Channel state information (CSI) reporting for coherent joint transmission (CJT)
By introducing new mechanisms for linking SRS and CSI-RS resources and CJT CSI reports, the challenges of phase misalignment measurement and CJT calibration are addressed, enhancing CJT CSI reporting accuracy and improving data transmission performance in 5G networks.
Patent Information
- Application Number
- PCT/CN2024/105292
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2026-01-15
AI Technical Summary
Current wireless communication technologies face challenges in accurately linking sounding reference signals (SRS) and CSI-RS for phase misalignment measurement, and in linking CJT calibration CSI reports with CJT CSI reports, which leads to performance degradation in coherent joint transmission (CJT) due to inter-TRP delay/frequency/phase misalignments.
Introduce new mechanisms for linking SRS and CSI-RS for phase misalignment measurement, and for linking CJT calibration CSI reports with CJT CSI reports, including specific configurations and associations between SRS and CSI-RS resources, and CSI reporting settings to account for delay/frequency/phase misalignments in CJT CSI calculations.
Enhances the accuracy of CJT CSI reporting by compensating for inter-TRP misalignments, thereby improving data transmission performance for cell-edge user equipment in 5G networks.
Smart Images

Figure CN2024105292_15012026_PF_FP_ABST
Abstract
Description
CHANNEL STATE INFORMATION (CSI) REPORTING FOR COHERENT JOINT TRANSMISSION (CJT)TECHNICAL FIELD
[0001] This document is directed generally to digital wireless communications.BACKGROUND
[0002] Mobile telecommunication technologies are moving the world toward an increasingly connected and networked society. In comparison with the existing wireless networks, next generation systems and wireless communication techniques will need to support a much wider range of use-case characteristics and provide a more complex and sophisticated range of access requirements and flexibilities.
[0003] Long-Term Evolution (LTE) is a standard for wireless communication for mobile devices and data terminals developed by 3rd Generation Partnership Project (3GPP) . LTE Advanced (LTE-A) is a wireless communication standard that enhances the LTE standard. The 5th generation of wireless system, known as 5G, advances the LTE and LTE-Awireless standards and is committed to supporting higher data-rates, large number of connections, ultra-low latency, high reliability and other emerging business needs.SUMMARY
[0004] Techniques are disclosed for CJT (coherent joint transmission) calibration CSI (channel state information) reporting. More specifically, this document provides example methods for linking the sounding reference signal (SRS) and CSI-RS (CSI reference signal) for phase misalignment information measurement, linking the CJT calibration CSI report and the CJT CSI report, and for RI (rank indicator) / PMI (precoding matrix indicator) / CQI (channel quality indicator) calculation assumptions for the CJT CSI report.
[0005] In one exemplary aspect, a method of wireless communication performed at a wireless device (e.g., a user equipment (UE) ) is disclosed. The method includes receiving a channel state information (CSI) reporting configuration signaling. The CSI reporting configuration signaling may be received at the UE from a network device. The CSI reporting configuration signaling is associated with at least one of a reference signal (RS) resource or a reference signal resource set. The method further includes determining a CSI according to the CSI reporting configuration signaling. The CSI includes at least one of: a CSI-RS resource indicator (CRI) , a rank indicator (RI) , a precoding matrix indicator (PMI) , a channel quality indicator (CQI) , a delay misalignment information, a frequency misalignment information, or a phase misalignment information. The method further includes reporting the CSI to a network device.
[0006] In another exemplary aspect, a method of wireless communication performed at a network device (e.g., a base station (BS) , a network node) is disclosed. The method includes transmitting a CSI reporting configuration signaling. The CSI reporting configuration signaling may be transmitted by the network device to a wireless device (e.g., a UE) . The CSI reporting configuration signaling may be associated with at least one of a RS or a RS resource set. The method further includes receiving, at the network device, a CSI from the wireless device. The CSI is determined according to the CSI reporting configuration signaling and includes at least one of: a CSI-RS resource indicator (CRI) , a rank indicator (RI) , a precoding matrix indicator (PMI) , a channel quality indicator (CQI) , a delay misalignment information, a frequency misalignment information, or a phase misalignment information.
[0007] In yet another exemplary aspect, the above-described methods are embodied in the form of processor-executable code and stored in a non-transitory computer-readable storage medium. The code included in the computer readable storage medium when executed by at least one processor, causes a wireless device to implement the methods described in this patent document.
[0008] In yet another exemplary embodiment, a device that is configured or operable to perform the above-described methods is disclosed.
[0009] The above and other aspects and their implementations are described in greater detail in the drawings, the descriptions, and the claims.
[0010] BRIEF DESCRIPTION OF THE DRAWING
[0011] FIG. 1 is a diagram illustrating example processes for measuring and / or reporting CSI.
[0012] FIG. 2 is a diagram illustrating example processes for measuring and / or reporting CSI.
[0013] FIG. 3 shows an exemplary flowchart for measuring and / or reporting CSI.
[0014] FIG. 4 shows an exemplary flowchart for measuring and / or reporting CSI.
[0015] FIG. 5 shows an exemplary block diagram of a hardware platform that may be a part of a network device or a communication device.
[0016] FIG. 6 shows an example of wireless communication including a base station (BS) and user equipment (UE) based on some implementations of the disclosed technology.DETAILED DESCRIPTION
[0017] The example headings for the various sections below are used to facilitate the understanding of the disclosed subject matter and do not limit the scope of the claimed subject matter in any way. Accordingly, one or more features of one example section can be combined with one or more features of another example section. Furthermore, 5G terminology is used for the sake of clarity of explanation, but the techniques disclosed in the present document are not limited to 5G technology only, and may be used in wireless systems that implemented other protocols.
[0018] Initial Discussion
[0019] M-TRP (multiple transmission reception point) coherent joint transmission (CJT) is a key technology to improve the data transmission performance for cell-edge user equipment UEs. In FDD (frequency division duplexing) mode, the inter-TRP (transmission-reception point) delay / frequency misalignment would cause strong frequency / temporal selectivity and significant performance degradation. In TDD (time division duplexing) mode, the inter-TRP UL / DL (uplink / downlink) phase misalignment would break the reciprocity assumption and also cause significant performance degradation. To ensure the CJT performance, Rel-19 introduces the UE-assisted CJT calibration, where UE measures the delay / frequency / phase misalignment via DL RS (or UL RS in addition) and reports the calibration information to gNB.
[0020] The inter-TRP UL / DL phase misalignment is measured via both UL SRS (s) (uplink sounding reference signals) and DL CSI-RS (s) (downlink channel state information reference signals) . To ensure that the symmetric UL / DL channel can be canceled out, the SRS (s) and CSI-RS(s) should be transmitted and received using the same antenna port (s) . Then the SRS (s) and CSI-RS (s) involved in the measurement should be linked, and the linkage information should be informed to the UE.
[0021] Besides, after gNB acquiring the inter-TRP delay / frequency misalignment information, the information would be used to compensate the delay / frequency misalignment in later CJT PDSCH (physical downlink shared channel) transmission. However, in CJT CSI (including RI (rank indicator) / PMI (precoding matrix indicator) / CQI (channel quality indicator) ) acquisition, the delay / frequency misalignment is not pre-compensated for the CSI-RS (s) for channel measurement to avoid UE-specific CSI-RS (s) (which may cause unacceptable CSI-RS overhead) . Therefore, the CJT calibration CSI report (which may include at least one of delay / frequency / phase misalignment information) needs to be linked with the CJT CSI report (which may include at least one of CRI (CSI-RS resource indicator) / RI / PMI / CQI) , so that the UE can take the delay / frequency misalignment information into account in CJT CSI calculation and derive accurate PMI / CQI for CJT PDSCH (physical downlink shared channel) transmission.
[0022] Currently, available technical implementations make it unclear how to link the SRS (s) and CSI-RS (s) for phase misalignment measurement and how to link the CJT calibration CSI report and the CJT CSI report. To address the above problems and other challenges, the present document discloses solutions for (i) linkage between CSI-RS and SRS for phase misalignment measurement, (ii) linkage between CJT calibration CSI report and CJT CSI report, and (iii) CJT PMI / CQI calculation assumption.
[0023] Embodiment 0 and General Overview
[0024] Based on current NR standards, the linkage between SRS and CSI-RS is supported for non-codebook-based UL transmission. An SRS resource set configured with usage ‘nonCodebook’ can be associated with a CSI-RS. However, this kind of linkage is NOT supported for CSI acquisition. New SRS and CSI-RS linkage mechanism needs to be introduced for CSI report configuration.
[0025] In current NR (New Radio) standards, the linkage between two types of CSI reports is NOT supported. New mechanisms are needed to support linking the CJT calibration CSI report and CJT CSI report.
[0026] In this document,
[0027] ‘UE’ may be an example embodiment of a wireless communication device;
[0028] ‘gNB’ may be an example embodiment of a Base Station (BS) , wireless network device, network node or TRP;
[0029] ‘Time unit’ may include sub-symbol, symbol, slot, sub-frame, frame, or transmission occasion;
[0030] ‘frequency unit’ may include subcarrier spacing, RB (resource block) , RG (resource block group) , PRG (physical resource block group) , subband;
[0031] ‘Higher layer parameter’ may include parameter, Radio Resource Control (RRC) parameter, Radio Resource Management (RRM) parameter, Radio Resource Arrangement (RRA) parameter, Downlink Control Information (DCI) , or Physical Down-link Control Channel (PDCCH) ;
[0032] ‘Delay misalignment’ may be referred to or understood as inter-TRP delay misalignment, UL / DL inter-TRP delay misalignment, delay offset (DO) , inter-TRP DO, UL / DL inter-TRP DO;
[0033] ‘Frequency misalignment’ may be referred to or understood as inter-TRP frequency misalignment, UL / DL inter-TRP frequency misalignment, frequency offset (FO) , inter-TRP FO, UL / DL inter-TRP FO;
[0034] ‘Phase misalignment’ may be referred to or understood as inter-TRP phase misalignment, UL / DL inter-TRP phase misalignment, inter-TRP phase, UL / DL inter-TRP phase, phase offset (PO) , inter-TRP PO, UL / DL inter-TRP PO.
[0035] may be referred to or understood as ceil operator.
[0036] CJT calibration CSI reports and CJT CSI reports are types of CSI reports. The CJT calibration CSI report may include at least one of delay / frequency / phase misalignment information. The CJT CSI report may include at least one of CRI / RI / PMI / CQI for CJT. The general procedure of CSI reporting is as follows:
[0037] - UE receives at least one of: a CSI reporting configuration signaling, where the configuration signaling may be associated with one or more reference signal (s) (RS) , or one or more set (s) of RSs;
[0038] - The UE determines a CSI based on the CSI reporting configuration signaling and / or the RS (s) . In some embodiments, the CSI can include at least one of: a CSI-RS resource indicator (CRI) , a rank indicator (RI) , a precoding matrix indicator (PMI) , a channel quality indicator (CQI) . In some embodiments, the CSI can include at least one of: delay information, frequency information, or phase information.
[0039] - The UE reports the CSI to gNB.
[0040] Embodiment 1
[0041] Embodiments disclosed in this section relate to the linkage between SRS and CSI-RS for phase misalignment measurement.
[0042] There can be two possible kinds of implementations for phase misalignment measurement: In implementation-1, the UE transmits SRS before receiving CSI-RS, or the SRS and CSI-RS are triggered by a same DCI / time instant; in implementation-2, the UE transmits SRS after receiving CSI-RS. Generally, in implementation-1, the later (or simultaneous) CSI-RS (and associated CSI report) needs to be linked to the earlier SRS. Generally, in implementation-2, the later SRS needs to be linked to the earlier CSI-RS (and associated CSI report) .
[0043] I. Implementation-1
[0044] For implementation-1, there can be further two possible modes: In mode-A, non-precoded CSI-RS is used for phase misalignment measurement; In mode-B, ‘precoded’ CSI-RS is used for phase misalignment measurement. Hereinafter, ‘precoded’ may indicate that the CSI-RS is processed based on the conjugate channel response derived from the associated SRS. For example, whether or not the CSI-RS is precoded or non-precoded may inform an association between the CSI-RS and SRSs. Figure 1 illustrates example processes for phase misalignment measurements under mode-A (110) and mode-B (120) under implementation-1. In the example processes, the number of TRPs (NTRP) is two (including TRP1 104-1 and TRP2 104-2) . Depending on the example, TRP1 104-1 and TRP2 104-2 may be located at the same gNB or at different gNBs.
[0045] I. A. Implementation-1 Mode-A
[0046] An example procedure of phase misalignment measurement is as follows:
[0047] - The UE 102 transmits RSRS SRS resource (s) to NTRP TRPs (e.g., TRP1 104-1, TRP2 104-2) , each SRS resource includes PSRS SRS port (s) . (RSRS≥1, PSRS≥1) .
[0048] - The gNB measures the channels corresponding to the PSRS·RSRS SRS port (s) to determine uplink (UL) phase misalignment information. The gNB may further select m SRS ports out of the PSRS·RSRS SRS port (s) and inform UE 102 the selected SRS ports. (PSRS·
[0049] RSRS≥m≥1) .
[0050] - Each TRP transmits a “non-precoded” PCSI-RS-port CSI-RS to the UE 102. The gNB may further select n CSI-RS port (s) out of PCSI-RS CSI-RS port (s) for each CSI-RS resource, and inform UE 102 the selected CSI-RS ports. (PCSI-RS≥1, PCSI-RS≥n≥1) .
[0051] -The UE 102 receives each of the n or PCSI-RS CSI-RS port for each of the CSI-RS resource using the antenna port (s) used to transmit the m or PSRS·RSRS SRS ports.
[0052] -The UE 102 measures and reports 1 or j·k set (s) of phase misalignment information (e.g., at least DL phase information) . In some embodiments, each set of DL phase misalignment information may include NTRP-1 DL phase offset (s) . (m≥j≥1 or PSRS·RSRS≥j≥1; n≥k≥1 or PCSI-RS≥k≥1) .
[0053] I. B. Implementation-1 Mode-B
[0054] An example procedure of phase misalignment measurement is as follows:
[0055] - The UE 102 transmits RSRS SRS resource (s) to NTRP TRPs, each SRS resource includes PSRS SRS port (s) . (RSRS≥1, PSRS≥1) .
[0056] - The gNB measures the channels corresponding to the PSRS·RSRS SRS port (s) . The gNB may further select m SRS ports out of the PSRS·RSRS SRS port (s) and inform UE the selected SRS ports. (PSRS·RSRS≥m≥1) .
[0057] - Each TRP transmits a ‘precoded’ PCSI-RS-port CSI-RS to the UE. (PCSI-RS=n·mor PCSI-RS=n·PSRS·RSRS, where n≥1) . Each of the m or PSRS·RSRS SRS port (s) is associated with n CSI-RS port (s) . Each CSI-RS port is ‘precoded’a ccording to the conjugation of the channel response corresponding to the associated SRS port.
[0058] - The UE receives each CSI-RS port using the antenna port (s) used to transmit the associated SRS port.
[0059] - The UE measures and reports 1 or j·k set (s) of phase misalignment information (e.g., one or both of downlink phase information and uplink phase information) . Each set of phase misalignment information may include NTRP-1 phase offset (s) . (m≥j≥1 or PSRS·RSRS≥j≥1; n≥k≥1) .
[0060] I. C. Implementation-1 Linkage between SRS and CSI-RS
[0061] For implementation-1, the linkage between former SRS and later CSI-RS can be achieved by the following methods:
[0062] I. C. (i) . CSI Reporting Configuration Signaling
[0063] The CSI reporting configuration signaling from the gNB can include an CSI reporting setting parameter and a trigger state parameter. Depending on the embodiment, the CSI reporting setting can be associated with at least one of: (i) one SRS resource set, (ii) one or multiple of SRS resource sets, (iii) one CSI-RS resource set, or (iv) one or multiple CSI-RS resource sets.
[0064] One SRS resource set
[0065] In some embodiments, a CSI reporting setting can be associated with one SRS resource set configured with usage “antenna switching, ” where the SRS resource set can be associated with RSRS≥1 SRS resource (s) and each SRS resource is configured with PSRS≥1 SRS ports.
[0066] In such embodiments, a trigger state can be associated with the CSI reporting setting and associated with m≥1 SRS ports out of the PSRS·RSRS SRS ports. For example, the trigger state can be associated with an SRS resource set ID, one or more SRS resource ID associated with the SRS resource set ID, and one or more SRS port ID associated with each SRS resource ID.For example, the trigger state can be associated with an indicator indicating m SRS ports out of the PSRS·RSRS SRS ports, where the indicator can be m indices, a combinatorial number, or a bitmap. The combinatorial number or the bit map can indicate one or more SRS resources out of the PSRS SRS resources, or one or more SRS ports out of the PSRS·RSRS SRS ports. The bit width of each of the m indices can be The bit width of the combinatorial number can be The bit width of the bitmap can be PSRS·RSRS, where the i-th bit in the bitmap is associated with the i-th SRS port of the PSRS·RSRS SRS ports, where the PSRS·RSRS SRS ports can be indexed firstly based on an ascending / descending order of SRS resource ID and secondly based on an ascending / descending order of SRS port ID within each SRS resource.
[0067] One or multiple SRS resource set (s)
[0068] In some embodiments, a CSI reporting setting can be associated with one or multiple SRS resource set (s) configured with usage “antenna switching, ” where the i-th SRS resource set can be associated with RSRS, i SRS resource (s) and each SRS resource is configured with PSRS, i SRS ports. In such embodiments, a trigger state can be associated with the CSI reporting setting and one of the SRS resource sets. If the trigger state is associated with the i-th SRS resource set, it is associated with all the PSRS, i·RSRS, i SRS ports in the SRS resource set. The trigger state can be associated with an SRS resource set ID.
[0069] One CSI-RS resource set
[0070] In some embodiments, a CSI reporting setting can be associated with one CSI-RS resource set, where the CSI-RS resource set can be associated with RCSI-RS (RCSI-RS may equal to the number of TRPs NTRP) PCSI-RS-port (PCSI-RS≥1) CSI-RS resource (s) . PCSI-RS, i can be equal to n or nm (n≥1) .
[0071] In such embodiments, a trigger state can be associated with the CSI reporting setting and associated with n or nm (n≥1) CSI-RS port (s) out of the PCSI-RS CSI-RS ports for each of the RCSI-RS CSI-RS resources. For example, the trigger state can be associated with one CSI-RS resource set ID, and one or more CSI-RS port ID for each of the CSI-RS resource in the CSI-RS resource set. For example, the trigger state can be associated with an indicator indicating n or nm CSI-RS port (s) out of PCSI-RS CSI-RS port (s) for each / all CSI-RS resource (s) in the associated CSI-RS resource set, where the indicator can be n or nm indices, a combinatorial number, or a bitmap. The bit width of each of the n or nm indices can be The bit width of the combinatorial number can be or The bit width of the bitmap can be PCSI-RS, where the i-th bit in the bitmap is associated with the i-th CSI-RS port of the PCSI-RS CSI-RS port (s) for each / all CSI-RS resource (s) in the associated CSI-RS resource set.
[0072] One or multiple CSI-RS resource set (s)
[0073] In some embodiments, a CSI reporting setting can be associated with one or multiple CSI-RS resource set (s) , where the i-th CSI-RS resource set can be associated with RCSI-RSPCSI-RS, i-port (PCSI-RS, i) CSI-RS resource (s) . In such embodiments, a trigger state can be associated with the CSI reporting setting and associated with one of the CSI-RS resource sets. If the trigger state is associated with the i-th CSI-RS resource set, it is associated with all the -PCSI-RS, i CSI-RS port (s) for each CSI-RS resource within the i-th CSI-RS resource set. PCSI-RS, i can be equal to n or nm.
[0074] I. C. (ii) . Association between SRS ports with CSI-RS ports
[0075] Generally, for a CSI reporting setting or a trigger state associated with one or more CSI-RS port (s) for one or more CSI-RS resources and one or more SRS port (s) , each of the SRS port (s) can be associated with one or more or all of the CSI-RS port (s) for each of the CSI-RS resources. A UE should receive each CSI-RS port for each CSI-RS resource using the antenna port used to transmit the associated SRS port.
[0076] For example, if a trigger state is associated with mn CSI-RS port (s) for RCSI-RS CSI-RS resources and m SRS port (s) , each of the m SRS port (s) can be associated with n CSI-RS port (s) for each of the RCSI-RS CSI-RS resources. The i-th SRS port among the m SRS port (s) can be associated with the [ (i-1) n+1] -th to in-th CSI-RS port (s) for each of the RCSI-RS CSI- RS resources. The SRS port (s) can be indexed firstly based on an ascending / descending order of SRS resource ID, and secondly based on an ascending / descending order of SRS port ID within each SRS resource. The CSI-RS port (s) can be indexed based on an ascending / descending order of CSI-RS ports within each CSI-RS resource.
[0077] For example, a CSI reporting setting may be associated with a CSI-RS resource set and an SRS resource set. In such examples, the CSI-RS resource set includes RCSI-RS CSI-RS resources, and each CSI-RS resource is configured with PCSI-RS CSI-RS ports. Further, in such examples, the SRS resource set includes RSRS SRS resources, each SRS resource is configured with PSRS SRS ports, and PCSI-RS=n·PSRS·RSRS. The i-th SRS port among the PSRS·RSRS SRS port (s) can be associated with the [ (i-1) n+1] -th to in-th CSI-RS port (s) for each of the RCSI-RS CSI-RS resources. The SRS port (s) can be indexed firstly based on an ascending / descending order of SRS resource ID, and secondly based on an ascending / descending order of SRS port ID within each SRS resource. The CSI-RS port (s) can be indexed based on an ascending / descending order of CSI-RS ports within each CSI-RS resource.
[0078] The CSI reporting setting or the trigger state can include at least one of: an indicator of whether there exists one-to-one or one-to-multiple mapping relationship between the SRS ports and CSI-RS ports associated with the CSI reporting setting or the trigger state, an indicator of whether the CSI-RS ports associated with the CSI reporting setting or the trigger state is ‘precoded’ or ‘processed’ based on the SRS ports associated with the CSI reporting or the trigger state.
[0079] I. C. (iii) . Phase Misalignment Information Included in CSI Report
[0080] In some embodiments, the CSI report may include 1 or j·k set (s) of phase misalignment information, where each set of phase misalignment information may include NTRP-1 phase offset (s) .
[0081] The number of sets of phase misalignment information, or at least one of j and k, may be a fixed value (e.g., 1) , or indicated via RRC or included in the CSI report.
[0082] Each set of phase misalignment information may be associated with at least one of the SRS port (s) and / or one of the CSI-RS port (s) associated with the CSI reporting setting or the trigger state.
[0083] The CSI report may include an indicator of at least one of the SRS port (s) and / or the CSI-RS port (s) associated with the set (s) of phase misalignment information. For example, the indicator can be at least one of: j SRS port indices, k CSI-RS port indices, a combinatorial number indicating the associated SRS / CSI-RS ports, or a bitmap indicating the associated SRS / CSI-RS ports.
[0084] If the number of set (s) of phase misalignment information is greater than 1, these sets can be ordered according to at least one of the associated SRS port indices and the associated CSI-RS port indices in the report.
[0085] For example, the sets of phase misalignment information can be firstly ordered based on an ascending / descending order of the associated SRS port indices, and secondly based on an ascending / descending order of the associated CSI-RS port indices.
[0086] For example, the sets of phase misalignment information can be firstly ordered based on an ascending / descending order of the associated SRS port indices, and secondly based on an ascending / descending order of the associated CSI-RS port indices.
[0087] For example, the sets of phase misalignment information can be ordered based on the reporting order of the associated SRS and / or CSI-RS port (s) in the CSI report. For example, the CSI report includes j·k indicators of j·k (combinations of) SRS and / or CSI-RS port (s) , respectively. The set (s) of phase misalignment information are ordered based on the reporting order of the associated (combination of) SRS and / or CSI-RS port (s) , i.e., the i-th set of phase misalignment information is associated with the i-th (combination of) SRS and CSI-RS port (s) .
[0088] I. C. (iv) . CSI Report Triggering and Timing
[0089] When a DCI indicates a trigger state associated with a CSI reporting setting, one or more aperiodic CSI-RS (one or more CSI-RS resource set associated with an aperiodic CSI-RS resource setting, or one or more CSI-RS resources in a CSI-RS resource set associated with an aperiodic CSI-RS resource setting) , and one or more aperiodic SRS (one or more aperiodic SRS resource set, or one or more SRS resources in an aperiodic SRS resource set) , the DCI triggers the aperiodic CSI report, the aperiodic CSI-RS, and the aperiodic SRS simultaneously.
[0090] When the CSI report is triggered by a DCI indicating a trigger state, and where the trigger state is associated with one or more SRS resource (s) and one or more CSI-RS resource (s) (or where the trigger state is associated with a CSI reporting setting and the CSI reporting setting is associated with one or more SRS resource (s) and one or more CSI-RS resource (s) ) , the CSI report or the trigger state is associated with the last transmission occasion (s) of the associated SRS resource (s) no later than a first time instant or the first transmission occasion (s) of the associated SRS resource (s) no earlier than a second time instant. In some embodiments, the first time instant can be determined by at least one of: the DCI / OFDM symbol / time instant triggering the CSI report, the numerology of the PDCCH carrying the DCI μDL, the numerology of the PUCCH / PUSCH carrying the CSI report / SRS μUL, a first time length L1, or a UE capability. For example, the first time instant can be the time instant when the DCI triggers the CSI report. In some embodiments, the second time instant can be determined by at least one of: the last symbol of the PUCCH / PUSCH carrying the CSI report, a second time length L2, or a second UE capability. For example, the second time instant can be the last symbol of the PUCCH / PUSCH carrying the CSI report.
[0091] When the CSI report is triggered by a DCI indicating a trigger state, and where the trigger state is associated with one or more SRS resource (s) and one or more CSI-RS resource (s) (or where the trigger state is associated with a CSI reporting setting and the CSI reporting setting is associated with one or more SRS resource (s) and one or more CSI-RS resource (s) ) , the UE only reports a (valid) CSI report when there exists at least one transmission occasion of each of the associated SRS (s) no earlier than a first time instant and / or no later than a second time instant, and the UE drops the CSI report otherwise. In some embodiments, the first or second time instant can be determined by at least one of: the DCI / time instant / OFDM symbol triggering the CSI report, the numerology of the PDCCH carrying the DCI μDL, or the numerology of the PUCCH / PUSCH carrying the CSI report / SRS μUL, a first / second time length L1 / L2, a first / second UE capability. For example, the first / second time instant can be L1 / L2 before the DCI / OFDM symbol / time instant triggering the CSI report. For example, the first / second time length L1 / L2 can be a predefined value, e.g., 20ms, 40ms, 20 slots, 40 slots, or a reported UE capability.
[0092] When the CSI report is triggered by a DCI indicating a trigger state, and where the trigger state is associated with one or more SRS resource (s) and one or more periodic / semi-persistent CSI-RS resource (s) (or where the trigger state is associated with a CSI reporting setting and the CSI reporting setting is associated with one or more SRS resource (s) and one or more periodic / semi-persistent CSI-RS resource (s) ) , (i.e., the associated CSI-RS resources are included in a CSI-RS resource set associated with an periodic / semi-persistent CSI-RS resource setting) , the UE can expect that the periodic / semi-persistent CSI-RS resource (s) are transmitted no earlier than a time length L after the DCI / time instant / OFDM symbol triggering the CSI report. The time length L can be a predefined value, e.g., 2ms, 4ms, 2 slot, 4 slots, 28 OFDM symbols, 56 OFDM symbols or a reported UE capability.
[0093] When the CSI report is triggered by a DCI indicating a trigger state, and where the trigger state is associated with one or more SRS resource (s) and one or more aperiodic CSI-RS resource (s) (or where the trigger state is associated with a CSI reporting setting and the CSI reporting setting is associated with one or more SRS resource (s) and one or more aperiodic CSI-RS resource (s) ) (i.e., the associated CSI-RS resources are included in a CSI-RS resource set associated with an aperiodic CSI resource setting) , the UE expects that the aperiodic triggering offset of the aperiodic CSI-RS resource (s) or the aperiodic CSI-RS resource set is no smaller than a threshold value X. The threshold value X can a predefined value, e.g., 2 slots, 4 slots, or a reported UE capability.
[0094] According the 38.214 standards, whether the UE shall provide a valid CSI report is determined by a pair of parameters Z / Z’ :
[0095] When the CSI request field on a DCI triggers a CSI report (s) on PUSCH, the UE shall provide a valid CSI report for the n-th triggered report:
[0096] - if the first uplink symbol to carry the corresponding CSI report (s) including the effect of the timing advance, starts no earlier than at symbol Zref, and
[0097] - if the first uplink symbol to carry the n-th CSI report including the effect of the timing advance, starts no earlier than at symbol Z'ref (n) ,
[0098] where Zref is defined as the next uplink symbol with its CP starting Tproc, CSI=(Z) (2048+144) ·κ2-μ·TC+Tswitch after the end of the last symbol of the PDCCH triggering the CSI report (s) , and where Z'ref (n) , is defined as the next uplink symbol with its CP starting T′proc, CSI= (Z′) (2048+144) ·κ2-μ·TC after the end of the last symbol in time of the latest of: aperiodic CSI-RS resource for channel measurements, aperiodic CSI-IM used for interference measurements, and aperiodic NZP CSI-RS for interference measurement for a CSI-ReportConfig, or for all triggered sub-configurations if CSI-ReportConfig comprises multiple sub-configurations, when aperiodic CSI-RS is used for channel measurement for the n-th triggered CSI report, and where Tswitch is defined in clause 6.4 and is applied only if Z1 of table 5.4-1 is applied.
[0099] In some embodiments, when the CSI report is triggered by a DCI indicating a trigger state, and the trigger state is associated with one or more SRS resource (s) and one or more CSI- RS resource (s) , the Z / Z’ can be determined by at least one of: Z2 / Z2’ defined in Table 5.4-2 of TS 38.214 and a value Y. Z can be determined by at least one of: Y Z2, Z2+Y. Y can be a predefined value, e.g. 14, 28, or a reported UE capability.
[0100] I. C. (v) . CSI Report Processing
[0101] Each of the following can be determined: the number of CSI processing units occupied by the report, the number of active resources associated with the CSI report, and the number of active ports associated with the CSI report.
[0102] The CSI report occupies a number of CSI processing units (CPU) , the number of occupied CPUs OCPU can be determined by at least one of: the number of associated SRS ports PSRS, the number of associated SRS resources RSRS, the number of associated CSI-RS ports PCSI-RS, the number of associated CSI-RS resources RCSI-RS, the number of TRPs NTRP, and a value Q. Q can be a predefined value, e.g., 2, 4, or determined by a reported UE capability. OCPU can be determined by at least on of: OCPU=QNTRP, OCPU=QRCSI-RS, OCPU=QRSRSNTRP, OCPU=QRSRSRCSI-RS.
[0103] The number of active resources associated with the CSI report can be determined by at least one of: the number of CSI-RS resources RCSI-RS associated with the CSI report, the number of SRS resources RSRS associated with the CSI report, and a value G. G can be a predefined value, e.g., 2, 4, or determined by a reported UE capability. The number of active resources associated with the CSI report can be determined by at least one of: GRCSI-RS, GRCSI-RSRSRS.
[0104] The number of active ports associated with the CSI report can be determined by at least one of: the number of CSI-RS ports PCSI-RS associated with the CSI report, the number of SRS ports PSRS associated with the CSI report, and a value K. K can be a predefined value, e.g., 2, 4, or determined by a reported UE capability. The number of active resources associated with the CSI report can be determined by at least one of: KPCSI-RS, KPSRSPCSI-RS.
[0105] II. Implementation-2
[0106] In Implementation #2, the UE transmits SRS after receiving CSI-RS. Figure 2 illustrates an example process for phase misalignment measurement under implementation-2.
[0107] II. A. Implementation-2 Procedure
[0108] For implementation #2, the possible procedure of phase misalignment measurement can be as follows:
[0109] - Each TRP transmits a PCSI-RS-port CSI-RS to the UE. (PCSI-RS≥1) .
[0110] - The UE may select n CSI-RS port (s) out of PCSI-RS CSI-RS port (s) for each CSI-RS resource. The UE receives the PCSI-RS / n CSI-RS port (s) for each CSI-RS resource using mselected antenna port (s) . (m≥1, PCSI-RS≥n≥1) .
[0111] - The UE measures and reports nm sets of downlink phase misalignment information.
[0112] - The gNB triggers RSRS SRS resource (s) , each of the SRS resource (s) is configured with PSRS SRS port (s) . The UE transmits the SRS resource (s) using at least the mselected antenna ports. (PSRSRSRS≥m) . The gNB measures and calculates phase misalignment information from the SRS resource (s) .
[0113] II. B. Implementation-2 Linkage between SRS and CSI-RS
[0114] For implementation-2, the linkage between SRS and CSI-RS used for phase misalignment measurement can be achieved by at least one of the following methods in addition or alternative to at least one of the above methods for implementation-1:
[0115] The CSI report can include at least one of: one or multiple set (s) of phase misalignment information; the number of set (s) of phase misalignment information; one or more selected CSI-RS port (s) for each CSI-RS resource; the number of selected CSI-RS port (s) ; the number of antenna port (s) used to receive each of the CSI-RS port (s) . The selected CSI-RS port (s) can be all the PCSI-RS CSI-RS port (s) in each CSI-RS resource. The selected CSI-RS port (s) can be indicated by at least one of: n CSI-RS port indices, a combinatorial number, or a bitmap.
[0116] The number of set (s) of phase misalignment information can be 1, n, m, or nm, where PCSI-RS≥n≥1 is the number of selected CSI-RS port (s) , PCSI-RS is the number of CSI-RS port (s) in each CSI-RS resource, m≥1 is the number of antenna port (s) used to receive each of the CSI-RS port (s) . In some embodiments, each set of phase misalignment information can be associated with one CSI-RS port and / or an SRS port. In some embodiments, the set (s) of phase misalignment information can be ordered firstly based on an ascending / descending order of the associated CSI-RS port indices (the CSI-RS port (s) can be indexed by the order that they are reported in the CSI report) , and secondly based one an ascending order of the associated SRS port indices. In some embodiments, the set (s) of phase misalignment information can be ordered firstly based on an ascending order of the associated SRS port indices, and secondly based on an ascending / descending order of the associated CSI-RS port indices (the CSI-RS port (s) can be indexed by the order that they are reported in the CSI report) .
[0117] If the SRS resource (s) are triggered by a DCI, the DCI or the SRS resource (s) can be associated with a CSI reporting setting associated with a CSI report, where the CSI report includes at least one set of phase misalignment information.
[0118] In some embodiments, the DCI can be associated with an ID of the CSI reporting setting. In some embodiments, the DCI is associated with the latest CSI report associated with the CSI reporting setting no later than a time instant. The time instant can be determined by at least one of: the DCI / OFDM symbol / time instant triggering the SRS resource (s) , the numerology of the PDCCH carrying the DCI uDL, the numerology of the PUCCH / PUSCH carrying the CSI report uUL, a time length L, or a UE capability. For example, the time instant can be the DCI / OFDM symbol / time instant triggering the SRS resource (s)
[0119] The SRS resource (s) can be transmitted using at least the antenna port (s) used to measure the CSI report.
[0120] An SRS port in one of the SRS resource (s) can be associated with one or more or all the set (s) of phase misalignment information in the CSI report.
[0121] The i-th SRS port can be associated with the i-th set of phase misalignment information in the CSI report.
[0122] The i-th SRS port can be associated with the [ (i-1) n+1] th to in-th set (s) of phase misalignment information in the CSI report, where n is the number of CSI-RS ports reported or associated with the CSI report.
[0123] The SRS port (s) in the SRS resource (s) can be ordered firstly based on an ascending / descending order the SRS resource IDs, and secondly based on an ascending / descending order of the SRS port indices within an SRS resource.
[0124] Embodiment 2
[0125] Embodiments disclosed in this section relate to the linkage between the CJT calibration CSI report and the CJT CSI report. The CJT CSI report refers to a CSI report including at least one of: CRI, RI, PMI, CQI for CJT. The CJT calibration CSI report refers to a CSI report including at least one of: delay / frequency / phase misalignment information, where the delay / frequency misalignment information can include at least a set of DOs / FOs. The CJT calibration CSI report may be reported prior to the UE determining the CJT CSI report. The UE needs to link the CJT CSI report to the prior CJT calibration CSI report to take into account the delay / frequency misalignment information when calculating the CJT CSI report.
[0126] The linkage between CJT calibration CSI report and CJT CSI report can be achieved by at least one of the following methods:
[0127] I. Linkage Provided by gNB
[0128] In a first method, the gNB provides the information included in a CJT calibration CSI report (e.g., delay misalignment information, frequency misalignment information, and / or phase misalignment information) to the UE.
[0129] The CSI reporting configuration signaling from the gNB can include at least one of a CSI reporting setting parameter and / or a trigger state parameter. Each CSI reporting setting and / or trigger state can be associated with one or more CSI-RS resource set (s) and one or more CSI-RS resource (s) . Candidate values of a DO or FO can include at least one of: 0, ‘invalid’ , or ‘out-of-range’ .
[0130] 1. In some embodiments, a CSI reporting setting or a trigger state can be associated with a time and / or a frequency unit / granularity used for PDSCH time and / or frequency pre-compensation.
[0131] 2. In some embodiments, a CSI reporting setting can be associated with a set of DOs and / or FOs. The RI / PMI / CQI in the CSI report associated with the CSI reporting setting can be determined by the DOs and / or FOs associated with the CSI reporting setting.
[0132] A CSI-RS resource in a CSI-RS resource set associated with the CSI reporting setting can be associated with a DO and / or FO in the set of DOs and / or FOs. In some examples, the i-th / (i+1) -th CSI-RS resource in the CSI-RS resource set can be associated with the i-th DO and / or FO in the set of DOs and / or FOs. In some examples, the CSI-RS resources in the CSI-RS resource set can be ordered based on an ascending / descending order of CSI-RS resource IDs. The i-th CSI-RS resource in the CSI-RS resource set can refer to the CSI-RS resource with the i-th smallest / largest CSI-RS resource ID. If one CSI-RS resource is not associated with a DO and / or FO, it implies that the CSI-RS resource is associated with a zero DO and / or FO, and / or the CSI-RS resource is the reference CSI-RS resource.
[0133] 3. In some embodiments, a trigger state can be associated with a set of DOs and / or FOs. The RI / PMI / CQI in the CSI report associated with the trigger state can be determined by the DOs and / or FOs associated with the trigger state.
[0134] A CSI-RS resource in a CSI-RS resource set associated with the aperiodic trigger state can be associated with a DO and / or FO in the set of DOs and / or FOs. The i-th / (i+1) -th CSI-RS resource in the CSI-RS resource set can be associated with the i-th DO and / or FO in the set of DOs and / or FOs. The CSI-RS resources in the CSI-RS resource set can be ordered based on an ascending / descending order of CSI-RS resource IDs. The i-th CSI-RS resource in the CSI-RS resource set can refer to the CSI-RS resource with the i-th smallest / largest CSI-RS resource ID. If one CSI-RS resource is not associated with a DO and / or FO, it implies that the CSI-RS resource is associated with a zero DO and / or FO, or / and the CSI-RS resource is the reference CSI-RS resource.
[0135] 4. In some embodiments, a CSI-RS resource set can be associated with a set of DOs and / or FOs. The RI / PMI / CQI in the CSI report associated with the CSI reporting setting / trigger state can be determined by the DOs and / or FOs associated with the CSI-RS resource set.
[0136] A CSI-RS resource in the CSI-RS resource set can be associated with a DO and / or FO in the set of DOs and / or FOs. The i-th / (i+1) -th CSI-RS resource in the CSI-RS resource set can be associated with the i-th DOs and / or FOs in the set of DOs and / or FOs. The CSI-RS resources in the CSI-RS resource set can be ordered based on an ascending / descending order of CSI-RS resource IDs. The i-th CSI-RS in the CSI-RS resource set can refer to the CSI-RS resource with the i-th smallest / largest CSI-RS resource ID. If one CSI-RS resource is not associated with a DO and / or FO, it implies that the CSI-RS resource is associated with a zero DO and / or FO, or / and the CSI-RS resource is the reference CSI-RS resource.
[0137] 5. In some embodiments, a CSI-RS resource can be associated with a DO and / or FO. The PMI and / or CQI in the CSI report associated with the CSI reporting setting / trigger state can be determined by the DOs and / or FOs associated with the CSI-RS resources. If one CSI-RS resource is not associated with a DO and / or FO, it implies that the CSI-RS resource is associated with a zero DO and / or FO, or / and the CSI-RS resource is the reference CSI-RS resource.
[0138] II. Linkage via Reference Used by UE
[0139] A first CSI reporting setting associated with a CJT CSI report can be associated with a second CSI reporting setting associated with a CJT calibration CSI report. The RI / PMI / CQI in the CJT CSI report can be determined by the delay / frequency misalignment information or DOs / FOs in the associated CJT calibration CSI report.
[0140] 1. In some embodiments, a first CSI reporting setting associated with a CJT CSI report can be associated with the identifier (ID) of a second CSI reporting setting associated with a CJT calibration CSI report.
[0141] 2. In some embodiments, the CJT CSI report associated with the first CSI reporting setting can be associated with the latest CJT calibration CSI report associated with the second CSI reporting setting no later than a time instant. The time instant can be determined by at least one of: the DCI / symbol / time instant triggering the CJT CSI report, a time length L, the numerology of the PDCCH carrying the DCI uDL, the numerology of the PUCCH / PUSCH carrying the CJT calibration CSI report uUL, or a UE capability. The time instant can be L before the DCI / symbol / time instant triggering the CJT CSI report. The time length L can be a predefined value (e.g., 14 or 28 symbols) , or a reported UE capability.
[0142] 3. In some embodiments, the UE can only report the CJT CSI report if there exists a valid CJT calibration CSI report associated with the second CSI reporting setting no earlier than a first time instant and / or no later than a second time instant. Otherwise, the UE may drop the CJT CSI report. The first or the second time instant can be determined by at least one of: the DCI / symbol / time instant triggering the CJT CSI report, a first / second time length L1 / L2, the numerology of the PDCCH carrying the DCI uDL, the numerology of the PUCCH / PUSCH carrying the CJT calibration CSI report uUL, a first / second UE capability. The first time instant can be L1 before the DCI / symbol / time instant triggering the CJT CSI report. The second time instant can be L2 before the DCI / symbol / time instant triggering the CJT CSI report. The first / second time length L1 / L2 can be a predefined value (e.g., 0, 14, 28, 140, or 280 symbols) , or a reported UE capability.
[0143] 4. In some embodiments, each CSI-RS resource or CSI-RS resource set associated with the first CSI reporting setting can be associated with a CSI-RS resource or CSI-RS resource set associated with the second CSI reporting setting. For example, the i-th CSI-RS resource or CSI-RS resource set associated with the first CSI reporting setting can be associated with the i-th CSI-RS resource or CSI-RS resource set associated with the second CSI reporting setting. If one CSI-RS resource or CSI-RS resource set associated with the first CSI reporting setting is associated with a one CSI-RS resource or CSI-RS resource set associated with the second CSI reporting setting, the CSI-RS resource or CSI-RS resource set associated with the first CSI reporting setting is associated with the DO and / or FO in the CJT calibration CSI corresponding to the CSI-RS resource or CSI-RS resource set associated with the second CSI reporting setting.
[0144] 5. In some embodiments, each CSI-RS resource or CSI-RS resource associated with the first CSI reporting setting can be associated with a DO and / or FO in the CJT calibration CSI report. For example, the i-th CSI-RS resource or CSI-RS resource associated with the first CSI reporting setting can be associated with the i-th DO an / or FO in the CJT calibration CSI report.
[0145] III. Linkage with Simultaneous Calibration and CSI Reports
[0146] A trigger state can be associated with a first CSI reporting setting associated with a CJT CSI report and a second CSI reporting setting associated with a CJT calibration CSI report. For example, a trigger state can be associated with the ID of a CSI reporting setting associated with a CJT CSI report and the ID of a CSI reporting setting associated with a CJT calibration CSI report.
[0147] The trigger state can trigger a CJT CSI report associated with the first CSI reporting setting and a CJT calibration CSI report associated with the second CSI reporting setting simultaneously. The RI / PMI / CQI in the CJT CSI report can be determined by the delay / frequency misalignment information or DOs / FOs in the CJT CSI calibration report.
[0148] In some embodiments, each CSI-RS resource or CSI-RS resource set associated with the first CSI reporting setting can be associated with a CSI-RS resource or CSI-RS resource set associated with the second CSI reporting setting. For example, the i-th CSI-RS resource or CSI-RS resource set associated with the first CSI reporting setting can be associated with the i-th CSI-RS resource or CSI-RS resource set associated with the second CSI reporting setting. If one CSI-RS resource or CSI-RS resource set associated with the first CSI reporting setting is associated with a one CSI-RS resource or CSI-RS resource set associated with the second CSI reporting setting, the CSI-RS resource or CSI-RS resource set associated with the first CSI reporting setting is associated with the DO and / or FO in the CJT calibration CSI corresponding to the CSI-RS resource or CSI-RS resource set associated with the second CSI reporting setting.
[0149] In some embodiments, each CSI-RS resource or CSI-RS resource associated with the first CSI reporting setting can be associated with a DO and / or FO in the CJT calibration CSI report. For example, the i-th CSI-RS resource or CSI-RS resource associated with the first CSI reporting setting can be associated with the i-th DO an / or FO in the CJT calibration CSI report.
[0150] Embodiment 3
[0151] Embodiments disclosed in this section relate to CJT PMI / CQI calculation assumption. Generally, information in the CJT CSI report is calculated via the following assumptions that are based upon information included in a calibration report linked to the CJT CSI report.
[0152] The RI / PMI / CQI calculation assumption for CJT CSI report can be determined by at least one of the following methods:
[0153] 1. The CRI / RI / PMI / CQI of the CJT CSI report can be determined by at least one of: the channel derived from the associated CSI-RS resources, the time / frequency locations of the associated CSI-RS resources, the time granularity used for PDSCH pre-compensation, the frequency granularity used for PDSCH pre-compensation, a frequency reference point, a time reference point, the DOs, the FOs, the delay misalignment information, or the frequency misalignment information.
[0154] The CRI / RI / PMI / CQI can be determined by at least one of:
[0155] where are the indices of the N0 selected CSI-RS resources in increasing order, such that is the channel derived from the CSI-RS resource with index σn at a frequency point and a time point and denotes the frequency location and the time location of the CSI-RS resource with index σn, respectively, and and can correspond to the first / last / middle subcarrier and the first / last / middle symbol occupied by the CSI-RS resource with index σn, respectively, k0 is a reference frequency point, denotes the number of frequency units between the time point and the reference time point k0, Δf is a frequency unit, is the DO associated with the CSI-RS resource with index σn, l0 is a reference time point, Δt is a time unit, denotes the number of time units between the time point and the reference time point l0, is the FO associated with the CSI-RS resource with index σn.
[0156] The time unit can be determined by the time granularity used for PDSCH pre-compensation.
[0157] The frequency unit can be determined by the frequency granularity used for PDSCH pre-compensation.
[0158] The frequency reference point can be 0, the first / last frequency unit of the frequency band carrying the CSI-RS, or the first / last frequency unit of the frequency band of the CSI reference resource.
[0159] The time reference point can be 0, the first symbol of the first CSI-RS resource, or the 1st / 3rd symbol of the CSI reference resource.
[0160] 2. The CRI / RI / PMI / CQI can be determined according to at least one of the following assumptions of precoding procedure:
[0161] Where is a vector of symbols transmitted on antenna ports [3000, …, 3000+P-1] of each of the N0 selected CSI-RS resources corresponding to a frequency point k and a time point l, x (k, l) = [x (0) (k, l) … x (υ-1) (k, l) ] T is a vector of PDSCH symbols corresponding to a frequency point k and a time point l, P∈ [1, 2, 4, 8, 12, 16, 24, 32] is the number of CSI-RS ports, are the indices of the N0 selected CSI-RS resources in increasing order, such that is the precoding matrix corresponding to the CSI-RS resource with index σn, k0 is a reference frequency point, (k-k0) denotes the number of frequency units between the time point k and the reference time point k0, Δf is a frequency unit, is the DO associated with the CSI-RS resource with index σn, l0 is a reference time point, Δt is a time unit, (l-l0) denotes the number of time units between the time point l and the reference time point l0, is the FO associated with the CSI-RS resource with index σn.
[0162] Example Solutions
[0163] As discussed herein, the present document provides techniques for linking the SRS and CSI-RS for phase misalignment information measurement, linking the CJT calibration CSI report and the CJT CSI report, and RI / PMI / CQI calculation assumption for the CJT CSI report.
[0164] Some embodiments may implement one or more of the following solutions, listed in clause-format. The following clauses are supported and further described in the embodiments above and throughout this document. As used in the clauses below and in the claims, a wireless device may be user equipment, mobile station, or any other wireless terminal including fixed nodes such as base stations. A network device includes a base station including a next generation Node B (gNB) , enhanced Node B (eNB) , or any other device that performs as a base station. The following listing of solutions may be implemented by some preferred embodiments:
[0165] Solution 1. A wireless communication method (e.g., the method as shown in Figure 3) , including: receiving (302) , by a wireless communication device, a channel state information (CSI) reporting configuration signaling, wherein the CSI reporting configuration signaling is associated with at least one of a reference signal (RS) resource or a reference signal resource set; determining (304) , by the wireless communication device, a CSI according to the CSI reporting configuration signaling, wherein the CSI includes at least one of: a CSI-RS resource indicator (CRI) , a rank indicator (RI) , a precoding matrix indicator (PMI) , a channel quality indicator (CQI) , a delay misalignment information, a frequency misalignment information, or a phase misalignment information; and reporting (306) , by the wireless communication device, the CSI, to a network device.
[0166] Solution 2. A wireless communication method (e.g., the method shown in Figure 4) , including: transmitting (402) , by a network device, a channel state information (CSI) reporting configuration signaling, wherein the CSI reporting configuration signaling is associated with at least one of a reference signal (RS) resource or a reference signal resource set; and receiving (404) , by the network device, a CSI from a wireless communication device, wherein the CSI is determined according to the CSI reporting configuration signaling, and wherein the CSI includes at least one of: a CSI-RS resource indicator (CRI) , a rank indicator (RI) , a precoding matrix indicator (PMI) , a channel quality indicator (CQI) , a delay misalignment information, a frequency misalignment information, or a phase misalignment information.
[0167] Solution 3. The method of any one or more of the solutions disclosed herein, wherein the CSI reporting configuration signaling includes at least one of: a CSI reporting setting, a trigger state, or a downlink control information (DCI) .
[0168] Solution 4. The method of any one or more of the solutions disclosed herein, wherein the CSI reporting setting is associated with at least one of: one or more CSI-RS resource sets, or one or more sounding reference signal (SRS) resource sets; and wherein each CSI-RS resource set is associated with RCSI-RS≥1 CSI-RS resources, wherein each CSI-RS resource is configured with PCSI-RS≥1 CSI-RS ports; and wherein each SRS resource set is associated with RSRS≥1 SRS resources, wherein each SRS resource is configured with PSRS≥1 SRS ports.
[0169] Solution 5. The method of any one or more of the solutions disclosed herein, wherein each SRS port configured within one of the SRS resources associated with one of the one or more SRS resource sets is associated with one or more or all the CSI-RS ports configured within each of the CSI-RS resources associated with one of the one or more CSI-RS resource sets.
[0170] Solution 6. The method of any one or more of the solutions disclosed herein, wherein an i-th SRS port configured across all the SRS resources associated with one of the SRS resource sets is associated with [ (i-1) n+1] -th to in-th CSI-RS ports configured within each of the CSI-RS resources associated with one of the CSI-RS resource sets, wherein n is an integer equal or greater than 1.
[0171] Solution 7. The method of any one or more of the solutions disclosed herein, wherein the trigger state is associated with the CSI reporting setting, the trigger state is associated with one CSI-RS resource set out of the one or more CSI-RS resource sets associated with the CSI reporting setting, and the trigger state is associated with one SRS resource set out of the one or more SRS resource sets associated with the CSI reporting setting.
[0172] Solution 8. The method of any one or more of the solutions disclosed herein, wherein the trigger state is associated with one or more or all the SRS resources associated with the SRS resource set associated with the trigger state, and wherein the trigger state is associated with one or more or all the SRS ports configured within each SRS resource associated with the trigger state.
[0173] Solution 9. The method of any one or more of the solutions disclosed herein, wherein the trigger state includes at least one of: an SRS resource set identifier, an SRS resource identifier, an SRS port identifier, a bitmap indicating the SRS resources associated with the trigger state, a bitmap indicating the SRS ports associated with the trigger state, a combinatorial number indicating the SRS resources associated with the trigger state, or a combinatorial number indicating the SRS ports associated with the trigger state.
[0174] Solution 10. The method of any one or more of the solutions disclosed herein, wherein the trigger state is associated with one or more or all the CSI-RS ports configured within each CSI-RS resource associated with the CSI-RS resource set associated with the trigger state.
[0175] Solution 11. The method of any one or more of the solutions disclosed herein, wherein the trigger state includes at least one of: a CSI-RS resource set identifier, a CSI-RS resource identifier, a CSI-RS port identifier, a bitmap indicating the CSI-RS ports associated with the trigger state, or a combinatorial number indicating the CSI-RS ports associated with the trigger state.
[0176] Solution 12. The method of any one or more of the solutions disclosed herein, wherein each SRS port associated with the trigger state is associated with one or more all the CSI-RS ports associated with the trigger state configured within each CSI-RS resource associated with the trigger state.
[0177] Solution 13. The method of any one or more of the solutions disclosed herein, wherein the i-th SRS port associated with the trigger state is associated with the [ (i-1) n+1] -th to in-th CSI-RS ports associated with the trigger state configured within each CSI-RS resource associated with the trigger state, and wherein n is an integer equal or greater than 1.
[0178] Solution 14. The method of any one or more of the solutions disclosed herein, wherein the CSI reporting setting or the trigger state includes at least one of: an indicator of whether the associated CSI-RS ports are precoded or not, or an indicator of whether there exists one-to-one or one-to-multiple mapping relationship between the associated CSI-RS ports and SRS ports.
[0179] Solution 15. The method of any one or more of the solutions disclosed herein, wherein the CSI includes at least one of: one or more sets of phase misalignment information, a number of the sets of phase misalignment information, an indicator of one or more CSI-RS ports, an indicator of one or more SRS resources, or an indicator of one or more SRS ports.
[0180] Solution 16. The method of any one or more of the solutions disclosed herein, wherein the DCI is associated with the trigger state, and wherein the DCI triggers at least one of: the wireless communication device reporting the CSI, a transmission of the CSI-RS resources associated with the trigger state, or a transmission of the SRS resources associated with the trigger state, simultaneously.
[0181] Solution 17. The method of any one or more of the solutions disclosed herein, wherein the DCI is associated with the trigger state; and wherein the trigger state is associated with a last transmission occasion of the SRS resources associated with the trigger state or the CSI reporting setting no later than a first time instant, or the trigger state is associated with a first transmission occasion of the SRS resources associated with the trigger state or the CSI reporting setting no earlier than a second time instant; and wherein the first time instant is determined by at least one of: a time instant of the DCI triggering the CSI, a numerology of a PDCCH carrying the DCI, a numerology of a PUCCH / PUSCH carrying the CSI or the transmission occasion of the SRS resources, a first time length, or a first UE capability; and wherein the second time instant is determined by at least one of: a last symbol of a PUCCH / PUSCH carrying the CSI or the transmission occasion of the SRS resources, a second time length, or a second UE capability.
[0182] Solution 18. The method of any one or more of the solutions disclosed herein, wherein the DCI is associated with the trigger state, and the wireless communication device only reports a CSI when there exists at least one transmission occasion of the SRS resources associated with the trigger state or the CSI reporting setting no earlier than a first time instant and / or no later than a second time instant, otherwise, the wireless communication device drops the CSI; and wherein the first time instant is determined by at least one of: a time instant of the DCI triggering the CSI, a numerology of a PDCCH carrying the DCI, or a numerology of a PUCCH / PUSCH carrying the CSI or the transmission occasion of the SRS resources, a first time length, or a first UE capability; and wherein the second time instant is determined by at least one of:a time instant of the DCI triggering the CSI, a numerology of a PDCCH carrying the DCI, or a numerology of a PUCCH / PUSCH carrying the CSI or the transmission occasion of the SRS resources, a second time length, or a second UE capability.
[0183] Solution 19. The method of any one or more of the solutions disclosed herein, wherein the DCI is associated with the trigger state, and wherein the wireless communication device expects that a transmission occasion of the CSI-RS resources associated with the trigger state or the CSI reporting setting occurs no earlier than a time instant and / or a time triggering offset of the CSI-RS resources associated with the trigger state is no smaller than a threshold value X, and wherein the time instant is determined by at least one of: a time instant of the DCI triggering the CSI, a time length, or a UE capability.
[0184] Solution 20. The method of any one or more of the solutions disclosed herein, wherein the DCI triggers a transmission of one or more SRS resources, or one or more SRS resource sets, and wherein the DCI is associated with the CSI reporting setting and / or the one or more SRS resources or the one or more SRS resource sets are associated with the CSI reporting setting.
[0185] Solution 21. The method of any one or more of the solutions disclosed herein, wherein the CSI is associated with a number of CSI processing units (CPUs) , and wherein the number of CPUs is determined by at least one of: a number of TRPs, a number of CSI-RS resources or ports associated with the CSI reporting setting or the trigger state, a number of SRS resources or ports associated with the CSI reporting setting or the trigger state, a predefined value, or a UE capability.
[0186] Solution 22. The method of any one or more of the solutions disclosed herein, wherein the CSI is associated with a number of active resources and a number of active ports; and wherein the number of active resources or the number of active ports is determined by at least one of: a number of CSI-RS resources or ports associated with the CSI reporting setting or the trigger state, a number of SRS resources or ports associated with the CSI reporting setting or the trigger state, a predefined value, or a UE capability.
[0187] Solution 23. The method of any one or more of the solutions disclosed herein, wherein the CSI reporting setting or the trigger state is associated with at least one of: a set of delay offsets (DO) , a set of frequency offsets (FO) , a frequency granularity used for PDSCH pre-compensation, or a time granularity used for PDSCH pre-compensation, wherein each CSI-RS resource associated with the CSI reporting setting or trigger state is associated with a DO and / or a FO in the set of Dos and / or FOs.
[0188] Solution 24. The method of any one or more of the solutions disclosed herein, wherein each CSI-RS resource set is associated with at least one of: a set of Dos, a set of FOs, a frequency granularity used for PDSCH pre-compensation, or a time granularity used for PDSCH pre-compensation, wherein each CSI-RS resource associated with the CSI-RS resource set is associated with a DO and / or a FO in the set of Dos and / or FOs.
[0189] Solution 25. The method of any one or more of the solutions disclosed herein, each CSI-RS resource is associated with at least one of: a DO, a FO, a frequency granularity used for PDSCH pre-compensation, or a time granularity used for PDSCH pre-compensation.
[0190] Solution 26. The method of any one or more of the solutions disclosed herein, wherein the CSI reporting configuration signaling includes at least a first CSI reporting setting and a second CSI reporting setting, wherein the first CSI reporting setting is associated with the second CSI setting, and wherein the first CSI reporting setting is associated with a first CSI including at least one of: a CRI, a RI, a PMI, or a CQI, the second CSI reporting setting is associated with a second CSI including at least one of: a delay misalignment information including at least a set of Dos, a frequency misalignment information including at least a set of FOs, or a phase misalignment information, wherein the CRI, the RI, the PMI, or the CQI in the first CSI is determined by at least one of: the delay misalignment information in the second CSI, the frequency misalignment information in the second CSI, or the phase misalignment in the second CSI.
[0191] Solution 27. The method of any one or more of the solutions disclosed herein, wherein the first CSI reporting setting or the first CSI is associated with a last report of the second CSI no later than a time instant, wherein the time instant is determined by at least one of: a time instant of a DCI triggering the first CSI or indicating the first CSI reporting setting, a numerology of a PDSCH carrying the DCI, a numerology of a PUSCH carrying the first CSI, a time length, or a UE capability.
[0192] Solution 28. The method of any one or more of the solutions disclosed herein, wherein the wireless communication device reports the first CSI only if there exists at least one valid report of the second CSI no earlier than a first time instant and / or no later than a second time instant, wherein the first time instant or the second time instant is determined by at least one of:a time instant of a DCI triggering the first CSI or indicating the first CSI reporting setting, a numerology of a PDSCH carrying the DCI, a numerology of a PUSCH carrying the first CSI, a first time length, a second time length, a first UE capability, or a second UE capability.
[0193] Solution 29. The method of any one or more of the solutions disclosed herein, wherein the trigger state is associated with at least a first CSI reporting setting and a second CSI reporting setting, wherein the first CSI reporting setting is associated with the second CSI setting, and wherein the first CSI reporting setting is associated with a first CSI including at least one of: a CRI, a RI, a PMI, or a CQI, the second CSI reporting setting is associated with a second CSI including at least one of: a delay misalignment information including at least a set of FOs, a frequency misalignment information including at least a set of FOs, or a phase misalignment information, wherein the wherein the CRI, the RI, the PMI, or the CQI in the first CSI is determined by at least one of: the delay misalignment information in the second CSI, the frequency misalignment information in the second CSI, or the phase misalignment in the second CSI.
[0194] Solution 30. The method of any one or more of the solutions disclosed herein, wherein each CSI-RS resource or CSI-RS resource set associated with the first CSI reporting setting is associated with a CSI-RS or CSI-RS resource set associated with the second CSI reporting setting.
[0195] Solution 31. The method of any one or more of the solutions disclosed herein, wherein each CSI-RS resource or CSI-RS resource set associated with the first CSI reporting setting is associated with a DO or / and a FO in the set of DOs and / or FOs of the second CSI.
[0196] Solution 32. The method of any of solutions 3-5 and 22-24, wherein at least one of the CRI, RI, PMI, or CQI of the CSI is determined by at least one of: channel estimates based on the CSI-RS resources, the time location of the CSI-RS resources, the frequency location of the CSI-RS resources, the DOs and / or FOs associated with the CSI-RS resources, the time granularity used for PDSCH pre-compensation, the frequency granularity used for PDSCH pre-compensation, a reference time point, or a reference frequency point.
[0197] Solution 33. The method of any one or more of the solutions disclosed herein, wherein at least one of the CRI, RI, PMI, or CQI of the CSI is determined by at least one of the precoding assumptions disclosed in Embodiment 3 above.
[0198] Solution 34. The method of any one or more of the solutions disclosed herein, wherein at least one of the CRI, RI, PMI, or CQI of the first CSI is determined by at least one of: channel estimates based on the CSI-RS resources associated with the first CSI reporting setting, a time location of the CSI-RS resources associated with the first CSI reporting setting, a frequency location of the CSI-RS resources associated with the first CSI reporting setting, the DOs and / or FOs associated with the CSI-RS resources associated with the first CSI reporting setting, the time granularity used for PDSCH pre-compensation, the frequency granularity used for PDSCH pre-compensation, a reference time point, or a reference frequency point.
[0199] Solution 35. The method of any one or more of the solutions disclosed herein, wherein at least one of the CRI, RI, PMI, or CQI of the first CSI is determined according to one of the precoding assumptions disclosed in Embodiment 3 above.
[0200] Solution 36. A wireless communication method, including: transmitting, by a wireless communication device, downlink misalignment information for a set of downlink reference signals received from a plurality of transmission-reception points (TRPs) based on the set of downlink reference signals being associated with a set of uplink reference signals transmitted from the wireless communication device; determining, by the wireless communication device, a channel state information (CSI) based at least on the downlink misalignment information; and transmitting, by the wireless communication device, the CSI to a network device including at least one of the plurality of TRPs.
[0201] Solution 37. A wireless communication method, including: receiving, by a network node, downlink misalignment information for a set of downlink reference signals transmitted to a wireless communication device from a plurality of TRPs, wherein the set of downlink reference signals are associated with a set of uplink reference signals received from the wireless communication device; and receiving, by the network node, a CSI derived by the wireless communication device based at least on the downlink misalignment information.
[0202] Solution 38. The method of any one or more of the solutions disclosed herein, further including: receiving, by the wireless communication device, a configuration for the downlink misalignment information, wherein the configuration indicates the set of uplink reference signals; and identifying the set of downlink reference signals to be measured by the downlink misalignment information based on the configuration.
[0203] Solution 39. The method of any one or more of the solutions disclosed herein, further including: receiving, by the wireless communication device, a configuration for the downlink misalignment information, wherein the configuration indicates the set of downlink reference signals.
[0204] Solution 40. The method of any one or more of the solutions disclosed herein, wherein the configuration indicates the set of uplink reference signals or the set of downlink reference signals based on including port identifiers or resource set identifiers associated with the set of uplink reference signals or associated with the set of downlink reference signals.
[0205] Solution 41. The method of any one or more of the solutions disclosed herein wherein the downlink misalignment information includes a number of phase information sets corresponding to a number of ports associated with the set of uplink reference signals or with the set of downlink reference signals.
[0206] Solution 42. The method of any one or more of the solutions disclosed herein, wherein the number of phase information sets are ordered according to port indices for the number of ports associated with the set of uplink reference signals or with the set of downlink reference signals.
[0207] Solution 43. The method of any one or more of the solutions disclosed herein, wherein the downlink misalignment information is transmitted simultaneously with at least one of the set of uplink reference signals.
[0208] Solution 44. The method of any one or more of the solutions disclosed herein, further including: determining to transmit the downlink misalignment information based on at least one of set of uplink reference signals being transmitted within a prior time duration.
[0209] Solution 45. The method of any one or more of the solutions disclosed herein, further including: determining a number of a virtual processing units for determining the downlink misalignment information based on at least one of: a number of ports associated with the set of uplink reference signals, a number of resources associated with the set of uplink reference signals, a number of ports associated with the set of downlink reference signals, a number of resources associated with the set of downlink reference signals, or a number of the plurality of TRPs.
[0210] Solution 46. The method of any one or more of the solutions disclosed herein, further including: determining an association between the set of downlink reference signals and the set of uplink reference signals based on whether the set of downlink reference signals are precoded or non-precoded.
[0211] Solution 47. The method of any one or more of the solutions disclosed herein, further including: transmitting the set of uplink reference signals subsequent to transmitting the downlink misalignment information using antenna ports associated with at least some of the set of downlink reference signals measured by the downlink misalignment information.
[0212] Solution 48. The method of any one or more of the solutions disclosed herein, further including: receiving a trigger signaling that includes an indication of the antenna ports.
[0213] Solution 49. The method of any one or more of the solutions disclosed herein, further including: determining the antenna ports for transmitting the set of uplink reference signals based on a trigger signaling includes an identifier for the downlink misalignment information.
[0214] Solution 50. The method of any one or more of the solutions disclosed herein, wherein the CSI is determined based on the downlink misalignment information being included in a CSI reporting configuration signaling or a CSI reporting trigger signaling that is received by the wireless communication device from the network device.
[0215] Solution 51. The method of any one or more of the solutions disclosed herein, further including: storing the downlink misalignment information subsequent to transmitting the downlink misalignment information; and receiving an indication to use the stored downlink misalignment information a CSI reporting configuration signaling or a CSI reporting trigger signaling that is received by the wireless communication device from the network device.
[0216] Solution 52. The method of any one or more of the solutions disclosed herein, further including: determining to use the stored downlink misalignment information for determining the CSI based on the downlink misalignment information being transmitted in a prior time duration.
[0217] Solution 53. The method of any one or more of the solutions disclosed herein, wherein the downlink misalignment information and the CSI are transmitted simultaneously, the CSI being determined based on the downlink misalignment information prior to the downlink misalignment information being transmitted.
[0218] Solution 54. The method of any one or more of the solutions disclosed herein, wherein the CSI is determined based on at least one of inter-TRP delay information or inter-TRP frequency information included in the downlink misalignment information.
[0219] Solution 55. The method of any one or more of the solutions disclosed herein, wherein the CSI includes at least one of a rank indicator (RI) , a precoding matrix indicator (PMI) , or a channel quality indicator (CQI) , and wherein the downlink misalignment information includes at least one of inter-TRP delay information, inter-TRP frequency information, or inter-TRP phase information.
[0220] Solution 56. The method of any one or more of the solutions disclosed herein, wherein the PMI is determined based on a channel derived from the inter-TRP delay information, from the inter-TRP frequency information, or from both the inter-TRP delay information and the inter-TRP frequency information.
[0221] Solution 57. The method of any one or more of the solutions disclosed herein, wherein the downlink misalignment information is a coherent joint transmission (CJT) calibration report, and wherein the CSI is a CJT CSI report.
[0222] Solution 58. An apparatus for wireless communication comprising one or more processors configured to cause the apparatus to implement a method recited in any one or more of the solutions disclosed herein.
[0223] Solution 59. A non-transitory computer-readable program storage medium having code stored thereon, the code, when executed by one or more processors, causing the processor to implement a method recited in any one or more of the solutions disclosed herein.
[0224] FIG. 5 shows an exemplary block diagram of a hardware platform 500 that may be a part of a network device (e.g., base station) or a communication device (e.g., a user equipment (UE) ) . The hardware platform 500 includes at least one processor 510 and a memory 505 having instructions stored thereupon. The instructions upon execution by the processor 510 configure the hardware platform 500 to perform the operations described in FIGS. 1 to 4 and in the various embodiments described in this patent document. The transmitter 515 transmits or sends information or data to another device. For example, a network device transmitter can send a message to a user equipment. The receiver 520 receives information or data transmitted or sent by another device. For example, a user equipment can receive a message from a network device.
[0225] The implementations as discussed above will apply to a wireless communication. FIG. 6 shows an example of a wireless communication system (e.g., a 5G or NR cellular network) that includes a base station 620 and one or more user equipment (UE) 611, 612 and 613. In some embodiments, the UEs access the BS (e.g., the network) using a communication link to the network (sometimes called uplink direction, as depicted by dashed arrows 631, 632, 633) , which then enables subsequent communication (e.g., shown in the direction from the network to the UEs, sometimes called downlink direction, shown by arrows 641, 642, 643) from the BS to the UEs. In some embodiments, the BS send information to the UEs (sometimes called downlink direction, as depicted by arrows 641, 642, 643) , which then enables subsequent communication (e.g., shown in the direction from the UEs to the BS, sometimes called uplink direction, shown by dashed arrows 631, 632, 633) from the UEs to the BS. The UE may be, for example, a smartphone, a tablet, a mobile computer, a machine to machine (M2M) device, an Internet of Things (IoT) device, and so on.
[0226] Therefore, it will be appreciated by one of ordinary skill in the art that the present document provides technical solutions that may be implemented by embodiments for coherent joint transmission (CJT) calibration with multiple transmission-reception points (TRPs) . In one beneficial aspect, the disclosed techniques may be used to enable identification corresponding or linked UL / DL reference signals for the measurement of inter-TRP misalignment information (e.g., delay / frequency / phase information) . In another beneficial aspect, the disclosed techniques may be used to determine linkage, association, or correspondence between a calibration report and a CSI report, both of which may be communicated at different times in some examples. In yet another beneficial aspect, the disclosed techniques may be used to enable calculation of CSI report information based on information included in a linked calibration report, thus improving the accuracy of reported information.
[0227] Some of the embodiments described herein are described in the general context of methods or processes, which may be implemented in one embodiment by a computer program product, embodied in a computer-readable medium, including computer-executable instructions, such as program code, executed by computers in networked environments. A computer-readable medium may include removable and non-removable storage devices including, but not limited to, Read Only Memory (ROM) , Random Access Memory (RAM) , compact discs (CDs) , digital versatile discs (DVD) , etc. Therefore, the computer-readable media can include a non-transitory storage media. Generally, program modules may include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. Computer-or processor-executable instructions, associated data structures, and program modules represent examples of program code for executing steps of the methods disclosed herein. The particular sequence of such executable instructions or associated data structures represents examples of corresponding acts for implementing the functions described in such steps or processes.
[0228] Some of the disclosed embodiments can be implemented as devices or modules using hardware circuits, software, or combinations thereof. For example, a hardware circuit implementation can include discrete analog and / or digital components that are, for example, integrated as part of a printed circuit board. Alternatively, or additionally, the disclosed components or modules can be implemented as an Application Specific Integrated Circuit (ASIC) and / or as a Field Programmable Gate Array (FPGA) device. Some implementations may additionally or alternatively include a digital signal processor (DSP) that is a specialized microprocessor with an architecture optimized for the operational needs of digital signal processing associated with the disclosed functionalities of this application. Similarly, the various components or sub-components within each module may be implemented in software, hardware or firmware. The connectivity between the modules and / or components within the modules may be provided using any one of the connectivity methods and media that is known in the art, including, but not limited to, communications over the Internet, wired, or wireless networks using the appropriate protocols.
[0229] While this document contains many specifics, these should not be construed as limitations on the scope of an invention that is claimed or of what may be claimed, but rather as descriptions of features specific to particular embodiments. Certain features that are described in this document in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable sub-combination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a sub-combination or a variation of a sub-combination. Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results.
[0230] Only a few implementations and examples are described and other implementations, enhancements and variations can be made based on what is described and illustrated in this document.
Claims
1.A wireless communication method, comprising:receiving, by a wireless communication device, a channel state information (CSI) reporting configuration signaling, wherein the CSI reporting configuration signaling is associated with at least one of a reference signal (RS) resource or a reference signal resource set;determining, by the wireless communication device, a CSI according to the CSI reporting configuration signaling, wherein the CSI comprises at least one of: a CSI-RS resource indicator (CRI) , a rank indicator (RI) , a precoding matrix indicator (PMI) , a channel quality indicator (CQI) , a delay misalignment information, a frequency misalignment information, or a phase misalignment information; andreporting, by the wireless communication device, the CSI, to a network device.2.A wireless communication method, comprising:transmitting, by a network device, a channel state information (CSI) reporting configuration signaling, wherein the CSI reporting configuration signaling comprises at least one of a reference signal (RS) resource or a reference signal resource set; andreceiving, by the network device, a CSI from a wireless communication device, wherein the CSI is determined according to the CSI reporting configuration signaling, and wherein the CSI comprises at least one of: a CSI-RS resource indicator (CRI) , a rank indicator (RI) , a precoding matrix indicator (PMI) , a channel quality indicator (CQI) , a delay misalignment information, a frequency misalignment information, or a phase misalignment information.3.The method of any one of claims 1-2, wherein the CSI reporting configuration signaling comprises at least one of: a CSI reporting setting, a trigger state, or a downlink control information (DCI) .4.The method of claim 3, wherein the CSI reporting setting is associated with at least one of: one or more CSI-RS resource sets, or one or more sounding reference signal (SRS) resource sets;and wherein each CSI-RS resource set is associated with RCSI-RS≥1 CSI-RS resources, wherein each CSI-RS resource is configured with PCSI-RS≥1 CSI-RS ports;and wherein each SRS resource set is associated with RSRS≥1 SRS resources, wherein each SRS resource is configured with PSRS≥1 SRS ports.5.The method of claim 4, wherein each SRS port configured within one of the SRS resources associated with one of the one or more SRS resource sets is associated with one or more or all the CSI-RS ports configured within each of the CSI-RS resources associated with one of the one or more CSI-RS resource sets.6.The method of claim 5, wherein an i-th SRS port configured across all the SRS resources associated with one of the SRS resource sets is associated with [ (i-1) n+1] -th to in-th CSI-RS ports configured within each of the CSI-RS resources associated with one of the CSI-RS resource sets, wherein n is an integer equal or greater than 1.7.The method of any of claims 3-4, wherein the trigger state is associated with the CSI reporting setting, the trigger state is associated with one CSI-RS resource set out of the one or more CSI-RS resource sets associated with the CSI reporting setting, and the trigger state is associated with one SRS resource set out of the one or more SRS resource sets associated with the CSI reporting setting.8.The method of claim 7, wherein the trigger state is associated with one or more or all the SRS resources associated with the SRS resource set associated with the trigger state, and wherein the trigger state is associated with one or more or all the SRS ports configured within each SRS resource associated with the trigger state.9.The method of claim 8, wherein the trigger state comprises at least one of: an SRS resource set identifier, an SRS resource identifier, an SRS port identifier, a bitmap indicating the SRS resources associated with the trigger state, a bitmap indicating the SRS ports associated with the trigger state, a combinatorial number indicating the SRS resources associated with the trigger state, or a combinatorial number indicating the SRS ports associated with the trigger state.10.The method of any of claims 7-9, wherein the trigger state is associated with one or more or all the CSI-RS ports configured within each CSI-RS resource associated with the CSI-RS resource set associated with the trigger state.11.The method of claim 10, wherein the trigger state comprises at least one of: a CSI-RS resource set identifier, a CSI-RS resource identifier, a CSI-RS port identifier, a bitmap indicating the CSI-RS ports associated with the trigger state, or a combinatorial number indicating the CSI-RS ports associated with the trigger state.12.The method of any of claims 7-11, wherein each SRS port associated with the trigger state is associated with one or more all the CSI-RS ports associated with the trigger state configured within each CSI-RS resource associated with the trigger state.13.The method of claim 12, wherein the i-th SRS port associated with the trigger state is associated with the [ (i-1) n+1] -th to in-th CSI-RS ports associated with the trigger state configured within each CSI-RS resource associated with the trigger state, and wherein n is an integer equal or greater than 1.14.The method of any of claims 2-13, wherein the CSI reporting setting or the trigger state comprises at least one of: an indicator of whether the associated CSI-RS ports are precoded or not, or an indicator of whether there exists one-to-one or one-to-multiple mapping relationship between the associated CSI-RS ports and SRS ports.15.The method of any of claims 2-14, wherein the CSI comprises at least one of: one or more sets of phase misalignment information, a number of the sets of phase misalignment information, an indicator of one or more CSI-RS ports, an indicator of one or more SRS resources, or an indicator of one or more SRS ports.16.The method of any of claims 1-11, wherein the DCI is associated with the trigger state, and wherein the DCI triggers at least one of: the wireless communication device reporting the CSI, a transmission the CSI-RS resources associated with the trigger state, or a transmission of the SRS resources associated with the trigger state, simultaneously.17.The method of any of claims 1-11, wherein the DCI is associated with the trigger state; and wherein the trigger state is associated with a last transmission occasion of the SRS resources associated with the trigger state or the CSI reporting setting no later than a first time instant, or the trigger state is associated with a first transmission occasion of the SRS resources associated with the trigger state or the CSI reporting setting no earlier than a second time instant; and wherein the first time instant is determined by at least one of: a time instant of the DCI triggering the CSI, a numerology of a PDCCH carrying the DCI, a numerology of a PUCCH / PUSCH carrying the CSI or the transmission occasion of the SRS resources, a first time length, or a first UE capability; and wherein the second time instant is determined by at least one of: a last symbol of a PUCCH / PUSCH carrying the CSI or the transmission occasion of the SRS resources, a second time length, or a second UE capability.18.The method of any of claims 1-11, wherein the DCI is associated with the trigger state, and the wireless communication device only reports a CSI when there exists at least one transmission occasion of the SRS resources associated with the trigger state or the CSI reporting setting no earlier than a first time instant and / or no later than a second time instant, otherwise, the wireless communication device drops the CSI; and wherein the first time instant is determined by at least one of: a time instant of the DCI triggering the CSI, a numerology of a PDCCH carrying the DCI, or a numerology of a PUCCH / PUSCH carrying the CSI or the transmission occasion of the SRS resources, a first time length, or a first UE capability; and wherein the second time instant is determined by at least one of: a time instant of the DCI triggering the CSI, a numerology of a PDCCH carrying the DCI, or a numerology of a PUCCH / PUSCH carrying the CSI or the transmission occasion of the SRS resources, or a second time length, or a second UE capability.19.The method of any of claims 1-11, wherein the DCI is associated with the trigger state, and wherein the wireless communication device expects that a transmission occasion of the CSI-RS resources associated with the trigger state or the CSI reporting setting occurs no earlier than a time instant and / or a time triggering offset of the CSI-RS resources associated with the trigger state is no smaller than a threshold value X, and wherein the time instant is determined by at least one of: a time instant of the DCI triggering the CSI, a time length, or a UE capability.20.The method of claim 3, wherein the DCI triggers a transmission of one or more SRS resources, or one or more SRS resource sets, and wherein the DCI is associated with the CSI reporting setting and / or the one or more SRS resources or the one or more SRS resource sets are associated with the CSI reporting setting.21.The method of any of claims 1-3, wherein the CSI is associated with a number of CSI processing units (CPUs) , and wherein the number of CPUs is determined by at least one of: a number of TRPs, a number of CSI-RS resources or ports associated with the CSI reporting setting or the trigger state, a number of SRS resources or ports associated with the CSI reporting setting or the trigger state, a predefined value, or a UE capability.22.The method of any of claims 1-3, wherein the CSI is associated with a number of active resources and a number of active ports; and wherein the number of active resources or the number of active ports is determined by at least one of: a number of CSI-RS resources or ports associated with the CSI reporting setting or the trigger state, a number of SRS resources or ports associated with the CSI reporting setting or the trigger state, a predefined value, or a UE capability.23.The method of any of claims 1-4, wherein the CSI reporting setting or the trigger state is associated with at least one of: a set of delay offsets (DO) , a set of frequency offsets (FO) , a frequency granularity used for PDSCH pre-compensation, or a time granularity used for PDSCH pre-compensation, wherein each CSI-RS resource associated with the CSI reporting setting or trigger state is associated with a DO and / or a FO in the set of DOs and / or FOs.24.The method of claim 4, wherein each CSI-RS resource set is associated with at least one of: a set of DOs, a set of FOs, a frequency granularity used for PDSCH pre-compensation, or a time granularity used for PDSCH pre-compensation, wherein each CSI-RS resource associated with the CSI-RS resource set is associated with a DO and / or a FO in the set of DOs and / or FOs.25.The method of claim 4, each CSI-RS resource is associated with at least one of: a DO, a FO, a frequency granularity used for PDSCH pre-compensation, or a time granularity used for PDSCH pre-compensation.26.The method of any of claims 1-4 and 23, wherein the CSI reporting configuration signaling comprises at least a first CSI reporting setting and a second CSI reporting setting, wherein the first CSI reporting setting is associated with the second CSI setting, and wherein the first CSI reporting setting is associated with a first CSI comprising at least one of: a CRI, a RI, a PMI, or a CQI, the second CSI reporting setting is associated with a second CSI comprising at least one of: a delay misalignment information comprising at least a set of DOs, a frequency misalignment information comprising at least a set of FOs, or a phase misalignment information, wherein the CRI, the RI, the PMI, or the CQI in the first CSI is determined by at least one of: the delay misalignment information in the second CSI, the frequency misalignment information in the second CSI, or the phase misalignment in the second CSI.27.The method of claim 26, wherein the first CSI reporting setting or the first CSI is associated with a last report of the second CSI no later than a time instant, wherein the time instant is determined by at least one of: a time instant of a DCI triggering the first CSI or indicating the first CSI reporting setting, a numerology of a PDSCH carrying the DCI, a numerology of a PUSCH carrying the first CSI, a time length, or a UE capability.28.The method of any claim 26, wherein the wireless communication device reports the first CSI only if there exists at least one valid report of the second CSI no earlier than a first time instant and / or no later than a second time instant, wherein the first time instant or the second time instant is determined by at least one of: a time instant of a DCI triggering the first CSI or indicating the first CSI reporting setting, a numerology of a PDSCH carrying the DCI, a numerology of a PUSCH carrying the first CSI, a first time length, a second time length, a first UE capability, or a second UE capability.29.The method of any of claim 1-4, and 23, wherein the trigger state is associated with at least a first CSI reporting setting and a second CSI reporting setting, wherein the first CSI reporting setting is associated with the second CSI setting, and wherein the first CSI reporting setting is associated with a first CSI comprising at least one of: a CRI, a RI, a PMI, or a CQI, the second CSI reporting setting is associated with a second CSI comprising at least one of: a delay misalignment information comprising at least a set of FOs, a frequency misalignment information comprising at least a set of FOs, or a phase misalignment information, wherein the wherein the CRI, the RI, the PMI, or the CQI in the first CSI is determined by at least one of: the delay misalignment information in the second CSI, the frequency misalignment information in the second CSI, or the phase misalignment in the second CSI.30.The method of any of claims 26 and 29, wherein each CSI-RS resource or CSI-RS resource set associated with the first CSI reporting setting is associated with a CSI-RS or CSI-RS resource set associated with the second CSI reporting setting.31.The method of any of claims 26 and 29, wherein each CSI-RS resource or CSI-RS resource set associated with the first CSI reporting setting is associated with a DO or / and a FO in the set of DOs and / or FOs of the second CSI.32.The method of any of claims 1-4 and 23-25, wherein at least one of the CRI, RI, PMI, or CQI of the CSI is determined by at least one of: channel estimates based on the CSI-RS resources, the time location of the CSI-RS resources, the frequency location of the CSI-RS resources, the DOs and / or FOs associated with the CSI-RS resources, the time granularity used for PDSCH pre-compensation, the frequency granularity used for PDSCH pre-compensation, a reference time point, or a reference frequency point.33.The method of claim 32, wherein at least one of the CRI, RI, PMI, or CQI of the CSI is determined by at least one of the following precoding assumptions: whereinis a vector of symbols transmitted on antenna ports [3000, …, 3000+P-1] of each of N0 CSI-RS resources corresponding to a frequency point k and a time point l, x (k, l) = [x (0) (k, l) … x (v-1) (k, l) ] T is a vector of PDSCH symbols corresponding to a frequency point k and a time point l, P is a number of CSI-RS ports, are indices of CSI-RS resources, is a precoding matrix corresponding to a CSI-RS resource with index σn, k0 is the reference frequency point, (k-k0) is the number of frequency units between the time point k and the reference time point k0, Δf is a frequency unit, is the DO associated with the CSI-RS resource with index σ0, l0 is a reference time point, Δt is a time unit, (l-l0) denotes the number of time units between the time point l and the reference time point l0, is the FO associated with the CSI-RS resource with index σn.34.The method of any of claims 26, 29, and 31, wherein at least one of the CRI, RI, PMI, or CQI of the first CSI is determined by at least one of: channel estimates based on the CSI-RS resources associated with the first CSI reporting setting, a time location of the CSI-RS resources associated with the first CSI reporting setting, a frequency location of the CSI-RS resources associated with the first CSI reporting setting, the DOs and / or FOs associated with the CSI-RS resources associated with the first CSI reporting setting, the time granularity used for PDSCH pre-compensation, the frequency granularity used for PDSCH pre-compensation, a reference time point, or a reference frequency point.35.The method of claim 34, wherein at least one of the CRI, RI, PMI, or CQI of the first CSI is determined according to one of the following precoding assumptions: whereinis a vector of symbols transmitted on antenna ports [3000, …, 3000+P-1] of each of N0 CSI-RS resources associated with the first CSI reporting setting corresponding to a frequency point k and a time point l, x (k, l) = [x (0) (k, l) … x (v-1) (k, l) ] T is a vector of PDSCH symbols corresponding to a frequency point k and a time point l, P is a number of CSI-RS ports, are indices of the CSI-RS resources associated with the first CSI reporting setting, is a precoding matrix corresponding to a CSI-RS resource associated with the first CSI reporting setting with index σn, k0 is the reference frequency point, (k-k0) is the number of frequency units between the time point kand the reference time point k0, Δf is a frequency unit, is the DO associated with the CSI-RS resource with index σn, l0 is a reference time point, Δt is a time unit, (l-l0) denotes the number of time units between the time point l and the reference time point l0, is the FO associated with the CSI-RS resource with index σn.36.An apparatus for wireless communication comprising one or more processors configured to cause the apparatus to implement a method recited in one or more of claims 1 to 35.37.A non-transitory computer-readable program storage medium having code stored thereon, the code, when executed by one or more processors, causing the processor to implement a method recited in one or more of claims 1 to 35.
Citation Information
Patent Citations
Method and apparatus for estimating channel in wireless communication system
CN104604283A
Channel state feedback method and apparatus in communication system
US20200169374A1
Method and apparatus for reporting channel state in wireless communication system
US20230299914A1
Channel state information (CSI) codebook for coherent joint transmission (CJT)
US20240171350A1
Channel state information feedback on multiple channel measurement resources or coherent joint transmissions
WO2024032306A1