Methods and apparatus related to channel state information reporting

Abstract

A technique includes sending one or more messages from a wireless access node to a user equipment, the one or more messages causing the user equipment to prepare to report channel state information in accordance with a plurality of channel state information reporting configurations, where the plurality of reporting configurations include at least a first reporting configuration for which channel state information is reported by the user equipment and a second reporting configuration for which channel state information is reported by the user equipment. The channel state information reporting by the user equipment depends on the triggered transmission to the user equipment; and sending a trigger transmission to the user equipment, where the trigger transmission triggers the user equipment to interrupt reporting the channel state information according to the second reporting configuration and instead reporting the channel state information according to the first reporting configuration.

Description

Technical Field

[0001] Various example embodiments relate to apparatus, methods and computer programs, and in particular, but not limited to, apparatus, methods and computer programs relating to channel state information reporting. Background Art

[0002] Channel state information (CSI) reporting by a user equipment (UE) may involve a radio access node preparing the UE to report channel state information according to a plurality of reporting configurations, including one or more reporting configurations whose CSI reporting is dependent on a triggered transmission to the UE. Summary of the invention

[0003] A method comprises: sending one or more messages from a wireless access node to a user equipment, wherein the sending of the one or more messages prepares the user equipment to report channel state information according to a plurality of channel state information reporting configurations, wherein the plurality of reporting configurations include at least a first reporting configuration and a second reporting configuration, and for the first reporting configuration, the channel state information reporting by the user equipment depends on a triggered transmission to the user equipment; and sending a triggered transmission to the user equipment, wherein the triggered transmission triggers the user equipment to interrupt reporting the channel state information according to the second reporting configuration and instead report the channel state information according to the first reporting configuration.

[0004] Preparing the user equipment may include providing an indicator to the user equipment that links the first reporting configuration to the second reporting configuration, wherein the indicator configures the user equipment to interrupt reporting the channel state information according to the second reporting configuration during one or more time intervals when the user equipment is triggered to report the channel state information according to the first reporting configuration.

[0005] Preparing the user equipment may include configuring the user equipment to follow a priority rule, according to which, in response to determining that a reference signal resource for the second reporting configuration overlaps with a reference signal resource for the first reporting configuration, the user equipment avoids reporting channel state information according to the second reporting configuration.

[0006] The second reporting configuration may be a default configuration, and the user equipment reports the channel state information according to the default configuration in one or more time slots in which the user equipment is not triggered to report the channel state information according to the first reporting configuration.

[0007] The first reporting configuration may be an aperiodic type reporting configuration, and the second reporting configuration may be a periodic type reporting configuration or a semi-persistent type reporting configuration.

[0008] The triggered transmission may trigger the user equipment to ignore at least one reference signal resource associated with the second reporting configuration, and the user equipment reports the channel state information according to the first reporting configuration.

[0009] Compared to the reference signal resources used for the second reporting configuration, the reference signal resources used for the first reporting configuration may have one or more of the following characteristics: a reduced number of antenna ports; and / or reduced time-frequency resources; and / or reduced transmission power.

[0010] The method may include: within one or more time intervals in which a triggered transmission triggers a user equipment to report channel state information according to a first reporting configuration, interrupting the transmission of a reference signal according to at least one reference signal resource associated with a second reporting configuration, and instead sending a reference signal according to at least one reference signal resource associated with the first reporting configuration.

[0011] A method comprises: receiving, at a user equipment, one or more messages from a wireless access node, the one or more messages preparing the user equipment to report channel state information according to a plurality of reporting configurations, wherein the plurality of reporting configurations comprises at least a first reporting configuration and a second reporting configuration, for which the channel state information reporting by the user equipment depends on a trigger transmission to the user equipment; and receiving a trigger transmission at the user equipment, wherein the trigger transmission triggers the user equipment to interrupt reporting the channel state information according to the second reporting configuration and to report the channel state information according to the first reporting configuration instead.

[0012] The one or more messages may include an indicator linking the first reporting configuration to the second reporting configuration, wherein the indicator configures the user equipment to interrupt reporting the channel state information according to the second reporting configuration during one or more time intervals in which the user equipment is triggered to report the channel state information according to the first reporting configuration.

[0013] The one or more messages may configure the user equipment to follow a priority rule, according to which, in response to determining that a reference signal resource for a second reporting configuration overlaps with a reference signal resource for a first reporting configuration, the user equipment avoids reporting channel state information according to the second reporting configuration.

[0014] The second reporting configuration may be a default reporting configuration, and the user equipment reports the channel state information according to the default reporting configuration in one or more time slots in which the user equipment is not triggered to report the channel state information according to the first reporting configuration.

[0015] The first reporting configuration may be an aperiodic type reporting configuration, and the second reporting configuration may be a periodic type reporting configuration or a semi-persistent type reporting configuration.

[0016] The triggered transmission may trigger the user equipment to ignore at least one reference signal resource associated with the second reporting configuration during a time slot in which the user equipment reports channel state information according to the first reporting configuration.

[0017] Compared to the reference signal resources used for the second reporting configuration, the reference signal resources used for the first reporting configuration may have one or more of the following characteristics: a reduced number of antenna ports; and / or reduced time-frequency resources; and / or reduced transmission power.

[0018] A wireless access node comprises: a component for sending one or more messages to a user equipment, wherein the one or more messages prepare the user equipment to report channel state information according to multiple channel state information reporting configurations, wherein the multiple reporting configurations include at least a first reporting configuration and a second reporting configuration, and for the first reporting configuration, the channel state information reporting performed by the user equipment depends on a triggered transmission to the user equipment; and a component for sending a triggered transmission to the user equipment, wherein the triggered transmission triggers the user equipment to interrupt reporting the channel state information according to the second reporting configuration and instead report the channel state information according to the first reporting configuration.

[0019] The one or more messages may include an indicator linking the first reporting configuration to the second reporting configuration, wherein the indicator configures the user equipment to interrupt reporting the channel state information according to the second reporting configuration during one or more time intervals when the user equipment is triggered to report the channel state information according to the first reporting configuration.

[0020] The one or more messages may configure the user equipment to follow a priority rule, according to which, in response to determining that a reference signal resource for a second reporting configuration overlaps with a reference signal resource for a first reporting configuration, the user equipment avoids reporting channel state information according to the second reporting configuration.

[0021] The second reporting configuration may be a default configuration, and the user equipment reports the channel state information according to the default configuration in one or more time slots in which the user equipment is not triggered to report the channel state information according to the first reporting configuration.

[0022] The first reporting configuration may be an aperiodic type reporting configuration, and the second reporting configuration may be a periodic type reporting configuration or a semi-persistent type reporting configuration.

[0023] The triggered transmission may trigger the user equipment to ignore at least one reference signal resource associated with the second reporting configuration, and the user equipment reports the channel state information according to the first reporting configuration.

[0024] Compared to the reference signal resources used for the second reporting configuration, the reference signal resources used for the first reporting configuration may have one or more of the following characteristics: a reduced number of antenna ports; and / or reduced time-frequency resources; and / or reduced transmission power.

[0025] The wireless access node may include: a component for interrupting the transmission of a reference signal according to at least one reference signal resource associated with a second reporting configuration, and instead sending a reference signal according to at least one reference signal resource associated with the first reporting configuration within one or more time intervals that trigger the transmission of a user equipment to report channel state information according to a first reporting configuration.

[0026] A user equipment comprises: a component for receiving one or more messages from a wireless access node, the one or more messages preparing the user equipment to report channel state information according to multiple reporting configurations, wherein the multiple reporting configurations include at least a first reporting configuration and a second reporting configuration, for which the channel state information reporting performed by the user equipment depends on a triggered transmission to the user equipment; and a component for receiving a triggered transmission, wherein the triggered transmission triggers the user equipment to interrupt reporting the channel state information according to the second reporting configuration and instead report the channel state information according to the first reporting configuration.

[0027] The one or more messages may include an indicator linking the first reporting configuration to the second reporting configuration, wherein the indicator configures the user equipment to: interrupt reporting channel state information according to the second reporting configuration during one or more time intervals when the user equipment is triggered to report channel state information according to the first reporting configuration.

[0028] The one or more messages may configure the user equipment to follow a priority rule, according to which, in response to determining that a reference signal resource for a second reporting configuration overlaps with a reference signal resource for a first reporting configuration, the user equipment avoids reporting channel state information according to the second reporting configuration.

[0029] The second reporting configuration may be a default reporting configuration, and in one or more time slots in which the user equipment is not triggered to report the channel state information according to the first reporting configuration, the user equipment reports the channel state information according to the default reporting configuration.

[0030] The first reporting configuration may be an aperiodic type reporting configuration, and the second reporting configuration may be a periodic type reporting configuration or a semi-persistent type reporting configuration.

[0031] The triggered transmission may trigger the user equipment to ignore at least one reference signal resource associated with the second reporting configuration during a time slot in which the user equipment reports channel state information according to the first reporting configuration.

[0032] Compared to the reference signal resources used for the second reporting configuration, the reference signal resources used for the first reporting configuration may have one or more of the following characteristics: a reduced number of antenna ports; and / or reduced time-frequency resources; and / or reduced transmission power.

[0033] A wireless access node comprises: at least one processor; and at least one memory comprising computer program code, wherein the at least one memory and the computer program code are configured to, together with the at least one processor, cause the wireless access node to execute: sending one or more messages to a user equipment, wherein the one or more messages cause the user equipment to prepare to report channel state information according to a plurality of channel state information reporting configurations, wherein the plurality of reporting configurations include at least a first reporting configuration and a second reporting configuration, and for the first reporting configuration, the channel state information reporting performed by the user equipment depends on a trigger transmission to the user equipment; and sending a trigger transmission to the user equipment, wherein the trigger transmission triggers the user equipment to interrupt reporting the channel state information according to the second reporting configuration and instead report the channel state information according to the first reporting configuration.

[0034] The one or more messages may include an indicator linking the first reporting configuration to the second reporting configuration, wherein the indicator configures the user equipment to interrupt reporting the channel state information according to the second reporting configuration during one or more time intervals when the user equipment is triggered to report the channel state information according to the first reporting configuration.

[0035] The one or more messages may configure the user equipment to follow a priority rule, according to which, in response to determining that a reference signal resource configured with the second report overlaps with a reference signal resource configured with the first report, the user equipment avoids reporting channel state information according to the second reporting configuration.

[0036] The second reporting configuration may be a default configuration, and the user equipment reports the channel state information according to the default configuration in one or more time slots in which the user equipment is not triggered to report the channel state information according to the first reporting configuration.

[0037] The first reporting configuration may be an aperiodic type reporting configuration, and the second reporting configuration may be a periodic type reporting configuration or a semi-persistent type reporting configuration.

[0038] The triggered transmission may trigger the user equipment to ignore at least one reference signal resource associated with the second reporting configuration, and the user equipment reports the channel state information according to the first reporting configuration.

[0039] Compared to the reference signal resources used for the second reporting configuration, the reference signal resources used for the first reporting configuration may have one or more of the following characteristics: a reduced number of antenna ports; and / or reduced time-frequency resources; and / or reduced transmission power.

[0040] The at least one memory and the computer program code may be configured to, together with the at least one processor, cause the wireless access node to: interrupt transmission of a reference signal according to at least one reference signal resource associated with a second reporting configuration, and instead send a reference signal according to at least one reference signal resource associated with the first reporting configuration, within one or more time intervals in which a triggered transmission triggers the user equipment to report channel state information according to a first reporting configuration.

[0041] A user equipment comprises: at least one processor; and at least one memory comprising computer program code, wherein the at least one memory and the computer program code are configured to, together with the at least one processor, use the user equipment to perform: receiving one or more messages from a wireless access node, the one or more messages enabling the user equipment to prepare to report channel state information according to a plurality of reporting configurations, wherein the plurality of reporting configurations at least include a first reporting configuration and a second reporting configuration, and for the first reporting configuration, the channel state information reporting performed by the user equipment depends on a trigger transmission to the user equipment; and receiving a trigger transmission, wherein the trigger transmission triggers the user equipment to interrupt reporting the channel state information according to the second reporting configuration and to report the channel state information according to the first reporting configuration instead.

[0042] The one or more messages may include an indicator linking the first reporting configuration to the second reporting configuration, wherein the indicator configures the user equipment to interrupt reporting the channel state information according to the second reporting configuration during one or more time intervals when the user equipment is triggered to report the channel state information according to the first reporting configuration.

[0043] The one or more messages may configure the user equipment to follow a priority rule, according to which, in response to determining that a reference signal resource for a second reporting configuration overlaps with a reference signal resource for a first reporting configuration, the user equipment avoids reporting channel state information according to the second reporting configuration.

[0044] The second reporting configuration may be a default reporting configuration, and the user equipment reports the channel state information according to the default reporting configuration in one or more time slots in which the user equipment is not triggered to report the channel state information according to the first reporting configuration.

[0045] The first reporting configuration may be an aperiodic type reporting configuration, and the second reporting configuration may be a periodic type reporting configuration or a semi-persistent type reporting configuration.

[0046] The triggered transmission may trigger the user equipment to ignore at least one reference signal resource associated with the second reporting configuration during a time slot in which the user equipment reports channel state information according to the first reporting configuration.

[0047] Compared to the reference signal resources used for the second reporting configuration, the reference signal resources used for the first reporting configuration may have one or more of the following characteristics: a reduced number of antenna ports; and / or reduced time-frequency resources; and / or reduced transmission power.

[0048] A wireless access node comprises: a transmitting circuit system for sending one or more messages to a user equipment, the one or more messages causing the user equipment to prepare to report channel state information according to a plurality of channel state information reporting configurations, wherein the plurality of reporting configurations include at least a first reporting configuration and a second reporting configuration, for which the channel state information reporting by the user equipment depends on a triggered transmission to the user equipment; and a transmitting circuit system for sending a triggered transmission to the user equipment, wherein the triggered transmission triggers the user equipment to interrupt reporting the channel state information according to the second reporting configuration and instead report the channel state information according to the first reporting configuration.

[0049] A user equipment comprises: a circuit system for receiving one or more messages received from a wireless access node, the one or more messages preparing the user equipment to report channel state information according to multiple reporting configurations, wherein the multiple reporting configurations include at least a first reporting configuration and a second reporting configuration, and for the first reporting configuration, the channel state information reporting performed by the user equipment depends on a triggered transmission to the user equipment; and a receiving circuit system for receiving a triggered transmission, wherein the triggered transmission triggers the user equipment to interrupt reporting the channel state information according to the second reporting configuration and instead report the channel state information according to the first reporting configuration.

[0050] A computer-readable medium includes program instructions stored thereon, the program instructions being used to execute: sending one or more messages from a wireless access node to a user equipment, the one or more messages causing the user equipment to prepare to report channel state information according to a plurality of channel state information reporting configurations, wherein the plurality of reporting configurations include at least a first reporting configuration and a second reporting configuration, for which the channel state information reporting by the user equipment depends on a trigger transmission to the user equipment; and sending a trigger transmission to the user equipment, wherein the trigger transmission triggers the user equipment to interrupt reporting the channel state information according to the second reporting configuration and instead report the channel state information according to the first reporting configuration.

[0051] A computer-readable medium includes program instructions stored thereon, the program instructions being used to execute: receiving one or more messages from a wireless access node at a user equipment, the one or more messages preparing the user equipment to report channel state information according to a plurality of reporting configurations, wherein the plurality of reporting configurations include at least a first reporting configuration and a second reporting configuration, for which the channel state information reporting by the user equipment depends on a trigger transmission to the user equipment; and receiving a trigger transmission at the user equipment, wherein the trigger transmission triggers the user equipment to interrupt reporting the channel state information according to the second reporting configuration and instead report the channel state information according to the first reporting configuration.

[0052] A non-transitory computer-readable medium includes program instructions stored thereon, the program instructions being used to execute: sending one or more messages from a wireless access node to a user equipment, the one or more messages causing the user equipment to prepare to report channel state information according to a plurality of channel state information reporting configurations, wherein the plurality of reporting configurations include at least a first reporting configuration and a second reporting configuration, for which the channel state information reporting by the user equipment depends on a trigger transmission to the user equipment; and sending a trigger transmission to the user equipment, wherein the trigger transmission triggers the user equipment to interrupt reporting the channel state information according to the second reporting configuration and instead report the channel state information according to the first reporting configuration.

[0053] A non-transitory computer-readable medium includes program instructions stored thereon, the program instructions being used to perform: receiving one or more messages from a wireless access node at a user equipment, the one or more messages preparing the user equipment to report channel state information according to a plurality of reporting configurations, wherein the plurality of reporting configurations include at least a first reporting configuration and a second reporting configuration, for which the channel state information reporting by the user equipment depends on a trigger transmission to the user equipment; and receiving a trigger transmission at the user equipment, wherein the trigger transmission triggers the user equipment to interrupt reporting the channel state information according to the second reporting configuration and instead report the channel state information according to the first reporting configuration.

[0054] A computer program includes computer executable code, which, when executed on at least one processor, is configured to cause a wireless access node to at least: send one or more messages to a user equipment, the one or more messages causing the user equipment to prepare to report channel state information according to multiple channel state information reporting configurations, wherein the multiple reporting configurations include at least a first reporting configuration and a second reporting configuration, for which the channel state information reporting performed by the user equipment depends on a triggered transmission to the user equipment; and send a triggered transmission to the user equipment, wherein the triggered transmission triggers the user equipment to interrupt reporting the channel state information according to the second reporting configuration and instead report the channel state information according to the first reporting configuration.

[0055] A computer program includes computer executable code, which, when executed on at least one processor, is configured to cause a user equipment to at least: receive one or more messages from a wireless access node, the one or more messages preparing the user equipment to report channel state information according to multiple reporting configurations, wherein the multiple reporting configurations include at least a first reporting configuration and a second reporting configuration, for which the channel state information reporting by the user equipment depends on a trigger transmission to the user equipment; and receive at the user equipment, wherein the trigger transmission triggers the user equipment to interrupt reporting the channel state information according to the second reporting configuration and instead report the channel state information according to the first reporting configuration.

[0056] In the above, many different aspects have been described. It should be understood that other aspects can be provided by combining any two or more of the above aspects.

[0057] Various other aspects are also described in the following detailed description and appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Some example embodiments will now be described in more detail, by way of example only, with reference to the following examples and accompanying drawings, in which:

[0059] Figure 1 A representation showing an example of an architecture in which embodiments may be applied;

[0060] Figure 2 According to an example embodiment, Figure 1 A representation of an example of operation of a user equipment and a gNB in ​​an architecture of FIG.

[0061] Figure 3 A representation showing an example of a CSI-RS switching of a UE to a power saving mode according to some example embodiments;

[0062] Figure 4 shows a representation of interrupted periodic CSI reporting according to some example embodiments;

[0063] Figure 5 Representations of examples of UE operation according to some example embodiments are shown.

[0064] Figure 6 A method for implementing the Figure 1 User equipment functionality of a user equipment of an architecture or Figure 1 A representation of an example of an arrangement of gNB functionality within the architecture of FIG.

[0065] Figure 7 According to some example embodiments Figure 1 a representation of an example of an antenna array of a radio unit of a gNB in ​​the architecture of FIG. 1 ; and

[0066] Figure 8 Representations of examples of non-volatile storage media are shown according to some example embodiments. DETAILED DESCRIPTION

[0067] For example, the following description focuses on examples of transmissions between a user equipment (UE) operating in accordance with 3GPP 5G technology and a wireless access node, but the underlying technology may also be applicable to transmissions between a user equipment operating in accordance with other technologies (such as more evolved 3GPP technologies) and an access network.

[0068] Figure 1 An example of a 5G NR architecture is shown with a connection between a UE and a data network (DN) via a radio access node (gNB) of a radio access network (RAN) and a 5G core network (5G CN).

[0069] The term "user equipment" (UE) may refer to any device, apparatus or component that implements at least 3GPP user equipment (UE) functionality.

[0070] A UE may be a mobile or static device (e.g., a portable or non-portable computing device), including but not limited to the following types of devices: mobile phones, smartphones, personal digital assistants (PDAs), handheld devices, devices using wireless modems (alarm or measurement devices, etc.), laptops and / or touch screen computers, tablets, game consoles, notebook computers, and multimedia devices. It should be understood that a UE device may also be almost exclusively an uplink-only device, an example of which is a camera or video camera that loads images or video clips to a network. A UE device may also be a device capable of operating in an Internet of Things (IoT) network, in which case objects are able to transmit data over a network without human-to-human or human-to-computer interaction, such as for smart grids and connected vehicles. The device may also use the cloud. In some applications, a UE device may include a user-portable device with a wireless component (such as a watch, headphones, or glasses), and the computation is performed in the cloud.

[0071] 5G supports the use of multiple-input multiple-output (MIMO) antennas and may involve a large number of base stations (gNBs), including macro sites that operate in cooperation with smaller base stations and employ various wireless technologies depending on service requirements, use cases and / or available spectrum. 5G mobile communications support a wide range of use cases and related applications, including video streaming, augmented reality, different data sharing methods, and various forms of machine-type applications (such as (massive) machine-type communications (mMTC), including vehicle safety, different sensors, and real-time control). 5G can adopt multiple wireless interfaces, such as cmWave and mmWave below 6GHz or above 24GHz, and can also be integrated with existing traditional wireless access technologies (such as LTE). Integration with LTE can be implemented as a system in which macro coverage is provided by LTE and 5G wireless interface access comes from small cells by aggregation to LTE. In other words, 5G can support inter-RAT operability (such as LTE-5G) and inter-RI operability (inter-radio interface operability, such as below 6GHz-cmWave, 6 or above 24GHz-cmWave and mmWave). 5G networks can adopt network slicing, in which multiple independent and dedicated virtual subnets (network instances) can be created within the same infrastructure to run services with different requirements for latency, reliability, throughput, and mobility.

[0072] Low-latency applications and services can be facilitated by bringing content close to 5G systems, enabling local offload and multi-access edge computing (MEC). 5G enables analysis and knowledge generation at the data source. This approach can involve leveraging resources that may not be continuously connected to the network, such as laptops, smartphones, tablets, and sensors. MEC provides a distributed computing environment for application and service hosting. It also enables storage and processing of content close to cellular subscribers for faster response times. Edge computing covers a wide range of technologies such as wireless sensor networks, mobile data acquisition, mobile signature analysis, collaborative distributed peer-to-peer networking and processing, and can also be categorized as local cloud / fog computing and mesh / grid computing, dew computing, mobile edge computing, cloudlet, distributed data storage and retrieval, autonomous self-healing networks, remote cloud services, augmented and virtual reality, data caching, Internet of Things (massive connectivity and / or latency critical), critical communications (autonomous vehicles, traffic safety, real-time analysis, time-critical control, healthcare applications).

[0073] 5G can also make use of satellite communications to enhance or complement the coverage of 5G services, for example by providing backhaul services. Possible use cases are to provide service continuity for machine-to-machine (M2M) or Internet of Things (IoT) devices or for passengers on board vehicles, mobile broadband (MBB), or to ensure service availability for critical communications and future railway / maritime / aeronautical communications. Satellite communications can make use of geostationary orbit (GEO) satellite systems, but also low earth orbit (LEO) satellite systems, in particular mega-constellations (systems in which hundreds of (nano) satellites are deployed). Each satellite in a mega-constellation can cover several satellite-enabled network entities creating ground cells. Ground cells can be created by ground relay nodes or by gNBs located on the ground or in satellites.

[0074] The UE's radio transmissions are sent from the antenna arrays of the gNB's radio units (RUs). Achieving a good radio link between the gNB and the UE involves the gNB obtaining information about the state of the radio channel between the gNB and the UE. This channel state information (CSI) is obtained by: transmitting reference signals (CSI-RS) from individual antenna ports (or individual groups of antenna ports) of the antenna array via corresponding radio resources defined by frequency, time and coding; and receiving CSI reports from the UE based on the results of measurements of these reference signals at the UE.

[0075] In addition to obtaining downlink (DL) channel state information, CSI-RS can also be used to derive measurements for mobility and beam management and for interference measurements, for example.

[0076] The CSI-RS resources of a UE may be defined by a number of physical transmission parameters, including: frequency allocation within a physical resource block (PRB) for the UE; time domain allocation within a PRB for the UE; and transmission power. The UE may be configured to measure and report measurements on one or more CSI-RS resources on a periodic, semi-persistent, or aperiodic basis. For example, a CSI-RS resource may include physical resources for CSI-RS for up to 1, 2, 4, 8, 16, or 32 antenna ports from an antenna array of a gNB. The CSI-RS of the UE is transmitted for each antenna port in the antenna port via a corresponding combination of physical resources (frequency, radio, coding) within the PRB for the UE. A PRB may include 12 OFDM subcarriers in the frequency domain and 1 time slot in the time domain. The density of CSI-RS transmission may be configured for each CSI-RS resource. For example, the density may be 0.5, 1, or 3.

[0077] In the time domain, the CSI-RS resource can start at any OFDM symbol within a slot, and the number of slots that the CSI-RS resource spans within a PRB can include 1, 2, or 4 OFDM symbols, depending on the number of gNB antenna ports used for the CSI-RS resources.

[0078] As described above, CSI reporting can be performed on a periodic, semi-persistent, or aperiodic basis. CSI-RS resource sets can be classified into periodic type CSI-RS resources, semi-persistent type CSI-RS resources, and aperiodic type CSI-RS. There may be restrictions on which type of reporting can be performed for each of these resource types. For example: CSI-RS resources classified as periodic type resources can be used to generate any of the three types of CSI reports sent to the gNB; CSI-RS resource sets classified as semi-persistent type or periodic type resources can be used for semi-persistent CSI reporting; and CSI resources classified as aperiodic type resources can be used for aperiodic CSI reporting.

[0079] Figure 2 A representation of operations at a gNB and a UE according to an example embodiment is shown.

[0080] Operations 100 and 110: In this example, the gNB prepares the UE for periodic CSI reporting for periodic type CSI-RS resources and prepares the UE for aperiodic CSI reporting for reduced CSI-RS resources. In this example, these operations 110 and 110 include the gNB sending one or more RRC messages to the UE in accordance with 3GPP TS38.311, the message including one or more csi-MeasConfig IEs (information elements). The csi-MeasConfig IE is used to configure CSI-RS channel state information reports to be sent on the PUCCH on the serving cell and channel state information reports on the PUSCH triggered by DCI received on the serving cell. The one or more csi-MeasConfig IEs include one or more csi-ReportConfigToAddModList IEs in accordance with 3GPP TS38.311. The one or more csi-ReportConfigToAddModList IEs include at least two CSI-ReportConfig IEs in accordance with 3GPP TS38.311. One of the two CSI-ReportConfig IEs is used to configure periodic reporting sent on the PUCCH, and one of the two CSI-ReportConfig IEs is used to configure aperiodic reporting sent on the PUSCH triggered by DCI.

[0081] The CSI-ReportConfig IE used to configure periodic reporting includes the following:

[0082] (i) reportConfigId IE in accordance with 3GPP TS38.311:

[0083] (ii) a resourcesForChannelMeasurement IE compliant with 3GPP TS38.311, which indicates a set of physical resources for CSI-RS within a PRB via (among others) a CSI-ResourceConfig IE compliant with 3GPP TS38.311 and a NZP-CSI-RS-Resource IE compliant with 3GPP TS38311. The NZP-CSI-RS-Resource IE includes: (a) a CSI-RS-resourceMapping IE compliant with 3GPP TS38.311, and (b) a powerControlOffset IE compliant with 3GPP TS38.311, which indicates the transmit power of the NZP CSI-RS. The CSI-RS-resourceMapping IE includes (1) an indication of the frequency domain allocation within a PRB;

[0084] (2) an indication of the number of antenna ports on which CSI-RS is transmitted within a PRB; and (3) an indication of the density of CSI-RS resources measured in units of REs per antenna port per PRB.

[0085] (iii) reportConfigType IE in accordance with 3GPP TS38.311, which indicates that the reporting type is periodic and does not require any DCI trigger transmission.

[0086] The CSI-ReportConfig IE used to configure aperiodic reporting includes the following:

[0087] (i) reportConfigId IE in accordance with 3GPP TS38.311:

[0088] (ii) a resourcesForChannelMeasurement IE compliant with 3GPP TS38.311, which indicates a set of physical resources for CSI-RS within a PRB via (among others) a CSI-ResourceConfig IE compliant with 3GPP TS38.311 and a NZP-CSI-RS-Resource IE compliant with 3GPP TS38311. The NZP-CSI-RS-Resource IE includes: (a) a CSI-RS-resourceMapping IE compliant with 3GPP TS38.311, and (b) a powerControlOffset IE compliant with 3GPP TS38.311, which indicates the transmit power of the NZP CSI-RS. The CSI-RS-resourceMapping IE includes (1) an indication of the frequency domain allocation within a PRB;

[0089] (2) an indication of the number of antenna ports on which CSI-RS is transmitted within a PRB; and (3) an indication of the density of CSI-RS resources measured in units of REs per antenna port per PRB. In this example, the aperiodic reporting configuration is characterized (compared to the periodic reporting configuration) by one or more power saving features, such as: fewer antenna ports and / or less density and / or lower power transmission.

[0090] (iii) reportConfigType IE in accordance with 3GPP TS38.311, which indicates that the report type is aperiodic and requires DCI triggered transmission; and in addition

[0091] (iv) Additional IE, which refers to the reportConfigID of the periodic report configuration,

[0092] The aperiodic reporting configuration is linked to the above-mentioned periodic reporting configuration.

[0093] Operation 120: The gNB determines to save energy for CSI-RS transmission of the UE in time slot #N by adopting one or more reduced CSI-RS transmission parameters for time slot #N. Figure 3 For example, a data transmission by the gNB to another UE (UE#1) in one or more previous time slots (#N-1, etc.) may involve a relatively small number of antenna ports (e.g., 16 ports), and the gNB has determined in this case to use the same small number of antenna ports for CSI-RS in the subsequent time slot #N. Figure 3 In the example shown, the periodic reporting configuration of UE#2 may involve CSI-RS resources for 32 antenna ports; and Figure 3In the case shown, the gNB may determine to discontinue sending CSI-RS for UE#2 from 32 antenna ports according to the periodic reporting configuration of UE#2, and instead send CSI-RS for UE#2 from a reduced number of antenna ports that matches the number of antenna ports used for downlink data transmission to UE#1 in time slots #N-2 and #N-1.

[0094] Operation 130: The gNB causes the DCI triggered transmission to trigger the UE to perform CSI reporting according to the aperiodic reporting configuration based on the measurement of the CSI-RS transmitted in time slot #N. As described above, the aperiodic reporting configuration includes an aperiodic trigger offset value that defines an offset (number of time slots) between the time slot containing the DCI triggered transmission and the time slot to which the DCI triggered transmission refers (i.e., the time slot containing the CSI-RS, the measurement of which is to be reported according to the aperiodic reporting configuration).

[0095] Operation 140: The gNB discontinues CSI-RS transmission for the UE in time slot #N according to the CSI-RS resources for the periodic reporting configuration, and instead performs CSI-RS transmission for the UE in time slot #N according to the reduced CSI-RS resources for the aperiodic reporting configuration.

[0096] Operation 150: In time slot #N; the explicit linking in the aperiodic reporting configuration to the periodic reporting configuration has the effect that the UE is configured to override the periodic reporting configuration in a time slot in which the aperiodic reporting (according to the aperiodic reporting configuration) is triggered by the DCI transmission. In time slot #N, the UE measures physical resources mapped to the reduced CSI-RS resources for the aperiodic reporting configuration; and the UE discontinues reporting CSI according to the periodic reporting configuration and instead reports CSI according to the aperiodic reporting configuration based on the measurement of the reduced CSI-RS resources.

[0097] As mentioned above, Figure 3Shows a representation of an example of the above technology in practical applications. In time slots #N-2 and #N-1, data transmission involving 16 antenna ports is scheduled for another UE #2, and CSI-RS transmission is scheduled for UE #1 in time slot #N. UE #1 is configured with: a periodic reporting configuration that involves periodic CSI-RS resources (P-CSI-RS) for N1 antenna ports, where N1 is 32; and an aperiodic reporting configuration that involves aperiodic CSI-RS resources (A-CSI-RS) for N2 antenna ports, where N2 is 16. The aperiodic reporting configuration is linked to the periodic reporting configuration in the above manner. As part of the energy-saving operation, the gNB determines that after the 16-port data transmission to UE #2 in time slots #N-2 and #N-1, a reduced (16-port) CSI-RS will be sent to UE #1 in time slot #N instead of the 32-port CSI-RS. The gNB sends a DCI trigger transmission to UE #1 to trigger CSI reporting according to the aperiodic reporting configuration within time slot #N. The link between the above aperiodic reporting configuration (involving CSI-RS resources for 16 antenna ports) and the periodic reporting configuration (involving CSI-RS resources for 32 antenna ports) causes UE #1 to interrupt the use of the periodic reporting configuration in time slot #N and perform CSI reporting only according to the aperiodic reporting configuration in time slot #N. The above values of N1 and N2 are examples, and other values are possible. For example, N1 can be 64 or 16, and N2 can be 32 or 8 accordingly, i.e., N2 = N1 / 2. In other examples, N2 = N1 / K, where K ≥ 2. Generally, N2 < N1, that is, N2 is a reduced value compared to N1.

[0098] Reference Figure 4In this example, the default periodic reporting configuration involves the UE measuring the periodic CSI-RS resources for the UE with a periodicity of m time slots and reporting CSI according to the periodic reporting configuration. In response to receiving a DCI trigger at time slot #(na) that triggers CSI reporting according to the aperiodic reporting configuration in time slot #n, the UE discontinues periodic CSI reporting in time slot #n and instead reports CSI according to the aperiodic reporting configuration based on the measurement of the reduced CSI-RS resources associated with the aperiodic reporting configuration in time slot #n. In time slot #n, the UE ignores the CSI-RS resources associated with the periodic reporting configuration and does not perform periodic CSI reporting (P-CSI reporting). The aperiodic CSI report temporarily overrides the periodic CSI report in time slot #n. Starting from the next periodic time slot #(n+m), the UE resumes periodic CSI reporting according to the periodic reporting configuration based on the measurement of the CSI-RS resources associated with the periodic reporting configuration. From the gNB perspective: the gNB periodically transmits CSI-RS for the UE on the CSI-RS resources associated with the periodic reporting configuration for the UE; the gNB interrupts these periodic CSI-RS transmissions in slot #n and instead transmits CSI-RS for the UE on the reduced CSI-RS resources associated with the aperiodic reporting configuration for the UE; and, starting from slot #(n+m), resumes CSI-RS transmissions for the UE on the CSI-RS resources associated with the periodic reporting configuration for the UE.

[0099] Figure 5 A representation of this example of UE operation is shown. The UE determines whether the UE has received a DCI trigger transmission (operation 500). If the result of the determination is positive, the UE interrupts the periodic CSI report within the next periodic CSI-RS time slot; the UE ignores the periodic type CSI-RS resources within the time slot and instead measures the reduced CSI-RS resources associated with the aperiodic reporting configuration; and the UE sends an aperiodic CSI report instead of a periodic CSI-RS report (operation 510). On the other hand, if the result of the determination is negative (no DCI trigger is received), the UE continues with periodic CSI reporting within the next periodic CSI-RS time slot; the UE measures the CSI-RS resources associated with the periodic reporting configuration and sends a periodic CSI report (operation 520). This set of operations is repeated within each periodic CSI-RS time slot of the UE.

[0100] In the above example, RRC messages are used to prepare the UE for periodic and aperiodic CSI reporting, but according to another example, other downlink transmissions may be used to prepare the UE, such as MAC (Media Access Control) CE (Control Element).

[0101] In the above example, the aperiodic reporting configuration includes an explicit link to the periodic reporting configuration. In another example: there may be no such explicit link, but the UE may be configured with a general priority rule according to which, in response to being triggered by, for example, a DCI triggered transmission to perform aperiodic reporting in time slot #N according to an aperiodic reporting configuration involving CSI-RS resources (which CSI-RS resources at least partially overlap with CSI-RS resources for the periodic reporting configuration), the UE overrides the periodic reporting configuration in time slot #N.

[0102] In the above example, the aperiodic reporting configuration is linked to the periodic reporting configuration, but in another example, the aperiodic reporting configuration is linked to a semi-persistent (SP) reporting configuration.

[0103] In the above technology, configuring the UE to cover the periodic reporting configuration in time slot #N in which the gNB sends CSI-RS according to reduced transmission parameters (e.g., a reduced number of antenna ports) can better avoid the gNB receiving damaged CSI reports from the UE and better reduce risks such as incorrect link adaptation, false detection of radio link failure, beam failure, etc.

[0104] One advantage of the above techniques is that they facilitate energy-efficient operation at the gNB with less performance impact on the UE and RAN, which can improve key system-level KPIs such as energy efficiency and sustainability.

[0105] Figure 6 The diagram shows the Figure 1 Implement UE functions in the architecture or for Figure 1 An example of an apparatus implementing gNB functionality in an architecture of . The apparatus may include at least one processor 802 coupled to one or more interfaces 808. In the case of a UE, the one or more interfaces 808 may include one or more interfaces to (multiple) other devices / components for which the UE functionality provides wireless communications, for example. In the case of a gNB, the one or more interfaces 808 may include one or more interfaces to one or more nodes implementing the functionality of a core network. The at least one processor 802 is also coupled to a wireless unit 804 including one or more antennas, etc., to perform and receive wireless transmissions. Figure 7 As shown, the wireless unit 804 may include an antenna array, which includes an array of antenna elements 810 (physical antenna ports). The gNB may map each of the above antenna ports to a corresponding antenna element in the antenna element 810. The at least one processor 802 may also be coupled to at least one memory 806. The at least one processor 802 may be configured to execute appropriate software codes to perform the above operations. The software code may be stored in the memory 806.

[0106] Figure 8 Schematic diagrams of non-volatile storage media 1100a (e.g., a computer compact disc (CD) or digital versatile disc (DVD)) and 1100b (e.g., a universal serial bus (USB) memory stick) storing instructions and / or parameters 1102 that, when executed by a processor, enable the processor to perform one or more steps of the method described above.

[0107] It should be noted that the example embodiments may be implemented as circuit systems in software, hardware, application logic, or a combination of software, hardware, and application logic. In example embodiments, the application logic, software, or instruction set is maintained on any computer program product or computer-readable medium. In the context of this document, a "computer-readable medium" may be any medium or component that can contain, store, convey, propagate, or transmit instructions for use by or in conjunction with an instruction execution system, apparatus, or device, such as a wireless access node or user equipment of the example embodiments described above. The term "non-transient" as used herein is a limitation on the medium itself (i.e., tangible, not a signal), not a limitation on the persistence of data storage (e.g., RAM vs. ROM).

[0108] As used in this application, the term "circuitry" may refer to one or more or all of the following: (a) a hardware circuit implementation only (such as an implementation in analog and / or digital circuitry only); and (b) a combination of hardware circuitry and software (and / or firmware), such as (as applicable): (i) a combination of analog and / or digital hardware circuitry and software / firmware, and (ii) any portion of a hardware processor(s) with software (including a digital signal processor(s), software, and memory(s) that work together to cause an apparatus (such as the user equipment or wireless access node of the above-described embodiments) to perform various functions); and (c) hardware circuitry and / or processor(s), such as a microprocessor(s) or a portion of a microprocessor(s) that requires software (e.g., firmware) to operate, but the software may not be present when software is not required to operate. This definition of "circuitry" applies to all uses of the term in this application, including in any claims. As a further example, as used in this application, the term "circuitry" also encompasses an implementation of a hardware circuit or processor(s) only or a portion of a hardware circuit or process and its accompanying software and / or firmware. For example, the term "circuitry" would also cover, if applicable to a particular claim element, a baseband integrated circuit or a processor integrated circuit for a mobile device, or a similar integrated circuit in a server, cellular network device, or other computing or networking device.

[0109] The features, advantages and characteristics described herein may be combined in any suitable manner in one or more example embodiments. Those skilled in the relevant art will recognize that such example embodiments may be practiced without one or more specific features or advantages of a particular embodiment. In other cases, additional features and advantages that may not be present in all example embodiments may be recognized in certain embodiments. It will be readily appreciated by those of ordinary skill in the art that the example embodiments described above may be practiced with steps in different orders and / or with hardware elements of configurations different from the disclosed configurations. Therefore, although some embodiments have been described based on these example embodiments, it will be appreciated by those skilled in the art that certain modifications, variations and alternative constructions will be clear while still within the spirit and scope of the example embodiments.

[0110] For example, example embodiments are described above in the context of a 5G system, but the same type of technology may also be applicable to other existing wireless access systems (e.g., Wi-Fi) as well as future systems (e.g., 6G).

Claims

1. A method comprising: sending, from a wireless access node to a user equipment, one or more messages, the one or more messages causing the user equipment to prepare to report channel state information according to a plurality of channel state information reporting configurations, wherein the plurality of reporting configurations comprises at least a first reporting configuration and a second reporting configuration, for which channel state information reporting by the user equipment is dependent on a triggered transmission to the user equipment; as well as The trigger transmission is sent to the user equipment, wherein the trigger transmission triggers the user equipment to discontinue reporting channel state information according to the second reporting configuration and instead report channel state information according to the first reporting configuration.

2. The method of claim 1 , wherein preparing the user equipment comprises: An indicator is provided to the user equipment that links the first reporting configuration to the second reporting configuration, wherein the indicator configures the user equipment to: interrupt reporting channel state information according to the second reporting configuration during one or more time intervals when the user equipment is triggered to report channel state information according to the first reporting configuration.

3. The method of claim 1 , wherein preparing the user equipment comprises: The user equipment is configured to follow a priority rule according to which, in response to determining that the reference signal resources for the second reporting configuration overlap with the reference signal resources for the first reporting configuration, the user equipment avoids reporting channel state information according to the second reporting configuration.

4. A method according to any preceding claim, wherein the second reporting configuration is a default configuration, and the user equipment reports the channel state information according to the default configuration in one or more time slots in which the user equipment is not triggered to report the channel state information according to the first reporting configuration.

5. The method according to any preceding claim, wherein the first reporting configuration is an aperiodic type reporting configuration, and wherein the second reporting configuration is a periodic type reporting configuration or a semi-persistent type reporting configuration.

6. A method according to any preceding claim, wherein the trigger transmission triggers the user equipment to ignore at least one reference signal resource associated with the second reporting configuration, the user equipment reporting channel state information according to the first reporting configuration.

7. A method according to any preceding claim, wherein the reference signal resources used for the first reporting configuration have one or more of the following characteristics compared to the reference signal resources used for the second reporting configuration: a reduced number of antenna ports; and / or reduced time-frequency resources; and / or reduced transmission power.

8. A method according to any preceding claim, comprising: During one or more time intervals in which the triggered transmission triggers the user equipment to report channel state information according to the first reporting configuration, the transmission of a reference signal according to at least one reference signal resource associated with the second reporting configuration is interrupted, and a reference signal is instead sent according to at least one reference signal resource associated with the first reporting configuration.

9. A method comprising: receiving, at a user equipment, one or more messages from a wireless access node, the one or more messages causing the user equipment to prepare to report channel state information according to a plurality of reporting configurations, wherein the plurality of reporting configurations comprises at least a first reporting configuration and a second reporting configuration, for which channel state information reporting by the user equipment is dependent on a triggered transmission to the user equipment; as well as The trigger transmission is received at the user equipment, wherein the trigger transmission triggers the user equipment to discontinue reporting channel state information according to the second reporting configuration and instead report channel state information according to the first reporting configuration.

10. A method according to claim 9, wherein the one or more messages include an indicator linking the first reporting configuration to the second reporting configuration, wherein the indicator configures the user equipment to: interrupt reporting the channel state information according to the second reporting configuration within one or more time intervals when the user equipment is triggered to report the channel state information according to the first reporting configuration.

11. A method according to claim 9, wherein the one or more messages configure the user equipment to follow a priority rule, according to which, in response to determining that the reference signal resources used for the second reporting configuration overlap with the reference signal resources used for the first reporting configuration, the user equipment avoids reporting channel state information according to the second reporting configuration.

12. The method according to any one of claims 9 to 11, wherein the second reporting configuration is a default reporting configuration, and the user equipment reports the channel state information according to the default reporting configuration in one or more time slots in which the user equipment is not triggered to report the channel state information according to the first reporting configuration.

13. The method according to any one of claims 9 to 12, wherein the first reporting configuration is an aperiodic type reporting configuration, and wherein the second reporting configuration is a periodic type reporting configuration or a semi-persistent type reporting configuration.

14. The method according to any one of claims 9 to 13, wherein the triggered transmission triggers the user equipment to ignore at least one reference signal resource associated with the second reporting configuration during a time slot in which the user equipment reports channel state information according to the first reporting configuration.

15. A method according to any one of claims 9 to 14, wherein the reference signal resources used for the first reporting configuration have one or more of the following characteristics compared to the reference signal resources used for the second reporting configuration: a reduced number of antenna ports; and / or reduced time-frequency resources; and / or reduced transmission power.

16. A wireless access node, comprising: means for sending one or more messages to a user equipment, the one or more messages causing the user equipment to prepare to report channel state information according to a plurality of channel state information reporting configurations, wherein the plurality of reporting configurations comprises at least a first reporting configuration and a second reporting configuration, for which channel state information reporting by the user equipment is dependent on a triggered transmission to the user equipment; as well as Means for sending the triggered transmission to the user equipment, wherein the triggered transmission triggers the user equipment to discontinue reporting channel state information according to the second reporting configuration and instead report channel state information according to the first reporting configuration.

17. A wireless access node according to claim 16, wherein the one or more messages include an indicator linking the first reporting configuration to the second reporting configuration, wherein the indicator configures the user equipment to: interrupt reporting channel state information according to the second reporting configuration during one or more time intervals when the user equipment is triggered to report channel state information according to the first reporting configuration.

18. A wireless access node according to claim 17, wherein the one or more messages configure the user equipment to follow a priority rule, according to which, in response to determining that the reference signal resources used for the second reporting configuration overlap with the reference signal resources used for the first reporting configuration, the user equipment avoids reporting channel state information according to the second reporting configuration.

19. A wireless access node according to any one of claims 16 to 18, wherein the second reporting configuration is a default configuration, and in one or more time slots in which the user equipment is not triggered to report channel state information according to the first reporting configuration, the user equipment reports the channel state information according to the default configuration.

20. The radio access node according to any one of claims 16 to 19, wherein the first reporting configuration is an aperiodic type reporting configuration, and wherein the second reporting configuration is a periodic type reporting configuration or a semi-persistent type reporting configuration.

21. The wireless access node according to any one of claims 16 to 20, wherein the trigger transmission triggers the user equipment to ignore at least one reference signal resource associated with the second reporting configuration, and the user equipment reports channel state information according to the first reporting configuration.

22. A wireless access node according to any one of claims 16 to 21, wherein the reference signal resources used for the first reporting configuration have one or more of the following characteristics compared to the reference signal resources used for the second reporting configuration: a reduced number of antenna ports; and / or reduced time-frequency resources; and / or reduced transmission power.

23. The wireless access node according to any one of claims 16 to 22, comprising: A component for interrupting the transmission of a reference signal according to at least one reference signal resource associated with the second reporting configuration within one or more time intervals in which the triggered transmission triggers the user equipment to report channel state information according to the first reporting configuration, and instead sending a reference signal according to at least one reference signal resource associated with the first reporting configuration.

24. A user equipment, comprising: means for receiving one or more messages from a wireless access node, the one or more messages causing the user equipment to prepare to report channel state information according to a plurality of reporting configurations, wherein the plurality of reporting configurations comprises at least a first reporting configuration and a second reporting configuration, for which channel state information reporting by the user equipment is dependent on a triggered transmission to the user equipment; as well as Means for receiving the trigger transmission, wherein the trigger transmission triggers the user equipment to discontinue reporting channel state information according to the second reporting configuration and instead report channel state information according to the first reporting configuration.

25. A user equipment according to claim 24, wherein the one or more messages include an indicator linking the first reporting configuration to the second reporting configuration, wherein the indicator configures the user equipment to: interrupt reporting channel state information according to the second reporting configuration within one or more time intervals when the user equipment is triggered to report channel state information according to the first reporting configuration.

26. A user equipment according to claim 24, wherein the one or more messages configure the user equipment to follow a priority rule, according to which, in response to determining that the reference signal resources used for the second reporting configuration overlap with the reference signal resources used for the first reporting configuration, the user equipment avoids reporting channel state information according to the second reporting configuration.

27. A user equipment according to any one of claims 24 to 26, wherein the second reporting configuration is a default reporting configuration, and in one or more time slots in which the user equipment is not triggered to report channel state information according to the first reporting configuration, the user equipment reports channel state information according to the default reporting configuration.

28. The user equipment according to any one of claims 24 to 27, wherein the first reporting configuration is an aperiodic type reporting configuration, and wherein the second reporting configuration is a periodic type reporting configuration or a semi-persistent type reporting configuration.

29. A user equipment according to any one of claims 24 to 28, wherein the triggered transmission triggers the user equipment to ignore at least one reference signal resource associated with the second reporting configuration during a time slot in which the user equipment reports channel state information according to the first reporting configuration.

30. A user equipment according to any one of claims 24 to 29, wherein the reference signal resources used for the first reporting configuration have one or more of the following characteristics compared to the reference signal resources used for the second reporting configuration: a reduced number of antenna ports; and / or reduced time-frequency resources; and / or reduced transmission power.

31. A wireless access node, comprising: at least one processor; as well as at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processor, cause the wireless access node to execute: sending one or more messages to a user equipment, the one or more messages causing the user equipment to prepare to report channel state information according to a plurality of channel state information reporting configurations, wherein the plurality of reporting configurations include at least a first reporting configuration and a second reporting configuration, for which channel state information reporting by the user equipment is dependent on a triggered transmission to the user equipment; as well as The trigger transmission is sent to the user equipment, wherein the trigger transmission triggers the user equipment to discontinue reporting channel state information according to the second reporting configuration and instead report channel state information according to the first reporting configuration.

32. A wireless access node according to claim 31, wherein the one or more messages include an indicator linking the first reporting configuration to the second reporting configuration, wherein the indicator configures the user equipment to: interrupt reporting channel state information according to the second reporting configuration within one or more time intervals when the user equipment is triggered to report channel state information according to the first reporting configuration.

33. A wireless access node according to claim 31, wherein the one or more messages configure the user equipment to follow a priority rule, according to which, in response to determining that the reference signal resources used for the second reporting configuration overlap with the reference signal resources used for the first reporting configuration, the user equipment avoids reporting channel state information according to the second reporting configuration.

34. A wireless access node according to any one of claims 31 to 33, wherein the second reporting configuration is a default configuration, and in one or more time slots in which the user equipment is not triggered to report channel state information according to the first reporting configuration, the user equipment reports the channel state information according to the default configuration.

35. The radio access node according to any one of claims 31 to 34, wherein the first reporting configuration is an aperiodic type reporting configuration, and wherein the second reporting configuration is a periodic type reporting configuration or a semi-persistent type reporting configuration.

36. The wireless access node according to any one of claims 31 to 35, wherein the trigger transmission triggers the user equipment to ignore at least one reference signal resource associated with the second reporting configuration, and the user equipment reports channel state information according to the first reporting configuration.

37. A wireless access node according to any one of claims 31 to 36, wherein the reference signal resources used for the first reporting configuration have one or more of the following characteristics compared to the reference signal resources used for the second reporting configuration: a reduced number of antenna ports; and / or reduced time-frequency resources; and / or reduced transmission power.

38. A wireless access node according to any one of claims 31 to 37, wherein the at least one memory and the computer program code are configured to, together with the at least one processor, cause the wireless access node to: interrupt the transmission of a reference signal according to at least one reference signal resource associated with the second reporting configuration, and instead send a reference signal according to at least one reference signal resource associated with the first reporting configuration, within one or more time intervals in which the triggered transmission triggers the user equipment to report channel state information according to the first reporting configuration.

39. A user equipment comprising: at least one processor; and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured to, together with the at least one processor, cause the user equipment to perform: receiving one or more messages from a wireless access node, the one or more messages causing the user equipment to prepare to report channel state information according to a plurality of reporting configurations, wherein the plurality of reporting configurations comprises at least a first reporting configuration and a second reporting configuration, for which channel state information reporting by the user equipment is dependent on a triggered transmission to the user equipment; as well as The trigger transmission is received, wherein the trigger transmission triggers the user equipment to discontinue reporting channel state information according to the second reporting configuration and instead report channel state information according to the first reporting configuration.

40. A user equipment according to claim 39, wherein the one or more messages include an indicator linking the first reporting configuration to the second reporting configuration, wherein the indicator configures the user equipment to: interrupt reporting channel state information according to the second reporting configuration within one or more time intervals when the user equipment is triggered to report channel state information according to the first reporting configuration.

41. A user equipment according to claim 39, wherein the one or more messages configure the user equipment to follow a priority rule, according to which, in response to determining that the reference signal resources used for the second reporting configuration overlap with the reference signal resources used for the first reporting configuration, the user equipment avoids reporting channel state information according to the second reporting configuration.

42. A user equipment according to any one of claims 39 to 41, wherein the second reporting configuration is a default reporting configuration, and in one or more time slots in which the user equipment is not triggered to report channel state information according to the first reporting configuration, the user equipment reports channel state information according to the default reporting configuration.

43. The user equipment according to any one of claims 39 to 42, wherein the first reporting configuration is an aperiodic type reporting configuration, and wherein the second reporting configuration is a periodic type reporting configuration or a semi-persistent type reporting configuration.

44. A user equipment according to any one of claims 39 to 43, wherein the triggered transmission triggers the user equipment to ignore at least one reference signal resource associated with the second reporting configuration during a time slot in which the user equipment reports channel state information according to the first reporting configuration.

45. A method according to any one of claims 39 to 44, wherein the reference signal resources used for the first reporting configuration have one or more of the following characteristics compared to the reference signal resources used for the second reporting configuration: a reduced number of antenna ports; and / or reduced time-frequency resources; and / or reduced transmission power.

46. ​​A wireless access node, comprising: transmitting circuitry for transmitting one or more messages to a user equipment, the one or more messages causing the user equipment to prepare to report channel state information according to a plurality of channel state information reporting configurations, wherein the plurality of reporting configurations include at least a first reporting configuration and a second reporting configuration, for which channel state information reporting by the user equipment is dependent on a triggered transmission to the user equipment; as well as Transmitting circuitry for transmitting the trigger transmission to the user equipment, wherein the trigger transmission triggers the user equipment to discontinue reporting channel state information according to the second reporting configuration and instead report channel state information according to the first reporting configuration.

47. A user device comprising: receiving circuitry for receiving one or more messages from a wireless access node, the one or more messages causing the user equipment to prepare to report channel state information according to a plurality of reporting configurations, wherein the plurality of reporting configurations comprises at least a first reporting configuration and a second reporting configuration, for which channel state information reporting by the user equipment is dependent on a triggered transmission to the user equipment; as well as and receiving circuitry for receiving the trigger transmission, wherein the trigger transmission triggers the user equipment to discontinue reporting channel state information according to the second reporting configuration and instead report channel state information according to the first reporting configuration.

48. A computer readable medium comprising program instructions stored thereon, the program instructions being configured to: sending, from a wireless access node to a user equipment, one or more messages, the one or more messages causing the user equipment to prepare to report channel state information according to a plurality of channel state information reporting configurations, wherein the plurality of reporting configurations comprises at least a first reporting configuration and a second reporting configuration, for which channel state information reporting by the user equipment is dependent on a triggered transmission to the user equipment; and The trigger transmission is sent to the user equipment, wherein the trigger transmission triggers the user equipment to discontinue reporting channel state information according to the second reporting configuration and instead report channel state information according to the first reporting configuration.

49. A computer readable medium comprising program instructions stored thereon, the program instructions being configured to: receiving, at a user equipment, one or more messages from a wireless access node, the one or more messages causing the user equipment to prepare to report channel state information according to a plurality of reporting configurations, wherein the plurality of reporting configurations comprises at least a first reporting configuration and a second reporting configuration, for which channel state information reporting by the user equipment is dependent on a triggered transmission to the user equipment; and The trigger transmission is received at the user equipment, wherein the trigger transmission triggers the user equipment to discontinue reporting channel state information according to the second reporting configuration and instead report channel state information according to the first reporting configuration.

50. A non-transitory computer readable medium comprising program instructions stored thereon, the program instructions being configured to: sending, from a wireless access node to a user equipment, one or more messages, the one or more messages causing the user equipment to prepare to report channel state information according to a plurality of channel state information reporting configurations, wherein the plurality of reporting configurations comprises at least a first reporting configuration and a second reporting configuration, for which channel state information reporting by the user equipment is dependent on a triggered transmission to the user equipment; and The trigger transmission is sent to the user equipment, wherein the trigger transmission triggers the user equipment to discontinue reporting channel state information according to the second reporting configuration and instead report channel state information according to the first reporting configuration.

51. A non-transitory computer readable medium comprising program instructions stored thereon, the program instructions being configured to: receiving, at a user equipment, one or more messages from a wireless access node, the one or more messages causing the user equipment to prepare to report channel state information according to a plurality of reporting configurations, wherein the plurality of reporting configurations comprises at least a first reporting configuration and a second reporting configuration, for which channel state information reporting by the user equipment is dependent on a triggered transmission to the user equipment; and The trigger transmission is received at the user equipment, wherein the trigger transmission triggers the user equipment to discontinue reporting channel state information according to the second reporting configuration and instead report channel state information according to the first reporting configuration.

52. A computer program comprising computer executable code, which when executed on at least one processor is configured to cause a wireless access node to at least: sending one or more messages to a user equipment, the one or more messages causing the user equipment to prepare to report channel state information according to a plurality of channel state information reporting configurations, wherein the plurality of reporting configurations comprises at least a first reporting configuration and a second reporting configuration, for which channel state information reporting by the user equipment is dependent on a triggered transmission to the user equipment; and The trigger transmission is sent to the user equipment, wherein the trigger transmission triggers the user equipment to discontinue reporting channel state information according to the second reporting configuration and instead report channel state information according to the first reporting configuration.

53. A computer program comprising computer executable code, which when executed on at least one processor is configured to cause a user device to at least: receiving one or more messages from a wireless access node, the one or more messages causing the user equipment to prepare to report channel state information according to a plurality of reporting configurations, wherein the plurality of reporting configurations comprises at least a first reporting configuration and a second reporting configuration, for which channel state information reporting by the user equipment is dependent on a triggered transmission to the user equipment; and The trigger transmission is received at the user equipment, wherein the trigger transmission triggers the user equipment to discontinue reporting channel state information according to the second reporting configuration and instead report channel state information according to the first reporting configuration.

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