Devices, methods, apparatuses and medium for event triggered beam reporting

Abstract

A terminal device (UE) selects an event from a plurality of events which occur within a time window. The UE transmits to a network device (base station, gNB) an uplink (UL) channel for transmitting CSI reports. The UE receives, from the network device, DCI scheduling the resource of the uplink channel to the UE and comprises a field capable of indicating information related to event triggered CSI reporting. UE transmits, to the network device, an event triggered CSI report corresponding to the selected event and determined based on the field(s) on the UL channel resource. The selected event may be an event: indicating switching to a new beam, indicating potential switch to a new beam, indicating a new beam having a better beam measurement result than the current beam, or an event with the best performance metric. Also disclosed, a corresponding network device which: receives an UL signal corresponding to an event requesting UL channel resource for transmitting CSI reports, transmits a DCI (which schedules the UL channel resources) comprising a field indicating triggered CSI reporting information, and receives an event triggered CSI report corresponding to the selected event and determined using the UL channel resource field.

Description

FIELD

[0001] Various example embodiments generally relate to the field of communication, and in particular, to terminal devices, network devices, methods, apparatuses and a computer readable storage medium related to event triggered beam reporting from the terminal device to the network device. BACKGROUND

[0002] A communication network can be seen as a facility that enables communications between two or more communication devices, or provides communication devices access to a data network. A mobile or wireless communication network is one example of a communication network.

[0003] Such communication networks operate in accordance with standards, such as those promulgated by 3GPP (Third Generation Partnership Project) or ETSI (European Telecommunications Standards Institute). Examples of such standards include the so-called 5G (5th Generation) standard or other standards promulgated by 3 GPP. SUMMARY

[0004] In general, example embodiments of the present disclosure provide terminal devices, network devices, methods, apparatuses and a computer readable storage medium for communication, for example, for event triggered beam reporting from the terminal device to the network device, especially for event triggered channel state information (CSI) reporting from the terminal device to the network device.

[0005] In a first aspect, there is provided a terminal device. The terminal device may comprise at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the terminal device at least to: transmit, to a network device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; receive, from the network device, a downlink control information, DCI, the DO schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and transmit, to the network device, at least one CSI report determined based on the at least one field on the resource of the uplink channel.

[0006] In a second aspect, there is provided a network device. The network device may comprise at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the network device at least to: receive, from a terminal device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; transmit, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and receive, from the terminal device, at least one CSI report determined based on the at least one field on the resource of the uplink channel.

[0007] In a third aspect, there is provided a method. The method may comprise: transmitting, to a network device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; receiving a downlink control information, DCI, from the network device, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and transmitting, to the network device, at least one CSI report determined based on the at least one field on the resource of the uplink channel.

[0008] In a fourth aspect, there is provided a method. The method may comprise: receiving, from a terminal device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; transmitting, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and receiving, from the terminal device, at least one CSI report determined based on the at least one field on the resource of the uplink channel.

[0009] In a fifth aspect, there is provided an apparatus. The apparatus may comprise: means for transmitting, to a network device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; means for receiving a downlink control information, DCI, from the network device, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and means for transmitting, to the network device, at least one CSI report determined based on the at least one field on the resource of the uplink channel.

[0010] In a sixth aspect, there is provided an apparatus. The apparatus may comprise: means for receiving, from a terminal device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; means for transmitting, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and means for receiving, from the terminal device, at least one CSI report determined based on the at least one field on the resource of the uplink channel.

[0011] In a seventh aspect, there is provided a non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least the method according to the third to fourth aspects.

[0012] In an eighth aspect, there is provided a computer program comprising instructions, which, when executed by an apparatus, cause the apparatus at least to: transmit, to a network device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; receive, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and transmit, to the network device, at least one CSI report determined based on the at least one field on the resource of the uplink channel.

[0013] In a ninth aspect, there is provided a computer program comprising instructions, which, when executed by an apparatus, cause the apparatus at least to: receive, from a terminal device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; transmit, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and receive, from the terminal device, at least one CSI report determined based on the at least one field on the resource of the uplink channel.

[0014] In a tenth aspect, there is provided a terminal device. The terminal device may comprise a transmitting circuitry configured to transmit, to a network device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; a receiving circuitry configured to receive, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and a transmitting circuitry configured to transmit, to the network device, at least one CSI report determined based on the at least one field on the resource of the uplink channel.

[0015] In an eleventh aspect, there is provided a network device. The network device may comprise a receiving circuitry configured to receive, from a terminal device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; a transmitting circuitry configured to transmit, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and a receiving circuitry configured to receive, from the terminal device, at least one CSI report determined based on the at least one field on the resource of the uplink channel.

[0016] In a twelfth aspect, there is provided a terminal device. The terminal device may comprise at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the terminal device at least to: select an event from a plurality of events when the plurality of events occur within a time window; transmit, to a network device, an uplink signal corresponding to the selected event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; receive, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and transmit, to the network device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

[0017] In a thirteenth aspect, there is provided a terminal device. The terminal device may comprise at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the terminal device at least to: transmit, to a network device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; receive, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; select an event triggered reporting configuration from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations; and transmit, to the network device, an event triggered CSI report corresponding to the selected event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel.

[0018] In a fourteenth aspect, there is provided a network device. The network device may comprise at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the network device at least to: receive, from a terminal device, an uplink signal corresponding to an event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports, wherein the event is selected from a plurality of events when the plurality of events occur within a time window; transmit, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and receive, from the terminal device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

[0019] In a fifteenth aspect, there is provided a network device. The network device may comprise at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the network device at least to: receive, from a terminal device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; transmit, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and transmit, to the terminal device, an event triggered CSI report corresponding to an event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel, wherein the event triggered reporting configuration is selected from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations.

[0020] In a sixteenth aspect, there is provided a method. The method may comprise: selecting an event from a plurality of events when the plurality of events occur within a time window; transmitting, to a network device, an uplink signal corresponding to the selected event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; receiving, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to a terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and transmitting, to the network device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

[0021] In a seventeenth aspect, there is provided a method. The method may comprise: transmitting, to a network device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; receiving, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to a terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; selecting an event triggered reporting configuration from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations; and transmitting, to the network device, an event triggered CSI report corresponding to the selected event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel.

[0022] In an eighteenth aspect, there is provided a method. The method may comprise: receiving, from a terminal device, an uplink signal corresponding to an event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports, wherein the event is selected from a plurality of events when the plurality of events occur within a time window; transmitting, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and receiving, from the terminal device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

[0023] In a nineteenth aspect, there is provided a method. The method may comprise: receiving, from a terminal device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; transmitting, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and transmitting, to the terminal device, an event triggered CSI report corresponding to an event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel, wherein the event triggered reporting configuration is selected from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations.

[0024] In a twentieth aspect, there is provided an apparatus. The apparatus may comprise: means for selecting an event from a plurality of events when the plurality of events occur within a time window; means for transmitting, to a network device, an uplink signal corresponding to the selected event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; means for receiving, from the network device, a downlink control information, DO, the DCI schedules the resource of the uplink channel to a terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and means for transmitting, to the network device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

[0025] In a twenty-first aspect, there is provided an apparatus. The apparatus may comprise: means for transmitting, to a network device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; means for receiving, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to a terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; means for selecting an event triggered reporting configuration from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations; and means for transmitting, to the network device, an event triggered CSI report corresponding to the selected event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel.

[0026] In a twenty-second aspect, there is provided an apparatus. The apparatus may comprise: means for receiving, from a terminal device, an uplink signal corresponding to an event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports, wherein the event is selected from a plurality of events when the plurality of events occur within a time window; means for transmitting, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and means for receiving, from the terminal device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

[0027] In a twenty-third aspect, there is provided an apparatus. The apparatus may comprise: means for receiving, from a terminal device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; means for transmitting, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and means for transmitting, to the terminal device, an event triggered CSI report corresponding to an event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel, wherein the event triggered reporting configuration is selected from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations.

[0028] In a twenty-fourth aspect, there is provided a non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least the method according to the sixteenth to nineteenth aspects.

[0029] In a twenty-fifth aspect, there is provided a computer program comprising instructions, which, when executed by an apparatus, cause the apparatus at least to: select an event from a plurality of events when the plurality of events occur within a time window; transmit, to a network device, an uplink signal corresponding to the selected event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; receive, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and transmit, to the network device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

[0030] In a twenty-sixth aspect, there is provided a computer program comprising instructions, which, when executed by an apparatus, cause the apparatus at least to: transmit, to a network device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; receive, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; select an event triggered reporting configuration from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations; and transmit, to the network device, an event triggered CSI report corresponding to the selected event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel.

[0031] In a twenty-seventh aspect, there is provided a computer program comprising instructions, which, when executed by an apparatus, cause the apparatus at least to: receive, from a terminal device, an uplink signal corresponding to an event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports, wherein the event is selected from a plurality of events when the plurality of events occur within a time window; transmit, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and receive, from the terminal device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

[0032] In a twenty-eighth aspect, there is provided a computer program comprising instructions, which, when executed by an apparatus, cause the apparatus at least to: receive, from a terminal device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; transmit, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and transmit, to the terminal device, an event triggered CSI report corresponding to an event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel, wherein the event triggered reporting configuration is selected from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations.

[0033] In a twenty-ninth aspect, there is provided a terminal device. The terminal device may comprise a selecting circuitry configured to select an event from a plurality of events when the plurality of events occur within a time window; a transmitting circuitry configured to transmit, to a network device, an uplink signal corresponding to the selected event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; a receiving circuitry configured to receive, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and a transmitting circuitry configured to transmit, to the network device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

[0034] In a thirtieth aspect, there is provided a terminal device. The terminal device may comprise a transmitting circuitry configured to transmit, to a network device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; a receiving circuitry configured to receive, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; a selecting circuitry configured to select an event triggered reporting configuration from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations; and a transmitting circuitry configured to transmit, to the network device, an event triggered CSI report corresponding to the selected event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel.

[0035] In a thirty-first aspect, there is provided a network device. The terminal device may comprise a receiving circuitry configured to receive, from a terminal device, an uplink signal corresponding to an event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports, wherein the event is selected from a plurality of events when the plurality of events occur within a time window; a transmitting circuitry configured to transmit, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and a receiving circuitry configured to receive, from the terminal device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

[0036] In a thirty-second aspect, there is provided a network device. The terminal device may comprise a receiving circuitry configured to receive, from a terminal device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; a transmitting circuitry configured to transmit, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and a transmitting circuitry configured to transmit, to the terminal device, an event triggered CSI report corresponding to an event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel, wherein the event triggered reporting configuration is selected from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations.

[0037] It is to be understood that the summary section is not intended to identify key or essential features of embodiments of the present disclosure, nor is it intended to be used to limit the scope of the present disclosure. Other features of the present disclosure will become easily comprehensible through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Some example embodiments will now be described with reference to the accompanying drawings, in which:

[0039] FIG. 1 illustrates an example of an application scenario in which some example embodiments of the present disclosure may be implemented;

[0040] FIG. 2 illustrates an example signaling process for event triggered beam reporting from a terminal device to a network device according to some embodiments of the present disclosure;

[0041] FIG. 3 illustrates an example signaling process for event triggered beam reporting from a terminal device to a network device according to some other embodiments of the present disclosure;

[0042] FIG. 4 illustrates an example signaling process for event triggered beam reporting from a terminal device to a network device according to yet some other embodiments of the present disclosure;

[0043] FIG. 5 illustrates a flowchart of an example method implemented at a terminal device in accordance with some embodiments of the present disclosure;

[0044] FIG. 6 illustrates a flowchart of an example method implemented at a network device in accordance with some embodiments of the present disclosure;

[0045] FIG. 7 illustrates a flowchart of an example method implemented at a terminal device in accordance with some other embodiments of the present disclosure;

[0046] FIG. 8 illustrates a flowchart of an example method implemented at a terminal device in accordance with yet some other embodiments of the present disclosure;

[0047] FIG. 9 illustrates a flowchart of an example method implemented at a network device in accordance with some other embodiments of the present disclosure;

[0048] FIG. 10 illustrates a flowchart of an example method implemented at a network device in accordance with yet some embodiments of the present disclosure;

[0049] FIG. 11 illustrates an example simplified block diagram of a device that is suitable for implementing embodiments of the present disclosure; and

[0050] FIG. 12 illustrates an example block diagram of an example computer readable medium in accordance with some example embodiments of the present disclosure.

[0051] Throughout the drawings, the same or similar reference numerals represent the same or similar element. DETAILED DESCRIPTION

[0052] Principles of the present disclosure will now be described with reference to some example embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. The disclosure described herein may be implemented in various manners other than the ones described below.

[0053] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which the present disclosure belongs.

[0054] References in the present disclosure to “one embodiment,” “an embodiment,” “an example embodiment,” and the like indicate that the embodiment described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes 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, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

[0055] It may be understood that although the terms “first”, “second”, “third”, “fourth” etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and similarly, a second element could be termed a first element, without departing from the scope of example embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.

[0056] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises”, “comprising”, “has”, “having”, “includes” and / or “including”, when used herein, specify the presence of stated features, elements, and / or components etc., but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof. As used herein, “at least one of the following: ” and “at least one of ” and similar wording, where the list of two or more elements are joined by “and” or “or”, mean at least any one of the elements, or at least any two or more of the elements, or at least all the elements.

[0057] As used in this application, the term “circuitry” may refer to one or more or all of the following: (a) hardware-only circuit implementations (such as implementations in only analog and / or digital circuitry) and (b) combinations of hardware circuits and software, such as (as applicable): (i) a combination of analog and / or digital hardware circuit(s) with software / firmware and (ii) any portions of hardware processor(s) with software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and (c) hardware circuit(s) and or processor(s), such as a microprocessor s) or a portion of a microprocessor(s) that requires software (e.g., firmware) for operation, but the software may not be present when it is not needed for operation.

[0058] This definition of circuitry applies to all uses of this term in this application, including in any claims. As a further example, as used in this application, the term circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and / or firmware. The term circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.

[0059] As used herein, the term “communication network” refers to a network following any suitable communication standards, such as new radio (NR), long term evolution (LTE), LTE-advanced (LTE-A), wideband code division multiple access (WCDMA), high-speed packet access (HSPA), narrow band Internet of things (NB-IoT) and so on. Furthermore, the communications between a terminal device and a network device in the communication network may be performed according to any suitable generation communication protocols, including, but not limited to, the third generation (3G), the fourth generation (4G), 4.5G, the fifth generation (5G) communication protocols, the sixth generation (6G) communication protocols, and / or beyond. Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will of course also be future type communication technologies and systems with which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned system.

[0060] As used herein, the term “network device” refers to a node in a communication network via which a terminal device accesses the network and receives services therefrom. The network device may refer to a base station (BS) or an access point (AP), for example, a node B (NodeB or NB), an evolved NodeB (eNodeB or eNB), a NR NB (also referred to as a gNB), a transmit-receive point (TRP), a remote radio unit (RRU), a radio header (RH), a remote radio head (RRH), a relay, a low power node such as a femto, a pico, an Integrated Access and Backhaul (IAB) node, a non-terrestrial network (NTN) or non-ground network device such as a satellite network device, a low earth orbit (LEO) satellite and a geosynchronous earth orbit (GEO) satellite, an aircraft network device, and so forth, depending on the applied terminology and technology. In some example embodiments, radio access network (RAN) split architecture comprises a Centralized Unit (CU) and a Distributed Unit (DU) at an IAB donor node. An IAB node comprises a Mobile Terminal (IAB-MT) part that behaves like a UE toward the parent node, and a DU part of an IAB node behaves like a base station toward the next-hop IAB node.

[0061] The term “terminal device” refers to any end device that may be capable of wireless communication. By way of example rather than limitation, a terminal device may also be referred to as a communication device, user equipment (UE), a subscriber station (SS), a portable subscriber station, a mobile station (MS), or an access terminal (AT). The terminal device may include, but not limited to, a mobile phone, a cellular phone, a smart phone, voice over IP (VoIP) phones, wireless local loop phones, a tablet, a wearable terminal device, a personal digital assistant (PDA), portable computers, desktop computer, image capture terminal devices such as digital cameras, gaming terminal devices, music storage and playback appliances, vehicle-mounted wireless terminal devices, wireless endpoints, mobile stations, laptop-embedded equipment (LEE), laptop-mounted equipment (LME), USB dongles, smart devices, wireless customer-premises equipment (CPE), an Internet of things (loT) device, a watch or other wearable, a head-mounted display (HMD), a vehicle, a drone, a medical device and applications (e.g., remote surgery), an industrial device and applications (e.g., a robot and / or other wireless devices operating in an industrial and / or an automated processing chain contexts), a consumer electronics device, a device operating on commercial, a relay node, an integrated access and backhaul (IAB) node, and / or industrial wireless networks, and the like. In the following description, the terms “terminal device”, “communication device”, “terminal”, “user equipment” and “UE” may be used interchangeably.

[0062] As used herein, the term “resource”, “transmission resource”, “resource block”, “physical resource block” (PRB), “uplink (UL) resource” or “downlink (DL) resource” may refer to any resource for performing a communication, for example, a communication between a terminal device and a network device, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, a resource in a combination of more than one domain or any other resource enabling a communication, and the like. In the following, a resource in time domain (such as, a subframe) will be used as an example of a transmission resource for describing some example embodiments of the present disclosure. It is noted that example embodiments of the present disclosure are equally applicable to other resources in other domains.

[0063] In a communication technology, the third generation partnership project (3GPP) discusses objectives for specifying enhancements to facilitate event triggered beam management (also could be referred to as UE initiated beam management or event driven beam management). Several modes for supporting beam report transmission procedure are supported. For example, the UE may request the network to allocate a resource for beam reporting and then transmit beam reports on the resource allocated by the network. 3 GPP also studied a plurality of different events for triggering the event triggered beam reporting. Furthermore, one of the objectives of 3GPP NR mobility enhancements is to specify necessary components to support event triggered layer 1 (LI) measurement reporting (such as CSI reporting but not limited to it) for L1 / L2 triggered mobility (LTM), which may be referred also as L1 / L2 centric mobility, lower layer triggered mobility, or L2 mobility. However, the inventors of the present application realized that the UE may not know whether the event triggered beam reports or other kinds of beam reports (e.g., aperiodic beam reports) should be reported when there is a resource been allocated, and the event triggered beam report corresponding to which event should be reported to the network. How to indicate the UE to report the event triggered beam reports and how to determine to transmit the event triggered beam report corresponding to which event need to be studied.

[0064] Therefore, some example embodiments of the present disclosure provide a solution for indicating the UE to report the event triggered beam reports. According to these embodiments of the present disclosure, a terminal device (e.g., a UE) transmits, to a network device (e.g., a gNB), an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports. Afterwards, the terminal device receives, from the network device, a downlink control information, DCI. The DCI may schedule the resource of the uplink channel to the terminal device and comprise at least one field capable of indicating information related to event triggered CSI reporting. Then, the terminal device transmits, to the network device, at least one CSI report determined based on the at least one field on the resource of the uplink channel.

[0065] In some example embodiment, the CSI report may refer to LI report (e.g. UCI, Uplink control information report) or Media Access Control (MAC) Control Element (CE) (CSI) reporting. The CSI report may comprise one or more Resource Indicators (e.g. Synchronization Signal Block (SSB) Resource Indicator or Channel State Information Reference Signal (CSI-RS) Resource Indicators) and corresponding measurement quantity. A measurement quantity may be e.g. (Ll-)RSRP (reference signal received power) or (Ll-)SINR (signal to interference plus noise ratio). In some example embodiments, the reported information may comprise CSI-related information, such as one or more of the layer indicator (LI), Ll-RSRP, Ll-SINR, CSI-RS Resource Indicator (CRI), SSBRI (SSB Resource Indicator), Capability Index or time domain channel properties (TDCP).

[0066] In some example embodiments, a beam report may refer to CSI report. CSI report may be e.g. periodic, aperiodic, semi-persistent or event triggered CSI report.

[0067] Some other example embodiments of the present disclosure provide a solution for determining to transmit the event triggered beam report corresponding to which event to the network. According to these embodiments of the present disclosure, a terminal device (e.g., a UE) selects an event from a plurality of events when the plurality of events occur within a time window / time duration. Afterwards, the terminal device transmits, to a network device (e.g., a gNB), an uplink signal corresponding to the selected event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports. Afterwards, the terminal device receives, from the network device, a downlink control information, DO. The DCI may schedule the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting. Then, the terminal device transmits, to the network device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

[0068] Yet some other example embodiments of the present disclosure provide another solution for determining to transmit the event triggered beam report corresponding to which event to the network. According to these embodiments of the present disclosure, a terminal device (e.g., a UE) transmits, to a network device (e.g., a gNB), an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports. Afterwards, the terminal device receives, from the network device, a downlink control information, DCI. The DCI may schedule the resource of the uplink channel to the terminal device and comprise at least one field capable of indicating information related to event triggered CSI reporting. Afterwards, the terminal device selects an event triggered reporting configuration from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations. Then, the terminal device transmits, to the network device, an event triggered CSI report corresponding to the selected event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel.

[0069] It is understood that the above procedure steps may work together, in a flow of operations as described below, partly together or independently of each other. By implementing the embodiments of the present disclosure, the UE could be indicated whether to transmit the event triggered beam reports or other kinds of beam reports, and it also could be determined the event triggered beam report corresponding to which event is to be transmitted to the network when there are multiple events occurring at the same time (or within a time window). Thus, it improves the efficiency and accuracy of the event triggered beam reporting.

[0070] For illustrative purposes, principles and example embodiments of the present disclosure of event triggered beam reporting will be described below with reference to FIG. 1 through FIG. 12. However, it is to be noted that these embodiments are given to enable the skilled in the art to understand inventive concepts of the present disclosure and implement the solution as proposed herein, and not intended to limit scope of the present application in any way.

[0071] FIG. 1 illustrates an example of an application scenario 100 in which some example embodiments of the present disclosure may be implemented. The network environment 100, which may be a part of a communication network, includes a terminal device 102 and a network device 104.

[0072] As illustrated in FIG. 1, the terminal device 102 and the network device 104 may have a plurality of beams directed at various directions. The terminal device 102 and the network device 104 can communicate with each other via the plurality of beams. The terminal device 102 may also be referred to as a user equipment 102 or a UE 102. The network device 104 may also be referred to as a TRP or gNB. The terminal device 102 can perform uplink / downlink transmission to / from the network device 104. The terminal device 102 may measure the plurality of beams and report beam reports corresponding to the plurality of beams to the network device 104.

[0073] FIG. 2 illustrates an example signaling process 200 for event triggered beam reporting from a terminal device (for example, a terminal device 202 or a UE 202) to a network device (for example, a TRP 204 or a gNB 204) according to some embodiments of the present disclosure. The terminal device 202 may refer to the terminal device 102 in FIG. 1 and the network device 204 may refer to the network device 104 in FIG. 1.

[0074] At 210, the terminal device 202 may transmit, to the network device 204, an uplink signal for requesting a resource of an uplink channel for transmitting beam (e.g., CSI, signal to interference plus noise ratio (SINR) or reference signal received power (RSRP) reports). At the same time, in a reverse direction, the network device 204 may receive, from the terminal device 202, an uplink signal for requesting a resource of an uplink channel for transmitting CSI reports. The terminal device 202 may transmit the resource request using one or more bits via a first uplink channel (e.g., a physical uplink control channel (PUCCH)) for requesting a resource of a second uplink channel (e.g., PUCCH or physical uplink shared channel (PUSCH)) for beam reporting. The resource request may be a scheduling request (SR) or an uplink channel information (UCI) type. The UCI type may carry one or more bits.

[0075] In some example embodiments, the uplink signal for requesting a resource of an uplink channel for transmitting (event triggered) CSI reports may be associated with a certain CSI reporting configuration identifier (ID).

[0076] In some example embodiments, the uplink signal for requesting a resource of an uplink channel for transmitting (event triggered) CSI reports may be associated with a certain event triggered reporting configuration identifier (ID).

[0077] In some example embodiments, the uplink signal for requesting a resource of an uplink channel for transmitting (event triggered) CSI reports may be associated with a certain event identifier (ID).

[0078] In some example embodiments, the DCI requesting the (event) triggered CSI report may comprise a field indicating the requested report in format of: codepoint (mapping to reporting configuration ID or event ID) or identifier indicating a reporting configuration identifier (ID).

[0079] In any of the examples, the DCI requesting the (event) triggered CSI report may additionally provide the terminal device 202 with an uplink resource for transmitting the report.

[0080] In any of the examples, the DCI may provide the terminal device 202 with an uplink resource, wherein the uplink resource may be PUCCH resource or PUSCH resource. The DCI provisioning the uplink resource may further request the terminal device 202 to provide an (event) triggered CSI report.

[0081] In some examples, an SR (identifier) may be used to request resources for (event triggered) CSI reporting. The SR may be configured as dedicated SR for event triggered reporting. In one example, an SR identifier may be configured as dedicated SR identifier for (event triggered) CSI reporting. In one example, an SR identifier may be configured as a dedicated SR identifier for a certain event, for a certain event identifier or (CSI) reporting configuration. In one example, the SR identifier (for requesting resources for CSI reporting and / or indicating an event) may be configured in a MAC layer configuration (e.g. MAC-CellGroupConfig RRC parameter) or in a CSI reporting configuration, or the SR identifier can be associated with a certain CSI reporting configuration. In a further example, the transmission of the SR with a certain identifier may indicate to the network device 204 that the UE requests uplink resources for transmitting the (event triggered) CSI report associated with the SR identifier.

[0082] In some examples, the event triggered CSI reporting may be triggered based on one or more of the following example events: • The quality value of at least one RS of a set of RSs is below a threshold. The quality value may include, for example, any one or more of RSRP, SINR, or any signal quality metric value(s). In other words, the quality value, for example RSRP, of at least one specific RS is below a threshold. • The quality value of at least one RS of a set of RSs is above a threshold. The quality value may include, for example, any one or more of: RSRP, SINR, or any signal quality metric value(s). In other words, the quality value, for example RSRP, of at least one specific RS is above a threshold. • The quality value of at least one RS of a set of RS is higher than the quality value of a certain reference signal by at least an offset. The certain reference signal may be the reference signal or the Quasi Co-Location (QCL) source of the reference signal included in an indicated or activated Transmission Configuration Indication (TCI) State. The quality value may include, for example, any one or more of: RSRP, SINR, or any signal quality metric value(s). The offset value may be configurable and may be expressed in decibels, dBs, for example, 3dB, OdB, -3dB, etc.

[0083] In some example embodiments, filtered measurement results may be used. At 220, the terminal device 202 may receive, from the network device 204, a downlink control information, DCI. At the same time, in a reverse direction, the network device 204 may transmit, to the terminal device 202, the DCI. The DCI may schedule the resource of the uplink channel to the terminal device 202 and comprises at least one field capable of indicating information related to event triggered CSI reporting. In this way, the terminal device 202 could get a resource for beam reporting, and determine the event triggered reporting configurations (for which a report or reports are requested and / or the resource is provided) and whether or not to transmit the event triggered CSI reports based on the at least one field. Then, at 230, the terminal device 202 may transmit, to the network device 204, at least one CSI report determined based on the at least one field on the resource of the uplink channel allocated by the network device 204. At the same time, in a reverse direction, the network device 204 may receive, from the terminal device 202, the at least one CSI report determined based on the at least one field on the resource of the uplink channel.

[0084] In some example embodiments, presence of the at least one field may be configured by at least one radio resource control (RRC) signaling. In this way, the function of indicating the terminal device 202 to report the event triggered beam reports could be flexibly enabled or disabled. In some examples, the RRC may configure a bit width of the at least one field.

[0085] In some example embodiments, the at least one field may comprise a first field, which indicates a CSI request field in the DCI is to be interpreted as indicating an information related to an aperiodic CSI request or an information related to at least one event triggered CSI report. The first field may be in a length of one bit. For example, when the first field is configured to be present in the DCI, a first value (e.g., “0”) of the first field may indicate the CSI request field in the DCI is to be interpreted as indicating an information related to the aperiodic CSI request, and a second value (e.g., “1”) of the first field indicates the CSI request field in the DCI is to be interpreted as indicating an information related to the at least one event triggered CSI report. In some example embodiments, the at least one field may comprise a first field, which indicates a CSI request field in the DCI is to be interpreted as indicating an information related to event triggered reporting. In some example embodiments, the at least one field may comprise a first field, which indicates a CSI request field in the DCI is to be interpreted as indicating an information related to at least one event triggered CSI report. In this way, the CSI request field could be also used for carrying the information related to at least one event triggered CSI report, and the terminal device 202 could be indicated to report event triggered beam reports using just one or a few bits, which would not add so much signaling overhead.

[0086] In some example embodiments, a DCI format (e.g. DCI format 01 or other DCI format scheduling uplink resource allocation) may have Cyclic Redundancy Check (CRC) scrambled by a Radio Network Temporary Identity (RNTI) specific to (event triggered) CSI reporting. Having the DCI format CRC scrambled by a RNTI specific to (event triggered) CSI reporting may indicate that (event triggered) CSI reporting information is provided by the DCI and / or CSI reporting is requested.

[0087] In some example embodiments, the DCI format (DCI format 01 or other DCI format scheduling uplink resource allocation) with CRC scrambled by a RNTI specific to (event triggered) CSI reporting may indicate that a CSI request field in the DCI is to be interpreted as indicating an information related to at least one event triggered CSI report. The information related to the event triggered CSI report may indicate the UE to report according to a certain CSI reporting configuration. In some examples, the RNTI specific to (event triggered) CSI reporting may cause the resource allocation indicated by the DCI (with CRC scrambled with the RNTI) to be interpreted as resource allocation for (event triggered) CSI reporting. The benefit of having RNTI specific for (even triggered / UE initiated beam management) is that existing DCI format can be used for requesting event triggered CSI report and one or more fields of the DCI format may be re-interpreted. This enables lower complexity implementation of the event triggered reporting feature at network and terminal device. In some example embodiments, the information related to the aperiodic CSI request may comprise a codepoint value for the aperiodic CSI request. In some example embodiments, the information related to the at least one event triggered CSI report may comprise at least one event triggered reporting configuration identifier. Alternatively or additionally, the information related to the at least one event triggered CSI report may comprise at least one codepoint value associated with at least one event triggered reporting configuration identifier. Alternatively or additionally, the information related to the at least one event triggered CSI report may comprise at least one uplink signal identifier codepoint value associated with at least one event triggered reporting configuration identifier. The at least one event triggered reporting configuration identifier may be mapped to the at least one uplink signal identifier codepoint value starting from the lowest uplink signal identifier codepoint value. In this way, several specific manners for indicating the event triggered reporting configuration to the terminal device 202 are provided.

[0088] In some example embodiments, the terminal device 202 may determine the at least one event triggered reporting configuration identifier based on the first field indicating the second value (e.g., “1”) and the CSI request field. Based on the first field indicating the second value (e.g., “1”), the terminal device 202 may know the CSI request field currently indicating the information related to the event triggered CSI reports, and based on the CSI request field, the terminal device 202 may be requested / indicated to provide the event triggered report (according to the requested configuration(s)) Then, the terminal device 202 may determine to report the at least one event triggered CSI report based on at least one event triggered reporting configuration indicated by the at least one event triggered reporting configuration identifier. One of the benefits of the first field is that it has a minimal increase on the signaling overhead.

[0089] In some example embodiments, the terminal device 202 may determine the at least one event triggered reporting configuration identifier is indicated based on a RNTI (such a RNTI specific for event triggered reporting / UE initiated beam management) used to mask the CRC of the DCI format. The terminal device 202 may determine the information provided by the CSI request field to provide information related to the event triggered CSI reports. Based on the at least one field (e.g. CSI request field), the terminal device 202 may be requested to provide event triggered reports. Then, the terminal device 202 may determine to report the at least one event triggered CSI report based on at least one event triggered reporting configuration indicated by the at least one event triggered reporting configuration identifier.

[0090] Alternatively or additionally, the terminal device 202 may determine the aperiodic CSI request based on the first field indicating the first value (e.g., “0”) and the CSI request field. Based on the first field indicating the first value (e.g., “0”), the terminal device 202 may know the CSI request field currently indicating the information related to the aperiodic CSI request, and based on the CSI request field, the terminal device 202 could get the aperiodic CSI request. Then, the terminal device 202 may determine to report at least one aperiodic CSI report to the network device 204.

[0091] In some example embodiments, the at least one field comprises a second field, which indicates whether the terminal device 202 is configured to provide event triggered CSI reports. The first field may be in a length of one bit. For example, when the second field is configured to be present in the DCI, a first value (e.g., “0”) of the second field indicates the terminal device 202 is not configured to provide event triggered CSI reports in scheduled uplink channel resources, and a second value (e.g., “1”) of the second field indicates the terminal device 202 is configured to provide event triggered CSI reports in scheduled uplink channel resources. The scheduled uplink channel resources may be resources on an uplink sharing channel (UL-SCH). In this way, the terminal device 202 could be configured or not configured to provide event triggered CSI reports using just one or a few bits, which would not add so much signaling overhead.

[0092] In some example embodiments, the terminal device 202 may determine to report the at least one event triggered CSI report based on the second field (e.g., “1”) indicating the terminal device 202 is configured to provide event triggered CSI reports and a transmitted uplink signal (e.g., a latest transmitted uplink signal) associated with an event identifier. Based on the second field indicating the second value (e.g., “1”), the terminal device 202 may know it is configured to provide event triggered CSI reports, and based on the transmitted uplink signal associated with an event identifier, the terminal device 202 could know the event triggered CSI report corresponding to the event indicated by the event identifier should be transmitted.

[0093] In some example embodiments, the at least one field comprises a third field, which indicates at least one event triggered CSI report configuration identifier. In this way, when the third field is configured to be present in the DCI, the terminal device 202 would get the event triggered CSI report configuration identifier and know which event triggered CSI report corresponding to the event triggered CSI report configuration indicated by the identifier should be transmitted.

[0094] In some example embodiments, the third field may have a length of N bits, and the third field may indicate a codepoint, which indicates one event triggered CSI report configuration identifier in 2N-1 event triggered CSI report configuration identifiers or no event triggered CSI report is required, N is a positive integer. For example, the third field may have a length of 2 bits and is capable to indicate 3 (i.e., 22-l) event triggered CSI report configuration identifiers, meanwhile one value of the third field (e.g., “00”) is used to indicate no event triggered CSI report is requested. In some example embodiments, the codepoint values may be mapped to the event triggered CSI report configuration identifiers in an ascending / descending order.

[0095] Alternatively or additionally, the third field may have a length of N bits, and each bit of the third field may indicate one event triggered CSI report configuration identifier in N event triggered CSI report configuration identifiers or no event triggered CSI report is required, N is a positive integer. For example, the third field may have a length of 2 bits and is capable to indicate 2 event triggered CSI report configuration identifiers. For example, when the third field is configured to be present in the DCI, a first value (e.g., “0”) of each bit of the third field may indicate no event triggered CSI report is required, and a second value (e.g., “1”) of each bit of the third field may indicate one event triggered CSI report configuration identifier. If the third field has a bitmap of “11”, it indicates two event triggered CSI report configuration identifiers. In this way, the third field indicates the event triggered CSI report configuration identifiers in a bitmap manner. One of the benefits of the third field is that the UE can be requested to provide aperiodic CSI report(s) and event triggered CSI report(s) by a same message (e.g. DCI)

[0096] In some example embodiments, when the third field indicates K event triggered CSI report configuration identifiers and the terminal device 202 supports transmitting a maximum of M event triggered CSI reports at the same time, the terminal device 202 may select M event triggered CSI reports to be reported from K event triggered CSI reports corresponding to the K event triggered CSI report configuration identifiers based on a priority order of the K event triggered CSI report configuration identifiers, wherein K and M are positive integer and K>M. That is because that the terminal device 202 may not supports transmitting so many event triggered CSI reports at the same time due to a limitation of capability. For example, if the third field indicates 3 event triggered CSI report configuration identifiers and the terminal device 202 only supports transmitting a maximum of 2 event triggered CSI reports at the same time, the terminal device 202 will select 2 event triggered CSI reports to be reported corresponding to the event triggered CSI report configuration identifiers with higher priority and would report the event triggered CSI report corresponding to the event triggered CSI report configuration identifiers with the lowest priority.

[0097] In some embodiments, when the first field is configured to be present in the DCI, a field size of the CSI request field may be configured based on a higher value between a number of event triggered reporting configurations and a number of aperiodic CSI reporting configurations that could be configured. For example, if the number of event triggered reporting configurations is 3 and the number of aperiodic CSI reporting configurations is 2, the field size of the CSI request field would be configured based on 3 (e.g., configured as 2 bits). Alternatively or additionally, when the first field is configured to be present in the DCI, a field size of the CSI request field may be configured based on a higher value between a highest event triggered reporting configuration identifier and a highest aperiodic CSI reporting configuration identifier that could be configured. For example, if the highest event triggered reporting configuration identifier is 3 and the highest aperiodic CSI reporting configuration identifier is 2, the field size of the CSI request field would be configured based on 3 (e.g., configured as 2 bits).

[0098] In some example embodiments, the at least one field may comprise a fourth field, which indicates at least one aperiodic CSI reporting configuration identifiers and / or at least one event triggered reporting configuration identifiers. In this way, the at least one aperiodic CSI reporting configuration identifiers and the at least one event triggered reporting configuration identifiers could be explicitly indicated using a same field / identifier space. The fourth field may be the CSI request field in the DCI. In some example embodiments, the event triggered reporting may share the same configurations (e.g. configuration identifiers) as the aperiodic CSI reporting configurations.

[0099] In some example embodiments, a field size of the fourth field may be determined based on a sum of a number of aperiodic CSI reporting configuration identifiers and a number of event triggered reporting configuration identifiers that could be configured. For example, if the number of aperiodic CSI reporting configuration identifiers is 3 and the number of event triggered reporting configuration identifiers is 4, the field size of the fourth field would be configured based on 7 (e.g., configured as 3 bits).

[0100] Alternatively or additionally, a field size of the fourth field may be determined based on a highest reporting configuration identifier to be in the space of the fourth field. For example, if the highest reporting configuration identifier to be in the space of the fourth field is 7, the fourth field may have a length of 3 bits. The event triggered reporting configurations may have one-to-one correspondence with the event triggered reporting configuration identifiers.

[0101] In some example embodiments, the network device 204 respond to the terminal device 202 with the fourth field (e.g., a CSI request field) in the DCI which indicates event triggered reporting configuration(s) associated with the event(s) indicated by an uplink signal from the terminal device 202. The uplink signal may be a scheduling request (SR) or other signals mapped on a PUCCH.

[0102] In some example embodiments, the DCI may comprise a codepoint corresponding to an event indicated by an uplink signal from the terminal device 202 to the network device 204, and the terminal device 202 may consider the event as cleared based on receipt of the codepoint. The terminal device 202 may be configured with a plurality of events and the event triggered repot corresponding to each event should be reported via a dedicated signal resource. The codepoint may indicate an event ID of one event or a reporting configuration identifier of one event. In this way, the DCI could consider the event as cleared or acknowledged based on the received codepoint.

[0103] Alternatively or additionally, the DCI may comprise a codepoint indicating to clear all events of the terminal device 202. For example, the terminal device 202 may be configured with three events with IDs 0~2 and the corresponding signal resources, then the DCI may clear or acknowledge all the three events by sending a codepoint “11” to the terminal device 202.

[0104] In some example embodiments, if the terminal device 202 detects a non-zero value for the second field or the third field, it expects the CSI request field to be set as a value of zero and would not be expected to transmit any (aperiodic) report indicated by the CSI request field.

[0105] In some example embodiments, the DCI may comprise a DCI format for scheduling an uplink sharing channel, UL-SCH, for transmitting the at least one CSI report. In this way, the event triggered CSI report is able to be multiplexed on the UL-SCH. The DCI format may be used for scheduling UL-SCH allocation or uplink grant, e.g., DCI format 01 or DCI format 0 0.

[0106] In some example embodiments, the at least one field comprises an UL-SCH indicator, which indicates the terminal device 202 whether to multiplex uplink data transmission on an UL-SCH channel (e.g., a PUSCH) for transmitting the at least one CSI report. For example, if the UL-SCH indicator has a value of “0”, the terminal device 202 may be indicated not to multiplex uplink data transmission on the UL-SCH channel, and if the UL-SCH indicator has a value of “1”, the terminal device 202 may be indicated to multiplex uplink data transmission on the UL-SCH channel. In this way, the event triggered CSI reports are able to be transmitted quickly without the delay of uplink data encoding.

[0107] In some example embodiments, the terminal device 202 may determine whether the event triggered reporting is completed or acknowledged based on a message (e.g., DCI) from the network device 204 after transmitting the event triggered report(s) to the network device 204.

[0108] FIG. 3 illustrates an example signaling process 300 for event triggered beam reporting from a terminal device (for example, a terminal device 302 or a UE 302) to a network device (for example, a TRP 304 or a gNB 304) according to some other embodiments of the present disclosure. The terminal device 302 may refer to the terminal device 102 in FIG. 1 or the terminal device 202 in FIG.2, and the network device 304 may refer to the network device 104 in FIG. 1 or the network device 204 in FIG. 2.

[0109] At 310, the terminal device 302 may select an event from a plurality of events when the plurality of events occur within a time window. The time window may be predetermined by a protocol or the network device 304. In this way, when the plurality of events occur within in the time window (also could be considered as the plurality of events occur / happen at the same time), the terminal device 302 is able to select the event as needed for event triggered beam reporting.

[0110] At 320, the terminal device 302 may transmit, to a network device 304, an uplink signal corresponding to the selected event for requesting a resource of an uplink channel for transmitting beam reports (e.g., CSI, SINR or reference signal received power (RSRP) reports). At the same time, in a reverse direction, the network device 304 may receive, from the terminal device 302, the uplink signal corresponding to an event for requesting a resource of an uplink channel for transmitting CSI reports.

[0111] At 330, the terminal device 302 may receive, from the network device 304, a DO. At the same time, in a reverse direction, the network device 304 may transmit, to the terminal device 302, the DCI. The DCI schedules the resource of the uplink channel to the terminal device 302 and comprises at least one field capable of indicating information related to event triggered CSI reporting. In this way, the terminal device 302 could get a resource for beam reporting, and determine the event triggered reporting configurations and whether or not to transmit the event triggered CSI reports based on the at least one field.

[0112] At 340, the terminal device 302 may transmit, to the network device 304, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel. At the same time, in a reverse direction, the network device 304 may receive, from the terminal device 302, the event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel. In this way, the terminal device 302 is able to determine to transmit the event triggered beam report corresponding to which event to the network.

[0113] In some example embodiments, the selected event may be an event indicating switching to a new beam. For example, if there is one event indicating switching to a new beam and another event indicating measurement result of beam(s) are above a threshold occur at the same time, then the event indicating switching to a new beam may be selected and the corresponding event triggered CSI report would be reported to the network device 304. Alternatively or additionally, the selected event may be an event indicating potential beam switching to a new beam. For example, if there is an event indicating a potential new beam could be selected and another event occur at the same time, the event indicating a potential new beam could be selected would be selected and the corresponding event triggered CSI report would be reported to the network device 304. Alternatively or additionally, the selected event may be an event indicating a new beam having a beam measurement result better than a currently used beam. In other words, the selected event may be an event indicating a new beam having a better uplink beam metric. The beam measurement result (e.g., the CSI report) may be a downlink reference signal receiving power (RSRP) measurement result, e.g., layer-1 RSRP (LI-RSRP) measurement result. Alternatively or additionally, the selected event may be an event whose performance metric is the best. For example, the terminal device 302 may keep measuring or observing the performance metric (e.g., throughput performance metric) on an event after providing the event triggered CSI report for the event, if the performance metric of the event is the best later, the terminal device 302 may trigger reporting the event triggered CSI report for the event again. In this way, several specific manners for selecting the event to be reported have been provided.

[0114] In some example embodiments, the terminal device 302 may receive, from the network device 304, a configuration for configuring the terminal device 302 to support reporting different event triggered CSI reports corresponding to the plurality of events. In this way, the terminal device 302 could be configured as supporting or not supporting different event triggered CSI reports in a flexible manner.

[0115] In some example embodiments, the at least one field may comprise a first field, which indicates a CSI request field in the DCI is to be interpreted as indicating an information related to an aperiodic CSI request or an information related to at least one event triggered CSI report. Alternatively or additionally, the at least one field may comprise a second field, which indicates whether the terminal device 302 is configured to provide event triggered CSI reports. Alternatively or additionally, the at least one field may comprise a third field, which indicates at least one event triggered CSI report configuration identifier. Alternatively or additionally, the at least one field may comprise a fourth field, which indicates at least one aperiodic CSI reporting configuration identifiers and / or at least one event triggered reporting configuration identifiers. Alternatively or additionally, the at least one field may comprise an UL-SCH indicator, which indicates the terminal device 302 whether to multiplex uplink data transmission on an UL-SCH channel for transmitting at least one CSI report.

[0116] It should be noted that those embodiments described with reference FIG. 2 also apply for or could be combined with the embodiments described with reference FIG. 3 in a replaced or mixed manner, which are omitted here for brevity.

[0117] FIG. 4 illustrates an example signaling process 400 for event triggered beam reporting from a terminal device (for example, a terminal device 402 or a UE 402) to a network device (for example, a TRP 404 or a gNB 404) according to yet some other embodiments of the present disclosure. The terminal device 402 may refer to the terminal device 102 in FIG. 1, the terminal device 202 in FIG.2 or the terminal device 302 in FIG. 3, and the network device 404 may refer to the network device 104 in FIG. 1, the network device 204 in FIG. 2 or the network device 304 in FIG. 3.

[0118] At 410, the terminal device 402 may transmit, to the network device 404, an uplink signal for requesting a resource of an uplink channel for transmitting beam reports (e.g., CSI, SINR or reference signal received power (RSRP) reports). At the same time, in a reverse direction, the network device 404 may receive, from the terminal device 402, the uplink signal for requesting a resource of an uplink channel for transmitting CSI reports.

[0119] At 420, the terminal device 402 may receive, from the network device 404, a DCI. At the same time, in a reverse direction, the network device 404 may transmit, to the terminal device 402, the DCI. The DCI schedules the resource of the uplink channel to the terminal device 402 and comprises at least one field capable of indicating information related to event triggered CSI reporting. In this way, the terminal device 402 could get a resource for beam reporting, and determine the event triggered reporting configurations and whether or not to transmit the event triggered CSI reports based on the at least one field.

[0120] At 430, the terminal device 402 may select an event triggered reporting configuration from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations. The at least one field indicates the plurality of event triggered reporting configurations means that a plurality of events occur within a time window (at the same time). The time window may be predetermined by a protocol or the network device 404. In this way, when the plurality of events occur within in the time window (also could be considered as the plurality of events occur / happen at the same time), the terminal device 402 is able to select the event triggered reporting configuration as needed for event triggered beam reporting.

[0121] At 440, the terminal device 402 may transmit, to the network device 404, an event triggered CSI report corresponding to the selected event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel. At the same time, in a reverse direction, the network device 404 may transmit, to the terminal device 402, an event triggered CSI report corresponding to an event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel. In this way, the terminal device 402 is able to determine to transmit the event triggered beam report corresponding to which event triggered reporting configuration (i.e., corresponding to which event) to the network.

[0122] In some example embodiments, the selected event triggered reporting configuration may correspond to an event indicating switching to a new beam. For example, if there is an event triggered reporting configuration corresponding to an event indicating switching to a new beam and another event triggered reporting configuration corresponding to another event indicating measurement result of beam(s) are above a threshold occur at the same time, then the event triggered reporting configuration correspond to the event indicating switching to a new beam may be selected and the corresponding event triggered CSI report would be reported to the network device 404. Alternatively or additionally, the selected event triggered reporting configuration may correspond to an event indicating potential beam switching to a new beam. For example, if there is an event triggered reporting configuration corresponding to an event indicating a potential new beam could be selected and another event triggered reporting configuration corresponding to another event occur at the same time, the event triggered reporting configuration corresponding to the event indicating a potential new beam could be selected would be selected and the corresponding event triggered CSI report would be reported to the network device 404. Alternatively or additionally, an event triggered reporting configuration may correspond to an event indicating a new beam having a beam measurement result better than a currently used beam. In other words, the selected event triggered reporting configuration may correspond to an event indicating a new beam having a better uplink beam metric. The beam measurement result may be a downlink reference signal receiving power (RSRP) measurement result, eg., layer-1 RSRP (Ll-RSRP) measurement result. Alternatively or additionally, the selected event triggered reporting configuration may correspond to an event whose performance metric is the best. For example, the terminal device 402 may keep measuring or observing the performance metric (e.g., throughput performance metric) on an event after providing the event triggered CSI report for the event, if the performance metric of the event is the best later, the terminal device 402 may trigger reporting the event triggered CSI report for the event again. In this way, several specific manners for selecting the event triggered reporting configuration corresponding to the event to be reported have been provided.

[0123] In some example embodiments, the terminal device 402 may receive, from the network device 404, a configuration for configuring the terminal device 402 to support reporting different event triggered CSI reports corresponding to the plurality of events. In this way, the terminal device 402 could be configured as supporting or not supporting different event triggered CSI reports in a flexible manner.

[0124] In some example embodiments, the at least one field may comprise a first field, which indicates a CSI request field in the DCI is to be interpreted as indicating an information related to an aperiodic CSI request or an information related to at least one event triggered CSI report. Alternatively or additionally, the at least one field may comprise a second field, which indicates whether the terminal device 402 is configured to provide event triggered CSI reports. Alternatively or additionally, the at least one field may comprise a third field, which indicates at least one event triggered CSI report configuration identifier. Alternatively or additionally, the at least one field may comprise a fourth field, which indicates at least one aperiodic CSI reporting configuration identifiers and / or at least one event triggered reporting configuration identifiers. Alternatively or additionally, the at least one field may comprise an UL-SCH indicator, which indicates the terminal device 402 whether to multiplex uplink data transmission on an UL-SCH channel for transmitting at least one CSI report.

[0125] It should be noted that those embodiments described with reference FIG. 2 and FIG. 3 also apply for or could be combined with the embodiments described with reference FIG. 4 in a replaced or mixed manner, which are omitted here for brevity.

[0126] FIG. 5 illustrates a flowchart of an example method 500 implemented at a terminal device (for example, a terminal device 102, 202, 302 or 402) in accordance with some embodiments of the present disclosure. For ease of understanding, the method 500 will be described from the perspective of the terminal device 202 with reference to FIG. 2.

[0127] At block 510, the terminal device 202 transmits, to a network device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports. At block 520, the terminal device 202 receives, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device 202 and comprises at least one field capable of indicating information related to event triggered CSI reporting. At block 530, the terminal device 202 transmits, to the network device, at least one CSI report determined based on the at least one field on the resource of the uplink channel.

[0128] In some example embodiments, presence of the at least one field is configured by at least one radio resource control, RRC, signaling.

[0129] In some example embodiments, the at least one field comprises a first field, which indicates a CSI request field in the DCI is to be interpreted as indicating an information related to an aperiodic CSI request or an information related to at least one event triggered CSI report.

[0130] In some example embodiments, at least one of the following is satisfied: the information related to the aperiodic CSI request comprises a codepoint value for the aperiodic CSI request; or the information related to the at least one event triggered CSI report comprises at least one of: at least one event triggered reporting configuration identifier, at least one codepoint value associated with at least one event triggered reporting configuration identifier, or at least one uplink signal identifier codepoint value associated with at least one event triggered reporting configuration identifier.

[0131] In some example embodiments, the terminal device 202 is further caused to: determine the at least one event triggered reporting configuration identifier based on the CSI request field and the first field indicating the CSI request field is to be interpreted as the information related to at least one event triggered CSI report; and determine to report the at least one event triggered CSI report based on at least one event triggered reporting configuration indicated by the at least one event triggered reporting configuration identifier.

[0132] In some example embodiments, the at least one field comprises a second field, which indicates whether the terminal device 202 is configured to provide event triggered CSI reports.

[0133] In some example embodiments, the terminal device 202 is further caused to: determine to report the at least one event triggered CSI report based on the second field indicating the terminal device 202 is configured to provide event triggered CSI reports and a transmitted uplink signal associated with an event identifier.

[0134] In some example embodiments, the at least one field comprises a third field, which indicates at least one event triggered CSI report configuration identifier.

[0135] In some example embodiments, the third field has a length of N bits, and the third field indicates a codepoint, which indicates one event triggered CSI report configuration identifier in 2N-1 event triggered CSI report configuration identifiers or no event triggered CSI report is required, N is a positive integer.

[0136] In some example embodiments, the third field has a length of N bits, and each bit of the third field indicates one event triggered CSI report configuration identifier in N event triggered CSI report configuration identifiers or no event triggered CSI report is required, N is a positive integer.

[0137] In some example embodiments, the terminal device 202 is further caused to: when the third field indicates K event triggered CSI report configuration identifiers and the terminal device 202 supports transmitting a maximum of M event triggered CSI reports at the same time, select M event triggered CSI reports to be reported from K event triggered CSI reports corresponding to the K event triggered CSI report configuration identifiers based on a priority order of the K event triggered CSI report configuration identifiers, wherein K and M are positive integer and K>M.

[0138] In some example embodiments, a field size of the CSI request field is configured based on a higher value between a number of event triggered reporting configurations and a number of aperiodic CSI reporting configurations that could be configured.

[0139] In some example embodiments, a field size of the CSI request field is configured based on a higher value between a highest event triggered reporting configuration identifier and a highest aperiodic CSI reporting configuration identifier that could be configured.

[0140] In some example embodiments, the at least one field comprises a fourth field, which indicates at least one aperiodic CSI reporting configuration identifiers and / or at least one event triggered reporting configuration identifiers.

[0141] In some example embodiments, a field size of the fourth field is determined based on a sum of a number of aperiodic CSI reporting configuration identifiers and a number of event triggered reporting configuration identifiers that could be configured.

[0142] In some example embodiments, the DCI comprises a codepoint corresponding to an event indicated by an uplink signal from the terminal device 202 to the network device, and the terminal device 202 is further caused to: consider the event as cleared based on receipt of the codepoint.

[0143] In some example embodiments, the DCI comprises a codepoint indicating to clear all events of the terminal device 202.

[0144] In some example embodiments, the DCI comprises a DCI format for scheduling an uplink sharing channel, UL-SCH, for transmitting the at least one CSI report, the at least one field comprises an UL-SCH indicator, and the terminal device 202 is further caused to: determine, based on the UL-SCH indicator, whether to multiplex uplink data transmission on the UL-SCH.

[0145] FIG. 6 illustrates a flowchart of an example method 600 implemented at a network device (for example, a network device 104, 204, 304 or 404) in accordance with some embodiments of the present disclosure. For ease of understanding, the method 600 will be described from the perspective of the network device 204 with reference to FIG. 2.

[0146] At block 610, the network device 204 receives, from a terminal device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports. At block 620, the network device 204 transmits, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting. At block 630, the network device 204 receives, from the terminal device, at least one CSI report determined based on the at least one field on the resource of the uplink channel.

[0147] In some example embodiments, the at least one field comprises at least one of the following: a first field, which indicates a CSI request field in the DCI is to be interpreted as indicating an information related to an aperiodic CSI request or an information related to at least one event triggered CSI report; a second field, which indicates whether the terminal device is configured to provide event triggered CSI reports; a third field, which indicates at least one event triggered CSI report configuration identifier; a fourth field, which indicates at least one aperiodic CSI reporting configuration identifiers and / or at least one event triggered reporting configuration identifiers; or an UL-SCH indicator, which indicates the terminal device whether to multiplex uplink data transmission on an UL-SCH channel for transmitting the at least one CSI report.

[0148] It should be noted that those embodiments described with reference FIG. 5 for the terminal device side also apply for or could be combined with the embodiments described with reference FIG. 6 for the network device side, which are omitted here for brevity.

[0149] FIG. 7 illustrates a flowchart of an example method 700 implemented at a terminal device (for example, a terminal device 102, 202, 302 or 402) in accordance with some embodiments of the present disclosure. For ease of understanding, the method 700 will be described from the perspective of the terminal device 302 with reference to FIG. 3.

[0150] At block 710, the terminal device 302 selects an event from a plurality of events when the plurality of events occur within a time window. At block 720, the terminal device 302 transmits, to a network device, an uplink signal corresponding to the selected event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports. At block 730, the terminal device 302 receives, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device 302 and comprises at least one field capable of indicating information related to event triggered CSI reporting. At block 740, the terminal device 302 transmits, to the network device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

[0151] In some example embodiments, the selected event is at least one of the following: an event indicating switching to a new beam; an event indicating potential beam switching to a new beam; an event indicating a new beam having a beam measurement result better than a currently used beam; or an event whose performance metric is the best.

[0152] In some example embodiments, the terminal device 302 is further caused to: receive, from the network device, a configuration for configuring the terminal device 302 to support reporting different event triggered CSI reports corresponding to the plurality of events.

[0153] In some example embodiments, the at least one field comprises at least one of the following: a first field, which indicates a CSI request field in the DCI is to be interpreted as indicating an information related to an aperiodic CSI request or an information related to at least one event triggered CSI report; a second field, which indicates whether the terminal device 302 is configured to provide event triggered CSI reports; a third field, which indicates at least one event triggered CSI report configuration identifier; a fourth field, which indicates at least one aperiodic CSI reporting configuration identifiers and / or at least one event triggered reporting configuration identifiers; or an UL-SCH indicator, which indicates the terminal device 302 whether to multiplex uplink data transmission on an UL-SCH channel for transmitting at least one CSI report.

[0154] It should be noted that those embodiments described with reference FIG. 5 or FIG. 6 also apply for or could be combined with the embodiments described with reference FIG. 7, which are omitted here for brevity.

[0155] FIG. 8 illustrates a flowchart of an example method 800 implemented at a terminal device (for example, a terminal device 102, 202, 302 or 402) in accordance with some embodiments of the present disclosure. For ease of understanding, the method 800 will be described from the perspective of the terminal device 402 with reference to FIG. 4.

[0156] At block 810, the terminal device 402 transmits, to a network device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports. At block 820, the terminal device 402 receives, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device 402 and comprises at least one field capable of indicating information related to event triggered CSI reporting. At block 830, the terminal device 402 selects an event triggered reporting configuration from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations. At block 840, the terminal device 402 transmits, to the network device, an event triggered CSI report corresponding to the selected event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel.

[0157] In some example embodiments, the selected event triggered reporting configuration corresponds to at least one of the following: an event indicating switching to a new beam; an event indicating potential beam switching to a new beam; an event indicating a new beam having a beam measurement result better than a currently used beam; or an event whose performance metric is the best.

[0158] In some example embodiments, the terminal device 402 is further caused to: receive, from the network device, a configuration for configuring the terminal device 402 to support reporting different event triggered CSI reports corresponding to the plurality of events.

[0159] In some example embodiments, the at least one field comprises at least one of the following: a first field, which indicates a CSI request field in the DCI is to be interpreted as indicating an information related to an aperiodic CSI request or an information related to at least one event triggered CSI report; a second field, which indicates whether the terminal device 402 is configured to provide event triggered CSI reports; a third field, which indicates at least one event triggered CSI report configuration identifier; a fourth field, which indicates at least one aperiodic CSI reporting configuration identifiers and / or at least one event triggered reporting configuration identifiers; or an UL-SCH indicator, which indicates the terminal device 402 whether to multiplex uplink data transmission on an UL-SCH channel for transmitting at least one CSI report.

[0160] It should be noted that those embodiments described with reference FIG. 5 to FIG. 7 also apply for or could be combined with the embodiments described with reference FIG. 8, which are omitted here for brevity.

[0161] FIG. 9 illustrates a flowchart of an example method 900 implemented at a network device (for example, a network device 104, 204, 304 or 404) in accordance with some embodiments of the present disclosure. For ease of understanding, the method 900 will be described from the perspective of the network device 304 with reference to FIG. 3.

[0162] At block 910, the network device 304 receives, from a terminal device, an uplink signal corresponding to an event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports, wherein the event is selected from a plurality of events when the plurality of events occur within a time window. At block 920, the network device 304 transmits, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting. At block 930, the network device 304 receives, from the terminal device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

[0163] In some example embodiments, the selected event is at least one of the following: an event indicating switching to a new beam; an event indicating potential beam switching to a new beam; an event indicating a new beam having a beam measurement result better than a currently used beam; or an event whose performance metric is the best.

[0164] In some example embodiments, the network device 304 is further caused to: transmit, to the terminal device, a configuration for configuring the terminal device to support reporting different event triggered CSI reports corresponding to the plurality of events.

[0165] In some example embodiments, the at least one field comprises at least one of the following: a first field, which indicates a CSI request field in the DCI is to be interpreted as indicating an information related to an aperiodic CSI request or an information related to at least one event triggered CSI report; a second field, which indicates whether the terminal device is configured to provide event triggered CSI reports; a third field, which indicates at least one event triggered CSI report configuration identifier; a fourth field, which indicates at least one aperiodic CSI reporting configuration identifiers and / or at least one event triggered reporting configuration identifiers; or an UL-SCH indicator, which indicates the terminal device whether to multiplex uplink data transmission on an UL-SCH channel for transmitting at least one CSI report.

[0166] It should be noted that those embodiments described with reference FIG. 5 or FIG. 6 also apply for or could be combined with the embodiments described with reference FIG. 9, which are omitted here for brevity.

[0167] FIG. 10 illustrates a flowchart of an example method 1000 implemented at a network device (for example, a network device 104, 204, 304 or 404) in accordance with some embodiments of the present disclosure. For ease of understanding, the method 1000 will be described from the perspective of the network device 404 with reference to FIG. 4.

[0168] At block 1010, the network device 404 receives, from a terminal device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports. At block 1020, the network device 404 transmits, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting. At block 1030, the network device 404 transmits, to the terminal device, an event triggered CSI report corresponding to an event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel, wherein the event triggered reporting configuration is selected from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations.

[0169] In some example embodiments, the selected event triggered reporting configuration corresponds to at least one of the following: an event indicating switching to a new beam; an event indicating potential beam switching to a new beam; an event indicating a new beam having a beam measurement result better than a currently used beam; or an event whose performance metric is the best.

[0170] In some example embodiments, the network device 404 is further caused to: transmit, to the terminal device, a configuration for configuring the terminal device to support reporting different event triggered CSI reports corresponding to the plurality of events.

[0171] In some example embodiments, the at least one field comprises at least one of the following: a first field, which indicates a CSI request field in the DCI is to be interpreted as indicating an information related to an aperiodic CSI request or an information related to at least one event triggered CSI report; a second field, which indicates whether the terminal device is configured to provide event triggered CSI reports; a third field, which indicates at least one event triggered CSI report configuration identifier; a fourth field, which indicates at least one aperiodic CSI reporting configuration identifiers and / or at least one event triggered reporting configuration identifiers; or an UL-SCH indicator, which indicates the terminal device whether to multiplex uplink data transmission on an UL-SCH channel for transmitting at least one CSI report.

[0172] It should be noted that those embodiments described with reference FIG. 5, FIG. 6 or FIG. 8 also apply for or could be combined with the embodiments described with reference FIG. 10, which are omitted here for brevity.

[0173] By implementing the embodiments described with reference to FIG. 1 to FIG. 10, the UE could be indicated whether to transmit the event triggered beam reports or other kinds of beam reports, and it also could be determined the event triggered beam report corresponding to which event is to be transmitted to the network when there are multiple events occurring at the same time (or within a time window). Thus, it improves the efficiency and accuracy of the event triggered beam reporting.

[0174] In some example embodiments, an apparatus (for example, the terminal device 202) capable of performing the method 500 may comprise means for performing the respective steps of the method 500. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.

[0175] In some example embodiments, the apparatus may comprise means for transmitting, to a network device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; means for receiving, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and means for transmitting, to the network device, at least one CSI report determined based on the at least one field on the resource of the uplink channel. In some example embodiments, the apparatus may comprise means for performing other embodiments described with reference to FIG. 5.

[0176] In some example embodiments, an apparatus (for example, the network device 204) capable of performing the method 600 may comprise means for performing the respective steps of the method 600. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.

[0177] In some example embodiments, the apparatus may comprise means for receiving, from a terminal device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; means for transmitting, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and means for receiving, from the terminal device, at least one CSI report determined based on the at least one field on the resource of the uplink channel. In some example embodiments, the apparatus may comprise means for performing other embodiments described with reference to FIG. 6.

[0178] In some example embodiments, an apparatus (for example, the terminal device 302) capable of performing the method 700 may comprise means for performing the respective steps of the method 700. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.

[0179] In some example embodiments, the apparatus may comprise means for selecting an event from a plurality of events when the plurality of events occur within a time window; means for transmitting, to a network device, an uplink signal corresponding to the selected event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; means for receiving, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to a terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and means for transmitting, to the network device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel. In some example embodiments, the apparatus may comprise means for performing other embodiments described with reference to FIG. 7.

[0180] In some example embodiments, an apparatus (for example, the terminal device 402) capable of performing the method 800 may comprise means for performing the respective steps of the method 800. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.

[0181] In some example embodiments, the apparatus may comprise means for transmitting, to a network device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; means for receiving, from the network device, a downlink control information, DO, the DO schedules the resource of the uplink channel to a terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; means for selecting an event triggered reporting configuration from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations; and means for transmitting, to the network device, an event triggered CSI report corresponding to the selected event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel. In some example embodiments, the apparatus may comprise means for performing other embodiments described with reference to FIG. 8.

[0182] In some example embodiments, an apparatus (for example, the network device 304) capable of performing the method 900 may comprise means for performing the respective steps of the method 900. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.

[0183] In some example embodiments, the apparatus may comprise means for receiving, from a terminal device, an uplink signal corresponding to an event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports, wherein the event is selected from a plurality of events when the plurality of events occur within a time window; means for transmitting, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and means for receiving, from the terminal device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel. In some example embodiments, the apparatus may comprise means for performing other embodiments described with reference to FIG. 9.

[0184] In some example embodiments, an apparatus (for example, the network device 404) capable of performing the method 1000 may comprise means for performing the respective steps of the method 1000. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.

[0185] In some example embodiments, the apparatus may comprise means for receiving, from a terminal device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports; means for transmitting, to the terminal device, a downlink control information, DO, the DO schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and means for transmitting, to the terminal device, an event triggered CSI report corresponding to an event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel, wherein the event triggered reporting configuration is selected from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations. In some example embodiments, the apparatus may comprise means for performing other embodiments described with reference to FIG. 10.

[0186] FIG. 11 illustrates an example simplified block diagram of a device 1100 that is suitable for implementing embodiments of the present disclosure. The device 1100 may be provided to implement a communication device or a network element, for example, the terminal device 102, 202, 302 or 402, the network device 104, 204, 304 or 404 as shown in FIG. 1 to FIG. 4. As shown, the device 1100 includes one or more processors 1110, one or more memories 1120 may couple to the processor 1110, and one or more communication modules 1140 may couple to the processor 1110.

[0187] The communication module 1140 is for bidirectional communications. The communication module 1140 has at least one antenna to facilitate communication. The communication interface may represent any interface that is necessary for communication with other network elements, for example the communication interface may be wireless or wireline to other network elements, or software based interface for communication.

[0188] The processor 1110 may be of any type suitable to the local technical network and may include one or more of the following: general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 1100 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.

[0189] The memory 1120 may include one or more non-volatile memories and one or more volatile memories. Examples of the non-volatile memories include, but are not limited to, a read only memory (ROM) 1124, an electrically programmable read only memory (EPROM), a flash memory, a hard disk, a compact disc (CD), a digital video disk (DVD), and other magnetic storage and / or optical storage. Examples of the volatile memories include, but are not limited to, a random access memory (RAM) 1122 and other volatile memories that will not last in the power-down duration.

[0190] A computer program 1130 includes computer executable instructions that are executed by the associated processor 1110. The program 1130 may be stored in the ROM 1124. The processor 1110 may perform any suitable actions and processing by loading the program 1130 into the RAM 1122.

[0191] The embodiments of the present disclosure may be implemented by means of the program so that the device 1100 may perform any process of the disclosure as discussed with reference to FIG. 1 or FIG. 10. The embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.

[0192] In some example embodiments, the program 1130 may be tangibly contained in a computer readable medium which may be included in the device 1100 (such as in the memory 1120) or other storage devices that are accessible by the device 1100. The device 1100 may load the program 1130 from the computer readable medium to the RAM 1122 for execution. The computer readable medium may include any types of tangible non-volatile storage, such as ROM, EPROM, a flash memory, a hard disk, CD, DVD, and the like. FIG. 12 shows an example of the computer readable medium 1200 in form of CD or DVD. The computer readable medium has the program 1130 stored thereon.

[0193] Generally, various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representations, it is to be understood that the block, apparatus, system, technique or method described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.

[0194] The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium. The computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the methods 200 to 1000 as described above with reference to FIG. 2 to FIG. 10. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or split between program modules as desired in various embodiments. Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.

[0195] Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.

[0196] In the context of the present disclosure, the computer program codes or related data may be carried by any suitable carrier to enable the device, apparatus or processor to perform various processes and operations as described above. Examples of the carrier include a signal, computer readable medium, and the like.

[0197] The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the computer readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. The term “non-transitory,” as used herein, is a limitation of the medium itself (i.e., tangible, not a signal) as opposed to a limitation on data storage persistency (e.g., RAM vs. ROM).

[0198] Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are contained in the above discussions, these should not be construed as limitations on the scope of the present disclosure, but rather as descriptions of features that may be specific to particular embodiments. Certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable sub-combination.

[0199] Although the present disclosure has been described in languages specific to structural features and / or methodological acts, it is to be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims

1. A terminal device comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the terminal device at least to:select an event from a plurality of events when the plurality of events occur within a time window;transmit, to a network device, an uplink signal corresponding to the selected event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports;receive, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; andtransmit, to the network device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

2. The terminal device of claim 1, wherein the selected event is at least one of the following:an event indicating switching to a new beam;an event indicating potential beam switching to a new beam;an event indicating a new beam having a beam measurement result better than a currently used beam; oran event whose performance metric is the best.

3. The terminal device of claim 1 or 2, wherein the terminal device is further caused to:receive, from the network device, a configuration for configuring the terminal device to support reporting different event triggered CSI reports corresponding to the plurality of events.

4. The terminal device of any of claims 1 to 3, wherein the at least one field comprises at least one of the following:a first field, which indicates a CSI request field in the DCI is to be interpreted as indicating an information related to an aperiodic CSI request or an information related to at least one event triggered CSI report;a second field, which indicates whether the terminal device is configured to provide event triggered CSI reports;a third field, which indicates at least one event triggered CSI report configuration identifier;a fourth field, which indicates at least one aperiodic CSI reporting configuration identifiers and / or at least one event triggered reporting configuration identifiers; oran UL-SCH indicator, which indicates the terminal device whether to multiplex uplink data transmission on an UL-SCH channel for transmitting at least one CSI report.

5. A terminal device comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the terminal device at least to:transmit, to a network device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports;receive, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting;select an event triggered reporting configuration from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations; andtransmit, to the network device, an event triggered CSI report corresponding to the selected event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel.

6. The terminal device of claim 5, wherein the selected event triggered reporting configuration corresponds to at least one of the following:an event indicating switching to a new beam;an event indicating potential beam switching to a new beam;an event indicating a new beam having a beam measurement result better than a currently used beam; oran event whose performance metric is the best.

7. The terminal device of claim 5 or 6, wherein the terminal device is further caused to:receive, from the network device, a configuration for configuring the terminal device to support reporting different event triggered CSI reports corresponding to the plurality of events.

8. The terminal device of any of claims 5 to 7, wherein the at least one field comprises at least one of the following:a first field, which indicates a CSI request field in the DO is to be interpreted as indicating an information related to an aperiodic CSI request or an information related to at least one event triggered CSI report;a second field, which indicates whether the terminal device is configured to provide event triggered CSI reports;a third field, which indicates at least one event triggered CSI report configuration identifier;a fourth field, which indicates at least one aperiodic CSI reporting configuration identifiers and / or at least one event triggered reporting configuration identifiers; oran UL-SCH indicator, which indicates the terminal device whether to multiplex uplink data transmission on an UL-SCH channel for transmitting at least one CSI report.

9. A network device comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the network device at least to:receive, from a terminal device, an uplink signal corresponding to an event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports, wherein the event is selected from a plurality of events when the plurality of events occur within a time window;transmit, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; andreceive, from the terminal device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

10. The network device of claim 9, wherein the selected event is at least one of the following:an event indicating switching to a new beam;an event indicating potential beam switching to a new beam;an event indicating a new beam having a beam measurement result better than a currently used beam; oran event whose performance metric is the best.

11. The network device of claim 9 or 10, wherein the network device is further caused to:transmit, to the terminal device, a configuration for configuring the terminal device to support reporting different event triggered CSI reports corresponding to the plurality of events.

12. The network device of any of claims 9 to 11, wherein the at least one field comprises at least one of the following:a first field, which indicates a CSI request field in the DO is to be interpreted as indicating an information related to an aperiodic CSI request or an information related to at least one event triggered CSI report;a second field, which indicates whether the terminal device is configured to provide event triggered CSI reports;a third field, which indicates at least one event triggered CSI report configuration identifier;a fourth field, which indicates at least one aperiodic CSI reporting configuration identifiers and / or at least one event triggered reporting configuration identifiers; oran UL-SCH indicator, which indicates the terminal device whether to multiplex uplink data transmission on an UL-SCH channel for transmitting at least one CSI report.

13. A network device comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the network device at least to:receive, from a terminal device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports;transmit, to the terminal device, a downlink control information, DCI, the DO schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; andtransmit, to the terminal device, an event triggered CSI report corresponding to an event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel, wherein the event triggered reporting configuration is selected from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations.

14. The network device of claim 13, wherein the selected event triggered reporting configuration corresponds to at least one of the following:an event indicating switching to a new beam;an event indicating potential beam switching to a new beam;an event indicating a new beam having a beam measurement result better than a currently used beam; oran event whose performance metric is the best.

15. The network device of claim 13 or 14, wherein the network device is further caused to:transmit, to the terminal device, a configuration for configuring the terminal device to support reporting different event triggered CSI reports corresponding to the plurality of events.

16. The network device of any of claims 13 to 15, wherein the at least one field comprises at least one of the following:a first field, which indicates a CSI request field in the DCI is to be interpreted as indicating an information related to an aperiodic CSI request or an information related to at least one event triggered CSI report;a second field, which indicates whether the terminal device is configured to provide event triggered CSI reports;a third field, which indicates at least one event triggered CSI report configuration identifier;a fourth field, which indicates at least one aperiodic CSI reporting configuration identifiers and / or at least one event triggered reporting configuration identifiers; oran UL-SCH indicator, which indicates the terminal device whether to multiplex uplink data transmission on an UL-SCH channel for transmitting at least one CSI report.

17. A method compri sing:selecting an event from a plurality of events when the plurality of events occur within a time window;transmitting, to a network device, an uplink signal corresponding to the selected event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports;receiving, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to a terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; andtransmitting, to the network device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

18. A method compri sing:transmitting, to a network device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports;receiving, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to a terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting;selecting an event triggered reporting configuration from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations; andtransmitting, to the network device, an event triggered CSI report corresponding to the selected event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel.

19. A method compri sing:receiving, from a terminal device, an uplink signal corresponding to an event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports, wherein the event is selected from a plurality of events when the plurality of events occur within a time window;transmitting, to the terminal device, a downlink control information, DCI, the DO schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; andreceiving, from the terminal device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

20. A method comprising:receiving, from a terminal device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports;transmitting, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; andtransmitting, to the terminal device, an event triggered CSI report corresponding to an event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel, wherein the event triggered reporting configuration is selected from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations.

21. An apparatus comprising:means for selecting an event from a plurality of events when the plurality of events occur within a time window;means for transmitting, to a network device, an uplink signal corresponding to the selected event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports;means for receiving, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to a terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; andmeans for transmitting, to the network device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

22. An apparatus comprising:means for transmitting, to a network device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports;means for receiving, from the network device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to a terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting;means for selecting an event triggered reporting configuration from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations; andmeans for transmitting, to the network device, an event triggered CSI report corresponding to the selected event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel.

23. An apparatus comprising:means for receiving, from a terminal device, an uplink signal corresponding to an event for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports, wherein the event is selected from a plurality of events when the plurality of events occur within a time window;means for transmitting, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; andmeans for receiving, from the terminal device, an event triggered CSI report corresponding to the selected event and determined based on the at least one field on the resource of the uplink channel.

24. An apparatus comprising:means for receiving, from a terminal device, an uplink signal for requesting a resource of an uplink channel for transmitting channel state information, CSI, reports;means for transmitting, to the terminal device, a downlink control information, DCI, the DCI schedules the resource of the uplink channel to the terminal device and comprises at least one field capable of indicating information related to event triggered CSI reporting; and means for transmitting, to the terminal device, an event triggered CSI report 5 corresponding to an event triggered reporting configuration and determined based on the at least one field on the resource of the uplink channel, wherein the event triggered reporting configuration is selected from a plurality of event triggered reporting configurations when the at least one field indicates the plurality of event triggered reporting configurations.10 25. A non-transitory computer readable medium comprising program instructionsstored thereon for performing the method of any of claims 17 to 20.

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