Techniques for reporting channel state information
By configuring UE to report CSI using resources from candidate cells, the solution addresses the challenge of maintaining downlink performance during mobility, enhancing communication efficiency through timely and accurate reporting.
Patent Information
- Application Number
- PCT/CN2024/106629
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-10-30
AI Technical Summary
Existing wireless communication technologies face challenges in maintaining downlink transmission performance during user equipment (UE) mobility scenarios, such as when switching between cells, due to insufficient CSI reporting techniques.
The proposed solution involves configuring UE to perform CSI reporting based on resources associated with candidate cells, using semi-persistent or aperiodic CSI-RS resources or resource sets, and transmitting CSI reports via uplink control information (UCI) to maintain downlink performance during cell switching.
This approach enhances downlink transmission performance by allowing timely and accurate CSI reporting, reducing performance loss during UE mobility, thereby improving communication efficiency.
Smart Images

Figure CN2024106629_30102025_PF_FP_ABST
Abstract
Description
TECHNIQUES FOR REPORTING CHANNEL STATE INFORMATIONTECHNICAL FIELD
[0001] This document is directed generally to wireless communications.BACKGROUND
[0002] Wireless communication technologies are moving the world toward an increasingly connected, networked society. The rapid growth of wireless communications and advances in technology has led to greater demand for capacity and connectivity. Other aspects, such as energy consumption, device cost, spectral efficiency, and latency are also important to meeting the needs of various communication scenarios. In comparison with existing wireless networks, next-generation systems and wireless communication techniques need to provide support for an increased number of users and devices, as well as support an increasingly mobile society.SUMMARY
[0003] This document provides techniques for configuring and reporting channel state information (CSI) .
[0004] In some aspects, the techniques described herein relate to a method of wireless communication including: receiving, by a wireless device from a network node, a first information; performing a measurement in response to receiving the first information; and transmitting, by the wireless device, a second information based on the measurement.
[0005] In some aspects, the techniques described herein relate to a method of wireless communication including: transmitting, by a network node to a wireless device, a first information; and receiving, from the wireless device, a second information based on a measurement performed by the wireless device in response to the first information.
[0006] In another exemplary aspect, the above-described methods are embodied in the form of processor-executable code and stored in a computer-readable program medium.
[0007] In yet another exemplary aspect, a device that is configured or operable to perform the above-described methods is disclosed.
[0008] The above and other aspects and their implementations are described in greater detail in the drawings, the descriptions, and the claims.BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Various features and characteristics of the technology will become more apparent to those skilled in the art from a study of the Detailed Description in conjunction with the drawings. Embodiments of the technology are illustrated by way of example and not limitation in the drawings, in which like references may indicate similar elements.
[0010] FIG. 1 shows an example of a wireless communication system, in accordance with embodiments of the present disclosure.
[0011] FIG. 2 shows an example wireless communication system including a user equipment (UE) and multiple cells, in accordance with embodiments of the present disclosure.
[0012] FIG. 3 is a flow diagram illustrating an example process for wireless communication, in accordance with embodiments of the present disclosure.
[0013] FIG. 4 is a flow diagram illustrating an example process for wireless communication, in accordance with embodiments of the present disclosure.
[0014] FIG. 5 is a block diagram representation of a portion of an apparatus based on some embodiments of the disclosed technology.DETAILED DESCRIPTION
[0015] Section headings are used in the present document only for ease of understanding and do not limit the scope of the embodiments to the section in which they are described. Furthermore, while embodiments are described with reference to 5G examples, the disclosed techniques may be applied to wireless systems that use protocols other than 5G or 3GPP protocols.
[0016] [1] FIG. 1 shows an example of a wireless communication system (e.g., a long-term evolution (LTE) , 5G or NR cellular network) that includes a BS 120 and one or more user equipment (UE) 111, 112, and 113. In some embodiments, the uplink (UL) transmissions (131, 132, 133) can include uplink control information (UCI) , higher layer signaling (e.g., UE assistance information or UE capability) , or uplink information. In some embodiments, the downlink (DL) transmissions (141, 142, 143) can include Downlink Control Information (DCI) or higher layer signaling (e.g., Radio Resource Control (RRC) of MAC Control Element (MAC-CE) ) or downlink information. The UE may be, for example, a smartphone, a tablet, a mobile computer, a machine-to-machine (M2M) device, a terminal, a mobile device, an Internet of Things (IoT) device, and so on.
[0017] The UEs 111, 112, or 113 can perform CSI measurements based on a CSI reference signal (CSI-RS) and can report a corresponding report to the BS 120. The UEs 111-113 can be configured with one or more CSI report configurations, for example by CSI-ReportConfig signaling. The CSI-ReportConfig is associated with one or more CSI-RS resource settings by CSI-resourceConfigID. The CSI-RS resource setting is configured by CSI-ResourceConfig signaling.
[0018] To perform a CSI report, a UE (e.g., UE 111-113) first receives a control signaling, such as radio resource control (RRC) signaling from a network node (e.g., BS 120) . The control signaling includes one or more CSI report configurations. The UE performs a CSI report according to the one or more CSI report configurations.
[0019] FIG. 2 shows an example wireless communication system 200 including a UE 202 and multiple cells 204-210. In wireless communications, a service area of a wireless network is divided into small geographical areas called cells. Each of the cells 204-210 include one or more BSs, e.g., the BS 120 of FIG. 1. The UE 202 can be similar to the UES 111-113 in FIG. 1 and can communicate with BSs in each of the cells 204-210.
[0020] The UE 202 can move from one cell to another, for instance when traveling in a vehicle. For example, the UE 202 in FIG. 2 moves from cell 208 to cell 204, then to cell 210 and 206. In existing methods, the UE 202 rebuilds a transmission link when the UE 202 switches from one cell to another cell. In such a case, the CSI for the transmission is configured, and then measured and then reported by the UE 202. However, if CSI reporting is triggered after switching cells, then the UE 202 may experience some performance loss. Thus, techniques are needed to maintain downlink transmission performance should for UE mobility scenarios.
[0021] The UE 202 can be configured to use synchronization signal blocks (SSBs) when switching from a serving cell (e.g., 208) to a candidate cell (e.g., 204) . For SSB-based CSI reporting for mobility scenarios, the downlink beam can be switched quickly when switching cells. When SSBs are configured for mobility CSI reporting, the SSB can be received from the serving cell or the candidate cells. The report content is configured as reference signal received power (RSRP) reporting, where the received power of the reference signal is measured and reported. A time offset can be configured for one parameter to determine the uplink transmission slot or time resources for semi-persistent or aperiodic reporting.
[0022] CSI Resource Configuration and Reporting for Mobility
[0023] As described above, current CSI reporting techniques are insufficient for situations where a UE is mobile, e.g., when a UE switches cells from a current serving cell to a candidate cell. Embodiments of the present technology are directed to improving performance for UE mobility scenarios by configuring the UE to perform CSI reporting based on resources associated with one or more candidate cells. By reporting CSI using resources associated with candidate cells, downlink performance can be maintained when the UE switches cells.
[0024] Embodiments of the disclosed technology can be described with reference to FIG. 2. As shown, the UE 202 moves from one cell to another cell. When the UE 202 is in the cell 208 (also marked as physical cell-3) , then the cell 208 is the serving cell, and the other cells 204, 206, and 210, if configured for CSI reporting for mobility, are the candidate cells.
[0025] Assuming the UE 202 is served by the cell 208, the UE 202 receives a trigger state information from a BS (also referred to as gnodeB, or gNB) in the cell 208. The trigger state information triggers a CSI reporting for UE mobility. At least one CSI-RS resource or resource set is configured for the CSI reporting, for example by higher-layer signaling. UE performs a CSI measurement using the CSI-RS resource or resource set and reports a result to the gNB.
[0026] In some embodiments, the triggered CSI reporting is a semi-persistent reporting or aperiodic CSI reporting. A number of semi-persistent or aperiodic CSI-RS resources or resource sets for channel measurement can be configured for the CSI reporting.
[0027] Note that cells 204-210 in Figure 2 are labeled as physical cells, but embodiments of the present technology involving “cells” are not limited to physical cells (e.g., associated with a physical cell index) . Cells, such as candidate cells or serving cells, may be based on communication nodes generally, including small cells or larger physical cells.
[0028] The CSI-RS resource or resource set is configured from at least one candidate cell (e.g., cell 204, 206, or 210) . In some implementations, if a CSI-RS resource or set from one candidate cell is configured, the candidate cell is the cell which the UE 202 will switch to. If CSI-RS resources or sets from more than one candidate cell are configured, then the UE 202 will switch to one of the candidate cells.
[0029] At least one candidate cell is associated with at least one CSI-RS resource or resource set. For example, multiple candidate cells can be associated with a number of CSI-RS resource sets, where each candidate cell is associated with one CSI-RS resource set. As another example, multiple candidate cells are associated with one CSI-RS resource set, where each candidate cell is associated with one CSI-RS resource in the one CSI-RS resource set. As another example, a candidate cell can be associated with multiple CSI-RS resources or sets. The association between candidate cells and CSI-RS resources or sets can be configured in a CSI-RS resource configuration or CSI reporting configuration by higher layer signaling, e.g., RRC.
[0030] In some embodiments, for reporting associated with a candidate cell, the reporting is carried by uplink control information (UCI) in the physical uplink shared channel (PUSCH) . The UCI can be triggered by the DCI that triggered the CSI reporting. Furthermore, the DCI can be signaling that is transmitted before a cell switch signaling.
[0031] In some embodiments, for reporting associated with a candidate cell, the reporting is carried by a UCI in PUSCH. In this example, the DCI from the serving cell is the signaling that triggered the CSI reporting. The DCI can also trigger a PUSCH transmission to the candidate cell which the UE will switch to.
[0032] In some embodiments, the UE performs a measurement using the CSI-RS resource or resource set associated with the candidate cell, and then reports the measurement result..
[0033] To indicate the association between CSI-RS resources or sets and candidate cells, the CSI-RS can be configured with a candidate index, such as the cell index. For example, different CSI-RS resources or resource sets can be configured with different cell indexes.
[0034] In another example, the candidate index is a frequency parameter. For mobility, different candidate cells may be scheduled on different frequency resources. For a candidate cell, related frequency parameters, such physical resource block (PRB) , bandwidth part (BWP) , subband, frequency band, carrier frequency, PRBs, physical resource group (PRG) or the carrier for CSI-RS or SSB can be configured to be associated with the candidate cell. In some embodiments, the candidate index is associated with a physical cell index (PCI) , where the PCI is associated with a candidate cell. If more than one candidate cell is configured for channel measurement or CSI reporting, more than one candidate index can be configured.
[0035] In some embodiments, the CSI-RS resource or resource sets associated with a same candidate cell are configured with a reference signal of a transmission configuration indicator (TCI) state determination, where the reference signal is configured as a SSB or CSI-RS resource from the candidate cell.
[0036] Examples of CSI reporting
[0037] For CSI reporting of mobility, several example methods can be considered, as follows:
[0038] 1. The UE (e.g., UE 202) requests to perform or initiate CSI reporting or cell switching. For one request, multiple indication signalings are used for the CSI reporting indication, for example DCI, MAC CE, or RRC. The indication signaling can be a downlink indication signaling. Each indication signaling includes one trigger state, the one trigger state triggers one CSI reporting, and at least one CSI-RS resource or resource set is configured for the one CSI reporting. The UE then receives the related signaling, performs measurements, and performs CSI reporting. Each indication signaling is associated with one candidate cell.
[0039] 2. The UE (e.g., UE 202) requests to perform or initiate CSI reporting or cell switching. For one request, one indication signaling is used for the CSI reporting indication, such as described above. The indication signaling includes multiple trigger states, where each trigger state triggers one CSI reporting, and at least one CSI-RS resource or resource set is configured for the one CSI reporting. The UE receives the related signaling, performs measurements, and performs CSI reporting. Each trigger state is associated with one candidate cell.
[0040] 3. The UE (e.g., UE 202) requests to perform or initiate CSI reporting or cell switching. For one request, one indication signaling is used for the CSI reporting indication, such as described above. The indication signaling includes one trigger state, and the trigger state triggers multiple instances of CSI reporting, and at least one CSI-RS resource or resource set is configured for the one CSI reporting. The UE receives the related signaling, performs measurements, and performs CSI reporting. Each CSI reporting instance is associated with one candidate cell.
[0041] 4. The UE (e.g., UE 202) requests to perform or initiate CSI reporting or cell switching. For one request, one indication signaling is used for the CSI reporting indication, such as described above. The indication signaling includes one trigger state, and the one trigger state triggers one CSI reporting instance. Multiple CSI-RS resources or resource sets are configured for the one CSI reporting. The UE receives the related signaling, performs measurements, and performs CSI reporting. Each CSI-RS resource or resource set is associated with one candidate cell.
[0042] 5. The UE (e.g., UE 202) requests to perform or initiate CSI reporting or cell switching. For one request, one indication signaling is used for the CSI reporting indication, such as described above. The indication signaling includes one trigger state, and the trigger state triggers one CSI reporting instance. At least one CSI-RS resource or resource set is configured for the one CSI reporting. The UE receives the related signaling, performs measurements, and performs CSI reporting. Each CSI-RS resource, resource set, group of CSI-RS resources, or group of CSI-RS resource sets is associated with one candidate cell.
[0043] In some embodiments, serving cell information is included in the CSI reporting for mobility. The related reporting parameters can be configured (e.g., by the indication signaling described above) to include the parameters of a serving cell. If included, then CSI for the serving cell can be included.
[0044] In some embodiments, a CSI-RS resource set is associated with one candidate cell. In some embodiments a CSI-RS resource set includes multiple CSI-RS resources, where the resources are associated with groups of resources. Each group is associated with one candidate cell.
[0045] In some embodiments, indication signaling can be an indication of the CSI reporting. The indication signaling can be an indication of a cell switch (e.g., to the candidate cell) .
[0046] Reporting Content
[0047] For CSI reporting for UE mobility, the reporting content should be determined. For instance, there may be reporting associated with multiple candidate cells –to reduce the amount of data being transmitted, it may be desired to include or exclude certain information in a CSI report. Similarly, some data may be more or less relevant as the UE moves between cells. In some embodiments, at least one of a CSI-RS resource indicator (CRI) , rank indicator (RI) , channel quality indicator (CQI) , precoding matrix indicator (PMI) is included in the reporting content.
[0048] In some embodiments, one report is transmitted for one candidate cell, or for all candidate cells. For example, one report can be transmitted for the best cell or best two cells (for example associated with a candidate cell ID. In another example, one report is transmitted for all candidate cells. In another example, one report is transmitted for each candidate cell.
[0049] In some embodiments, reporting is more detailed. For example, RI, CQI, or PMI per resource per cell can be reported.
[0050] In some embodiments, a related parameter to a resource or set is reported per cell. For example, a CRI with a higher modulation and coding scheme (MCS) .
[0051] In some embodiments, the UE reports a related parameter of a candidate cell with the highest MCS of all the configured resources and cells.
[0052] In some embodiments, the UE determines whether RI is included in the CSI report. The rank can be common among candidate cells, or candidate cell-specific. For example, the lower-layer triggered mobility (LTM) applies mainly for a UE near the edge of a cell, where a transmission layer may be no more than 2 layers. The UE can make a determination regarding the number of layers supported, e.g., that only one layer is supported, and determine that RI is not needed in the report, or to apply the same RI as the serving cell by default.
[0053] If the UE determines to include RI in the CSI report, e.g., if more layers or different RI with a serving cell are supported, RI can be reported according to at least one of the following:
[0054] ● The UE reports the RI associated with the max rank.
[0055] ● The RI is reported as a cell group common information. For example, the reported RI may be the same for each cell.
[0056] ● A differential RI for a candidate cell from the serving cell.
[0057] ● The RI can be reported per cell.
[0058] In some embodiments, the CQI is included in the CSI report. The CQI can be cell specific information. In some embodiments, differential reporting for the candidate cells is compared with serving cell.
[0059] In some embodiments, scaled granularity for reporting CQI. For example, a table with fewer entries corresponding to each MCS level can be used. In another example, a reported MCS level associated with a transmission to the serving cell, and overhead is associated with a max number of MCS level, e.g., 64QAM.
[0060] Once the CSI report is triggered, whether to include CQI in the report can depend on whether or not a cell switch command is received by the UE.
[0061] In some embodiments, before a CSC, a CQI for each candidate cell is reported, such as the largest value (or N largest values) of CQI. Smaller values of CQI may not reported, because those candidate cells will likely have worse performance than the candidate cells with the higher MCS with the same RI.
[0062] In some embodiments, one CQI is reported for all candidate cells. In some embodiments, once CQI is reported for each RI. For example, a first CQI index a1 for RI=1, and a second CQI index a2 for RI=2
[0063] In some embodiments, before a CSC, a wideband CQI of each candidate cell is reported.
[0064] For example, differential reporting may be used when reporting wideband CQI. The differential reporting is reported relative to a reference CQI. In some embodiments, the CQI for the serving cell is the reference CQI. Other CQI for candidate cells can be reported as a differential value or index.
[0065] In some embodiments, another CQI is configured or predefined as the reference CQI. For example, the CQI associated with a first candidate cell, a first CSI-RS resource set or a highest / lowest CQI index.
[0066] In some embodiments, if CSI reporting for serving cell is not configured, the CQI for a previous (e.g., most recent) CSI reporting for PDSCH (physical downlink shared channel) can be used as a reference. Differential CQI indexes for the candidate cell can then be reported based on this reference CQI.
[0067] The reference CQI can be reported using full indexes for MCS indexes. The size of other CQI reporting can be 2 or 3 bits for each CQI, such as the nearest several CQI indexes.
[0068] Differential reporting for wideband CQI can be reported with scaled granularity, such as using a scaled MCS / CQI (modulation and coding index, channel quality indicator) table for LTM with fewer indexes. For example, one table for one or two MCS levels can be used, e.g., one table for 64 QAM (quadrature amplitude modulation) , or one table for QPSK (quadrature phase shift keying) and another table for 16 QAM. In another example, some MCS / CQI indexes are compared with current PDSCH MCS for the serving cell, or all MCS indexes are used for LTM CQI reporting, e.g., forming a comb of indexes from the current table.
[0069] In some embodiments, regular (e.g., absolute) reporting, each CQI is reported for each candidate cell. Similar to differential reporting, as described above, at least one of the following CQI can be reported.
[0070] ● Each CQI index from a table with all the MCS indexes; or
[0071] ● Scaled granularity.
[0072] Reporting content for CSI reporting may need to be different after a CSC. For instance, it may be needed to consider whether to perform periodic, semipersistent, or aperiodic reporting. In some embodiments, each CQI of each candidate cell can be reported regardless of the CSC. The LTM CSI can be reported to the new cell.
[0073] In some embodiments, the reference CQI for differential CQI reporting is different than before a CSC is received. In some embodiments, the same reporting content as before CSC, for LTM CSI reporting configuration is used.
[0074] In some embodiments, a CSC triggers a CSI reporting for the serving cell. The CSI reporting can include CQI reporting for the new serving cell.
[0075] In some embodiments, CSI reporting is deactivated or ignored if CSC is received before UE performs CSI reporting. In some embodiments, CSC is restricted. For example, if LTM-CSI reporting is triggered, and a CSC is then received, then the CSC is not activated before the LTM-CSI reporting occurs.
[0076] In some embodiments, for PMI reporting, only type I codebook is reported. To reduce bandwidth, type II codebook can be excluded.
[0077] In some embodiments, cyclic precoding is used without a PMI indication.
[0078] For wideband precoding, type I codebook can be supported. The parameters O1 and O2 can be set to 1, and the oversampling factor can be set to 1, such that oversampling is not needed. N1’ , N2’ are configured as smaller values than max antenna ports N1 and N2.
[0079] In some embodiments, subband precoding is not supported.
[0080] A two-part UCI can carry the CSI report. The two-part UCI includes part 1 and part 2 and can be configured to carry various reporting information for both the serving cell and the candidate cells.
[0081] In some embodiments, all reports for all cells are included in part 1, e.g., RI, CQI, and PMI. Alternatively, reporting for the serving cell is included in part 1, and other cells in part 2.
[0082] In some embodiments, RI reporting is included in part 1, and PMI in part 2. All CQI can be included in part 1, or all CQI in part 2. In some embodiments, CQI for serving cell is reported in part 1, and CQI for candidate cells in part 2.
[0083] Four example two-part UCI reporting schemes are given below:
[0084] Case 1: If CQI reporting is limited, for example to several bits, then CQI can be in part 1. CRI is reported in part 1, RI is reported in part 1 if supported, CQI in part 1, and Type I PMI in part 2, if supported.
[0085] Case 2: The CRI, RI, CQI for the reference cell, for differential reporting, are included in part 1. If the serving cell is reported in LTM CSI reporting, whether to choose another reference CSI parameter can be indicated in part 1.
[0086] In this case, all CRI associated with a candidate cell ID or reference CRI is reported in part 1. RI for reference CRI is included in part 1 if supported. QI for reference CRI is included in part 1. RI and CQI for other (non-reference) CRI are included in part 2. Type 1 PMI is included in part 2 if supported.
[0087] Case 3: This is similar to case 2. If PMI is supported for LTM CSI then PMI can be reported in part 1.
[0088] In this case, all CRI (associated with candidate cell ID) or reference CRI (if differential reporting) is included in part 1. RI for reference CRI is included in part 1 if supported, CQI for reference CRI in part 1, and Type 1 PMI in part 1 for reference CRI is included in part 1. RI and CQI for other CRI are in in part 2. Type 1 PMI for other CRI are included in part 2, if supported.
[0089] Case 4: If different numbers of TBs are supported, then the CQI are divided based on the legacy rule, e.g., CQI for the first TB in part 1, and other CQI for other TBs in part 2.
[0090] Additional Aspects of the Technology
[0091] In some embodiments, the number of CSI-RS resources in a CSI-RS resource set for mobility CSI reporting can be reported by UE as UE capability. For example, different UEs may have different CSI processing capability. The UE can report the supported maximum number of CSI-RS resources in one CSI-RS resource set or maximum number of CSI-RS resources supported for one candidate cell. In addition, the maximum number of CSI-RS resources or resource set or the maximum number of candidate cells can also be configured based on UE capability.
[0092] For the measurement of CSI-RS resources, a timeline or CPU counting can be determined. For example, the timeline can specify timing for receiving signaling, configuration of resources, and performance of measurements, for different cells. In addition, the number of CPUs for processing a CSI report can be determined. If one report is configured for one cell, a timeline or CPU count for the reported cell can be determined according to the CSI-RS resources in each report (e.g., the number of resources) .
[0093] If one report is configured for all candidate cells, and the candidate cells are configured with different numerologies, the timeline or CPU counting can be determined according to all the reported candidate cells. For example, , the timeline can be determined based on the smallest numerology for all the candidate cells.
[0094] Counting CPU occupation can be determined as follows: Let K be CSI-RS resources per candidate cell or per CSI-RS resource set. The CPU occupation O can then be where L is the number of CSI-RS resource sets. In some embodiments, the CPU occupation can be associated with the total number of configured CSI-RS resources in one report configuration. In some embodiments, the CPU occupation is associated with the reported number of CSI parameters, e.g., CQIs, for reporting for one cell or for a differential reporting.
[0095] In some embodiments, a restriction is predefined such that all the CSI-RS resources for CSI reporting are counted or transmitted only once.
[0096] In some embodiments, the CSI reporting includes reporting content relating to the candidate cells, such as RSRP, RI, CQI, PMI, and so on. The reporting contents can be the real value of the related parameters or a relative value compared to the CSI reporting of the serving cell, regardless of whether the serving cell is included or not in the CSI reporting for mobility.
[0097] In some embodiments, the serving cell is the cell from which the UE receives the first information (e.g., trigger state information) or the CSI reporting configuration. The candidate cells are cells when the UE performs cell switching. One of the candidate cells will be the one which UE will switch to, or the candidate cells are the cells that are associated with CSI-RS resources or CSI-RS resource sets that are different from the resources or resource sets of the serving cell. The target cell is the cell UE will switch to. If multiple candidate cells are configured, one of the multiple candidate cells is the target cell. If only one candidate cell is configured, the candidate cell is the target cell.
[0098] In some embodiments, the candidate cells are the cells associated with at least one CSI-RS resource or resource sets used for CSI reporting for mobility. The candidate cells can refer to all the cells, including serving cell, or only the cells other than the serving cell.
[0099] In some embodiments, a candidate cell can be an area which is covered by a cell or a communication node.
[0100] In some embodiments, a candidate cell can be from a cell group including multiple cells or communication nodes.
[0101] In some embodiments, the configured CSI-RS resources or resources sets associated with the candidate cells are from a CSI-RS resource group or a CSI-RS resource set group.
[0102] FIG. 3 is a flow diagram illustrating an example process 300 for wireless communication, in accordance with embodiments of the present disclosure. For example, the process 400 can be performed by a wireless device (e.g., wireless device 111-113 of FIG. 1 or UE 202 of FIG. 2) .
[0103] At step 310, a wireless device receives a first information from a network node (e.g., BS 120 of FIG. 1 or network nodes within the cells 204-210 of FIG. 2) . In some embodiments, the first information is configured to trigger a CSI report. The CSI report can be associated with a candidate cell (e.g., a candidate cell for the wireless device to switch to) . The candidate cell can be associated with a CSI-RS resource or resource set.
[0104] In some embodiments, the first information is indicated by RRC, MAC CE, or DCI signaling.
[0105] At step 320, the wireless device performs a measurement in response to receiving the first information. In some embodiments, the measurement is performed using a CSI-RS resource associated with the candidate cell.
[0106] At step 330, the wireless device transmits a second information based on the measurement. In some embodiments, the second information includes a CSI report of the measurement performed at step 320, and is triggered by the first information received at step 330. In some embodiments, the second information is included in uplink control information, and the first information at step 310 is included in downlink control information that triggers the UCI.
[0107] The second information at step 330 can include at least one of: a CSI-RS resource indicator (CRI) , a rank indicator (RI) , a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a precoding generating factor (i1) , or a strongest transmission layer index (LI) .
[0108] FIG. 4 is a flow diagram illustrating an example process 400 for wireless communication, in accordance with embodiments of the present disclosure. For example, the process 400 can be performed by a network node (e.g., base station 120 of FIG. 1) .
[0109] At step 410 a network node transmits a first information to a wireless device (e.g., wireless device 111-113 or UE 202) . In some embodiments, the first information is configured to trigger a CSI report. The CSI report can be associated with a candidate cell (e.g., a candidate cell for the wireless device to switch to) . The candidate cell can be associated with a CSI-RS resource or resource set.
[0110] In some embodiments, the first information is indicated by RRC, MAC CE, or DCI signaling. At step 420, the network node receives a second information from the wireless device based on a measurement performed by the wireless device in response to the first information. In some embodiments, the measurement is performed using a CSI-RS resource associated with the candidate cell.
[0111] In some embodiments, the second information includes a CSI report of the measurement described for step 420, and is triggered by the first information transmitted at step 410. In some embodiments, the second information is included in uplink control information, and the first information at step 410 is included in downlink control information that triggers the UCI.
[0112] The second information at step 420 can include at least one of: a CSI-RS resource indicator (CRI) , a rank indicator (RI) , a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a precoding generating factor (i1) , or a strongest transmission layer index (LI) .
[0113] FIG. 5 is a block diagram representation of a portion of an apparatus based on some embodiments of the disclosed technology. An apparatus 505 such as a network device or a base station or a wireless device (or UE) , can include processor electronics 510 such as one or more microprocessors that implement one or more of the techniques presented in this document. The apparatus 505 can include transceiver electronics 515 to send and / or receive wireless signals over one or more communication interfaces such as antenna (s) 520. The apparatus 505 can include other communication interfaces for transmitting and receiving data. Apparatus 505 can include one or more memories (not explicitly shown) configured to store information such as data and / or instructions. In some implementations, the processor electronics 510 can include at least a portion of the transceiver electronics 515. In some embodiments, at least some of the disclosed techniques, modules, or functions are implemented using the apparatus 505.
[0114] It will be appreciated that the present document discloses techniques that can be embodied in wireless communication systems for CSI reporting in mobility scenarios.
[0115] Solution clauses
[0116] Some embodiments may preferably incorporate the following solutions as described herein.
[0117] For example, the clauses listed below may be used by wireless device implementations (e.g., UE 111-113 of FIG. 1 or UE 202 of FIG. 2) as described herein.
[0118] Clause 1. A method of wireless communication (e.g., process 300 of FIG. 3) comprising: receiving, by a wireless device from a network node, a first information; performing a measurement in response to receiving the first information; and transmitting, by the wireless device, a second information based on the measurement.
[0119] Clause 2. The method of clause 1, wherein the first information indicates at least one of: a channel state information reference signal (CSI-RS) resource; a CSI-RS resource set; a CSI report indication; a candidate cell information; a presence of serving cell information in the first or second information; a presence of information of one or more candidate cells in the first or second information; a trigger state, a carrier information; or a transmission node information.
[0120] Clause 3. The method of clause 1 or 2, wherein the first information is indicated by: Radio Resource Control (RRC) , MAC control element (MAC CE) , or downlink control information (DCI) signaling.
[0121] Clause 4. The method of clause 2 or 3, wherein the trigger state is configured to trigger at least one of: at least one CSI reporting; at least one CSI reporting for mobility; or a cell switching.
[0122] Clause 5. The method of any of clauses 1-4, wherein a carrier, a transmission node, at least one CSI-RS resource, or at least one CSI-RS resource set is associated with one candidate cell.
[0123] Clause 6. The method of any of clauses 1-5, wherein the first information comprises at least one downlink indication signaling, wherein the at least one downlink indication signaling indicates at least one trigger state, wherein the at least one trigger state is configured to trigger at least one CSI report, and wherein the at least one CSI report is associated with at least one candidate cell.
[0124] Clause 7. The method of clause 6, wherein: (1) the at least one downlink indication signaling includes multiple downlink indication signalings, where each of the multiple downlink indication signalings includes one trigger state, wherein the one trigger state triggers one CSI reporting, and wherein the one CSI reporting is associated with one candidate cell; (2) the at least one downlink indication signaling includes one downlink indication signaling, wherein the one downlink indication signaling includes multiple trigger states, wherein the one trigger state triggers one CSI reporting, and wherein the one CSI reporting is associated with one candidate cell; (3) the at least one downlink indication signaling includes one downlink indication signaling, wherein the one downlink indication signaling includes one trigger state, wherein the one trigger state triggers multiple CSI reportings, and wherein each of the multiple CSI reportings is associated with one candidate cell; (4) the at least one downlink indication signaling includes one downlink indication signaling, wherein the one downlink indication signaling include one trigger state, wherein the one trigger state triggers one CSI reporting, and wherein the one CSI reporting is associated with multiple candidate cells; or (5) the at least one downlink indication signaling includes one downlink indication signaling, wherein the one downlink indication signaling includes one trigger state, wherein the one trigger state triggers one CSI reporting, and wherein the one CSI reporting is associated with one candidate cell.
[0125] Clause 8. The method of claim any of clauses 2-7, wherein an association between the CSI-RS resource or the CSI-RS resource set and at least one candidate cell is based on at least one of: a cell index, a frequency parameter associated with the at least one candidate cell, a candidate index, or a physical cell index (PCI) .
[0126] Clause 9. The method of clause 8, wherein the frequency parameter includes at least one of: a PRB, a BWP, a subband, a frequency band, a carrier frequency, a PRG or a carrier for CSI-RS or SSB.
[0127] Clause 10. The method of any of clauses 1-9, wherein the second information is carried in at least one of: uplink control information (UCI) , wherein the first information is included in downlink control information (DCI) that triggers the UCI; an uplink transmission to the network node; an uplink transmission to a serving cell, a candidate cell, or a target cell.
[0128] Clause 11. The method of any of clauses 1-10, wherein the second information includes at least one of: a CSI-RS resource indicator (CRI) , a rank indicator (RI) , a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a precoding generating factor (i1) , or a strongest transmission layer index (LI) .
[0129] Clause 12. The method of clause 11, where the second information comprises at least one combination indicator of the CRI, the RI, the CQI, the PMI, the i1 or the LI, wherein the combination indicator indicates at least one of: the CRI, the RI and the CQI (cri-RI-CQI) ; the CRI, the RI, the PMI and the CQI (cri-RI-PMI-CQI) ; the CRI, the RI, the i1, and the CQI (cri-RI-i1-CQI) ; or the CRI, the RI, the LI, the PMI, and the CQI (cri-RI-LI-PMI-CQI) .
[0130] Clause 13. The method of clause 11 or 12, wherein the RI is reported as one of: (1) one RI for each reported candidate cell; or (2) one RI for all the reported candidate cells.
[0131] Clause 14. The method of any of clauses 11-13, wherein the CQI or the PMI is reported as wideband or a subband CQI or PMI.
[0132] Clause 15. The method of any of clauses 1-14, wherein the second information is a periodic CSI report, a semi-persistent CSI report, or an aperiodic CSI report.
[0133] Clause 16. The method of any of clauses 1-15, wherein at least one periodic, semi-persistent, or aperiodic CSI-RS resource or resource set for channel measurement is configured in the first information.
[0134] For example, the clauses listed below may be used by network device implementations (e.g., BS 120 of FIG. 1 or a network node within the cells 204-210 of FIG. 2) as described herein.
[0135] Clause 17. A method of wireless communication (e.g., process 400 of FIG. 4) comprising: transmitting, by a network node to a wireless device, a first information; and receiving, from the wireless device, a second information based on a measurement performed by the wireless device in response to the first information.
[0136] Clause 18. The method of clause 17, wherein the first information indicates at least one of: a channel state information reference signal (CSI-RS) resource; a CSI-RS resource set; a CSI report indication; a candidate cell information; a presence of serving cell information in the first or second information; a presence of information of one or more candidate cells in the first or second information; a trigger state, a carrier information; or a transmission node information.
[0137] Clause 19. The method of clause 17 or 18, wherein the first information is indicated by: Radio Resource Control (RRC) , MAC control element (MAC CE) , or downlink control information (DCI) signaling.
[0138] Clause 20. The method of clause 18 or 19, wherein the trigger state is configured to trigger at least one of: at least one CSI reporting; at least one CSI reporting for mobility; or a cell switching.
[0139] Clause 21. The method of any of clauses 17-20, wherein a carrier, a transmission node, at least one CSI-RS resource, or at least one CSI-RS resource set is associated with one candidate cell.
[0140] Clause 22. The method of any of clauses 17-21, wherein the first information comprises at least one downlink indication signaling, wherein the at least one downlink indication signaling indicates at least one trigger state, wherein the at least one trigger state is configured to trigger at least one CSI report, and wherein the at least one CSI report is associated with at least one candidate cell.
[0141] Clause 23. The method of clause 22, wherein: (1) the at least one downlink indication signaling includes multiple downlink indication signalings, where each of the multiple downlink indication signalings includes one trigger state, wherein the one trigger state triggers one CSI reporting, and wherein the one CSI reporting is associated with one candidate cell; (2) the at least one downlink indication signaling includes one downlink indication signaling, wherein the one downlink indication signaling includes multiple trigger states, wherein the one trigger state triggers one CSI reporting, and wherein the one CSI reporting is associated with one candidate cell; (3) the at least one downlink indication signaling includes one downlink indication signaling, wherein the one downlink indication signaling includes one trigger state, wherein the one trigger state triggers multiple CSI reportings, and wherein each of the multiple CSI reportings is associated with one candidate cell; (4) the at least one downlink indication signaling includes one downlink indication signaling, wherein the one downlink indication signaling include one trigger state, wherein the one trigger state triggers one CSI reporting, and wherein the one CSI reporting is associated with multiple candidate cells; or (5) the at least one downlink indication signaling includes one downlink indication signaling, wherein the one downlink indication signaling includes one trigger state, wherein the one trigger state triggers one CSI reporting, and wherein the one CSI reporting is associated with one candidate cell.
[0142] Clause 24. The method of claim any of clauses 18-23, wherein an association between the CSI-RS resource or the CSI-RS resource set and at least one candidate cell is based on at least one of: a cell index, a frequency parameter associated with the at least one candidate cell, a candidate index, or a physical cell index (PCI) .
[0143] Clause 25. The method of clause 24, wherein the frequency parameter includes at least one of: a PRB, a BWP, a subband, a frequency band, a carrier frequency, a PRG or a carrier for CSI-RS or SSB.
[0144] Clause 26. The method of any of clauses 17-25, wherein the second information is carried in at least one of: uplink control information (UCI) , wherein the first information is included in downlink control information (DCI) that triggers the UCI; an uplink transmission to the network node; an uplink transmission to a serving cell, a candidate cell, or a target cell.
[0145] Clause 27. The method of any of clauses 17-26, wherein the second information includes at least one of: a CSI-RS resource indicator (CRI) , a rank indicator (RI) , a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a precoding generating factor (i1) , or a strongest transmission layer index (LI) .
[0146] Clause 28. The method of clause 27, where the second information comprises at least one combination indicator of the CRI, the RI, the CQI, the PMI, the i1 or the LI, wherein the combination indicator indicates at least one of: the CRI, the RI and the CQI (cri-RI-CQI) ; the CRI, the RI, the PMI and the CQI (cri-RI-PMI-CQI) ; the CRI, the RI, the i1, and the CQI (cri-RI-i1-CQI) ; or the CRI, the RI, the LI, the PMI, and the CQI (cri-RI-LI-PMI-CQI) .
[0147] Clause 29. The method of clause 27 or 28, wherein the RI is reported as one of: (1) one RI for each reported candidate cell; or (2) one RI for all the reported candidate cells.
[0148] Clause 30. The method of any of clauses 27-29, wherein the CQI or the PMI is reported as wideband or a subband CQI or PMI.
[0149] Clause 31. The method of any of clauses 17-30, wherein the second information is a periodic CSI report, a semi-persistent CSI report, or an aperiodic CSI report.
[0150] Clause 32. The method of any of clauses 17-31, wherein at least one periodic, semi-persistent or aperiodic CSI-RS resource or resource set for channel measurement is configured in the first information.
[0151] For example, the clauses below may be implemented by a wireless communication apparatus (e.g., apparatus 505 of FIG. 5) or implemented in a computer readable medium.
[0152] Clause 33. An apparatus for wireless communication comprising at least one processor configured to execute code, when executed by the at least processor, causing the apparatus to implement the method of any of clauses 1 to 32.
[0153] Clause 34. A computer readable medium having code stored thereon, the code when executed by at least one processor of a computing system, causing the computing system to implement the method of any of clauses 1 to 32.
[0154] 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.
[0155] 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.
[0156] 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.
[0157] Unless the context clearly requires otherwise, throughout the description and the claims, the words “comprise, ” “comprising, ” and the like are to be construed in an inclusive sense, as opposed to an exclusive or exhaustive sense, i.e., in the sense of “including, but not limited to. ” As used herein, the terms "connected, " "coupled, " or any variant thereof means any connection or coupling, either direct or indirect, between two or more elements; the coupling or connection between the elements can be physical, logical, or a combination thereof. Additionally, the words “herein, ” “above, ” "below, " and words of similar import, when used in this application, refer to this application as a whole and not to any particular portions of this application. Where the context permits, words using the singular or plural number may also include the plural or singular number respectively. The word "or" in reference to a list of two or more items, covers all of the following interpretations of the word: any one of the items in the list, all of the items in the list, and any combination of the items in the list. Likewise, the term “and / or” in reference to a list of two or more items, covers all of the following interpretations of the word: any one of the items in the list, all of the items in the list, and any combination of the items in the list.
[0158] Conjunctive language such as the phrase “at least one of X, Y, and Z, ” unless specifically stated otherwise, is understood with the context as used in general to convey that an item, term, etc. may be either X, Y, or Z or any combination thereof. Thus, such conjunctive language is not generally intended to imply that certain embodiments require at least one of X, at least one of Y, and at least one of Z to each be present. Further, the use of the phrase “at least one of X, Y or Z” as used in general is to convey that an item, term, etc. may be either X, Y, or Z, or any combination thereof.
[0159] From the foregoing, it will be appreciated that specific embodiments of the invention have been described herein for purposes of illustration, but that various modifications may be made without deviating from the scope of the invention. Accordingly, the invention is not limited except as by the appended claims.
Claims
1.A method of wireless communication comprising:receiving, by a wireless device from a network node, a first information;performing a measurement in response to receiving the first information; andtransmitting, by the wireless device, a second information based on the measurement.2.The method of claim 1, wherein the first information indicates at least one of:a channel state information reference signal (CSI-RS) resource;a CSI-RS resource set;a CSI report indication;a candidate cell information;a presence of serving cell information in the first or second information;a presence of information of one or more candidate cells in the first or second information;a trigger state,a carrier information; ora transmission node information.3.The method of claim 1 or 2, wherein the first information is indicated by: Radio Resource Control (RRC) , MAC control element (MAC CE) , or downlink control information (DCI) signaling.4.The method of claim 2 or 3, wherein the trigger state is configured to trigger at least one of:at least one CSI reporting;at least one CSI reporting for mobility; ora cell switching.5.The method of any of claims 1-4, wherein a carrier, a transmission node, at least one CSI-RS resource, or at least one CSI-RS resource set is associated with one candidate cell.6.The method of any of claims 1-5, wherein the first information comprises at least one downlink indication signaling, wherein the at least one downlink indication signaling indicates at least one trigger state, wherein the at least one trigger state is configured to trigger at least one CSI report, and wherein the at least one CSI report is associated with at least one candidate cell.7.The method of claim 6, wherein:(1) the at least one downlink indication signaling includes multiple downlink indication signalings, where each of the multiple downlink indication signalings includes one trigger state, wherein the one trigger state triggers one CSI reporting, and wherein the one CSI reporting is associated with one candidate cell;(2) the at least one downlink indication signaling includes one downlink indication signaling, wherein the one downlink indication signaling includes multiple trigger states, wherein the one trigger state triggers one CSI reporting, and wherein the one CSI reporting is associated with one candidate cell;(3) the at least one downlink indication signaling includes one downlink indication signaling, wherein the one downlink indication signaling includes one trigger state, wherein the one trigger state triggers multiple CSI reportings, and wherein each of the multiple CSI reportings is associated with one candidate cell;(4) the at least one downlink indication signaling includes one downlink indication signaling, wherein the one downlink indication signaling include one trigger state, wherein the one trigger state triggers one CSI reporting, and wherein the one CSI reporting is associated with multiple candidate cells; or(5) the at least one downlink indication signaling includes one downlink indication signaling, wherein the one downlink indication signaling includes one trigger state, wherein the one trigger state triggers one CSI reporting, and wherein the one CSI reporting is associated with one candidate cell.8.The method of claim any of claims 2-7, wherein an association between the CSI-RS resource or the CSI-RS resource set and at least one candidate cell is based on at least one of: a cell index, a frequency parameter associated with the at least one candidate cell, a candidate index, or a physical cell index (PCI) .9.The method of claim 8, wherein the frequency parameter includes at least one of: a PRB, a BWP, a subband, a frequency band, a carrier frequency, a PRG or a carrier for CSI-RS or SSB.10.The method of any of claims 1-9, wherein the second information is carried in at least one of:uplink control information (UCI) , wherein the first information is included in downlink control information (DCI) that triggers the UCI;an uplink transmission to the network node; oran uplink transmission to a serving cell, a candidate cell, or a target cell.11.The method of any of claims 1-10, wherein the second information includes at least one of: a CSI-RS resource indicator (CRI) , a rank indicator (RI) , a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a precoding generating factor (i1) , or a strongest transmission layer index (LI) .12.The method of claim 11, where the second information comprises at least one combination indicator of the CRI, the RI, the CQI, the PMI, the i1 or the LI, wherein the combination indicator indicates at least one of:the CRI, the RI and the CQI (cri-RI-CQI) ;the CRI, the RI, the PMI and the CQI (cri-RI-PMI-CQI) ;the CRI, the RI, the i1, and the CQI (cri-RI-i1-CQI) ; orthe CRI, the RI, the LI, the PMI, and the CQI (cri-RI-LI-PMI-CQI) .13.The method of claim 11, wherein the RI is reported as one of: (1) one RI for each reported candidate cell; or (2) one RI for all the reported candidate cells.14.The method of claim 11, wherein the CQI or the PMI is reported as wideband or a subband CQI or PMI.15.The method of any of claims 1-14, wherein the second information is a periodic CSI report, a semi-persistent CSI report, or an aperiodic CSI report.16.The method of any of claims 1-15, wherein at least one periodic, semi-persistent or aperiodic CSI-RS resource or resource set for channel measurement are configured in the first information.17.A method of wireless communication comprising:transmitting, by a network node to a wireless device, a first information; andreceiving, from the wireless device, a second information based on a measurement performed by the wireless device in response to the first information.18.The method of claim 17, wherein the first information indicates at least one of:a channel state information reference signal (CSI-RS) resource;a CSI-RS resource set;a CSI report indication;a candidate cell information;a presence of serving cell information in the first or second information;a presence of information of one or more candidate cells in the first or second information;a trigger state,a carrier information; ora transmission node information.19.The method of claim 17 or 18, wherein the first information is indicated by: Radio Resource Control (RRC) , MAC control element (MAC CE) , or downlink control information (DCI) signaling.20.The method of claim 18 or 19, wherein the trigger state is configured to trigger at least one of:at least one CSI reporting;at least one CSI reporting for mobility; ora cell switching.21.The method of any of claims 17-20, wherein a carrier, a transmission node, at least one CSI-RS resource, or at least one CSI-RS resource set is associated with one candidate cell.22.The method of any of claims 17-21, wherein the first information comprises at least one downlink indication signaling, wherein the at least one downlink indication signaling indicates at least one trigger state, wherein the at least one trigger state is configured to trigger at least one CSI report, and wherein the at least one CSI report is associated with at least one candidate cell.23.The method of claim 22, wherein:(1) the at least one downlink indication signaling includes multiple downlink indication signalings, where each of the multiple downlink indication signalings includes one trigger state, wherein the one trigger state triggers one CSI reporting, and wherein the one CSI reporting is associated with one candidate cell;(2) the at least one downlink indication signaling includes one downlink indication signaling, wherein the one downlink indication signaling includes multiple trigger states, wherein the one trigger state triggers one CSI reporting, and wherein the one CSI reporting is associated with one candidate cell;(3) the at least one downlink indication signaling includes one downlink indication signaling, wherein the one downlink indication signaling includes one trigger state, wherein the one trigger state triggers multiple CSI reportings, and wherein each of the multiple CSI reportings is associated with one candidate cell;(4) the at least one downlink indication signaling includes one downlink indication signaling, wherein the one downlink indication signaling include one trigger state, wherein the one trigger state triggers one CSI reporting, and wherein the one CSI reporting is associated with multiple candidate cells; or(5) the at least one downlink indication signaling includes one downlink indication signaling, wherein the one downlink indication signaling includes one trigger state, wherein the one trigger state triggers one CSI reporting, and wherein the one CSI reporting is associated with one candidate cell.24.The method of claim any of claims 18-23, wherein an association between the CSI-RS resource or the CSI-RS resource set and at least one candidate cell is based on at least one of: a cell index, a frequency parameter associated with the at least one candidate cell, a candidate index, or a physical cell index (PCI) .25.The method of claim 24, wherein the frequency parameter includes at least one of: a PRB, a BWP, a subband, a frequency band, a carrier frequency, a PRG or a carrier for CSI-RS or SSB.26.The method of any of claims 17-25, wherein the second information is carried in at least one of:uplink control information (UCI) , wherein the first information is included in downlink control information (DCI) that triggers the UCI;an uplink transmission to the network node; oran uplink transmission to a serving cell, a candidate cell, or a target cell.27.The method of any of claims 17-26, wherein the second information includes at least one of: a CSI-RS resource indicator (CRI) , a rank indicator (RI) , a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a precoding generating factor (i1) , or a strongest transmission layer index (LI) .28.The method of claim 27, where the second information comprises at least one combination indicator of the CRI, the RI, the CQI, the PMI, the i1 or the LI, wherein the combination indicator indicates at least one of:the CRI, the RI and the CQI (cri-RI-CQI) ;the CRI, the RI, the PMI and the CQI (cri-RI-PMI-CQI) ;the CRI, the RI, the i1, and the CQI (cri-RI-i1-CQI) ; orthe CRI, the RI, the LI, the PMI, and the CQI (cri-RI-LI-PMI-CQI) .29.The method of claim 27, wherein the RI is reported as one of: (1) one RI for each reported candidate cell; or (2) one RI for all the reported candidate cells.30.The method of claim 27, wherein the CQI or the PMI is reported as wideband or a subband CQI or PMI.31.The method of any of claims 17-30, wherein the second information is a periodic CSI report, a semi-persistent CSI report, or an aperiodic CSI report.32.The method of any of claims 17-31, wherein at least one periodic, semi-persistent or aperiodic CSI-RS resource or resource set for channel measurement is configured in the first information.33.An apparatus for wireless communication comprising at least one processor configured to execute code, when executed by the at least one processor, causing the apparatus to implement the method of any of claims 1 to 32.34.A computer readable medium having code stored thereon, the code when executed by at least one processor of a computing system, causing the computing system to implement the method of any of claims 1 to 32.
Citation Information
Patent Citations
Method and device for sending and receiving measurement report
CN110958632A
Uplink control information (UCI) for channel state information (CSI) based on non-precoding matrix indicator (PMI)
CN118120155A
Methods and arrangements for measurement based mobility
EP3520473A1
Relaxed Measurement Reporting with Control Plane Dual Connectivity
US20170150384A1