0059] In a second case of the method for providing signaling indication of P-CSI report configuration to the UE, the downlink control information (DCI) format used to activate / deactivate a specific P-CSI report configuration in the P-CSI report configuration group configured to the UE can be used.

[0060] Figure 4 An example of a DCI format 400 for activating a P-CSI report configuration according to one implementation is illustrated. The DCI format 400 may represent, for example, a (modified) format of a non-backoff scheduled DCI of X_1 and / or X_2, as understood in some specifications of some wireless communication systems.

[0061] The P-CSI ID field 402 of DCI format 400 can indicate a specific P-CSI reporting configuration that should be activated at the receiving UE for P-CSI reporting.

[0062] In at least some cases, as illustrated, the serving cell ID field 404 may include the serving cell ID field 404. The serving cell ID field 404 of the DCI format 400 may indicate the serving cell corresponding to the CC for which a specific P-CSI reporting configuration should be activated at the receiving UE. Including the serving cell ID field 404 enables cross-carrier P-CSI reporting configuration selection (e.g., indicating the target serving cell by using the DCI received on the current serving cell, rather than waiting to use the DCI on the target serving cell itself). It should be noted that without the serving cell ID field 404, it can be assumed that the P-CSI ID field included in the DCI applies to the CC of the serving cell on which the DCI was received itself.

[0063] Other DCI fields 406 of DCI format 400 may include fields in DCI format 400 other than those related to P-CSI report configuration (e.g., fields that already exist / are used in DCI for formats X_1 and / or X_2, as discussed above).

[0064] The Cyclic Redundancy Check (CRC) bit 408 of DCI format 400 can be applied at the UE to the UE's Radio Network Temporary Identifier (RNTI) to allow the UE to identify DCI format 400 as targeting / pointing to the UE.

[0065] Figure 5 An example of a group common DCI format 500 for activating one or more P-CSI reporting configurations according to one implementation is illustrated. The group common DCI format 500 enables the activation / deactivation of P-CSI reporting configurations for multiple CCs in a single DCI and / or for one or more UEs using those CCs.

[0066] Group Common DCI Format 500 may include multiple CSI block fields (e.g., in...) Figure 5 (These are labeled "CSI Block #1" through "CSI Block #n"). Each such CSI Block field may include each of the following: a P-CSI ID field that identifies the P-CSI reporting configuration and a serving cell ID field that identifies the serving cell to which the indicated P-CSI reporting configuration should be applied.

[0067] One or more CSI block fields in a CSI block field can be understood as being specific to a particular UE. For example, as illustrated, the first CSI block field 506 of the group common DCI format 500 (including “CSI block #1” through “CSI block #4”) is for the first UE 502, while the additional CSI block field 508 is alternatively intended for subsequent / other UEs 504.

[0068] Upon receiving Group Common DCI Format 500, the UE can use the parameter “startingBitOfFormatX” provided by higher-level signaling from the UE to the UE to identify the location of one or more CSI block fields in its CSI block fields.

[0069] When a UE is configured with multiple CCs (e.g., under carrier aggregation (CA), multiple CSI block fields can be used for the same UE. For example, it is possible that the UE is configured with CCs #1 through CCs #4. In this case, each CSI block field among the multiple CSI block fields for the UE included in the group common DCI format can provide a P-CSI reporting configuration for a corresponding CC among the CCs used by the UE. For example, in group common DCI format 500, by way of example, the "CSI block #1" field can provide a P-CSI reporting configuration for CC #1 used by the first UE 502, the "CSI block #2" field can provide a P-CSI reporting configuration for CC #2 used by the first UE 502, the "CSI block #3" field can provide a P-CSI reporting configuration for CC #3 used by the first UE 502, and the "CSI block #4" field can provide a P-CSI reporting configuration for CC #4 used by the first UE 502.

[0070] The CRC bit 510 of the group common DCI format 500 can be scrambled so that one or more UEs with an appropriate RNTI (e.g., CSI-RNTI) can identify that the group common DCI format 500 is for that UE, and thus can include one or more CSI block fields for that UE. The RNTI can be configured to the UE via higher-layer signaling from the base station.

[0071] Figure 6 An example of a UE-specific DCI format 600 available for P-CSI report activation according to one implementation is illustrated. The UE-specific DCI format 600 can improve the reliability of DCI reception and / or allow for more flexible CSBR based on the latest beam reports.

[0072] The P-CSI ID field 602 of the UE-specific DCI format 600 can indicate a specific P-CSI reporting configuration that should be activated at the receiving UE.

[0073] In at least some cases, as illustrated, the UE-specific DCI format 600 may include a serving cell ID field 604. The serving cell ID field 604 of the UE-specific DCI format 600 may indicate the serving cell corresponding to the CC for which a specific P-CSI reporting configuration should be activated at the receiving UE. Including the serving cell ID field 604 enables cross-carrier P-CSI reporting configuration selection (e.g., indicating the target serving cell by using the DCI received on the current serving cell, rather than waiting to use the DCI on the target serving cell itself). It should be noted that without the serving cell ID field, it can be assumed that the P-CSI ID field included in the DCI applies to the CC of the serving cell on which the DCI was received itself.

[0074] The UE-specific DCI format 600 may also include a CBSR field 606. In some cases, the CBSR field 606 uses a number of bits M equal to the size of the largest CSBR bitmap configuration in the P-CSI report group configured for the UE. For example, in Figure 1 In the P-CSI report configuration group represented by index 1 in Table 100, there are CSBR bitmap configurations for 64-bit, 32-bit, 16-bit, and 8-bit, with the largest CSBR bitmap configuration being for 64-bit. Therefore, when this P-CSI report configuration group is configured to the UE, the UE can understand that CBSR field 606 uses 64 bits.

[0075] Then, once a P-CSI report configuration for that group is actively selected and in use, it is possible that the least significant bit P in the CBSR field 606, corresponding to the number of bits in the CSBR bitmap configuration for that particular P-CSI, is used to indicate the CSBR information between the base station and the UE.

[0076] The UE-specific DCI format 600 may also include padding bits 608, which may be included such that the payload size of the UE-specific DCI format 600 is equal to the payload size of a DCI format known to the wireless communication system. For example, in the case of an LTE or NR wireless communication system, padding bits 608 may be included in the UE-specific DCI format 600 such that it is the same size as DCI formats 0_1 or 1_1 that may be known in such systems. This ensures that the use of the UE-specific DCI format 600 does not increase the amount of processing required to perform blind decoding of the DCI at the UE.

[0077] UE-specific DCI format 600 can be identified by a dedicated RNTI (which may be referred to as, for example, "Y-RNTI"), which is used to scramble the CRC bit 610 of UE-specific DCI format 600, so that the UE can use the dedicated RNTI to identify UE-specific DCI format 600.

[0078] It is further conceivable that additional flexibility can also be achieved by combining group CSI reporting configurations (e.g., P-CSI reporting configuration groups as discussed previously in Table 100) in the case of A-CSI.

[0079] Figure 7The discussion assumes the use of an A-CSI reporting configuration group that matches, for example, one of the P-CSI reporting configuration groups indexed in Table 100. Therefore, while the discussion will refer to Table 100, it should be understood that this refers to a table of correspondences for A-CSI configuration groups, one of which can be configured individually for the UE, or it can be a reuse of a P-CSI reporting configuration group from Table 100 in the A-CSI case by the UE. In this case, the individual configuration in Table 100 may be referred to as an A-CSI reporting configuration rather than a P-CSI reporting configuration.

[0080] It can be assumed that the UE is configured with an A-CSI reporting configuration group corresponding to index 1 in Table 100. Furthermore, the UE can be configured to select an A-CSI reporting configuration from this configuration group based on the triggering state present in the DCI.

[0081] Figure 7 An example of a DCI format 700 for triggering A-CSI according to one embodiment is illustrated. The DCI format 700 may include a CSI request field 702 indicating the triggering state for A-CSI. For example, it is possible that the triggering state corresponds to or is associated with an A-CSI report configuration group under discussion. Therefore, in this case, the UE will select an A-CSI report configuration from that group to generate a CSI report.

[0082] Furthermore, as illustrated, DCI format 700 includes an A-CSI ID field 704. As illustrated, the presence of both the CSI request field 702 and the A-CSI ID field 704 allows the UE to interpret, using conditional interpretation (based on identifying the specific A-CSI report configuration group by using the trigger state information of the CSI request field 702), that the value or index provided in the sub-configuration indicator A-CSI ID field 704 is a sub-configuration within that A-CSI report configuration group. Therefore, the UE can use an A-CSI report configuration indicated in the A-CSI report configuration group to generate (non-periodic) CSI reports for transmission to the base station.

[0083] Other DCI fields 706 of DCI format 700 may include other fields in DCI besides those related to sub-configuration (e.g., fields that exist / have been used in DCI formats X_1 and / or X_2 that may be used in some wireless communication systems, and where DCI format 700 follows one of these formats / is one of these formats).

[0084] The CRC bit 708 of DCI format 1400 can be applied to the UE's RNTI at the UE to allow the UE to identify DCI format 1400 as targeting / pointing to the UE.

[0085] Figure 8 A method 800 for a UE according to one embodiment is illustrated. Method 800 includes receiving 802 from a base station a configuration of multiple P-CSI reports for providing CSI feedback corresponding to a CC used by the UE.

[0086] Method 800 also includes receiving from the base station 804 an indication of a first P-CSI report configuration among a plurality of P-CSI report configurations for CC.

[0087] Method 800 also includes generating 806 CSI feedback for CC based on the configuration of the first P-CSI report.

[0088] Method 800 also includes sending 808 CSI feedback for CC to the base station.

[0089] In some implementations of method 800, the multiple P-CSI reporting configurations include multiple CSI-RS resource set configurations, wherein each of the multiple CSI-RS resource set configurations is for a different number of CSI-RS ports of CSI-RS resources in the CSI-RS resource set.

[0090] In some implementations of method 800, the multiple P-CSI reporting configurations include one or more of multiple antenna panel quantity configurations, multiple antenna array configurations, multiple CSBR bitmap configurations, multiple reporting periodicity configurations, and multiple frequency granularity configurations.

[0091] In some embodiments of method 800, an indication of a first P-CSI report configuration is received in a MAC CE, the MAC CE including a serving cell ID IE identifying the serving cell corresponding to the CC and a P-CSI ID IE identifying the first P-CSI report configuration. In some embodiments of these embodiments, method 800 also includes receiving an indication of a first P-CSI report configuration in time instance n+T. proc Then, the first P-CSI report configuration is applied, where n is one of the first timeslot of the PDSCH containing the MAC CE and the second timeslot of the PUCCH containing the HARQ-ACK signaling for the PDSCH, and where T proc The processing time configured for applying the first P-CSI report.

[0092] In some embodiments of method 800, an indication of a first P-CSI report configuration is received in a scheduling DCI format, the scheduling DCI format including a P-CSI ID field identifying the first P-CSI report configuration. In some of these embodiments, the scheduling DCI format also includes a serving cell ID field identifying the serving cell corresponding to the CC.

[0093] In some embodiments of method 800, an indication of a first P-CSI report configuration is received in a group common DCI format with CRC bits scrambled by a dedicated RNTI for a plurality of UEs including the UE, and the CSI block field of the UE in the group common DCI format corresponding to the CC identifies that the first sub-configuration is for the CC.

[0094] In some embodiments of method 800, an indication of a first P-CSI report configuration is received in a UE-specific DCI format corresponding to the UE, the DCI format including a serving cell ID field identifying the serving cell corresponding to the CC, a P-CSI field identifying the first P-CSI report configuration, and a CSBR field.

[0095] The embodiments contemplated herein include an apparatus comprising components for performing one or more elements of method 800. This apparatus may be, for example, a device of a UE (such as wireless device 2402 as a UE, as described herein).

[0096] The embodiments contemplated herein include one or more non-transitory computer-readable media comprising instructions that, when executed by one or more processors of an electronic device, cause the electronic device to perform one or more elements of method 800. The non-transitory computer-readable medium may be, for example, the memory of a UE (such as memory 2406 of a wireless device 2402 serving as a UE, as described herein).

[0097] The embodiments contemplated herein include an apparatus comprising logic, modules, or circuitry for performing one or more elements of method 800. This apparatus may be, for example, a device of a UE (such as wireless device 2402 as a UE, as described herein).

[0098] The embodiments contemplated herein include an apparatus comprising: one or more processors and one or more computer-readable media, the computer-readable media including instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of method 800. The apparatus may be, for example, a UE (such as wireless device 2402 as a UE, as described herein).

[0099] The implementation scheme envisioned herein includes a signal as described in or in connection with one or more elements of method 800.

[0100] The embodiments contemplated herein include a computer program or computer program product comprising instructions, wherein the program is executed by a processor to cause the processor to perform one or more elements of method 800. The processor may be a processor of the UE (such as processor 2404 as a wireless device 2402 of the UE, as described herein). These instructions may, for example, reside in the processor of the UE and / or in memory (such as memory 2406 as a wireless device 2402 of the UE, as described herein).

[0101] Figure 9 A method 900 for a base station according to an embodiment is shown. Method 900 includes sending 902 to a UE to provide a configuration of multiple P-CSI reports corresponding to CSI feedback of a CC used by the UE.

[0102] Method 900 also includes sending to the UE an indication of the first P-CSI reporting configuration among the multiple P-CSI reporting configurations for CC 904.

[0103] Method 900 also includes sending 906 CSI-RS corresponding to the first P-CSI report configuration to the UE on the CC.

[0104] Method 900 also includes receiving 908 CSI feedback for CC from the UE.

[0105] In some implementations of method 900, the multiple P-CSI reporting configurations include multiple CSI-RS resource set configurations, wherein each of the multiple CSI-RS resource set configurations is configured for a different number of CSI-RS ports for CSI-RS resources in the CSI-RS resource set.

[0106] In some implementations of method 900, multiple P-CSI reporting configurations include one or more of multiple antenna panel quantity configurations, multiple antenna array configurations, multiple CSBR bitmap configurations, multiple reporting periodicity configurations, and multiple frequency granularity configurations.

[0107] In some embodiments of method 900, an indication of a first P-CSI report configuration is sent in a MAC CE, the MAC CE including a serving cell ID IE identifying the serving cell corresponding to the CC and a P-CSI ID IE identifying the first P-CSI report configuration. In some embodiments of these embodiments, method 900 also includes sending an indication of a first P-CSI report configuration in time instance n+T. procThen, the first P-CSI report configuration is applied, where n is one of the first timeslot of the PDSCH containing the MAC CE and the second timeslot of the PUCCH containing the HARQ-ACK signaling for the PDSCH, and where T proc The processing time configured for applying the first P-CSI report.

[0108] In some embodiments of method 900, an instruction for a first P-CSI report configuration is transmitted in a scheduling DCI format, which includes a P-CSI ID field identifying the first P-CSI report configuration. In some of these embodiments, the scheduling DCI format also includes a serving cell ID field identifying the serving cell corresponding to the CC.

[0109] In some embodiments of method 900, an indication of a first P-CSI report configuration is sent in a group common DCI format with CRC bits scrambled by a dedicated RNTI for multiple UEs including the UE, and the CSI block field of the UE in the group common DCI format corresponding to the CC identifies that the first sub-configuration is for the CC.

[0110] In some embodiments of method 900, an indication of a first P-CSI report configuration is sent in a UE-specific DCI format corresponding to the UE, the DCI format including a serving cell ID field identifying the serving cell corresponding to the CC, a P-CSI field identifying the first P-CSI report configuration, and a CSBR field.

[0111] The embodiments contemplated herein include an apparatus comprising components for performing one or more elements of method 900. This apparatus may be, for example, a base station apparatus (such as network device 2418 as a base station, as described herein).

[0112] The embodiments contemplated herein include one or more non-transitory computer-readable media comprising instructions that, when executed by one or more processors of an electronic device, cause the electronic device to perform one or more elements of method 900. The non-transitory computer-readable medium may be, for example, the memory of a base station (such as memory 2422 of a network device 2418 serving as a base station, as described herein).

[0113] The embodiments contemplated herein include an apparatus comprising logic, modules, or circuitry for performing one or more elements of method 900. This apparatus may be, for example, a base station apparatus (such as network device 2418 as a base station, as described herein).

[0114] The embodiments contemplated herein include an apparatus comprising: one or more processors and one or more computer-readable media including instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of method 900. The apparatus may be, for example, a base station apparatus (such as network device 2418 as a base station, as described herein).

[0115] The implementation scheme envisioned herein includes a signal as described in or in connection with one or more elements of method 900.

[0116] The embodiments contemplated herein include a computer program or computer program product comprising instructions, wherein the program is executed by a processing element to cause the processing element to perform one or more elements of method 900. The processor may be a processor of a base station (such as processor 2420 of network device 2418 as a base station, as described herein). These instructions may, for example, reside in the processor and / or on the memory of the base station (such as memory 2422 of network device 2418 as a base station, as described herein).

[0117] Figure 10 An example of a P-CSI reporting configuration 1000, according to one embodiment, is shown, listing various sub-configurations for providing CSI feedback. P-CSI reporting configuration 1000 includes a first sub-configuration 1002, a second sub-configuration 1004, a third sub-configuration 1006, and additional sub-configurations up to and including an nth sub-configuration 1008. It should be noted that in other embodiments, fewer than four sub-configurations may exist in the P-CSI reporting configuration. Based on the various embodiments of the P-CSI reporting configuration 1000 contemplated herein, it should be understood that zero or more additional sub-configurations may exist between the third sub-configuration 1006 and the nth sub-configuration 1008.

[0118] As illustrated, each of the sub-configurations 1002 to 1008 includes a CSI-RS resource set configuration 1010. Each CSI-RS resource set configuration 1010 may be a CSI-RS resource set for configuring the UE to use CSI-RS resources in a CSI-RS resource set with a different number of CSI-RS ports. For example, as illustrated, the first sub-configuration 1002 may use a "CSI-RS resource set #1" configuration for the use of CSI-RS resources in set #1 with multiple CSI-RS ports A1, the second sub-configuration 1004 may use a "CSI-RS resource set #2" configuration for the use of CSI-RS resources in set #2 with multiple CSI-RS ports A2, the third sub-configuration 1006 may use a "CSI-RS resource set #3" configuration for the use of CSI-RS resources in set #3 with multiple CSI-RS ports A3, and the nth sub-configuration 1008 may use a configuration for the use of CSI-RS resources in set #3 with multiple CSI-RS ports A1. N The CSI-RS resources used in set #N are configured in “CSI-RS Resource Set #N”, where A1≠A2≠A3≠A N .

[0119] Each of the sub-configurations 1002 through 1008 also includes a codebook configuration IE 1012. The codebook configuration IE 1012 can define the codebook type (e.g., type 1 or type 2) to be used for the CSI feedback of each sub-configuration.

[0120] The codebook configuration for IE 1012 for each of the sub-configurations 1002 to 1008 may also include...<Ng,N1,N2> The configuration is defined as follows: Ng is the number of antenna panels, N1 indicates the number of antenna elements in the horizontal direction, and N2 indicates the number of antenna elements in the vertical direction of each sub-configuration.

[0121] The codebook configuration IE 1012 for each of the sub-configurations 1002 to 1008 may also include a CSBR bitmap configuration (e.g., indicating the number of bits used in the CSBR bitmap for the corresponding sub-configuration).

[0122] Once a UE is configured with a P-CSI reporting configuration having multiple sub-configurations, various methods are considered for signaling indications to the UE of the sub-configurations of the P-CSI reporting configuration to be used. In a first case, the indication of the P-CSI reporting configuration can be transmitted in a MAC CE. Such a MAC CE can be identified by a MAC subheader having a dedicated LCID for the MAC CE, which includes such indications. The MAC CE can have a fixed size.

[0123] Figure 11An example of a MAC CE 1100 for dynamically instructing the UE on a P-CSI reporting configuration, according to one implementation, is illustrated. The MAC CE 1100 may include N octets, which together contain a pair of IEs. Figure 3 In the implementation scheme, N=1 (other cases are also conceivable). In MAC CE 1100, there is a reserved bit 1102 (bit 0), five bits (bits 1 to 5) for the serving cell ID IE 1104, which indicates the identifier of the serving cell for which the MAC CE is providing P-CSI reporting configuration instructions, and two bits (bits 6 and 7) for the sub-configuration indicator IE 1106 to indicate the specific sub-configuration of the P-CSI reporting configuration that should be used on the CC of the identified serving cell.

[0124] The subconfiguration indicator IE 1106 uses two bits to correspond to the case where there are four subconfigurations in the P-CSI report configuration (where each of the four subconfigurations can be uniquely represented using two bits). More generally, it can be understood that when there are M subconfigurations in the P-CSI report configuration, the number of bits required for the subconfiguration indicator IE 1106 can be log2(M). To indicate a specific subconfiguration of the P-CSI report configuration, the subconfiguration indicator IE 1106 can indicate the value k corresponding to the k-th subconfiguration. Therefore, in the case of many subconfigurations in the P-CSI report configuration, MAC CE can use more than N=1 octets to accommodate the bits of the appropriately sized subconfiguration indicator IE.

[0125] In some cases, time instances n+T can be used. proc Activate the sub-configuration given by MAC CE. In some cases, n can be a timeslot of the Physical Downlink Shared Channel (PDSCH) containing MAC CE, or a timeslot of the Physical Uplink Control Channel (PUCCH) containing Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) signaling for the PDSCH.

[0126] In addition, T proc This could be the processing time for applying the first sub-configuration at the UE. In some cases, T proc The value can be pre-established by a specification that defines the behavior of a wireless communication system (e.g., the specification could define T). proc = 3 milliseconds (ms). In some cases, such a specification may be T. proc Provide a set of candidate values, and then the UE indicates the appropriate / desired T to the base station via UE capability report / messaging. proc (For example, corresponding to UE capabilities).

[0127] In a second case of the method for providing signaling indications of sub-configurations of the P-CSI reporting configuration to the UE, a DCI format for activating / deactivating a specific sub-configuration in the P-CSI reporting configuration may be used.

[0128] Figure 12 An example of a DCI format 1200 for activating a P-CSI reporting configuration according to one implementation is illustrated. DCI format 1200 may represent, for example, a (modified) format of a non-backoff scheduling DCI of X_1 and / or X_2, as understood in some specifications of some wireless communication systems.

[0129] The sub-configuration indicator 1202 of DCI format 1200 can indicate a specific sub-configuration that should be activated at the receiving UE.

[0130] In at least some cases, as illustrated, DCI format 1200 may include a serving cell ID field 1204. The serving cell ID field 1204 of DCI format 1200 may indicate the serving cell corresponding to the CC for which a specific sub-configuration should be activated at the receiving UE. Including the serving cell ID field 1204 enables cross-carrier sub-configuration selection (e.g., indicating the target serving cell by using the DCI received on the current serving cell, rather than waiting to use the DCI on the target serving cell itself). It should be noted that without the serving cell ID field, it can be assumed that the sub-configuration indicator 1202 included in the DCI is applicable to the CC of the serving cell on which the DCI was received itself.

[0131] Other DCI fields 1206 of DCI format 1200 may include other fields in the DCI besides those related to the sub-configuration (e.g., fields that already exist / are used in the DCI for formats X_1 and / or X_2, as discussed above).

[0132] The CRC bit 1208 of DCI format 1200 can be applied to the UE's RNTI at the UE to allow the UE to identify DCI format 1200 as being for / pointed to the UE.

[0133] Figure 13 An example of a group common DCI format 1300 for activating one or more sub-configurations of a P-CSI reporting configuration according to one implementation is illustrated. The group common DCI format 1300 enables the activation / deactivation of sub-configurations for multiple CCs in a single DCI and / or for one or more UEs using those CCs.

[0134] Group Common DCI Format 1300 may include multiple CSI block fields (e.g., in...) Figure 13(These are labeled "CSI Block #1" through "CSI Block #n"). Each such CSI Block field may include each of the following: a Subconfiguration Indicator field that identifies the subconfiguration and a Serving Cell ID field that identifies the serving cell to which the indicated subconfiguration should be applied.

[0135] One or more CSI block fields in a CSI block field can be understood as being specific to a particular UE. For example, as illustrated, the first CSI block field 1306 of the group common DCI format 1300 (including “CSI block #1” through “CSI block #4”) is for the first UE 1302, while the additional CSI block field 1308 is alternatively intended for subsequent / other UEs 1304.

[0136] Upon receiving Group Common DCI Format 1300, the UE can use the parameter “startingBitOfFormatX” provided by higher-level signaling from the UE to the UE to identify the location of one or more CSI block fields in its CSI block fields.

[0137] When a UE is configured with multiple CCs (e.g., under CA), multiple CSI block fields for the same UE can be used. For example, it is possible that the UE is configured with CCs #1 through CCs #4. In this case, each CSI block field in the multiple CSI block fields for the UE included in the group common DCI format can provide a sub-configuration for a corresponding CC among the CCs used by the UE. For example, in group common DCI format 1300, by way of example, the "CSI block #1" field can provide a sub-configuration for CC #1, the "CSI block #2" field can provide a sub-configuration for CC #2, the "CSI block #3" field can provide a sub-configuration for CC #3, and the "CSI block #4" field can provide a sub-configuration for CC #4.

[0138] The CRC bit 1310 of the group common DCI format 1300 can be scrambled so that one or more UEs with an appropriate RNTI (e.g., CRC-RNTI) can identify that the group common DCI format 1300 is for that UE, and thus can include one or more CSI block fields for that UE. The RNTI can be configured to the UE via higher-layer signaling from the base station.

[0139] Figure 14 An example of a UE-specific DCI format 1400, according to one implementation scheme, is shown that can be used to activate a P-CSI reporting configuration. The UE-specific DCI format 1400 can improve the reliability of DCI reception and / or allow for more flexible CSBR based on the latest beam reports.

[0140] The sub-configuration indicator field 1402 of the UE-specific DCI format 1400 can indicate the specific sub-configuration that should be activated at the receiving UE.

[0141] In at least some cases, as illustrated, the UE-specific DCI format 1400 may include a serving cell ID field 1404. The serving cell ID field 1404 of the UE-specific DCI format 1400 may indicate the serving cell corresponding to the CC for which a specific sub-configuration should be activated at the receiving UE. Including the serving cell ID field 1404 enables cross-carrier sub-configuration selection (e.g., indicating the target serving cell by using the DCI received on the current serving cell, rather than waiting to use the DCI on the target serving cell itself). It should be noted that without the serving cell ID field, it can be assumed that the sub-configuration indicator field 1402 included in the DCI is applicable to the CC of the serving cell on which the DCI was received itself.

[0142] The UE-specific DCI format 1400 may also include a CBSR field 1406. In some cases, the CBSR field 1406 uses a number of bits M equal to the size of the largest CSBR bitmap configuration in the sub-configuration of the P-CSI report configuration. For example, refer to Figure 10 In the P-CSI report configuration 1000, it is possible that the first sub-configuration 1002 uses a first CSBR bitmap configuration for 64 bits (“CSBR#1”), the second sub-configuration 1004 uses a second CSBR bitmap configuration for 32 bits (“CSBR#2”), the CSI-RS resource set configuration 1010 uses a third CSBR bitmap configuration for 16 bits (“CSBR#3”), and the nth sub-configuration 1008 uses a fourth CSBR bitmap configuration for 8 bits (“CSBR#4”) (and this can be assumed that there are no other sub-configurations in the P-CSI report configuration 1000). In this case, the sub-configuration with the largest CSBR bitmap configuration is 64 bits. Therefore, the UE can understand that the CBSR field 1406 uses 64 bits.

[0143] Then, once a sub-configuration is actively selected and in use, it is possible that the least significant bit P in the CBSR field 1406 corresponding to the bit of the CSBR bitmap configuration for that specific sub-configuration is used to indicate the CSBR information between the base station and the UE.

[0144] The UE-specific DCI format 1400 may also include padding bits 1408, which may be included such that the payload size of the UE-specific DCI format 1400 is equal to the payload size of a DCI format known to the wireless communication system. For example, in the case of LTE or NR wireless communication systems, padding bits 1408 may be included in the UE-specific DCI format 1400 such that it is the same size as DCI formats 0_1 or 1_1 that may be known in such systems. This ensures that the use of the UE-specific DCI format 1400 does not increase the amount of processing required to perform blind decoding of the DCI at the UE.

[0145] UE-specific DCI format 1400 can be identified by a dedicated RNTI (which may be referred to as, for example, "Y-RNTI"), which is used to scramble the CRC bit 1410 of UE-specific DCI format 1400, so that the UE can use the dedicated RNTI to identify UE-specific DCI format 1400.

[0146] In some wireless communication systems, if a resource setting linked to "CSI-ReportConfig" has multiple aperiodic CSI-RS resource sets, only one of these aperiodic CSI-RS resource sets is selected and associated with the aperiodic CSI (A-CSI) trigger state. This selection can be performed via RRC signaling.

[0147] However, it is conceivable that additional flexibility can also be achieved by combining CSI reporting configurations with multiple sub-configurations in the A-CSI case (e.g., such as the P-CSI reporting configuration 1000 discussed earlier).

[0148] Figure 15 The discussion assumes the use of an A-CSI reporting configuration that matches P-CSI reporting configuration 1000. Therefore, while the discussion will refer to the elements of P-CSI reporting configuration 1000, it should be understood that this refers to the corresponding A-CSI configuration, which can be configured separately for the UE, or it can be a reuse of P-CSI reporting configuration 1000 by the UE in the case of A-CSI.

[0149] Therefore, the A-CSI reporting configuration can be one of multiple A-CSI reporting configurations that can be used by the UE, and can be selected from multiple A-CSI reporting configurations based on the triggering state present in the DCI.

[0150] Figure 15An example of a DCI format 1500 for triggering A-CSI is illustrated according to one embodiment. The DCI format 1500 may include a CSI request field 1502 indicating the trigger status for A-CSI. For example, it is possible that the trigger status may correspond to... Figure 10 The P-CSI report configuration 1000 matches or is associated with the A-CSI report configuration. Therefore, in this case, the UE will use that specific A-CSI report configuration (instead of another A-CSI report configuration that may exist) to generate the CSI report.

[0151] Furthermore, as illustrated, DCI format 1500 includes a sub-configuration indicator field 1504. As illustrated, the presence of both the CSI request field 1502 and the sub-configuration indicator field 1504 allows the UE to interpret, using conditional interpretation (based on identifying the specific A-CSI reporting configuration using the trigger state information of the CSI request field 1502), that the value or index provided in the sub-configuration indicator field 1504 is one of the sub-configurations 1002 to 1008 for that A-CSI reporting configuration. Therefore, the UE can use one of those indicated in 1002 to 1008 to generate (non-periodic) CSI reports for transmission to the base station.

[0152] Other DCI fields 1506 of DCI format 1500 may include other fields in DCI besides those related to sub-configuration (e.g., fields that exist / have been used in DCI formats X_1 and / or X_2 that may be used in some wireless communication systems, and where DCI format 1500 follows one of these formats / is one of these formats).

[0153] The CRC bit 1508 of DCI format 1500 can be applied to the UE's RNTI at the UE to allow the UE to identify DCI format 1500 as targeting / pointing to the UE.

[0154] Figure 16 A method 1600 for a UE according to one embodiment is illustrated. Method 1600 includes receiving 1602 from a base station a CSI report configuration for providing CSI feedback corresponding to a CC used by the UE, wherein the CSI report configuration lists a plurality of sub-configurations for generating the CSI feedback.

[0155] Method 1600 also includes receiving an indication of the first sub-configuration of 1604 multiple sub-configurations from the base station.

[0156] Method 1600 also includes generating 1606 CSI feedback for CC based on the first sub-configuration.

[0157] Method 1600 also includes sending 1608 CSI feedback for CC to the base station.

[0158] In some implementations of method 1600, the multiple sub-configurations include multiple CSI-RS resource set configurations, wherein each of the multiple CSI-RS resource set configurations is for a different number of CSI-RS ports of CSI-RS resources in the CSI-RS resource set.

[0159] In some embodiments of method 1600, the multiple sub-configurations include multiple codebook configurations. In some of these embodiments, the multiple codebook configurations include one or more of multiple codebook types, multiple antenna panel quantity configurations, multiple antenna array configurations, and multiple CSBR bitmap configurations.

[0160] In some embodiments of method 1600, an indication of a first sub-configuration is received in a MAC CE, the MAC CE including a serving cell ID IE identifying the serving cell corresponding to the CC and a sub-configuration indicator IE identifying the first sub-configuration. In some embodiments of these embodiments, method 1600 further includes receiving an indication of a first sub-configuration at time n+T. proc Then the first sub-configuration is applied, where n is one of the first time slot of the PDSCH containing the MAC CE and the second time slot of the PUCCH containing the HARQ-ACK signaling for the PDSCH, and where T proc The processing time for the first sub-configuration of the application.

[0161] In some embodiments of method 1600, an indication of the first sub-configuration is received in a scheduling DCI format that includes a sub-configuration indicator field identifying the first sub-configuration. In some of these embodiments, the scheduling DCI format also includes a serving cell ID field identifying the serving cell corresponding to the CC.

[0162] In some embodiments of method 1600, an indication of a first sub-configuration is received in a group common DCI format with CRC bits scrambled by a dedicated RNTI for a plurality of UEs including the UE, and the CSI block field of the UE in the group common DCI format corresponding to the CC identifies that the first sub-configuration is for the CC.

[0163] In some embodiments of method 1600, an indication of a first sub-configuration is received in a UE-specific DCI format corresponding to the UE, the DCI format including a serving cell ID field identifying the serving cell corresponding to the CC, a sub-configuration indicator field identifying the first sub-configuration, and a CSBR field.

[0164] In some implementations of method 1600, an indication of a first sub-configuration is received in an A-CSI report that triggers DCI for CSI feedback, the A-CSI report including a sub-configuration indicator field that identifies the first sub-configuration.

[0165] The embodiments contemplated herein include apparatus comprising components for performing one or more elements of method 1600. This apparatus may be, for example, a device of a UE (such as wireless device 2402 as a UE, as described herein).

[0166] The embodiments contemplated herein include one or more non-transitory computer-readable media comprising instructions that, when executed by one or more processors of an electronic device, cause the electronic device to perform one or more elements of method 1600. The non-transitory computer-readable medium may be, for example, the memory of a UE (such as memory 2406 of a wireless device 2402 serving as a UE, as described herein).

[0167] The embodiments contemplated herein include apparatus comprising logic, modules, or circuitry for performing one or more elements of method 1600. This apparatus may be, for example, a UE (such as wireless device 2402 as a UE, as described herein).

[0168] The embodiments contemplated herein include an apparatus comprising: one or more processors and one or more computer-readable media including instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of method 1600. The apparatus may be, for example, a UE (such as a wireless device 2402 as a UE, as described herein).

[0169] The implementation schemes envisioned herein include signals as described or associated with one or more elements of method 1600.

[0170] The embodiments contemplated herein include a computer program or computer program product comprising instructions, wherein execution by a processor causes the processor to perform one or more elements of method 1600. The processor may be a processor of the UE (such as processor 2404 as a wireless device 2402 of the UE, as described herein). These instructions may, for example, reside in the processor of the UE and / or in memory (such as memory 2406 as a wireless device 2402 of the UE, as described herein).

[0171] Figure 17A method 1700 for a base station according to one embodiment is illustrated. Method 1700 includes sending 1702 to a UE for providing CSI report configuration corresponding to CSI feedback used by the UE, wherein the CSI report configuration lists a plurality of sub-configurations for generating CSI feedback.

[0172] Method 1700 also includes sending an indication to the UE of the first of a plurality of sub-configurations 1704.

[0173] Method 1700 also includes sending 1706 CSI-RS corresponding to the first sub-configuration to the UE on the CC.

[0174] Method 1700 also includes receiving 1708 CSI feedback for CC from the UE.

[0175] In some implementations of method 1700, the multiple sub-configurations include multiple CSI-RS resource set configurations, wherein each of the multiple CSI-RS resource set configurations is for a different number of CSI-RS ports of CSI-RS resources in the CSI-RS resource set.

[0176] In some embodiments of method 1700, the multiple sub-configurations include multiple codebook configurations. In some of these embodiments, the multiple codebook configurations include one or more of multiple codebook types, multiple antenna panel quantity configurations, multiple antenna array configurations, and multiple CSBR bitmap configurations.

[0177] In some embodiments of method 1700, an indication of a first sub-configuration is transmitted in a MAC CE, the MAC CE including a serving cell ID IE 1104ID IE identifying the serving cell corresponding to the CC and a sub-configuration indicator IE identifying the first sub-configuration. In some embodiments of these embodiments, method 1700 also includes transmitting a first sub-configuration at time n+T. proc Then the first sub-configuration is applied, where n is one of the first time slot of the PDSCH containing the MAC CE and the second time slot of the PUCCH containing the HARQ-ACK signaling for the PDSCH, and where T proc The processing time for the first sub-configuration of the application.

[0178] In some embodiments of method 1700, an indication of the first sub-configuration is transmitted in a scheduling DCI format that includes a sub-configuration indicator field identifying the first sub-configuration. In some of these embodiments, the scheduling DCI format also includes a serving cell ID field identifying the serving cell corresponding to the CC.

[0179] In some embodiments of method 1700, an indication of a first sub-configuration is transmitted in a group common DCI format with CRC bits scrambled by a dedicated RNTI for a plurality of UEs including the UE, and the CSI block field of the UE in the group common DCI format corresponding to the CC identifies that the first sub-configuration is for the CC.

[0180] In some embodiments of method 1700, an indication of a first sub-configuration is transmitted in a UE-specific DCI format corresponding to the UE, the DCI format including a serving cell ID field identifying the serving cell corresponding to the CC, a sub-configuration indicator field identifying the first sub-configuration, and a CSBR field.

[0181] In some implementations of method 1700, an indication of a first sub-configuration is sent in an A-CSI report that triggers DCI for CSI feedback, the A-CSI report including a sub-configuration indicator field that identifies the first sub-configuration.

[0182] The embodiments contemplated herein include an apparatus comprising components for performing one or more elements of method 1700. This apparatus may be, for example, a base station apparatus (such as network device 2418 as a base station, as described herein).

[0183] The embodiments contemplated herein include one or more non-transitory computer-readable media comprising instructions that, when executed by one or more processors of an electronic device, cause the electronic device to perform one or more elements of method 1700. The non-transitory computer-readable medium may be, for example, the memory of a base station (such as memory 2422 of a network device 2418 serving as a base station, as described herein).

[0184] The embodiments contemplated herein include an apparatus comprising logic, modules, or circuitry for performing one or more elements of method 1700. This apparatus may be, for example, a base station apparatus (such as network device 2418 as a base station, as described herein).

[0185] The embodiments contemplated herein include an apparatus comprising: one or more processors and one or more computer-readable media including instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of method 1700. The apparatus may be, for example, a base station apparatus (such as network device 2418 as a base station, as described herein).

[0186] The implementation scheme envisioned herein includes a signal as described in or related to one or more elements of method 1700.

[0187] The embodiments contemplated herein include a computer program or computer program product comprising instructions, wherein execution by a processing element causes the processing element to perform one or more elements of method 1700. The processor may be a processor of a base station (such as processor 2420 of network device 2418 as a base station, as described herein). These instructions may, for example, reside in the processor and / or on the memory of the base station (such as memory 2422 of network device 2418 as a base station, as described herein).

[0188] In some cases, it may be possible that a non-uniform linear array (NULA) arrangement can provide better performance for CSI feedback processes compared to a uniform linear array (ULA) arrangement. For example, beamforming performance can be improved with a NULA arrangement (e.g., it helps mitigate beam leakage and / or cross-beam interference).

[0189] Therefore, bitmap indicators can be used to indicate a 2-D sparse array pattern for use with configurable / arbitrary number and location of CSI-RS ports (e.g., reduced from the basic case of using all possible CSI-RS antenna ports to reduce network power usage).

[0190] The base station may provide the UE with a CSI-RS port number configuration identifying M CSI-RS ports. The base station may also provide the UE with a panel array configuration for the panel array of M port CSI-RS (e.g., where M = 2 * N1 * N2, where N1 indicates the number of antenna elements in the horizontal direction and N2 indicates the number of antenna elements in the vertical direction). These information items may have been previously provided elsewhere herein (e.g., as part of an indication of one of a plurality of P-CSI configurations for use by the UE, or as part of an indication of a sub-configuration of a CSI configuration for use by the UE (e.g., for P-CSI and / or A-CSI).

[0191] The base station can then provide the UE with an M-bit CSI-RS port bitmap field. Each bit of this field can correspond to a CSI-RS port. These bits can be arranged according to the correspondence between the bits and the CSI-RS port indices they represent (e.g., these bits can be arranged in ascending order of the CSI-RS port indices). It is possible that when position i is set to 0 in the bitmap, this indicates to the UE that the corresponding CSI-RS port (at index i) is off during the associated CSI-RS transmission from the base station. Furthermore, it is possible that when position i is set to 1 in the bitmap, this indicates to the UE that the corresponding CSI-RS port (at index i) is on during the associated CSI-RS transmission from the base station. Therefore, it can be said that the M-bit CSI-RS port bitmap field provides the UE with CSI-RS port configuration.

[0192] The M-bit CSI-RS port bitmap field can be transmitted from the base station to the UE in several possible ways. In some cases, a MAC CE can be used to transmit the M-bit CSI-RS port bitmap field, and this MAC CE is identified based on a dedicated LCID used to convey such an M-bit CSI-RS port bitmap field. The MAC CE may also include a serving cell ID IE, which indicates the identifier of the serving cell to which the M-bit CSI-RS port bitmap is applied.

[0193] In some cases, the M-bit CSI-RS port bitmap field can be transmitted using a unicast scheduling DCI format of the UE incorporating this field. Therefore, the M-bit CSI-RS port bitmap is applied to the serving cell addressed by the scheduling DCI format. It should be noted that this field can be conceived to be added to one or more DCI formats known to the wireless communication system.

[0194] Figure 18 An example of a group common DCI format 1800 for conveying one or more M-bit CSI-RS port bitmap fields is illustrated according to one embodiment. The group common DCI format 1800 enables the communication of M-bit CSI-RS port bitmap fields for multiple CCs and / or one or more UE packets using CCs for a single DCI.

[0195] Group Common DCI Format 1800 may include multiple M-bit CSI-RS port bitmap fields (e.g., in...) Figure 5 (These are labeled "Bitmap #1" through "Bitmap #n"). Each such M-bit CSI-RS port bitmap field may include a CSI-RS port bitmap.

[0196] One or more fields in the M-bit CSI-RS port bitmap field can be understood as being specific to a particular UE. For example, as illustrated, the first M-bit CSI-RS port bitmap field 1806 (including "Bitmap #1" through "Bitmap #4") of the group common DCI format 1800 is for the first UE 1802, while the additional M-bit CSI-RS port bitmap field 1808 is instead intended for subsequent / other UEs 1804.

[0197] For a given UE, the position of the M-bit CSI-RS port bitmap field of the serving cell / CC used by the UE is first provided by higher-layer signaling from the base station to the UE using the parameter “startingBitOfFormatX”. Upon receiving Group Common DCI Format 1800, the UE can identify the corresponding position of one or more fields in its M-bit CSI-RS port bitmap field for that specific serving cell / CC based on the “startingBitOfFormatX” for that particular serving cell / CC.

[0198] When a UE is configured with multiple CCs (e.g., under the CA protocol), multiple M-bit CSI-RS port bitmap fields for the same UE can be used. For example, it is possible that the UE is configured with CCs #1 through #4. In this case, each field in the multiple M-bit CSI-RS port bitmap fields for the UE included in the group common DCI format can be for one of the CCs used by the UE. For example, in group common DCI format 1800, by way of example, the "Bitmap #1" field can provide the CSI-RS port configuration for CC #1, the "Bitmap #2" field can provide the CSI-RS port configuration for CC #2, the "Bitmap #3" field can provide the CSI-RS port configuration for CC #3, and the "Bitmap #4" field can provide the CSI-RS port configuration for CC #4.

[0199] It should be noted that each field in the M-bit CSI-RS port bitmap field may have a different size to correspond to the number M of CSI-RS ports configured for that particular CC at that particular UE.

[0200] The CRC bit 1810 of the group common DCI format 1800 can be scrambled so that one or more UEs with an appropriate RNTI (e.g., Z-RNTI) can identify that the group common DCI format 1800 is for that UE, and thus can include one or more M-bit CSI-RS port bitmap fields for that UE. The RNTI can be configured to the UE via higher-layer signaling from the base station.

[0201] Once the M-bit CSI-RS port bitmap field (e.g., for a specific CC) has been conveyed to the UE, this field can be used at the UE to derive channel measurements for CSI parameters (e.g., rank indicator (RI), precoding matrix indicator (PMI), and / or channel quality indicator (CQI), etc.). In this case, the UE can set the channel response for the CSI-RS ports with i = 0 in the M-bit CSI-RS port bitmap field to zero (e.g., the UE does not use these CSI-RS ports when performing channel measurements). Thus, the UE will effectively only consider the CSI-RS ports with i = 1 in the M-bit CSI-RS port bitmap when performing channel measurements.

[0202] Note that the UE can still use the M-port codebook to calculate measurements of the received CSI-RS. By using the M-port codebook (e.g., rather than using a simplified codebook that matches the number of bits i = 1 in the CSI-RS port bitmap field), it is possible that beam leakage and / or cross-beam interference issues can be reduced.

[0203] Figure 19 An antenna panel 1900 non-uniform linear array (NULA) arrangement for a CSI feedback process according to one embodiment is illustrated. Antenna panel 1900 uses M = 32, where N1 = 8 and N2 = 2 (and note that Figure 19 the view of antenna panel 1900 in

[0204] is rotated 90 degrees). <1200001>1000011001100000011000000>The M-bit CSI-RS port bitmap 1902 (where M = 32) of

[0205] Figure 20 has been signaled to the UE and applied to the CSI-RS ports 1904 according to their increasing indices, as illustrated. Thus, antenna panel 1900 uses the active CSI-RS ports 1906 as indicated to the UE for CSI-RS transmission, and the UE considers the active CSI-RS ports 1906 when performing channel measurements. Figure 20

[0206] Antenna panel 2000 corresponds to the use of a 2D sparse array representing a parallel nested array (PNA) arrangement.<1111111>1000000111111111100000011>The M-bit CSI-RS port bitmap 2002 (where M = 32) has been signaled to the UE and is applied to CSI-RS ports 2004 according to their increasing indices, as illustrated. Thus, the antenna panel 2000 uses the active CSI-RS ports 2006 as indicated to the UE for CSI-RS, and the UE considers the active CSI-RS ports 2006 when performing channel measurements.

[0207] Figure 21 Method 2100 of a UE according to one embodiment is illustrated. Method 2100 includes receiving 2102 from a base station a CSI-RS port number configuration identifying M CSI-RS ports and a panel array configuration for a panel array of M-port CSI-RS.

[0208] Method 2100 further includes receiving 2104 from the base station a CSI-RS port bitmap of length M, which indicates the active CSI-RS ports among the CSI-RS ports.

[0209] Method 2100 further includes performing 2106 channel measurements using the active CSI-RS ports and an M-port CSI feedback codebook.

[0210] Method 2100 further includes reporting 2108 the results of the channel measurements to the base station.

[0211] In some embodiments of method 2100, the channel measurement includes calculating one of RI, PMI, and CQI.

[0212] In some embodiments of method 2100, the active CSI-RS ports correspond to one or more of a PNA configuration relative to the panel array and a PCA configuration relative to the panel array.

[0213] In some embodiments of method 2100, the CSI-RS port bitmap is received in a MAC CE identified by a dedicated LCID indicating that the MAC CE contains the CSI-RS port bitmap.

[0214] In some embodiments of method 2100, the CSI-RS port bitmap is received in a unicast scheduling DCI format for the UE.

[0215] In some embodiments of method 2100, a CSI-RS port bitmap is received for a group common DCI format including a UE. In some of these embodiments, the CSI-RS port bitmap is one of a plurality of CSI-RS port bitmaps used by the UE in a group common DCI format, wherein the plurality of CSI-RS port bitmaps correspond to a plurality of CCs used by the UE.

[0216] The embodiments contemplated herein include apparatus comprising components for performing one or more elements of method 2100. This apparatus may be, for example, a device of a UE (such as wireless device 2402 as a UE, as described herein).

[0217] The embodiments contemplated herein include one or more non-transitory computer-readable media comprising instructions that, when executed by one or more processors of an electronic device, cause the electronic device to perform one or more elements of method 2100. The non-transitory computer-readable medium may be, for example, the memory of a UE (such as memory 2406 of a wireless device 2402 serving as a UE, as described herein).

[0218] The embodiments contemplated herein include apparatus comprising logic, modules, or circuitry for performing one or more elements of method 2100. This apparatus may be, for example, a UE (such as wireless device 2402 as a UE, as described herein).

[0219] The embodiments contemplated herein include an apparatus comprising one or more processors and one or more computer-readable media including instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of method 2100. The apparatus may be, for example, a UE (such as a wireless device 2402 as a UE, as described herein).

[0220] The implementation schemes envisioned herein include signals as described or associated with one or more elements of method 2100.

[0221] The embodiments contemplated herein include a computer program or computer program product having instructions, wherein, when executed by a processor, the program causes the processor to perform one or more elements of method 2100. The processor may be a processor of the UE (such as processor 2404 as a wireless device 2402 of the UE, as described herein). These instructions may, for example, reside in the processor of the UE and / or in memory (such as memory 2406 as a wireless device 2402 of the UE, as described herein).

[0222] Figure 22A method 2200 for a base station according to an embodiment is illustrated. Method 2200 includes sending 2202 to the UE a CSI-RS port number configuration identifying M CSI-RS ports and a panel array configuration for the panel array of M port CSI-RS.

[0223] Method 2200 further includes sending a CSI-RS port bitmap of length M to the UE, the CSI-RS port bitmap indicating the active CSI-RS ports in the CSI-RS ports.

[0224] Method 2200 also includes sending 2206CSI-RS to the UE using the active CSI-RS port.

[0225] Method 2200 also includes receiving a report from the UE 2208 of the results of channel measurements at the UE using the active CSI-RS port and M port CSI feedback codebook.

[0226] In some implementations of method 2200, channel measurement includes calculating one of RI, PMI, and CQI.

[0227] In some embodiments of method 2200, the active CSI-RS port corresponds to one or more of a PNA configuration relative to the panel array and a PCA configuration relative to the panel array.

[0228] In some embodiments of method 2200, the CSI-RS port bitmap is transmitted in a MAC CE identified by a dedicated LCID that indicates the MAC CE to contain a CSI-RS port bitmap.

[0229] In some implementations of method 2200, the CSI-RS port bitmap is transmitted in a unicast scheduling DCI format for the UE.

[0230] In some embodiments of method 2200, a CSI-RS port bitmap is transmitted for a group common DCI format including a UE. In some of these embodiments, the CSI-RS port bitmap is one of a plurality of CSI-RS port bitmaps used by the UE in a group common DCI format, wherein the plurality of CSI-RS port bitmaps correspond to a plurality of CCs used by the UE.

[0231] The embodiments contemplated herein include an apparatus comprising components for performing one or more elements of method 2200. This apparatus may be, for example, a base station apparatus (such as network device 2418 as a base station, as described herein).

[0232] The embodiments contemplated herein include one or more non-transitory computer-readable media comprising instructions that, when executed by one or more processors of an electronic device, cause the electronic device to perform one or more elements of method 2200. The non-transitory computer-readable medium may be, for example, the memory of a base station (such as memory 2422 of a network device 2418 serving as a base station, as described herein).

[0233] The embodiments contemplated herein include apparatus comprising logic, modules, or circuitry for performing one or more elements of method 2200. This apparatus may be, for example, a base station apparatus (such as network device 2418 as a base station, as described herein).

[0234] The embodiments contemplated herein include an apparatus comprising: one or more processors and one or more computer-readable media including instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of method 2200. The apparatus may be, for example, a base station apparatus (such as network device 2418 as a base station, as described herein).

[0235] The implementation schemes envisioned herein include signals as described or associated with one or more elements of method 2200.

[0236] The embodiments contemplated herein include a computer program or computer program product comprising instructions, wherein execution by a processing element causes the processing element to perform one or more elements of method 2200. The processor may be a processor of a base station (such as processor 2420 of network device 2418 as a base station, as described herein). These instructions may, for example, reside in the processor and / or on the memory of the base station (such as memory 2422 of network device 2418 as a base station, as described herein).

[0237] Figure 23 An example architecture of a wireless communication system 2300 according to an embodiment disclosed herein is illustrated. The following description is for an example wireless communication system 2300 operating in conjunction with LTE system standards and / or 5G or NR system standards provided by 3GPP technical specifications.

[0238] like Figure 23 As shown, the wireless communication system 2300 includes UE 2302 and UE 2304 (but any number of UEs may be used). In this example, UE 2302 and UE 2304 are exemplified as smartphones (e.g., handheld touchscreen mobile computing devices capable of connecting to one or more cellular networks), but may also include any mobile or non-mobile computing device configured for wireless communication.

[0239] UE 2302 and UE 2304 can be configured to be communicatively coupled to RAN 2306. In an implementation, RAN 2306 may be NG-RAN, E-UTRAN, etc. UE 2302 and UE 2304 utilize connections (or channels) with RAN 2306 (shown as connection 2308 and connection 2310, respectively), where each connection (or channel) includes a physical communication interface. RAN 2306 may include one or more base stations, such as base station 2312 and base station 2314, that implement connection 2308 and connection 2310.

[0240] In this example, connection 2308 and connection 2310 are air interfaces that implement such communication coupling and can conform to the RAT used by RAN 2306, such as LTE and / or NR, for example.

[0241] In some implementations, UE 2302 and UE 2304 may also exchange communication data directly via sidelink interface 2316. UE 2304 is shown configured to access an access point (shown as AP 2318) via connection 2320. By way of example, connection 2320 may include a local wireless connection, such as a connection conforming to any IEEE 802.11 protocol, wherein AP 2318 may include... Router. In this example, AP 2318 can connect to another network (e.g., the Internet) without going through CN 2324.

[0242] In the implementation, UE 2302 and UE 2304 may be configured to communicate with each other or with base station 2312 and / or base station 2314 on a multi-carrier communication channel using orthogonal frequency division multiplexing (OFDM) communication signals according to various communication technologies, such as but not limited to orthogonal frequency division multiple access (OFDMA) communication technology (e.g., for downlink communication) or single-carrier frequency division multiple access (SC-FDMA) communication technology (e.g., for uplink and ProSe or sidelink communication)). However, the scope of the implementation is not limited in this respect. The OFDM signal may include multiple orthogonal subcarriers.

[0243] In some implementations, all or part of base station 2312 or base station 2314 may be implemented as one or more software entities running on a server computer as part of a virtual network. Furthermore, or in other implementations, base station 2312 or base station 2314 may be configured to communicate with each other via interface 2322. In implementations where wireless communication system 2300 is an LTE system (e.g., when CN 2324 is an EPC), interface 2322 may be an X2 interface. This X2 interface may be defined between two or more base stations (e.g., two or more eNBs, etc.) connected to the EPC and / or between two eNBs connected to the EPC. In implementations where wireless communication system 2300 is an NR system (e.g., when CN 2324 is a 5GC), interface 2322 may be an Xn interface. This Xn interface is defined between two or more base stations (e.g., two or more gNBs, etc.) connected to the 5GC, between base station 2312 (e.g., gNB) connected to the 5GC and the eNB, and / or between two eNBs connected to the 5GC (e.g., CN 2324).

[0244] RAN 2306 is shown communicatively coupled to CN 2324. CN 2324 may include one or more network elements 2326 configured to provide various data and telecommunications services to customers / subscribers (e.g., users of UE 2302 and UE 2304) connected to CN 2324 via RAN 2306. Components of CN 2324 may be implemented in a single physical device or a separate physical device, including components for reading and executing instructions from machine-readable or computer-readable media (e.g., non-transitory machine-readable storage media).

[0245] In the implementation scheme, CN 2324 may be an EPC, and RAN 2306 may be connected to CN 2324 via S1 interface 2328. In the implementation scheme, S1 interface 2328 may be divided into two parts: an S1 user plane (S1-U) interface, which carries service data between base station 2312 or base station 2314 and the serving gateway (S-GW); and an S1-MME interface, which is the signaling interface between base station 2312 or base station 2314 and the mobility management entity (MME).

[0246] In the implementation scheme, CN 2324 may be a 5GC, and RAN 2306 may be connected to CN 2324 via NG interface 2328. In the implementation scheme, NG interface 2328 may be divided into two parts: an NG user plane (NG-U) interface, which carries service data between base station 2312 or base station 2314 and user plane function (UPF); and an S1 control plane (NG-C) interface, which is the signaling interface between base station 2312 or base station 2314 and access and mobility management function (AMF).

[0247] Generally, application server 2330 can be an element that provides Internet Protocol (IP) bearer resources (e.g., packet-switched data services) for use with CN 2324. Application server 2330 can also be configured to support one or more communication services (e.g., VoIP sessions, group communication sessions, etc.) for UE 2302 and UE 2304 via CN 2324. Application server 2330 can communicate with CN 2324 via IP communication interface 2332.

[0248] Figure 24 A system 2400 for performing signaling 2434 between a wireless device 2402 and a network device 2418 according to an embodiment disclosed herein is illustrated. System 2400 may be part of a wireless communication system as described herein. Wireless device 2402 may be, for example, a UE (User Equipment) of a wireless communication system. Network device 2418 may be, for example, a base station (e.g., an eNB or gNB) of a wireless communication system.

[0249] Wireless device 2402 may include one or more processors 2404. Processor 2404 may execute instructions to cause various operations of wireless device 2402 to be performed, as described herein. Processor 2404 may include one or more baseband processors, which may be implemented using, for example, a central processing unit (CPU), digital signal processor (DSP), application-specific integrated circuit (ASIC), controller, field-programmable gate array (FPGA) device, another hardware device, firmware device, or any combination thereof configured to perform the operations described herein.

[0250] Wireless device 2402 may include memory 2406. Memory 2406 may be a non-transitory computer-readable storage medium that stores instructions 2408 (which may include, for example, instructions executed by processor 2404). Instructions 2408 may also be referred to as program code or computer program. Memory 2406 may also store data used by processor 2404 and results calculated by the processor.

[0251] Wireless device 2402 may include one or more transceivers 2410, which may include radio frequency (RF) transmitter and / or receiver circuitry that uses antenna 2412 of wireless device 2402 to facilitate the transmission or reception of signaling (e.g., signaling 2434) between wireless device 2402 and other devices (e.g., network device 2418) according to a corresponding RAT.

[0252] Wireless device 2402 may include one or more antennas 2412 (e.g., one, two, four or more). In embodiments with multiple antennas 2412, wireless device 2402 can fully utilize the spatial diversity of such multiple antennas 2412 to transmit and / or receive multiple different data streams on the same time-frequency resources. This behavior can be referred to as, for example, multiple-input multiple-output (MIMO) behavior (referring to multiple antennas used at each of the transmitting and receiving devices to implement this aspect). MIMO transmission by wireless device 2402 can be implemented according to precoding (or digital beamforming) applied to wireless device 2402, which multiplexes the data streams among antennas 2412 based on known or assumed channel characteristics, such that each data stream is received with appropriate signal strength relative to the other streams and at a desired location in the spatial domain (e.g., the location of the receiver associated with that data stream). Some implementations may use a single-user MIMO (SU-MIMO) approach (where all data streams are directed to a single receiver) and / or a multi-user MIMO (MU-MIMO) approach (where individual data streams may be directed to individual (different) receivers at different locations in the airspace).

[0253] In some implementations with multiple antennas, the wireless device 2402 can implement analog beamforming technology, whereby the phase of the signal transmitted by the antenna 2412 is relatively adjusted, making the (joint) transmission of the antenna 2412 directional (this is sometimes referred to as beam control).

[0254] Wireless device 2402 may include one or more interfaces 2414. Interfaces 2414 can be used to provide input to or from wireless device 2402. For example, wireless device 2402 as a UE may include interfaces 2414, such as microphones, speakers, touchscreens, buttons, etc., to allow users of the UE to input to and / or output to the UE. Other interfaces of such a UE may consist of transmitters, receivers, and other circuitry (e.g., other than the transceiver 2410 / antenna 2412 already described) that allow communication between the UE and other devices, and may be based on known protocols (e.g., (etc.) to perform the operation.

[0255] Wireless device 2402 may include CSI module 2416. CSI module 2416 may be implemented via hardware, software, or a combination thereof. For example, CSI module 2416 may be implemented as a processor, circuitry, and / or instructions 2408 stored in memory 2406 and executed by processor 2404. In some examples, CSI module 2416 may be integrated within processor 2404 and / or transceiver 2410. For example, CSI module 2416 may be implemented via a combination of software components (e.g., executed by a DSP or general-purpose processor) and hardware components (e.g., logic gates and circuitry) within processor 2404 or transceiver 2410.

[0256] The CSI module 2416 can be used in various aspects of this disclosure, for example, Figures 1 to 22 All aspects. The CSI module 2416 can be configured, among other things, to apply and use the P-CSI report configuration from the base station, apply and use the CSI report sub-configuration from the base station, and / or apply and use the M-bit CSI-RS port bitmap from the base station in the manner described herein.

[0257] Network device 2418 may include one or more processors 2420. Processor 2420 is executable instructions that cause network device 2418 to perform various operations as described herein. Processor 2420 may include one or more baseband processors, which are implemented using, for example, a CPU, DSP, ASIC, controller, FPGA device, another hardware device, firmware device, or any combination thereof configured to perform the operations described herein.

[0258] Network device 2418 may include memory 2422. Memory 2422 may be a non-transitory computer-readable storage medium that stores instructions 2424 (which may include, for example, instructions executed by processor 2420). Instructions 2424 may also be referred to as program code or computer program. Memory 2422 may also store data used by processor 2420 and results calculated by the processor.

[0259] Network device 2418 may include one or more transceivers 2426, which may include RF transmitter circuitry and / or receiver circuitry that use the antenna 2428 of network device 2418 to facilitate the transmission or receipt of signaling (e.g., signaling 2434) between network device 2418 and other devices (e.g., wireless device 2402) in accordance with the corresponding RAT.

[0260] Network device 2418 may include one or more antennas 2428 (e.g., one, two, four or more). In embodiments with multiple antennas 2428, network device 2418 may perform MIMO, digital beamforming, analog beamforming, beam control, etc., as described above.

[0261] Network device 2418 may include one or more interfaces 2430. Interfaces 2430 may be used to provide input to or output to network device 2418. For example, network device 2418 as a base station may include interfaces 2430 consisting of transmitters, receivers, and other circuitry (e.g., in addition to the transceiver 2426 / antenna 2428 already described), which enable the base station to communicate with other equipment in the core network and / or enable the base station to communicate with external networks, computers, databases, etc., for the purpose of performing operations, management, and maintenance of the base station or other equipment operatively connected to the base station.

[0262] Network device 2418 may include CSI module 2432. CSI module 2432 may be implemented via hardware, software, or a combination thereof. For example, CSI module 2432 may be implemented as a processor, circuitry, and / or instructions 2424 stored in memory 2422 and executed by processor 2420. In some examples, CSI module 2432 may be integrated within processor 2420 and / or transceiver 2426. For example, CSI module 2432 may be implemented by a combination of software components (e.g., executed by a DSP or general-purpose processor) and hardware components (e.g., logic gates and circuitry) within processor 2420 or transceiver 2426.

[0263] The CSI module 2432 can be used in various aspects of this disclosure, for example, Figures 1 to 22 In all aspects. The CSI module 2432 is configured, among other things, to generate a set of P-CSI report configurations and transmit them to the UE in the manner described herein, to indicate a specific P-CSI report configuration to the UE, to generate a CSI report configuration with multiple sub-configurations and transmit it to the UE, to indicate a specific CSI report sub-configuration to the UE, and / or to generate and indicate to the UE an M-bit CSI-RS port bitmap corresponding to the CSI-RS to be transmitted.

[0264] For one or more embodiments, at least one of the components set forth in one or more of the foregoing figures may be configured to perform one or more operations, techniques, processes, and / or methods as described herein. For example, a baseband processor as described herein in conjunction with one or more of the foregoing figures may be configured to operate according to one or more of the examples set forth herein. Similarly, circuitry associated with a UE, base station, network element, etc., as described above in conjunction with one or more of the foregoing figures may be configured to operate according to one or more of the examples set forth herein.

[0265] Unless otherwise expressly stated, any of the above embodiments may be combined with any other embodiment (or combination of embodiments). The foregoing description of one or more specific embodiments provides illustration and description, but is not intended to be exhaustive or to limit the scope of the embodiments to the precise form disclosed. In view of the foregoing teachings, modifications and variations are possible, or modifications and variations may be derived from practice of various embodiments.

[0266] Implementations and specific embodiments of the systems and methods described herein may include various operations embodied in machine-executable instructions to be executed by a computer system. The computer system may include one or more general-purpose or special-purpose computers (or other electronic devices). The computer system may include hardware components that include specific logic for performing the operations; or it may include a combination of hardware, software, and / or firmware.

[0267] It should be recognized that the systems described herein include descriptions of specific implementations. These implementations may be combined into a single system, partially integrated into other systems, divided into multiple systems, or otherwise partitioned or combined. Furthermore, it is conceivable to use parameters, attributes, aspects, etc., of one implementation in one implementation. For clarity, these parameters, attributes, aspects, etc., are described only in one or more implementations, and it should be recognized that, unless expressly stated herein, these parameters, attributes, aspects, etc., may be combined with or replace parameters, attributes, aspects, etc., of another implementation.

[0268] As is widely recognized, the use of personally identifiable information should comply with privacy policies and practices that are generally accepted to meet or exceed industry or governmental requirements for protecting user privacy. Specifically, personally identifiable information data should be managed and processed to minimize the risk of unintentional or unauthorized access or use, and the nature of authorized use should be clearly explained to users.

[0269] Although the foregoing has been described in considerable detail for clarity, it will be apparent that certain changes and modifications can be made without departing from the principles of the invention. It should be noted that many alternative ways exist to implement both the processes and apparatus described herein. Therefore, embodiments of the invention should be considered illustrative rather than restrictive, and this specification is not limited to the details given herein, but can be modified within the scope and equivalents of the appended claims.

Claims

1. A method of a user equipment (UE), the method include: receiving, from a base station, a plurality of periodic channel state information (P-CSI) reporting configurations for providing channel state information (CSI) feedback for component carriers (CCs) used by the UE; receiving, from the base station, an indication of a first P-CSI reporting configuration among the plurality of P-CSI reporting configurations for the CC; generating the CSI feedback for the CC according to the first P-CSI reporting configuration; as well as and sending the CSI feedback for the CC to the base station.

2. The method of claim 1 , wherein the plurality of P-CSI reporting configurations comprises a plurality of channel state information reference signal (CSI-RS) resource set configurations, wherein each of the plurality of CSI-RS resource set configurations is for a different number of CSI-RS ports of a CSI-RS resource in a CSI-RS resource set.

3. The method of claim 1 , wherein the plurality of P-CSI reporting configurations comprises one or more of: Multiple antenna panel quantity configurations; multiple antenna array configurations; Multiple codebook subset restriction (CSBR) bitmap configurations; Multiple reporting periodicity configurations; and Multiple frequency granularity configurations.

4. The method of claim 1 , wherein the indication of the first P-CSI reporting configuration is received in a medium access control element (MAC CE), the MAC CE comprising a serving cell identifier (ID) information element (IE) identifying a serving cell corresponding to the CC and a P-CSI ID IE identifying the first P-CSI reporting configuration.

5. The method according to claim 4, further comprising: proc The first P-CSI reporting configuration is then applied, wherein n is one of a first time slot of a physical downlink shared channel (PDSCH) containing the MAC CE and a second time slot of a physical uplink control channel (PUCCH) containing hybrid automatic repeat request acknowledgement (HARQ-ACK) signaling for the PDSCH, and wherein T proc A processing time for applying the first P-CSI report configuration.

6. The method of claim 1, wherein the indication of the first P-CSI reporting configuration is received in a scheduling downlink control information (DCI) format, the scheduling DCI format including a P-CSI ID field identifying the first P-CSI reporting configuration. 7 . The method of claim 6 , wherein the scheduling DCI format further comprises a serving cell identifier (ID) field identifying a serving cell corresponding to the CC.

8. The method according to claim 1, in: the indication of the first P-CSI reporting configuration is received in a group common downlink control information (DCI) format with cyclic redundancy check (CRC) bits, the CRC bits being scrambled with dedicated radio network temporary identifiers (RNTIs) of a plurality of UEs including the UE; and The CSI block field of the UE in the set common DCI format corresponding to the CC identifies that the first sub-configuration is for the CC.

9. The method of claim 1 , wherein the indication of the first P-CSI reporting configuration is received in a UE-specific downlink control information (DCI) format corresponding to the UE, the UE-specific DCI format include: a serving cell identifier (ID) field, the serving cell ID field identifying a serving cell corresponding to the CC; A P-CSI field, where the P-CSI field identifies the first P-CSI reporting configuration; and Codebook Subset Restriction (CSBR) field.

10. A method of a user equipment (UE), the method include: receiving, from a base station, a channel state information (CSI) reporting configuration for providing CSI feedback for a component carrier (CC) used by the UE; in The CSI reporting configuration lists a plurality of sub-configurations for generating the CSI feedback; receiving, from the base station, an indication of a first subconfiguration of the plurality of subconfigurations; generating the CSI feedback for the CC according to the first sub-configuration; as well as and sending the CSI feedback for the CC to the base station.

11. The method of claim 10, wherein the plurality of sub-configurations comprise a plurality of channel state information reference signal (CSI-RS) resource set configurations, wherein each of the plurality of CSI-RS resource set configurations is for a different number of CSI-RS ports of a CSI-RS resource in a CSI-RS resource set. The method of claim 10 , wherein the plurality of sub-configurations comprises a plurality of codebook configurations.

13. The method of claim 12, wherein the plurality of codebook configurations comprises one or more of: Multiple codebook types; Multiple antenna panel quantity configurations; multiple antenna array configurations; and Multiple codebook subset restriction (CSBR) bitmap configurations.

14. The method of claim 10, wherein the indication of the first subconfiguration is received in a medium access control element (MAC CE), the MAC CE comprising a serving cell identifier (ID) information element (IE) identifying a serving cell corresponding to the CC and a subconfiguration indicator IE identifying the first subconfiguration.

15. The method according to claim 14, further comprising at time n+T proc The first sub-configuration is then applied, wherein n is one of a first time slot of a physical downlink shared channel (PDSCH) containing the MAC CE and a second time slot of a physical uplink control channel (PUCCH) containing hybrid automatic repeat request acknowledgement (HARQ-ACK) signaling for the PDSCH, and wherein T proc The processing time for applying the first sub-configuration.

16. The method of claim 10, wherein the indication of the first subconfiguration is received in a scheduling downlink control information (DCI) format, the scheduling DCI format including a subconfiguration indicator field identifying the first subconfiguration.

17. The method of claim 16, wherein the scheduling DCI format further comprises a serving cell identifier (ID) field identifying a serving cell corresponding to the CC.

18. The method according to claim 10, in: The indication of the first sub-configuration is received in a group common downlink control information (DCI) format with cyclic redundancy check (CRC) bits, the CRC bits being scrambled with dedicated radio network temporary identifiers (RNTIs) of a plurality of UEs including the UE; and The CSI block field of the UE in the set common DCI format corresponding to the CC identifies that the first sub-configuration is for the CC.

19. The method of claim 10, wherein the indication of the first sub-configuration is received in a UE-specific downlink control information (DCI) format corresponding to the UE, the UE-specific DCI format include: a serving cell identifier (ID) field, the serving cell ID field identifying a serving cell corresponding to the CC; a subconfiguration indicator field identifying the first subconfiguration; and Codebook Subset Restriction (CSBR) field.

20. The method of claim 10, wherein the indication of the first subconfiguration is received in an aperiodic CSI (A-CSI) report that triggers downlink control information (DCI) for the CSI feedback, the aperiodic CSI report comprising a subconfiguration indicator field identifying the first subconfiguration.

21. A method of a user equipment (UE), the method include: receiving, from a base station, a channel state information reference signal (CSI-RS) port number configuration identifying M CSI-RS ports and a panel array configuration for a panel array of the M-port CSI-RS; receiving a CSI-RS port bitmap of length M from the base station, the CSI-RS port bitmap indicating active CSI-RS ports among the CSI-RS ports; Perform channel measurement using the active CSI-RS port and the M-port CSI feedback codebook; as well as The channel measurement result is reported to the base station.

22. The method of claim 21, wherein the channel measurement comprises calculating one of a rank indicator (RI), a precoding matrix indicator (PMI), and a channel quality index (CQI).

23. The method of claim 21, wherein the active CSI-RS ports correspond to one or more of a parallel nested array (PNA) configuration relative to the panel array and a parallel coprime array (PCA) configuration relative to the panel array.

24. The method of claim 21, wherein the CSI-RS port bitmap is received in a medium access control element (MAC CE) identified by a dedicated logical channel identifier (LCID), the LCID indicating that the MAC CE contains the CSI-RS port bitmap.

25. The method of claim 21, wherein the CSI-RS port bitmap is received in a unicast scheduled downlink control information (DCI) format for the UE.

26. The method of claim 21, wherein the CSI-RS port bitmap is received in a group common downlink control information (DCI) format for a plurality of UEs including the UE.

27. The method of claim 26, wherein the CSI-RS port bitmap is one of a plurality of CSI-RS port bitmaps used by the UE in the group common DCI format, wherein the plurality of CSI-RS port bitmaps correspond to a plurality of component carriers (CCs) used by the UE.

28. An apparatus comprising means for performing the method according to any one of claims 1 to 27.

29. A computer-readable medium comprising instructions, which, when executed by one or more processors of an electronic device, cause the electronic device to perform the method according to any one of claims 1 to 27.

30. An apparatus comprising logic, modules or circuits operable to perform the method of any one of claims 1 to 27.

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