CSI reports including outdated channel state information (CSI) reports

Abstract

Some aspects of the present disclosure relate to apparatuses and methods for implementing CSI reporting including outdated channel state information (CSI) reports. A user equipment (UE) performs CSI measurements during a current reference time period at least partially based on a CSI reporting configuration, and generates one or more CSI reports including at least an outdated CSI report. The outdated CSI report is generated at least partially based on CSI measurements performed prior to the current reference time period. The UE further generates an uplink message including the one or more CSI reports, and transmits the uplink message to the base station under a reporting setting determined by the CSI reporting configuration.

Description

Background Art Technical Field

[0002] The described aspects generally relate to reporting channel information in wireless communications.

[0003] Related art

[0004] A user equipment (UE) communicating with a base station (e.g., evolved Node B (eNB), next generation Node B (gNB), or other base station) via a communication link may measure channel characteristics of the communication link. For example, the UE may measure how a signal propagates from the base station to the UE on a downlink channel. The UE may generate a channel state information (CSI) report based on the measured channel characteristics. The UE may transmit the CSI report in an uplink message to the base station. The base station may use the received CSI report included in the uplink message to adjust its transmission to the UE based on the channel characteristics reported by the UE. Summary of the Invention

[0005] Some aspects of the present disclosure relate to apparatuses and methods for implementing CSI reports including outdated channel state information (CSI) reports for a wireless communication system (e.g., a wireless communication system based on 3rd Generation Partnership Project (3GPP) Release 16 (Rel-16), Release 17 (Rel-17)) or later versions). For example, systems and methods are provided for implementing designs for reporting New Radio (NR) multiple input / multiple output (MIMO) CSI reports or NR further enhanced MIMO (FeMIMO) CSI reports.

[0006] Some aspects of the present disclosure relate to a user equipment (UE). The UE includes: a transceiver configured to communicate with a base station via a wireless network; and a processor communicatively coupled to the transceiver. The processor uses the transceiver and receives a downlink message including CSI report configuration from the base station. The processor performs CSI measurements during a current reference period at least in part based on the CSI report configuration. The processor further generates one or more CSI reports, where the one or more CSI reports at least include an outdated CSI report. The outdated CSI report is generated at least in part based on CSI measurements performed before the current reference period. In some examples, the one or more CSI reports further include a current CSI report generated at least in part based on the CSI measurements performed during the current reference period. Thereafter, the processor generates an uplink message including the one or more CSI reports. The processor further transmits the uplink message to the base station using the transceiver under a reporting setting determined by the CSI report configuration. The reporting setting may include an aperiodic setting, a periodic setting, or a semi-persistent setting.

[0007] In some examples, these CSI measurements performed during the current reference time period include measurements of parameters selected from: CSI reference signal (CSI-RS) resource indicator (CRI), synchronization signal / physical broadcast channel (PBCH) block resource indicator (SSBRI), layer 1 reference signal received power (L1-RSRP), rank indicator (RI), precoding matrix indicator (PMI), layer indicator (LI), channel quality indicator (CQI), or signal-to-interference-plus-noise ratio (SINR). Additionally, these CSI measurements performed during the current reference time period include measurements collected for each of a plurality of signal paths between a plurality of antenna ports at the base station and the UE.

[0008] In some examples, a CSI report may include multiple parts, where a part of the CSI report may include multiple groups. For example, a CSI report may include a first part and a second part, where the second part may further include group 0, group 1, and group 2. Thus, the outdated CSI report may include a first part generated at least in part based on CSI measurements performed during the current reference time period and a second part generated at least in part based on CSI measurements performed prior to the current reference time period. In some examples, the outdated CSI report may include a certain group of the second part generated at least in part based on CSI measurements performed prior to the current reference time period, while some other groups of the second part are generated at least in part based on CSI measurements performed during the current reference time period.

[0009] In some examples, the uplink message may include a first part of the outdated CSI report generated at least in part based on these CSI measurements performed during the current reference time period and a second part of the outdated CSI report generated at least in part based on these CSI measurements performed prior to the current reference time period. Additionally or alternatively, the uplink message may include the first part of the outdated CSI report generated at least in part based on CSI measurements performed prior to the current reference time period, while the second part of the outdated CSI report is not included in the uplink message.

[0010] In some examples, the uplink message may further include an indicator for indicating that the outdated CSI report has an outdated status. When the one or more CSI reports include a current CSI report and an outdated CSI report, the uplink message further includes a first indicator for indicating that the outdated CSI report has an outdated status and a second indicator for indicating that the current CSI report has a current status. In some examples, the uplink message may include a CSI report table that includes the outdated CSI report, the first indicator, the current CSI report, and the second indicator.

[0011] In some examples, to complete CSI reporting to the base station, the uplink message may be carried by a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH). In some examples, the reporting configuration includes semi-persistent configurations or aperiodic configurations activated by Downlink Control Information (DCI). Additionally, the DCI activates semi-persistent CSI reference signals to perform these CSI measurements in a semi-persistent or aperiodic manner. In some examples, the semi-persistent CSI reference signal is activated after a predetermined period of time from when the DCI is received.

[0012] In some examples, multiple CSI reports included in the uplink message have relative priorities, and the outdated CSI report has the lowest priority among the multiple CSI reports included in the uplink message. In some examples, the multiple CSI reports have relative priorities according to the following priority sequence: CSI reports including Layer 1 Reference Signal Received Power (L1-RSRP) or Signal-to-Interference-plus-Noise Ratio (SINR) > CSI reports including other reportQuantity, where reportQuantity is configured as part of the CSI report configuration in RRC; and Aperiodic (AP) CSI reports > Semi-Persistent (SP) CSI reports carried by the Physical Uplink Shared Channel (PUSCH) > Semi-Persistent (SP) CSI reports carried by the Physical Uplink Control Channel (PUCCH) > Periodic CSI reports carried by the PUCCH, where the symbol ">" means "has higher priority".

[0013] Some aspects of the present disclosure relate to a method. The method includes: receiving, by a UE and from a base station, a downlink message including a CSI report configuration; and generating multiple CSI reports. The multiple CSI reports include at least an outdated CSI report based at least in part on CSI measurements performed before a current reference period and a current CSI report based at least in part on CSI measurements performed during the current reference period and at least in part based on the CSI report configuration. Thereafter, the method includes: generating an uplink message including the multiple CSI reports; and transmitting the uplink message to the base station under a reporting configuration determined by the CSI report configuration.

[0014] Some aspects of the present disclosure relate to non-transitory computer-readable media storing instructions. When these instructions are executed by a processor of a UE, the instructions cause the processor to perform operations including: receiving a downlink message including a CSI report configuration from a base station. These operations further include: performing CSI measurements during a current reference period at least in part based on the CSI report configuration. Additionally, these operations include: generating a plurality of CSI reports. The plurality of CSI reports includes at least an outdated CSI report based at least in part on CSI measurements performed before the current reference period and a current CSI report based at least in part on CSI measurements performed during the current reference period. These operations also include: generating an uplink message including the plurality of CSI reports; and transmitting the uplink message to the base station under a reporting setting determined by the CSI report configuration.

[0015] Some aspects of the present disclosure relate to a base station. The base station includes: a transceiver configured to communicate with a UE via a wireless network; and a processor communicatively coupled to the transceiver. The processor uses the transceiver to transmit a downlink message including a CSI report configuration to the UE. Additionally, the processor uses the transceiver to receive an uplink message including a plurality of CSI reports from the UE. The plurality of CSI reports includes at least an outdated CSI report based at least in part on CSI measurements performed before a current reference period and a current CSI report based at least in part on CSI measurements performed during the current reference period at least in part based on the CSI report configuration.

[0016] The present invention content is provided for the purpose of exemplifying some aspects only, so as to provide an understanding of the subject matter described herein. Therefore, the above features are only examples and should not be construed as narrowing the scope or essence of the subject matter in the present disclosure. Other features, aspects and advantages of the present disclosure will become apparent from the following detailed description, drawings and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings incorporated herein and forming a part of the specification illustrate the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the relevant art to make and use the present disclosure.

[0018] Figure 1 An exemplary wireless system for implementing a design for CSI reports including outdated channel state information (CSI) reports in accordance with some aspects of the present disclosure is shown.

[0019] Figure 2 An example for triggering a semi-persistent CSI reference signal for CSI reports in accordance with some aspects of the present disclosure is shown.

[0020] Figure 3 An exemplary CSI report table used in a CSI report including an outdated CSI report is shown in accordance with some aspects of the present disclosure.

[0021] Figure 4 An exemplary method of a system (e.g., a user equipment (UE)) for supporting a design for implementing a CSI report including an outdated CSI report is shown in accordance with some aspects of the present disclosure.

[0022] Figure 5 An exemplary method of a system (e.g., a base station) for supporting a design for implementing a CSI report including an outdated CSI report is shown in accordance with some aspects of the present disclosure.

[0023] Figure 6 A block diagram of an exemplary system of an electronic device implementing a design for a CSI report including an outdated CSI report is shown in accordance with some aspects of the present disclosure.

[0024] Figure 7 is an exemplary computer system for implementing some aspects or portions thereof of the disclosure provided herein.

[0025] The present disclosure is described with reference to the accompanying drawings. In the drawings, generally, the same reference numerals indicate the same or functionally similar elements. Additionally, generally, the leftmost digit of a reference numeral identifies the drawing in which the reference numeral first appears. Detailed Description

[0026] In a wireless system, channel state information (CSI) is a mechanism by which a user equipment (UE) measures the quality of various radio channels and reports the results to a network or a base station (e.g., an evolved Node B (eNB), a next-generation Node B (gNB), or other base stations). The base station may use the received CSI report included in an uplink message to adjust its transmission to the UE based on the channel characteristics reported by the UE. In some examples, the base station uses CSI report configuration to control the time and frequency resources that can be used by the UE to report CSI to the base station. The UE measures the channels and interference on the configured resources based on the CSI report configuration, generates an expected CSI report, and transmits the CSI report on the configured uplink channel at the correct time (by configuration and / or by triggering). Generally speaking, the CSI report configuration for CSI acquisition and reporting may mainly include three aspects: resource settings, report settings, and a list of report triggers. The report settings for CSI can be aperiodic, periodic, or semi-persistent.

[0027] For current or future high-performance wireless systems, CSI reporting may encounter various difficulties. The performance of current or future wireless communication systems may be more demanding than that of previous generations of mobile networks, requiring support for high data rates (e.g., 20 Gbps), extremely low latency (e.g., <1 millisecond), ultra-high reliability, energy efficiency, and an extremely large number of connected devices. For such wireless communication systems, for various reasons, a UE may not be able to process all CSI reports configured by a base station. For example, there may be a mismatch in CSI processing unit (CPU) rules between the network (NW) and the UE. A large number of CSI resources / ports may be configured that exceed the processing capacity of the UE. Due to various reasons such as heat, other carrier processing, or other difficulties and inefficiencies, there may be a temporary reduction in UE capabilities.

[0028] Current solutions to CSI reporting difficulties may be inadequate or inefficient. When a UE is unable to perform CSI reporting as configured by a base station, traditionally, some CSI reports configured to be provided by the UE are ignored. For example, when the size of the reported CSI is smaller than the size of the scheduled uplink control information (UCI), the CSI report is ignored. However, ignoring CSI reports configured to be provided may leave the base station without the required information, resulting in degraded communication between the UE and the base station. Additionally, current CSI report configurations determined by the base station may be inefficient. For example, semi-persistent CSI (SP-CSI) reporting can be activated by downlink control information (DCI). However, the SP-CSI reference signal (SP-CSI RS) required for SP-CSI reporting may need to be activated by another control signal (e.g., media access control (MAC) control element (MAC-CE)). The use of an additional control signal for the SP-CSI RS results in unnecessary overhead and increased latency.

[0029] Some aspects of the present disclosure provide improved solutions to CSI reporting difficulties encountered in current or future wireless systems. Specifically, apparatuses and methods are proposed for implementing CSI reporting for a wireless communication system that includes outdated CSI reports. Here, an outdated CSI report is at least partially based on CSI measurements performed before a current reference time period, while a current CSI report is based on measurements in the current reference time period. Instead of ignoring an outdated CSI report, the outdated CSI report can still provide some useful information for a base station to adjust its transmission to the UE. Transmitting an outdated CSI report may not increase the computational requirements of the CPU too much, thus meeting the computational constraints of the UE's CPU while providing specific guidance to the base station. When the UE is not in a fast-moving environment, the outdated CSI report may be substantially the same as the current CSI report.

[0030] According to some aspects, the UEs disclosed herein may operate in a wireless communication system based on the 3rd Generation Partnership Project (3GPP) Release 16 (Rel-16), Release 17 (Rel-17), or a New Radio (NR) multiple-input / multiple-output (MIMO) system with MIMO CSI reporting or further enhanced MIMO (FeMIMO) CSI reporting. MIMO is a core technology for such wireless systems, which creates multiple signal paths between a base station and a UE, each with different propagation characteristics. Accordingly, CSI measurements are collected for each potential signal path and further fed back by the UE for the base station to determine the best or desired signal path of the UE.

[0031] According to some aspects, the time and frequency resources to be used by a UE for CSI reporting may be indicated by a CSI reporting configuration included in a downlink message from a base station to the UE. According to some examples, the resources for CSI reporting, the CSI reporting configuration, and other settings may be set by the base station during a radio resource control (RRC) connection establishment procedure or activated by downlink control information (DCI).

[0032] Although some examples of CSI reporting configurations or the content of CSI reports are provided above, aspects of the present disclosure are not limited to these examples, and a CSI reporting configuration message may include fewer, more, or other parameters, instructions, and / or information.

[0033] Figure 1 An exemplary wireless system 100 is shown that implements a design for CSI reporting including outdated channel state information (CSI) reports according to some aspects of the present disclosure. Figure 2 An example for triggering a semi-persistent CSI reference signal for CSI reporting is shown according to some aspects of the present disclosure. Figure 3 An exemplary CSI reporting table used in CSI reporting including outdated CSI reports is shown according to some aspects of the present disclosure. The wireless system 100 is provided for illustrative purposes only and does not limit the disclosed aspects. The system 100 may include, but is not limited to, a network node (referred to herein as a base station) 101 and an electronic device (hereinafter referred to as a UE) 105.

[0034] According to some aspects, the base station 101 may include a node configured to operate based on a wide variety of wireless communication technologies such as, but not limited to, technologies based on 3GPP standards. For example, the base station 101 may include a node configured to operate using Rel-16, Rel-17, or later versions. The base station 101 may be a fixed station and may also be referred to as a base transceiver system (BTS), an access point (AP), a transmit / receive point (TRP), an evolved Node B (eNB), a next-generation Node B (gNB), or some other equivalent term.

[0035] According to some aspects, UE 105 may include an electronic device configured to operate based on a wide variety of wireless communication technologies. These technologies may include, but are not limited to, technologies based on Third Generation Partnership Project (3GPP) standards. For example, referring to Figure 1 , UE 105 may include an electronic device configured to operate using Release 16, Release 17, or later versions. UE 105 may include, but is not limited to: wireless communication devices, smart phones, laptop computers, desktop computers, tablet computers, personal assistants, monitors, televisions, wearable devices, Internet of Things (IoT), communication devices of vehicles, mobile stations, user stations, remote terminals, wireless terminals, user equipment, etc.

[0036] According to some aspects, base station 101 may use CSI report configuration to control the time and frequency resources that can be used by UE 105 to report CSI to base station 101. UE 105 measures the channels and interference on the configured resources based on the CSI report configuration, generates an expected CSI report, and transmits the CSI report on the configured uplink channel at the correct time (as specified by the configuration and / or trigger). Base station 101 may use the received CSI report included in the uplink message to adjust its transmission to UE 105 based on the channel characteristics reported by UE 105.

[0037] In some examples, UE 105 may include a transceiver configured to communicate wirelessly with base station 101 and a processor communicatively coupled to the transceiver, as Figure 6 and Figure 7 shown in more detail in. UE 105 may be connected to base station 101 using one or more communication links (e.g., downlink 103 and uplink 107) and may communicate with the base station. In a MIMO wireless system, there may be multiple signal paths between multiple antenna ports at base station 101 and UE 105, and downlink 103 and uplink 107 may be examples of any such signal paths between the antenna ports at base station 101 and UE 105. There are other multiple signal paths (not shown) between the antenna ports at base station 101 and UE 105.

[0038] In some examples, the UE 105 uses a transceiver to receive a downlink message 102 from the base station 101 that includes a CSI report configuration 104. The CSI report configuration 104 may include information about a list of resource settings, report settings, and report triggers used by the UE 105 for CSI reporting. Specifically, the CSI report configuration 104 includes a report setting 106, which may include an aperiodic (AP) setting, a periodic setting, or a semi-persistent (SP) setting. In some examples, the downlink message 102 may be an RRC message or signaling or DCI.

[0039] In some examples, when the report setting 106 includes a semi-persistent setting or an aperiodic setting, the downlink message 102 may be DCI for activating the semi-persistent setting or the aperiodic setting. As Figure 2 shown, at time t1, DCI 202 may be received via the downlink (e.g., downlink 103) to activate semi-persistent CSI (SP-CSI) reporting for the UE 105. At time t2, a semi-persistent CSI reference signal (SP-CSI RS) 232 may be activated (e.g., received via the downlink 103) to enable the UE 105 to perform CSI measurements in a semi-persistent manner. Additionally, at time t3, a CSI report may be transmitted to the base station 101 via the uplink 107 in a semi-persistent manner. The time difference between time t1 and time t2 may be a predetermined period of time from when the DCI is received. Thus, the SP-CSI RS 232 is activated after a predetermined period of time from time t1 when the DCI 202 is received.

[0040] In some examples, the activation time of the SP-CSI RS 232 may follow one of the following options. In one option, the SP-CSI RS 232 is activated immediately after the UE 105 sends back a HARQ-ACK message. In another option, the SP-CSI RS 232 is activated 3 milliseconds (ms) after the UE 105 sends back a HARQ-ACK message. In another option, the SP-CSI RS 232 is activated 3 ms + K ms after t1, where K may be determined by various factors. For example, K may be determined by the base station 101 and signaled to the UE 105. Additionally or alternatively, K may be based on the downlink physical downlink shared channel (PDSCH) processing capability of the UE 105 or the uplink PDSCH processing capability of the UE 105. In some examples, K may be hard-coded in the UE based on various processing capabilities of the UE 105.

[0041] DCI 202 for triggering SP-CSI reports is shown only as an example. In some examples, DCI 202 may trigger other CSI reports, e.g., AP-CSI reports. If AP-CSI requires SP-CSI RS, UE 105 may activate SP-CSI RS 232 at time t2. The activation time of the SP-CSI RS for AP-CSI reports may follow similar options as those for the SP-CSI RS for SP-CSI reports outlined above. In one option, SP-CSI RS 232 is activated immediately after UE 105 sends back a HARQ-ACK message. In another option, SP-CSI RS 232 is activated 3 milliseconds (ms) after UE 105 sends back a HARQ-ACK message. In another option, SP-CSI RS 232 is activated 3 ms + K ms after t1, where K may be determined by various factors. For example, K may be determined by base station 101 and signaled to UE 105. Additionally or alternatively, K may be based on the downlink PDSCH processing capability of UE 105 or the uplink PDSCH processing capability of UE 105. In some examples, K may be hard-coded in the UE based on various processing capabilities of UE 105.

[0042] In some examples, UE 105 performs CSI measurements 121 during a current reference period based on the received CSI report configuration 104 to obtain CSI measurements 121. Performing CSI measurements 121 may consume the CSI processing unit (CPU) power, CSI resources, or ports of UE 105. Additionally, UE 105 may also store CSI measurements (not shown) performed before the current reference period. The current reference period may be defined by downlink message 102, base station 101, or UE 105.

[0043] In some examples, CSI measurements 121 may include measurements of parameters selected from: CSI reference signal (CSI-RS) resource indicator (CRI), synchronization signal / physical broadcast channel (PBCH) block resource indicator (SSBRI), layer 1 reference signal received power (L1-RSRP), rank indicator (RI), precoding matrix indicator (PMI), layer indicator (LI), channel quality indicator (CQI), or signal-to-interference-plus-noise ratio (SINR). Additionally, the CSI measurements performed during the current reference period include measurements collected for each of the multiple signal paths between multiple antenna ports at the base station and the UE.

[0044] In some examples, the UE 105 generates one or more CSI reports, such as CSI report 123, based on various CSI measurements. In some examples, a CSI report, such as CSI report 123, may include multiple parts, where a part of the CSI report may include multiple groups. For example, CSI report 123 includes a first part 116 and a second part 117, where the second part 117 further includes group 0, group 1, and group 2. The first part 116 may be a type-I standard resolution report, while the second part 117 may be a type-II high resolution report. Additionally, the first part 116 and the second part 117 may be based on different measurements, different reference signals, or different codebooks.

[0045] In some examples, if CSI report 123 is generated at least in part based on CSI measurements performed before the current reference period, then the CSI report is an outdated CSI report. On the other hand, if CSI report 123 is generated based on CSI measurements 121 performed during the current reference period, then the CSI report is a current CSI report. Using an outdated CSI report can save the CPU power, CSI resources, or ports of the UE 105 at the current reference period, because the outdated CSI report uses such CSI measurements performed before the current reference period. In some examples, when the UE 105 is not in a fast-moving environment, the CSI measurements performed before the current reference period may be similar or substantially the same as the CSI measurements at the current reference period. Therefore, the data quality in the outdated CSI report may be similar or substantially the same as that in the current CSI report.

[0046] In some examples, an outdated CSI report may include a first part generated at least in part based on CSI measurements performed during the current reference period and a second part generated at least in part based on CSI measurements performed before the current reference period. In some examples, an outdated CSI report may include a certain group of the second part generated at least in part based on CSI measurements performed before the current reference period, while some other groups of the second part are generated at least in part based on CSI measurements performed during the current reference period.

[0047] In some examples, the UE 105 generates an uplink message 108 including one or more CSI reports, such as CSI report 123, and transmits the uplink message 108 to the base station 101. The transmission of the uplink message 108 may be based on the reporting settings 106 determined by the CSI report configuration 104. The uplink message 108 may be carried by a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).

[0048] In some examples, the uplink message 108 may also include an indicator for indicating that the CSI report has an outdated status (e.g., an outdated CSI report as referred to herein). When the uplink message 108 includes a current CSI report 113 and an outdated CSI report 111, the uplink message 108 may also include an indicator 112 for indicating that the outdated CSI report 111 has an outdated status and an indicator 114 for indicating that the current CSI report 113 has a current status.

[0049] In some examples, the uplink message 108 may include a CSI report table that includes an outdated CSI report, a current CSI report, and various indicators for indicating the status of the CSI report. As Figure 3 shown, the table 318 may be included in the uplink message 108. The table 318 includes two columns, namely, a column 317 for a plurality of CSI reports or portions or groups thereof and a column 319 for the status of the CSI report, its portion, or its group. In some examples, the column 319 may include a bit that has a value of 0 or 1 for indicating whether the corresponding CSI report is outdated or current. The table 318 includes n CSI reports. Each portion 1 of each of the n CSI reports has an indicator for the status of portion 1. Similarly, each group 0 of portion 2 of each of the n CSI reports also has an indicator for the status. Additionally, each of group 1 and group 2 of portion 2 of each of the n CSI reports has an indicator for the status. Figure 3 This is merely an example showing various CSI reports and their status as outdated or current. There may be other forms of tables for showing CSI reports and their status. The following Tables I and II further show different CSI tables that include CSI reports with their corresponding status.

[0050] Table I, Table II

[0051]

[0052] To further improve the transmission efficiency, not all portions of the non-outdated CSI report need to be included in the uplink message 108. Additionally, when there is a priority among multiple CSI reports, efficiency can be obtained when only one outdated CSI report is included in the uplink message 108.

[0053] In some examples, the uplink message 108 may include a first portion of the outdated CSI report that is at least partially generated based on CSI measurements 121 performed during the current reference period and a second portion of the outdated CSI report that is at least partially generated based on CSI measurements performed before the current reference period. Alternatively, the uplink message 108 includes a first portion of the outdated CSI report that is at least partially generated based on CSI measurements performed before the current reference period, and the second portion of the outdated CSI report is not included in the uplink message 108. Similarly, if the uplink message 108 includes an outdated CSI report with a portion 2 set 0 that is at least partially generated based on CSI measurements performed before the current reference period, the uplink message 108 may ignore CSI report portions 2 set 1 and 2.

[0054] In some examples, multiple CSI reports included in the uplink message 108 have relative priorities, and the outdated CSI report has the lowest priority among the multiple CSI reports included in the uplink message 108. Thus, the uplink message 108 includes only one outdated CSI report with the lowest priority. When there are multiple CSI reports, each CSI report may have a priority. When the UE 105 decides to skip CSI measurements and report an outdated CSI report, the UE may select the CSI report with the lowest priority as the outdated CSI report. In this way, the base station 101 knows that the UE 105 does not randomly send an outdated CSI report that may be important to the network. In some examples, the multiple CSI reports have relative priorities according to the following priority sequence: CSI reports including layer 1 reference signal received power (L1-RSRP) or signal-to-interference-plus-noise ratio (SINR) > CSI reports including other reportQuantity, where reportQuantity is configured as part of the CSI report configuration in RRC; and aperiodic (AP) CSI reports > semi-persistent (SP) CSI reports carried by the physical uplink shared channel (PUSCH) > semi-persistent (SP) CSI reports carried by the physical uplink control channel (PUCCH) > periodic CSI reports carried by the PUCCH, where the symbol ">" means "has a higher priority". The above priority sequence is only an example. Other types of priority sequences are possible for other examples.

[0055] In some examples, to complete the CSI report to base station 101, uplink message 108 can be carried by PUCCH or PUSCH. Currently, the standard document 3GPP TS 38.212 V16.2.0 (2020-06) (hereinafter referred to as TS 38.212) includes technical specifications for multiplexing and channel coding in the radio access network. Various mappings for CSI reports and UCI bit sequences for PUCCH or PUSCH are provided in TS 38.212, including Table 6.3.1.1.2-12, Table 6.3.1.1.2-13, and Table 6.3.1.1.2-14 or Table 6.3.2.1.2-6 and Table 6.3.2.1.2-7. As shown in the modified tables below, when allowing stale CSI reports, additional column bits shown in the "Stale CSI" column can be added to Table 6.3.1.1.2-12, Table 6.3.1.1.2-13, Table 6.3.1.1.2-14, Table 6.3.2.1.2-6, and Table 6.3.2.1.2-7 of TS 38.212 to indicate whether the corresponding CSI report is stale or current. For example, logic "0" can indicate that the corresponding CSI report is a stale CSI report, and logic "1" can indicate that the corresponding CSI report is a current CSI report.

[0056] Table 6.3.1.1.2-12: Mapping order of CSI report to UCI bit sequence a0, a1, a2, a3, ..., a A-1 , without Two-part CSI report

[0057]

[0058] Table 6.3.1.1.2-13: Mapping order of CSI report to UCI bit sequence , having two parts Report

[0059]

[0060] Table 6.3.1.1.2-14: Mapping order of CSI report to UCI bit sequence , having two parts Part CSI report

[0061]

[0062] Table 6.3.2.1.2-6: Mapping order of CSI report to UCI bit sequence , having two parts CSI report

[0063]

[0064] Table 6.3.2.1.2-7: Mapping order of CSI report to UCI bit sequence , having two parts Part CSI report

[0065]

[0066] Figure 4 An exemplary method 400 of a system (e.g., a UE) for supporting a design of a mechanism for implementing CSI reporting including stale CSI reports in accordance with some aspects of the present disclosure is shown. For convenience and not limitation, elements of Figure 1 , Figure 6 and Figure 7 will be described Figure 4 . Method 400 may represent operations of an electronic device (e.g., a UE 105 of Figure 1 ) for implementing a mechanism for implementing CSI reporting including stale CSI reports. Method 400 may also be performed by a system 600 of Figure 6 and / or a computer system 700 of Figure 7 . However, method 400 is not limited to the specific aspects depicted in those figures, and other systems may be used to perform the method, as will be understood by those skilled in the art. It should be understood that not all operations may be required, and these operations may not be performed in the same order as Figure 4 shown.

[0067] At 402, the UE receives a downlink message from a base station using a transceiver, the downlink message including a CSI report configuration. For example, UE 105 receives a downlink message 102 including a CSI report configuration 104 from base station 101 using a transceiver, as described for Figure 1 .

[0068] At 404, the UE performs CSI measurements during a current reference period based at least in part on the CSI report configuration. For example, UE 105 performs CSI measurements during a current reference period based at least in part on CSI report configuration 104 to obtain CSI measurements 121, as described for Figure 1 . For example, the CSI measurements include measurements of parameters selected from: CSI reference signal (CSI-RS) resource indicator (CRI), synchronization signal / physical broadcast channel (PBCH) block resource indicator (SSBRI), layer 1 reference signal received power (L1-RSRP), rank indicator (RI), precoding matrix indicator (PMI), layer indicator (LI), channel quality indicator (CQI), or signal-to-interference-plus-noise ratio (SINR).

[0069] At 406, the UE generates one or more CSI reports, where the one or more CSI reports include at least an outdated CSI report that is at least partially based on CSI measurements performed before the current reference period. For example, UE 105 generates one or more CSI reports, such as CSI report 111 and / or CSI report 113. CSI report 111 is an outdated CSI report that is at least partially based on CSI measurements performed before the current reference period, as described for Figure 1 as described.

[0070] At 408, the UE generates an uplink message that includes one or more CSI reports, where the uplink message also includes an indicator for indicating that the outdated CSI report has an outdated status. For example, UE 105 generates an uplink message 108 that includes one or more CSI reports (e.g., outdated CSI report 111 and current CSI report 113), as described for Figure 1 as described. Additionally, uplink message 108 includes an indicator 112 for indicating that outdated CSI report 113 has an outdated status and an indicator 114 for indicating that current CSI report 111 has a current status.

[0071] At 410, the UE transmits the uplink message to the base station using a transceiver under the reporting settings determined by the CSI report configuration. For example, UE 105 transmits uplink message 108 to base station 105 using a transceiver under reporting settings 106 determined by CSI report configuration 104, as described for Figure 1 as described.

[0072] Figure 5 FIG. shows an exemplary method 500 of a system (e.g., a base station) that supports a mechanism for implementing a design for CSI reporting that includes an outdated CSI report, according to some aspects of the present disclosure. For convenience and not limitation, reference may be made to the elements of Figure 1 , Figure 6 and Figure 7 to describe 5. Method 500 may represent the operations of an electronic device (e.g., the base station 101 of Figure 1 ) that implements a mechanism for implementing CSI reporting that includes an outdated CSI report. Method 500 may also be performed by the system 600 of Figure 6 and / or the computer system 700 of Figure 7 . However, method 500 is not limited to the specific aspects depicted in those figures, and other systems may be used to perform the method, as will be understood by those skilled in the art. It should be understood that not all operations may be required, and these operations may not be performed in the same order as shown in Figure 5 .

[0073] At 502, the base station transmits a downlink message including CSI report configuration to the UE using a transceiver. For example, base station 101 transmits downlink message 102 including CSI report configuration 104 to UE 105 using a transceiver, as described for Figure 1 as described.

[0074] At 504, the base station receives an uplink message including a plurality of CSI reports from the UE using a transceiver. The plurality of CSI reports includes at least an outdated CSI report at least partially based on CSI measurements performed before the current reference period and a current CSI report at least partially based on CSI measurements performed during the current reference period at least partially based on the CSI report configuration. The uplink message may further include a first indicator for indicating that the outdated CSI report has an outdated status and a second indicator for indicating that the current CSI report has a current status. For example, base station 101 receives uplink message 108 including a plurality of CSI reports (e.g., outdated CSI report 111 and current CSI report 113) from UE 105, as described for Figure 1 as described. In addition, uplink message 108 includes indicator 112 for indicating that outdated CSI report 113 has an outdated status and indicator 114 for indicating that current CSI report 111 has a current status.

[0075] Figure 6 FIG. shows a block diagram of an exemplary system 600 of an electronic device implementing a design for CSI reporting including an outdated CSI report according to some aspects of the present disclosure. System 600 may be any electronic device of system 100 (e.g., base station 101, UE 105). System 600 includes a processor 610, one or more transceivers 620, a communication infrastructure 640, a memory 650, an operating system 652, an application 654, and one or more antennas 660. The illustrated system is provided as an exemplary part of system 600, and system 600 may include other circuits and subsystems. Moreover, although the systems of system 600 are shown as separate components, aspects of the present disclosure may include any combination of these components, fewer components, or more components.

[0076] The memory 650 may include random access memory (RAM) and / or a cache, and may include control logic (e.g., computer software) and / or data. The memory 650 may include other storage devices or memories, such as but not limited to a hard disk drive and / or a removable storage device / unit. According to some examples, the operating system 652 may be stored in the memory 650. The operating system 652 may manage data transfer from the memory 650 and / or one or more application programs 654 to the processor 610 and / or one or more transceivers 620. In some examples, the operating system 652 maintains one or more network protocol stacks (e.g., Internet protocol stack and cellular protocol stack, etc.) that may include several logical layers. At the corresponding layer of the protocol stack, the operating system 652 includes control mechanisms and data structures to perform functions associated with that layer.

[0077] According to some examples, the application programs 654 may be stored in the memory 650. The application programs 654 may include applications used by the wireless system 600 and / or users of the wireless system 600 (e.g., user applications). The applications in the application programs 654 may include applications such as but not limited to Siri TM , FaceTime TM , broadcast streams, video streams, remote controls, and / or other user applications.

[0078] The system 600 may also include a communication infrastructure 640. The communication infrastructure 640 provides communication, for example, between the processor 610, one or more transceivers 620, and the memory 650. In some embodiments, the communication infrastructure 640 may be a bus. The processor 610, together with the instructions stored in the memory 650, performs operations that enable the system 600 to implement a mechanism for CSI reporting that includes outdated CSI reports, as described herein for the system 100 as Figure 1 shown.

[0079] One or more transceivers 620 transmit and receive communication signals that support mechanisms for CSI reporting, including legacy CSI reports. Additionally, one or more transceivers 620 transmit and receive communication signals that support mechanisms for measuring a communication link and generating and transmitting CSI reports. According to some aspects, one or more transceivers 620 may be coupled to an antenna 660. Antenna 660 may include one or more antennas that may be of the same or different types. One or more transceivers 620 allow system 600 to communicate with other devices that may be wired and / or wireless. In some examples, one or more transceivers 620 may include circuits / devices such as processors, controllers, radio components, sockets, plugs, buffers, etc. for connecting to a network and communicating thereon. According to some examples, one or more transceivers 620 include one or more circuits for connecting to and communicating on a wired and / or wireless network.

[0080] According to some aspects of the present disclosure, one or more transceivers 620 may include a cellular subsystem, a WLAN subsystem, and / or a Bluetooth TM subsystem, each including its own wireless transceiver and protocol, as would be understood by those skilled in the art based on the discussion provided herein. In some embodiments, one or more transceivers 620 may include more or fewer systems for communicating with other devices.

[0081] In some examples, one or more transceivers 620 may include one or more circuits (including a WLAN transceiver) to enable connection and communication over a WLAN network, such as but not limited to a network based on the standards described in IEEE 802.11.

[0082] Additionally or alternatively, one or more transceivers 620 may include one or more circuits (including a Bluetooth TM transceiver) to enable connection and communication based on, for example, the Bluetooth TM protocol, the Bluetooth TM low energy protocol, or the Bluetooth TM low energy remote protocol. For example, one or more transceivers 620 may include a Bluetooth TM transceiver.

[0083] Additionally, one or more transceivers 620 may include one or more circuits (including a cellular transceiver) for connecting to and communicating on a cellular network. The cellular network may include, but is not limited to, 3G / 4G / 5G networks, such as Universal Mobile Telecommunications System (UMTS), Long Term Evolution (LTE), etc. For example, one or more transceivers 220 may be configured to operate according to one or more of Rel-15, Rel-16, Rel-17, or later versions of the 3GPP standard.

[0084] According to some aspects of the present disclosure, the processor 610 implements the methods and mechanisms discussed in the present disclosure either alone or in combination with computer instructions stored in the memory 650 and / or one or more transceivers 620. For example, the processor 610 implements, either alone or in combination with computer instructions stored in the memory 650 and / or one or more transceivers 220, a mechanism for CSI reporting including an outdated CSI report. According to some aspects of the present disclosure, the processor 610 may, either alone or in combination with computer instructions stored in the memory 650 and / or one or more transceivers 620, receive a CSI report configuration message 104 from a base station (e.g., Figure 1 base station 101 as shown). The processor 610 uses the received CSI report configuration message 104 to perform CSI measurements via the transceiver 620 during a current reference period at least partially based on the CSI report configuration 104, and generate one or more CSI reports including at least an outdated CSI report (e.g., outdated CSI report 111). Additionally, the processor 610 may generate an uplink message 108 including one or more CSI reports, and transmit the uplink message 108 to the base station 101 using the transceiver 620 under a reporting setting 106 determined by the CSI report configuration 104.

[0085] Various aspects may be implemented, for example, using one or more computer systems such as Figure 7 the computer system 700 shown. The computer system 700 may be any known computer capable of performing the functions described herein, such as Figure 1 device 101, 105 as shown, or Figure 6600. The computer system 700 includes one or more processors (also known as central processing units or CPUs), such as processor 704. The processor 704 is connected to a communication infrastructure 706 (e.g., a bus). The computer system 700 also includes user input / output devices 703 that communicate with the communication infrastructure 706 via a user input / output interface 702, such as monitors, keyboards, pointing devices, etc. The computer system 700 also includes a main memory or primary storage 708, such as random access memory (RAM). The main memory 708 may include one or more levels of cache. The main memory 708 stores therein control logic (e.g., computer software) and / or data.

[0086] The computer system 700 may also include one or more secondary storage devices or memories 710. The secondary storage 710 may include, for example, a hard disk drive 712 and / or a removable storage device or drive 714. The removable storage drive 714 may be a floppy disk drive, a tape drive, an optical disk drive, an optical storage device, a tape backup device, and / or any other storage device / drive.

[0087] The removable storage drive 714 may interact with a removable storage unit 718. The removable storage unit 718 includes a computer-usable or readable storage device on which computer software (control logic) and / or data is stored. The removable storage unit 718 may be a floppy disk, a tape, an optical disk, a DVD, an optical storage disk, and / or any other computer data storage device. The removable storage drive 714 reads from and / or writes to the removable storage unit 718 in a well-known manner.

[0088] According to some aspects, the secondary storage 710 may include other means, tools, or other methods for allowing the computer system 700 to access computer programs and / or other instructions and / or data. Such means, tools, or other methods may include, for example, a removable storage unit 722 and an interface 720. Examples of the removable storage unit 722 and the interface 720 may include a program cartridge and a cartridge interface (such as those found in video game devices), a removable memory chip (such as an EPROM or PROM) and an associated socket, a storage stick and a USB port, a memory card and an associated memory card slot, and / or any other removable storage unit and associated interface.

[0089] In some examples, main memory 708, removable storage unit 718, and removable storage unit 722 may store instructions that, when executed by processor 704, cause processor 704 to perform operations for a UE (e.g., UE 105) or a base station (e.g., base station 101). In some examples, these operations include: receiving a downlink message from the base station that includes a CSI report configuration; performing CSI measurements during a current reference time period based at least in part on the CSI report configuration; generating a plurality of CSI reports that include at least an outdated CSI report based at least in part on CSI measurements performed prior to the current reference time period; generating an uplink message that includes the plurality of CSI reports; and transmitting the uplink message to the base station under a reporting setting determined by the CSI report configuration.

[0090] Computer system 700 may also include a communication or network interface 724. Communication interface 724 enables computer system 700 to communicate and interact with any combination of remote devices, remote networks, remote entities, etc. (collectively and individually referred to by reference numeral 728). For example, communication interface 724 may allow computer system 700 to communicate with remote device 728 via communication path 726, which may be wired and / or wireless and may include any combination of LAN, WAN, the Internet, etc. Control logic and / or data may be transmitted to and from computer system 700 via communication path 726.

[0091] The operations in the foregoing aspects can be implemented in a variety of configurations and architectures. Thus, some or all of the operations in the foregoing aspects may be performed in hardware, in software, or in both hardware and software. In some aspects, a tangible, non-transitory device or article includes a tangible, non-transitory computer-usable or readable medium having control logic (software) stored thereon, also referred to herein as a computer program product or a program storage device. This includes, but is not limited to, computer system 700, main memory 708, secondary memory 710, and removable storage units 718 and 722, as well as tangible articles embodying any combination of the foregoing. Such control logic, when executed by one or more data processing devices such as computer system 700, causes such data processing devices to operate as described herein.

[0092] Based on the teachings contained in this disclosure, it will be apparent to those skilled in the relevant art how to make and use aspects of this disclosure using data processing devices, computer systems, and / or computer architectures other than those Figure 7 shown. In particular, aspects may operate in conjunction with software, hardware, and / or operating system implementations other than those described herein.

[0093] It should be understood that the detailed description section, rather than the summary and abstract sections, is intended to be used to interpret the claims. The summary and abstract sections may set forth one or more but not all exemplary aspects of the disclosure as contemplated by the inventor, and are therefore not intended to limit the disclosure or the appended claims in any way.

[0094] Although the present disclosure has been described herein with reference to exemplary aspects of exemplary fields and applications, it should be understood that the present disclosure is not limited thereto. Other aspects and modifications are possible and within the scope and spirit of the present disclosure. For example, and without limiting the generality of this paragraph, aspects are not limited to the software, hardware, firmware, and / or entities shown in the figures and / or described herein. Further, aspects (whether or not explicitly described herein) have significant utility for fields and applications other than those described herein by way of example.

[0095] Aspects have been described herein by way of functional building blocks of specific implementations that illustrate specific functions and their relationships. For ease of description, the boundaries of these functional building blocks have been arbitrarily defined herein. Alternate boundaries may be defined so long as the specified functions and relationships (or their equivalents) are appropriately performed. Additionally, alternative aspects may perform functional blocks, steps, operations, methods, etc. in an order different from that described herein.

[0096] References herein to "one embodiment", "an embodiment", "exemplary embodiments", or similar phrases indicate that the described embodiment may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, such feature, structure, or characteristic is within the knowledge of one of ordinary skill in the relevant art to incorporate into other aspects whether or not explicitly recited or described herein.

[0097] The breadth and scope of the present disclosure should not be limited by any of the above-described exemplary aspects, but should be defined only in accordance with the following claims and their equivalents.

[0098] It is well known that the use of personally identifiable information should follow privacy policies and practices that are generally recognized as meeting or exceeding industry or government requirements for maintaining user privacy. Specifically, personally identifiable information data should be managed and processed to minimize the risk of inadvertent or unauthorized access or use, and the nature of authorized use should be clearly explained to the user.

[0099] For one or more embodiments or examples, at least one of the components shown in one or more of the foregoing figures may be configured to perform one or more operations, techniques, processes, and / or methods described in the example section below. For example, the circuitry associated with the UE, base station, network element, etc. described above in connection with one or more of the foregoing figures may be configured to operate in accordance with one or more of the embodiments shown in the exemplary section below.

[0100] Embodiment

[0101] Embodiment 1 includes a user equipment (UE) comprising: a transceiver configured to wirelessly communicate with a base station; and a processor communicatively coupled to the transceiver and configured to: use the transceiver and receive a downlink message from the base station that includes a channel state information (CSI) report configuration; perform CSI measurements during a current reference period based at least in part on the CSI report configuration; generate one or more CSI reports, wherein the one or more CSI reports include at least an outdated CSI report based at least in part on CSI measurements performed prior to the current reference period; generate an uplink message that includes the one or more CSI reports; and transmit the uplink message to the base station using the transceiver under a reporting setting determined by the CSI report configuration.

[0102] Embodiment 2 includes the UE according to Embodiment 1 and / or some other embodiment herein, wherein the uplink message further includes an indicator for indicating that the outdated CSI report has an outdated status.

[0103] Embodiment 3 includes the UE according to Embodiment 2 and / or some other embodiment herein, wherein the indicator is a first indicator, and wherein the one or more CSI reports further include a current CSI report generated based at least in part on CSI measurements performed during the current reference period, and wherein the uplink message further includes a second indicator for indicating that the current CSI report has a current status.

[0104] Embodiment 4 includes the UE according to Embodiment 3 and / or some other embodiment herein, wherein the uplink message includes a CSI report table that includes the outdated CSI report, the first indicator, the current CSI report, and the second indicator.

[0105] Embodiment 5 includes the UE according to Embodiment 1 and / or some other embodiment herein, wherein the uplink message is carried by a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).

[0106] Example 6 includes a UE according to Example 1 and / or some other example herein, wherein the CSI measurements performed during the current reference time period include measurements of parameters selected from: CSI reference signal (CSI-RS) resource indicator (CRI), synchronization signal / physical broadcast channel (PBCH) block resource indicator (SSBRI), layer 1 reference signal received power (L1-RSRP), rank indicator (RI), precoding matrix indicator (PMI), layer indicator (LI), channel quality indicator (CQI), or signal-to-interference-plus-noise ratio (SINR).

[0107] Example 7 includes a UE according to Example 1 and / or some other example herein, wherein the CSI measurements performed during the current reference time period include measurements collected for each of a plurality of signal paths between a plurality of antenna ports at the base station and the UE.

[0108] Example 8 includes a UE according to Example 1 and / or some other example herein, wherein the one or more CSI reports included in the uplink message have relative priorities, and the outdated CSI report has the lowest priority among the one or more CSI reports.

[0109] Example 9 includes a UE according to Example 1 and / or some other example herein, wherein the uplink message includes a first part of the outdated CSI report generated at least partially based on the CSI measurements performed during the current reference time period and a second part of the outdated CSI report generated at least partially based on the CSI measurements performed before the current reference time period, wherein the outdated CSI report includes the first part and the second part; or wherein the uplink message includes the first part of the outdated CSI report generated at least partially based on the CSI measurements performed before the current reference time period, and the second part of the outdated CSI report is not included in the uplink message.

[0110] Example 10 includes a UE according to Example 1 and / or some other example herein, wherein the reporting setting includes an aperiodic setting, a periodic setting, or a semi-persistent setting.

[0111] Example 11 includes a UE according to Example 1 and / or some other example herein, wherein the reporting setting includes a semi-persistent setting or an aperiodic setting activated by downlink control information (DCI), and wherein the DCI further activates a semi-persistent CSI reference signal to perform the CSI measurements in a semi-persistent or aperiodic manner.

[0112] Embodiment 12 includes a UE according to Embodiment 11 and / or some other embodiment herein, wherein the semi-persistent CSI reference signal is activated after a predetermined time period from when the DCI is received.

[0113] Embodiment 13 includes a method for a user equipment (UE), comprising: receiving, by the UE and from a base station, a downlink message including a channel state information (CSI) report configuration; generating a plurality of CSI reports, wherein the plurality of CSI reports at least includes an outdated CSI report at least partially based on CSI measurements performed before a current reference time period and a current CSI report at least partially based on CSI measurements performed during the current reference time period and at least partially based on the CSI report configuration; generating an uplink message including the plurality of CSI reports; and transmitting the uplink message to the base station under a reporting setting determined by the CSI report configuration.

[0114] Embodiment 14 includes the method according to Embodiment 13 and / or some other embodiment herein, wherein the uplink message further includes a first indicator for indicating that the outdated CSI report has an outdated status and a second indicator for indicating that the current CSI report has a current status.

[0115] Embodiment 15 includes the method according to Embodiment 14 and / or some other embodiment herein, wherein the uplink message includes a CSI report table, and the CSI report table includes the outdated CSI report, the first indicator, the current CSI report, and the second indicator.

[0116] Embodiment 16 includes the method according to Embodiment 13 and / or some other embodiment herein, wherein the plurality of CSI reports included in the uplink message have relative priorities, and the outdated CSI report has the lowest priority among the plurality of CSI reports.

[0117] Embodiment 17 includes a non-transitory computer-readable medium storing instructions that, when executed by a processor of a user equipment (UE), cause the UE to perform operations, the operations including: receiving from a base station a downlink message including a channel state information (CSI) report configuration; performing CSI measurements during a current reference time period at least partially based on the CSI report configuration; generating a plurality of CSI reports, wherein the plurality of CSI reports at least includes an outdated CSI report at least partially based on CSI measurements performed before the current reference time period and a current CSI report at least partially based on the CSI measurements performed during the current reference time period; generating an uplink message including the plurality of CSI reports; and transmitting the uplink message to the base station under a reporting setting determined by the CSI report configuration.

[0118] Example 18 includes a non-transitory computer-readable medium according to Example 17 and / or some other embodiment herein, wherein the plurality of CSI reports included in the uplink message have relative priorities according to the following priority sequence: CSI reports including layer 1 reference signal received power (L1-RSRP) or signal-to-interference-plus-noise ratio (SINR) > CSI reports including other reportQuantities, where reportQuantity is configured as part of a CSI report configuration in RRC; and aperiodic (AP) CSI reports > semi-persistent (SP) CSI reports carried by a physical uplink shared channel (PUSCH) > semi-persistent (SP) CSI reports carried by a physical uplink control channel (PUCCH) > periodic CSI reports carried by the PUCCH; where the symbol ">" means "has a higher priority".

[0119] Example 19 includes a non-transitory computer-readable medium according to Example 17 and / or some other embodiment herein, wherein the outdated CSI report includes a first part and a second part, wherein the second part includes a plurality of groups, and wherein the groups in the plurality of groups of the first part or the second part are generated at least in part based on the CSI measurements performed before the current reference period.

[0120] Example 20 includes a non-transitory computer-readable medium according to Example 17 and / or some other embodiment herein, wherein the uplink message further includes a first indicator represented by one or more bits to indicate that the outdated CSI report has an outdated status and a second indicator represented by one or more bits to indicate that the current CSI report has a current status.

[0121] Example 21 includes a base station, comprising: a transceiver configured to communicate with a user equipment (UE); and a processor communicatively coupled to the transceiver and configured to: use the transceiver and transmit a downlink message including a channel state information (CSI) report configuration to the UE; and use the transceiver and receive an uplink message from the UE, wherein the plurality of CSI reports included in the uplink message include at least an outdated CSI report at least in part based on CSI measurements performed before the current reference period and a current CSI report at least in part based on CSI measurements performed during the current reference period at least in part based on the CSI report configuration.

[0122] Example 22 includes a base station according to Example 21 and / or some other example herein, wherein the uplink message further includes a first indicator for indicating that the outdated CSI report has an outdated status and a second indicator for indicating that the current CSI report has a current status.

[0123] Example 23 includes a base station according to Example 21 and / or some other example herein, wherein the CSI measurements performed during the current reference period include measurements of parameters selected from: CSI reference signal (CSI-RS) resource indicator (CRI), synchronization signal / physical broadcast channel (PBCH) block resource indicator (SSBRI), layer 1 reference signal received power (L1-RSRP), rank indicator (RI), precoding matrix indicator (PMI), layer indicator (LI), channel quality indicator (CQI), or signal-to-interference-plus-noise ratio (SINR).

Claims

1. A user equipment (UE) comprising: a transceiver configured to wirelessly communicate with a base station; and a processor communicatively coupled to the transceiver and configured to: use the transceiver to receive a downlink message from the base station including a channel state information (CSI) report configuration; perform CSI measurements during a current reference period at least in part based on the CSI report configuration; generate one or more CSI reports, wherein a CSI report among the one or more CSI reports includes at least a first part and a second part, the first part being a type-I standard resolution report, and the second part being a type-II high resolution report, the first part being generated at least in part based on the CSI measurements performed during the current reference period, and the second part including at least an outdated CSI report generated at least in part based on CSI measurements performed before the current reference period; generate an uplink message including the one or more CSI reports; and use the transceiver to transmit the uplink message to the base station under a report setting determined by the CSI report configuration.

2. The UE according to claim 1, wherein the uplink message further includes an indicator for indicating that the outdated CSI report has an outdated state.

3. The UE according to claim 2, wherein the indicator is a first indicator, and wherein the one or more CSI reports further include a current CSI report generated at least in part based on the CSI measurements performed during the current reference period, and wherein the uplink message further includes a second indicator for indicating that the current CSI report has a current state.

4. The UE according to claim 3, wherein the uplink message includes a CSI report table, the CSI report table including the outdated CSI report, the first indicator, the current CSI report, and the second indicator.

5. The UE according to claim 1, wherein the uplink message is carried by a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).

6. The UE according to claim 1, wherein the CSI measurements performed during the current reference period include measurements of parameters selected from: a CSI reference signal (CSI-RS) resource indicator (CRI), a synchronization signal / physical broadcast channel (PBCH) block resource indicator (SSBRI), a layer 1 reference signal received power (L1-RSRP), a rank indicator (RI), a precoding matrix indicator (PMI), a layer indicator (LI), a channel quality indicator (CQI), or a signal-to-interference-plus-noise ratio (SINR).

7. The UE according to claim 1, wherein the CSI measurements performed during the current reference period include measurements collected for each of a plurality of signal paths between a plurality of antenna ports at the base station and the UE.

8. The UE according to claim 1, wherein the one or more CSI reports included in the uplink message have relative priorities, and the outdated CSI report has the lowest priority among the one or more CSI reports.

9. The UE according to claim 1, wherein the reporting setting includes an aperiodic setting, a periodic setting, or a semi-persistent setting.

10. The UE according to claim 1, wherein the reporting setting includes a semi-persistent setting or an aperiodic setting activated by downlink control information (DCI), and wherein the DCI further activates a semi-persistent CSI reference signal to perform the CSI measurement in a semi-persistent or aperiodic manner.

11. The UE according to claim 10, wherein the semi-persistent CSI reference signal is activated after a predetermined time period from the reception of the DCI.

12. A method for a user equipment (UE), comprising: receiving, by the UE and from a base station, a downlink message including a channel state information (CSI) report configuration; generating a plurality of CSI reports, wherein the CSI reports in the plurality of CSI reports at least include a first part and a second part, the first part is a type-I standard resolution report, and the second part is a type-II high-resolution report, the first part is at least partially generated based on the CSI measurement performed during a current reference period, and the second part at least includes an outdated CSI report at least partially generated based on the CSI measurement performed before the current reference period; generating an uplink message including the plurality of CSI reports; and transmitting the uplink message to the base station under a reporting setting determined by the CSI report configuration.

13. The method according to claim 12, wherein the uplink message further includes a first indicator for indicating that the outdated CSI report has an outdated state and a second indicator for indicating that the current CSI report has a current state.

14. The method according to claim 13, wherein the uplink message includes a CSI report table, and the CSI report table includes the outdated CSI report, the first indicator, the current CSI report, and the second indicator.

15. The method according to claim 12, wherein the plurality of CSI reports included in the uplink message have relative priorities, and the outdated CSI report has the lowest priority among the plurality of CSI reports.

16. A non-transitory computer-readable medium storing instructions that, when executed by a processor of a user equipment (UE), cause the UE to perform operations, the operations including: receiving from a base station a downlink message including a channel state information (CSI) report configuration; performing a CSI measurement during a current reference period at least partially based on the CSI report configuration; Generate a plurality of CSI reports, wherein a CSI report among the plurality of CSI reports includes at least a first part and a second part, the first part is a type-I standard resolution report, and the second part is a type-II high resolution report, the first part is generated at least in part based on the CSI measurements performed during the current reference time period, and the second part includes at least an outdated CSI report generated at least in part based on the CSI measurements performed before the current reference time period; Generate an uplink message including the plurality of CSI reports; and Transmit the uplink message to the base station under a reporting setting determined by the CSI report configuration.

17. The non-transitory computer-readable medium according to claim 16, wherein the plurality of CSI reports included in the uplink message have relative priorities according to the following priority sequence: A CSI report including layer 1 reference signal received power (L1-RSRP) or signal-to-interference-plus-noise ratio (SINR) > A CSI report including other reportQuantity, wherein reportQuantity is configured as part of the CSI report configuration in radio resource control (RRC); and Aperiodic (AP) CSI report > A semi-persistent (SP) CSI report carried by a physical uplink shared channel (PUSCH) > A semi-persistent (SP) CSI report carried by a physical uplink control channel (PUCCH) > A periodic CSI report carried by a PUCCH; wherein the symbol ">" means "has a higher priority".

18. The non-transitory computer-readable medium according to claim 16, wherein the outdated CSI report includes a first part and a second part, wherein the second part includes a plurality of groups, and wherein a group among the plurality of groups of the first part or the second part is generated at least in part based on the CSI measurements performed before the current reference time period.

19. The non-transitory computer-readable medium according to claim 16, wherein the uplink message further includes a first indicator represented by one or more bits to indicate that the outdated CSI report has an outdated status and a second indicator represented by one or more bits to indicate that the current CSI report has a current status.

20. A base station, comprising: A transceiver configured to communicate with a user equipment (UE); and A processor communicatively coupled to the transceiver and configured to: Use the transceiver and transmit a downlink message including a channel state information (CSI) report configuration to the UE; and Use the transceiver and receive an uplink message from the UE that includes a plurality of CSI reports, where the CSI reports in the plurality of CSI reports at least include a first part and a second part, the first part is a type-I standard resolution report, and the second part is a type-II high-resolution report, the first part is at least partially generated based on the CSI measurements performed during the current reference period, and the second part at least includes an outdated CSI report that is at least partially generated based on the CSI measurements performed before the current reference period.

21. The base station according to claim 20, wherein the uplink message further includes a first indicator for indicating that the outdated CSI report has an outdated status and a second indicator for indicating that the current CSI report has a current status.

22. The base station according to claim 20, wherein the CSI measurements performed during the current reference period include measurements of parameters selected from the following: CSI reference signal (CSI-RS) resource indicator (CRI), synchronization signal / physical broadcast channel (PBCH) block resource indicator (SSBRI), layer 1 reference signal received power (L1-RSRP), rank indicator (RI), precoding matrix indicator (PMI), layer indicator (LI), channel quality indicator (CQI), or signal-to-interference-plus-noise ratio (SINR).

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