Dynamic interference measurement for multi-TRP CSI

Abstract

Certain aspects of the present disclosure provide techniques for channel state information (CSI) for multiple transmit receive point (mTRP) scenarios. The techniques may provide dynamic interference measurement for mTRP CSI. A method that may be performed by a user equipment (UE) includes receiving a CSI reporting configuration that configures the UE with multiple CSI reference signal (CSI-RS) resources (CMRs) for channel measurement and multiple resources (IMRs) for interference measurement. The method includes determining an indicator based on an association between one or more CMRs and one or more IMRs. The code point of the indicator is associated with the IMR or IMR set in the order in which the IMR or IMR set is in the configuration, and is associated with a portion of a CMR, a CMR pair, or a port of a CMR. The method generally includes performing CSI measurements based on the association.

Description

Technical Field

[0001] Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for dynamic interference measurement of multiple transmit receive point (mTRP) channel state information (CSI). Background Art

[0002] Wireless communication systems are widely deployed to provide a variety of telecommunication services such as telephony, video, data, messaging, broadcasts, and the like. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access systems include Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, to name a few.

[0003] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city level, a national level, a regional level, and even a global level. New Radio (e.g., 5G NR) is an example of an emerging telecommunication standard. NR is an enhancement set of the LTE mobile standard released by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectral efficiency, reducing costs, improving services, utilizing new spectrum, and better integrating with other open standards using OFDMA with cyclic prefix (CP) on the downlink (DL) and uplink (UL). To this end, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0004] However, as demand for mobile broadband access continues to increase, there is a need for further improvements to NR and LTE technologies. Ideally, these improvements should be applicable to other multi-access technologies and the telecommunication standards that employ them. Summary of the Invention

[0005] The systems, methods, and apparatus of the present disclosure each have several aspects, no single one of which is solely responsible for its desired properties. Without limiting the scope of the present disclosure as expressed by the appended claims, some features will now be briefly discussed. After considering this discussion, and particularly after reading the section entitled "Detailed Description," a skilled artisan will understand how the features of the present disclosure provide advantages including improved dynamic interference measurement for multiple transmit receive point (mTRP) channel state information (CSI).

[0006] Certain aspects of the subject matter described in the present disclosure may be implemented in a method for wireless communication by a user equipment (UE). The method generally includes receiving a CSI reporting configuration that configures the UE with multiple CSI reference signal (CSI-RS) resources (CMRs) for channel measurement and multiple resources (IMRs) for interference measurement. The method generally includes determining an indicator based on an association between one or more CMRs and one or more IMRs. The code points of the indicator are associated with the IMRs or the IMR sets in an order in which the IMRs or IMR sets are in the configuration. The code points of the indicator are associated with a CMR, a CMR pair, or a portion of a port of a CMR. The method generally includes performing CSI measurements based on the association.

[0007] Certain aspects of the subject matter described in this disclosure may be implemented in a method for wireless communications by a UE. The method generally includes receiving a CSI reporting configuration that configures the UE with multiple CMRs. The method generally includes determining an indicator, wherein a codepoint of the indicator is associated with a CMR, a pair of CMRs, a port group of CMRs, or two port groups of CMRs. The method generally includes determining the association between the codepoint and the CMR, CMR pair, CMR port group, or two port groups of CMRs based on a network configuration or by means of a rule based on the number of CMRs or the number of port groups in the CMRs. The method generally includes performing CSI measurements based on the association. The method generally includes reporting a codepoint of the indicator indicating a selected CMR, CMR pair, CMR port group, or two port groups of CMRs.

[0008] Certain aspects of the subject matter described in this disclosure may be implemented in a method for wireless communication by a base station (BS). The method generally includes configuring a UE with a CSI reporting configuration, wherein the CSI reporting configuration configures the UE with multiple CMRs and multiple IMRs. The method generally includes determining an indicator based on an association between one or more CMRs and one or more IMRs. The code points of the indicator are associated with the IMRs or IMR sets in the order in which the IMRs or IMR sets are in the configuration and are associated with a CMR, a CMR pair, or a portion of a port of a CMR. The method generally includes receiving a CSI report based on the association.

[0009] Certain aspects of the subject matter described in this disclosure may be implemented in a method for wireless communication by a base station. The method generally includes configuring a UE with a CSI reporting configuration, wherein the CSI reporting configuration configures the UE with multiple CMRs. The method generally includes determining an indicator. A code point of the indicator is associated with a CMR, a pair of CMRs, a port group of CMRs, or two port groups of CMRs. The method generally includes determining the association between the code point and the CMR, CMR pair, CMR port group, or two port groups of CMRs. The association is configured at the UE or is based on the number of CMRs or the number of port groups in the CMRs by means of a rule. The method generally includes receiving a CSI report based on the association. The method generally includes receiving a code point of the indicator indicating a selected CMR, CMR pair, CMR port group, or two port groups of CMRs.

[0010] Aspects of the present disclosure provide units, devices, processors, and computer-readable media for performing the methods described herein.

[0011] To accomplish the foregoing and related ends, one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of one or more aspects. However, these features are indicative of but a few of the various ways in which the basic principles of the various aspects may be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order that the manner in which the above-recited features of the present disclosure may be understood in detail, a more particular description, briefly summarized above, may be given by reference to various aspects, some of which are illustrated in the accompanying drawings. It should be noted, however, that the drawings illustrate only certain typical aspects of the present disclosure and are not therefore to be considered as limiting the scope of the invention, as the description may admit of other equally effective aspects.

[0013] Figure 1is a block diagram conceptually illustrating an example telecommunications system in accordance with certain aspects of the present disclosure.

[0014] Figure 2 is a block diagram conceptually illustrating designs of example base stations (BSs) and user equipment (UEs) in accordance with certain aspects of the present disclosure.

[0015] Figure 3 is an example frame format for New Radio (NR) in accordance with certain aspects of the present disclosure.

[0016] Figure 4 is an example framework for dynamic channel state information (CSI) reporting configuration.

[0017] Figure 5 is an example of independent CSI reporting for different Transmission Reception Point (TRP) disclosures.

[0018] Figure 6 is an example of a dynamic point selection system for multiple TRPs corresponding to specific transmission configuration indicator (TCI) states.

[0019] Figure 7 is a table showing an example one-to-one mapping of code points of a single CSI resource indicator (CRI) and corresponding CSI reference signal (CSI-RS) resources (CMR) for channel measurement and a single CSI-RS (CSI-IM) resource for interference measurement.

[0020] Figure 8A is an example mTRP scenario with a first CMR and a first CS-IM resource according to certain aspects of the present disclosure.

[0021] Figure 8B is an example mTRP scenario with a second CMR and a second CS-IM according to certain aspects of the present disclosure.

[0022] Figure 9 is a table illustrating an example one-to-one mapping of CRI codepoints corresponding to CRM resources to CSI-IM resources, according to certain aspects of the present disclosure.

[0023] Figure 10 is an example of a non-coherent joint transmission (NCJT) mTRP scenario with a first CMR and a second CMR and a third CSI-IM according to certain aspects of the present disclosure.

[0024] Figure 11 is a table illustrating an example one-to-one mapping of codepoints of a CRI and corresponding CMRs to NZP-IMR sets, according to certain aspects of the present disclosure.

[0025] Figure 12Ais an example mTRP scenario with a first CMR and a first NZP-IMR set according to certain aspects of the present disclosure.

[0026] Figure 12B is an example mTRP scenario with a second CMR and a second NZP-IMR set according to certain aspects of the present disclosure.

[0027] Figure 13 is a table illustrating an example one-to-one mapping of codepoints of CRI and corresponding CMR to CSI-IM resources using two CSI reports, in accordance with certain aspects of the present disclosure.

[0028] Figure 14 is a table illustrating an example one-to-one mapping of codepoints and corresponding CMRs to NZP-IMR resources for CRI using two CSI reports, in accordance with certain aspects of the present disclosure.

[0029] Figure 15 is a table illustrating an example one-to-one mapping of rank indicator (RI) pairs and corresponding CMR port groups to CSI-IM resources, according to certain aspects of the present disclosure.

[0030] Figure 16A is an example of an mTRP scenario with a first CMR port group and a first CSI-IM according to certain aspects of the present disclosure.

[0031] Figure 16B is an example of an mTRP scenario with a second CMR port group and a second CS-IM according to certain aspects of the present disclosure.

[0032] Figure 16C is an example of an NCJT mTRP scenario with a first CMR port group, a second CMR port group, and a third CS-IM according to certain aspects of the present disclosure.

[0033] Figure 17 is a table illustrating an example one-to-one mapping of RI pairs and corresponding CMR port groups to CSI-IM and NZP-IMR sets, according to certain aspects of the present disclosure.

[0034] Figure 18A is an example of an mTRP scenario with a first CMR port group, a first CSI-IM, and a first NZP-IMR set according to certain aspects of the present disclosure.

[0035] Figure 18B is an example of an mTRP scenario with a second CMR port group, a second CS-IM, and a second NZP-IMR set according to certain aspects of the present disclosure.

[0036] Figure 18Cis an example of an NCJT mTRP scenario with a first CMR port group, a second CMR port group, and a third CS-IM according to certain aspects of the present disclosure.

[0037] Figure 19 is a table illustrating an example solution for dynamic interference measurement for mTRP CSI, in accordance with certain aspects of the present disclosure.

[0038] Figure 20 is a flow chart illustrating example operations for wireless communications of a UE in accordance with certain aspects of the present disclosure.

[0039] Figure 21 is a table illustrating example codebook configurations according to certain aspects of the present disclosure.

[0040] Figure 22 is a table illustrating an example one-to-one mapping of codepoints of CRI and corresponding CRM to CSI-IM, NZP-IMR sets, and codebook configurations, according to certain aspects of the present disclosure.

[0041] Figure 23A is an example mTRP scenario with a first codebook configuration according to aspects of the present disclosure.

[0042] Figure 23B is an example mTRP scenario with a second codebook configuration according to aspects of the present disclosure.

[0043] Figure 23C is an example NCJTmTRP scenario with a first codebook configuration and a second codebook configuration according to aspects of the present disclosure.

[0044] Figure 24 is a flow chart illustrating example operations for wireless communications of a UE in accordance with certain aspects of the present disclosure.

[0045] Figure 25 A communication device is shown that may include various components configured to perform operations of the techniques disclosed herein in accordance with aspects of the present disclosure.

[0046] To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized on other aspects without specific recitation. DETAILED DESCRIPTION

[0047] Aspects of the present disclosure provide apparatus, methods, processing systems, and computer-readable media for supporting dynamic channel assumptions for wireless communications for multiple transmit reception point (mTRP) transmissions.

[0048] In certain systems such as New Radio (NR) systems, a user equipment (UE) is configured with N non-zero power (NZP) channel state information (CSI) reference signal (CSI-RS) resources (CMRs) for channel measurement. The UE is configured to select one resource from the configured N resources. The UE is also configured with CSI-RS resources (CSI-IMRs) for interference measurement. The resources used for interference measurement are associated with the resources configured for channel measurement. The CSI framework allows for dynamic channel / interference assumptions in the case of a single transmit receive point (TRP) transmission, but does support transmission of multiple TRPs.

[0049] Various aspects of the present disclosure provide apparatus, methods, processing systems, and computer-readable media for supporting dynamic channel assumptions for mTRP CSI. In some examples, a one-to-one mapping between a CSI-RS resource indicator (CRI) or rank indicator code point and one or more CMRs and one or more CSI-IMs is provided, where one CSI-IM is associated with one CMR. In some examples, a one-to-one mapping is provided for CRI / RI code points to one or more CMRs and one or more NZP-IMR sets, where each NZP-IMR set is associated with one code point. In some examples, for example, in addition to resource mapping, a mapping is provided for CRI / RI code points to codebooks.

[0050] The following description provides examples of dynamic interference measurement for mTRP CSI in a communication system, but is not intended to limit the scope, applicability, or examples set forth in the claims. The functions and arrangement of the elements discussed may be modified without departing from the scope of this disclosure. Various examples may omit, substitute, or add various processes or components as needed. For example, the described methods may be performed in an order different from that described, and individual steps may be added, omitted, or combined. Furthermore, features described with respect to some examples may be combined in other examples. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. Furthermore, the scope of this disclosure is intended to cover apparatuses or methods that may be implemented using other structures, functions, or structures and functions in addition to or different from the various aspects of this disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim. The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any aspect described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects.

[0051] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific radio access technology (RAT) and may operate on one or more frequencies. A RAT may also be referred to as a radio technology, air interface, etc. A frequency may also be referred to as a carrier, subcarrier, frequency channel, tone, subband, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs.

[0052] The technology described herein can be used for various wireless networks and radio technologies. Although this document uses terms commonly associated with 3G, 4G and / or new radio (e.g., 5G NR) wireless technologies to describe various aspects, various aspects of the present disclosure can be applied to communication systems based on other generations.

[0053] NR access can support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., 80 MHz or above), millimeter wave (mmW) targeting high carrier frequencies (e.g., 25 GHz or above), massive machine type communication (MTC) targeting non-backward compatible MTC technologies, and / or mission-critical ultra-reliable low latency communication (URLLC). These services may include latency and reliability requirements. These services may also have different transmission time intervals (TTIs) to meet corresponding quality of service (QoS) requirements. In addition, these services can coexist in the same subframe. NR supports beamforming and can dynamically configure beam directions. MIMO transmission with precoding can also be supported. MIMO configurations in the DL can support up to 8 transmit antennas, with multi-layer DL transmission of up to 8 streams and up to 2 streams per UE. Multi-layer transmission with up to 2 streams per UE can be supported. Aggregation of multiple cells up to 8 serving cells can be supported.

[0054] Figure 1 An example wireless communication network 100 is shown in which aspects of the present disclosure may be performed. For example, the wireless communication network 100 may be a NR system (e.g., a 5G NR network). Figure 1 As shown in FIG, the wireless communication network 100 may communicate with a core network 132. The core network 132 may communicate with one or more base stations (BSs) 110 and / or user equipments (UEs) 120 in the wireless communication network 100 via one or more interfaces.

[0055] like Figure 1As shown in , the wireless communication network 100 may include a plurality of BSs 110a-z (each also individually referred to herein as a BS 110 or collectively referred to herein as BS 110) and other network entities. The BSs 110 may provide communication coverage for a particular geographic area (sometimes referred to as a "cell"), which may be stationary or may be mobile depending on the location of the mobile BS 110. In some examples, the BSs 110 may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless communication network 100 using any suitable transport network over various types of backhaul interfaces (e.g., direct physical connections, wireless connections, virtual networks, etc.). Figure 1 In the example shown in FIG, BS 110a, BS 110b, and BS 110c may be macro BSs for macrocell 102a, macrocell 102b, and macrocell 102c, respectively. BS 110x may be a pico BS for picocell 102x. BS 110y and BS 110z may be femto BSs for femtocells 102y and 102z, respectively. A BS may support one or more cells. A network controller 130 may be coupled to a group of BSs 110 and provide coordination and control (e.g., via a backhaul) for these BSs 110.

[0056] BS 110 communicates with UEs 120a-y (each also referred to herein individually as UE 120 or collectively as UEs 120) in wireless communication network 100. UEs 120 (e.g., 120x, 120y, etc.) may be dispersed throughout wireless communication network 100, and each UE 120 may be stationary or mobile. Wireless communication network 100 may also include relay stations (e.g., relay station 110r) (also referred to as relays, etc.) that receive data transmissions and / or other information from an upstream station (e.g., BS 110a or UE 120r) and transmit data transmissions and / or other information to a downstream station (e.g., UE 120 or BS 110), or relay transmissions between UEs 120 to facilitate communication between devices.

[0057] According to certain aspects, BS 110 and UE 120 may be configured for dynamic interference measurement of mTRP CSI. Figure 1 As shown in FIG, BS 110a includes a CSI manager 112. Figure 1 As shown in FIG, UE 120a includes CSI manager 122. According to aspects of the present disclosure, CSI manager 112 and CSI manager 122 may be configured to perform dynamic interference measurements for mTRP CSI.

[0058] Figure 2Example components of BS 110a and UE 120a are shown (e.g., in Figure 1 ), which may be used to implement aspects of the present disclosure.

[0059] At BS 110a, transmit processor 220 may receive data from data source 212 and control information from controller / processor 240. The control information may be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a physical downlink control channel (PDCCH), a group common PDCCH (GC PDCCH), or the like. The data may be for a physical downlink shared channel (PDSCH), or the like. A medium access control (MAC)-control element (MAC-CE) is a MAC layer communication structure that may be used to exchange control commands between wireless nodes. A MAC-CE may be carried in a shared channel such as a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), or a physical sidelink shared channel (PSSCH).

[0060] The processor 220 may process the data and control information (e.g., encode and symbol map) to obtain data symbols and control symbols, respectively. The transmit processor 220 may also generate reference symbols, such as for the primary synchronization signal (PSS), secondary synchronization signal (SSS), and channel state information reference signal (CSI-RS). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​the data symbols, control symbols, and / or reference symbols (if applicable), and may provide output symbol streams to modulators (MODs) 232a-232t. Each modulator 232 may process a corresponding output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The downlink signals from modulators 232a-232t may be transmitted via antennas 234a-234t, respectively.

[0061] At UE 120a, antennas 252a-252r may receive downlink signals from BS 110a and may provide received signals to demodulators (DEMODs) in transceivers 254a-254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a corresponding received signal to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all demodulators 254a-254r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. A receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 120a to a data sink 260, and provide decoded control information to a controller / processor 280.

[0062] On the uplink, at UE 120a, a transmit processor 264 may receive and process data from a data source 262 (e.g., for a physical uplink shared channel (PUSCH)) and control information from a controller / processor 280 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 264 may also generate reference symbols for reference signals (e.g., for a sounding reference signal (SRS)). The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 (if applicable), further processed by modulators in transceivers 254a-254r (e.g., for SC-FDM, etc.), and transmitted to BS 110a. At BS 110a, the uplink signal from UE 120a may be received by antenna 234, processed by modulator 232, detected by MIMO detector 236 (if applicable), and further processed by receive processor 238 to obtain decoded data and control information sent by UE 120a. Receive processor 238 may provide decoded data to a data sink 239 and decoded control information to controller / processor 240 .

[0063] Memories 242 and 282 may store data and program codes for BS 110a and UE 120a, respectively. A scheduler 244 may schedule UEs for data transmission on the downlink and / or uplink.

[0064] The antennas 252, processors 266, 258, 264, and / or controller / processor 280 of the UE 120a and / or the antennas 234, processors 220, 230, 238, and / or controller / processor 240 of the BS 110a may be used to perform the various techniques and methods described herein. Figure 2As shown in FIG, in accordance with various aspects described herein, the controller / processor 240 of BS 110a has a CSI manager 241 that can be configured for dynamic interference measurement of mTRP CSI. Figure 2 As shown in FIG, the controller / processor 280 of the UE 120a has a CSI manager 281 that can be configured for dynamic interference measurement of mTRP CSI in accordance with various aspects described herein. Although shown at the controller / processor, other components of the UE 120a and the BS 110a can also be used to perform the operations described herein.

[0065] NR can utilize orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) on both the uplink and downlink. NR can support half-duplex operation using time division duplexing (TDD). OFDM and single-carrier frequency division multiplexing (SC-FDM) divide the system bandwidth into multiple orthogonal subcarriers, which are often referred to as tones, bins, etc. Each subcarrier can be modulated with data. Modulation symbols can be sent in the frequency domain using OFDM and in the time domain using SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers can depend on the system bandwidth. The minimum resource allocation, called a resource block (RB), can be 12 consecutive subcarriers. The system bandwidth can also be divided into subbands. For example, a subband can cover multiple RBs. NR can support a basic subcarrier spacing (SCS) of 15 kHz, and other SCSs (e.g., 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc.) can be defined relative to the basic SCS.

[0066] Figure 3 This is a schematic diagram illustrating an example of a frame format 300 for NR. The transmission timeline for each of the downlink and uplink can be divided into units of radio frames. Each radio frame can have a predetermined duration (e.g., 10 ms) and can be divided into 10 subframes with indices from 0 to 9, each subframe being 1 ms. Each subframe can include a variable number of slots (e.g., 1, 2, 4, 8, 16, ... slots) depending on the SCS. Each slot can include a variable number of symbol periods (e.g., 7 or 14 symbols) depending on the SCS. An index can be assigned to the symbol periods in each slot. A microslot, which can be referred to as a subslot structure, refers to a transmission time interval with a duration less than one slot (e.g., 2, 3, or 4 symbols). Each symbol in a slot can indicate the link direction used for data transmission (e.g., DL, UL, or flexible), and the link direction for each subframe can be dynamically switched. The link direction can be based on the slot format. Each slot can include DL / UL data and DL / UL control information.

[0067] Example CSI Feedback Configuration

[0068] CSI can refer to the channel properties of a communication link. CSI can represent the combined effects of, for example, scattering, fading, and power attenuation, and the distance between the transmitter and receiver. Channel estimation using a pilot signal such as a CSI reference signal (CSI-RS) can be performed to determine these effects on the channel. CSI can be used to adjust transmissions based on current channel conditions, which is useful for achieving reliable communication, especially in multi-antenna systems with high data rates. CSI is typically estimated at the receiver, quantized, and fed back to the transmitter.

[0069] A UE (e.g., such as UE 120a) may be configured for CSI reporting by a BS (e.g., such as BS 110). The BS may configure the UE with a CSI reporting configuration or with multiple CSI reporting configurations. The BS may provide the CSI reporting configuration to the UE via higher layer signaling, such as radio resource control (RRC) signaling (e.g., via a CSI-ReportConfig information element (IE)).

[0070] Each CSI reporting configuration can be associated with a single downlink bandwidth part (BWP). A CSI reporting configuration can define the CSI reporting band as a subset of the subbands of the BWP. The associated DL BWP can be indicated by a higher-layer parameter (e.g., bwp-Id) in the CSI reporting configuration for channel measurement and contains parameters for one CSI reporting band, such as codebook configuration, time domain behavior, frequency granularity for CSI, measurement restriction configuration, and CSI-related quantities to be reported by the UE. Each CSI resource setting can be located in a DL BWP identified by a higher-layer parameter, and all CSI resource settings can be linked to a CSI reporting setting with the same DL BWP.

[0071] The CSI reporting configuration can configure the time and frequency resources used by the UE to report CSI. For example, the CSI reporting configuration can be associated with CSI-RS resources for channel measurement (CM), interference measurement (IM), or both. The CSI reporting configuration can configure the CSI-RS resources used for measurement (e.g., via CSI-ResourceConfig IE). The CSI-RS resources provide the UE with a configuration of a CSI-RS port or a CSI-RS port group mapped to time and frequency resources (e.g., resource elements (REs)). The CSI-RS resources can be zero power (ZP) or non-zero power (NZP) resources. At least one NZP CSI-RS resource can be configured for CM. For interference measurement, it can be an NZP CSI-RS or a zero power CSI-RS, which is referred to as a CSI-IM (it should be noted that if it is an NZP CSI-RS, it is referred to as an NZP CSI-RS for interference measurement, and if it is zero power, it is referred to as a CSI-IM).

[0072] The CSI reporting configuration may configure the UE for aperiodic, periodic, or semi-persistent CSI reporting. For periodic CSI, the UE may be configured with periodic CSI-RS resources. Periodic CSI and semi-persistent CSI reporting on the physical uplink control channel (PUCCH) may be triggered via RRC or medium access control (MAC) control elements (CEs). For aperiodic and semi-persistent CSI on the physical uplink shared channel (PUSCH), the BS may signal the UE a CSI report trigger, which instructs the UE to send a CSI report for one or more CSI-RS resources or configure a CSI-RS report trigger state (e.g., CSI-AperiodicTriggerStateList and CSI-SemiPersistentOnPUSCH-TriggerStateList). CSI reporting triggering for aperiodic CSI and semi-persistent CSI on PUSCH may be provided via downlink control information (DCI). The CSI-RS trigger may be signaling to the UE indicating that a CSI-RS will be sent for a CSI-RS resource. The UE can report CSI feedback based on the CSI reporting configuration and CSI reporting trigger. For example, the UE can measure the channel associated with CSI for the triggered CSI-RS resource. Based on the measurement structure, the UE can select the preferred CSI-RS resource. The UE reports CSI feedback for the selected CSI-RS resource.

[0073] The CSI report configuration may also configure the CSI parameters (sometimes referred to as quantities) to be reported. Codebooks may include Type I single-panel, Type I multi-panel, and Type II single-panel. Regardless of which codebook is used, the CSI report may include at least a channel quality indicator (CQI), a precoding matrix indicator (PMI), a CSI-RS resource indicator (CRI), and a rank indicator (RI). The structure of the PMI may vary based on the codebook. CRI, RI, and CQI may be in the first part (Part I) of the CSI report, and PMI may be in the second part (Part II) of the CSI report.

[0074] For a type 1 single-panel codebook, the PMI may include a W1 matrix (e.g., a subset of beams) and a W2 matrix (e.g., a phase for cross-polarization combining and beam selection). For a type 1 multi-panel codebook, the PMI also includes a phase for cross-panel combining compared to a type 1 single-panel codebook. The BS may have multiple transmit (TX) beams. The UE may feed back the indices of one or more preferred beams of the candidate beams to the BS. For example, the UE may feed back the precoding vector w for layer l:

[0075]

[0076] where b represents an oversampled beam (e.g., a discrete Fourier transform (DFT) beam) for both polarizations, and Are in phase.

[0077] For a Type II codebook (e.g., as might be designed for a single panel), the PMI is a linear combination of beams; it has a subset of orthogonal beams to be used for the linear combination, and for each beam, has per-layer, per-polarization, amplitude, and phase. The preferred precoder for a layer can be a combination of a beam and associated quantization coefficients, and the UE can feed back the selected beam and coefficients to the BS.

[0078] The UE can report CSI feedback based on the CSI reporting configuration and CSI reporting trigger. For example, the UE can measure the channel associated with the CSI for the triggered CSI-RS resource. Based on the measurement results, the UE can select a preferred CSI-RS resource. The UE reports CSI feedback for the selected CSI-RS resource. The LI can be calculated based on the reported CQI, PMI, RI, and CRI; the CQI can be calculated based on the reported PMI, RI, and CRI; the PMI can be calculated based on the reported RI and CRI; and the RI can be calculated based on the reported CRI.

[0079] Example SD compressed CSI feedback

[0080] In certain systems (e.g., Release 15 5G NR), the UE may be configured to report at least Type II precoders across configured frequency domain (FD) units. As configured, the UE may report wideband (WB) PMI and / or subband (SB) PMI.

[0081] For layer 1, its precoder across N3 FD units (also called PMI subbands) can be composed of a size of N t ×N3 matrix W l Given as follows:

[0082] W l =W1×W 2,l ,

[0083] Among them, W1 and W 2,l As described in the table below:

[0084]

[0085]

[0086] These two matrices can be written as:

[0087]

[0088] Among them, the SD basis is based on DFT and has index and The SD base is written as

[0089]

[0090]

[0091] And the coefficient matrix can be written as

[0092]

[0093] In some cases, a common (P1) value may apply to all Coefficients (or simply P1 coefficients). In this case, given 2L rows in the matrix, the P1 values ​​are row-specific and there are 2L possible different values ​​for these coefficients. and is described as follows:

[0094]

[0095]

[0096] More precisely, the linear combination representation can be written as:

[0097]

[0098] For the linear combination of spatial beams B, the UE can report the linear combination coefficients for each layer l and each subband i according to the precoding vector w.

[0099]

[0100] The precoder matrix W is based on the spatial domain (SD) compression of matrices W1 and W2 to report (for cross-polarization) the linear combination coefficients for the selected beam (2L) across the configured FD units.

[0101] For port selection in some systems (e.g., Rel-15 NR port selection), the BS (e.g., gNB) can use The beam in is used as the precoder for CSI-RS. The precoder for the layer on the subband is given by:

[0102]

[0103] in, is a vector. In this case, the UE selects, for example, a CSI-RS port instead of a beam. Therefore, using this codebook, if the (i 11 d+i) equals 1 and the rest are 0, which means that the (i)th 11 Using this codebook, there are P ports, where the first half of the ports are for polarization 1 and the other half of the ports are for polarization 2, and the same L ports are applied to both polarizations. 11 To report the preferred candidate L ports, where candidate is candidate L port, is 0...L-1, and candidate L port is d...d+L-1. The final candidate L port is In this case, the UE may be restricted to selecting L consecutive ports (eg, port i 11 d,…i 11 d+L-1), and the maximum number of ports may be 32, which may not be enough and the FD basis should be adjusted.

[0104] Example SD and FD compressed CSI feedback

[0105] In some systems (e.g., Rel-16 5G NR), the UE can be configured to report frequency domain (FD) compressed precoder feedback to reduce the overhead of CSI reporting. For codebook operation with FD compression, for layer 1, its precoder across N3 FD units (e.g., PMI subbands) is composed of Nt Matrix W of × N3 l Given as follows:

[0106]

[0107] Where, W1, and W f Are described as follows:

[0108]

[0109]

[0110] The precoder matrix (W 2,i ) for the i-th layer (where i = 0, 1) can use the FD compression Matrix to compress the precoder matrix to a matrix size of 2L X M (where, M is network-configured and transmitted in the CSI configuration message via RRC or DCI, and M < N3), which is given as:

[0111]

[0112] Where, the precoder matrix W i (not shown) has P = 2N1N2 rows (spatial domain, number of ports) and N3 columns (frequency domain compression units including RBs or reporting subbands), and where, M bases are independently selected for each of layer 0 and layer 1. The matrix consists of linear combination coefficients (amplitude and in-phase), where each element represents the tap coefficient for the beam. The matrix can be defined by a size of 2L X M, where one row corresponds to one spatial beam in W1 (not shown) of size P X 2L (where, L is network-configured via RRC), and one term therein represents the coefficient for one tap of that spatial beam.

[0113] The UE can be configured to report (e.g., CSI report) A subset K0 < 2LM of the linear combination coefficients of the matrix. For example, the UE can report K NZ,i < K0 coefficients (where, K NZ,i corresponds to the maximum number of non-zero coefficients of layer i where i = 0 or 1, and K0 is network-configured via RRC), as shown by the shaded squares (unreported coefficients are set to zero). In some configurations, One term in the matrix corresponds to One row of the matrix at layer 0 and the The matrices are both 2L XM.

[0114] The matrix is ​​composed of basis vectors (each row is a basis vector) that are used to perform frequency domain compression. In the example shown, the Matrix and layer 1 The matrix consists of M=4 FD bases from N3 candidate DFT bases. In some configurations, the UE may report via CSI reporting A subset of the selected basis of the matrix. The M basis is specially selected at level 0 and level 1. That is, the M basis selected at level 0 can be the same as / partially overlap / non-overlap with the M basis selected at level 1.

[0115] The precoder can be written as:

[0116]

[0117] As discussed above, Type II CSI with FD compression can compress N3 subbands via M FD bases. The FD bases are selected / reported layer-specifically. For each layer, the UE reports a subset of 2LM coefficients in total, where the coefficient selection can be layer-specific and the UE can use a 2LM bitmap to indicate the selected non-zero coefficients (NZCs) and report each NZC after quantization. In some examples, the UE can report up to K0 coefficients per layer, where K NZ,l ≤K0. In some examples, the UE may report up to 2K0 coefficients across all layers, where Those not reported were set to zero.

[0118] The UE may report CSI in uplink control information (UCI). In some examples, CSI is reported in two parts of UCI. In some examples, in UCI part one, the UE may send RI, CQI, number of non-zero coefficients (NNZC). In some examples, in UCI part two, the UE may send SD beam selection, FD basis selection, coefficient selection, strongest coefficient indication (SCI), and / or coefficient quantization for supported layers (e.g., layers 0 to RI-1). SD beam selection may indicate the selected beam (e.g., a subset of 2L beams).

[0119] Example mTRP and NCJT

[0120] In some systems, a transmission may be via multiple transmission configuration indicator (TCI) states. In some examples, a TCI state is associated with a beam pair, antenna panel, antenna port, antenna port group, quasi co-location (QCL) relationship, and / or transmit receive point (TRP). Thus, a multi-TCI state transmission may be associated with multiple beam pairs, multiple antenna panels, and / or multiple QCL relationships that may be associated with one or more TRPs. The TCI state indicates the QCL assumption that the UE may use for channel estimation.

[0121] In some examples, the TCI state can generally indicate to the UE an association between a downlink reference signal and a corresponding QCL type, which can allow the UE to determine a receive beam for receiving a transmission. A QCL type can be associated with a combination (e.g., a set) of QCL parameters. In some examples, QCL-TypeA indicates that the port is QCL with respect to Doppler shift, Doppler spread, average delay, and delay spread; QCL-TypeB indicates that the port is QCL with respect to Doppler shift and Doppler spread; QCL-TypeC indicates that the port is QCL with respect to average delay and Doppler shift; and QCL-TypeD indicates that the port is QCL with respect to spatial reception parameters. Different port groups can share different sets of QCL parameters.

[0122] In some examples, for a multi-TCI state scenario, the same TB / CB (e.g., the same information bits but may be different coded bits) is sent from multiple TCI states (such as two or more TRPs in a multi-TRP scenario). The UE considers transmissions from the two TCI states and jointly decodes the transmissions. In some examples, the transmissions from the TCI states are simultaneous (e.g., in the same time slot, mini-slot, and / or in the same symbol), but span different RBs and / or different layers. The number of layers from each TCI state may be the same or different. In some examples, for mTRP transmissions of the same codeword (i.e., the same transport block / code block), the modulation order may be the same. For mTRP transmissions involving different codewords (e.g., two codewords from two TRPs), each codeword may be associated with a rank, modulation, and resource allocation (e.g., referred to as mTRP transmissions based on multiple DCI). In some examples, transmissions from the TCI states may be at different times (e.g., in two consecutive mini-slots or time slots). In some examples, transmissions from the TRPs may be a combination of the above.

[0123] In certain wireless communication networks (e.g., new radio), non-coherent joint transmission (NCJT) can be used to provide multiple-input multiple-output (MIMO), multi-user (MU) MIMO and / or coordinated multi-point (CoMP) communications. NCJT can come from multiple transmit-receive points (multi-TRPs), multiple panels of TRPs (multi-panel), or a combination thereof. Coherent joint transmission requires synchronization between transmit-receive points (TRPs). However, for distributed TRPs, the precoders cannot be designed jointly, and therefore the TRPs are not synchronized. Instead, each TRP independently derives the precoder without knowledge of the precoders used by other TRPs. Therefore, the joint transmission is non-coherent. Using NCJT, the TRPs can send the same data to the UE to improve transmission reliability / coverage. In addition, using NCJT, the TRPs can send different data streams to the UE to improve throughput. For NCJT, the UE can select multiple CSI reference signal (CSI-RS) resources or CSI-RS with multiple ports for CSI reporting. Thus, the UE may be configured to report a CRI indicating the selected resources and a CSI (which includes RI, PMI, and CQI) for each of the selected resources and / or port groups.

[0124] Aspects of the present disclosure generally relate to interference measurements for mTRP CSI.

[0125] As discussed above, the UE may be configured with a CSI reporting configuration. Figure 4 An example CSI reporting configuration is shown. Figure 4 As shown in , the CSI reporting configuration can configure a CMR setting, a CMR setting and a CSI-IM setting for the UE, or a CMR setting, a CSI-IM setting and an NZP-IMR setting. Each setting can be associated with multiple resource sets, each resource set including multiple resources. In some examples, the number of resources in the CMR set can be the same as the number of resources in the CSI-IM set, but the number of resources in the NZP-IMR set can be different. Each resource setting can have an active set at a given time. The active set can have up to N=8 resources, and the UE can be configured to select a resource from the N configured CMRs. These CMRs can be associated with the CSI-IM resources and the NZP-IMR set in terms of resources. Each port of the NZP-IMR can correspond to an interference layer. The NZP-IMR and CSI-IM can share Type-D QCL with the associated CMR. The UE can measure the interference from the interference resources associated with the selected CMR. The UE can use the interference measurement results to perform interference mitigation.

[0126] The CSI reporting configuration supports CSI for one TRP, but may not support CSI from NCJT of multiple TRPs in mTRP scenario. For example, for two TRPs, the UE uses independent CSI reporting for each TRP, such as Figure 5 (e.g., CSI reporting configuration 0 is used for TRP 0, and CSI reporting configuration 1 is used for TRP 1). The UE may perform dynamic point selection (e.g., by selecting one of N CMRs (CMRs are associated with different TRPs)), but does not support selection of multiple CMRs / TCI states / TRPs, such as Figure 6 and Figure 7 In addition, the UE may select CSI-IM to measure interference from TRPs outside the measurement result set, such as Figure 7 、 8A and Figure 8B For example, the first CRI code point (e.g., CRI 0) may correspond to the first CMR (e.g., n1) and be mapped to the first CSI-IM (e.g., m1), as shown in FIG. Figure 8A As shown in , and the second CRI code point (e.g., CRI 1) can correspond to the second CMR (e.g., n2) and be mapped to the second CSI-IM (e.g., m2), as shown in Figure 8B As shown in .

[0127] Therefore, what are needed are techniques and apparatus for mTRP CSI to select and report preferred TRP / TRP pairs.

[0128] Example dynamic interference measurement for mTRP CSI

[0129] Aspects of the present disclosure provide techniques for channel state information (CSI) reporting that may allow a user equipment (UE) to report CSI in a multiple transmit receive point (mTRP) scenario. For example, CSI may be used for non-coherent joint transmission (NJCT) from multiple TRPs. In some examples, the UE may report a preferred TRP or a preferred pair of TRPs.

[0130] According to certain aspects, CSI reference signal (CSI-RS) resources (CMRs) for channel measurement are associated with CSI-RS resources (IMRs) for interference measurement. CMRs and IMRs may be associated via a CSI resource indicator (CRI) or a rank indicator (RI) pair. For example, CMRs and IMRs may be associated via a one-to-one mapping between a code point (CRI or RI pair) and an IMR, where a code point corresponds to one or more CMRs. An IMR may include one or more CSI-RS resources (CSI-IMs) for interference measurement and / or one or more non-zero power (NZP) CSI-RS resources (NZP-IMRs) for interference measurement.

[0131] According to certain aspects, resources from different TRPs can be simulated by CSI-RS resources, port groups, or CSI report configurations. In some examples, an indication of code points associated with multiple TRPs (e.g., CRI 2, {RI>0, RI>0}, same CRI for two CSI reports) can indicate that the UE prefers mTRP transmission, and the resource indication can indicate the preferred TRP.

[0132] According to certain aspects, a mapping for CRI to resources is provided.

[0133] Example mTRP CSI using different CMRs or CMR pairs to simulate TRP:

[0134] As mentioned above, different resources can be used to simulate TRP.

[0135] According to certain aspects, there may be a one-to-one mapping between CRI code points (corresponding to CMRs or CMR pairs) and CSI-IM resources, such as Figure 9 Alternatively, there is a mapping between a CSI-IM resource and a CMR pair. For example, the CRI may have a value corresponding to Figure 7 、 8A and Figure 8B As discussed above, the first CRI code point (e.g., CRI 0) may correspond to the first CMR (e.g., n1) and be mapped to the first CSI-IM (e.g., m1), as shown in FIG. Figure 8A In this case, the first channel / interference hypothesis includes measuring the channel using CMR n1 corresponding to TRP0 and measuring the interference using CSI-IMm1 corresponding to interference from TRP1 and other TRPs outside the measurement result set.

[0136] The second CRI code point (eg, CRI 1) may correspond to a second CMR (eg, n2) and be mapped to a second CSI-IM (eg, m2), as shown in FIG. Figure 8B In this case, the channel / interference hypothesis includes measuring the channel using CMR n2 corresponding to TRP1 and measuring the interference using CSI-IM m2 corresponding to the interference from TRP0 and other TRPs outside the measurement result set.

[0137] For NCJT instructions, Figure 9 The CRI shown in FIG also includes a third code point (e.g., CRI 2) corresponding to two CMRs (e.g., n1 and n2) and is mapped to the CRI for Figure 10In this case, the channel / interference assumption includes measuring the channel using CMR n1 corresponding to TRP0 and using CMR n2 corresponding to TRP1, and measuring the interference using CSI-IM m3 corresponding to interference from outside the measurement result set (different from TRP0 and TRP1).

[0138] According to certain aspects, there may be a one-to-one mapping between a CRI codepoint (which corresponds to a CMR or CMR pair) and an NZP-IMR set, such as Figure 11 As shown in . Alternatively, there is a mapping between one NZP-IMR set and a CMR pair. In mTRP, multiple NZP-IMR sets can be used. Figure 11 As shown in , in addition to CSI-IMR, NZP-IMR sets can be mapped to CRI code points corresponding to CMR. For example, for Figure 12A In the mTRP scenario shown in , the first CRI codepoint (e.g., CRI0) is further mapped to the first NZP-IMR set (e.g., s1). In this case, the first channel / interference hypothesis includes measuring the channel using CMR n1 corresponding to TRP0, measuring interference using CSI-IM m3 corresponding to interference from other TRPs outside the measurement result set, and measuring interference using NZP-IMR set s1 corresponding to interference from TRP1.

[0139] for Figure 12B In the mTRP scenario shown in , the second CRI code point (e.g., CRI 1) is mapped to the second NZP-IMR set (e.g., s2). In this case, the channel / interference assumptions include measuring the channel using CMR n2 corresponding to TRP1, measuring interference using CSI-IMR m3 corresponding to interference from other TRPs outside the measurement result set, and measuring interference using NZP-IMR set s2 corresponding to interference from TRP0.

[0140] The third code point can be similar to Figure 9 , and is not mapped to any NZP-IMR (e.g., because both are being measured). In this case, the channel / interference assumptions include measuring the channel using CMR n1 corresponding to TRP0 and using CMR n2 corresponding to TRP1, measuring interference using CSI-IM m3 corresponding to interference from a TRP outside the measurement result set (different from TRP0 and TRP1), and not using any NZP-IMR set to measure interference.

[0141] According to certain aspects, the UE may apply the Quasi Co-location (QCL)-Type D of the CMR indicated by the CRI to the corresponding CSI-IM and / or NZP-IMR set. In some examples, the UE may use the same receive beam as used for the associated CMR for measurements in the CSI-IM and / or NZP-IMR set.

[0142] Example mTRP CSI emulating TRP using different CSI reporting configurations:

[0143] As mentioned above, different resources and different CSI reporting configurations can be used to simulate TRP. In this case, a separate CSI reporting configuration can be used instead of the third CRI code point.

[0144] According to certain aspects, there may be a one-to-one mapping between CRI code points (corresponding to CMRs or CMR pairs) and CSI-IM resources, such as Figure 13 As shown in . Alternatively, there is a mapping between a CSI-IM resource and a CMR pair. For example, for Figure 8A For the TRP scenario shown in FIG, the CRI for the first CSI reporting configuration (CSI report 0) may have a first code point (e.g., CRI 0) corresponding to the first CMR (e.g., n1) and be mapped to the first CSI-IM (e.g., m1). Figure 8B In the TRP scenario shown in , the CRI for the second CSI reporting configuration (CSI Report 1) may have a first code point (e.g., CRI 0) corresponding to the second CMR (e.g., n2) and mapped to the second CSI-IM (e.g., m2). Figure 10 For the mTRP scenario shown in , the CRI for the first CSI reporting configuration may have a second code point (e.g., CRI 1) corresponding to two CMRs (e.g., n1 and n2) and mapped to a second CSI-IM (e.g., m3). Figure 10 In the mTRP scenario shown in , the CRI for the second CSI reporting configuration may have a second code point (e.g., CRI 1) corresponding to two CMRs (e.g., n1 and n2) and mapped to a second CSI-IM (e.g., m3).

[0145] According to certain aspects, there may be a one-to-one mapping between a CRI codepoint (corresponding to a CMR or CMR pair) and an NZP-IMR set, such as Figure 14 As shown in . Alternatively, there is a mapping between one NZP-IMR set and a CMR pair. In mTRP, multiple NZP-IMR sets can be used. Figure 14As shown in , in addition to CSI-IMR, NZP-IMR sets can also be mapped to CRI code points corresponding to CMR. For example, for Figure 12A In the mTRP scenario shown in , the first CSI report may have a first CRI code point (e.g., CRI 0), which is further mapped to a first NZP-IMR set (e.g., s1). Figure 12B In the mTRP scenario shown in , the second CSI report may have a first CRI code point (e.g., CRI 0), which is further mapped to a second NZP-IMR set (e.g., s2). The first CSI report may have a second CRI code point for NCJT (e.g., CRI 1), which is not mapped to any NZP-IMR (e.g., because both are being measured). The second CSI report may also have a second CRI code point for NCJT (e.g., CRI 1), which is not mapped to any NZP-IMR.

[0146] According to certain aspects, the UE may apply the QCL-Type D of the CMR indicated by the CRI to the corresponding CSI-IM and / or NZP-IMR set. In some examples, the UE may use the same receive beam as used for the associated CMR for measurements in the CSI-IM and / or NZP-IMR set.

[0147] Example mTRP CSI emulating TRP using different CSI port groups:

[0148] As mentioned above, different CSI port groups can be used to emulate TRP.

[0149] According to certain aspects, there may be a one-to-one mapping between RI pairs (corresponding to CMR port groups or port group pairs) and CSI-IM resources, such as Figure 15 Alternatively, there is a mapping between a CSI-IM resource and a port group or port group pair. For example, a first RI pair (e.g., RI0>0, RI1=0) may correspond to a first port group (CMR 0, port group 0) of a CMR associated with a first TCI state / TRP (e.g., TRP 0) and be mapped to a first CSI-IM (e.g., m1), as shown in FIG. Figure 16A In this case, the channel / interference assumptions include measuring the channel using CMR 0 port group 0 corresponding to TRP0, and measuring the interference using CSI-IM m1 corresponding to the interference from TRP1 and other TRPs outside the measurement result set.

[0150] The second RI pair (e.g., RI0=0, RI1>0) may correspond to a second port group (CMR 0, port group 1) of a CMR associated with a second TCI state / TRP (e.g., TRP 1) and be mapped to a second CSI-IM (e.g., m2), as shown in FIG. Figure 16B In this case, the channel / interference assumptions include measuring the channel using CMR 0 port group 1 corresponding to TRP1 and measuring interference using CSI-IM m2 corresponding to interference from TRP0 and other TRPs outside the measurement result set.

[0151] For NCJT instructions, Figure 16C In the mTRP scenario shown in , the third RI pair (e.g., RI0>0, RI1>0) can correspond to the first and second port groups of the CMR (e.g., CMR 0, port group 0, and port group 1) and be mapped to a third CSI-IM (e.g., m3). In this case, the channel / interference assumption includes: measuring the channel using CMR port group 0 corresponding to TRP0 and using CMR port group 1 corresponding to TRP1, and measuring interference using CSI-IM m3 corresponding to interference from a TRP outside the measurement result set (different from TRP0 and TRP1).

[0152] According to certain aspects, there may be a one-to-one mapping between RI pairs (corresponding to CMR port groups or port group pairs) and NZP-IMR sets, such as Figure 17 As shown in . Alternatively, there is a mapping between an NZP-IMR set and a port group or port group pair. In mTRP, multiple NZP-IMR sets can be used. Figure 17 As shown in , in addition to CSI-IMR, NZP-IMR sets can be mapped to RI pairs corresponding to CMR port groups. Figure 18A In the TRP scenario shown in , the first RI pair (e.g., RI0>0, RI1=0) is further mapped to the first NZP-IMR set (e.g., s1). In this case, the channel / interference assumptions include: using CMR 0 port group 0 corresponding to TRP0 to measure the channel, using CSI-IM m1 corresponding to the interference from other TRPs outside the measurement result set to measure the interference, and using NZP-IMR set s1 corresponding to the interference from TRP1 to measure the interference.

[0153] for Figure 18BIn the TRP scenario shown in , the second RI pair (e.g., RI0=0, RI1>0) is mapped to the second NZP-IMR set (e.g., s2). In this case, the channel / interference assumptions include: measuring the channel using CMR 0 port group 1 corresponding to TRP1, measuring interference using CSI-IM m1 corresponding to interference from other TRPs outside the measurement result set, and measuring interference using NZP-IMR set s2 corresponding to interference from TRP0.

[0154] For NCJT, the third RI pair (e.g., RI0>0, RI1>0) corresponds to the first and second port groups of the CMR (e.g., CMR 0, port group 0, and port group 1) and is not mapped to any NZP-IMR (e.g., because both are being measured). In this case, the channel / interference assumptions include: measuring the channel using CMR 0 port group 0 corresponding to TRP0 and using CMR0 port group 1 corresponding to TRP1, measuring interference using CSI-IM m1 corresponding to interference from a TRP outside the measurement result set (different from TRP0 and TRP1), and not measuring interference using any NZP-IMR set.

[0155] According to certain aspects, the UE may apply QCL-Type D for the CMR port group indicated by the RI pair to the corresponding CSI-IM and / or NZP-IMR set. In some examples, the UE may use the same receive beam as used for the associated CMR port group for measurements in the CSI-IM and / or NZP-IMR set.

[0156] Figure 20 2 is a flow chart illustrating example operations 2000 for wireless communication according to certain aspects of the present disclosure. Operations 2000 may be performed, for example, by a UE (e.g., such as UE 120a in wireless communication network 100). Operations 2000 may be implemented as a process on one or more processors (e.g., Figure 2 In addition, the system can be connected to the network via one or more antennas (e.g., Figure 2 The transmission and reception of signals by the UE in operation 2000 may be implemented using antennas 252 of the UE. In certain aspects, the transmission and / or reception of signals by the UE may be implemented via a bus interface of one or more processors (e.g., controller / processor 280) that obtain and / or output signals.

[0157] Operations 2000 may begin at 2005 by receiving a CSI reporting configuration that configures a plurality of CMRs and a plurality of IMRs for a UE.

[0158] At 2010, the UE determines an indicator based on an association between one or more CMRs and one or more IMRs. The codepoint of the indicator is associated with the IMRs or IMR sets in the order in which the IMRs or IMR sets are configured and is associated with a portion of a CMR, a CMR pair, or a port of a CMR.

[0159] At 2015, the UE performs CSI measurement based on the association.

[0160] In some examples, the UE determines that the IMR is a CSI-IM and determines a one-to-one mapping between the code point of the indicator and the CSI-IM according to the order of the CSI-IM in the configuration. In some examples, the CSI-IM is a zero-power resource used for interference measurement.

[0161] In some examples, the UE determines that the IMR is an NZP-IMR, determines an NZP-IMR resource configuration that configures more than one active NZP-IMR sets, each set including multiple NZP-IMRs, and determines a one-to-one mapping between code points of the indicator and the active NZP-IMR sets according to the order of the NZP-IMR sets in the configuration.

[0162] In some examples, the indicator is a CRI, and the UE determines that the first code point is associated with the first CMR and the first CSI-IM resource based on the order of the first CSI-IM resource in the configuration, and / or determines that the first code point is associated with the first NZP-IMR set based on the order of the first NZP-IMR set in the configuration, and the UE determines that the second code point is associated with the CMR pair and the second CSI-IM resource based on the order of the second CSI-IM resource in the configuration, and / or determines that the second code point is associated with the second NZP-IMR set based on the order of the second NZP-IMR set in the configuration.

[0163] In some examples, the indicator is an RI pair, and the UE determines, based on the order of the first CSI-IM resource in the configuration, that the first RI pair with a rank of zero in the pair is associated with the first port group of the first CMR and associated with the first CSI-IM resource, and / or determines, based on the order of the first NZP-IMR set in the configuration, that the first RI pair with a rank of zero in the pair is associated with the first NZP-IMR set, and the UE determines, based on the order of the second CSI-IM resource in the configuration, that the second RI pair with a non-zero rank in the pair is associated with the two port groups of the first CMR and associated with the second CSI-IM resource, and / or determines, based on the order of the second NZP-IMR set in the configuration, that the second RI pair with a non-zero rank in the pair is associated with the second NZP-IMR set.

[0164] In some examples, the UE determines that a CSI-IM resource or NZP-IMR set is associated with a CMR pair or CMR having more than one port group, and the UE determines the QCL of all resources within the CSI-IM resource or NZP-IMR set based on the QCL of the CMR pair or the QCL of more than one port group within the CMR.

[0165] In some examples, the UE determines the association between the indicated codepoint and the CMR or CMR pair based on a configuration sent by the network or based on the number of CMRs that follow a rule.

[0166] Operations corresponding to operation 2000 may be performed by a BS (eg, such as BS 110a).

[0167] Example CRI to resource mapping:

[0168] According to certain aspects, a UE may be configured with a CRI to resource mapping and / or a RI pair to port grouping mapping. In some examples, the mapping may be configured by the network.

[0169] In some examples, the mapping can be configured according to a specified rule. For example, the rule can specify that for N resources, CRI code points (e.g., CRI 0...N-1) map to resources 0...N-1 (for a single TRP selection), and for NCJT, the rule can specify (ie, select 2 from N, corresponding to N*(N-1) / 2) to map to combinations of resource pairs. In another example, the rule may specify that for N port groups, the first N·RI max The pair corresponds to a single port group selection, and finally The pair corresponds to multiple port group selections. In the illustrative example, for N=2 and RI max =4 (e.g., the maximum rank of a single TRP), then the RI pair (1,0), (2,0), (3,0)(4,0) is used only for TRP 0's RI={1,2,3,4}; the RI pair (0,1), (0,2), (0,3)(0,4) is used only for TRP 1's RI={1,2,3,4}; and the RI pair (1,1), (2,1), (1,2)(2,2) is used for NCJT with TRP 0 and TRP 1.

[0170] In some examples, the network can further configure CRI restrictions or RI restrictions to allow only single TRP CSI or only mTRP CSI. For example, CRI restrictions on mTRP CSI can allow the UE to report only the last few CRI code points corresponding to the mTRP transmission, so that the UE only needs to calculate the CSI of the NJCT. RI restrictions on mTRP CSI can allow the UE to report only non-zero RI pairs, so that the UE is only allowed to calculate the CSI of the NJCT.

[0171] Example CRI to codebook mapping:

[0172] According to certain aspects, different TRPs may use different codebook configurations. For example, different codebook configurations may use different numbers of CSI ports, different codebook types, different parameter configurations, and / or different codebook subset restrictions (CBSRs), such as Figure 21 For switching between TRPs and for mTRPs, the UE can use multiple codebooks that can handle dynamic configuration of ports, types, parameters, etc. For example, for the illustrative example described herein, where TRP 0 has 4 ports and TRP 1 has 8 ports, the TRPs can use different codebook configurations. As another example, a TRP can have different beam restrictions based on interference levels and for interference muting.

[0173] According to certain aspects, a UE may be configured with a one-to-one mapping of CRI and / or RI pairs (or port groups) of codepoints to codebooks, such as Figure 22 As shown in . Alternatively, there is a one-to-one mapping between codebooks and resources, or a one-to-one mapping between codebooks and port groups. The mapping is based on the order and sequence of codebook configuration or resource configuration or port group configuration. The mapping can be configured by the network or fixed (e.g., preconfigured or predefined in the wireless standard). Figure 22 As shown in Figure 23A In the mTRP scenario shown in , the first code point of the CRI (or RI pair) is further mapped to the first codebook configuration (e.g., CB configuration 0). Figure 23B In the mTRP scenario shown in , the second code point of the CRI (or RI pair) is further mapped to the second codebook configuration (e.g., CB configuration 1). Figure 23C In the mTRP scenario shown in , the third code point of CRI is further mapped to the first and second codebook configurations (e.g., CB configuration 0 and CB configuration 1).

[0174] Figure 242 is a flow chart illustrating example operations 2400 for wireless communication according to certain aspects of the present disclosure. Operations 2400 may be performed, for example, by a UE (e.g., such as UE 120a in wireless communication network 100). Operations 2400 may be implemented as a process on one or more processors (e.g., Figure 2 In addition, the system can be connected to the network via one or more antennas (e.g., Figure 2 The transmission and reception of signals by the UE in operation 2400 may be implemented using antennas 252 of the UE. In certain aspects, the transmission and / or reception of signals by the UE may be implemented via a bus interface of one or more processors (e.g., controller / processor 280) that obtain and / or output signals.

[0175] Operations 2400 may begin at 2405 by receiving a CSI reporting configuration that configures a plurality of CMRs for a UE.

[0176] At 2410, the UE determines an indicator. The code point of the indicator is associated with a CMR, a pair of CMRs, a port group of CMRs, or two port groups of CMRs. The indicator can be a CRI or an RI pair.

[0177] At 2415 , the UE determines an association between a codepoint and a CMR, a CMR pair, a port group of a CMR, or two port groups of a CMR based on the number of CMRs or the number of port groups in the CMR based on network configuration or by means of a rule.

[0178] In some examples, the UE determines that a first set of codepoints is associated with a single CMR or a single port group of a CMR. The number of codepoints in the first set may be equal to the number of CMRs or the number of port groups in the CMR. The UE determines that a second set of codepoints is associated with a CMR pair or two port groups of CMRs. The number of codepoints in the second set may be equal to the total number of CMR pairs in all CMRs or the total number of port group pairs in all port groups in the CMR.

[0179] At 2420, the UE performs CSI measurement based on the association.

[0180] At 2425 , the UE reports a codepoint indicating an indicator of a selected CMR, CMR pair, port group of CMRs, or two port groups of CMRs.

[0181] In some examples, the UE receives a CRI limit or RI pair limit from the network that restricts a subset of codepoints. The UE performs CSI measurements on CMRs, CMR pairs, port groups, or port group pairs associated with non-restricted codepoints and reports the indicator for codepoints from the subset of non-restricted codepoints.

[0182] In some examples, the UE receives more than one codebook configuration from the network. The UE determines an association between the codebook configuration and the CMR or a port group in the CMR based on the network configuration, or determines an association between the codebook configuration and the indicated codepoint based on the network configuration.

[0183] In some examples, each indicated codebook includes the number of ports, the type of CSI feedback, and / or codebook subset restrictions.

[0184] Operations corresponding to operation 2400 may be performed by a BS (eg, such as BS 110a).

[0185] Figure 25 A communication device 2500 is shown that may include various components (eg, corresponding to functional unit components) configured to perform operations of the techniques disclosed herein (such as Figure 20 and / or Figure 24 ). The communication device 2500 includes a processing system 2502 coupled to a transceiver 2508 (e.g., a transmitter and / or a receiver). The transceiver 2508 is configured to transmit and receive signals for the communication device 2500 (such as the various signals described herein) via an antenna 2510. The processing system 2502 can be configured to perform processing functions for the communication device 2500, including processing signals received by and / or to be transmitted by the communication device 2500.

[0186] The processing system 2502 includes a processor 2504 coupled to a computer-readable medium / memory 2512 via a bus 2506. In certain aspects, the computer-readable medium / memory 2512 is configured to store instructions (e.g., computer-executable code) that, when executed by the processor 2504, cause the processor 2504 to perform Figure 20 and / or Figure 24or other operations for performing the various techniques for mTRP CSI discussed herein. In certain aspects, according to aspects of the present disclosure, the computer-readable medium / memory 2512 stores code 2514 for receiving a CSI reporting configuration; code 2516 for determining an indicator and associated CMR, CSI-IM, NZP-IMR set and / or codebook configuration; code 2518 for performing CSI measurements; and / or code 2520 for reporting CSI and indicator codepoints. In certain aspects, the processor 2504 has circuitry configured to implement the code stored in the computer-readable medium / memory 2512. According to aspects of the present disclosure, the processor 2504 includes circuitry 2522 for receiving a CSI reporting configuration; circuitry 2524 for determining an indicator and associated CMR, CSI-IM, NZP-IMR set and / or codebook configuration; circuitry 2526 for performing CSI measurements; and / or circuitry 2528 for reporting CSI and indicator codepoints.

[0187] The techniques described herein can be used for various wireless communication technologies such as NR (e.g., 5G NR), 3GPP Long Term Evolution (LTE), LTE-Advanced (LTE-A), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), Time Division Synchronous Code Division Multiple Access (TD-SCDMA), and other networks. The terms "network" and "system" are often used interchangeably. A CDMA network can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, and the like. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95, and IS-856 standards. A TDMA network can implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA networks can implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash OFDMA, and the like. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). cdma2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). NR is an emerging wireless communication technology under development.

[0188] In 3GPP, the term "cell" can refer to the coverage area of ​​a Node B (NB) and / or the NB subsystem serving that coverage area, depending on the context in which the term is used. In NR systems, the terms "cell" and "base station," next-generation Node B (gNB or gNodeB), access point (AP), distributed unit (DU), operator, or transmit / receive point (TRP) can be used interchangeably. A base station (BS) can provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access by UEs with service subscriptions. A pico cell can cover a relatively small geographic area and can allow unrestricted access by UEs with service subscriptions. A femto cell can cover a relatively small geographic area (e.g., a residence) and can allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs for users in a residence, etc.). A base station for a macro cell can be referred to as a macro base station. A base station for a pico cell can be referred to as a pico base station. A BS for a femto cell may be referred to as a femto BS or a home BS.

[0189] A UE may also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, customer premises equipment (CPE), a cellular phone, a smartphone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a home appliance, a medical device or medical apparatus, a biosensor / device, a wearable device such as a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring, a smart bracelet, etc.), an entertainment device (e.g., a music device, a video device, a satellite radio device, etc.), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing device, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium. Some UEs may be considered machine type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, and the like that can communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node can provide connectivity to or to a network (e.g., a wide area network such as the Internet or a cellular network) via, for example, a wired or wireless communication link. Some UEs can be considered Internet of Things (IoT) devices, which can be narrowband IoT (NB-IoT) devices.

[0190] In some examples, access to the air interface can be scheduled. A scheduling entity (e.g., BS) allocates resources for communication between some or all devices and apparatuses within its service area or cell. A scheduling entity can be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communications, subordinate entities utilize the resources allocated by the scheduling entity. A base station is not the only entity that can act as a scheduling entity. In some examples, a UE can act as a scheduling entity and can schedule resources for one or more subordinate entities (e.g., one or more other UEs), and other UEs can utilize the resources scheduled by the UE for wireless communication. In some examples, a UE can act as a scheduling entity in a peer-to-peer (P2P) network and / or in a mesh network. In the mesh network example, in addition to communicating with the scheduling entity, UEs can also communicate directly with each other.

[0191] The methods disclosed herein include one or more steps or actions for implementing these methods. These method steps and / or actions may be interchangeable without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions may be modified without departing from the scope of the claims.

[0192] As used herein, a phrase referring to "at least one of" a list of items refers to any combination of those items, including single members. For example, "at least one of a, b, or c" is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination with multiples of the same elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0193] As used herein, the term "determining" encompasses a wide variety of actions. For example, "determining" may include calculating, computing, processing, deriving, investigating, querying (e.g., searching in a table, database, or other data structure), ascertaining, and the like. Furthermore, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), and the like. Furthermore, "determining" may include resolving, selecting, choosing, establishing, and the like.

[0194] The foregoing description is provided so that any person skilled in the art can implement the various aspects described herein. For those skilled in the art, various modifications to these aspects will be apparent, and the overall principle defined herein can be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects shown herein, but to comply with the full scope consistent with the language of the claims, wherein, unless specifically stated otherwise, reference to an element in the singular is not intended to mean "one and only one", but may be "one or more". Unless otherwise specifically stated, the term "some" refers to one or more. All structural and functional equivalents of the elements of the various aspects described throughout this disclosure are expressly incorporated herein by reference, and are intended to be encompassed by the claims, and these structural and functional equivalents are well known or will be well known to those of ordinary skill in the art. In addition, anything disclosed herein is not intended to be dedicated to the public, regardless of whether such disclosure is clearly stated in the claims. No claim element is to be construed under 112(6) of the United States Patent Act unless the element is expressly recited using the phrase “means for” or, in the case of a method claim, the element is recited using the phrase “step for.”

[0195] The various operations of the methods described above may be performed by any suitable unit capable of performing the corresponding functions. These units may include various hardware and / or software components and / or modules, including but not limited to: circuits, application specific integrated circuits (ASICs), or processors. Generally, where operations are shown in the accompanying drawings, those operations may have corresponding paired functional unit components with similar numbering.

[0196] The various illustrative logic blocks, modules, and circuits described in conjunction with the present disclosure may be implemented or executed by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in combination with a DSP core, or any other such configuration.

[0197] If implemented in hardware, an example hardware configuration may include a processing system in a wireless node. The processing system may be implemented using a bus architecture. Depending on the specific application and overall design constraints of the processing system, the bus may include any number of interconnecting buses and bridges. The bus may link together various circuits including a processor, a machine-readable medium, and a bus interface. The bus interface may be used to connect a network adapter and other devices to the processing system via the bus. The network adapter may be used to implement signal processing functions at the physical layer. In a user terminal (see Figure 1 ), a user interface (e.g., keyboard, display, mouse, joystick, etc.) may also be connected to the bus. The bus may also link various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, etc., which are well known in the art and therefore will not be described any further. The processor may be implemented using one or more general-purpose processors and / or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuits capable of executing software. It will be appreciated by those skilled in the art how to best implement the described functionality for the processing system depending on the specific application and the overall design constraints imposed on the entire system.

[0198] If implemented in software, the functionality may be stored on a computer-readable medium or transmitted as one or more instructions or codes on the computer-readable medium. Software should be broadly interpreted to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or other terms. Computer-readable media includes both computer storage media and communication media, including any medium that facilitates the transfer of a computer program from one location to another. The processor may be responsible for managing the bus and general processing, including the execution of software stored on the machine-readable storage medium. The computer-readable storage medium may be coupled to the processor so that the processor can read information from and write information to the storage medium. Alternatively, the storage medium may be part of the processor. For example, the machine-readable medium may include a transmission line, a carrier waveform modulated with data, and / or a computer-readable storage medium with instructions stored thereon, separate from the wireless node, all of which can be accessed by the processor via a bus interface. Alternatively, or in addition, the machine-readable medium or any portion thereof may be integrated into the processor, such as with a cache and / or general register file. For example, examples of machine-readable storage media may include RAM (random access memory), flash memory, ROM (read-only memory), PROM (programmable read-only memory), EPROM (erasable programmable read-only memory), EEPROM (electrically erasable programmable read-only memory), registers, magnetic disks, optical disks, hard disks, or any other suitable storage media, or any combination thereof. Machine-readable media may be embodied in a computer program product.

[0199] A software module may include a single instruction or multiple instructions and may be distributed across several different code segments, across different programs, and across multiple storage media. A computer-readable medium may include multiple software modules. These software modules include instructions that, when executed by a device such as a processor, cause a processing system to perform various functions. A software module may include a sending module and a receiving module. Each software module may be located in a single storage device or distributed across multiple storage devices. For example, when a triggering event occurs, a software module may be loaded from a hard disk into RAM. During execution of a software module, the processor may load some of the instructions into a cache to increase access speed. Subsequently, one or more cache lines may be loaded into a general register file for execution by the processor. When referring to the functions of a software module below, it should be understood that such functions are implemented by the processor when executing instructions from that software module.

[0200] Furthermore, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared (IR), radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Optical disks, where magnetic disks typically reproduce data magnetically, and optical disks, which use lasers to reproduce data optically. Thus, in some aspects, computer-readable media may include non-transitory computer-readable media (e.g., tangible media). Furthermore, for other aspects, computer-readable media may include transitory computer-readable media (e.g., signals). Combinations of the above should also be included within the scope of computer-readable media.

[0201] Thus, certain aspects may include a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer-readable medium having stored thereon (and / or encoded thereon) instructions, the instructions being executable by one or more processors to perform the operations described herein (e.g., for performing the operations described herein and in Figure 20 and / or Figure 24 ).

[0202] In addition, it should be understood that the modules and / or other appropriate units for performing the methods and techniques described herein can be downloaded and / or otherwise obtained (if applicable) by a user terminal and / or base station. For example, such a device can be coupled to a server to facilitate the transmission of the units for performing the methods described herein. Alternatively, the various methods described herein can be provided via a storage unit (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or a floppy disk, etc.) so that the user terminal and / or base station can obtain the various methods when the storage unit is coupled to or provided to the device. In addition, any other appropriate technology for providing the methods and techniques described herein to a device can be utilized.

[0203] It is to be understood that the claims are not limited to the precise configuration and components shown above. Various modifications, changes and variations may be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

Claims

1. A method for wireless communication of a user equipment (UE), comprising: Receiving a channel state information (CSI) reporting configuration, where the CSI reporting configuration configures the UE with one or more CSI reference signal (CSI-RS) resources (CMRs) for channel measurement and one or more resources (IMRs) for interference measurement; determining a rank indicator (RI) pair, where the RI pair corresponds to one port group or two port groups of a CMR in the one or more CMRs; determining a one-to-one mapping between a codepoint of the RI pair and each of the one or more IMRs; as well as performing CSI measurement based on the determination, Wherein, determining the RI pair includes: determining that a first RI pair having a rank of zero among the RI pairs is associated with a first port group of a first CMR and at least one of: the first CSI-IM resource based on an order of the first CSI-IM resource in the CSI reporting configuration, or the first NZP-IMR set based on an order of the first NZP-IMR set in the CSI reporting configuration; and Determining that a second RI pair having a non-zero rank among the RI pairs is associated with two port groups of the first CMR and at least one of the following: the second CSI-IM resource based on an order of the second CSI-IM resource in the CSI reporting configuration, or the second NZP-IMR set based on an order of the second NZP-IMR set in the CSI reporting configuration.

2. The method according to claim 1, wherein The one or more IMRs include one or more CSI-RS resources CSI-IM for interference measurement.

3. The method according to claim 2, wherein: The one or more CSI-IMs include zero-power resources for interference measurement.

4. The method according to claim 1, wherein: The one or more IMRs include one or more non-zero power CSI-RS resources NZP-IMRs for interference measurement; The method further comprises: determining an NZP-IMR resource configuration for configuring more than one active NZP-IMR set, each NZP-IMR set comprising a plurality of NZP-IMRs; and A one-to-one mapping between the code points of the RI pairs and the active NZP-IMR sets is determined according to the order of the active NZP-IMR sets in the CSI reporting configuration.

5. The method according to claim 1, wherein Determining the one-to-one mapping includes: determining that a first codepoint is associated with a first port group and at least one of: the first CSI-IM resource based on an order of the first CSI-IM resource in the CSI reporting configuration, or the first NZP-IMR set based on an order of the first NZP-IMR set in the CSI reporting configuration; and Determining that a second codepoint is associated with a second port group and at least one of: the second CSI-IM resource based on an order of the second CSI-IM resource in the CSI reporting configuration, or the second NZP-IMR set based on an order of the second NZP-IMR set in the CSI reporting configuration.

6. The method according to claim 2, further comprising: It is determined that the one or more CSI-IM resources are quasi-co-located QCL with the port group or two port groups indicated by the RI pair.

7. The method according to claim 1, further comprising: Signaling is received from a network entity, the signaling configuring a mapping of RI pairs to port groups.

8. A method for wireless communication of a user equipment (UE), comprising: receiving a channel state information (CSI) reporting configuration, where the CSI reporting configuration configures the UE with a plurality of CSI reference signal (CSI-RS) resources (CMRs) for channel measurement; Determining a rank indicator (RI) pair, wherein a code point of the RI pair is associated with one port group of the CMR or two port groups of the CMR; Determining an association between the code point and one or two port groups of the CMR based on a network configuration or based on the number of port groups in the CMR; performing CSI measurement based on the association; and reporting the codepoints of the RI pair indicating one or two port groups of the selected CMR, Wherein, determining the RI pair includes: determining that a first RI pair having a rank of zero among the RI pairs is associated with a first port group of a first CMR; and It is determined that a second RI pair having a non-zero rank among the RI pairs is associated with two port groups of the first CMR.

9. The method according to claim 8, wherein Determining the association based on the number of port groups in the CMR includes: determining a first set of codepoints to be associated with a single port group of the CMR, wherein the number of codepoints in the first set of codepoints is equal to the number of port groups in the CMR; and A second set of codepoints is determined to be associated with two port groups of the CMR, wherein a number of codepoints in the second set of codepoints is equal to a total number of port group pairs among all port groups in the CMR.

10. The method according to claim 9, further comprising: receiving, from a network entity, an RI pair restriction that restricts a subset of the codepoints; performing CSI measurements on a port group or a port group pair associated with an unrestricted codepoint; as well as A codepoint from the unrestricted codepoints of the RI pair is reported.

11. The method according to claim 8, further comprising: receiving a plurality of codebook configurations; as well as An association between the plurality of codebook configurations and port groups in the CMR is determined based on a network configuration.

12. The method according to claim 11, wherein Each codebook in the plurality of codebooks includes at least one of: a number of ports, a type of CSI feedback, or a codebook subset restriction.

13. An apparatus for wireless communication, comprising: Memory; as well as At least one processor is coupled to the memory and configured to execute the method according to any one of claims 1-7.

14. An apparatus for wireless communication, comprising: Memory; as well as At least one processor is coupled to the memory and configured to execute the method according to any one of claims 8-12.

15. An apparatus for wireless communication, comprising: a unit for receiving a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration configures the apparatus with one or more CSI reference signal (CSI-RS) resources (CMRs) for channel measurement and one or more resources (IMRs) for interference measurement; a unit for determining a rank indicator (RI) pair, the RI pair corresponding to one port group or two port groups of CMRs in the one or more CMRs; means for determining a one-to-one mapping between a codepoint of the RI pair and each of the one or more IMRs; as well as means for performing CSI measurement based on the determination, The unit for determining the RI pair includes: means for determining that a first RI pair having a rank of zero among the RI pairs is associated with a first port group of a first CMR and at least one of: the first CSI-IM resource based on an order of the first CSI-IM resource in the CSI reporting configuration, or the first NZP-IMR set based on an order of the first NZP-IMR set in the CSI reporting configuration; and and means for determining that a second RI pair having a non-zero rank among the RI pairs is associated with two port groups of the first CMR and at least one of the following: the second CSI-IM resource based on an order of the second CSI-IM resource in the CSI reporting configuration, or the second NZP-IMR set based on an order of the second NZP-IMR set in the CSI reporting configuration.

16. An apparatus for wireless communication, comprising: a unit for receiving a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration configures the apparatus with a plurality of CSI reference signal (CSI-RS) resources (CMRs) for channel measurement; a unit for determining a rank indicator (RI) pair, wherein a code point of the RI pair is associated with one port group of a CMR or two port groups of a CMR; means for determining an association between the code point and one port group of the CMR or two port groups of the CMR based on a network configuration or based on the number of port groups in the CMR; means for performing CSI measurement based on the association; and means for reporting the codepoint of said RI pair indicating one or two port groups of a selected CMR, The unit for determining the RI pair includes: means for determining that a first RI pair having a rank of zero among the RI pairs is associated with a first port group of a first CMR; and means for determining that a second RI pair having a non-zero rank among the RI pairs is associated with two port groups of the first CMR.

17. A computer-readable medium having stored thereon computer-executable code for wireless communication, comprising: A code for receiving a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration configures a user equipment (UE) with one or more CSI reference signal (CSI-RS) resources (CMRs) for channel measurement and one or more resources (IMRs) for interference measurement; a code for determining a rank indicator (RI) pair corresponding to one or two port groups of a CMR in the one or more CMRs; code for determining a one-to-one mapping between a codepoint of the RI pair and each of the one or more IMRs; as well as code for performing CSI measurements based on the determination, The code for determining the RI pair includes: code for determining that a first RI pair having a rank of zero among the RI pairs is associated with a first port group of a first CMR and at least one of: the first CSI-IM resource based on an order of the first CSI-IM resource in the CSI reporting configuration, or the first NZP-IMR set based on an order of the first NZP-IMR set in the CSI reporting configuration; and and code for determining that a second RI pair having a non-zero rank among the RI pairs is associated with two port groups of the first CMR and at least one of the following: the second CSI-IM resource based on an order of the second CSI-IM resource in the CSI reporting configuration, or the second NZP-IMR set based on an order of the second NZP-IMR set in the CSI reporting configuration.

18. A computer-readable medium having stored thereon computer-executable code for wireless communication, comprising: A code for receiving a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration configures a user equipment (UE) with a plurality of CSI reference signal (CSI-RS) resources (CMRs) for channel measurement; A code for determining a rank indicator (RI) pair, wherein a code point of the RI pair is associated with one port group of a CMR or two port groups of a CMR; code for determining an association between the code point and a port group of the CMR or two port groups of the CMR based on a network configuration or based on the number of port groups in the CMR; code for performing CSI measurements based on the association; and A code for reporting the codepoint of said RI pair indicating one or two port groups of a selected CMR, The code for determining the RI pair includes: code for determining that a first RI pair of the RI pairs having a rank of zero is associated with a first port group of a first CMR; and Code for determining that a second RI pair having a non-zero rank among the RI pairs is associated with two port groups of the first CMR.

19. A method for wireless communication of a network entity, comprising: Configuring a user equipment UE with a channel state information CSI reporting configuration, wherein the CSI reporting configuration configures the UE with one or more CSI reference signal CSI-RS resources CMR for channel measurement and one or more resources IMR for interference measurement; determining a rank indicator (RI) pair, where the RI pair corresponds to one port group or two port groups of a CMR in the one or more CMRs; determining a one-to-one mapping between a codepoint of the RI pair and each of the one or more IMRs; as well as receiving a CSI report based on the determination, Wherein, determining the RI pair includes: determining that a first RI pair having a rank of zero among the RI pairs is associated with a first port group of a first CMR and at least one of: the first CSI-IM resource based on an order of the first CSI-IM resource in the CSI reporting configuration, or the first NZP-IMR set based on an order of the first NZP-IMR set in the CSI reporting configuration; and Determining that a second RI pair having a non-zero rank among the RI pairs is associated with two port groups of the first CMR and at least one of the following: the second CSI-IM resource based on an order of the second CSI-IM resource in the CSI reporting configuration, or the second NZP-IMR set based on an order of the second NZP-IMR set in the CSI reporting configuration.

20. The method according to claim 19, wherein The one or more IMRs include one or more CSI-RS resources CSI-IM for interference measurement.

21. The method according to claim 20, wherein The one or more CSI-IMs include zero-power resources for interference measurement.

22. The method of claim 19, wherein: The one or more IMRs include one or more non-zero power CSI-RS resources NZP-IMRs for interference measurement; The method further comprises: determining an NZP-IMR resource configuration for configuring more than one active NZP-IMR set, each NZP-IMR set comprising a plurality of NZP-IMRs; and A one-to-one mapping between the code points of the RI pairs and the active NZP-IMR sets is determined according to the order of the active NZP-IMR sets in the CSI reporting configuration.

23. The method according to claim 19, wherein Determining the one-to-one mapping includes: determining that a first codepoint is associated with a first port group and at least one of: the first CSI-IM resource based on an order of the first CSI-IM resource in the CSI reporting configuration, or the first NZP-IMR set based on an order of the first NZP-IMR set in the CSI reporting configuration; and Determining that a second codepoint is associated with a second port group and at least one of: the second CSI-IM resource based on an order of the second CSI-IM resource in the CSI reporting configuration, or the second NZP-IMR set based on an order of the second NZP-IMR set in the CSI reporting configuration.

24. The method of claim 20, further comprising: It is determined that the one or more CSI-IM resources are quasi-co-located QCL with the port group or two port groups indicated by the RI pair.

25. The method of claim 19, further comprising: Send signaling that configures a mapping of RI pairs to port groups.

26. A method for wireless communication of a network entity, comprising: Configuring a user equipment (UE) with a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration configures the UE with a plurality of CSI reference signal (CSI-RS) resources (CMRs) for channel measurement; Determining a rank indicator (RI) pair, wherein a code point of the RI pair is associated with one port group of the CMR or two port groups of the CMR; determining an association between the code point and a port group of a CMR or two port groups of a CMR, wherein the association is configured at the UE or is based on the number of port groups in the CMR; receiving a CSI report based on the association; and receiving a codepoint of said RI pair indicating one or two port groups of a selected CMR, Wherein, determining the RI pair includes: determining that a first RI pair having a rank of zero among the RI pairs is associated with a first port group of a first CMR; and It is determined that a second RI pair having a non-zero rank among the RI pairs is associated with two port groups of the first CMR.

27. The method according to claim 26, wherein Determining the association based on the number of port groups in the CMR includes: determining a first set of codepoints to be associated with a single port group of the CMR, wherein the number of codepoints in the first set of codepoints is equal to the number of port groups in the CMR; and A second set of codepoints is determined to be associated with two port groups of the CMR, wherein a number of codepoints in the second set of codepoints is equal to a total number of port group pairs among all port groups in the CMR.

28. The method according to claim 27, further comprising: sending, to the UE, an RI pair restriction that restricts the subset of codepoints; as well as A codepoint from the unrestricted codepoints of the RI pair is received.

29. The method of claim 26, further comprising: providing a plurality of codebook configurations to the UE; as well as An association between the plurality of codebook configurations and port groups in the CMR is determined based on a network configuration.

30. The method according to claim 29, wherein Each codebook in the plurality of codebooks includes at least one of: a number of ports, a type of CSI feedback, or a codebook subset restriction.

31. An apparatus for wireless communication, comprising: Memory; as well as At least one processor coupled to the memory and configured to execute the method according to any one of claims 19-25.

32. An apparatus for wireless communication, comprising: Memory; as well as At least one processor is coupled to the memory and configured to execute the method according to any one of claims 26-30.

33. An apparatus for wireless communication, comprising: a unit configured to configure a user equipment (UE) with a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration configures the UE with one or more CSI reference signal (CSI-RS) resources (CMRs) for channel measurement and one or more resources (IMRs) for interference measurement; a unit for determining a rank indicator (RI) pair, the RI pair corresponding to one port group or two port groups of CMRs in the one or more CMRs; means for determining a one-to-one mapping between a codepoint of the RI pair and each of the one or more IMRs; as well as means for receiving a CSI report based on the determination, The unit for determining the RI pair includes: means for determining that a first RI pair having a rank of zero among the RI pairs is associated with a first port group of a first CMR and at least one of: the first CSI-IM resource based on an order of the first CSI-IM resource in the CSI reporting configuration, or the first NZP-IMR set based on an order of the first NZP-IMR set in the CSI reporting configuration; and and means for determining that a second RI pair having a non-zero rank among the RI pairs is associated with two port groups of the first CMR and at least one of the following: the second CSI-IM resource based on an order of the second CSI-IM resource in the CSI reporting configuration, or the second NZP-IMR set based on an order of the second NZP-IMR set in the CSI reporting configuration.

34. An apparatus for wireless communication, comprising: a unit configured to configure a user equipment (UE) with a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration configures the UE with a plurality of CSI reference signal (CSI-RS) resources (CMRs) for channel measurement; a unit for determining a rank indicator (RI) pair, wherein a code point of the RI pair is associated with one port group of a CMR or two port groups of a CMR; means for determining an association between the code point and one port group of the CMR or two port groups of the CMR, wherein the association is configured at the UE or is based on the number of port groups in the CMR; means for receiving a CSI report based on the association; and means for receiving a code point indicating said RI pair of one or two port groups of a selected CMR, The unit for determining the RI pair includes: means for determining that a first RI pair having a rank of zero among the RI pairs is associated with a first port group of a first CMR; and means for determining that a second RI pair having a non-zero rank among the RI pairs is associated with two port groups of the first CMR.

35. A computer-readable medium having stored thereon computer-executable code for wireless communication, comprising: A code for configuring a user equipment (UE) with a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration configures the UE with one or more CSI reference signal (CSI-RS) resources (CMRs) for channel measurement and one or more resources (IMRs) for interference measurement; a code for determining a rank indicator (RI) pair corresponding to one or two port groups of a CMR in the one or more CMRs; code for determining a one-to-one mapping between a codepoint of the RI pair and each of the one or more IMRs; as well as code for receiving a CSI report based on the determination, The code for determining the RI pair includes: code for determining that a first RI pair having a rank of zero among the RI pairs is associated with a first port group of a first CMR and at least one of: the first CSI-IM resource based on an order of the first CSI-IM resource in the CSI reporting configuration, or the first NZP-IMR set based on an order of the first NZP-IMR set in the CSI reporting configuration; and and code for determining that a second RI pair having a non-zero rank among the RI pairs is associated with two port groups of the first CMR and at least one of the following: the second CSI-IM resource based on an order of the second CSI-IM resource in the CSI reporting configuration, or the second NZP-IMR set based on an order of the second NZP-IMR set in the CSI reporting configuration.

36. A computer-readable medium having stored thereon computer-executable code for wireless communication, comprising: A code for configuring a user equipment (UE) with a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration configures the UE with a plurality of CSI reference signal (CSI-RS) resources (CMRs) for channel measurement; A code for determining a rank indicator (RI) pair, wherein a code point of the RI pair is associated with one port group of a CMR or two port groups of a CMR; code for determining an association between the codepoint and a port group of a CMR or two port groups of a CMR, wherein the association is configured at the UE or is based on the number of port groups in the CMR; code for receiving a CSI report based on the association; and a code for receiving a codepoint indicating said RI pair of one or two port groups of a selected CMR, The code for determining the RI pair includes: code for determining that a first RI pair of the RI pairs having a rank of zero is associated with a first port group of a first CMR; and Code for determining that a second RI pair having a non-zero rank among the RI pairs is associated with two port groups of the first CMR.

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