Channel state information reporting techniques

Abstract

Techniques and methods for channel state information reporting are described. In one aspect, a method of wireless communication includes determining, by a wireless communication device, at least N time domain transmission opportunities of a measurement element of at least one of a channel state information reference signal (CSI-RS) or a channel state interference measurement (CSI-IM), where N is an integer greater than 1; determining, by the wireless communication device, first channel state information (CSI) of one CSI report based on at least N time domain transmission occasions of at least one of CSI-RS or CSI-IM; and transmitting, by the wireless communication device, the first channel state information.

Description

Technical Field

[0001] The present disclosure relates generally to digital wireless communications. Background Art

[0002] Mobile communication technology is pushing the world towards an increasingly connected and networked society. Compared with existing wireless networks, the next generation of systems and wireless communication technologies will need to support a wider range of use case features and provide more complex and sophisticated access requirements and flexibility.

[0003] Long Term Evolution (LTE) is a wireless communication standard for mobile devices and data terminals developed by the Third Generation Partnership Project (3GPP). LTE-Advanced (LTE-A) is a wireless communication standard that enhances the LTE standard. The fifth-generation wireless system, known as 5G, advances the LTE and LTE-A wireless standards and is committed to supporting higher data rates, a large number of connections, ultra-low latency, high reliability, and other emerging business requirements. Summary of the invention

[0004] A wireless communication method, comprising: determining, by a wireless communication device, at least N time domain transmission opportunities of a measurement element of at least one of a channel state information reference signal (CSI-RS) or a channel state interference measurement (CSI-IM), wherein N is an integer greater than 1; determining, by the wireless communication device, first channel state information CSI of a CSI report based on the at least N time domain transmission opportunities of at least one of the CSI-RS or the CSI-IM; and sending the first channel state information by the wireless communication device.

[0005] A wireless communication method, in which a wireless communication node receives first channel state information from a wireless communication device, wherein the first channel state information is determined by: the wireless communication device determines at least N time domain transmission opportunities of a channel state information reference signal (CSI-RS) or a channel state interference measurement (CSI-IM), wherein N is an integer greater than 1; and the wireless communication device determines first channel state information CSI of a CSI report based on at least N time domain transmission opportunities of the CSI-RS or CSI-IM.

[0006] In some embodiments, the at least N time domain transmission opportunities correspond to at least one or more CSI-RS resources, or one or more CSI-IM resources.

[0007] In some embodiments, the above method also includes at least one of the following: when the condition is met, discarding and / or stopping the wireless communication device from sending a CSI report; when the condition is met, discarding and / or stopping the wireless communication node from receiving a CSI report; if the condition is met, stopping the wireless communication device from sending the first CSI; if the condition is met, stopping the wireless communication node from receiving the first CSI; when the condition is met, the wireless communication device determines and sends the second CSI; or when the condition is met, the wireless communication node receives the second CSI.

[0008] In some embodiments, the CSI report includes at least one of the following: a first CSI corresponding to a second type of reference time unit; a second CSI corresponding to a first type of reference time unit; or a first CSI and a second CSI corresponding to different sets of reference time units.

[0009] In some embodiments, the second type of reference time unit includes one or more time units that do not precede a time unit in which the first communications device transmits the first CSI or the second CSI.

[0010] In some embodiments, the first type of reference time unit includes one or more time units prior to a time unit in which the first communications device transmits the first CSI or the second CSI.

[0011] In some embodiments, the method further includes at least one of the following: the second type of reference time unit includes one or more time units, and the first type of reference time unit includes one time unit; the first type of reference time unit includes a subset of the second type of reference time unit.

[0012] In some embodiments, the condition includes at least one of the following: D time domain transmission opportunities of CSI-RS or CSI-IM are received by the wireless communication device no later than the reference time unit after the event; D time domain transmission opportunities of CSI-RS or CSI-IM are received by the wireless communication device no later than the reference time unit within the (discontinuous reception) DRX active time; D time domain transmission opportunities of CSI-RS or CSI-IM are received by the wireless communication device no later than the reference time unit within the active duration of the configuration parameters, and D time domain transmission opportunities of CSI-RS or CSI-IM are sent by the wireless communication node no later than the reference time unit after the event; D time domain transmission opportunities of CSI-RS or CSI-IM are sent by the wireless communication node no later than the reference time unit within the (discontinuous reception) DRX active time; or D time domain transmission opportunities of CSI-RS or CSI-IM are sent by the wireless communication node no later than the reference time unit within the active duration of the configuration parameters, wherein D is less than N and greater than or equal to 1.

[0013] In some embodiments, the condition includes at least one of the following: the wireless device does not receive a time domain transmission opportunity for CSI-RS or CSI-IM no later than a reference time unit after an event; the wireless device does not receive a time domain transmission opportunity for CSI-RS or CSI-IM no later than a reference time unit during a (discontinuous reception) DRX active time; the wireless device does not receive a time domain transmission opportunity for CSI-RS or CSI-IM no later than a reference time unit during an active duration of configured parameters; the wireless node does not send a time domain transmission opportunity for CSI-RS or CSI-IM no later than a reference time unit after an event; the wireless node does not send a time domain transmission opportunity for CSI-RS or CSI-IM no later than a reference time unit during a (discontinuous reception) DRX active time; or the wireless node does not have a time domain transmission opportunity for CSI-RS or CSI-IM no later than a reference time unit during an active duration of configured parameters.

[0014] In some embodiments, the event is at least one of: 1) CSI reporting configuration, 2) CSI reporting reconfiguration, 3) serving cell activation, 4) BWP change, or 5) activation of SP-CSI.

[0015] In some embodiments, at least N time domain transmission opportunities of the CSI-RS are used for channel measurement or for interference measurement.

[0016] In some embodiments, the condition includes at least one of the following: the wireless communication device only receives D time domain transmission opportunities of CSI-RS or CSI-IM no later than the reference time unit after the event; the wireless communication device only receives D time domain transmission opportunities of CSI-RS or CSI-IM no later than the reference time unit within the (discontinuous reception) DRX active time; the wireless communication device only receives D time domain transmission opportunities of CSI-RS or CSI-IM no later than the reference time unit within the active duration of the configuration parameters, the wireless communication node only sends D time domain transmission opportunities of CSI-RS or CSI-IM no later than the reference time unit after the event; the wireless communication node only sends D time domain transmission opportunities of CSI-RS or CSI-IM no later than the reference time unit within the (discontinuous reception) DRX active time; or the wireless communication node only sends D time domain transmission opportunities of CSI-RS or CSI-IM no later than the reference time unit within the active duration of the configuration parameters, where D is less than N and greater than or equal to 1.

[0017] In some embodiments, the condition includes at least one of the following: receiving D time domain transmission opportunities of CSI-RS for channel measurement by the wireless communication device no later than the reference time unit after the event; receiving E time domain opportunities of CSI-RS and / or CSI-IM for interference measurement by the wireless communication device no later than the reference time unit after the event; receiving D time domain transmission opportunities of CSI-RS for channel measurement by the wireless communication device no later than the reference time unit within the (discontinuous reception) DRX active time; receiving E time domain opportunities of CSI-RS and / or CSI-IM for interference measurement by the wireless communication device no later than the reference time unit within the DRX active time; receiving D time domain transmission opportunities of CSI-RS for channel measurement by the wireless communication device no later than the reference time unit within the active duration of the configuration parameters; receiving E time domain opportunities of CSI-RS and / or CSI-IM for interference measurement by the wireless communication device no later than the reference time unit within the active duration of the configuration parameters; wherein D is less than N, E is less than L, and L is an integer greater than 0.

[0018] In some embodiments, the above method also includes: the wireless communication device determines at least N time domain transmissions for channel measurement and at least L time domain opportunities of CSI-RS or CSI-IM for interference measurement; the wireless communication device determines the first CSI based on at least N time domain transmissions for channel measurement and at least L time domain opportunities of CSI-RS or CSI-IM for interference measurement; the wireless communication device sends the first CSI, where L is greater than or equal to 1, and / or L is N or less than N.

[0019] In some embodiments, the event is at least one of: 1) CSI report configuration, 2) CSI report reconfiguration, 3) serving cell activation, 4) BWP change, or 5) activation of SP-CSI.

[0020] In some embodiments, the first CSI is determined based on the state of the time restriction for channel measurement, and the method further includes at least one of the following: when the state of the time restriction is "unconfigured", the first CSI is determined based on at least N time domain transmission opportunities of the CSI-RS for channel measurement that are no later than the reference time unit; when the state of the time restriction is "configured", the CSI is determined based on only the most recent N time domain transmission opportunities of the CSI-RS for channel measurement that are no later than the reference time unit.

[0021] In some embodiments, the at least N transmission opportunities include at least two of the following transmission opportunities: 1) periodic transmission opportunities, 2) semi-persistent transmission opportunities, and / or 3) non-periodic transmission opportunities.

[0022] In some embodiments, a report is associated with more than one type of CSI-RS resources used for channel measurement, wherein the type of CSI-RS resources comprises at least one of the following resource types: 1) periodic, 2) semi-persistent, and / or 3) non-periodic.

[0023] In some embodiments, the first CSI includes CSI corresponding to F reference time units, where F is an integer greater than 1 or equal to.

[0024] In some embodiments, the method further comprises at least one of: the status of the time limit for channel measurement and / or interference measurement depends on F; or the status of the time limit for channel measurement and / or interference measurement depends on the types of F reference time units.

[0025] In some embodiments, the state of the time limit satisfies at least one of the following: when F reference time units include time units of the second type or when F is greater than 1, the time limit for channel measurement and / or interference measurement is not configured; or when F is less than 2 or when F reference time units include time units of the first type, the time limit for channel measurement and / or interference measurement is configured or not configured.

[0026] In some embodiments, the F reference time units satisfy at least one of the following: the first time unit among the F reference time units is a reporting time slot including the first CSI; the gap between the first time unit among the F reference time units and the reporting time slot including the first CSI is determined by received signaling; the gap between the first time unit among the F reference time units and the reporting time slot including the first CSI is determined by parameters of the CSI-RS or CSI-IM; the F reference time units are not before the reporting time slot including the first CSI; the F reference time units include a time unit after the reporting time slot including the first CSI.

[0027] In some embodiments, F is determined by at least the value of: N; a capability report reported by the wireless communication device; or received signaling from a wireless communication node.

[0028] In some embodiments, the F reference time units are consecutive or non-consecutive.

[0029] In some embodiments, the condition includes at least one of the following: none of the F reference time units is an available downlink time unit; or at least one of the F reference time units is not an available downlink time unit.

[0030] In some embodiments, the first CSI includes a PMI and a CQI, wherein the first CSI satisfies at least one of the following: the first CSI includes a PMI for each time unit in a first set of time units; the first CSI includes a CQI for each time unit in a second set of time units; the first CSI includes a PMI and a CQI, each PMI and CQI corresponding to a different type of time unit in F reference time units, wherein the first set of time units and the second set of time units include time units in F reference time units.

[0031] In some embodiments, N satisfies at least one of the following: N is greater than or equal to 5; N is one of 5, 10, 15 or 20; N is included in a capability report reported by the wireless communication device to the wireless communication node; or N is determined by received signaling.

[0032] In some embodiments, L satisfies at least one of the following: L is greater than or equal to 5; L is one of 5, 10, 15 or 20; L is included in a capability report reported by the wireless communication device to the wireless communication node; or L is determined by received signaling.

[0033] In some embodiments, the at least N time domain transmission opportunities are no later than the reference time unit.

[0034] In some embodiments, the at least L time domain opportunities for interference measurement are no later than the reference time unit.

[0035] In some embodiments, the first CSI is determined based on the state of the time limit for interference measurement, and the method also includes at least one of the following: when the state of the time limit for interference measurement is "unconfigured", the first CSI is determined based on at least L time domain opportunities of the CSI-RS and / or CSI-IM used for interference measurement; when the state of the time limit for interference measurement is "configured", the CSI is determined only based on the most recent L time domain opportunities of the CSI-RS and / or CSI-IM used for interference measurement that are no later than the reference time unit.

[0036] In some embodiments, the first CSI is based on an assumption of a parameter, wherein the F reference time units have the same or different assumptions of the parameter, and / or the determined CSI includes at least one of a PMI, a CQI, or a time domain channel characteristic.

[0037] A wireless communication method includes: determining, by a wireless communication device, X reference time units for a channel state information (CSI) report, where X is an integer greater than or equal to 1; determining, by the wireless communication device, first channel state information (CSI) corresponding to one or more time units of the X reference time units; and reporting, by the wireless communication device, the first CSI to a wireless communication node.

[0038] A wireless communication method includes: receiving, by a wireless communication node, first channel state information (CSI) from a wireless communication device, wherein the CSI is determined by: determining, by the wireless communication device, X reference time units for a CSI report, where X is an integer greater than or equal to 1; and determining, by the wireless communication device, first CSI corresponding to one or more time units of the X reference time units.

[0039] In some embodiments, the X reference time units include more than one type of time units.

[0040] In some embodiments, the X reference time units include a first type of time unit and a second type of time unit, wherein at least one of the following items reported in one report: a time domain transmission timing for channel measurement and a time domain timing for interference measurement are no later than the first type of time unit, wherein the second type of time unit includes one or more time units of the X reference time units corresponding to the first CSI.

[0041] In some embodiments, when X is greater than 1 and / or when the X reference time units include a time unit after a reporting time slot including the first CSI, time restrictions for channel measurement or for interference measurement are not configured.

[0042] In some embodiments, the X reference time units satisfy at least one of the following: a first time unit among the X reference time units is a reporting time slot including a first CSI; a gap between the first time unit among the X reference time units and the reporting time slot including the first CSI is determined by received signaling; a gap between the first time unit among the X reference time units and the reporting time slot including the first CSI is determined by a parameter of a CSI-RS or a CSI-IM; the X reference time units are not before a reporting time slot including the CSI; wherein X is included in a capability report of the wireless communication device.

[0043] In some embodiments, the X time units are consecutive or non-consecutive.

[0044] In some embodiments, the first CSI satisfies at least one of the following: the first CSI includes a PMI for each time unit in a first set of time units; the first CSI includes a CQI for each time unit in a second set of time units; wherein the first set of time units and the second set of time units include time units among X time units.

[0045] In some embodiments, the above method includes at least one of the following: if the condition is met, the wireless communication device discards the first CSI; or if the condition is met, the wireless communication node stops receiving the first CSI; if the condition is met, the wireless communication node determines and reports the second CSI; or if the condition is met, the wireless communication node receives the second CSI.

[0046] In some embodiments, the condition includes: determining, by the wireless communication node or the wireless communication device, that no valid time domain resources are available for the reference time units of the first type included in the X reference time units.

[0047] In some embodiments, the condition includes: determining, by the wireless communication node or the wireless communication device, that all of the second type of reference time units among the X reference time units are not valid downlink time units; or determining, by the wireless communication node or the wireless communication device, that at least one of the second type of reference time units among the X reference time units is not a valid downlink time unit.

[0048] In some embodiments, when 1) the wireless communication device identifies less than N transmission opportunities for channel measurement and / or less than L transmission opportunities for interference measurement no later than the first type of reference unit, or 2) X is 1, the first CSI includes CSI corresponding only to the first type of reference time unit.

[0049] In some embodiments, when 1) the wireless communication device identifies at least N transmission opportunities for channel measurement and / or at least L transmission opportunities for interference measurement that are no later than a first type of reference time unit, the first CSI includes CSI for each reference time unit in the first type of reference time unit and the second type of reference time unit.

[0050] In some embodiments, when 1) the wireless communication device identifies less than N transmission opportunities for channel measurement and less than L transmission opportunities for interference measurement no later than the first type of reference time unit, the CSI report does not include a precoding matrix and / or CQI for a second type of reference time unit included in the X reference time units.

[0051] In some embodiments, the first CSI comprises a time unit index corresponding to a maximum CQI value among a plurality of CQI values, each CQI value among the plurality of CQI values ​​corresponding to one time unit among the X time units.

[0052] In some embodiments, the method further includes determining, by the wireless communication device, the gap based on at least one of: 1) X; 2) whether the CSI includes CSI corresponding to a second type of reference time unit; or 3) parameters of X reference time units.

[0053] In some embodiments, the gap includes at least one of: a gap between a first type of reference time unit and a time slot in which the wireless communication device reports a CSI report; a gap between a DCI that triggers a first CSI and a time slot in which the wireless communication device reports the first CSI; a gap between the last OFDM symbol of a reported measurement reference signal or measurement resource and a time slot in which the wireless communication device reports the first CSI.

[0054] In some embodiments, X is determined by at least one of: X is included in a capability report reported by the wireless communication device to the wireless communication node; X is determined by received signaling; X is included in a CSI report; or X is determined by a parameter of a reported measurement reference signal.

[0055] In some embodiments, the first CSI includes at least one of a PMI, a CQI, or a time domain channel characteristic.

[0056] In yet another exemplary embodiment, a device configured or operable to perform the above method is disclosed.

[0057] The above and other aspects and implementations thereof are described in more detail in the drawings, the description and the claims.

[0058] Through the above method and system, the UE can predict the CSI for some reference time units and track the rapidly changing channels well. The overhead of reporting CSI is reduced. A method is provided for reporting CSI when the UE receives less than N / L or zero time domain opportunities no later than the first reference time unit. In this case, the UE and the gNB can know the CSI well without additional signaling. In this case, the gNB can know at least the second CSI, so in this case, the gNB can schedule the UE well. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 An example diagram is provided for using N transmission opportunities to predict CSI on k subsequent units.

[0060] Figure 2 An example diagram is provided for predicting CSI on k subsequent units using N transmission opportunities no later than one reference time unit.

[0061] Figure 3 Example diagrams of these two types of reference time units are provided.

[0062] Figure 4 An example diagram is provided in which a CSI report corresponds to more than one type of channel state measurement resources, such as periodic and aperiodic.

[0063] Figure 5 An example diagram of a gap between a PUSCH including reported aperiodic CSI and a PDCCH triggering aperiodic CSI and a reference time unit is provided.

[0064] Figure 6 Another example diagram of a gap between a PUSCH including reported aperiodic CSI and a PDCCH triggering the aperiodic CSI and a reference time unit is provided.

[0065] Figure 7 An exemplary block diagram of a hardware platform that may be part of a network device or a communication device is shown.

[0066] Figure 8 An example of wireless communication including a base station (BS) and a user equipment (UE) based on some implementations of the disclosed technology is shown.

[0067] Figure 9-12 Several examples of processes for wireless communications based on some example embodiments of the disclosed technology are shown. DETAILED DESCRIPTION

[0068] Example 1

[0069] The UE determines N time-domain channel state information reference signal (CSI-RS) transmission opportunities, and determines a channel state indicator (CSI) of a CSI report based on the N time-domain CSI-RS transmission opportunities.

[0070] N is greater than 1.

[0071] The N time-domain CSI-RS transmission opportunities may correspond to one or more CSI-RS resources.

[0072] For example, N time-domain CSI-RS transmission opportunities correspond to N time-domain transmission opportunities of a periodic CSI-RS resource / semi-persistent CSI-RS resource. In other words, N time-domain CSI-RS transmission opportunities correspond to N time-domain transmission periods of a periodic CSI-RS resource / semi-persistent CSI-RS resource.

[0073] Alternatively, N time-domain CSI-RS transmission opportunities correspond to M CSI-RS resources. M is equal to or less than N. If N is equal to M, each of the N time-domain CSI-RS transmission opportunities corresponds to one CSI-RS resource.

[0074] In some implementations, the N CSI-RS resources are aperiodic CSI-RS.

[0075] like Figure 1 As shown, the UE determines N time-domain CSI-RS transmission opportunities, and predicts channel state information (CSI) on k subsequent time units based on the N time-domain CSI-RS transmission opportunities.

[0076] In some implementations, the UE reports its N capability, and N is determined by the value reported by the UE, because N depends on the UE's prediction algorithm.

[0077] In some implementations, N is a fixed value agreed upon by the UE and the gNB.

[0078] In some implementations, N is configured by the gNB using signaling.

[0079] The k time units can be continuous or non-continuous.

[0080] In some implementations, N is equal to or greater than 5. For example, N can be one of 5, 8, 10, 20, 30, or 87.

[0081] In some implementations, N is equal to or greater than 10. For example, N can be one of 10, 15, 20, 25, 30, or 87.

[0082] In some implementations, the N time-domain CSI-RS transmission opportunities are no later than one reference time unit, such as Figure 2As shown. The reference time unit may be a time slot. In some implementations, a reference unit may be named a CSI reference resource. Figure 3 As shown, the time interval between PUCCH / PUSCH including CSI reporting is n ref Sure.

[0083] In some implementations, the UE determines at least N time-domain CSI-RS transmission opportunities, and determines the CSI of a CSI report based on the at least N time-domain CSI-RS transmission opportunities.

[0084] If the UE cannot determine / find at least N time-domain CSI-RS transmission opportunities, the UE shall discard the CSI report and not report CSI.

[0085] In some implementations, after the event occurs (or within the duration), the UE reports CSI only after receiving at least N time-domain CSI-RS transmission opportunities no later than the reference time unit, otherwise the UE discards the CSI.

[0086] For example, the event includes at least one of the following: CSI report (re)configuration, serving cell activation, BWP change, or activation of semi-persistent CSI (SP-CSI).

[0087] If N time-domain CSI-RS transmission opportunities correspond to N CSI-RS resources, it means that the UE reports CSI only after receiving at least one time-domain CSI-RS transmission opportunity for each of the N CSI resources no later than the reference time unit, otherwise the UE discards the CSI.

[0088] In some implementations, when discontinuous reception (DRX) is configured, the UE reports a CSI report only when it receives at least N time-domain CSI-RS transmission opportunities that are no later than the reference time unit within the DRX active time, otherwise it discards the report.

[0089] If N time-domain CSI-RS transmission opportunities correspond to N CSI-RS resources, it means that the UE reports the CSI report only when it receives at least one time-domain CSI-RS transmission opportunity for each of the N CSI-RS resources that is not later than the reference time unit during the DRX active time, otherwise the report is discarded.

[0090] In some implementations, the CSI of one CSI report is reported in one reporting instance (and / or in one PUSCH / PUCCH). Alternatively, the CSI of one CSI report is reported in more than one reporting instance.

[0091] In some implementations, N time-domain CSI-RS transmission opportunities are used for channel measurement.

[0092] In some implementations, N time-domain CSI-RS transmission opportunities are used for interference measurement.

[0093] In some implementations, N time-domain CSI-RS transmission opportunities are used for channel measurement and for interference measurement.

[0094] For example, the UE determines N time-domain CSI-RS transmission opportunities for channel measurement and L time-domain CSI-RS transmission opportunities for interference measurement, and the UE determines a channel state indicator (CSI) of a CSI report based on the N time-domain CSI-RS transmission opportunities for channel measurement and the L time-domain CCSI-RS transmission opportunities for interference measurement. L may be equal to or less than N. In some implementations, L is greater than 1 or equal to 1. In some implementations, L may be greater than N.

[0095] In some implementations, in order to calculate the precoding matrix indication (PMI), N time domain CSI-RS transmission opportunities for channel measurement are required, and in order to calculate the (channel quality indicator) CQI, N time domain CSI-RS transmission opportunities for channel measurement and L time domain CSI-RS transmission opportunities for interference measurement are required. Calculating PMI and channel CQI depends on different time domain opportunities.

[0096] In some implementations, in order to calculate PMI and CQI, N time-domain CSI-RS transmission opportunities for channel measurement and L time-domain CSI-RS transmission opportunities for interference measurement are required.

[0097] In some implementations, if the high-layer parameter timeRestrictionForInterferenceMeasurements is set to "Not Configured", the UE shall derive interference measurements for calculating the CSI value reported in uplink time slot n based only on the CSI-IM and / or NZP CSI-RS for interference measurement associated with the CSI resource setting of one CSI report that is no later than the CSI reference time unit. That is, the number of time opportunities of the CSI-IM and / or NZP-CSI-RS used to obtain CSI is not constrained / limited.

[0098] In some implementations, if the high-layer parameter timeRestrictionForInterferenceMeasurements in CSI-ReportConfig is set to "Configured", the UE shall derive the interference measurement used to calculate the CSI value reported in uplink time slot n based on the L occasions of the latest CSI-IM and / or NZP CSI-RS for interference measurement not later than the CSI reference time unit associated with the CSI resource setting of the CSI report. That is, the number of time opportunities of CSI-IM and / or NZP-CSI-RS used to obtain CSI is constrained / limited.

[0099] If the high-level parameter timeRestrictionForChannelMeasurements is set to "Not Configured", the UE shall derive the channel measurement used to calculate the CSI value reported in uplink time slot n only based on the NZP CSI-RS for channel measurement associated with the CSI resource setting that is not later than the CSI reference time unit. That is, the number of time opportunities for NZP CSI-RS for channel measurement used to obtain CSI is not constrained / limited.

[0100] If the high-layer parameter timeRestrictionForChannelMeasurements in CSI-ReportConfig is set to "Configured", the UE shall derive channel measurements for calculating CSI reported in uplink time slot n based only on the latest N opportunities of NZP CSI-RS not later than the CSI reference resource associated with the CSI resource setting of the CSI report. That is, the number of time opportunities of NZP CSI-RS for channel measurement used to obtain CSI is constrained / limited.

[0101] The N time-domain CSI-RS transmission opportunities include more than one type of CSI-RS transmission opportunities. The more than one type of CSI-RS transmission opportunities include at least two of periodic, semi-persistent and aperiodic CSI transmission opportunities.

[0102] For example, the N time-domain CSI-RS transmission opportunities include Y periodic / semi-persistent CSI-RS transmission opportunities and NY aperiodic CSI-RS transmission opportunities.

[0103] Y is equal to or less than N. Y may be greater than or equal to 1.

[0104] In some implementations, the determined CSI includes at least one of PMI, CQI, or TDCP (Time Domain Channel Characteristics).

[0105] Example 2

[0106] The UE determines N time-domain CSI-RS transmission opportunities for channel measurement and L CSI-RS and / or CSI-IM (interference measurement) opportunities for interference measurement, and the UE determines the CSI (channel state indication) of a CSI report based on the N time-domain CSI-RS transmission opportunities for channel measurement and the L CSI-RS and / or CSI-IM opportunities for interference measurement.

[0107] N can be greater than 1.

[0108] L can be equal to or less than N.

[0109] In some implementations, L is greater than or equal to 1.

[0110] In some implementations, L may be greater than N.

[0111] The N time-domain CSI-RS transmission opportunities for channel measurement (or the L CSI-RS and / or CSI-IM opportunities for interference measurement) may correspond to one or more CSI-RS resources.

[0112] For example, N time-domain CSI-RS transmission opportunities for channel measurement correspond to N time-domain transmission opportunities of one periodic CSI-RS resource / semi-persistent CSI-RS resource.

[0113] That is, the N time-domain CSI-RS transmission opportunities for channel measurement correspond to the N time-domain transmission periods of one periodic CSI-RS resource / semi-persistent CSI-RS resource.

[0114] Alternatively, N time-domain CSI-RS transmission opportunities for channel measurement correspond to M CSI-RS resources.

[0115] M is equal to or less than N.

[0116] If N is equal to M, each of the N time-domain CSI-RS transmission opportunities for channel measurement corresponds to one CSI-RS resource.

[0117] In some implementations, the N CSI-RS resources are aperiodic CSI-RS resources.

[0118] like Figure 1As shown, the UE determines N time-domain CSI-RS transmission opportunities for channel measurement and L CSI-RS and / or CSI-IM opportunities for interference measurement, and the UE predicts the CSI on k subsequent time units based on the N time-domain CSI-RS transmission opportunities for channel measurement and the L CSI-RS and / or CSI-IM opportunities for interference measurement. The start of the k time units may be a reference time unit with a shaded portion, such as Figure 2 The start of k time units may be the time slot after the reference time unit with the shaded portion, as shown in Figure 2 shown.

[0119] If L is less than N, the UE obtains N channel measurements and L interference measurements. The UE predicts the PMI over each of k subsequent time units, and the UE reports a set of CQIs shared by the k time units.

[0120] If L is greater than 1, the UE obtains N channel measurements and L interference measurements.

[0121] The UE predicts a PMI on each of k time units and more than one set of CQIs for the k time units. Each of the more than one set of CQIs corresponds to a subset of the k time units. The UE predicts a PMI on each of k subsequent time units, and the UE reports a set of CQIs shared by the k time units.

[0122] For example, the UE predicts 2 sets of CQIs. The first set of CQIs corresponds to the first k / 2 time units of the k time units, and the second set of CQIs corresponds to the last k / 2 time units of the k time units. The UE reports the predicted PMI, and more than one set of CQIs.

[0123] Different CQIs in a set of CQIs correspond to different codewords or different frequency domain units.

[0124] In some implementations, the UE predicts / reports a PMI for each of the k time units, and a set of CQIs for the k time units. The set of CQIs is applied to each of the k time units.

[0125] In some implementations, the UE predicts / reports a PMI for each of the k time units and a set of CQIs for the k time units. The set of CQIs corresponds to one time unit among the k time units.

[0126] In some implementations, the UE reports its capabilities of N and L. N and L are determined by the values ​​reported by the UE because N and L depend on the UE's prediction algorithm.

[0127] In some implementations, N and L are fixed values ​​agreed upon by the UE and the gNB. In some implementations, N and L are configured by the gNB using signaling.

[0128] In some implementations, N is equal to or greater than 5 (or 10). For example, N is one of 5, 8, 10, 15, 20, 25, 30, 22, 80, 87.

[0129] In some implementations, L is equal to or greater than 5 (or 10 or 1). For example, L is one of 1, 5, 8, 10, 22, 87, 15, 20, 25, 30, 80.

[0130] In some implementations, the UE determines at least N time-domain CSI-RS transmission opportunities for channel measurement and L CSI-RS and / or CSI-IM opportunities for interference measurement, and determines a channel state indication (CSI) for a CSI report based on the N time-domain CSI-RS transmission opportunities for channel measurement and the L CSI-RS and / or CSI-IM opportunities for interference measurement.

[0131] In some implementations, the N time-domain CSI-RS transmission opportunities for channel measurement and the L CSI-RS and / or CSI-IM opportunities for interference measurement are no later than one reference time unit, such as Figure 2 The reference time unit may be a time slot.

[0132] In some implementations, a reference unit may be named as a CSI reference resource.

[0133] In some implementations, after the event occurs (or within the duration), the UE reports CSI only after receiving at least N time-domain CSI-RS transmission opportunities for channel measurement and L CSI-RS and / or CSI-IM opportunities for interference measurement, otherwise the UE discards the CSI.

[0134] For example, the event includes at least one of the following: CSI report (re) configuration, serving cell activation, BWP change, or SP-CSI activation.

[0135] If N time-domain CSI-RS transmission opportunities for channel measurement (or L CSI-RS and / or CSI-IM opportunities for interference measurement) correspond to N CSI-RS resources (or L CSI-RS and / or CSI-IM resources), it means that the UE reports the CSI only after receiving at least one time-domain CSI-RS transmission opportunity for each of the N CSI-RS resources and the L CSI-RS and / or CSI-IM opportunities for interference measurement, otherwise the UE discards the CSI.

[0136] In some implementations, when DRX is configured, the UE reports a CSI report only when it receives at least N time-domain CSI-RS transmission opportunities for channel measurement and at least L CSI-RS and / or CSI-IM opportunities for interference measurement that are no later than a reference time unit within the DRX active time, otherwise the report is discarded. If the N time-domain CSI-RS transmission opportunities for channel measurement correspond to N CSI-RS resources, it means that the UE reports a CSI report only when it receives at least one time-domain CSI-RS transmission opportunity for each of the N CSI-RS resources and at least one time-domain opportunity for each of the L CSI-RS and / or CSI-IM opportunities for interference measurement that are no later than a reference time unit within the DRX active time, otherwise the report is discarded. The L CSI-RS and / or CSI-IM opportunities may correspond to the L CSI-RS and / or CSI-IM resources.

[0137] In some implementations, the CSI of one CSI report is reported in one reporting instance. Alternatively, the CSI of one CSI report is reported in more than one reporting instance.

[0138] In some implementations, if the higher-layer parameter timeRestrictionForInterferenceMeasurements is set to "Not Configured", the UE shall derive interference measurements for calculating the CSI value reported in uplink time slot n only based on the CSI-IM and / or NZP CSI-RS for interference measurement associated with the CSI resource setting that is not later than the CSI reference time unit.

[0139] In some implementations, if the higher-layer parameter timeRestrictionForInterferenceMeasurements in CSI-ReportConfig is set to "Configured", the UE shall derive the interference measurement for calculating the CSI value reported in uplink time slot n based on the L occasions of the latest CSI-IM and / or NZP CSI-RS for interference measurement that are no later than the CSI reference time unit associated with the CSI resource setting of the CSI report.

[0140] If the higher layer parameter timeRestrictionForChannelMeasurements is set to "Not Configured", the UE shall derive channel measurements for calculating the CSI value reported in uplink time slot n only based on the NZP CSI-RS associated with the CSI resource setting that is not later than the CSI reference time unit.

[0141] If the higher-layer parameter timeRestrictionForChannelMeasurements in CSI-ReportConfig is set to "Configured", the UE shall derive channel measurements for calculating the CSI reported in uplink timeslot n based only on the N occasions of the latest NZP CSI-RS associated with the CSI resource setting of the CSI report that is no later than the CSI reference resource.

[0142] In some implementations, the UE determines N time-domain CSI-RS transmission opportunities for channel measurement, L CSI-RS and / or CSI-IM opportunities for interference measurement, and C CSI reference time units, and the UE determines the CSI of a CSI report based on the N time-domain CSI-RS transmission opportunities for channel measurement and the L CSI-RS and / or CSI-IM opportunities for interference measurement of the C CSI reference time units, where C is equal to 1 or greater than 1.

[0143] Each of the C CSI reference time units corresponds to at least one of the following: a precoding matrix indicator, a group of CQIs, or a group of CQIs.

[0144] If at least one of the C CSI reference time units is not an available downlink time slot, the UE shall discard the CSI report corresponding to the C CSI reference time units.

[0145] Alternatively, if one or more of the C CSI reference time units is not an available downlink time slot, the UE shall discard the CSI reports corresponding to one or more CSI reference time units and report CSI corresponding to the remaining reference time units of the C CSI reference time units that are available downlink units.

[0146] In a third implementation, if at least one of the C CSI reference time units is not an available downlink time slot, the UE shall report a CSI report corresponding to another reference time unit of the C CSI reference time units.

[0147] If a timeslot in the serving cell includes at least one higher layer configured downlink or flexible symbol and is not within a configured measurement gap for the UE, the timeslot shall be considered as a valid downlink timeslot.

[0148] For example, Figure 1 or Figure 2 As shown, C CSI reference time units include k time units.

[0149] In some implementations, the UE reports C as its capability. In some implementations, C is configured by the gNB.

[0150] The N time-domain CSI-RS transmission opportunities include more than one type of CSI-RS transmission opportunities. The more than one type of CSI-RS transmission opportunities include at least two of periodic, semi-persistent, and aperiodic CSI transmission opportunities.

[0151] For example, the N time-domain CSI-RS transmission opportunities include at least two of Y periodic / semi-persistent CSI-RS transmission opportunities and NY aperiodic CSI-RS transmission opportunities. Y is less than N.

[0152] Similarly, the UE determines L time-domain CSI-IM transmission opportunities and determines the CSI (channel state indicator) of a CSI report. The L time-domain CSI-IM transmission opportunities include more than one type of CSI-IM transmission opportunities. The more than one type of CSI-IM transmission opportunities include at least two of periodic, semi-persistent, and aperiodic CSI transmission opportunities.

[0153] For example, L time-domain CSI-IM transmission opportunities include Y periodic / semi-persistent CSI-RS transmission opportunities and L Y aperiodic CSI-RS transmission opportunities. Y is less than L.

[0154] In some implementations, the determined CSI includes at least one of PMI, CQI, or TDCP (Time Domain Channel Characteristics).

[0155] Example 3

[0156] The UE determines X CSI reference time units, where X is greater than 1.

[0157] In some implementations, the X CSI reference time units, or some of the X CSI reference time units, may be named as CSI reference resources.

[0158] In some implementations, the X CSI reference time units include more than one type of CSI reference time units.

[0159] For example, the X CSI reference time units include two types of CSI reference time units.

[0160] The first of the two types of CSI reference time units is to ensure that the UE has received enough CSI-RS for estimation.

[0161] The second of the two types of CSI reference time units is used to define / calculate CQI / PMI.

[0162] For example, the second type of CSI reference time unit includes k CSI reference time units. The UE predicts a precoding matrix for each of the k CSI reference time units. The starting / first CSI reference time unit in the second type of CSI reference time unit may be a time unit corresponding to a reporting time unit.

[0163] Alternatively, the starting / first CSI reference time unit in the second type of CSI reference time unit may be after the time unit corresponding to the reporting time unit.

[0164] like Figure 3 As shown, the first of the two types of CSI reference time units precedes a reporting time unit in which the UE reports a CSI report.

[0165] The N time-domain CSI-RS transmission opportunities in Example 1 are no later than the first type of CSI reference time unit, or the N time-domain CSI-RS transmission opportunities for channel measurement and the L CSI-RS and / or CSI-IM opportunities for interference measurement are no later than the first type of CSI reference time unit.

[0166] The UE predicts a precoding matrix for each of the k CSI reference time units. The second type CSI reference time unit does not precede the time unit corresponding to the reporting time unit.

[0167] In some implementations, the gap between the first time unit and the reporting time unit in the second type CSI reference time unit is configured by the gNB. Figure 3 As shown, k0 can be configured by the gNB.

[0168] In some implementations, the gap between the first time unit and the reporting time unit in the second type CSI reference time unit is a fixed value, for example, the gap is one or more OFDM symbols (or one or more time slots).

[0169] In some implementations, the gap between the first time unit and the reporting time unit in the second type CSI reference time unit is a fixed value. For example, the gap is determined by at least one of the gap between N CSI-RS time domain opportunities or the period of the CSI-RS resource used for channel measurement.

[0170] In some implementations, a gap between the first time unit and the reporting time unit in the second type of CSI reference time unit is reported by the UE as a UE capability. In some implementations, the UE reports a precoding matrix and / or CQI for each of the first type of CSI reference time unit and the second type of CSI reference time unit.

[0171] In some implementations, the first type CSI reference time unit includes one time unit.

[0172] In some implementations, the gap between the first type of CSI reference time unit and the reporting time unit is determined by at least one of: a value of X, whether the CSI report includes a precoding matrix and / or CQI for the second type of CSI reference time unit.

[0173] For example, the smaller X is, the smaller the gap is. A second CSI report including a precoding matrix and / or CQI of a second type of CSI reference time unit has a larger gap than a first CSI report not including a precoding matrix and / or CQI of a second type of CSI reference time unit.

[0174] In some implementations, the second type CSI reference time unit includes more than one time unit.

[0175] If a timeslot in the serving cell includes at least one higher layer configured downlink or flexible symbol and is not within a configured measurement gap for the UE, the timeslot shall be considered as a valid downlink timeslot.

[0176] In some implementations, if there is no valid downlink timeslot of the first type of CSI reference time unit corresponding to the CSI reporting setting in the serving cell, the CSI report of the serving cell in the uplink timeslot n in which the UE reports the CSI report is omitted.

[0177] In some implementations, if there is no valid downlink time slot for the first type of CSI reference time unit corresponding to the CSI report setting in the serving cell, the CSI report corresponding to the first type of CSI reference time unit of the serving cell in the uplink time slot n in which the UE reports the CSI report is omitted.

[0178] In some implementations, if there is no valid downlink time slot in the serving cell for at least one of the second type of CSI reference time units corresponding to the CSI report setting, the CSI report corresponding to the first type of CSI reference time unit of the serving cell in the uplink time slot n in which the UE reports the CSI report is omitted.

[0179] In some implementations, if there are no valid downlink time slots for some of the second type of CSI reference time units in the serving cell and there is at least one valid downlink time slot for at least one of the second type of CSI reference time units corresponding to the CSI reporting setting, the CSI report of the unavailable downlink of the second type of CSI reference time unit is omitted, and only the CSI of the available downlink of the second type of CSI reference time unit of the serving cell in the uplink time slot n in which the UE reports the CSI report is reported.

[0180] In some implementations, the UE reports the number of available downlinks for the second type of CSI reference time unit in the CSI report.

[0181] Alternatively, the UE does not report the number of available downlink CSI reference time units of the second type in the CSI report because the gNB knows the number based on the downlink or flexible symbol configuration and the measurement gap configuration.

[0182] In some implementations, after the event (or within the DRX active time), if there are less than N time-domain CSI-RS transmission opportunities for channel measurement and / or less than L CSI-RS and / or CSI-IM opportunities for interference measurement no later than the first type of CSI reference time unit, only one CSI report corresponding to the first type of CSI reference time unit is reported. X is 1. The UE only reports the PMI and / or CQI corresponding to the first type of CSI reference time unit.

[0183] In some implementations, after the event (or within the DRX active time), if there are N time-domain CSI-RS transmission opportunities for channel measurement and L CSI-RS and / or CSI-IM opportunities for interference measurement no later than the first type of CSI reference time unit, the UE reports the precoding matrix and / or CQI for each of the first type of CSI reference time unit and the second type of CSI reference time unit.

[0184] In some implementations, after an event (or during a DRX active time), if there are N time-domain CSI-RS transmission opportunities for channel measurement and L CSI-RS and / or CSI-IM opportunities for interference measurement no later than the first type of CSI reference time unit, the UE reports the precoding matrix and / or CQI of the second type of CSI reference time unit. After an event (or during a DRX active time), if there are less than N time-domain CSI-RS transmission opportunities for channel measurement and / or less than L CSI-RS and / or CSI-IM opportunities for interference measurement no later than the first type of CSI reference time unit, the UE reports only the precoding matrix and / or CQI of the first type of CSI reference time unit. After an event (or during a DRX active time), if there is no at least one time-domain CSI-RS transmission opportunity for channel measurement and / or no CSI-RS and / or CSI-IM opportunity for interference measurement no later than the first type of CSI reference time unit, the UE discards the report.

[0185] In some implementations, after the event (or within the DRX active time), if there are no N time-domain CSI-RS transmission opportunities for channel measurement and / or L CSI-RS and / or CSI-IM opportunities for interference measurement no later than the first type of CSI reference time unit, the UE does not report the precoding matrix and / or CQI of the second type of CSI reference time unit.

[0186] In some implementations, the UE reports more than one CQI of the X CSI reference time units or the k second type of CSI reference time units, and the UE reports the index of the CSI reference time unit corresponding to the strongest CQI among the X CSI reference time units, or the index of the k second type of CSI reference time units. Other CQIs are reported using a differential method related to the strongest CQI (multiple).

[0187] In some implementations, when periodic or semi-persistent CSI-RS / CSI-IM or SSB is used for channel / interference measurement, it is not expected that the UE measures channel / interference on the CSI-RS / CCSI-IM / SSB whose last OFDM symbol is received until Z' symbols before the transmission time of the first OFDM symbol of the non-periodic CSI report. Z' is determined by at least one of the following: the value of X, whether the CSI report includes a precoding matrix and / or CQI for a second type of CSI reference time unit. For example, the smaller X, the smaller Z'. Compared with a first CSI report that does not include a precoding matrix and / or CQI for a second type of CSI reference time unit, a second CSI report that includes a precoding matrix and / or CQI for a second type of CSI reference time unit has a larger Z'.

[0188] In some implementations, as with determining Z', Z is determined by at least one of the following: the value of X, whether the CSI report includes a precoding matrix and / or CQI for a second type of CSI reference time unit. For example, the smaller X is, the smaller Z is. A second CSI report including a precoding matrix and / or CQI for a second type of CSI reference time unit is larger than a first CSI report not including a precoding matrix and / or CQI for a second type of CSI reference time unit. Z is the gap between the DCI that triggers aperiodic (or semi-persistent CSI reporting) and the PUCCH / PUSCH that includes the CSI report.

[0189] In some implementations, to calculate the CQI, the UE assumes the same parameters for each of the X CSI reference time units or for each of the k second type reference time units. For example, the parameters include at least one of the following: the number of OFDM symbols occupied by control signaling, the number of PDSCH and DMRS, the bandwidth part subcarrier spacing, the bandwidth, the CP length and subcarrier spacing, the resource elements used by the primary synchronization signal or the secondary synchronization signal or the PBCH, the redundancy version 0, the ratio of PDSCH EPRE to CSI-RS EPRE, the REs allocated for NZP CSI-RS and ZP CSI-RS, the number of front-loaded DM-RS symbols, the same number of additional DM-RS symbols, whether the PDSCH symbol contains DM-RS, and the PRB bundling size.

[0190] In some implementations, the X CSI reference time units include a third type of CSI reference time unit corresponding to a PMI and a fourth type of CSI reference time unit corresponding to a CQI. For example, one CSI reference time unit of the k second type of CSI reference time units corresponds to a CQI, and each of the k second types of reference time units corresponds to a group of PMIs. The third type of CSI reference time unit includes one of the k second type of CSI reference time units, and the fourth type of CSI reference time unit includes the k second type of CSI reference time units.

[0191] In some implementations, the third type of CSI reference time unit and the fourth type of CSI time unit include the same set of time units.

[0192] In some implementations, if the report includes a CSI report in a second type of CSI reference time unit, timeRestrictionForChannelMeasurements may not be configured.

[0193] In some implementations, if the report includes a CSI report in a second type of CSI reference time unit, timeRestrictionForInterferenceMeasurements may not be configured.

[0194] In some implementations, the determined CSI includes at least one of PMI, CQI, or TDCP (Time Domain Channel Characteristics).

[0195] In some implementations, such as Figure 6 As shown, TDCP corresponds to one or more reference time units and is based on N time domain transmission opportunities of channel measurement.

[0196] Example 4

[0197] The UE determines N time-domain CSI-RS transmission opportunities, and determines CSI of a CSI report based on the N time-domain CSI-RS transmission opportunities.

[0198] N is greater than 1.

[0199] N time-domain CSI transmission opportunities may be used for channel measurement, as shown in Example 1, 2, or 3.

[0200] Alternatively, N time-domain CSI transmission opportunities may be used for interference measurement, as shown in Examples 1, 2 or 3.

[0201] The N time-domain CSI-RS transmission opportunities include more than one type of CSI-RS transmission opportunities.

[0202] More than one type of CSI-RS transmission opportunity includes periodic, semi-persistent, and aperiodic CSI transmission opportunities.

[0203] For example, N time-domain CSI-RS transmission opportunities include Y periodic / semi-persistent CSI-RS transmission opportunities and NY aperiodic CSI-RS transmission opportunities. Y is less than N.

[0204] Similarly, the UE determines L time-domain CSI-IM transmission opportunities and determines the CSI (channel state indicator) of a CSI report. The L time-domain CSI-RS transmission opportunities include more than one type of CSI-RS transmission opportunities. The type of CSI-IM transmission opportunity includes periodic, semi-persistent and aperiodic CSI transmission opportunities.

[0205] For example, L time-domain CSI-RS transmission opportunities include Y periodic / semi-persistent CSI-RS transmission opportunities and L Y aperiodic CSI-RS transmission opportunities. Y is less than L.

[0206] In some implementations, the CSI report is an aperiodic CSI report.

[0207] In some implementations, the determined CSI includes at least one of PMI, CQI, or TDCP (Time Domain Channel Characteristics).

[0208] Example 5

[0209] A CMR of a CSI report includes more than one type of CSI-RS resource. The type of CSI-RS resource includes periodic, semi-persistent and aperiodic CSI-CS-RS resources. For example, a CMR of a CSI report includes N1 CSI-RS resource sets. N1 CSI-RS resource sets include Y1 periodic CSI-RS resource sets and N1-Y1 aperiodic CSI-RS resource sets. N1 is greater than 1. Y1 is less than N1.

[0210] like Figure 4 As shown, a CSI report includes a periodic CSI-RS set and an aperiodic set. Each of a periodic CSI-RS set and an aperiodic set includes one or more CSI-RS resources.

[0211] Example 6

[0212] Even for CSI-RS with 15kHz subcarrier spacing, the triggering offset of one semi-persistent / aperiodic CSI-RS resource set may be greater than one of 32-127.

[0213] In this application, one CSI report corresponds to one setting of the CSI configuration, such as one CSI report corresponds to one CSI report configuration.

[0214] Figure 7 An exemplary block diagram of a hardware platform 700 is shown, which may be part of a network device (e.g., a base station) or a communication device (e.g., a user equipment (UE)). The hardware platform 700 includes at least one processor 710 and a memory 705 having instructions stored thereon. The instructions, when executed by the processor 610, configure the hardware platform 700 to perform Figures 1 to 5 and Figure 7 As well as the operations described in the various embodiments described in this patent document. Transmitter 715 sends or transmits information or data to another device. For example, a network device transmitter can send a message to a user device. Receiver 720 receives information or data sent or transmitted by another device. For example, a user device can receive a message from a network device.

[0215] The implementation described above will be applied to wireless communications. Figure 8An example of a wireless communication system (e.g., a 5G or NR cellular network) including a base station 820 and one or more user equipments (UEs) 811, 812, and 813 is shown. In some embodiments, the UE uses a communication link to the network (sometimes referred to as an uplink direction, as shown by dashed arrows 831, 832, 833) to access the BS (e.g., the network), which then enables subsequent communication from the BS to the UE (e.g., shown in the direction from the network to the UE, sometimes referred to as a downlink direction, as shown by arrows 841, 842, 843). In some embodiments, the BS sends information to the UE (sometimes referred to as a downlink direction, as shown by arrows 841, 842, 843), which then enables subsequent communication from the UE to the BS (e.g., shown in the direction from the UE to the BS, sometimes referred to as an uplink direction, as shown by dashed arrows 831, 832, 833). The UE can be, for example, a smartphone, a tablet, a mobile computer, a machine-to-machine (M2M) device, an Internet of Things (IoT) device, etc.

[0216] Fig. 9 An example of a process for wireless communication based on some example embodiments of the disclosed technology is shown.

[0217] In some embodiments of the disclosed technology, a wireless communication method 900 includes: at 910, determining, by a wireless communication device, at least N time domain transmission opportunities of a measurement element of at least one of a channel state information reference signal (CSI-RS) or a channel state interference measurement (CSI-IM), where N is an integer greater than 1; at 920, determining, by the wireless communication device, first channel state information CSI of a CSI report based on the at least N time domain transmission opportunities of at least one of the CSI-RS or CSI-IM; and at 930, sending, by the wireless communication device, the first channel state information

[0218] Fig.10 An example of a process for wireless communication based on some example embodiments of the disclosed technology is shown.

[0219] In some embodiments of the disclosed technology, a wireless communication method 1000 includes: at 1010, a wireless communication node receives first channel state information from a wireless communication device, wherein the first channel state information is determined by: the wireless communication device determines at least N time domain transmission opportunities of a channel state information reference signal (CSI-RS) or a channel state interference measurement (CSI-IM), where N is an integer greater than 1; and the wireless communication device determines first channel state information CSI for a CSI report based on the at least N time domain transmission opportunities of the CSI-RS or CSI-IM.

[0220] Fig.11 An example of a process for wireless communication based on some example embodiments of the disclosed technology is shown.

[0221] In some embodiments of the disclosed technology, a wireless communication method 1100 includes: at 1110, determining, by a wireless communication device, X reference time units for a channel state information (CSI) report, where X is an integer greater than or equal to 1, at 1120, determining, by the wireless communication device, first channel state information (CSI) corresponding to one or more time units of the X reference time units, and at 1130, reporting, by the wireless communication device, the first CSI to a wireless communication node.

[0222] Fig.12 An example of a process for wireless communication based on some example embodiments of the disclosed technology is shown.

[0223] In some embodiments of the disclosed technology, a wireless communication method 1200 includes: at 1210, receiving, by a wireless communication node, first channel state information (CSI) from a wireless communication device, wherein the CSI is determined by: determining, by the wireless communication device, X reference time units for a CSI report, where X is an integer greater than or equal to 1; and determining, by the wireless communication device, the first CSI corresponding to one or more time units of the X reference time units.

[0224] It should be understood that this document discloses techniques that can be implemented in various embodiments to determine downlink control information in a wireless network. The disclosed and other embodiments, modules, and functional operations described in this document can be implemented in a digital electronic circuit system, or in computer software, firmware, or hardware, including the structures disclosed in this document and their structural equivalents, or in a combination of one or more of them. The disclosed and other embodiments can be implemented as one or more computer program products, that is, one or more modules of computer program instructions encoded on a computer-readable medium, which are used to be executed by a data processing device or control the operation of the data processing device. The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of matter that affects a machine-readable propagation signal, or a combination of one or more of them. The term "data processing device" includes all devices, equipment, and machines for processing data, such as a programmable processor, a computer, or multiple processors or computers. In addition to hardware, the device may also include code that creates an execution environment for the computer program in question, such as code that constitutes a processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more of them. A propagated signal is an artificially generated signal, such as a machine-generated electrical, optical, or electromagnetic signal, that is generated to encode information for transmission to suitable receiver apparatus.

[0225] The disclosed and other embodiments, modules and functional operations described in this document may be implemented in digital electronic circuit systems, or in computer software, firmware or hardware, including the structures disclosed in this document and their structural equivalents, or in a combination of one or more of them. The disclosed and other embodiments may be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a computer-readable medium, which are used to be executed by a data processing device or control the operation of the data processing device. The computer-readable medium may be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of matter that affects a machine-readable propagation signal, or a combination of one or more of them. The term "data processing device" includes all devices, equipment and machines for processing data, including, for example, a programmable processor, a computer or multiple processors or computers. In addition to hardware, the device may also include code that creates an execution environment for the computer program in question, for example, code that constitutes a processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more of them. A propagated signal is an artificially generated signal, such as a machine-generated electrical, optical or electromagnetic signal, which is generated to encode information for transmission to a suitable receiver device.

[0226] A computer program (also referred to as a program, software, software application, script, or code) may be written in any form of programming language, including compiled or interpreted languages, and may be deployed in any manner, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program may be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files storing one or more modules, subroutines, or code portions). A computer program may be deployed to execute on one computer or on multiple computers that are located at one site or distributed between multiple sites and interconnected by a communications network.

[0227] The processes and logic flows described in this document may be performed by one or more programmable processors executing one or more computer programs to perform functions by operating on input data and generating output. The processes and logic flows may also be performed by, and apparatus may also be implemented as, special purpose logic circuitry, such as an FPGA (field programmable gate array) or an ASIC (application specific integrated circuit).

[0228] For example, processors suitable for executing computer programs include both general-purpose and special-purpose microprocessors, and any one or more processors of any kind of digital computer. Typically, the processor will receive instructions and data from a read-only memory or a random access memory or both. The basic elements of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. In general, a computer will also include one or more large-capacity storage devices for storing data, such as magnetic disks, magneto-optical disks, or optical disks, or be operably coupled to receive data from such large-capacity storage devices or to transmit data to them or both. However, a computer does not necessarily have such a device. Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media, and memory devices, including, for example, semiconductor memory devices, such as EPROM, EEPROM, and flash memory devices; magnetic disks, such as internal hard disks or removable disks; magneto-optical disks; and CD ROM and DVD-ROM disks. The processor and memory can be supplemented by a dedicated logic circuit system, or incorporated into the dedicated logic circuit system.

[0229] Through the above method and system, the UE can predict the CSI of some reference time units and track the rapidly changing channels well. The overhead of reporting CSI is reduced. A method is provided for reporting CSI when the UE receives less than N / L or zero time domain opportunities no later than the first reference time unit. In this case, the UE and the gNB can know the CSI well without additional signaling. In this case, the gNB can know at least the second CSI, so in this case, the gNB can schedule the UE well.

[0230] Although this document contains a lot of details, these details should not be interpreted as limitations on the scope of the claimed invention or the content that can be claimed, but rather as descriptions of specific features of specific embodiments. Certain features described in this document in the context of a single embodiment may also be implemented in combination in a single embodiment. On the contrary, the various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments. In addition, although features may be described above as working in certain combinations, even initially claimed as such, in some cases, one or more features from the claimed combination may be deleted from the combination, and the claimed combination may point to a variant of a sub-combination or a sub-combination. Similarly, although operations are described in a particular order in the accompanying drawings, this should not be understood as requiring such operations to be performed in the particular order shown or in sequence or requiring all the operations shown to be performed to achieve the desired result.

[0231] Only a few examples and implementations are disclosed. Variations, modifications, and enhancements may be made to the described examples and implementations and other implementations based on what is disclosed.

Claims

1. A wireless communication method, comprising: Determining, by the wireless communication device, at least N time domain transmission opportunities of a measurement element of at least one of a channel state information reference signal (CSI-RS) or a channel state interference measurement (CSI-IM), where N is an integer greater than 1; Determining, by the wireless communication device, first channel state information CSI of a CSI report based on the at least N time domain transmission opportunities of at least one of a CSI-RS or a CSI-IM; and The first channel state information is sent by the wireless communication device.

2. A wireless communication method, wherein a wireless communication node receives first channel state information from a wireless communication device, wherein the first channel state information is determined by: Determining, by the wireless communication device, at least N time domain transmission opportunities of a channel state information reference signal (CSI-RS) or a channel state interference measurement (CSI-IM), where N is an integer greater than 1; The wireless communication device determines first channel state information CSI of a CSI report based on the at least N time domain transmission opportunities of the CSI-RS or the CSI-IM.

3. The method according to claim 1 or 2, wherein the at least N time domain transmission opportunities correspond to at least one or more CSI-RS resources, or one or more CSI-IM resources.

4. The method according to claim 1 or 2, further comprising at least one of the following: When the condition is met, the wireless communication device discards and / or stops sending the one CSI report; When the condition is met, the wireless communication node discards and / or stops receiving the one CSI report; If the condition is met, the wireless communication device stops sending the first CSI; If the condition is met, the wireless communication node stops receiving the first CSI; When the condition is met, the wireless communication device determines and sends a second CSI; or When the condition is met, the wireless communication node receives second CSI.

5. The method according to claim 4, wherein the first CSI or the second CSI satisfies at least one of the following: The first CSI corresponds to a reference time unit of a second type; The second CSI corresponds to a reference time unit of a first type; or The first CSI and the second CSI correspond to different sets of reference time units. 6 . The method according to claim 5 , wherein the second type of reference time unit includes one or more time units, and the one or more time units are not before the time unit in which the first communications device transmits the first CSI or the second CSI. 7 . The method according to claim 5 , wherein the first type of reference time unit includes one or more time units, and the one or more time units are before the time unit in which the first communication device sends the first CSI or the second CSI.

8. The method according to claim 5, comprising at least one of the following: The reference time unit of the second type includes one or more time units, and the reference time unit of the first type includes one time unit; The first type of reference time units comprises a subset of the second type of reference time units.

9. The method according to claim 4, wherein the condition comprises at least one of the following: receiving, by the wireless communication device, D time domain transmission opportunities of the CSI-RS or CSI-IM no later than a reference time unit after an event; The wireless communication device receives D time domain transmission opportunities of the CSI-RS or CSI-IM that are no later than a reference time unit within a (discontinuous reception) DRX active time; receiving, by the wireless communication device, D time domain transmission opportunities of the CSI-RS or CSI-IM that are no later than a reference time unit within an activity duration of a configuration parameter, The wireless communication node sends D time domain transmission opportunities of the CSI-RS or CSI-IM no later than a reference time unit after an event; The wireless communication node sends D time domain transmission opportunities of the CSI-RS or CSI-IM that are no later than a reference time unit within a (discontinuous reception) DRX activity time; or The wireless communication node sends D time domain transmission opportunities of the CSI-RS or CSI-IM that are no later than a reference time unit within an activity duration of a configuration parameter, Where D is less than N and greater than or equal to 1.

10. The method according to claim 4, wherein the condition comprises at least one of the following: A time domain transmission opportunity of the CSI-RS or CSI-IM not later than a reference time unit after an event is not received by the wireless device; The wireless device does not receive a time domain transmission opportunity of the CSI-RS or CSI-IM that is no later than the reference time unit within a (discontinuous reception) DRX active time; A time domain transmission opportunity of the CSI-RS or CSI-IM not later than a reference time unit within an activity duration of a configuration parameter is not received by the wireless device; A time domain transmission opportunity of the CSI-RS or CSI-IM not later than a reference time unit after an event is not sent by the wireless node; The wireless node does not send a time domain transmission opportunity of the CSI-RS or CSI-IM that is not later than the reference time unit within a (discontinuous reception) DRX active time; or A time domain transmission opportunity of the CSI-RS or CSI-IM that is not later than a reference time unit within an activity duration of a configuration parameter is not sent by the wireless node.

11. The method according to any one of claims 1 to 10, wherein the at least N time domain transmission opportunities of the CSI-RS are used for channel measurement or for interference measurement.

12. The method according to claim 4, wherein the condition comprises at least one of the following: The wireless communication device receives only D time domain transmission opportunities of the CSI-RS or CSI-IM that are no later than a reference time unit after an event; The wireless communication device receives only D time domain transmission opportunities of the CSI-RS or CSI-IM that are not later than a reference time unit within a (discontinuous reception) DRX active time; The wireless communication device receives only D time domain transmission opportunities of the CSI-RS or CSI-IM that are no later than a reference time unit within an activity duration of a configuration parameter, The wireless communication node only sends D time domain transmission opportunities of the CSI-RS or CSI-IM that are no later than a reference time unit after an event; The wireless communication node only sends D time domain transmission opportunities of the CSI-RS or CSI-IM that are not later than a reference time unit within a (discontinuous reception) DRX active time; or The wireless communication node only sends D time domain transmission opportunities of the CSI-RS or CSI-IM that are no later than a reference time unit within an activity duration of a configuration parameter, Where D is less than N and greater than or equal to 1.

13. The method according to claim 4, wherein the condition comprises at least one of the following: receiving, by the wireless communication device, D time domain transmission opportunities of the CSI-RS for channel measurement no later than a reference time unit after an event; Receiving, by the wireless communication device, E time domain opportunities of CSI-RS and / or CSI-IM for interference measurement no later than the reference time unit after an event; The wireless communication device receives D time domain transmission opportunities of the CSI-RS for channel measurement that are no later than a reference time unit within a (discontinuous reception) DRX active time; The wireless communication device receives E time domain opportunities of CSI-RS and / or CSI-IM for interference measurement that are not later than the reference time unit during the DRX active time; The wireless communication device receives D time domain transmission opportunities of the CSI-RS for channel measurement that are no later than a reference time unit within an activity duration of a configuration parameter; Receiving, by the wireless communication device, E time domain opportunities of CSI-RS and / or CSI-IM for interference measurement no later than the reference time unit within an activity duration of a configuration parameter; Wherein D is less than N, E is less than L, and L is an integer greater than 0.

14. The method according to claim 1, 2 or 13, further comprising: Determining, by the wireless communication device, the at least N time domain transmissions for channel measurement and at least L time domain opportunities of a CSI-RS or a CSI-IM for interference measurement; The wireless communication device determines the first CSI based on the at least N time domain transmissions for channel measurement and at least L time domain opportunities of the CSI-RS or CSI-IM for interference measurement; The first CSI is sent by the wireless communication device, Wherein L is greater than or equal to 1, and / or L is N or less than N.

15. The method of any one of claims 9, 10, 12 or 13, wherein the event is at least one of: 1) CSI report configuration, 2) CSI report reconfiguration, 3) serving cell activation, 4) BWP change, or 5) activation of SP-CSI.

16. The method according to any one of claims 1 to 15, wherein the first CSI is determined based on a status of a time restriction for channel measurement, the method further comprising at least one of the following: When the state of the time limit is "unconfigured", the first CSI is determined based on the at least N time domain transmission opportunities of the CSI-RS for channel measurement that are no later than a reference time unit; When the state of the time limit is "configured", the CSI is determined based on only N time domain transmission opportunities of the CSI-RS for channel measurement that are latest and no later than a reference time unit.

17. The method according to any one of claims 1 to 16, wherein the at least N transmission opportunities include at least two of the following transmission opportunities: 1) periodic transmission opportunities, 2) semi-persistent transmission opportunities, and / or 3) non-periodic transmission opportunities.

18. A method according to any one of claims 1 to 16, wherein the one report is associated with more than one type of CSI-RS resources used for channel measurement, wherein the type of CSI-RS resources includes at least one of the following resource types: 1) periodic, 2) semi-persistent, and / or 3) non-periodic.

19. The method according to any one of claims 1 to 18, wherein the first CSI comprises CSI corresponding to F reference time units, where F is an integer greater than 1 or equal to.

20. The method of claim 19, further comprising determining, by the wireless communication device or the wireless communication node, at least one of the following: The status of the time limit for channel measurements and / or interference measurements depends on F; or The status of the time limitation for channel measurement and / or interference measurement depends on the type of the F reference time units.

21. The method according to claim 20, wherein the state of the time limit satisfies at least one of the following: When the F reference time units include time units of the second type, or when F is greater than 1, the time limit for channel measurement and / or interference measurement is not configured; or When F is less than 2, or when the F reference time units include time units of the first type, the time limit for channel measurement and / or interference measurement is configured or not configured.

22. The method according to claim 19, wherein the F reference time units satisfy at least one of the following: The first time unit among the F reference time units is a reporting time slot including the first CSI; a gap between the first time unit in the F reference time units and the reporting time slot including the first CSI, determined by received signaling; The gap between the first time unit among the F reference time units and the reporting time slot including the first CSI is determined by a parameter of the CSI-RS or CSI-IM; The F reference time units do not precede the reporting time slot including the first CSI; The F reference time units include time units after a reporting time slot including the first CSI.

23. The method of claim 19, wherein F is determined by at least the value of: N; a capability report reported by the wireless communication device; or received signaling from the wireless communication node.

24. The method of claim 19, wherein the F reference time units are consecutive or non-consecutive.

25. The method according to claims 4 and 19, wherein the conditions include at least one of the following: None of the F reference time units is an available downlink time unit; or At least one of the F reference time units is not an available downlink time unit.

26. The method according to claim 19, wherein the first CSI satisfies at least one of the following: The first CSI includes a PMI for each time unit in a first set of time units; The first CSI comprises a CQI for each time unit in a second set of time units; The first CSI includes a PMI and a CQI, each PMI and CQI corresponds to a different type of time unit in the F reference time units, The first time unit set and the second time unit set include time units in the F reference time units.

27. The method according to any one of claims 1 to 26, wherein N satisfies at least one of the following: N is greater than or equal to 5; N is one of 5, 10, 15 or 20; N is included in a capability report reported by the wireless communication device to the wireless communication node; or N is determined by received signaling.

28. The method according to any one of claims 1 to 27, wherein L satisfies at least one of the following: L is greater than or equal to 5; L is one of 5, 10, 15 or 20; L is included in a capability report reported by the wireless communication device to the wireless communication node; or L is determined by received signaling.

29. The method according to claim 1, wherein the at least N time domain transmission opportunities are no later than a reference time unit.

30. The method of claim 14, wherein the at least L time domain opportunities for interference measurement are no later than a reference time unit.

31. The method according to any one of claims 1 to 30, wherein the first CSI is determined based on a status of a time restriction for interference measurement, the method further comprising at least one of the following: When the state of the time limit for interference measurement is “not configured”, the first CSI is determined based on the at least L time domain opportunities of the CSI-RS and / or CSI-IM for interference measurement; When the state of the time restriction for interference measurement is "configured", the CSI is determined based only on the latest L time domain opportunities of the CSI-RS and / or CSI-IM for interference measurement that are no later than a reference time unit.

32. The method of claim 19, wherein the first CSI is based on an assumption of a parameter, wherein the F reference time units have the same or different assumptions of the parameter, and / or the determined CSI comprises at least one of a PMI, a CQI, or a time domain channel characteristic.

33. A wireless communication method, comprising: Determining, by the wireless communication device, X reference time units for a channel state information (CSI) report, where X is an integer greater than or equal to 1; determining, by the wireless communication device, first channel state information (CSI) corresponding to one or more time units of the X reference time units; as well as The first CSI is reported by the wireless communication device to a wireless communication node.

34. A wireless communication method, comprising receiving, by a wireless communication node, first channel state information (CSI) from a wireless communication device, wherein the CSI is determined by: Determining, by the wireless communication device, X reference time units for one CSI report, where X is an integer greater than or equal to 1; and The first CSI corresponding to one or more time units of the X reference time units is determined by the wireless communication device.

35. A method according to claim 33 or 34, wherein the X reference time units include more than one type of time unit.

36. The method of claim 33 or 34, wherein the X reference time units include time units of a first type and time units of a second type, wherein at least one of the following items of the one report: a time domain transmission timing of channel measurement and a time domain timing of interference measurement are not later than the time unit of the first type, The second type of time unit includes: The one or more time units of the X reference time units corresponding to the first CSI.

37. The method according to claim 33 or 34, when X is greater than 1 and / or when the X reference time units include a time unit after a reporting time slot including the first CSI, a time limit for channel measurement or for interference measurement is not configured.

38. The method according to claim 33 or 34, wherein the X reference time units satisfy at least one of the following: A first time unit among the X reference time units is a reporting time slot including a first CSI; a gap between the first time unit among the X reference time units and the reporting time slot including the first CSI, determined by received signaling; The gap between the first time unit in the X reference time units and the reporting time slot including the first CSI is determined by a parameter of a CSI-RS or a CSI-IM; The X reference time units do not precede the reporting time slot including the CSI; Wherein X is included in the capability report of the wireless communication device.

39. The method of claim 33 or 34, wherein the X time units are continuous or non-continuous.

40. The method according to claim 33 or 34, wherein the first CSI satisfies at least one of the following: The first CSI includes a PMI for each time unit in a first set of time units; The first CSI includes a CQI for each time unit in a second set of time units; wherein the first set of time units and the second set of time units include time units in the X time units.

41. The method according to claim 33 or 34, further comprising at least one of the following: If the condition is met, the wireless communication device discards the first CSI; or If the condition is met, the wireless communication node stops receiving the first CSI; If the condition is met, determining and reporting a second CSI by the wireless communication device; or If the condition is met, the second CSI is received by the wireless communication node.

42. The method of claim 41, wherein the conditions include: It is determined by the wireless communication node or the wireless communication device that there are no valid time domain resources available for the reference time units of a first type included in the X reference time units.

43. The method of claim 41, wherein the conditions include: It is determined by the wireless communication node or the wireless communication device that all of the second type of reference time units among the X reference time units are not valid downlink time units; or It is determined by the wireless communication node or the wireless communication device that at least one reference time unit of the second type of reference time units among the X reference time units is not a valid downlink time unit.

44. A method according to claim 33 or 34, wherein when 1) the wireless communication device identifies less than N transmission opportunities for channel measurement and / or less than L transmission opportunities for interference measurement that are no later than a first type of reference unit, or 2) X is 1, the first CSI includes CSI corresponding only to the first type of reference time unit.

45. A method according to claim 33 or 34, wherein when 1) the wireless communication device identifies at least N transmission opportunities for channel measurement and / or at least L transmission opportunities for interference measurement that are no later than a first type of reference time unit, the first CSI includes CSI for each reference time unit in the first type of reference time unit and a second type of reference time unit.

46. ​​A method according to claim 33 or 34, wherein when 1) the wireless communication device identifies less than N transmission opportunities for channel measurement and less than L transmission opportunities for interference measurement no later than the first type of reference time unit, the CSI report does not include a precoding matrix and / or CQI for a second type of reference time unit included in the X reference time units.

47. The method of claim 33 or 34, wherein the first CSI comprises a time unit index corresponding to a maximum CQI value among a plurality of CQI values, each CQI value in the plurality of CQI values ​​corresponding to one time unit among the X time units.

48. The method according to claim 33 or 34, further comprising: The gap is determined by the wireless communication device based on at least one of: 1) X; 2) whether the CSI includes CSI corresponding to a second type of reference time unit; or 3) parameters of the X reference time units.

49. The method of claim 48, wherein the gap comprises at least one of: a gap between a reference time unit of a first type and a time slot in which the wireless communication device reports the CSI report; a gap between the DCI triggering the first CSI and the following time slot, in which the wireless communication device reports the first CSI; The gap between the last OFDM symbol of the one reported measurement reference signal or measurement resource and the following time slot, in which the wireless communication device reports the first CSI.

50. The method of claim 33 or 34, wherein X is determined by at least one of: X is included in a capability report reported by the wireless communication device to the wireless communication node; X is determined by the received signaling; X is included in the CSI report; or X is determined by parameters of the one reported measurement reference signal.

51. The method of claim 33 or 34, wherein the first CSI comprises at least one of: a PMI, a CQI, or a time domain channel characteristic.

52. An apparatus for wireless communication, comprising: A processor configured to implement the method according to any one of claims 1 to 51.

53. A computer-readable storage medium having codes stored thereon, which, when executed by a processor, cause the processor to implement the method according to any one of claims 1 to 51.

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