WO2024183344A1

WO2024183344A1 - Configuration for channel state information reference signal

Info

Publication number: WO2024183344A1
Application number: PCT/CN2023/133644
Authority: WO
Inventors: Yinghao ZHANG; Bingchao LIU; Hongmei Liu
Original assignee: Lenovo Beijing Ltd
Current assignee: Lenovo Beijing Ltd
Priority date: 2023-11-23
Filing date: 2023-11-23
Publication date: 2024-09-12
Anticipated expiration: 2026-05-23

Abstract

Various aspects of the present disclosure relate to configurations for channel state information reference signals (CSI-RSs). In an aspect, a UE receives, from a network device, a CSI-RS resource configuration associated with a resource set. The UE receives, from the network device, a transmission configuration associated with the resource set. The UE receives, from the network device, CSI-RSs on the plurality of resource sets. In this way, the resource set may be utilized for CSI-RS transmissions based on the transmission configuration. The flexibility of CSI-RS transmissions may thus be improved.

Description

CONFIGURATION FOR CHANNEL STATE INFORMATION REFERENCE SIGNAL

TECHNICAL FIELD

The present disclosure relates to wireless communications, and more specifically to a user equipment (UE) , a network device, processors for wireless communication, methods, and non-transitory computer readable media for configurations for channel state information reference signals (CSI-RSs) .

BACKGROUND

A wireless communications system may include one or multiple network communication devices, such as base stations, which may be otherwise known as an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. Each network communication devices, such as a base station may support wireless communications for one or multiple user communication devices, which may be otherwise known as user equipment (UE) , or other suitable terminology. The wireless communications system may support wireless communications with one or multiple user communication devices by utilizing resources of the wireless communication system (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) . Additionally, the wireless communications system may support wireless communications across various radio access technologies including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) radio access technology, among other suitable radio access technologies beyond 5G (e.g., sixth generation (6G) ) .

In wireless communication networks, understanding and correctly estimating the channel between a UE and a base station (e.g., a gNB) is important for efficient and effective wireless communications. In order to correctly estimate the downlink (DL) channel conditions, the gNB may transmit a reference signal, e.g., a CSI-RS, to the UE for DL channel measurement, and the UE may report (e.g., feedback) information about channel measurement, e.g., CSI, to the gNB. With this DL channel measurement, the gNB is able to select appropriate communication parameters to efficiently and effectively perform wireless data communication with the UE. To meet the various improvements and requirements that accompany the development of wireless communication technology, further study on configurations for CSI-RSs is still needed.

SUMMARY

The present disclosure relates to methods, apparatuses, and systems that support configurations for CSI-RSs. By providing a CSI-RS resource configuration associated with a plurality of resource sets and performing CSI-RS transmissions on the plurality of resource sets or by providing a CSI-RS resource configuration and a transmission configuration associated with a resource set and performing CSI-RS transmissions on the resource set based on the transmission configuration, the flexibility of CSI-RS transmissions may be improved.

In a first aspect of the solution, a UE receives, from a network device, a channel state information reference signal (CSI-RS) resource configuration associated with a plurality of resource sets. The UE receives, from the network device, CSI-RSs on the plurality of resource sets. In this way, multiple resource sets may be utilized for CSI-RS transmissions. The flexibility of CSI-RS transmissions may thus be improved.

In some implementations of the methods and apparatuses described herein, the time domain behavior of CSI-RS resources within the plurality of resource sets is configured to be periodic or semi-persistent. The plurality of resource sets have a same periodicity and different time domain offsets.

In some implementations of the methods and apparatuses described herein, the plurality of resource sets are associated with at least one of the following: a same list of transmission control indicator (TCI) state; or a same list of quasi-colocation type D (QCL-TypeD) indication.

Some implementations of the method and apparatuses described herein may further include: receiving, from the network device, an indication for activating one of the plurality of resource sets, and determining that the plurality of resource sets are activated based on the indication.

Some implementations of the method and apparatuses described herein may further include: receiving, from the network device, an indication of the CSI-RS resource configuration, and determining that the plurality of resource sets are activated based on the indication.

Some implementations of the method and apparatuses described herein may further include: transmitting, to the network device, a request for activating the CSI-RS resource configuration. The request includes one of the following: an indication of a model for a CSI prediction or a beam prediction associated with the CSI-RS resource configuration; an indication of a CSI report configuration associated with the CSI-RS resource configuration; or an indication of the CSI-RS resource configuration.

Some implementations of the method and apparatuses described herein may further include: prior to receiving the CSI-RS resource configuration, transmitting, to the network device, an indication of at least one measurement and prediction pattern. Each of the at least one measurement and prediction pattern is associated with a respective model for a CSI prediction or a beam prediction.

In a second aspect of the solution, a UE receives, from a network device, a channel state information reference signal (CSI-RS) resource configuration associated with a resource set. The UE receives, from the network device, a transmission configuration associated with the resource set. The UE receives, from the network device, CSI-RSs on the resource set based on the transmission configuration. In this way, the resource set may be utilized for CSI-RS transmissions based on the transmission configuration. The flexibility of CSI-RS transmissions may thus be improved.

In some implementations of the methods and apparatuses described herein, the resource set includes a plurality of CSI-RS resources, and the transmission configuration is indicative of at least one time interval between two adjacent CSI-RS resources of the resource set or between two adjacent groups of CSI-RS resources of the resource set.

In some implementations of the methods and apparatuses described herein, receiving the CSI-RSs includes: receiving, from the network device, the CSI-RSs on the resource set at a plurality of occasions for transmission repetitions. The transmission configuration is indicative of at least one offset from a start point of a first occasion in the plurality of occasions. The first occasion is associated with a periodicity of the resource set and a time domain offset of the resource set. At least one occasion in the plurality of occasions subsequent to the first occasion is associated with the first occasion and the at least one offset.

In some implementations of the methods and apparatuses described herein, receiving the CSI-RSs includes: receiving, from the network device, the CSI-RSs on the resource set at a plurality of occasions for transmission repetitions. The transmission configuration is indicative of at least one offset from a start point of a previous occasion in the plurality of occasions. A first occasion is associated with a periodicity of the resource set and a time domain offset of the resource set. At least one occasion in the plurality of occasions subsequent to the first occasion is associated with the previous occasion and the at least one offset.

In some implementations of the methods and apparatuses described herein, receiving the CSI-RSs includes: receiving, from the network device, the CSI-RSs on the resource set at a plurality of occasions for transmission repetitions. The transmission configuration is indicative of a plurality of offsets from a start point of a transmission period comprising the plurality of occasions. The plurality of occasions are associated with a periodicity of the resource set, a time domain offset of the resource set and the plurality of offsets.

In some implementations of the methods and apparatuses described herein, the transmission configuration includes: an identifier (ID) of the resource set; and an ID of a list of the offsets. The list is one among at least one pre-configured list.

In some implementations of the methods and apparatuses described herein, the transmission configuration includes: an ID of the resource set; the number of the occasions; and the offsets.

In some implementations of the methods and apparatuses described herein, the transmission configuration includes: an ID of the resource set; the number of the offsets; and the offsets.

In some implementations of the methods and apparatuses described herein, the transmission configuration includes: an ID of the resource set; and a fixed number of offset values. The offsets correspond to offsets values with valid values among the fixed number of offset values. In the case that the number of the offsets is smaller than the fixed number, remaining offset values have invalid values.

In some implementations of the methods and apparatuses described herein, the transmission configuration further includes: an ID of a list of transmission control indicator (TCI) state for the CSI-RSs applied to the transmission repetitions.

In some implementations of the methods and apparatuses described herein, receiving the CSI-RSs includes: receiving, from the network device, the CSI-RSs on a resource set burst for transmission repetitions, the resource set burst is based on the transmission configuration. The transmission configuration includes: a periodicity of the resource set burst, a time domain offset of the resource set burst, an ID of the resource set, a repetition number of the resource set, and a repetition period of the resource set.

In some implementations of the methods and apparatuses described herein, the transmission repetitions are associated with at least one of the following: a same antenna port configuration; a same resource element (RE) location; a same list of TCI state; or a same list of quasi-colocation type D (QCL-TypeD) indication.

In some implementations of the methods and apparatuses described herein, a transmission of the CSI-RS resource configuration and the transmission configuration includes one of the following: the CSI-RS resource configuration and the transmission configuration being carried in a radio resource control (RRC) signaling; the transmission configuration being carried in a medium access control (MAC) control element (CE) for activating the resource set; or the CSI-RS resource configuration and the transmission configuration being carried in a RRC signaling and the transmission configuration is updated via a MAC CE.

In some implementations of the methods and apparatuses described herein, receiving the CSI-RSs includes: receiving, from the network device, the CSI-RSs on the resource set at a plurality of transmission occasions in a transmission window. The transmission configuration includes: a periodicity of the transmission window, a time length of the transmission window, and a time interval between two neighboring transmission occasions among the plurality of transmission occasions in the transmission window.

In some implementations of the methods and apparatuses described herein, the transmission window starts at a first time instance with an offset from a second time instance at which the transmission configuration is received, the offset is configured by the network device. The transmission window has the time length and is repeated with the periodicity. A first transmission occasion among the plurality of transmission occasions is a first occasion based on the CSI-RS resource configuration from the first time instance.

In some implementations of the methods and apparatuses described herein, receiving the CSI-RSs includes: receiving, from the network device, the CSI-RSs on the resource set at a plurality of transmission occasions. The plurality of transmission occasions are associated with a transmission pattern. The transmission pattern is associated with: a cycle length of the transmission pattern, the number of transmission occasions among the plurality of transmission occasions in the cycle length, and an occasion interval between two neighboring transmission occasions among the plurality of transmission occasions in the cycle length. The transmission configuration includes one of the following: the transmission pattern, or an ID of the transmission pattern. The transmission pattern is one among at least one pre-configured transmission pattern.

In some implementations of the methods and apparatuses described herein, the transmission pattern starts at a first time instance with an offset from a second time instance at which the transmission configuration is received. The offset is configured by the network device. The CSI-RSs are received on the resource set at the plurality of transmission occasions with the number and the occasion interval in the transmission pattern. The transmission pattern is repeated with the cycle length. A first transmission occasion among the plurality of transmission occasions is a first occasion based on the CSI-RS resource configuration from the first time instance.

In some implementations of the methods and apparatuses described herein, receiving the CSI-RSs includes: receiving, from the network device, the CSI-RSs on the resource set at a plurality of transmission occasions. The plurality of transmission occasions are associated with a skipping list. The skipping list includes the number of occasions to be skipped between two neighboring transmission occasions among the plurality of transmission occasions. The transmission configuration includes one of the following: the skipping list, or an ID of the skipping list. The skipping list is one among at least one pre-configured skipping list.

In some implementations of the methods and apparatuses described herein, receiving the CSI-RSs includes: receiving, from the network device, the CSI-RSs on the resource set based on the transmission configuration periodically before an updated transmission configuration or an indication to release the transmission configuration is received.

Some implementations of the method and apparatuses described herein may further include: prior to receiving the transmission configuration, transmitting, to the network device, a request for transmission configuration comprising one of the following: an indication of a model for a CSI prediction or a beam prediction; an indication of a CSI report configuration; or an indication of the CSI-RS resource configuration.

In a third aspect, a network device transmits, to a user equipment, a channel state information reference signal (CSI-RS) resource configuration associated with a plurality of resource sets. The network device transmits, to the user equipment, CSI-RSs on the plurality of resource sets. In this way, multiple resource sets may be utilized for CSI-RS transmissions. The flexibility of CSI-RS transmissions may thus be improved.

Some implementations of the method and apparatuses described herein may further include: transmitting, to the user equipment, an indication for activating one of the plurality of resource sets, and determining that the plurality of resource sets are activated based on the indication.

Some implementations of the method and apparatuses described herein may further include: transmitting, to the user equipment, an indication of the CSI-RS resource configuration, and determining that the plurality of resource sets are activated based on the indication.

Some implementations of the method and apparatuses described herein may further include: receiving, from the user equipment, a request for activating the CSI-RS resource configuration. The request includes one of the following: an indication of a model for a CSI prediction or a beam prediction associated with the CSI-RS resource configuration; an indication of a CSI report configuration associated with the CSI-RS resource configuration; or an indication of the CSI-RS resource configuration.

Some implementations of the method and apparatuses described herein may further include: prior to transmitting the CSI-RS resource configuration, receiving, from the user equipment, an indication of at least one measurement and prediction pattern. Each of the at least one measurement and prediction pattern is associated with a respective model for a CSI prediction or a beam prediction.

In a fourth aspect, a network device transmits, to a user equipment, a channel state information reference signal (CSI-RS) resource configuration associated with a resource set. The network device transmits, to the user equipment, a transmission configuration associated with the resource set. The network device transmits, to the user equipment, CSI-RSs on the resource set based on the transmission configuration. In this way, the resource set may be utilized for CSI-RS transmissions based on the transmission configuration. The flexibility of CSI-RS transmissions may thus be improved.

In some implementations of the methods and apparatuses described herein, transmitting the CSI-RSs includes: transmitting, to the user equipment, the CSI-RSs on the resource set at a plurality of occasions for transmission repetitions. The transmission configuration is indicative of at least one offset from a start point of a first occasion in the plurality of occasions. The first occasion is associated with a periodicity of the resource set and an time domain offset of the resource set. At least one occasion in the plurality of occasions subsequent to the first occasion is associated with the first occasion and the at least one offset.

In some implementations of the methods and apparatuses described herein, transmitting the CSI-RSs includes: transmitting, to the user equipment, the CSI-RSs on the resource set at a plurality of occasions for transmission repetitions. The transmission configuration is indicative of at least one offset from a start point of a previous occasion in the plurality of occasions. A first occasion is associated with a periodicity of the resource set and a time domain offset of the resource set. At least one occasion in the plurality of occasions subsequent to the first occasion is associated with the previous occasion and the at least one offset.

In some implementations of the methods and apparatuses described herein, transmitting the CSI-RSs includes: transmitting, to the user equipment, the CSI-RSs on the resource set at a plurality of occasions for transmission repetitions. The transmission configuration is indicative of a plurality of offsets from a start point of a transmission period comprising the plurality of occasions. The plurality of occasions are associated with a periodicity of the resource set, a time domain offset of the resource set and the plurality of offsets.

In some implementations of the methods and apparatuses described herein, transmitting the CSI-RSs includes: transmitting, to the user equipment, the CSI-RSs on a resource set burst for transmission repetitions, the resource set burst is based on the transmission configuration. The transmission configuration includes: a periodicity of the resource set burst, a time domain offset of the resource set burst, an ID of the resource set, a repetition number of the resource set, and a repetition period of the resource set.

In some implementations of the methods and apparatuses described herein, transmitting the CSI-RSs includes: transmitting, to the user equipment, the CSI-RSs on the resource set at a plurality of transmission occasions in a transmission window. The transmission configuration includes: a periodicity of the transmission window, a time length of the transmission window, and a time interval between two neighboring transmission occasions among the plurality of transmission occasions in the transmission window.

In some implementations of the methods and apparatuses described herein, the transmission window starts at a first time instance with an offset from a second time instance at which the transmission configuration is transmitted. The offset is configured by the user equipment. The transmission window has the time length and is repeated with the periodicity. A first transmission occasion among the plurality of transmission occasions is a first occasion based on the CSI-RS resource configuration from the first time instance.

In some implementations of the methods and apparatuses described herein, transmitting the CSI-RSs includes: transmitting, to the user equipment, the CSI-RSs on the resource set at a plurality of transmission occasions. The plurality of transmission occasions are associated with a transmission pattern. The transmission pattern is associated with: a cycle length of the transmission pattern, the number of transmission occasions among the plurality of transmission occasions in the cycle length, and an occasion interval between two neighboring transmission occasions among the plurality of transmission occasions in the cycle length. The transmission configuration includes one of the following: the transmission pattern, or an ID of the transmission pattern. The transmission pattern is one among at least one pre-configured transmission pattern.

In some implementations of the methods and apparatuses described herein, the transmission pattern starts at a first time instance with an offset from a second time instance at which the transmission configuration is transmitted. The offset is configured by the user equipment. The CSI-RSs are transmitted on the resource set at the plurality of transmission occasions with the number and the occasion interval in the transmission pattern. The transmission pattern is repeated with the cycle length. A first transmission occasion among the plurality of transmission occasions is a first occasion based on the CSI-RS resource configuration from the first time instance.

In some implementations of the methods and apparatuses described herein, transmitting the CSI-RSs includes: transmitting, to the user equipment, the CSI-RSs on the resource set at a plurality of transmission occasions. The plurality of transmission occasions are associated with a skipping list. The skipping list includes the number of occasions to be skipped between two neighboring transmission occasions among the plurality of transmission occasions. The transmission configuration includes one of the following: the skipping list, or an ID of the skipping list. The skipping list is one among at least one pre-configured skipping list.

In some implementations of the methods and apparatuses described herein, transmitting the CSI-RSs includes: transmitting, to the user equipment, the CSI-RSs on the resource set based on the transmission configuration periodically before an updated transmission configuration or an indication to release the transmission configuration is transmitted.

Some implementations of the method and apparatuses described herein may further include: receiving, from the user equipment, a request for transmission configuration comprising one of the following: an indication of a model for a CSI prediction or a beam prediction; an indication of a CSI report configuration; or an indication of the CSI-RS resource configuration. The transmission configuration is based on the request.

Some implementations of the method and apparatuses described herein may further include: receiving, from the user equipment, an indication of at least one measurement and prediction pattern. Each of the at least one measurement and prediction pattern is associated with a respective model for a CSI prediction or a beam prediction. The CSI-RS resource configuration is based on the at least one measurement and prediction pattern.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an example of a wireless communications system that supports configurations for CSI-RSs in accordance with aspects of the present disclosure.

FIG. 2 illustrates an example signaling chart of an example process that supports configurations for CSI-RSs in accordance with aspects of the present disclosure.

FIG. 3A illustrates an example of the content of a signaling to report the supported measurement and prediction pattern in accordance with aspects of the present disclosure.

FIG. 3B illustrates example diagrams of CSI-RS transmissions and associated reporting based on a plurality of resource sets in accordance with aspects of the present disclosure.

FIG. 4 illustrates another example signaling chart of an example process that supports configurations for CSI-RSs in accordance with aspects of the present disclosure.

FIG. 5 illustrates an example diagram of CSI-RS transmissions based on a resource set comprising multiple resources in accordance with aspects of the present disclosure.

FIG. 6A illustrates an example diagram of CSI-RS transmissions based on repetitions on a resource set in accordance with aspects of the present disclosure.

FIG. 6B illustrates an example structure of a MAC CE for a transmission configuration associated with repetitions on a resource set in accordance with aspects of the present disclosure.

FIG. 7 illustrates another example diagram of CSI-RS transmissions based on repetitions on a resource set in accordance with aspects of the present disclosure.

FIG. 8A illustrates an example structure of a MAC CE for a transmission configuration associated with a transmission window in accordance with aspects of the present disclosure.

FIG. 8B illustrates an example diagram of CSI-RS transmissions based on a transmission window in accordance with aspects of the present disclosure.

FIG. 9A illustrates an example structure of a MAC CE for a transmission configuration associated with a transmission pattern in accordance with aspects of the present disclosure.

FIG. 9B illustrates another example structure of a MAC CE for a transmission configuration associated with a transmission pattern in accordance with aspects of the present disclosure.

FIG. 9C illustrates an example diagram of CSI-RS transmissions based on a transmission pattern in accordance with aspects of the present disclosure.

FIG. 10A illustrates an example structure of a MAC CE for a transmission configuration associated with a skipping list in accordance with aspects of the present disclosure.

FIG. 10B illustrates another example structure of a MAC CE for a transmission configuration associated with a skipping list in accordance with aspects of the present disclosure.

FIG. 10C illustrates an example diagram of CSI-RS transmissions based on a skipping list in accordance with aspects of the present disclosure.

FIG. 11 illustrates an example of a device that supports configurations for CSI-RSs in accordance with aspects of the present disclosure.

FIG 12 illustrates an example of a processor that support configurations for CSI-RSs in accordance with aspects of the present disclosure.

FIGS. 13 through 16 illustrate flowcharts of methods that support configurations for CSI-RSs in accordance with aspects of the present disclosure.

DETAILED DESCRIPTION

Principles of the present disclosure will now be described with reference to some 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.

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 this disclosure belongs.

References in the present disclosure to “one embodiment, ” “an example embodiment, ” “an embodiment, ” “some embodiments, ” and the like indicate that the embodiment (s) 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 do not necessarily refer to the same embodiment (s) . 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.

It shall be understood that although the terms “first” and “second” or the like 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 element. For example, a first element could also be termed as a second element, and similarly, a second element could also be termed as a first element, without departing from the scope of embodiments. As used herein, the term “and/or” includes any and all combinations of one or more of the listed terms.

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. For example, the term “includes” and its variants are to be read as open terms that mean “includes, but is not limited to. ” The term “based on” is to be read as “based at least in part on. ” The term “one embodiment” and “an embodiment” are to be read as “at least one embodiment. ” The term “another embodiment” is to be read as “at least one other embodiment. ” The use of an expression such as “A and/or B” can mean either “only A” or “only B” or “both A and B. ” Other definitions, explicit and implicit, may be included below.

As used herein, the term “communication network” refers to a network following any suitable communication standards, such as, 5G 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. Further, 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 first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, and/or any other protocols either currently known or to be developed in the future. Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will also be future type communication technologies and systems in which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned systems.

As used herein, the term “network device” generally refers to a node in a communication network via which a terminal device can access the communication network and receive 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) , a radio access network (RAN) node, an evolved NodeB (eNodeB or eNB) , an NR NB (also referred to as a gNB) , a remote radio unit (RRU) , a radio header (RH) , an infrastructure device for a V2X (vehicle-to-everything) communication, a transmission and reception point (TRP) , a reception point (RP) , a remote radio head (RRH) , a relay, an integrated access and backhaul (IAB) node, a low power node such as a femto BS, a pico BS, and so forth, depending on the applied terminology and technology.

As used herein, the term “terminal device” generally refers to any end device that may be capable of wireless communications. By way of example rather than a limitation, a terminal device may also be referred to as a communication device, a user equipment (UE) , an end user device, a subscriber station (SS) , an unmanned aerial vehicle (UAV) , a portable subscriber station, a mobile station (MS) , or an access terminal (AT) . The terminal device may include, but is not limited to, a mobile phone, a cellular phone, a smart phone, a voice over IP (VoIP) phone, a wireless local loop phone, a tablet, a wearable terminal device, a personal digital assistant (PDA) , a portable computer, a desktop computer, an image capture terminal device such as a digital camera, a gaming terminal device, a music storage and playback appliance, a vehicle-mounted wireless terminal device, a wireless endpoint, a mobile station, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , a USB dongle, a smart device, 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 (for example, a remote surgery device) , an industrial device (for example, 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 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.

As mentioned above, the UE performs DL channel measurements by receiving CSI-RSs from the gNB and reports (e.g., feedbacks) information about channel measurement, e.g., CSI, to the gNB. With this DL channel measurement, the gNB is able to select appropriate communication parameters to efficiently and effectively perform wireless data communication with the UE. The third generation partnership project (3GPP) Release-15 CSI-RS resource set includes periodic, semi-persistent or aperiodic CSI-RS resource sets. For periodic or semi-persistent CSI-RSs, the occasions of CSI-RS set transmissions are determined by a configured periodicity and an offset of the set. For example, a periodic or semi-persistent CSI-RS resource set with a periodicity of 5ms and an offset of 0 may be configured

When one Resource Setting is configured, the Resource Setting is for channel measurements for L1-RSRP or for channel and interference measurements for L1-SINR computation. When two Resource Settings are configured, the first one Resource Setting (given by higher layer parameter resourcesForChannelMeasurement) is for channel measurements and the second one (given by either higher layer parameter csi-IM-ResourcesForInterference or higher layer parameter nzp-CSI-RS-ResourcesForInterference) is for interference measurements performed on CSI interference measurement (CSI-IM) or on non zero power (NZP) CSI-RS resource set. When three Resource Settings are configured, the first Resource Setting is for channel measurement, the second one is for CSI-IM based interference measurement and the third one is for NZP CSI-RS based interference measurement.

For periodic and semi-persistent CSI Resource Settings, when the UE is configured with groupBasedBeamReporting-r17 or groupBasedBeamReporting-v18, the number of CSI Resource Sets configured is S=2, otherwise the number of CSI-RS Resource Sets configured is limited to S=1, except for periodic CSI Resource Settings, when the UE is configured with TDCP reporting, for which the number of CSI-RS Resource Sets in the CSI Resource Setting for channel measurement is K_TRS∈ {1, 2, 3} and all the CSI-RS Resource Sets are configured with the higher layer parameter trs-Info. 3GPP Release-18 multiplex-input multiplex-output (MIMO) work item (WI) has specified typeII-Doppler CSI report and aperiodic CSI-RS (AP-CSI-RS) burst. For example, K CSI-RSs in time domain with the same antenna port and RE location could be triggered by a DCI.

With the development of wireless communication technology, more and more requirements are proposed for the CSI-RS measurements to adapt to different scenarios. For example, artificial intelligence (AI) /machine learning (ML) techniques on CSI feedback enhancements have been discussed in the 3GPP work group in terms of CSI compression and CSI prediction. In CSI prediction, historical CSI measurements in a measurement window are used to predict future CSIs in a prediction window by an AI/ML model, which is regarded to be achieved by a UE side model. The CSI-RS transmissions/measurements during a prediction window should be avoided to reduce the CSI-RS overhead/measurement overhead. Predicted CSI for a farther timestamp may be unreliable due to the low confidence of prediction results, which leads to various prediction window sizes and measurement window sizes. In addition, the speed of a mobile UE is a critical factor for the CSI prediction performance. To adapt the change of the UE speed, a CSI prediction functionality may support different measurement/prediction window configurations, e.g., the number of measured CSIs, the time interval between two adjacent measured CSIs or two adjacent predicted CSIs. Similar situations also exist in case of an AI-based temporal beam prediction where historical beam measurements in a measurement window are used to predict the best beam of a future time instance in a prediction window by a AI/ML model.

In 3GPP RAN1 work group, AI/ML for CSI prediction and temporal beam prediction have been discussed. As a result, some agreements about configuration enhancement for CSI and beam prediction have been reached. For example, it has been agreed that in order to facilitate the AI/ML model inference, the following aspects should be studied as a starting point: enhanced or new configurations/UE reporting/UE measurement, e.g., enhanced or new beam measurement and/or beam reporting; enhanced or new signaling for measurement configuration/triggering; signaling of assistance information (if applicable) ; assistance information from Network to UE (If supported) . Other aspect (s) is not precluded.

It has also been agreed that in CSI prediction using UE-side model use case, regarding whether to address the potential spec impact of CSI prediction depends on RAN#100 final conclusion, the following aspects should be focused: data collection procedure, mainly including RS configuration, measurement and report configuration, resusing as much as possible what is defined for UE side use cases; monitoring procedure and metric for AI-based CSI prediction; model/functionality selection/switching and fine-tuning procedure. It is noted that discussion on potential specification impact is limited to aspects which would not duplicate the work in Release-18 MIMO WI. It is also noted to minimize LCM related potential specification impact discussion that follow the high-level principle of other one-sided model sub-cases.

In view of the above and other aspects, embodiments of the present disclosure provide solutions for configurations for CSI-RSs. Embodiments of the present disclosure may be applied for an AI-based CSI prediction. It is to be understood that the disclosure described herein may also be applied in various scenarios other than the AI-based CSI prediction. Aspects of the present disclosure are described in the context of a wireless communications system.

FIG. 1 illustrates an example of a wireless communications system 100 that supports configurations for CSI-RSs in accordance with aspects of the present disclosure. The wireless communications system 100 may include one or more network entities 102 (also referred to as network equipment (NE) ) , one or more UEs 104, a core network 106, and a packet data network 108. The wireless communications system 100 may support various radio access technologies. In some implementations, the wireless communications system 100 may be a 4G network, such as an LTE network or an LTE-Advanced (LTE-A) network. In some other implementations, the wireless communications system 100 may be a 5G network, such as an NR network. In other implementations, the wireless communications system 100 may be a combination of a 4G network and a 5G network, or other suitable radio access technology including Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20. The wireless communications system 100 may support radio access technologies beyond 5G. Additionally, the wireless communications system 100 may support technologies, such as time division multiple access (TDMA) , frequency division multiple access (FDMA) , or code division multiple access (CDMA) , etc.

The one or more network entities 102 may be dispersed throughout a geographic region to form the wireless communications system 100. One or more of the network entities 102 described herein may be or include or may be referred to as a network node, a base station, a network element, a radio access network (RAN) , a base transceiver station, an access point, a NodeB, an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. A network entity 102 and a UE 104 may communicate via a communication link 110, which may be a wireless or wired connection. For example, a network entity 102 and a UE 104 may perform wireless communication (e.g., receive signaling, transmit signaling) over a Uu interface.

A network entity 102 may provide a geographic coverage area 112 for which the network entity 102 may support services (e.g., voice, video, packet data, messaging, broadcast, etc. ) for one or more UEs 104 within the geographic coverage area 112. For example, a network entity 102 and a UE 104 may support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc. ) according to one or multiple radio access technologies. In some implementations, a network entity 102 may be moveable, for example, a satellite associated with a non-terrestrial network. In some implementations, different geographic coverage areas 112 associated with the same or different radio access technologies may overlap, but the different geographic coverage areas 112 may be associated with different network entities 102. Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

The one or more UEs 104 may be dispersed throughout a geographic region of the wireless communications system 100. A UE 104 may include or may be referred to as a mobile device, a wireless device, a remote device, a remote unit, a handheld device, or a subscriber device, or some other suitable terminology. In some implementations, the UE 104 may be referred to as a unit, a station, a terminal, or a client, among other examples. Additionally, or alternatively, the UE 104 may be referred to as an Internet-of-Things (IoT) device, an Internet-of-Everything (IoE) device, or machine-type communication (MTC) device, among other examples. In some implementations, a UE 104 may be stationary in the wireless communications system 100. In some other implementations, a UE 104 may be mobile in the wireless communications system 100.

The one or more UEs 104 may be devices in different forms or having different capabilities. Some examples of UEs 104 are illustrated in FIG. 1. A UE 104 may be capable of communicating with various types of devices, such as the network entities 102, other UEs 104, or network equipment (e.g., the core network 106, the packet data network 108, a relay device, an integrated access and backhaul (IAB) node, or another network equipment) , as shown in FIG. 1. Additionally, or alternatively, a UE 104 may support communication with other network entities 102 or UEs 104, which may act as relays in the wireless communications system 100.

A UE 104 may also be able to support wireless communication directly with other UEs 104 over a communication link 114. For example, a UE 104 may support wireless communication directly with another UE 104 over a device-to-device (D2D) communication link. In some implementations, such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular-V2X deployments, the communication link 114 may be referred to as a sidelink. For example, a UE 104 may support wireless communication directly with another UE 104 over a PC5 interface.

A network entity 102 may support communications with the core network 106, or with another network entity 102, or both. For example, a network entity 102 may interface with the core network 106 through one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The network entities 102 may communicate with each other over the backhaul links 116 (e.g., via an X2, Xn, or another network interface) . In some implementations, the network entities 102 may communicate with each other directly (e.g., between the network entities 102) . In some other implementations, the network entities 102 may communicate with each other or indirectly (e.g., via the core network 106) . In some implementations, one or more network entities 102 may include subcomponents, such as an access network entity, which may be an example of an access node controller (ANC) . An ANC may communicate with the one or more UEs 104 through one or more other access network transmission entities, which may be referred to as a radio heads, smart radio heads, or transmission-reception points (TRPs) .

In some implementations, a network entity 102 may be configured in a disaggregated architecture, which may be configured to utilize a protocol stack physically or logically distributed among two or more network entities 102, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) , or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN) ) . For example, a network entity 102 may include one or more of a central unit (CU) , a distributed unit (DU) , a radio unit (RU) , a RAN Intelligent Controller (RIC) (e.g., a Near-Real Time RIC (Near-RT RIC) , a Non-Real Time RIC (Non-RT RIC) ) , a Service Management and Orchestration (SMO) system, or any combination thereof.

An RU may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a transmission reception point (TRP) . One or more components of the network entities 102 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 102 may be located in distributed locations (e.g., separate physical locations) . In some implementations, one or more network entities 102 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU) ) .

Split of functionality between a CU, a DU, and an RU may be flexible and may support different functionalities depending upon which functions (e.g., network layer functions, protocol layer functions, baseband functions, radio frequency functions, and any combinations thereof) are performed at a CU, a DU, or an RU. For example, a functional split of a protocol stack may be employed between a CU and a DU such that the CU may support one or more layers of the protocol stack and the DU may support one or more different layers of the protocol stack. In some implementations, the CU may host upper protocol layer (e.g., a layer 3 (L3) , a layer 2 (L2) ) functionality and signaling (e.g., Radio Resource Control (RRC) , service data adaption protocol (SDAP) , Packet Data Convergence Protocol (PDCP) ) . The CU may be connected to one or more DUs or RUs, and the one or more DUs or RUs may host lower protocol layers, such as a layer 1 (L1) (e.g., physical (PHY) layer) or an L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160.

Additionally, or alternatively, a functional split of the protocol stack may be employed between a DU and an RU such that the DU may support one or more layers of the protocol stack and the RU may support one or more different layers of the protocol stack. The DU may support one or multiple different cells (e.g., via one or more RUs) . In some implementations, a functional split between a CU and a DU, or between a DU and an RU may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU, a DU, or an RU, while other functions of the protocol layer are performed by a different one of the CU, the DU, or the RU) .

A CU may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU may be connected to one or more DUs via a midhaul communication link (e.g., F1, F1-c, F1-u) , and a DU may be connected to one or more RUs via a fronthaul communication link (e.g., open fronthaul (FH) interface) . In some implementations, a midhaul communication link or a fronthaul communication link may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 102 that are in communication via such communication links.

The core network 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The core network 106 may be an evolved packet core (EPC) , or a 5G core (5GC) , which may include a control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management functions (AMF) ) and a user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . In some implementations, the control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management (e.g., data bearers, signal bearers, etc. ) for the one or more UEs 104 served by the one or more network entities 102 associated with the core network 106.

In some embodiments, the core network 106 may further include a location server, e.g., a location management function (LMF) . The LMF may receive measurements and assistance information from the network entity 102 and the UE 104 via the AMF to compute the position of the UE 104. A NR positioning protocol A (NRPPa) protocol was introduced to carry the positioning information between RAN and LMF over the next generation control plane interface (NG-C) . The LMF and the network entity 102 may communicate using the NRPPa defined in 3GPP TS 38.455, where NRPPa messages are communicated between the network entity 102 and the LMF via an AMF. The LMF and the UE 104 may communicate using the LTE Positioning Protocol (LPP) defined in 3GPP TS 36.355, where LPP messages are communicated between the UE 104 and the LMF via a serving AMF and a serving network entity for the UE. For example, LPP messages may be communicated between the LMF and the AMF using hypertext transfer protocol (HTTP) -based service operations, and LPP messages may be communicated between the AMF and the UE using a 5G non-access stratum (NAS) protocol. The LPP protocol may be used to support positioning of the UE using UE-assisted and/or UE-based positioning methods, such as assisted GNSS (a-GNSS) , Real Time Kinematics (RTK) , Wireless Local Area Network (WLAN) , observed time difference of arrival (OTDOA) , and/or Enhanced Cell Identity (ECID) . The NRPPa protocol may be used to support positioning of UE using network-based positioning methods, such as ECID (when used with measurements obtained by the network entity 102) , and/or the NRPPa protocol may be used by the LMF to obtain location-related information from the network entity 102, such as parameters defining Positioning Reference Signal (PRS) transmissions from the network entity 102 and the location of the network entity 102, to support OTDOA and ECID.

The core network 106 may communicate with the packet data network 108 over one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The packet data network 108 may include an application server 118. In some implementations, one or more UEs 104 may communicate with the application server 118. A UE 104 may establish a session (e.g., a protocol data unit (PDU) session, or the like) with the core network 106 via a network entity 102. The core network 106 may route traffic (e.g., control information, data, and the like) between the UE 104 and the application server 118 using the established session (e.g., the established PDU session) . The PDU session may be an example of a logical connection between the UE 104 and the core network 106 (e.g., one or more network functions of the core network 106) .

In the wireless communications system 100, the network entities 102 and the UEs 104 may use resources of the wireless communications system 100 (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) ) to perform various operations (e.g., wireless communications) . In some implementations, the network entities 102 and the UEs 104 may support different resource structures. For example, the network entities 102 and the UEs 104 may support different frame structures. In some implementations, such as in 4G, the network entities 102 and the UEs 104 may support a single frame structure. In some other implementations, such as in 5G and among other suitable radio access technologies, the network entities 102 and the UEs 104 may support various frame structures (i.e., multiple frame structures) . The network entities 102 and the UEs 104 may support various frame structures based on one or more numerologies.

One or more numerologies may be supported in the wireless communications system 100, and a numerology may include a subcarrier spacing and a cyclic prefix. A first numerology (e.g., μ=0) may be associated with a first subcarrier spacing (e.g., 15 kHz) and a normal cyclic prefix. In some implementations, the first numerology (e.g., μ=0) associated with the first subcarrier spacing (e.g., 15 kHz) may utilize one slot per subframe. A second numerology (e.g., μ=1) may be associated with a second subcarrier spacing (e.g., 30 kHz) and a normal cyclic prefix. A third numerology (e.g., μ=2) may be associated with a third subcarrier spacing (e.g., 60 kHz) and a normal cyclic prefix or an extended cyclic prefix. A fourth numerology (e.g., μ=3) may be associated with a fourth subcarrier spacing (e.g., 120 kHz) and a normal cyclic prefix. A fifth numerology (e.g., μ=4) may be associated with a fifth subcarrier spacing (e.g., 240 kHz) and a normal cyclic prefix.

A time interval of a resource (e.g., a communication resource) may be organized according to frames (also referred to as radio frames) . Each frame may have a duration, for example, a 10 millisecond (ms) duration. In some implementations, each frame may include multiple subframes. For example, each frame may include 10 subframes, and each subframe may have a duration, for example, a 1 ms duration. In some implementations, each frame may have the same duration. In some implementations, each subframe of a frame may have the same duration.

Additionally or alternatively, a time interval of a resource (e.g., a communication resource) may be organized according to slots. For example, a subframe may include a number (e.g., quantity) of slots. The number of slots in each subframe may also depend on the one or more numerologies supported in the wireless communications system 100. For instance, the first, second, third, fourth, and fifth numerologies (i.e., μ=0, μ=1, μ=2, μ=3, μ=4) associated with respective subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz may utilize a single slot per subframe, two slots per subframe, four slots per subframe, eight slots per subframe, and 16 slots per subframe, respectively. Each slot may include a number (e.g., quantity) of symbols (e.g., OFDM symbols) . In some implementations, the number (e.g., quantity) of slots for a subframe may depend on a numerology. For a normal cyclic prefix, a slot may include 14 symbols. For an extended cyclic prefix (e.g., applicable for 60 kHz subcarrier spacing) , a slot may include 12 symbols. The relationship between the number of symbols per slot, the number of slots per subframe, and the number of slots per frame for a normal cyclic prefix and an extended cyclic prefix may depend on a numerology. It should be understood that reference to a first numerology (e.g., μ=0) associated with a first subcarrier spacing (e.g., 15 kHz) may be used interchangeably between subframes and slots.

In the wireless communications system 100, an electromagnetic (EM) spectrum may be split, based on frequency or wavelength, into various classes, frequency bands, frequency channels, etc. By way of example, the wireless communications system 100 may support one or multiple operating frequency bands, such as frequency range designations FR1 (410 MHz –7.125 GHz) , FR2 (24.25 GHz –52.6 GHz) , FR3 (7.125 GHz –24.25 GHz) , FR4 (52.6 GHz –114.25 GHz) , FR4a or FR4-1 (52.6 GHz –71 GHz) , and FR5 (114.25 GHz –300 GHz) . In some implementations, the network entities 102 and the UEs 104 may perform wireless communications over one or more of the operating frequency bands. In some implementations, FR1 may be used by the network entities 102 and the UEs 104, among other equipment or devices for cellular communications traffic (e.g., control information, data) . In some implementations, FR2 may be used by the network entities 102 and the UEs 104, among other equipment or devices for short-range, high data rate capabilities.

FR1 may be associated with one or multiple numerologies (e.g., at least three numerologies) . For example, FR1 may be associated with a first numerology (e.g., μ=0) , which includes 15 kHz subcarrier spacing; a second numerology (e.g., μ=1) , which includes 30 kHz subcarrier spacing; and a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing. FR2 may be associated with one or multiple numerologies (e.g., at least 2 numerologies) . For example, FR2 may be associated with a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing; and a fourth numerology (e.g., μ=3) , which includes 120 kHz subcarrier spacing.

FIG. 2 illustrates an example signaling chart of an example process 200 that supports configurations for CSI-RSs in accordance with aspects of the present disclosure. For the purpose of discussion, the process 200 will be described with reference to FIG. 1, and the process 200 may involve a UE 104 and a network entity 102 as shown in FIG. 1. It is to be understood that the steps and the order of the steps in FIG. 2 are merely for illustration, and not for limitation. It is to be understood that process 200 may further include additional blocks not shown and/or omit some shown blocks, and the scope of the present disclosure is not limited in this regard.

As shown in FIG. 2, the network entity 102 transmits 201 a CSI-RS resource configuration 202 associated with a plurality of resource sets to the UE 104. Accordingly, the UE 104 receives 203 the CSI-RS resource configuration 202. The network entity 102 transmits 204 CSI-RSs 205 on the plurality of resource sets to the UE 104. Accordingly, the UE 104 receives 206 the CSI-RSs 205 on the plurality of resource sets. In this way, multiple resource sets may be utilized for CSI-RS transmissions. The flexibility of CSI-RS transmissions may thus be improved.

In an example implementation, the time domain behavior of CSI-RS resources within the plurality of resource sets may be configured to be periodic. In other words, the plurality of resource sets may be transmitted in a periodic way. In another example implementation, the time domain behavior of CSI-RS resources within the plurality of resource sets may be configured to be semi-persistent. In other words, the plurality of resource sets may be transmitted in a semi-persistent way. The plurality of resource sets may have a same periodicity and different time domain offsets.

In some example embodiments, the plurality of resource sets may be associated with a same list of TCI state. Alternatively or additionally, the plurality of resource sets may be associated with a same list of QCL-TypeD indication.

In some embodiments, after transmitting the CSI-RS resource configuration 202 to the UE 104, the network entity 102 may further transmit an activation signaling to the UE 104. For example, the plurality of resource sets may be transmitted in a semi-persistent way. The plurality of resource sets may be configured via a RRC signaling and activated by a MAC CE. The UE 104 may then receive CSI-RSs from the network entity 102 using the activated resource sets.

In a more specific implementation, the UE 104 may receive, from the network entity 102, an indication for activating one of the plurality of resource sets. Based on the indication, the UE 104 may determine that the plurality of resource sets are activated. For example, if the CSI-RS resource sets have a semi-persistent time behavior, the network entity 102 may activate the CSI-RS resource sets through a signaling (e.g., a MAC CE) . One CSI-RS resource set may be activated using a legacy MAC CE for activating SP CSI-RS resource set. Then other CSI-RS resource sets belonging to the same CSI resource configuration with this CSI-RS resource set are activated as well.

In another specific implementation, the UE 104 may receive, from the network entity 102, an indication of the CSI-RS resource configuration 202. Based on the indication, the UE 104 may determine that the plurality of resource sets are activated. For example, if the CSI-RS resource sets have a semi-persistent time behavior, the network entity 102 may activate the CSI-RS resource sets through an indication of the CSI-RS resource configuration.

In some example embodiments, if the CSI-RS resource sets have a semi-persistent time behavior, the activation may be initiated by the UE. For example, the UE 104 may transmit, to the network entity 102, a request for activating the CSI-RS resource configuration 202. In an example implementation, the request for activating the CSI-RS resource configuration 202 may include an indication of a model for a CSI prediction or a beam prediction associated with the CSI-RS resource configuration 202. In another example implementation, the request for activating the CSI-RS resource configuration 202 may include an indication of a CSI report configuration associated with the CSI-RS resource configuration 202. In a further example implementation, the request for activating the CSI-RS resource configuration 202 may include an indication of the CSI-RS resource configuration 202. For example, the UE 102 may report information of a model applied in an AI-based CSI prediction functionality or information of a required CSI-RS resource configuration combination. Then, the network entity 102 may activate the corresponding CSI-RS resource sets. The information may be a model ID of applied model, or an identifier of a CSI report configuration or an identifier of a CSI resource configuration.

In some example embodiments, the UE 104 may transmit, to the network entity 102, an indication of at least one measurement and prediction pattern. Each of the at least one measurement and prediction pattern may be associated with a respective model for a CSI prediction or a beam prediction. The network entity 102 may transmit the CSI-RS resource configuration 202 to the UE 104 based on the at least one measurement and prediction pattern.

For example, the UE 104 may report the supported measurement and prediction pattern (s) for an AI-based CSI or temporal beam prediction functionality through e.g., UE capability or UE assistance information (UAI) etc. Each pattern is associated with an AI/ML model of the functionality. Specifically, the UE 104 may report time interval of two adjacent measurement instances, time interval of two adjacent prediction instances and the following parameters: Z (pattern cycle) , e.g., the number of measurement and prediction time instances or a value of time periodicity; X (measurement window) , e.g., the number of measured samples in a time duration; Y (prediction window) , e.g., the number of predicted samples in a future time duration; and G (time gap) , e.g., the time gap between the end of the measurement window and the beginning of the prediction window. FIG. 3A shows an example of the content of a signaling to report the supported measurement and prediction pattern.

Based on the reported pattern, the network entity 102 may configure CSI report configurations to the UE 104 for the AI-based CSI prediction functionality. Each CSI report configuration may be associated with a respective CSI-RS resource configuration. It is to be understood that the disclosure described herein may also be applied in various scenarios other than the AI-based CSI/temporal beam prediction. For example, the network entity may transmit CSI report configuration (s) and associated CSI-RS resource configuration (s) to the UE without receiving the measurement and prediction pattern (s) supported by the UE.

The CSI-RS resource configuration may comprise a plurality of CSI-RS resource sets with the same time domain behavior (e.g., periodic, semi-persistent or aperiodic) , the same periodicity but different time domain offset, the same list of TCI state or the same list of QCL-TypeD indication.

If the CSI-RS resource sets have a semi-persistent time behavior, the network entity 102 shall activate the CSI-RS resource sets through a signaling, e.g., a legacy MAC CE for activating a SP CSI-RS resource set, or an indication of the CSI-RS resource configuration. In some cases, after receiving the CSI-RS resource configuration, the UE 104 may report information of a model applied in the functionality or information of required CSI-RS resource configuration combination, then the network entity 102 may activate the corresponding CSI-RS resource sets. The information may be a model ID of applied model, or an identifier of a CSI report configuration or an identifier of a CSI resource configuration.

The UE 104 receives CSI-RSs on the plurality of CSI-RS sets based on the CSI-RS resource configuration, if needed, after activation. In some embodiments, if the reception beam for the UE receiving the CSI-RSs is changed, e.g., upon receiving a DCI indicating a new list of TCI state for data transmission, the UE 104 shall drop the corresponding CSI report for the AI-based CSI prediction functionality.

Table 1 illustrates examples of two CSI report configurations and associated CSI-RS resource configurations (denoted as C1 and C2) . The CSI-RS resource configuration C1 may be configured for low mobility and the CSI-RS resource configuration C2 may be configured high mobility.

Table 1 CSI report configurations and associated CSI-RS resource configurations

FIG. 3B illustrates example diagrams of CSI-RS transmissions and associated reporting based on a plurality of resource sets in accordance with aspects of the present disclosure. The CSI-RS transmissions and associated reporting in FIG. 3B may be based on the example configurations in Table 1. For the CSI-RS resource configuration C1, a periodic or semi-persistent (P/SP) CSI report with a periodicity of 40ms is configured for AI CSI prediction in low UE mobility, and the associated CSI-RS configuration combination comprises 4 P/SP CSI-RS resource sets (i.e., CSI-RS set 0, CSI-RS set 1, CSI-RS set 2, CSI-RS set 3) with the same periodicity of 40ms and different time domain offsets.

In an example implementation, in case that the CSI-RS resource sets have a semi-persistent time behavior, if one of the CSI-RS resource sets, e.g., CSI-RS set 0, is activated by the network entity 102 using a legacy MAC CE for activating SP CSI-RS resource set, the other CSI-RS resource sets, i.e., CSI-RS set 1, CSI-RS set 2 and CSI-RS set 3 are activated as well. In another example implementation, in case that the CSI-RS resource sets have a semi-persistent time behavior, the network entity 102 indicates the CSI-RS resource configuration ID to the UE 104 for activating all CSI-RS resource sets belonging to the CSI-RS resource configuration C1. In the AI CSI prediction, multiple measured CSIs are used to predict future CSIs. An AI-CSI report is associated with multiple CSI-RS sets. Activating these CSI-RS resource sets using a signaling at same time may reduce latency and signaling overhead.

For the CSI-RS resource configuration C2, a P/SP CSI report with a periodicity of 20ms is configured for AI CSI prediction in low UE mobility, and the associated CSI-RS configuration combination comprises 3 P/SP CSI-RS resource sets (i.e., CSI-RS set 0, CSI-RS set 1, CSI-RS set 2) with the same periodicity of 20ms and different time domain offsets.

In an example implementation, in case that the CSI-RS resource sets have a semi-persistent time behavior, if one of the CSI-RS resource sets, e.g., CSI-RS set 0, is activated by the network entity 102 using a legacy MAC CE for activating SP CSI-RS resource set, the other CSI-RS resource sets, i.e., CSI-RS set 1 and CSI-RS set 2 are activated as well. In another example implementation, in case that the CSI-RS resource sets have a semi-persistent time behavior, the network entity 102 indicates the CSI-RS resource configuration ID to the UE 104 for activating all CSI-RS resource sets belonging to the CSI-RS resource configuration C2.

The CSI-RS transmissions may be performed based on corresponding resource configurations to satisfy different requirements. The RS/measurement overhead may be reduced and the reliability for CSI prediction may be improved.

FIG. 4 illustrates an example signaling chart of an example process 400 that supports configurations for CSI-RSs in accordance with aspects of the present disclosure. For the purpose of discussion, the process 400 will be described with reference to FIG. 1, and the process 400 may involve a UE 104 and a network entity 102 as shown in FIG. 1. It is to be understood that the steps and the order of the steps in FIG. 4 are merely for illustration, and not for limitation. It is to be understood that process 400 may further include additional blocks not shown and/or omit some shown blocks, and the scope of the present disclosure is not limited in this regard.

As shown in FIG. 4, the network entity 102 transmits 401 a CSI-RS resource configuration 402 associated with a resource set to the UE 104. Accordingly, the UE 104 receives 403 the CSI-RS resource configuration 402. The network entity 102 transmits 404 a transmission configuration 405 associated with the resource set to the UE 104. Accordingly, the UE 104 receives 406 the transmission configuration 405. The network entity 102 transmits 407 CSI-RSs 408 on the resource set to the UE 104 based on the transmission configuration 405. Accordingly, the UE 104 receives 409 the CSI-RSs 405 on the resource set based on the transmission configuration 405. In this way, CSI-RS transmissions on the resource set may be performed based on the transmission configuration. The flexibility of CSI-RS transmissions may thus be improved.

In some example embodiments, the UE 104 may transmit, to the network entity 102, an indication of at least one measurement and prediction pattern. Each of the at least one measurement and prediction pattern may be associated with a respective model for a CSI prediction or a beam prediction. The network entity 102 may transmit the CSI-RS resource configuration 402 to the UE 104 based on the at least one measurement and prediction pattern.

For example, the UE 104 may report the supported measurement and prediction pattern (s) for an AI-based CSI or temporal beam prediction functionality through e.g., UE capability or UE UAI etc. Each pattern is associated with an AI/ML model of the functionality. Specifically, the UE 104 may report time interval of two adjacent measurement instances, time interval of two adjacent prediction instances and the following parameters: Z (pattern cycle) , e.g., the number of measurement and prediction time instances or a value of time periodicity; X (measurement window) , e.g., the number of measured samples in a time duration; Y (prediction window) , e.g., the number of predicted samples in a future time duration; and G (time gap) , e.g., the time gap between the end of the measurement window and the beginning of the prediction window. The content of a signaling to report the supported measurement and prediction pattern may be implemented similarly to the example in FIG. 3A.

Based on the reported pattern, the network entity 102 may configure the corresponding CSI-RS resources via CSI-RS resource configuration (s) for AI-based CSI/temporal beam prediction. It is to be understood that the disclosure described herein may also be applied in various scenarios other than the AI-based CSI/temporal beam prediction. For example, the network entity may configure the UE with CSI-RS resources via CSI-RS resource configuration (s) without receiving the measurement and prediction pattern (s) supported by the UE.

In some example embodiments, the CSI-RSs 408 may be transmitted from the network entity 102 to the UE 104 on the resource set based on the transmission configuration 405 periodically before an updated transmission configuration 405 or an indication to release the transmission configuration 405 may be received.

In some example embodiments, the resource set may include a plurality of CSI-RS resources. The transmission configuration 405 may be indicative of at least one time interval between two adjacent CSI-RS resources of the resource set or two adjacent groups of CSI-RS resources of the resource set. In other words, based on the transmission configuration 405, one resource set comprising multiple CSI-RS resources may be configured. A time-interval between two consecutive CSI-RS resources may be indicated by the network device 102. The network device 102 may also configure multiple CSI-RS resource groups in the resource set where each CSI-RS resource group comprises at least one CSI-RS resources of the resource set. A time-interval between two consecutive CSI-RS resource groups may be indicated by the network device 102.

In some embodiments, the time interval and/or CSI-RS resource group may be configured together with corresponding CSI-RS resource set by RRC signaling, e.g., an information element of a NZP CSI-RS resource set. Alternatively, the time interval and/or CSI-RS resource group may be configured by a MAC CE, e.g., a MAC CE activating the corresponding CSI-RS resource set or a dedicated MAC CE. Alternatively, the time interval and/or CSI-RS resource group may be configured together with corresponding CSI-RS resource set by RRC signaling and updated by a MAC CE. In some embodiments, the time domain behavior of the CSI-RS resources of the set may be configured to periodic or semi-persistent. The CSI-RS resources of the set have different CSI-RS resource ID and can be configured to different configurations, e.g., different TCI-state IDs, different RE locations, etc.

In an example implementation, a CSI-RS resource set may include 32 CSI-RS resources which are divided into 4 CSI-RS resource groups, and each CSI-RS resource group may include 8 CSI-RS resources. An example for the relation of CSI-RS resource set, CSI-RS resource group and CSI-RS resource is illustrated in Table 2.

Table 2 Relation of CSI-RS resource set, CSI-RS resource group and CSI-RS resource

FIG. 5 illustrates an example diagram of CSI-RS transmissions based on a resource set comprising multiple resources in accordance with aspects of the present disclosure. The relation of CSI-RS resource set, CSI-RS resource group and CSI-RS resource in FIG. 5 may be based on the example relation in Table 2. In the example shown in FIG. 5, a CSI-RS resource set may be configured with a periodicity of 128ms and an offset of 0. The CSI-RS resource set may include 32 CSI-RS resources which are divided into 4 CSI-RS resource groups, and each CSI-RS resource group may include 8 CSI-RS resources. The network device 102 may indicate a time-interval between two consecutive CSI-RS resource groups, e.g., 16ms.

In some example embodiments, the transmission configuration 405 may be indicative of at least one offset associated with a plurality of occasions for transmission repetitions. The CSI-RSs 408 may be transmitted from the network entity 102 to the UE 104 on the resource set at the plurality of occasions for transmission repetitions.

In an example implementation, the transmission configuration 405 may be indicative of at least one offset from a start point of a first occasion in a plurality of occasions for transmission repetitions. The first occasion may be associated with a periodicity of the resource set and a time domain offset of the resource set. At least one occasion in the plurality of occasions subsequent to the first occasion may be associated with the first occasion and the at least one offset. The UE 104 may receive 409 the CSI-RSs 408 from the network entity 102 on the resource set at the plurality of occasions for transmission repetitions.

For example, the CSI-RSs 408 may be transmitted repeatedly during a period based on a startoffset list. The first occasion of the CSI-RS resource set in the period may be determined based on a periodicity of the CSI-RS resource set and a time domain offset of the CSI-RS resource set. The subsequent occasion (s) of the CSI-RS resource set in the period may be determined based on the first occasion of the CSI-RS resource set in the period and the startoffset list. The startoffset list comprising multiple values may be indicated to the UE. Each element of the startoffset list may correspond to a transmission occasion for transmission repetitions on the CSI-RS resource set.

FIG. 6A illustrates an example diagram of CSI-RS transmissions based on repetitions on a resource set in accordance with aspects of the present disclosure. In the example shown in FIG. 6A, a SP CSI-RS resource set may be configured to a UE with a periodicity of 40ms and a time domain offset of 0, and a startoffset list of {5ms, 10ms, 15ms} is indicated to the UE.

The first occasion (Rep0) in a period of the CSI-RS resource set may be determined based on the periodicity (40ms) and time domain offset (0) of the CSI-RS resource set. The second occasion (Rep1) in the period of the CSI-RS resource set may be determined based on the first occasion and the first element of the startoffset list (5ms) . The third occasion (Rep2) in the period of the CSI-RS resource set may be determined based on the first occasion and the second element of the startoffset list (10ms) . The fourth occasion (Rep3) in the period of the CSI-RS resource set may be determined based on the first occasion and the third element of the startoffset list (15ms) .

In another example implementation, the transmission configuration 405 may be indicative of at least one offset from a start point of a previous occasion in the plurality of occasions for transmission repetitions. A first occasion may be associated with a periodicity of the resource set and a time domain offset of the resource set. At least one occasion in the plurality of occasions subsequent to the first occasion may be associated with the previous occasion and the at least one offset. The UE 104 may receive 409 the CSI-RSs 408 from the network entity 102 on the resource set at the plurality of occasions for transmission repetitions.

For example, the CSI-RSs 408 may be transmitted repeatedly during a period based on a startoffset list. The first occasion of the CSI-RS resource set in the period may be determined based on a periodicity of the CSI-RS resource set and a time domain offset of the CSI-RS resource set. The subsequent occasion (s) of the CSI-RS resource set in the period may be determined based on a previous occasion of the CSI-RS resource set in the period and the startoffset list. The startoffset list comprising multiple values may be indicated to the UE. Each element of the startoffset list may correspond to a transmission occasion for transmission repetitions on the CSI-RS resource set.

Still taking FIG. 6A as an example, a SP CSI-RS resource set may be configured to a UE with a periodicity of 40ms and a time domain offset of 0, and a startoffset list of {5ms, 5ms, 5ms} is indicated to the UE. The first occasion (Rep0) in a period of the CSI-RS resource set may be determined based on the periodicity (40ms) and time domain offset (0) of the CSI-RS resource set. The second occasion (Rep1) in the period of the CSI-RS resource set may be determined based on the first occasion and the first element of the startoffset list (5ms) . The third occasion (Rep2) in the period of the CSI-RS resource set may be determined based on the second occasion and the second element of the startoffset list (5ms) . The fourth occasion (Rep3) in the period of the CSI-RS resource set may be determined based on the third occasion and the third element of the startoffset list (5ms) .

In a further example implementation, the transmission configuration 405 may be indicative of a plurality of offsets from a start point of a transmission period comprising a plurality of occasions for transmission repetitions. The plurality of occasions may be associated with a periodicity of the resource set, a time domain offset of the resource set and the plurality of offsets. The UE 104 may receive 409 the CSI-RSs 408 from the network entity 102 on the resource set at the plurality of occasions for transmission repetitions.

For example, the CSI-RSs 408 may be transmitted repeatedly during a period based on a startoffset list. The occasions on the CSI-RS resource set in the period may be determined based on a periodicity of the CSI-RS resource set, a time domain offset of the CSI-RS resource set and the startoffset list. The startoffset list comprising multiple values may be indicated to the UE. Each element of the startoffset list may correspond to a transmission occasion on the CSI-RS resource set.

Still taking FIG. 6A as an example, a P/SP CSI-RS resource set may be configured to a UE with a periodicity of 40ms and a time domain offset of 0, and a startoffset list of {0ms, 5ms, 10ms, 15ms} is indicated to the UE. Four occasions in a period of the CSI-RS resource set may be determined based on the periodicity (40ms) and time domain offset (0) of the CSI-RS resource set and the respective element (0ms, 5ms, 10ms, 16ms) in the startoffset list. For example, the first occasion (Rep0) in a period of the CSI-RS resource set may be determined based on the periodicity (40ms) and time domain offset (0) of the CSI-RS resource set and the first element of the startoffset list.

In some example embodiments, the transmission repetitions may be associated with at least one of the following: a same antenna port configuration; a same resource element (RE) location; a same list of TCI state; or a same list of QCL-TypeD indication. In other words, all CSI-RS resource set repetitions may have a same configuration, e.g., the same antenna port configuration, the same RE location and the same list of TCI state or the same list of QCL-TypeD indication.

In some example embodiments, the CSI-RS resource configuration 402 and the transmission configuration 405 may be carried in a radio resource control (RRC) signaling. For example, the startoffset list may be configured from the network entity 102 to the UE 104 by a signaling, e.g., a RRC signaling. The startoffset list may be configured together with corresponding CSI-RS resource set by RRC signaling, e.g., an information element of a NZP CSI-RS resource set.

In some example embodiments, the transmission configuration 405 may be carried in a medium access control (MAC) control element (CE) for activating the resource set. For example, the startoffset list may be configured from the network entity 102 to the UE 104 by a MAC CE, e.g., a MAC CE activating the corresponding CSI-RS resource set or a dedicated MAC CE indicative of the startoffset list.

In some example embodiments, the CSI-RS resource configuration 402 and the transmission configuration 405 may be carried in a RRC signaling and the transmission configuration 405 may be updated via a MAC CE. For example, the startoffset list may be configured together with the corresponding CSI-RS resource set by a signaling, e.g., a RRC signaling. The startoffset list may be updated by MAC CE.

In some example embodiments, the transmission configuration 405 may include an ID of the resource set and the offset (s) , e.g., the startoffset list. In a specific implementation, the transmission configuration 405 may include an ID of the resource set, the number of the occasions and the offset (s) . For example, in the example shown in FIG. 6A, the transmission configuration 405 may include an ID of the resource set, the number of the occasions (4) and offsets values in the startoffset list. In another specific implementation, the transmission configuration 405 may include an ID of the resource set, the number of the offset (s) and the offset (s) . For example, in the example shown in FIG. 6A, the transmission configuration 405 may include an ID of the resource set, the number of elements in the startoffset list and offsets values in the startoffset list.

In a further specific implementation, the transmission configuration 405 may include an ID of the resource set and a fixed number of offset values. The offsets correspond to offsets values with valid values among the fixed number of offset values. If the number of the offsets is smaller than the fixed number, remaining offset values have invalid values. In other words, it may be aligned between the network entity 102 and the UE 104 that a fixed number of offset values (i.e., a field of offset values with a fixed size) may be provided in the transmission configuration 405. Offset values with invalid values may not correspond to offsets for the occasions. In this way, the number of offsets indicated in the transmission configuration 405 or the number of occasions for transmission repetition may be implicitly indicated.

In a specific example, 5 offset values may be provided in the transmission configuration 405, and the transmission configuration 405 may be indicative of at least one offset from a start point of a first occasion in a plurality of occasions for transmission repetitions. Negative values or zero may be invalid offset values and may be used to represent the remaining offset values that do not correspond to offsets for the occasions. In the example shown in FIG. 6A, the transmission configuration 405 may include a startoffset list of {5ms, 10ms, 16ms, 0, 0} or a startoffset list of {5ms, 10ms, 16ms, -1, -1} .

In another specific example, 5 offset values may be provided in the transmission configuration 405, and the transmission configuration 405 may be indicative of at least one offset from a start point of a previous occasion in the plurality of occasions for transmission repetitions. Negative values or zero may be invalid offset values and may be used to represent the remaining offset values that do not correspond to offsets for the occasions. In the example shown in FIG. 6A, the transmission configuration 405 may include a startoffset list of {5ms, 5ms, 5ms, 0, 0} or a startoffset list of {5ms, 5ms, 5ms, -1, -1} .

In a further specific example, 5 offset values may be provided in the transmission configuration 405, and the transmission configuration 405 may be indicative of a plurality of offsets from a start point of a transmission period comprising a plurality of occasions for transmission repetitions. Negative values may be invalid offset values and may be used to represent the remaining offset values that do not correspond to offsets for the occasions. In the example shown in FIG. 6A, the transmission configuration 405 may include a startoffset list of {0ms, 5ms, 10ms, 16ms, -1} .

Alternatively, the transmission configuration 405 may include an ID of the resource set and an ID of a list of the offset (s) , e.g., an ID of the startoffset list. The list may be one among at least one pre-configured list.

In some examples, the transmission configuration 405 may further include an ID of a list of TCI state for the CSI-RSs 408 applied to the transmission repetitions.

In some embodiments, the network entity 102 may transmit a MAC CE to configure the startoffset list. Alternatively or additionally, the network entity 102 may transmit a MAC CE to update the startoffset list. The content of a MAC CE signaling may include a CSI-RS resource set ID and an indicator of the startoffset list. The indicator of the startoffset list may be a codepoint indicating one among the startoffset lists pre-configured by the network entity 102. If need, TCI state ID for the CSI-RSs within a CSI-RS resource set could be indicated by the MAC CE and applied to all CSI-RS transmission repetitions on the CSI-RS resource set.

FIG. 6B illustrates an example structure of a MAC CE for a transmission configuration associated with repetitions on a resource set in accordance with aspects of the present disclosure. As shown in FIG. 6B, the MAC CE may include a SP CSI-RS resource set ID, a startoffset list ID and TCI state IDs for CSI-RSs on the CSI-RS resource set and applied to all CSI-RS transmission repetitions in a period of the CSI-RS resource set.

Turning back to FIG. 4, in some example embodiments, the CSI-RSs 408 may be transmitted from the network entity 102 to the UE 104 on a resource set burst for transmission repetitions, the resource set burst may be based on the transmission configuration 405. For example, the transmission configuration 405 may include: a periodicity of a resource set burst for transmission repetitions, a time domain offset of the resource set burst, an ID of the resource set, a repetition number of the resource set, and a repetition period of the resource set.

In a more specific example, the CSI-RS resource configuration may be indicative of a CSI-RS resource set burst. The CSI-RS resource configuration may include the following parameters: a periodicity and a time domain offset of the burst; a CSI-RS resource set; the repetition number on the CSI-RS resource set; the repetition interval on the CSI-RS resource set. The UE 104 may determine a CSI-RS resource set burst based on the parameters of the periodicity and the offset of the burst, in which corresponding CSI-RS resource set is transmitted repeatedly. The repetition occasions and the number of the occasions may be determined based on the repetition number on the CSI-RS resource set and the repetition interval on the CSI-RS resource set.

FIG. 7 illustrates another example diagram of CSI-RS transmissions based on repetitions on a resource set in accordance with aspects of the present disclosure. In the example shown in FIG. 7, a CSI-RS resource set burst may be configured to a UE with a periodicity (40ms) and a time domain offset (0) of the burst, a CSI-RS resource set, the repetition number of the CSI-RS resource set (4) and the repetition interval of the CSI-RS resource set (5ms) . The CSI-RS resource set burst may be determined by based on the periodicity (40ms) and the time domain offset (0) . The first CSI-RS resource set repetition occasion in the burst starts from the beginning of the burst and a subsequent CSI-RS resource set repetition occasion starts after 5ms from the beginning of a previous CSI-RS resource set repetition occasion.

In some example embodiments, the transmission repetitions may be associated with at least one of the following: a same antenna port configuration; a same RE location; a same list of TCI state; or a same list of QCL-TypeD indication. In other words, all CSI-RS resource set repetitions in the CSI-RS resource set burst may have a same configuration, e.g., the same antenna port configuration, the same RE location and the same list of TCI state or the same list of QCL-TypeD indication.

In some example embodiments, the CSI-RS resource configuration 402 and the transmission configuration 405 may be carried in a radio resource control (RRC) signaling. For example, the CSI-RS resource set burst may be configured from the network entity 102 to the UE 104 by a signaling, e.g., a RRC signaling. The CSI-RS resource set burst may be configured together with corresponding CSI-RS resource set by RRC signaling, e.g., an information element of a NZP CSI-RS resource set.

In some example embodiments, the transmission configuration 405 may be carried in a medium access control (MAC) control element (CE) for activating the resource set. For example, the CSI-RS resource set burst may be configured from the network entity 102 to the UE 104 by a MAC CE, e.g., a MAC CE activating the corresponding CSI-RS resource set or a dedicated MAC CE indicative of the CSI-RS resource set burst.

In some example embodiments, the CSI-RS resource configuration 402 and the transmission configuration 405 may be carried in a RRC signaling and the transmission configuration 405 may be updated via a MAC CE. For example, the CSI-RS resource set burst may be configured together with the corresponding CSI-RS resource set by a signaling, e.g., a RRC signaling. The CSI-RS resource set burst may be updated by MAC CE.

In some example embodiments, the transmission configuration 405 may be configured based on a request from the UE 104. For example, the UE 104 may transmit a request for transmission configuration to the network entity 102. The request for transmission configuration may include one of the following: an indication of a model for a CSI prediction or a beam prediction; an indication of a CSI report configuration; or an indication of the CSI-RS resource configuration 402. The network entity 102 may transmit the transmission configuration 405 to the UE 104 based on the request from the UE 104. In a more specific example, the CSI-RS resource set burst may be configured based on UE request. The UE 104 may request the network entity 102 for the CSI-RS resource set burst by reporting information of a model applied in the functionality or information of required CSI-RS configuration combination. The information may be a model ID of an applied model or an identifier of a CSI report configuration or an identifier of CSI-RS configuration combination.

Turning back to FIG. 4, in some example embodiments, the CSI-RSs 408 may be transmitted from the network entity 102 to the UE 104 on the resource set at a plurality of transmission occasions in a transmission window. The transmission configuration 405 may include: a periodicity of the transmission window, a time length of the transmission window, and a time interval between two neighboring transmission occasions among the plurality of transmission occasions in the transmission window.

In other words, the occasions for CSI-RS transmissions on the resource set may be determined based on a CSI-RS resource set transmission window indicated by the network entity 102. Parameters for the CSI-RS resource set transmission window may include a transmission window length, a transmission window periodicity and a time interval. The transmission window length may indicate the length of the CSI-RS resource set transmission window. The transmission window periodicity may indicate the periodicity of the CSI-RS resource set transmission window. The time interval may indicate the time interval of two CSI-RS resource sets to be transmitted. In other words, the CSI-RS set may be transmitted with an interval equal to the “time interval” during the window with a length equal to the “transmission window length” . The window repeats with a periodicity equal to the “transmission window periodicity” until the UE receives a signalling to update the CSI-RS set transmission window or to release the CSI-RS set transmission window.

The CSI-RS resource set transmission window may be indicated by a signaling, e.g., a RRC signaling or a dedicated MAC CE, in which parameter values of the CSI-RS set transmission window are indicated directly. FIG. 8A illustrates an example structure of a MAC CE for a transmission configuration associated with a transmission window in accordance with aspects of the present disclosure. As shown in FIG. 8A, the MAC CE may include a transmission window length, a transmission window periodicity and a time interval of the transmission window.

In some example embodiments, the transmission configuration 405 may be configured based on a request from the UE 104. For example, the UE 104 may transmit a request for transmission configuration to the network entity 102. The request for transmission configuration may include one of the following: an indication of a model for a CSI prediction or a beam prediction; an indication of a CSI report configuration; or an indication of the CSI-RS resource configuration 402. The network entity 102 may transmit the transmission configuration 405 to the UE 104 based on the request from the UE 104. In a more specific example, the transmission window may be configured based on UE request. The UE 104 may request the network entity 102 for the transmission window by reporting information of a model applied in the functionality or information of required CSI-RS configuration combination. The information may be a model ID of an applied model or an identifier of a CSI report configuration or an identifier of CSI-RS configuration combination.

The UE 104 may receive the signalling to obtain the CSI-RS resource set transmission window and may receive CSI-RS of the P/SP CSI-RS resource set based on the CSI-RS set transmission window. The UE 104 shall assume that the CSI-RS set is transmitted with the interval of time interval during the window of length transmission window length.

In some example embodiments, the transmission window starts at a first time instance with an offset from a second time instance at which the transmission configuration 405 may be received, the offset may be configured by the network entity 102. The transmission window has the time length and may be repeated with the periodicity. A first transmission occasion among the plurality of transmission occasions may be a first occasion based on the CSI-RS resource configuration 402 from the first time instance. In other words, the time instance at which the first transmission window starts may be determined by an offset indicated to the UE by a signalling. In other words, the transmission window starts after the offset from the time instance of the successful reception of the signalling by the UE. The transmission window may repeat with the periodicity of transmission window periodicity until the UE receives another signalling to update the CSI-RS set transmission window or to release the CSI-RS set transmission window.

In an example implementation, a P/SP CSI-RS resource set with a periodicity of 5ms may be configured to the UE in a CSI-RS resource configuration, and a CSI-RS set transmission window may be configured to the UE in a transmission configuration. The transmission configuration may be carried in a MAC CE. Table 3 illustrates an example of a transmission configuration associated with a transmission window.

Table 3 Configuration of a CSI-RS set transmission window

FIG. 8B illustrates an example diagram of CSI-RS transmissions based on a transmission window in accordance with aspects of the present disclosure. The CSI-RS transmissions in FIG. 8B may be based on the example transmission configuration in Table 3.

In the example in FIG. 8B, a P/SP CSI-RS resource set with a periodicity of 5ms may be configured to the UE in a CSI-RS resource configuration. Assuming that the time instance that the UE successfully receives the signalling for the transmission window is Timeslot#n. In the first window with a length of 30 slots and starts from the Timeslot#n, the CSI-RSs may be transmitted on the CSI-RS resource set with an interval of 10 slots during the window. The window may be repeated with a periodicity of 60 slots until the UE receives another signalling to update the CSI-RS set transmission window or to release the CSI-RS set transmission window.

Turning back to FIG. 4, in some example embodiments, the CSI-RSs 408 may be transmitted from the network entity 102 to the UE 104 on the resource set at a plurality of transmission occasions. The plurality of transmission occasions may be associated with a transmission pattern. The transmission pattern may be associated with: a cycle length of the transmission pattern, the number of transmission occasions among the plurality of transmission occasions in the cycle length, and an occasion interval between two neighboring transmission occasions among the plurality of transmission occasions in the cycle length.

In other words, the occasions for CSI-RS transmissions on the resource set may be determined based on a CSI-RS resource set transmission pattern indicated by the network entity 102. Parameters for the CSI-RS resource set transmission pattern may include an interval of transmitted CSI-RS resource set (e.g., denoted as P) , a cycle length (e.g., denoted as K) and the number of transmitted CSI-RS resource set (e.g., denoted as Q) . The interval of transmitted CSI-RS resource set may indicate the interval of two CSI-RS sets to be transmitted. The unit of the interval may be the CSI-RS resource set occasion of corresponding CSI-RS resources set. For example, the interval “1” means two CSI-RS resource set occasions with CSI-RS transmission on the CSI-RS resource set are separated by a CSI-RS resource set occasion without CSI-RS transmission on the CSI-RS resource set. The cycle length may indicate the cycle length of the CSI-RS resource set transmission pattern. The number of transmitted CSI-RS resource set may indicate the number of occasions with CSI-RSs to be transmitted on the CSI-RS resource set in a cycle. In other words, in a cycle, CSI-RSs with a number equal to the “number of transmitted CSI-RS sets” are transmitted on the CSI-RS resource set with the interval equal to the “Interval of transmitted CSI-RS sets” between two transmitted CSI-RSs. The cycle is repeated with a length equal to the “cycle length” until the UE receives a signalling to update the CSI-RS set transmission pattern or to release the CSI-RS set transmission pattern.

In some example embodiments, the transmission configuration 405 may include an ID of the transmission pattern. The transmission pattern may be one among at least one pre-configured transmission pattern. For example, at least one supported CSI-RS set transmission pattern may be pre-configured by a RRC signaling, e.g., a pattern list. The network entity 102 may indicate an element of the pattern list through a codepoint carried in a MAC CE. FIG. 9A illustrates an example structure of a MAC CE for a transmission configuration associated with a transmission pattern in accordance with aspects of the present disclosure. As shown in FIG. 9A, the MAC CE may include a codepoint of the CSI-RS set transmission pattern.

Alternatively, the transmission configuration 405 may include the transmission pattern. In other words, the CSI-RS resource set transmission pattern may be indicated by a signaling, e.g., a RRC signaling or a dedicated MAC CE, in which parameter values of the CSI-RS set transmission pattern are indicated directly. FIG. 9B illustrates another example structure of a MAC CE for a transmission configuration associated with a transmission pattern in accordance with aspects of the present disclosure. As shown in FIG. 9B, the MAC CE may include an interval of transmitted CSI-RS resource set, a cycle length and the number of transmitted CSI-RS resource set of the transmission pattern.

In some example embodiments, the transmission configuration 405 may be configured based on a request from the UE 104. For example, the UE 104 may transmit a request for transmission configuration to the network entity 102. The request for transmission configuration may include one of the following: an indication of a model for a CSI prediction or a beam prediction; an indication of a CSI report configuration; or an indication of the CSI-RS resource configuration 402. The network entity 102 may transmit the transmission configuration 405 to the UE 104 based on the request from the UE 104. In a more specific example, the transmission pattern may be configured based on UE request. The UE 104 may request the network entity 102 for the transmission pattern by reporting information of a model applied in the functionality or information of required CSI-RS configuration combination. The information may be a model ID of an applied model or an identifier of a CSI report configuration or an identifier of CSI-RS configuration combination.

In some example embodiments, the transmission pattern starts at a first time instance with an offset from a second time instance at which the transmission configuration 405 may be received. The offset may be configured by the network entity 102. The CSI-RSs 408 may be received on the resource set at the plurality of transmission occasions with the number and the occasion interval in the transmission pattern. The transmission pattern may be repeated with the cycle length. A first transmission occasion among the plurality of transmission occasions may be a first occasion based on the CSI-RS resource configuration 402 from the first time instance.

For example, the UE 104 may receive the signalling to obtain the CSI-RS resource set transmission pattern and may receive CSI-RSs of the P/SP CSI-RS resource set based on the CSI-RS resource set transmission pattern. The UE 104 shall assume that in the first cycle starting from the successful reception of the signalling by the UE, Q CSI-RS sets are transmitted with the interval of P. The cycle may start from the UE receiving the signalling successfully and repeat with a cycle length K until the UE receives another signalling to update the CSI-RS set transmission pattern or to release the CSI-RS set transmission pattern.

In an example implementation, a P/SP CSI-RS resource set with a periodicity of 5ms may be configured to the UE in a CSI-RS resource configuration, and a CSI-RS set transmission pattern may be configured to the UE in a transmission configuration. The transmission configuration may be carried in a MAC CE. Table 4 illustrates an example of a transmission configuration associated with a transmission pattern.

Table 4 Configuration of a CSI-RS set transmission pattern

FIG. 9C illustrates an example diagram of CSI-RS transmissions based on a transmission pattern in accordance with aspects of the present disclosure. The CSI-RS transmissions in FIG. 9C may be based on the example transmission configuration in Table 4. In the example in FIG. 9C, a P/SP CSI-RS resource set with a periodicity of 5ms may be configured to the UE in a CSI-RS resource configuration. Assuming that the time instance that the UE successfully receives the signalling for the transmission window is Timeslot#n. Three CSI-RS sets shall be transmitted in a first cycle. The first CSI-RS may be transmitted in the first CSI-RS set occasion of the P/SP CSI-RS resource set after the Timeslot#n. The second CSI-RS may be transmitted in the third CSI-RS set occasion of the P/SP CSI-RS resource set with one CSI-RS set occasion interval from the first CSI-RS set occasion. The third CSI-RS may be transmitted in the fifth CSI-RS set occasion of the P/SP CSI-RS resource set with one CSI-RS set occasion interval from the third CSI-RS set occasion at which the second CSI-RS set is transmitted. The cycle may be repeated with a periodicity of 60 slots until the UE receives another signalling to update the CSI-RS set transmission pattern or to release the CSI-RS set transmission pattern.

Turning back to FIG. 4, in some example embodiments, the CSI-RSs 408 may be transmitted from the network entity 102 to the UE 104 on the resource set at a plurality of transmission occasions. The plurality of transmission occasions may be associated with a skipping list. The skipping list may include the number of occasions to be skipped between two neighboring transmission occasions among the plurality of transmission occasions.

In other words, the occasions on the P/SP CSI-RS resource set may be skipped based on a skipping list configured by the network entity 102. Each element of the skipping list may indicate the number of CSI-RS set transmission occasion to be skipped after a CSI-RS on the P/SP CSI-RS resource set is transmitted successfully. Further, the skipping list may be also continued in subsequent periods until the UE receives a signalling to update the skipping list or to release the skipping list.

In some example embodiments, the transmission configuration 405 may include an ID of the skipping list. The skipping list may be one among at least one pre-configured skipping list. For example, at least one preferred CSI-RS set skipping list may be pre-configured by a RRC signaling. The network entity 102 may indicate one of the pre-configured CSI-RS set skipping list through a codepoint carried in a MAC CE. FIG. 10A illustrates an example structure of a MAC CE for a transmission configuration associated with a skipping list in accordance with aspects of the present disclosure. As shown in FIG. 10A, the MAC CE may include a codepoint of the CSI-RS set skipping list.

Alternatively, the transmission configuration 405 may include the skipping list. In other words, the CSI-RS resource set skipping list may be indicated by a signaling, e.g., a RRC signaling or a dedicated MAC CE, in which the number (s) of skipped CSI-RS set transmission occasions is (are) indicated directly. FIG. 10B illustrates another example structure of a MAC CE for a transmission configuration associated with a skipping list in accordance with aspects of the present disclosure. As shown in FIG. 10B, the MAC CE may include the numbers of skipped CSI-RS set transmission occasions.

In some example embodiments, the transmission configuration 405 may be configured based on a request from the UE 104. For example, the UE 104 may transmit a request for transmission configuration to the network entity 102. The request for transmission configuration may include one of the following: an indication of a model for a CSI prediction or a beam prediction; an indication of a CSI report configuration; or an indication of the CSI-RS resource configuration 402. The network entity 102 may transmit the transmission configuration 405 to the UE 104 based on the request from the UE 104. In a more specific example, the skipping list may be configured based on UE request. The UE 104 may request the network entity 102 for the skipping list by reporting information of a model applied in the functionality or information of required CSI-RS configuration combination. The information may be a model ID of an applied model or an identifier of a CSI report configuration or an identifier of CSI-RS configuration combination.

In an example implementation, starting from the signaling carrying the skipping list is received successfully, the UE 104 may receive CSI-RS set of the P/SP CSI-RS resource set based on the skipping list. FIG. 10C illustrates an example diagram of CSI-RS transmissions based on a skipping list in accordance with aspects of the present disclosure. In the example in FIG. 10C, a P/SP CSI-RS resource set with a periodicity of 5ms may be configured to the UE in a CSI-RS resource configuration.

A skipping list {1, 1, 6} corresponding to the CSI-RS resource set may be configured to the UE by a MAC CE. The time instance that the UE successfully receives the signalling for the transmission window is Timeslot#n. Starting from Timeslot#n, based on the list of {1, 1, 6} , 1 CSI-RS set transmission occasion would be skipped after the first CSI-RS set transmission of the P/SP CSI-RS resource set, 1 CSI-RS set transmission occasion would be skipped after the second CSI-RS set transmission of the P/SP CSI-RS resource set, and 6 CSI-RS set transmission occasions would be skipped after the third CSI-RS set transmission of the P/SP CSI-RS resource set. Further, the skipping list may also be continued in subsequent periods, e.g., 1 CSI-RS set transmission occasion would be skipped after the fourth CSI-RS set transmission of the P/SP CSI-RS resource set and so one, until the UE receives another signalling to update the skipping list or to release the skipping list.

FIG. 11 illustrates an example of a device 1100 that supports configurations for CSI-RSs in accordance with aspects of the present disclosure. The device 1100 may be an example of a UE 104 or a network entity 102 as described herein. The device 1100 may support wireless communication with one or more network entities 102, UEs 104, or any combination thereof. The device 1100 may include components for bi-directional communications including components for transmitting and receiving communications, such as a processor 1102, a memory 1104, a transceiver 1106, and, optionally, an I/O controller 1108. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .

The processor 1102, the memory 1104, the transceiver 1106, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. For example, the processor 1102, the memory 1104, the transceiver 1106, or various combinations or components thereof may support a method for performing one or more of the operations described herein.

In some implementations, the processor 1102, the memory 1104, the transceiver 1106, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include a processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some implementations, the processor 1102 and the memory 1104 coupled with the processor 1102 may be configured to perform one or more of the functions described herein (e.g., executing, by the processor 1102, instructions stored in the memory 1104) .

In an example in which the device 1100 is implemented as a UE 104, the processor 1102 may support wireless communication at the device 1100 in accordance with examples as disclosed herein. The processor 1102 may be configured to operable to support a means for receiving, from a network device, a CSI-RS resource configuration associated with a plurality of resource sets; and a means for receiving, from the network device, CSI-RSs on the plurality of resource sets.

In another example in which the device 1100 is implemented as a UE 104, the processor 1102 may support wireless communication at the device 1100 in accordance with examples as disclosed herein. The processor 1102 may be configured to operable to support a means for receiving, from a network device, a CSI-RS resource configuration associated with a resource set; a means for receiving, from the network device, a transmission configuration associated with the resource set; and a means for receiving, from a network device, on the resource set based on the transmission configuration.

In an example in which the device 1100 is implemented as a network entity 102, the processor 1102 may support wireless communication at the device 1100 in accordance with examples as disclosed herein. The processor 1102 may be configured to operable to support a means for transmitting, to a UE, a CSI-RS resource configuration associated with a plurality of resource sets; and a means for transmitting, to the UE, CSI-RSs on the plurality of resource sets.

In another example in which the device 1100 is implemented as network entity 102, the processor 1102 may support wireless communication at the device 1100 in accordance with examples as disclosed herein. The processor 1102 may be configured to operable to support a means for transmitting, to a UE, a CSI-RS resource configuration associated with a resource set; a means for transmitting, to the UE, a transmission configuration associated with the resource set; and a means for transmitting, to the UE, on the resource set based on the transmission configuration.

The processor 1102 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) . In some implementations, the processor 1102 may be configured to operate a memory array using a memory controller. In some other implementations, a memory controller may be integrated into the processor 1102. The processor 1102 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1104) to cause the device 1100 to perform various functions of the present disclosure such that the device 1100 may perform any process of the disclosure as discussed with reference to FIGS. 2 to 10C.

The memory 1104 may include random access memory (RAM) and read-only memory (ROM) . The memory 1104 may store computer-readable, computer-executable code including instructions that, when executed by the processor 1102 cause the device 1100 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some implementations, the code may not be directly executable by the processor 1102 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some implementations, the memory 1104 may include, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.

The I/O controller 1108 may manage input and output signals for the device 1100. The I/O controller 1108 may also manage peripherals not integrated into the device M02. In some implementations, the I/O controller 1108 may represent a physical connection or port to an external peripheral. In some implementations, the I/O controller 1108 may utilize an operating system such as or another known operating system. In some implementations, the I/O controller 1108 may be implemented as part of a processor, such as the processor 1106. In some implementations, a user may interact with the device 1100 via the I/O controller 1108 or via hardware components controlled by the I/O controller 1108.

In some implementations, the device 1100 may include a single antenna 1110. However, in some other implementations, the device 1100 may have more than one antenna 1110 (i.e., multiple antennas) , including multiple antenna panels or antenna arrays, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 1106 may communicate bi-directionally, via the one or more antennas 1110, wired, or wireless links as described herein. For example, the transceiver 1106 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 1106 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 1110 for transmission, and to demodulate packets received from the one or more antennas 1110. The transceiver 1106 may include one or more transmit chains, one or more receive chains, or a combination thereof.

A transmit chain may be configured to generate and transmit signals (e.g., control information, data, packets) . The transmit chain may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM) , frequency modulation (FM) , or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM) . The transmit chain may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium. The transmit chain may also include one or more antennas 1110 for transmitting the amplified signal into the air or wireless medium.

A receive chain may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, the receive chain may include one or more antennas 1110 for receive the signal over the air or wireless medium. The receive chain may include at least one amplifier (e.g., a low-noise amplifier (LNA) ) configured to amplify the received signal. The receive chain may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal. The receive chain may include at least one decoder for decoding the processing the demodulated signal to receive the transmitted data.

FIG. 12 illustrates an example of a processor 1200 that supports configurations for CSI-RSs in accordance with aspects of the present disclosure. The processor 1200 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 1200 may be implemented in a device or its components as described herein. For example, the device may be an example of a UE 104 or a network entity 102 as described herein. The processor 1200 may include a controller 1202 configured to perform various operations in accordance with examples as described herein. The processor 1200 may optionally include at least one memory 1204, such as L1/L2/L3 cache. Additionally, or alternatively, the processor 1200 may optionally include one or more arithmetic-logic units (ALUs) 1200. One or more of these components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .

The processor 1200 may be a processor chipset and include a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) in accordance with examples as described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory local to or included in the processor chipset (e.g., the processor 1200) or other memory (e.g., random access memory (RAM) , read-only memory (ROM) , dynamic RAM (DRAM) , synchronous dynamic RAM (SDRAM) , static RAM (SRAM) , ferroelectric RAM (FeRAM) , magnetic RAM (MRAM) , resistive RAM (RRAM) , flash memory, phase change memory (PCM) , and others) .

The controller 1202 may be configured to manage and coordinate various operations (e.g., signaling, receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 1200 to cause the processor 1200 to support various operations in accordance with examples as described herein. For example, the controller 1202 may operate as a control unit of the processor 1200, generating control signals that manage the operation of various components of the processor 1200. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.

The controller 1202 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 1204 and determine subsequent instruction (s) to be executed to cause the processor 1200 to support various operations in accordance with examples as described herein. The controller 1202 may be configured to track memory address of instructions associated with the memory 1204. The controller 1202 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 1202 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 1200 to cause the processor 1200 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 1202 may be configured to manage flow of data within the processor 1200. The controller 1202 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 1200.

The memory 1204 may include one or more caches (e.g., memory local to or included in the processor 1200 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementation, the memory 1204 may reside within or on a processor chipset (e.g., local to the processor 1200) . In some other implementations, the memory 1204 may reside external to the processor chipset (e.g., remote to the processor 1200) .

The memory 1204 may store computer-readable, computer-executable code including instructions that, when executed by the processor 1200, cause the processor 1200 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. The controller 1202 and/or the processor 1200 may be configured to execute computer-readable instructions stored in the memory 1204 to cause the processor 1200 to perform various functions. For example, the processor 1200 and/or the controller 1202 may be coupled with or to the memory 1204, and the processor 1200, the controller 1202, and the memory 1204 may be configured to perform various functions described herein. In some examples, the processor 1200 may include multiple processors and the memory 1204 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein.

The one or more ALUs 1200 may be configured to support various operations in accordance with examples as described herein. In some implementation, the one or more ALUs 1200 may reside within or on a processor chipset (e.g., the processor 1200) . In some other implementations, the one or more ALUs 1200 may reside external to the processor chipset (e.g., the processor 1200) . One or more ALUs 1200 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 1200 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 1200 be configured with a variety of logical and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate the data according to the operation. Additionally, or alternatively, the one or more ALUs 1200 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 1200 to handle conditional operations, comparisons, and bitwise operations.

The processor 1200 may support wireless communication in accordance with examples as disclosed herein. In an example in which the device 1100 is implemented as a UE 104, the processor 1200 may be configured to or operable to support a means for receiving, from a network device, a CSI-RS resource configuration associated with a plurality of resource sets; and a means for receiving, from the network device, CSI-RSs on the plurality of resource sets. In another example in which the device 1100 is implemented as a UE 104, the processor 1200 may be configured to or operable to support a means for receiving, from a network device, a CSI-RS resource configuration associated with a resource set; a means for receiving, from the network device, a transmission configuration associated with the resource set; and a means for receiving, from a network device, on the resource set based on the transmission configuration.

In an example in which the device 1100 is implemented as a network entity 102, the processor 1200 may be configured to or operable to support a means for transmitting, to a UE, a CSI-RS resource configuration associated with a plurality of resource sets; and a means for transmitting, to the UE, CSI-RSs on the plurality of resource sets. In another example in which the device 1100 is implemented as a network entity 102, the processor 1200 may be configured to or operable to support a means for transmitting, to a UE, a CSI-RS resource configuration associated with a resource set; a means for transmitting, to the UE, a transmission configuration associated with the resource set; and a means for transmitting, to the UE, on the resource set based on the transmission configuration.

FIG. 13 illustrates a flowchart of a method 1300 that supports configurations for CSI-RSs in accordance with aspects of the present disclosure. The operations of the method 1300 may be implemented by a device or its components as described herein. For example, the operations of the method 1300 may be performed by a UE 104 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.

At 1305, the method may include receiving, from a network device, a CSI-RS resource configuration associated with a plurality of resource sets. The operations of 1305 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1305 may be performed by a device as described with reference to FIG. 1.

At 1310, the method may include receiving, from the network device, CSI-RSs on the plurality of resource sets. The operations of 1310 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1310 may be performed by a device as described with reference to FIG. 1.

FIG. 14 illustrates a flowchart of a method 1400 that supports configurations for CSI-RSs in accordance with aspects of the present disclosure. The operations of the method 1400 may be implemented by a device or its components as described herein. For example, the operations of the method 1400 may be performed by a UE 104 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.

At 1405, the method may include receiving, from a network device, a CSI-RS resource configuration associated with a resource set. The operations of 1405 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1405 may be performed by a device as described with reference to FIG. 1.

At 1410, the method may include receiving, from the network device, a transmission configuration associated with the resource set. The operations of 1410 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1410 may be performed by a device as described with reference to FIG. 1.

At 1415, the method may include receiving, from a network device, on the resource set based on the transmission configuration. The operations of 1415 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1415 may be performed by a device as described with reference to FIG. 1.

FIG. 1500 illustrates a flowchart of a method 1500 that supports configurations for CSI-RSs in accordance with aspects of the present disclosure. The operations of the method 1500 may be implemented by a device or its components as described herein. For example, the operations of the method 1500 may be performed by a network entity 102 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.

At 1505, the method may include transmitting, to a UE, a CSI-RS resource configuration associated with a plurality of resource sets. The operations of 1505 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1505 may be performed by a device as described with reference to FIG. 1.

At 1510, the method may include transmitting, to the UE, CSI-RSs on the plurality of resource sets. The operations of 1510 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1510 may be performed by a device as described with reference to FIG. 1.

FIG. 16 illustrates a flowchart of a method 1600 that supports configurations for CSI-RSs in accordance with aspects of the present disclosure. The operations of the method 1600 may be implemented by a device or its components as described herein. For example, the operations of the method 1600 may be performed by a network entity 102 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware. In some embodiments, the method 1600 may be performed before the method 1200.

At 1605, the method may include transmitting, to a UE, a CSI-RS resource configuration associated with a resource set . The operations of 1605 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1605 may be performed by a device as described with reference to FIG. 1.

At 1610, the method may include transmitting, to the UE, a transmission configuration associated with the resource set . The operations of 1610 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1610 may be performed by a device as described with reference to FIG. 1.

At 1615, the method may include transmitting, to the UE, on the resource set based on the transmission configuration. The operations of 1615 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1615 may be performed by a device as described with reference to FIG. 1.

It should be noted that the methods described herein describes possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.

The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.

Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.

As used herein, including in the claims, an article “a” before an element is unrestricted and understood to refer to “at least one” of those elements or “one or more” of those elements. The terms “a, ” “at least one, ” “one or more, ” and “at least one of one or more” may be interchangeable. As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” or “one or both of” ) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. Further, as used herein, including in the claims, a “set” may include one or more elements.

The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.

Claims

A user equipment, comprising:

a processor; and

a transceiver coupled to the processor,

wherein the processor is configured to:

receive, from a network device via the transceiver, a channel state information reference signal (CSI-RS) resource configuration associated with a resource set;

receive, from the network device via the transceiver, a transmission configuration associated with the resource set; and

receive, from the network device via the transceiver, CSI-RSs on the resource set based on the transmission configuration.
The user equipment of claim 1, wherein receiving the CSI-RSs comprises:

receiving, from the network device via the transceiver, the CSI-RSs on the resource set at a plurality of occasions for transmission repetitions,

wherein the transmission configuration is indicative of at least one offset from a start point of a first occasion in the plurality of occasions,

wherein the first occasion is associated with a periodicity of the resource set and a time domain offset of the resource set; and

wherein at least one occasion in the plurality of occasions subsequent to the first occasion is associated with the first occasion and the at least one offset.
The user equipment of claim 1, wherein receiving the CSI-RSs comprises:

receiving, from the network device via the transceiver, the CSI-RSs on the resource set at a plurality of occasions for transmission repetitions,

wherein the transmission configuration is indicative of one of the following:

a plurality of offsets from a start point of a transmission period comprising the plurality of occasions, wherein the plurality of occasions are associated with a periodicity of the resource set, a time domain offset of the resource set and the plurality of offsets; or

at least one offset from a start point of a previous occasion in the plurality of occasions, wherein at least one occasion in the plurality of occasions subsequent to a first occasion is associated with the previous occasion and the at least one offset, and wherein the first occasion is associated with a periodicity of the resource set and a time domain offset of the resource set.
The user equipment of claim 2 or 3, wherein the transmission configuration comprises:

an identifier (ID) of the resource set; and

an ID of a list of the offsets, wherein the list is one among at least one pre-configured list.
The user equipment of claim 4, wherein the transmission configuration further comprises:

an ID of a list of transmission control indicator (TCI) state for the CSI-RSs applied to the transmission repetitions.
The user equipment of claim 1, wherein receiving the CSI-RSs comprises:

receiving, from the network device via the transceiver, the CSI-RSs on a resource set burst for transmission repetitions, the resource set burst is based on the transmission configuration,

wherein the transmission configuration comprises:

a periodicity of the resource set burst,

a time domain offset of the resource set burst,

an ID of the resource set,

a repetition number of the resource set, and

a repetition period of the resource set.
The user equipment of any of claim 2-6, wherein the transmission repetitions are associated with at least one of the following:

a same antenna port configuration;

a same resource element (RE) location;

a same list of TCI state; or

a same list of quasi-colocation type D (QCL-TypeD) indication.
The user equipment of claim 1, wherein a transmission of the CSI-RS resource configuration and the transmission configuration comprises one of the following:

the CSI-RS resource configuration and the transmission configuration being carried in a radio resource control (RRC) signaling;

the transmission configuration being carried in a medium access control (MAC) control element (CE) for activating the resource set; or

the CSI-RS resource configuration and the transmission configuration being carried in a RRC signaling and the transmission configuration is updated via a MAC CE.
The user equipment of claim 1, wherein:

the resource set comprises a plurality of CSI-RS resources, and

the transmission configuration is indicative of at least one time interval between two adjacent CSI-RS resources of the resource set or between two adjacent groups of CSI-RS resources of the resource set.
The user equipment of claim 1, wherein receiving the CSI-RSs comprises:

receiving, from the network device via the transceiver, the CSI-RSs on the resource set at a plurality of transmission occasions in a transmission window, wherein the transmission configuration comprises:

a periodicity of the transmission window,

a time length of the transmission window, and

a time interval between two neighboring transmission occasions among the plurality of transmission occasions in the transmission window.
The user equipment of claim 10, wherein the transmission window starts at a first time instance with an offset from a second time instance at which the transmission configuration is received, the offset is configured by the network device,

wherein the transmission window has the time length and is repeated with the periodicity, and

wherein a first transmission occasion among the plurality of transmission occasions is a first occasion based on the CSI-RS resource configuration from the first time instance.
The user equipment of claim 1, wherein receiving the CSI-RSs comprises:

receiving, from the network device via the transceiver, the CSI-RSs on the resource set at a plurality of transmission occasions, wherein the plurality of transmission occasions are associated with a transmission pattern,

wherein the transmission pattern is associated with:

a cycle length of the transmission pattern,

a number of transmission occasions among the plurality of transmission occasions in the cycle length, and

an occasion interval between two neighboring transmission occasions among the plurality of transmission occasions in the cycle length,

wherein the transmission configuration comprises one of the following:

the transmission pattern, or

an ID of the transmission pattern, wherein the transmission pattern is one among at least one pre-configured transmission pattern.
The user equipment of claim 12, wherein the transmission pattern starts at a first time instance with an offset from a second time instance at which the transmission configuration is received, the offset is configured by the network device,

wherein the CSI-RSs are received on the resource set at the plurality of transmission occasions with the number and the occasion interval in the transmission pattern,

wherein the transmission pattern is repeated with the cycle length, and

wherein a first transmission occasion among the plurality of transmission occasions is a first occasion based on the CSI-RS resource configuration from the first time instance.
The user equipment of claim 1, wherein receiving the CSI-RSs comprises:

receiving, from the network device via the transceiver, the CSI-RSs on the resource set at a plurality of transmission occasions, wherein the plurality of transmission occasions are associated with a skipping list, and the skipping list comprises the number of occasions to be skipped between two neighboring transmission occasions among the plurality of transmission occasions,

wherein the transmission configuration comprises one of the following:

the skipping list, or

an ID of the skipping list, wherein the skipping list is one among at least one pre-configured skipping list.
The user equipment of claim 1, wherein receiving the CSI-RSs comprises:

receiving, from the network device via the transceiver, the CSI-RSs on the resource set based on the transmission configuration periodically before an updated transmission configuration or an indication to release the transmission configuration is received.
The user equipment of claim 1, wherein the processor is further configured to:

prior to receiving the transmission configuration, transmit, to the network device via the transceiver, a request for transmission configuration comprising one of the following:

an indication of a model for a CSI prediction or a beam prediction;

an indication of a CSI report configuration; or

an indication of the CSI-RS resource configuration.
The user equipment of claim 1, wherein the processor is further configured to:

prior to receiving the CSI-RS resource configuration, transmit, to the network device via the transceiver, an indication of at least one measurement and prediction pattern, wherein each of the at least one measurement and prediction pattern is associated with a respective model for a CSI prediction or a beam prediction.
A network device, comprising:

a processor; and

a transceiver coupled to the processor,

wherein the processor is configured to:

transmit, to a user equipment via the transceiver, a channel state information reference signal (CSI-RS) resource configuration associated with a resource set;

transmit, to the user equipment via the transceiver, a transmission configuration associated with the resource set; and

transmit, to the user equipment via the transceiver, CSI-RSs on the resource set based on the transmission configuration.
A method performed by a user equipment, comprising:

receiving, from a network device, a channel state information reference signal (CSI-RS) resource configuration associated with a resource set;

receiving, from the network device, a transmission configuration associated with the resource set; and

receiving, from the network device, CSI-RSs on the resource set based on the transmission configuration.
A method performed by a network device, comprising:

transmitting, to a user equipment, a channel state information reference signal (CSI-RS) resource configuration associated with a resource set;

transmitting, to the user equipment, a transmission configuration associated with the resource set; and

transmitting, to the user equipment, CSI-RSs on the resource set based on the transmission configuration.