System and method for channel measurement and reporting for different TRP on-off scenarios
The method configures measurement resources for channel and interference measurements in wireless networks with dynamic TRP states, ensuring accurate reporting and efficient network operation by optimizing TRP states based on interference changes.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- HUAWEI TECH CO LTD
- Filing Date
- 2025-04-07
- Publication Date
- 2026-07-23
AI Technical Summary
In wireless networks with dynamic TRP ON/OFF scenarios, interference changes affect communication channels, necessitating improved methods for accurate channel and interference measurements to maintain performance without energy wastage.
A method and apparatus for configuring measurement resources that associate channel and interference measurement resources with network devices, enabling precise channel state information reporting to optimize network operations.
Enables accurate channel and interference measurements in varying interference scenarios, allowing for efficient scheduling and energy management by dynamically adjusting TRP states.
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Figure CN2025087591_23072026_PF_FP_ABST
Abstract
Description
SYSTEM AND METHOD FOR CHANNEL MEASUREMENT AND REPORTING FOR DIFFERENT TRP ON-OFF SCENARIOSCROSS-REFERENCE TO RELATED APPLICATION
[0001] The present application is related to, and claims priority to, United States provisional patent application Serial No. 63 / 745,478, entitled “System and method for channel measurement and reporting for different TRP ON-OFF scenarios” , filed on January 15, 2025, the entire contents of which are hereby incorporated by reference.TECHNICAL FIELD
[0002] The present application relates to wireless communication networks, and more specifically to methods and systems for channel measurement and / or reporting including consideration of interference measurements.BACKGROUND
[0003] In future wireless network, a communication system could comprise different types of transmit point (TP) nodes including both base station and Transmit Receive Point (TRP) (either a remote antenna head or a simple transmit / receive point) . The TP may also be a TRP. The function of each TRP could be different, some used for coverage enhancement, and some used for capacity enhancement, the coverage of each TRP could be overlapped as well. More component carriers (CC) could also be used to expand the frequency bandwidth. From the energy saving perspective, certain TRP could be turned ON / OFF and such behaviors could be quite dynamic to save both network and user equipment (UE) energy without sacrificing the performance. However, having one or more TRPs turning ON or OFF may affect (e.g. by changing the interference) a communication channel between a UE and a TRP.SUMMARY
[0004] The present disclosure provides, among other features and implementations, a communication method and apparatus to configure measurement resources for channel measurements (CMs) and interference measurements (IMs) . For example, measurement resource configuration may associate a channel measurement resource (CMR) with a plurality of interference measurement resources (IMRs) . The channel measurement resource may correspond to a channel measurement associated with a first network device (e.g., a serving TRP) . Each of the plurality of interference measurement resources corresponds to a respective interference measurement in a plurality of interference measurements.
[0005] Alternatively, in some applications, measurement resource configuration may associate a plurality of channel measurement resources with a first network device (e.g., a serving TRP) . Each of the plurality of channel measurement resources corresponds to a respective interference measurement.
[0006] Such measurement resource configuration may enable channel measurements and interference measurements to be performed accurately in various interference scenarios, such as in different interference assumptions.
[0007] In some examples, a respective interference measurement may be performed based on a corresponding one of the plurality of interference measurement resources. A channel state information (CSI) report may be further transmitted based on the channel measurement resource and the plurality of interference measurement resources.
[0008] In other examples, a respective interference measurement may be performed based on received reference signals and a corresponding one of the plurality of channel measurement resources. A CSI report may be further transmitted based on the plurality of channel measurement resources.
[0009] In some implementations, each interference assumption may be associated with a configuration of one or more second network devices (e.g., interference TRPs) .
[0010] Some implementations may involve scheduling information for data based on the CSI report.
[0011] Some implementations may involve scheduling information for the one or more second network devices based on the CSI report.
[0012] In some implementations, a method and / or other features disclosed herein may be applied in a user-centric cell-free (UCCF) communications system.
[0013] According to a first aspect, a communication method is described. The method may be applied at a terminal side, for example, a terminal or a module in a terminal, a circuit or a chip (for example, a modem chip, also referred to as a baseband chip, or a system on chip (SoC) chip or a system in package (SIP) chip that includes a modem core) that is responsible for a communication function in a terminal. For example, such a method may involve receiving measurement resource configuration that associates a channel measurement resource with a plurality of interference measurement resources, wherein the channel measurement resource corresponds to a channel measurement associated with a first network device, and each of the plurality of interference measurement resources corresponds to a respective interference measurement in a plurality of interference measurements.
[0014] In some embodiments, the method may further involve receiving one or more first reference signals for the channel measurement associated with the first network device; and performing the channel measurement associated with the first network device based on the received one or more first reference signals and the channel measurement resource.
[0015] In some embodiments, wherein each of the one or more first reference signal comprises a non-zero-power channel state information reference signal.
[0016] In some embodiments, wherein the respective interference measurement is associated with a corresponding configuration of one or more second network devices.
[0017] In some embodiments, the method may further involve performing the respective interference measurement based on a corresponding interference measurement resource.
[0018] In some embodiments, the method may further involve performing additional interference measurements associated with another corresponding configuration of the one or more second network devices based on the plurality of interference measurement resources.
[0019] In some embodiments, wherein each of the plurality of interference measurement resources comprises a channel state information interference measurement resource.
[0020] In some embodiments, the method may further involve transmitting a channel state information report based on the channel measurement resource and the plurality of interference measurement resources.
[0021] In some embodiments, the method may further involve transmitting a channel state information report based on the plurality of channel measurement resources.
[0022] In some embodiments, wherein the channel state information report comprises at least one of: channel state information reference signal resource indicator; rank indicator; precoding matrix indicator; layer indicator; and channel quality indicator.
[0023] In some embodiments, wherein the channel state information report comprises a plurality of sub-reports, and each of the plurality of sub-reports corresponds to the respective interference measurement.
[0024] In some embodiments, wherein each of the plurality of sub-reports comprises a respective channel state information associated with the respective interference measurement.
[0025] In some embodiments, wherein the channel state information report comprises a first parameter set for channel state information for the plurality of interference measurements and a respective set of second parameter sets for each respective interference measurement.
[0026] In some embodiments, wherein the channel state information report comprises a base channel state information report and a respective differential channel quality indicator for each respective interference measurement.
[0027] In some embodiments, wherein the channel state information report comprises a first reference signal received power and respective differential reference signal received powers with respect to the first reference signal received power for each respective interference measurement.
[0028] In some embodiments, wherein the channel state information report comprises a first signal-to-interference-plus-noise ratio and respective differential signal-to-interference-plus-noise ratios with respect to the first signal-to-interference-plus-noise ratio for each respective interference measurement.
[0029] In some embodiments, the method may further involve receiving scheduling information for data based on the channel state information report.
[0030] In some embodiments, the method may further involve receiving scheduling information for data based on the channel state information report.
[0031] In some embodiments, wherein the configuration of one or more second network devices is related to: a second network device of the one or more second network devices being configured to be in an ON state or in an OFF state; or a second network device of the one or more second network devices being configured to be in a woken-up state or in a sleep state.
[0032] According to a second aspect, a communication method is described. The method may be applied at a terminal side, for example, a terminal or a module in a terminal, a circuit or a chip (for example, a modem chip, also referred to as a baseband chip, or a system on chip (SoC) chip or a system in package (SIP) chip that includes a modem core) that is responsible for a communication function in a terminal. For example, such a method may involve receiving measurement resource configuration that associates a plurality of channel measurement resources with a first network device, wherein each of the plurality of channel measurement resources corresponds to a respective interference measurement in a plurality of interference measurements.
[0033] In some embodiments, wherein the plurality of channel measurement resources also corresponds to a channel measurement associated with the first network device.
[0034] In some embodiments, the method may further involve receiving one or more first reference signals for the respective interference measurement.
[0035] In some embodiments, the method may further involve performing the respective interference measurement based on the received one or more first reference signals and a corresponding channel measurement resource.
[0036] In some embodiments, the method may further involve performing additional interference measurement based on the received one or more first reference signals and the plurality of channel measurement resources.
[0037] In some embodiments, the method may further involve transmitting a channel state information report based on the channel measurement resource and the plurality of interference measurement resources.
[0038] In some embodiments, the method may further involve transmitting a channel state information report based on the plurality of channel measurement resources.
[0039] In some embodiments, wherein the channel state information report comprises at least one of: channel state information reference signal resource indicator; rank indicator; precoding matrix indicator; layer indicator; and channel quality indicator.
[0040] In some embodiments, wherein the channel state information report comprises a plurality of sub-reports, and each of the plurality of sub-reports corresponds to the respective interference measurement.
[0041] In some embodiments, wherein each of the plurality of sub-reports comprises a respective channel state information associated with the respective interference measurement.
[0042] In some embodiments, wherein the channel state information report comprises a first parameter set for channel state information for the plurality of interference measurements and a respective set of second parameter sets for each respective interference measurement.
[0043] In some embodiments, wherein the channel state information report comprises a base channel state information report and a respective differential channel quality indicator for each respective interference measurement.
[0044] In some embodiments, wherein the channel state information report comprises a first reference signal received power and respective differential reference signal received powers with respect to the first reference signal received power for each respective interference measurement.
[0045] In some embodiments, wherein the channel state information report comprises a first signal-to-interference-plus-noise ratio and respective differential signal-to-interference-plus-noise ratios with respect to the first signal-to-interference-plus-noise ratio for each respective interference measurement.
[0046] In some embodiments, the method may further involve receiving scheduling information for data based on the channel state information report.
[0047] In some embodiments, wherein the configuration of one or more second network devices is related to: a second network device of the one or more second network devices being configured to be in an ON state or in an OFF state; or a second network device of the one or more second network devices being configured to be in a woken-up state or in a sleep state.
[0048] According to a third aspect, a method may be applied to a network side, for example, a location server or a component (for example, a circuit, a chip, or a chip system) in a location server on a network side. For example, such a method may involve transmitting measurement resource configuration that associates a channel measurement resource with a plurality of interference measurement resources, wherein the channel measurement resource corresponds to a channel measurement associated with a first network device, and each of the plurality of interference measurement resources corresponds to a respective interference measurement.
[0049] In some embodiments, the method may further involve transmitting one or more first reference signals for the channel measurement associated with the first network device.
[0050] In some embodiments, wherein each of the one or more first reference signal comprises a non-zero-power channel state information reference signal.
[0051] In some embodiments, wherein the respective interference measurement is associated with a corresponding configuration of one or more second network devices.
[0052] In some embodiments, wherein each of the plurality of interference measurement resources comprises a channel state information interference measurement resource.
[0053] In some embodiments, the channel state information report comprises at least one of: channel state information reference signal resource indicator; rank indicator; precoding matrix indicator; layer indicator; and channel quality indicator.
[0054] In some embodiments, wherein the channel state information report comprises a plurality of sub-reports, and each of the plurality of sub-reports corresponds to the respective interference measurement.
[0055] In some embodiments, wherein each of the plurality of sub-reports comprises a respective channel state information associated with the respective interference measurement.
[0056] In some embodiments, wherein the channel state information report comprises a first parameter set for channel state information for the plurality of interference measurements and a respective set of second parameter sets for each respective interference measurement.
[0057] In some embodiments, wherein the channel state information report comprises a base channel state information report and a respective differential channel quality indicator for each respective interference measurement.
[0058] In some embodiments, wherein the channel state information report comprises a first reference signal received power and respective differential reference signal received powers with respect to the first reference signal received power for each respective interference measurement.
[0059] In some embodiments, wherein the channel state information report comprises a first signal-to-interference-plus-noise ratio and respective differential signal-to-interference-plus-noise ratios with respect to the first signal-to-interference-plus-noise ratio for each respective interference measurement.
[0060] In some embodiments, the method may further involve comprising transmitting scheduling information for data based on channel state information report.
[0061] In some embodiments, the method may further involve transmitting scheduling information for the one or more second network devices based on the channel state information report.
[0062] In some embodiments, wherein the scheduling information comprises information to: configuring a second network device of the one or more second network devices to be in an ON state or in an OFF state; or configuring a second network device of the one or more second network devices to be in a woken-up state or in a sleep state.
[0063] According to a fourth aspect, a method may be applied to a network side, for example, a location server or a component (for example, a circuit, a chip, or a chip system) in a location server on a network side. For example, such a method may involve transmitting measurement resource configuration that associates a plurality of channel measurement resources with a first network device, wherein each of the plurality of channel measurement resources corresponds to a respective interference measurement in a plurality of interference measurements.
[0064] In some embodiments, wherein the plurality of channel measurement resources also corresponds to a channel measurement associated with the first network device.
[0065] In some embodiments, the method may further involve transmitting one or more first reference signals for the respective interference measurement.
[0066] In some embodiments, the method may further involve receiving a channel state information report based on the channel measurement resource and the plurality of interference measurement resources.
[0067] In some embodiments, the method may further involve receiving a channel state information report based on the plurality of channel measurement resources.
[0068] In some embodiments, the channel state information report comprises at least one of: channel state information reference signal resource indicator; rank indicator; precoding matrix indicator; layer indicator; and channel quality indicator.
[0069] In some embodiments, wherein the channel state information report comprises a plurality of sub-reports, and each of the plurality of sub-reports corresponds to the respective interference measurement.
[0070] In some embodiments, wherein each of the plurality of sub-reports comprises a respective channel state information associated with the respective interference measurement.
[0071] In some embodiments, wherein the channel state information report comprises a first parameter set for channel state information for the plurality of interference measurements and a respective set of second parameter sets for each respective interference measurement.
[0072] In some embodiments, wherein the channel state information report comprises a base channel state information report and a respective differential channel quality indicator for each respective interference measurement.
[0073] In some embodiments, wherein the channel state information report comprises a first reference signal received power and respective differential reference signal received powers with respect to the first reference signal received power for each respective interference measurement.
[0074] In some embodiments, wherein the channel state information report comprises a first signal-to-interference-plus-noise ratio and respective differential signal-to-interference-plus-noise ratios with respect to the first signal-to-interference-plus-noise ratio for each respective interference measurement.
[0075] In some embodiments, the method may further involve comprising transmitting scheduling information for data based on channel state information report.
[0076] In some embodiments, the method may further involve transmitting scheduling information for the one or more second network devices based on the channel state information report.
[0077] In some embodiments, wherein the scheduling information comprises information to: configuring a second network device of the one or more second network devices to be in an ON state or in an OFF state; or configuring a second network device of the one or more second network devices to be in a woken-up state or in a sleep state.
[0078] According to a fifth aspect, a communication apparatus is described. The communication apparatus has a function of implementing the first aspect or the second aspect. For example, the communication apparatus includes a corresponding module, unit, or means for performing operations in the first aspect or in the second aspect. The module, unit, or means may be specifically implemented by using software, may be implemented by using hardware, or may be implemented by using software in combination with hardware.
[0079] According to a sixth aspect, an apparatus is described. The apparatus may comprise one or more processors; and a memory storing instructions which, when executed by the one or more processors, cause the apparatus to perform the method of any one of operations in the first or the second aspects.
[0080] According to a seventh aspect, a communication apparatus is described. The communication apparatus has a function of implementing the third aspect or the fourth aspect. For example, the communication apparatus includes a corresponding module, unit, or means for performing operations in the first aspect or in the second aspect. The module, unit, or means may be specifically implemented by using software, may be implemented by using hardware, or may be implemented by using software in combination with hardware.
[0081] According to an eighth aspect, an apparatus is described. The apparatus may comprise one or more processors; and a memory storing instructions which, when executed by the one or more processors, cause the apparatus to perform the method of any one of operations in the third or the fourth aspects.
[0082] According to a nineth aspect, a communication apparatus is described. The communication apparatus, configured to perform the method of any one of operations in the first, second, third or fourth aspects.
[0083] In some embodiments, the communication apparatus may further include an interface circuit, and the processor is configured to communicate with another apparatus or component through the interface circuit.
[0084] In some embodiments, the communication apparatus may further include a memory. The communication apparatus may be a terminal, a module in a terminal, or a chip responsible for a communication function in a terminal, for example, a modem chip (also referred to as a baseband chip) or an SoC chip or an SIP chip that includes a modem module.
[0085] In some embodiments, the communication apparatus may further include a memory. The communication apparatus may be a network device, for example, a location server or a component (for example, a circuit, a chip, or a chip system) in a location server on a network side.
[0086] According to a tenth aspect, a computer program product is described. The computer program product storing instructions which, when executed, cause an apparatus to perform the method of any one of operations in the first, second, third or fourth aspects.
[0087] According to an eleventh aspect, a computer-readable storage medium is described. The computer-readable storage medium having instructions stored thereon which, when executed by one or more processors, cause the one or more processors to perform the method of any one of operations of the first, second, third or fourth aspects.
[0088] According to a twelfth aspect, a communication system is described. The communication system, wherein the communication system comprises a first communication apparatus configured to perform the method of any one of operations of the first or second aspect and a second communication apparatus configured to perform the method of any one of the operations in the third or fourth aspect.
[0089] This application encompasses various embodiments, including not only method embodiments, but also other embodiments such as apparatus embodiments and embodiments related to non-transitory computer readable storage media. Embodiments may incorporate, individually or in combinations, the features disclosed herein.BRIEF DESCRIPTION OF THE DRAWINGS
[0090] For a more complete understanding of the present implementations, and the advantages thereof, reference is now made, by way of example, to the following descriptions taken in conjunction with the accompanying drawings.
[0091] FIG. 1 is a schematic diagram of a communication system in which the present disclosure may occur.
[0092] FIG. 2 is another schematic diagram of a communication system in which the present disclosure may occur.
[0093] FIG. 3 is a block diagram illustrating units or modules in a device in which the present disclosure may occur.
[0094] FIG. 4 is a block diagram illustrating units or modules in a device in which the present disclosure may occur.
[0095] FIG. 5 is a block diagram illustrating units or modules in a device in which the present disclosure may occur.
[0096] FIG. 6 is a block diagram illustrating a Multiple Input Multiple Output (MIMO) system in accordance with aspects of the present disclosure.
[0097] FIG. 7 is a schematic diagram illustrating a base station and a user equipment performing channel estimation in accordance with aspects of the present disclosure.
[0098] FIG. 8 is a schematic diagram illustrating transmission in the user centric cell free (UC-CF) service according to a first aspect of the present disclosure.
[0099] FIG. 9 is a signal flow diagram illustrating signaling steps for reference signal configuration and reporting for different TRP ON-OFF hypotheses according to an aspect of the present disclosure.
[0100] FIG. 10 is a representation of an example measurement resource configuration where a channel measurement resource is associated with a plurality of interference measurement resources according to an aspect of the present disclosure.
[0101] FIG. 11 illustrates an of a channel measurement resource and interference measurement resource configuration for different TRPs according to an aspect of the present disclosure.
[0102] FIG. 12 is a representation of multiple channel measurement resources associated with one another according to an aspect of the present disclosure.
[0103] FIG. 13 is an example of a channel measurement resource and interference measurement resource configuration for different TRPs according to another aspect of the present disclosure.
[0104] FIG. 14 is a timing diagram of an example measurement window for reference signal (RS) configuration and channel state information (CSI) reporting for different TRP ON-OFF hypotheses according to yet another aspect of the present disclosure.
[0105] FIG. 15 is an example of RS configuration within a measurement window according to an aspect of the present disclosure.
[0106] FIG. 16 is a signal flow diagram illustrating signaling steps between a network device and a user equipment (UE) in a wireless communication system according to an aspect of the present disclosure.
[0107] FIG. 17 is a signal flow diagram illustrating signaling steps between a network device and a UE in a wireless communication system according to another aspect of the present disclosure.DETAILED DESCRIPTION
[0108] For illustrative purposes, specific example implementations will now be explained in greater detail below in conjunction with the figures.
[0109] The implementations and examples set forth herein represent information sufficient to practice the claimed subject matter and illustrate ways of practicing such subject matter. Upon reading the following description in light of the accompanying figures, those of skill in the art will understand the concepts of the claimed subject matter and will recognize applications of these concepts not particularly addressed herein. It should be understood that these concepts and applications fall within the scope of the disclosure and the accompanying claims.
[0110] Moreover, it will be appreciated that any module, component, or device disclosed herein that executes instructions may include or otherwise have access to a non-transitory computer / processor readable storage medium or media for storage of information, such as computer / processor readable instructions, data structures, program modules, and / or other data. A non-exhaustive list of examples of non-transitory computer / processor readable storage media includes magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, optical disks such as compact disc read-only memory (CD-ROM) , digital video discs or digital versatile discs (i.e. DVDs) , Blu-ray DiscTM, or other optical storage, volatile and non-volatile, removable and non-removable media implemented in any method or technology, random-access memory (RAM) , read-only memory (ROM) , electrically erasable programmable read-only memory (EEPROM) , flash memory or other memory technology. Any such non-transitory computer / processor storage media may be part of a device or accessible or connectable thereto. Computer / processor readable / executable instructions to implement an application or module described herein may be stored or otherwise held by such non-transitory computer / processor readable storage media.
[0111] FIGs. 1, 2, 3, 4, and 5 following below provide context for a network and devices that may be in the network and that may implement aspects of the present disclosure.
[0112] FIG. 1, is a schematic illustration of an example communication system according to an implementation of the present disclosure, there is shown a communication system 100 that includes a radio access network (RAN) 120, one or more communication electronic devices (EDs) 10a, 110b, 110c, 110d, 110e, 110f, 110g, 110h, 110i, 110j (collectively referred to as 110) , a core network 130, a Public Switched Telephone Network (PSTN) 140, the Internet 150, and other networks 160 . The RAN 120 may include, but is not limited to, a future generation RAN, or a legacy RAN such as, but not limited to, 5th generation (5G) , 4th generation (4G) , 3rd generation (3G) or 2nd generation (2G) radio access network. The RAN 120 may be, for example, an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN) , a NextGen RAN (NG RAN) , or some other type of RAN. Examples of RAN 120 based on the evolution of telecommunications standards include, but is not limited to, GSM (Global System for Mobile Communications) and CDMA (Code Division Multiple Access) for 2G, UMTS (Universal Mobile Telecommunications System) based on WCDMA (Wideband Code Division Multiple Access) and CDMA2000 for 3G, LTE (Long-Term Evolution) and WiMAX (Worldwide Interoperability for Microwave Access) for 4G, and NR (New Radio) for 5G. In some implementations, The RAN 120 may use any radio access technology (RAT) in the wireless interface between the one or more EDs 110 and the RAN 120. In some implementations, the term “radio access” may refer to the future generation air interface standards which may include both terrestrial networks (TNs) and non-terrestrial networks (NTNs) . These networks will be described in greater detail below in conjunction with various implementations. The one or more communication EDs 110 (also referred to as “user equipment” ) are configured to connect (e.g., communicatively couple) with each other or to one or more network nodes 170a, 170b (collectively referred to as 170) in the RAN 120. The core network (CN) 130 is a part of the communication system 100 and consists of network nodes (e.g., 170a, 170b) which provide support for the network features and telecommunication services. In some implementations, the CN 130 may be dependent on the RAT used in the communication system 100. In other implementations, the CN 130 may be access-agnostic, i.e., the CN 130 may be independent of the RAT used in the communication system 100. There are different types of CN 130, for different 3GPP system generations. For example, the CN 130 is the Evolved Packet Core (EPC) in 4G, also known as the Evolved Packet System (EPS) . In another example, the CN 130 is the 5G Core (5GC) which was developed as part of the 5G System (5GS) . The CN 130 also enables integration of different 3GPP and non-3GPP access types. In some implementations and referring to FIG. 1, the CN 130 also provides the interface towards external networks that may include the PSTN 140, the Internet 150, and other networks 160 in the communication system 100.
[0113] In general, the communication system 100 facilitates interaction between multiple wireless or wired elements. The communication system 100 may transmit different types of content, such as voice, data, video, and / or text, through different transmission methods such as, but not limited to, broadcast, multicast, groupcast, and unicast. Additionally, the communication system 100 operates by allocating and / or sharing resources, such as carrier spectrum bandwidth, among its constituent elements.
[0114] The communication system 100 may provide a wide range of communication services and applications including, but not limited to, Enhanced Mobile Broadband (eMBB) services, Ultra-Reliable Low-Latency Communication (URLLC) services, Massive Machine Type Communication (mMTC) services, Integrated Sensing And Communication (ISAC) , immersive communication, Ultra-massive Machine-Type Communication (uMTC) , hyper reliable and low-latency communication, ubiquitous connectivity, integrated AI and communication, and other services that can be provided by a future generation communication system. The communication system 100 may provide other services and applications such as, but not limited to, earth monitoring, remote sensing, passive sensing and positioning, navigation and tracking, autonomous delivery and mobility and the like.
[0115] The communication system 100 may include a terrestrial communication system (or network) and / or a non-terrestrial communication system (or network) . The communication system 100 may provide a high degree of availability and robustness through a joint operation of the terrestrial communication system and the non-terrestrial communication system. For example, integrating a non-terrestrial communication system (or components thereof) into a terrestrial communication system can result in a heterogeneous network comprising multiple layers. The heterogeneous network may achieve better overall performance through efficient multi-link joint operation, more flexible functionality sharing, and faster physical layer link switching between terrestrial networks and non-terrestrial networks. The terrestrial communication system and the non-terrestrial communication system could be considered as sub-systems of the communication system 100.
[0116] FIG. 2 illustrates another example communication system 100 according to an implementation of the present disclosure, there is shown the communication system 100 includes EDs 110a, 110b, 110c, 110d (collectively referred to as ED 110) , RANs 120a, 120b, one or more CNs 130, a PSTN 140, the Internet 150, and other networks 160. Additionally, the communication system 100 may also include a non-terrestrial network (NTN) 120c. The RANs 120a and120b may include network nodes 170a and 170b respectively. Examples of network nodes 107a, 107b include base stations, which can be generally referred to as terrestrial network (TN) devices or terrestrial transmit and receive points (T-TRPs) 170a and 170b (collectively referred to as 170) . In this context, the terms "TRP" and "base station" are used interchangeably unless otherwise specified. For simplicity, this disclosure primarily refers to network nodes as base stations; however, unless explicitly stated otherwise, references to TRP are considered non-limiting and interchangeable. The T-TRPs 170a, 170b may be base stations mounted on a building or tower. In one implementation, the NTN 120c includes a RAN node such as a base station 172, which may be generally referred to as an NTN device, a non-terrestrial node, a non-terrestrial network device, a non-terrestrial base station, or a non-terrestrial transmit and receive point (NT-TRP) 172.
[0117] In some implementations, the NT-TRP 172 is not attached to the ground, for example, as in the case of an airborne base station. An airborne base station may be implemented using communication equipment supported or carried by a flying device. For example, a flying device may include, but is not limited to, an airborne platform (such as a blimp or an airship) , balloon, drone (such as quadcopter) , and other types of aerial vehicles. In some implementations, an airborne base station may be supported or carried by an unmanned aerial system (UAS) or an unmanned aerial vehicle (UAV) , such as a drone. An airborne base station may be a moveable or mobile base station that can be flexibly deployed in different locations to meet network demand. A satellite base station is another example of a non-terrestrial base station. A satellite base station may be implemented using communication equipment supported or carried by a satellite. A satellite base station may also be referred to as an orbiting base station. High altitude platforms are yet another example of non-terrestrial base stations, including international mobile telecommunication base stations.
[0118] As referred to herein, and unless specified otherwise, a “TRP” may also refer to a T-TRP or an NT-TRP, a “T-TRP” may also refer to a “TN TRP” , and an “NT-TRP” may also refer to an “NTN TRP” . The NTN 120c may be considered a RAN, sharing operational aspects with RANs 120a, 120b. The NTN 120c may include at least one NTN device and at least one corresponding terrestrial network device. The at least one NTN device may function as a transport layer device and the at least one corresponding terrestrial network device may function as a RAN node, communicating with the ED 110 via the NTN device. Additionally, there may be an NTN gateway on the ground (referred to as a terrestrial network device) that also functions as a transport layer device facilitating communication with both the NTN device and the RAN node. The RAN node may communicate with the ED 110 via the NTN device and the NTN gateway. In some implementations, the NTN gateway and the RAN node may be located within the same device.
[0119] A base station 170 (also referred to as a TRP as stated above) is a network element within a radio access network responsible for radio transmission and reception in one or more cells to or from the ED (such as auser equipment) . In different implementations, the base station 170 may also be known as a base transceiver station (BTS) , a radio base station, a network node, a network device, a device on the network side, a transmit / receive node, a Node B, an evolved NodeB (eNodeB or eNB) , a Home eNodeB, a next Generation NodeB (gNB) , a transmission point (TP) , a site controller, an access point (AP) , a wireless router, a relay station, a terrestrial node, a terrestrial network device, a terrestrial base station, a non-terrestrial node, a non-terrestrial network device, a non-terrestrial base station, and a positioning node, among other possibilities. The base station 170 may be a macro base station (BS) , a pico BS, a relay node, a donor node, or combinations thereof. When the base station 170 performs (or is configured to perform) a method described herein, it may be interpreted as the base station itself, one or more modules (or units) in the base station, a circuit or chip, or a combination thereof, performing the method. For example, the circuit or chip may include a modem chip, also referred to as a baseband chip, a system on chip (SoC) including a modem core, system in package (SIP) ) , and the like, and may be responsible for one or more communication functions within the base station.
[0120] The EDs 110a-110d and TRPs 170a-170b, 172 are examples of communication equipment configured to implement some or all of the operations and / or implementations described herein. The T-TRP 170a forms part of the RAN 120a, which may include other TRPs, and / or other devices. Also, the TRP 170b forms part of the RAN 120b, which may include other TRPs, and / or devices. Each TRP 170a, 170b may transmit and / or receive wireless signals within a particular geographic region or area, sometimes referred to as a “cell” or a “coverage area” . The TRPs 170a-170b may be responsible for allocating and / or configuring resources and transmission and / or reception in a set of cell (s) . A cell is a radio network object that can be uniquely identified by a cell identification that is broadcasted over a geographical region or area from base stations associated with the cell. A cell can work in either FDD or TDD mode. A cell may be further divided into cell sectors, and a base station 170a-170b may, for example, employ one or more transceivers to provide services to one or more sectors. Some implementations, may include pico or femto cells if supported by the radio access technology. In some implementations, one or more transceivers could be used for each cell, such as with Multiple-Input Multiple-Output (MIMO) technology. The number of RANs 120a-120b shown is merely an example. Any number of RANs may be contemplated when designing the communication system 100.
[0121] A base station may be a single element, as shown in the figures, or multiple elements distributed throughout the corresponding RAN, or otherwise configured. In some implementations, a plurality of RAN nodes coordinate to assist the ED 110 in implementing radio access, and different RAN nodes separately implement and handle different functions of the base station. For example, the RAN node may be a central unit (CU) , a distributed unit (DU) , a CU-control plane (CP) , a CU-user plane (UP) , or a radio unit (RU) etc. The CU and the DU may be separately deployed, or included within the same element (i.e., a baseband unit (BBU) ) . The RU may be included in a radio frequency device or a radio frequency unit (i.e., a remote radio unit (RRU) , an active antenna unit (AAU) , or a remote radio head (RRH) ) . In different systems, the CU (or the CU-CP and the CU-UP) , the DU, or the RU may be known by different names, but their functions are understood by person skilled in the art. For example, in an open radio access network (ORAN) system, a CU may be referred to as an open CU (O-CU) , a DU may be referred to as an open DU (O-DU) , and a CU-CP may be referred to as an open CU-CP (O-CU-CP) . The CU-UP may also be referred to as an open CU-UP (O-CU-UP) , and the RU may also be referred to as an open RU (O-RU) . Any one of the CU (or the CU-CP, the CU-UP) , the DU, and the RU may be implemented using a software module, a hardware module, or a combination of a software module and a hardware module.
[0122] Furthermore, communication between different devices / apparatuses in various implementations of this disclosure may refer to direct communication (that is, without the need of forwarding by another device / apparatus) , or may refer to communication (s) between different devices / apparatuses via another device / apparatus (that is, requiring forwarding by another device / apparatus) . Alternatively, such communication (s) may involve one functional unit inside a device / apparatus using another functional unit within the device / apparatus to communicate with another device / apparatus. In other words, phrases such as "sending (or transmitting) information to... (an ED or a base station) " in this disclosure may be understood as a destination endpoint of the information being an ED or a base station, including, sending / transmitting information directly or indirectly to an ED or a base station. Similarly, phrases like "receiving information from... (an ED or a base station) " may be understood as a source endpoint of the information being an ED or a base station, including directly or indirectly receiving information from an ED or a base station. Between the source endpoint that sends the information and the destination endpoint, necessary processing such as, but not limited to, format conversion, digital-to-analog conversion, amplification, and filtering may be performed on the information. However, the destination endpoint may understand valid information from the source endpoint. A similar understanding applies to other descriptions in this disclosure without reiterating details already described. In the present disclosure, the terms "send" and "transmit" may be used interchangeably in different implementations of this disclosure.
[0123] The ED 110 is used to connect people, objects, machines, and other entities. The ED 110 may be widely used in various scenarios including, but not limited to, cellular communications, device-to-device (D2D) , vehicle to everything (V2X) , peer-to-peer (P2P) , machine-to-machine (M2M) , MTC, internet of things (IoT) , virtual reality (VR) , augmented reality (AR) , mixed reality (MR) , metaverse, digital twin, industrial control, self-driving, remote medical, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city, drones, robots, remote sensing, passive sensing, positioning, navigation and tracking, and autonomous delivery and mobility.
[0124] Each ED 110 represents any suitable end user device for wireless operation and may include such devices (or may be referred to as, but not limited to) a user equipment (UE) or a user device or a terminal device, a wireless transmit / receive unit (WTRU) , a mobile station, a fixed or mobile subscriber unit, a cellular telephone, a station (STA) , an MTC device, a personal digital assistant (PDA) , a smartphone, a laptop, a computer, a tablet, a wireless sensor, a consumer electronics device, a smart book, a vehicle, a car, a truck, a bus, a train, or an IoT device, wearable devices (such as a watch, a pair of glasses, head mounted equipment, etc. ) , an industrial device, or an apparatus (such as a module, modem, or chip) in the forgoing devices, among other possibilities. Future generation EDs 110 may be referred to by other terms. When an ED 110 performs (or is configured to perform) a method described herein, it may be interpreted as the ED itself, one or more modules (or units) in the ED, a circuit or chip, or a combination thereof, performing the method. For example, the circuit or chip may include a modem chip, also referred to as a baseband chip, a system on chip (SoC) including a modem core, or system in package (SIP) ) , and the like, and may be responsible for one or more communication functions in the ED.
[0125] Each ED 110 connected to TRPs 170a-170b, and / or TRPs 172 can be dynamically or semi-statically turned-on (i.e., established, activated, or enabled) , turned-off (i.e., released, deactivated, or disabled) and / or configured in response to one of more of: connection availability and connection necessity.
[0126] Any ED 110 may be alternatively or additionally configured to interface, access, or communicate with any of the TRPs 170a, 170b and 172, the Internet 150, the CN 130, the PSTN 140, the other networks 160, or any combination thereof. In some examples, the ED 110a may communicate an uplink (UL) and / or downlink (DL) transmission over a terrestrial air interface 190a with station-TRP 170a. In some examples, the EDs 110a, 110b, 110c, and 110d may also communicate directly with one another via one or more sidelink (SL) air interfaces 190b. In some examples, the EDs 110a, 110d may communicate using an UL and / or DL transmission over a non-terrestrial air interface 190c with NT-TRP 172.
[0127] An air interface (such as, for example, 190a, 190b, 190c) generally includes a number of components and associated parameters that collectively specify how a transmission is to be sent and / or received over a wireless communications link between two or more communicating devices such as EDs and base station (s) . For example, an air interface may include one or more components defining the waveform (s) , frame structure (s) , multiple access scheme (s) , protocol (s) , coding scheme (s) and / or modulation scheme (s) for conveying information (such as, data) over a wireless communications link. The air interfaces 190a and 190b may use similar communication technology, that may include any suitable radio access technology.
[0128] The non-terrestrial air interface 190c can enable communication between the EDs 110a, 110d and one or more NT-TRPs 172 via a wireless link or simply a link. For some examples, the link is a dedicated connection for unicast transmission, a connection for broadcast transmission, or a connection between a group of EDs 110 and one or more NT-TRPs 172 for multicast transmission.
[0129] The TRPs 170a-170b, 172 may communicate with one another over one or more air interfaces 190e, 190f using wireless communication links (such as radio frequency (RF) , microwave, infrared (IR) , etc. ) or wired communication links. The air interfaces 190e, 190f may utilize any suitable radio access technology, and may be substantially similar to the air interfaces 190a, 190c over which the EDs 110a-110d communicate with one or more of the TRP 170a-170b, 172 or they may be substantially different. For example, the communication system 100 may implement one or more channel access methods, such as Time Division Multiple Access (TDMA) , Frequency Division Multiple Access (FDMA) , Code Division Multiple Access (CDMA) , Single Carrier Frequency Division Multiple Access (SC-FDMA) , Low Density Signature Multicarrier Code Division Multiple Access (LDS-MC-CDMA) , Non-Orthogonal Multiple Access (NOMA) , Pattern Division Multiple Access (PDMA) , Lattice Partition Multiple Access (LPMA) , Resource Spread Multiple Access (RSMA) , and Sparse Code Multiple Access (SCMA) .
[0130] The RANs 120a and 120b are in communication with the CN 130 to provide the EDs 110a 110b, and 110c with various services such as voice, data, multimedia, and other services. The RANs 120a and 120b and / or the CN 130 may be in direct or indirect communication with one or more other RANs (not shown) , which may or may not be directly served by the CN 130, and may employ different radio access technologies from RAN 120a and / or RAN 120b. The CN 130 may also serve as a gateway access between (i) the RANs 120a and 120b and / or the EDs 110a 110b, and 110c, and (ii) other networks (such as the PSTN 140, the Internet 150, and the other networks 160) . In addition, some or all of the EDs 110a 110b, and 110c may include functionality for communicating with different wireless networks over different wireless links using different wireless technologies and / or protocols. For example, the EDs 110a 110b, and 110c communicate using different cellular communications protocols, such as, but not limited to, a Global System for Mobile Communications (GSM) protocol, a code-division multiple access (CDMA) network protocol, a Push-to-Talk (PTT) protocol, a PTT over Cellular (POC) protocol, a Universal Mobile Telecommunications System (UMTS) protocol, a 3GPP Long Term Evolution (LTE) protocol, a fifth generation (5G) protocol, a New Radio (NR) protocol, and the like. Instead of wireless communication (or in addition thereto) , the EDs 110a 110b, and 110c may communicate using wired communication channels to a service provider or switch (not shown) , and / or to the Internet 150. The PSTN 140 may include circuit switched telephone networks for providing plain old telephone service (POTS) . The Internet 150 may include a network of computers and subnets (intranets) or both, and incorporate protocols, such as internet protocol (IP) , transmission control protocol (TCP) , user datagram protocol (UDP) . EDs 110a 110b, and 110c may be multimode devices capable of operation according to multiple radio access technologies, and may incorporate one or multiple transceivers necessary to support such.
[0131] In addition, the communication system 100 may comprise a sensing agent (not shown) to manage the sensed data from ED 110 and / or any one of TRPs 170a, 170b, 172. In one implementation, the sensing agent may be part of any one of TRPs 170a, 170b, 172. In another implementation, the sensing agent is a separate node that can communicate with the CN 130 and / or the RAN 120 (such as any one of TRPs 170a, 170b, 172) .
[0132] FIG. 3 is a schematic illustration showing an apparatus 310 wirelessly communicating with another apparatus 320 within a communication system (e.g., the communication system 100) according to an implementation of the present disclosure. The apparatus 310 may be an electronic device (such as ED 110) . The apparatus 320 may be a network node (e, g., the network node 170) such as T-TRP 170 or an NT-TRP 172. Although only one apparatus 310, and one apparatus 320 are shown in the figure, the number of apparatus 310 and / or number of apparatus 320 can vary, potentially including one or more of each. For example, a single ED 110 may be served by a single T-TRP 170 (or a single NT-TRP 172) , or by multiple T-TRPs 170 (or multiple NT-TRPs 172) . Similarly, a single ED 110 may be served by one or more T-TRPs 170 and one or more NT-TRPs 172. Similarly, a single T-TRP 170 (or a single NT-TRP 172) may serve one or more EDs 110.
[0133] The apparatus 310 may include one or more processors 210. For clarity and to avoid overcrowding the illustration, only a single processor 210 is illustrated. The apparatus 310 may further include a transmitter 201 and a receiver 203 coupled to one or more antennas 204. For clarity, only a single antenna 204 is illustrated. One, some, or all of the antennas 204 may alternatively be panels. In some implementations, the transmitter 201 and the receiver 203 are separate from each other. In other implementations, the transmitter 201 and the receiver 203 may be integrated into a single unit, for example, as a transceiver. The transceiver is configured to modulate data or other content for transmission by the one or more antennas 204 or a network interface controller (NIC) . The transceiver may also be configured to demodulate data or other content received by the one or more antennas 204. A transceiver may include any suitable structure for generating signals for wireless or wired transmission and / or for processing signals received through wireless or wired communication. Each antenna 204 includes any suitable structure for transmitting and / or receiving wireless or wired signals. The apparatus 310 may include a memory 208. In some implementations, the apparatus 310 may include multiple memories 208. Only a single transmitter 201, receiver 203, processor 210, memory 208, and antenna 204 is illustrated for simplicity, but the apparatus 310 may include one or more other components. In some implementations of the present disclosure, the transceiver (or transmitter 201 and / or receiver 203) may be viewed as an interface circuit.
[0134] The memory 208 is configured to store instructions used to perform operations described herein. The memory 208 may also be configured to store data that is used, generated, or collected by the apparatus 310. For example, the memory 208 can store software instructions or modules configured to implement some or all of the functionalities and / or operations described herein and that which are executed by the one or more processors 210.
[0135] The apparatus 310 may further include one or more input / output devices (not shown) or interfaces. The input / output devices or interfaces facilitate interaction with a user or other devices in the network. Each input / output device or interface includes suitable components for facilitating transmission of information to a user and reception of information from a user, and for various network interface communications. Such components may include, but are not limited to, a speaker, microphone, keypad, keyboard, display, touch screen, and the like.
[0136] The processor 210 may be configured to perform (or control the apparatus 310 to perform) operations (or methods) described herein as being performed by the apparatus 310. For example, the processor 210 performs or controls the apparatus 310 to perform the operations of: a) receiving one or more transport blocks (TBs) , b) using a resource for decoding at least one of the received TBs, c) releasing the resource for decoding another of the received TBs, and / or d) receiving configuration information configuring a resource. Specifically, the operations may include tasks related to: preparing a transmission for UL transmission to the apparatus 320, processing DL transmissions received from the apparatus 320, and handling SL transmission to and from another apparatus 310. Processing operations related to preparing a transmission for UL transmission may include operations such as, but not limited to, encoding, modulating, transmit beamforming, and generating symbols for transmission. Processing operations related to processing DL transmissions may include operations such as, but not limited to, receive beamforming, demodulating and decoding received symbols. Processing operations related to processing SL transmissions may include operations such as, but not limited to, transmit / receive beamforming, modulating / demodulating and encoding / decoding symbols. Depending upon the implementation, a DL transmission may be received by the receiver 203, possibly using receive beamforming, and the processor 210 may extract signaling from the DL transmission (such as by detecting and / or decoding the signaling) . An example of signaling may be a reference signal transmitted by the apparatus 320. In some implementations, the processor 210 implements the transmit beamforming and / or the receive beamforming based on the indication of beam direction, such as beam angle information (BAI) , received from the apparatus 320. In some implementations, the processor 210 may be configured to perform operations relating to network access (such as initial access) and / or downlink synchronization, which includes operations for detecting a synchronization sequence, decoding and obtaining the system information, and the like. In some implementations, the processor 210 may perform channel estimation, such as using a reference signal received from the apparatus 320.
[0137] Although not illustrated, in some implementations, the processor 210 may either be a part of the transmitter 201 or a part of the receiver 203 or a part of both the transmitter 201 and the receiver 203. Although not illustrated, in some implementations, the memory 208 may be a part of the processor 210.
[0138] The processor 210, along with the processing components of the transmitter 201 and the receiver 203 may each be implemented by one or more processors that may the same or different. These processors are configured to execute instructions stored in a memory (such as in the memory 208) .
[0139] The apparatus 320 includes one or more processors 260 (only one processor 260 is illustrated) . The apparatus 320 may further include one or more transmitters 252 and one or more receivers 254 coupled to one or more antennas 256. Only a single antenna 256 is illustrated to avoid clutter in the illustration. One, some, or all of the antennas 256 may alternatively be panels. In some implementations, the transmitter 252 and the receiver 254 are separate from each other. In other implementations, the transmitter 252 and the receiver 254 may be integrated into a single unit such as, for example, as a transceiver. The apparatus 320 may further include a memory 258. In some implementations, the apparatus 320 may include multiple memories 258. The apparatus 320 may further include a scheduler 253. Only a single transmitter 252, receiver 254, processor 260, memory 258, antenna 256 and scheduler 253 are illustrated for simplicity, however the apparatus 320 may include one or more other components. In the present disclosure, in some implementations, the transceiver (or transmitter 252 and / or receiver254) may be viewed as an interface circuit.
[0140] In some implementations, various components of the apparatus 320 may be distributed. For example, some of the modules of the apparatus 320 may be located remotely from the equipment housing the antennas 256 for the apparatus 320 (and therefore also can be viewed as one or more nodes) . These modules, which can be considered as one or more nodes, may be coupled to the equipment that houses the antennas 256 over a communication link (not shown) , sometimes referred to as front haul, such as the Common Public Radio Interface (CPRI) . Therefore, in some implementations, the term apparatus 320 may also refer to network-side nodes that perform processing operations such as, but not limited to, determining the location of the apparatus 310, resource allocation (scheduling) , message generation, and encoding / decoding, and that which are not necessarily part of the equipment that houses the antennas 256 of the apparatus 320. The nodes may also be coupled to other apparatuses 320. In some implementations, the apparatus 320 may actually be a plurality of nodes that are operating together to serve the apparatus 310, such as through the use of coordinated multipoint transmissions, or through the use of ORAN system as described above in the disclosure.
[0141] The processor 260 is configured to perform operations including those related to: preparing a transmission for DL transmission to the apparatus 310, processing an UL transmission received from the apparatus 310, preparing a transmission for backhaul transmission to another apparatus 320, and processing a transmission received over backhaul from another apparatus 320. Processing operations related to preparing a transmission for DL or backhaul transmission may include operations such as, but not limited to, encoding, modulating, precoding (such as MIMO precoding) , transmit beamforming, and generating symbols for transmission. Processing operations related to processing received transmissions in the UL or over backhaul may include operations such as, but not limited to, receive beamforming, demodulating received symbols, and decoding received symbols. The processor 260 may also be configured to perform operations relating to network access (such as initial access) and / or DL synchronization, such as generating the content of synchronization signal blocks (SSBs) , generating the system information, and the like. In some implementations, the processor 260 is further configured to generate an indication of beam direction, such as BAI, which may be scheduled for transmission by the scheduler 253 which will be described below. In some implementations, the processor 260 implements the transmit beamforming and / or receive beamforming based on beam direction information (such as BAI) received from another apparatus 320. The processor 260 is configured to perform other network side processing operations described herein, such as, but not limited to, determining the location of the apparatus 310, determining where to deploy another apparatus 320, and the like. In some implementations, the processor 260 may generate signaling data, to configure one or more parameters of the apparatus 310 and / or one or more parameters of another apparatus 320. Any signaling data generated by the processor 260 is sent by the transmitter 252. In some implementations, the apparatus 320 implements physical layer processing. In some implementations, the apparatus 320 may perform higher layer functions such as those at the Medium Access Control (MAC) or Radio Link Control (RLC) layers in addition to physical layer processing. In the apparatus 320, the scheduler 253 may be coupled to the processor 260 or integrated within the processor 260. In some implementations, the scheduler 253 may be integrated within the apparatus 320 or may be operated separately from the apparatus 320. The scheduler 253 may schedule UL, DL, SL, and / or backhaul transmissions, including issuing scheduling grants and / or configuring scheduling-free (such as “configured grant” ) resources.
[0142] The apparatus 320 may further include a memory 258 that is configured to store instructions for performing the operations described herein. The memory 258 may also store data that is used, generated, or collected by the apparatus 320. For example, the memory 258 can store software instructions or modules configured to implement some or all of the functionalities and / or implementations described herein and that which are executed by the processor 260.
[0143] Although not illustrated, the processor 260 may be implemented as part of the transmitter 252 and / or a part of the receiver 254. Although not illustrated, in some implementations, the processor 260 may implement the scheduler 253 and the memory 258 may be implemented as part of the processor 260.
[0144] The processor 260, the scheduler 253, the processing components of the transmitter 252, and the processing components of the receiver 254 may each be implemented by the same or different processors that are configured to execute instructions stored in a memory, such as in the memory 258.
[0145] The apparatus 320 and / or the apparatus 310 may include other components, not shown or described herein for the sake of clarity.
[0146] Note that the term “signaling” , as used herein, may alternatively be referred to as control signaling, control message, control information, or message for simplicity. Signaling between a base station (such as the TRP 170a. 170b, 172) and a UE or sensing device (such as ED 110) , or signaling between a different UE or sensing device (such as between ED 110a and ED 110b) may be carried in physical layer signaling (also called as dynamic signaling) , which is transmitted in a physical layer control channel. For DL, the physical layer signaling may be known as downlink control information (DCI) which is transmitted in a physical downlink control channel (PDCCH) . For UL, the physical layer signaling may be known as uplink control information (UCI) which is transmitted in a physical uplink control channel (PUCCH) . For SL, signaling between different UEs or sensing devices (such as between ED 110a and ED 110b) may be known as SL control information (SCI) which is transmitted in a physical sidelink control channel (PSCCH) . Signaling may be carried in a higher layer (such as higher than physical layer) signaling, which is transmitted in a physical layer data channel, such as in a physical downlink shared channel (PDSCH) for downlink signaling, in a physical uplink shared channel (PUSCH) for uplink signaling, and in a physical sidelink shared channel (PSSCH) for SL signaling. Higher layer signaling may also be called static signaling, or semi-static signaling. The higher layer signaling may include radio resource control (RRC) protocol signaling or media access control -control element (MAC-CE) signaling. Signaling may be included in a combination of physical layer signaling and higher layer signaling.
[0147] It should be noted that in the present disclosure, “information” , when different from “message” , may be carried within a single message, or may be carried in multiple separate messages.
[0148] FIG. 4 illustrates an example apparatus 410 according to an implementation of the present disclosure. The apparatus 410 may be a communication device or an apparatus implemented in a communication device such as the ED 110 or the TRPs 170a, 170b, 172. For example, the apparatus 410 implemented in an ED may be an integrated circuit, which in some instances may be referred to as a chip, a modem, a modem chip, a baseband chip, or a baseband processor. In some implementations, one or more integrated circuits can be packaged into a system-on-chip, a system-in-package, or a multi-chip module. The apparatus 410 can include one or more integrated circuits and other discrete components. In some implementations, the apparatus 410 may be a module within the ED 110, or within the apparatus 310. In some implementations, the apparatus 410 may be a module within one of the TRPs 170a, 170b, 172, or the apparatus 320.
[0149] In an example, the apparatus 410 may include one or more processors 411, and an interface circuit 412. The apparatus 410 may further include a memory 413. The one or more processors 411 are configured to process signals and execute one or more communication protocols. The memory 413 is configured to store at least a part of corresponding computer program instructions and / or data. In an example, the one or more processors 411 execute the computer program instructions stored in the memory 413 to implement related operations (for example, inputting, outputting, receiving, and transmitting) in the method embodiments disclosed herein. In some implementations, the memory 413 being configured to store the corresponding computer program instructions and / or data may mean that the memory 413 is configured to store all of the corresponding computer program instructions and / or data for execution by the one or more processors 411. In some implementations, the memory 413 being configured to store the corresponding computer program instructions and / or data may mean that the memory 413 is configured to store a part of the corresponding computer program instructions and / or data. For example, the part of the corresponding computer program instructions and / or data may include computer program instructions and / or data that need to be currently executed by the one or more processors 411. Thus, the memory 413 may store different parts of computer program instructions and / or data for a plurality of times for the one or more processors 411 to perform related operations in the method embodiments disclosed herein. As a communication interface, the interface circuit 412 is configured to implement communication with another component. For example, the interface circuit 412 may communicate a signal with another apparatus or system such as a radio frequency processing apparatus, or another processor. The signal may include or carry information intended as a payload, such as user data, control information, etc. The signal may also include or carry information useful to a receiver, but not necessarily as a payload, such as a pilot signal or reference signal. Communicating the signal may include transmitting the signal to another component or device. Communicating the signal may additionally or alternatively include receiving the signal from another component or device. Transmitting the signal may include outputting the signal to a component or device that is directly or indirectly coupled to the interface circuit 412. Receiving the signal may include inputting or obtaining the signal from a component or device that is directly or indirectly coupled to the interface circuit 412. Optionally, to reduce a load of the one or more processors, a baseband signal processing circuit 414 may be also disposed to implement processing of at least a part of baseband signals, including signal demodulation, modulation, encoding, decoding, or the like.
[0150] The apparatus 410 may be the processor 210 (or 260) within the apparatus 310 (or 320) , in some scenarios, or may be included within the processor 210 (or 260) within the apparatus 310 (or 320) in some scenarios. The apparatus 410 may be a baseband chip or may include a baseband chip. In some implementations, the apparatus 410 may be independently packaged into a chip. In some implementations, the apparatus 310 (or 320) includes different types of chips. The apparatus 410 may be packaged into a processor chip (for example, an SoC chip or an SIP chip) with the different types of chips. In some implementations, the apparatus 410 may be packaged into a chip with some or all of circuits of a radio frequency processing system that may further be included in the apparatus 310 (or 320) .
[0151] FIG. 5 illustrates example apparatus 510 according to an implementation of the present disclosure. The apparatus 510 may include corresponding modules or units configured to implement methods and / or implementations described herein. In some implementations, the apparatus 510 includes a processing unit 512 and a communication unit 513. Optionally, the apparatus 510 may further include a storage unit 511 configured to store apparatus program code (or instructions) and / or data.
[0152] The apparatus 510 may be an ED side apparatus, for example, an ED or a module in an ED, or a circuit or a chip responsible for a communication function in an ED. In some implementations, apparatus 510 may be the apparatus 310. The processing unit 512 may be the processor 210. The communication unit 513 may comprise a receiving unit and / or a transmitting unit. The receiving unit and / or the transmitting unit may be the transmitter 201 and / or the receiver 203 respectively. The storage unit 511 may be the memory 208.
[0153] The apparatus 510 may be a base station side apparatus, for example, a base station or a module in a base station, or a circuit or a chip responsible for a communication function in a base station. In some implementations, apparatus 510 may be apparatus 320. The processing unit 512 may be the processor 260 (the scheduler 253 may also be included) . The communication unit 513 may comprise a receiving unit and / or a transmitting unit. The receiving unit and / or the transmitting unit may be the transmitter 252 and / or the receiver 254 respectively. The storage unit 511 may be the memory 258.
[0154] In some implementations, when the apparatus 510 is an ED 110 or a module in an ED 110, a function of the apparatus 510 may be implemented by one or more processors. Specifically, the processor may include a modem chip, or a system on chip (SoC) chip or an SIP chip that includes a modem core. A function of the communication unit 513 may be implemented by a transceiver circuit.
[0155] In some implementations, when the apparatus 510 is a circuit or a chip that is responsible for a communication function in an ED 110, -such as a modem chip, a system on chip (SoC) chip or an SIP chip that includes a modem core -a function of the processing unit 512 may be implemented by a circuit system within the chip which includes one or more processors. A function of the communication unit 513 may be implemented by an interface circuit or a data transceiver circuit on the chip.
[0156] It may be understood that the units in the apparatus 510 may be logical or functional. Each function may correspond to one functional unit, or two or more functions may be integrated into a single functional unit. In actual implementation, all or some of the units may be integrated into a single physical entity, or may be distributed across different physical entities. In addition, the functional units may be implemented in the form of hardware, software, or a combination of hardware and software. Whether a function is implemented in the form of hardware or software depends on particular applications and design constraint conditions of the technical solutions. A person skilled in the art may use different methods to implement the described functions for specific applications, but it should not be considered that the implementation goes beyond the scope of this disclosure.
[0157] In an example, a functional unit in any one of the apparatuses may be configured as one or more integrated circuits for implementing the methods disclosed herein, for example, as one or more application-specific integrated circuits (application-specific integrated circuits, ASICs) , one or more central processing units (CPUs) , one or more microprocessors or microprocessor units (MPUs) , one or more microcontrollers or microcontroller units (MCUs) , one or more digital signal processors (DSPs) , one or more field programmable gate arrays (FPGAs) , or a combination of these.
[0158] In an example, the storage unit 511 may include a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, and / or a register.
[0159] A processor may be referred to as a processor system, an application processor, a baseband processor, or a processor circuit. The processor may include one or a combination of one or more central processing units (CPUs) , one or more digital signal processors (DSPs) , one or more microprocessors (microprocessor units, MPUs) , one or more microcontrollers (microcontroller units, MCUs) , one or more graphics processing units (GPUs) , one or more field programmable gate arrays (FPGAs) , one or more artificial intelligence processors (AI processors) , or one or more neural network processing units (NPUs) .
[0160] Memory or a storage unit may include one or more of the following storage media: a random access memory (RAM) , a static random access memory (static RAM, SRAM) , a dynamic random access memory (dynamic RAM, DRAM) , a phase-change memory (PCM) , a resistive random access memory (resistive RAM, ReRAM) , a magnetoresistive random access memory (magnetoresistive RAM, MRAM) , a ferroelectric random access memory (ferroelectric RAM, FRAM) , a cache, a register, a read-only memory (ROM) , a flash memory (flash memory) , an erasable programmable read-only memory (erasable programmable ROM, EPROM) , a hard disk, and the like. In an example, computer program instructions used to execute embodiments may be stored in a non-volatile memory, for example, at least a part of a memory or storage unit (for example, one or more of a ROM, a flash memory, an EPROM, or a hard disk) . When a terminal runs, a part or all of corresponding computer program instructions may be loaded to a memory that has a higher transmission speed with the processor, for example, at least a part of a memory or a storage unit (for example, one or more of a RAM, an SRAM, a DRAM, a PCM, a RERAM, an MRAM, a FRAM, a cache, or a register) , so that the processor executes the computer program instructions to perform the steps in the method embodiments disclosed herein.
[0161] Multiple input multiple-output technology (sometimes simply referred to as “MIMO” ) allows an antenna array having multiple antennas to perform enhanced signal transmissions and receptions, which can result in higher data transmission rates. The above ED 110 and T-TRP 170, and / or NT-TRP may use MIMO to communicate over physical layer wireless resources. MIMO utilizes multiple antennas at a transmit apparatus and / or receive apparatus to transmit and / or receive data in a same physical layer resource block over multiple parallel wireless signals. MIMO may involve beamforming parallel wireless signals for reliable multipath transmission of data in the resource block. MIMO may involve bonding parallel wireless signals that transport different data, effectively increasing the data rate of the data carried in a resource block.
[0162] In recent years, a MIMO wireless communication system with the above T-TRP 170 and / or NT-TRP 172 configured with a large number of antennas (known as a large-scale MIMO or massive MIMO, for example) has gained wide attention from academia and industry. In the large-scale MIMO system, the T-TRP 170 and / or NT-TRP 172 are generally configured with more than ten antennas (such as, but not limited to 128 or 256 antennas) , and serve dozens of the ED 110 (such as, but not limited to 40 devices) . By having a large number of antennas, the T-TRP 170 and / or NT-TRP 172 can increase the degree of spatial freedom of wireless communications, improve data transmission rate, spectrum efficiency and power efficiency, and minimize or largely eliminate the interference between cells. Using the degree of spatial freedom provided by the large number of antennas, the T-TRP 170 and / or NT-TRP 172 of each cell can communicate with many ED 110 in the cell on a same frequency resource at a same time (that is, on a same time-frequency resource) , thus greatly increasing the spectrum efficiency of the system. By having a large number of antennas, the T-TRP 170 and / or NT-TRP 172 also enable each user to have better spatial directivity for uplink and downlink transmission. This can further result in a reduction of transmission power at one or more of the T-TRP 170, the NT-TRP 172, and the ED 110, thus improving overall power efficiency in the system.
[0163] MIMO technology may include single-user MIMO (SU-MIMO) , where signals on multiple spatial layers are transmitted to a same ED, and multiple-user MIMO (MU-MIMO) , where multiple spatial layers are transmitted to multiple EDs.
[0164] A MIMO system may include a receive apparatus (ED 110 for a downlink transmission, or T-TRP 170 or NT-TRP 172 for an uplink transmission, for example) connected to one or more receive (RX) antennas, a transmit apparatus (T-TRP 170 or NT-TRP 172 for a downlink transmission, or ED 110 for an uplink transmission, for example) connected to one or more transmit (TX) antennas. For instance, a plurality of RX antennas may form an antenna array in which the plurality of RX antennas are arranged in line at even intervals, which may be known as a uniform linear array (ULA) .
[0165] FIG. 6 is an example of a channel model of a MIMO system. A transmit apparatus transmitter 610 is connected to four TX antennas, x1 to x4, a receive apparatus receiver 620 is connected to four RX antennas, y1 to y4, and a transmission channel may be formed between each TX antenna and each RX antenna pair. For example, a signal transmitted through x1 may be received by y2 through channel h21. A signal transmitted through x3 may be received by y1 through channel h13.
[0166] An antenna port, which may also be referred to as a port for short, is a transmit antenna identified by a receiving apparatus, or a transmit antenna that can be distinguished in a spatial domain. For each virtual antenna, one antenna port may be configured, and each virtual antenna may be a weighted combination of multiple physical antennas. Each antenna port may correspond to one reference signal port.
[0167] In a MIMO system, to implement functions such as system synchronization, channel information feedback, and data transmission, channel estimation is performed on an uplink channel or a downlink channel. Channel estimation refers to the process of reconstructing or restoring received signals to compensate for signal distortion caused by channel fading and noise. In channel estimation, a reference signal sent by a transmitting apparatus may be used to track a change in the time domain and / or frequency domain of a channel, so as to reconstruct or restore a received signal. The reference signal may also be referred to as a pilot signal, a reference sequence or the like, and is described as a reference signal in the following for ease of understanding. The reference signal comprises, for example, a channel state information-reference signal (CSI-RS) , a sounding reference signal (SRS) , and a demodulation reference signal (DMRS) .
[0168] The CSI-RS is mainly used for downlink channel estimation corresponding to a physical antenna port. For example, a receiving apparatus (i.e. a UE in downlink) may perform channel estimation on each physical antenna port based on a CSI-RS sent by a transmitting apparatus (i.e. a base station in downlink) , to feedback channel state information (CSI) based on a channel estimation result. The CSI may include related information such as a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a layer indicator (LI) , and a rank indicator (RI) . The CSI is used to reconstruct or precode the downlink channel. Referring to FIG. 7, in some implementations, a process in which a base station 710 obtains CSI may include: sending, by the base station 710, a reference signal to a UE 720; obtaining, by the UE 720, an estimated CSI value according to the received reference signal, selecting, by the UE 720, a precoding vector from a codebook according to the estimated CSI value, and feedback, by the UE 720, the index of the precoding vector to the base station 710. The base station 710 determines a CSI reconstruction value with reference to the index of the precoding vector. The CSI reconstruction value can be a CSI closest to the true value of the CSI that can be obtained by the base station 710.
[0169] In a conventional wireless system, a UE gets access to the network by searching for a downlink (DL) synchronization channel first. After the UE is synchronized on downlink, the UE could get essential system information from a master information block (MIB) and system information block (SIB) . The UE could also get synchronized with the network on uplink by going through the RACH procedure. After synchronization on both links are completed, it could set up connection with the network at different levels and start to communicate with the network.
[0170] To enhance both capacity and coverage, one effective solution is to utilize more frequency resources. In 4G LTE more frequency resources are introduced / utilized in the form of carrier aggregation (CA) in the same or neighbor frequency band (s) . In 5G New Radio (NR) , more frequency resources in different frequency range (FR) are also exploited including FR1 (sub-6G Hz) and FR2 (24.25 GHz to 71.0 GHz) . In future wireless system, this trend could continue. With more frequency resources are available to be exploited and utilized, how to manage them may become a critical and practical issue. The conventional CA may not go beyond different frequency bands and large numbers of frequency bands in different FRs would also need a more unified way to be managed.
[0171] In 5G NR and earlier wireless system, an area covered by a base station is denoted as a cell and has a cell ID associated with it, and if multiple carriers are also supported in this case, each carrier could be denoted as a separate cell as well and have separate cell ID associated with each of the carrier (as each carrier is separate in frequency domain) . Some conventional cellular systems may provide a solution for wireless communication such that frequency reuse, interference mitigation can be utilized. However, there are some drawbacks that need to be overcome. One of them is handover (HO) , namely, when the UE moves from a first cell to a second cell, an HO procedure is used to hand over the UE from the first cell to the second cell, which may take longer time and incur more latency. In 5G NR system, the UE centric no cell (UCNC) concept is considered, but the benefits are not clear. In the end, some of the mechanisms on UCNC were specified, but there still exists ambiguity and a gap for a complete solution. For example, in Rel-18 low-layer trigger mobility (LTM) is introduced for node switching at a lower layer which will reduce the HO latency. However, an overall cell concept is still used.
[0172] In a future wireless system, the system could be more hybrid and comprise different types of transmit point (TP) nodes including both base station and TP (either a remote antenna head or a simple transmit / receive point) . Also, the function of each TP could be different, some for coverage enhancement and some for capacity enhancement, the coverage of each TP could be overlapped as well. More component carriers (CC) could also be used to expand the frequency bandwidth. From an energy saving perspective, certain TP could be turned on / off and such behaviors could be quite dynamic to save both network energy and UE energy without sacrificing performance. However, having one or more TRPs turning on / off may affect (e.g. by changing the interference) the communication channel between a UE and a TRP in the network which may impact the link adaptation process by the network. More latency sensitive application also requires more smooth and continuous service even when the UE moves around in the system, which makes the conventional HO difficult to handle.
[0173] FIG. 8 shows an example of the core idea of user centric-cell free (UC-CF) .
[0174] As disclosed herein, UC-CF may be interchangeable with UCCF, which refers to user-centric cell-free.
[0175] The most important features of the UC-CF (as compared to UCNC in 5G) system include the following: 1. Power on / off for some of TPs, so the network can perform power saving. 2. More cooperation of TPs, more or better choice for the UE and enabling Power on / off 3. Use of Coverage TP (e.g., a TP for a coverage service) or Carrier &capacity TP (e.g., a TP for a coverage and capacity service) or Carrier TP (e.g., a TP for a capacity service) to: enable the UE camped on a certain service BS, and enable Power on / off 4. Decouple control link and data link 5. Decoupled DL and UL
[0176] In some implementations, a network device for a capacity service, e.g., coverage TP, may have higher capacity and therefore can provide for example high throughput performance for certain services. A network device for a coverage service may have larger coverage and therefore can provide coverage for a large number of UEs. A network device for coverage and capacity services are those with higher capacity and larger coverage, and therefore can provide for example high throughput performance for certain services and also provide coverage for a large number of UEs.
[0177] FIG. 8 presents transmission in the UCCF service. In particular, FIG. 8 shows communication between entities in a UCCF system 800, which provides UCCF service.
[0178] As shown in the FIG. 8, there are 7 TPs (TP#0-TP#6) and 4UEs (UE#to UE#4) as examples. The 7 TP (the 7 TPs may include TPs and BSs) , denoted by 802, 804, 806, 808, 810, 812, 814, may have different forms, which may include two Macro base station (BS) , such as denoted by 802, 814, while the others are small stations. UEs can use the TP ID to differentiate them, or use a higher layer configured ID to differentiate the TPs. The Macro BS should have a good coverage, so the UL link or DL control link can be sent through the Macro (Main servicing TP) BS, as shown in FIG. 8 of links that are linked to TP#0 and TP#6 to ensure a robust link. The other TPs maybe the small stations, for the other links, like PDSCH, the UEs can receive signals from the small stations. In addition, the link between DL and UL should also be transmitted to different TPs or different Macro BSs or different small stations. As shown in FIG. 8, one UE (UE#2 denoted by 820) can receive and transmit the DL / UL PDSCH / PUSCH through the small station (TP#2 denoted by 806) near it. And UE#2 denoted by 820 could also transmit the uplink signals to the small station (TP#3 denoted by 808) on the right hand of it.
[0179] As referred herein, NR refers to new radio, and SSB refers to synchronization signal block.
[0180] When the above features are enabled, the BS could be able to power off or sleep for a while. The power-off level or sleep level could be two different types of BS sleeps, Power off may means a total power-off for some hours as the BS finds that the service from other TPs could fully fill the need of UEs. The other level is sleep level, which means the BS could fall into sleep for a while, like several minutes, as the BS may find that the service at that moment can full-fill the need of the UEs. As shown in FIG. 8, the two TPs (TP#4 denoted by 810 and TP#5 denoted by 812) in the right hand side are powered off, as the control channel can be done by the Macro BS (TP#6 denoted by 814) , and the UEs in the field are with small numbers of activated TPs, so two of the TPs can chose to power-off for power saving. In NR, channel measurement can be done in different reference signals, such as CSI-RS or SSB.
[0181] As referred herein, NR refers to new radio, and SSB refers to synchronization signal block.
[0182] It is noted that TPs referred in the present disclosure may include transmit and receive points (TRPs) . In other examples, the terms “TP” and “TRP” may be used interchangeably herein in the present disclosure.
[0183] Due to different TRP ON-OFF status which significantly affects interferences, link adaptation may not be accurate anymore. This disclosure proposes new measurement and report based on different TRP ON-OFF hypotheses to facilitate base stations (BSs) to make better decision on link adaptation of a TRP. As disclosed herein, a TRP ON-OFF status defines a configuration of one or more TRPs being configured to be ON or OFF in a communication system. For example, in the UCCF system 800 as shown in FIG. 8, a TRP ON-OFF status may correspond to a configuration where the TRP#4 denoted by 810 and the TRP#5 denoted by 812 are configured to be OFF and the other TRPs #0, #1, #2, #3, #6 are configured to be ON.This is only illustrative and is not intended to be limiting. In other examples, the TRP ON-OFF status may be any other suitable configuration where some TRPs are be configured to be ON and the other TRPs in a communication system are configured to be OFF. In some examples, each TRP ON-OFF status corresponds to a TRP ON and OFF hypothesis, which corresponds to an interference assumption, which will be discussed further below.
[0184] In NR, channel state information (CSI) information is measured using different reference signals. One typical example is using channel state information-reference signal (CSI-RS) where a base station, such as a gNB, may configure and send CSI-RS to a UE. The UE may perform measurement and reporting CSI to the gNB. The reported CSI may include, but not limited to CSI-RS resource indicator (CRI) , rank indicator (RI) , layer indicator (LI) , precoder matrix information (PMI) , channel quality indicator (CQI) , etc. After receiving CSI feedback via a CSI report, the gNB may perform link adaptation (LA) by selecting an appropriate number of transmission layers, precoder, modulation and coding scheme (MCS) , etc., according to available channel state information.
[0185] For improved CSI measurement, an accurate interference measurement (IM) in addition to channel measurement (CM) may also be used. The interference can be measured using non-zero power CSI-RS (NZP-CSI-RS) , where NZP CSI-RS is used to measure both the channel and interference. The interference can also be measured using CSI interference measurement (CSI-IM) method, where the resource elements assigned for CSI-IM can be directly used for interference measurement.
[0186] In future generation communication systems, energy savings may be important for overall operating efficiency. One technique to achieve network energy savings is by turning off one or more TRPs (e.g., TRP#4 and TRP#5 are OFF in the example of FIG. 8) in order to offload traffic to some other TRPs, as described earlier in a UCCF system, such as the UCCF system as described in FIG. 8. Generally, one or more TRPs in a UCCF system may follow an ON-OFF pattern in which a TRP can be “ON” for a period of time and “OFF” for another period of time. A TRP that is communicating with a UE for data transmission is considered as a serving TRP. Other TRPs that transmits signal that is not targeting to the UE at overlapping time frequency resources may result in interference to UE’s transmission signal, and these TRPs can be considered as interference or interfering TRPs. When a TRP is turning ON from OFF and turning OFF from ON, there may be a significant jump in interference which has impacts on a serving TRP. Therefore, the LA for the serving TRP with other TRP turning ON and OFF may not be accurate. Thus, it may be beneficial to provide CSI configuration, measurement and reporting that consider ON-OFF patterns of different TRPs in a wireless communication system, such as a UCCF system.
[0187] To resolve this issue, some implementations of the present disclosure depict methods for new channel measurement configuration and report considering different TRP ON and OFF patterns. This allows the serving TRP to perform better LA and scheduling decisions in these scenarios.
[0188] Aspects of the present disclosure generally relate to wireless communications, and more specifically to methods and systems for channel measurement and reporting that consider that the one or more TRPs may be turned ON / OFF for energy saving.
[0189] FIG. 9 illustrates an example of a signaling flow diagram according to an implementation of the present disclosure, which is a diagram for measurement configuration and report for different TRP ON-OFF hypotheses. Referring to FIG. 9, the signaling flow diagram depicts signaling exchanges among a network (NW) 921 and a UE 922 for RS configuration, measurement and reporting procedure for different interference hypothesis where different interference hypotheses may correspond to different TRP ON-OFF hypotheses (e.g. for two TRPs that may turn on / off) . Transmission by the NW 921 may be facilitated by one or more base station or TRP that is part of the NW 921 that is in communication with the UE 922. One example interference hypothesis may refer to a scenario where there are two TRPs within a proximity of the UE. A first TRP (e.g., a serving TRP) of the two TRPs is ON while the second TRP of the two TRPs is OFF. Another interference hypothesis may refer to the scenario where both the first and second TRPs are ON. In a first step, such as denoted by 902, the NW 921 may send RS configuration to the UE 922 where multiple RSs can be configured that corresponding to different interference hypotheses. At 904, the NW 921 may send the RS transmissions according to the configurations sent to the UE 922. At 906, the UE 922 may perform the channel and interference measurement based on the RSs. At step 908, the UE 922 may report the CSI to the NW 921. At 910, the NW 921 may use the reported CSI to make link adaption decisions. The decisions may include, but are not limited to, to turn ON or OFF TRPs, which TRP or TRPs to schedule the data transmission, what parameters are to be used for the data transmission, e.g., precoder, MCS etc. At 912, the NW 921 may schedule data transmission accordingly.
[0190] In some examples of this disclosure, sTRP transmission, mTRP transmission, or NCJT hypothesis refers to an assumption of which single TRP is used for data transmission or which multiple TRPs are used for CoMP based cooperative transmission (e.g. via NCJT scheme) . A TRP ON-OFF hypothesis refers to an assumption of which TRP or TRPs are turned ON and which TRP or TRPs are turned OFF. An ON TRP may refer to that a TRP can be used for data transmission. An OFF TRP may correspond to a complete shutdown or that the TRP is in a sleep state and not transmitting signals, which may include deep sleep, light sleep, micro-sleep etc.
[0191] As disclosed herein, sTRP refers to single transmit receive point, mTRP refers to multiple transmit receive point, CoMP refers to coordinated multi-point, and NCJT refers to non-coherent joint transmission.
[0192] The solution may involve two aspects. A first aspect is the configuration of measurement resources for RS. A second aspect is the measurement report (CSI feedback report) with respect to the configured RS. Measurement RS configuration (configuration of RS resources for measurement)
[0193] In some implementation, the UE may receive RS resource configuration that may link or associate multiple channel measurement resources and interference measurement resources together to perform joint measurement and CSI report for different interference hypotheses. The different interference hypotheses may be the result of different TRP ON and OFF hypotheses. Each different TRP ON and OFF hypothesis may be linked to (or in other words, associated with) a channel or interference measurement resource.
[0194] In other words, each TRP ON and OFF hypothesis or each TRP ON-OFF hypothesis corresponds to a respective different interference assumption. The respective different interference assumption is associated with a configuration of one or more interference or interfering devices (e.g., TRPs) . The configuration of the one or more interference devices may include configuring each of the one or more interference devices to be in an ON state or an OFF state. Alternatively, the configuration of the one or more interference devices means configuring each of the one or more interference devices to be in a woken-up state or a sleep state. In some other examples, the configuration of the one or more interference devices may comprise setting interference measurement resources to zero power from a given interference device to measure interferences in a given TRP ON-OFF hypothesis.
[0195] Fig. 10 illustrates an example of measurement configuration where one channel measurement resource may be linked to or associated with multiple interference measurement resources, e.g., CMR1 is linked to IMR1, IMR2, IMR3 and IMR4. The channel measurement resource may correspond to the measurement of a serving TRP; while each interference measurement resource may correspond to a different interference hypothesis, e.g., each interference measurement resource is used to measure interference corresponding to a different interference hypothesis. Each interference hypothesis may correspond to a given TRP ON-OFF hypothesis for interfering TRPs. An example of RS used for CMR can be a NZP-CSI-RS, which is configured to measure the channel. An example of resources used for IMR can beCSI-IM resources, which are resources configured to measure the interference. For CSI-IM resources, TRP1 can choose to not transmit any signal in the corresponding IM REs (i.e. using zero power) and thus the receiver UE can measure the interference without TRP1’s signal.
[0196] In some examples, the measurement configuration that associates a channel measurement resource (e.g., CMR1 in the example of FIG. 10) with multiple or a plurality of interference measurement resources (e.g., IMR1, IMR2, IMR3 and IMR4 in the example of FIG. 10) may be transmitted as measurement resource configuration from a network device to a UE, such as step 902 as shown in FIG. 9 or step 1604 in the method 1600 as shown in FIG. 16.
[0197] In some examples, the TRP1 is a serving TRP or main serving TRP, which will be discussed further with respect to FIG. 11. In some examples, the serving TRP or the main serving TRP is a TRP that is configured to communicate with a UE for data transmission (e.g., transmitting or receiving data) . The terms “serving TRP” and “main serving TRP” are interchangeably used in the present disclosure.
[0198] As disclosed herein, CMR refers to channel measurement resource, IMR refers to interference measurement resource, NZP-CSI-RS refers to non-zero-power channel state information reference signal, IMR refers to Interference measurement resource, CSI-IM refers to channel state information interference measurement, RE refers to resource element.
[0199] Channel measurement resources are generally resources used for channel measurement. Interference measurement resources are generally resources used for interference measurement. Although in many examples in this disclosure, CSI-RS may be used for channel measurement and potentially for interference measurement, and CSI-IM resources may be used for interference measurement, it is to be understood that there are other signals or signal types that may be used for channel and / or interference measurement. Examples or some signal types that be used for channel measurement and potentially interference measurement under different scenarios include, but not limited to, synchronization signal block (SSB) , tracking reference signal (TRS) , phase tracking reference signal (PTRS) , Demodulation reference signal (DMRS) . Therefore, the corresponding resources used for channel measurement (CM) and interference measurement (IM) may be considered as CMR or IMR. Each CMR or IMR may contain a single resource or a set of resources. For example, one CMR may contain CSI-RS with multiple CSI-RS ports.
[0200] Reference is now made with respect to FIG. 11, which presents an example of channel measurement and interference measurement resource configuration for different TRPs. The channel measurement and interference measurement resource configuration for different TRPs means different TRPs’ configuration (e.g., turning on or off some TRPs) in different TRP ON-OFF hypotheses. In some examples, the measurement resource configuration utilized in the example of FIG. 11 may be similar to the measurement resource configuration as described with reference to FIG. 10, which associates a channel measurement resource (e.g., CMR1 in the example of FIG. 10) with multiple or a plurality of interference measurement resources (e.g., IMR1, IMR2, IMR3 and IMR4 in the example of FIG. 10) .
[0201] FIG. 11 illustrates an example of resource configuration for channel measurement and interference measurement. Referring to FIG. 11, there are a set of 3 TRPs, where TRP1, denoted by 1102, is the main serving TRP that the measurement is targeting to, TRP2, denoted by 1104, and TRP3, denoted by 1106, are two main interference TRPs. FIG. 11 includes examples of resources that may be used by each of three TRPs. In each example, the X axis refers to time locations, while the Y axis refers to frequency locations. Each square unit may refer to a unit time frequency resource, for example, each square may represent a RE in a time frequency resource grid. A time frequency resource located in a same time frequency resource of a different TRP may create interference for each other for the transmission from different TRPs. In this example, CMR1 is configured to measurement channel H1 of TRP1. For better measurement performance, TRP2 1104 and TRP3 1106 may be turned off at the resource for CMR1. Note for the channel measurement, if the TRP2 1104 and TRP3 1106 are ON and transmitting signal, the channel measurement may still be performed, the only difference for the channel measurement is that the interference, in the case when the TRP2 1104 and the TRP3 1106 are ON, is higher and thus measurement performance may not be as good as when the interference TRPs (e.g., TRP2 1104 and TRP3 1106) are turned OFF.
[0202] IMR1 may be used to measure the interferences other than TRP2 1104 and TRP3 1106, thus the TRP2 1104 and TRP3 1106 are turned OFF at the time location of IMR1. IMR2 can be used to measure interference from the TRP2 1104 in an interference assumption / hypothesis where the TRP3 1106 is turned off. IMR3 can be used to measure interference from the TRP2 1104 and the TRP3 1106, as both TRPs are turned ON. IMR4 can be used to measure the interference from the TRP3 1104 in an interference assumption / hypothesis where the TRP2 can be turned off for the time of IMR4. It is noted that a direct interference measurement on IMR2 corresponds to an interference hypothesis when TPR2 1104 is ON and TRP3 1106 is OFF, interference from TRP2 and interferences outside of TRP2 and TRP3 (e.g., interferences from TRPs other than TRP2 and TRP3) could be measured or derived. Furthermore, because the interferences outside of TRP2 and TRP3 (e.g., TRPs other than TRP2 and TRP3) can be derived based on interference measurement on IMR1, interference from TRP2 alone could be derived or calculated based on the interferences from TRPs other than TRP2 and TRP3 (e.g., outside from TRP2 and TRP3) obtained from interference measurement using IMR1 and the interference measurement on IMR2. Similarly, a direct interference measurement on IMR3 corresponds the hypothesis where TRP2 and TRP3 are ON, which also includes interferences from TRPs other than TRP2 and TRP3, in addition to interferences from TRP2 and TRP3. Thus, interferences from TRP2 and TRP3 alone could be derived based on the interference measurement on IMR3 and the interference measurement on IMR1. What is more, a direct interference measurement on IMR4 corresponds the hypothesis where TRP2 is OFF and TRP3 are ON, which also includes interference from TRPs other than TRP2 and TRP3, in addition to interference from TRP3. Therefore, interference from TRP3 alone could be derived based on the interference measurement on IMR4 and the interference measurement on IMR1. This way, each IMR corresponds to a different interference hypothesis which corresponds to a different TRP ON-OFF hypothesis.
[0203] In other words, the different TRP-ON-OFF hypothesis refers to a different configuration (e.g., turned on / off) of one or more interference TRPs.
[0204] To get potential measurements of interferences for the TRP1 1102 from different TRP ON-OFF hypotheses with respect to the TRP2 1104 and the TRP3 1106, the potential configuration can be CMR1, IMR1, IMR2, IMR3 and IMR4 all linked or associated together. In some other scenarios, some interference measurements with respect to a TRP ON-OFF hypothesis can be derived from measurements of other TRP ON-OFF hypothesis, thus no resource needs to be configured for that hypothesis. For example, another potential configuration can be CMR1, IMR1, IMR2 and IMR4 linked together, where the interferences with respect to TRP2 1104 and TRP3 1106 being both ON that could be measured by IMR3 if configured in Fig. 11 and can be derived by adding interference from TRP2 1104 and TRsP3 1106 together that are obtained from existing resources.
[0205] Stately differently, one possible configuration may include associating CMR1, IMR1, IMR2 and IMR4 together, there is no association configuration for IMR3. Such possible configuration may enable interferences corresponding to 4 different hypotheses to be measured accurately. For example, a first hypothesis is a configuration when both TRP2 and TRP3 are OFF, a first interference measurement can be measured on IMR1. A second hypothesis is a configuration when TRP2 is ON and TRP3 is OFF, as a second interference measurement can be measured on IMR2. A third hypothesis is a configuration when TRP2 is OFF and TRP3 is ON, a third interference measurement can be measured on IMR4. Another interference measurements may be performed to measure interferences corresponding to a further hypothesis when both TRP2 and TRP3 are ON, which is referred as the fourth interference measurement. The fourth inference measurement may be obtained, derived, or calculated based on interference from TRP2 alone, interference from TRP3 alone and interferences from TRPs outside of TRP2 and TRP3 together. Each of the interference from TRP2 alone, interference from TRP3 alone, and the interferences from TRPs outside of TRP2 and TRP3 can be respectively calculated from measurement results from IMR1, IMR2 and IMR4. Therefore, in the configuration of CMR1 being associated with IMR1, IMR2 and IMR4 (without associating IMR3) , interference corresponding to the above 4 interference hypothesis (e.g., the first hypothesis, the second hypothesis, the third hypothesis, and the fourth hypothesis) may be derived from the first, second, and third interference measurements described above. In this example, although CMR1 is associated with IMR1, IMR2and IMR4 without configuring IMR3, the fourth inference measurement could be still calculated or derived based on the first, second, and third interference measurements. Thus, in this scenario, the UE may report CSI that corresponds to the above four hypotheses even though only three interference measurement resources (IMR1, IMR2, and IMR4) are configured and associated with CMR1.
[0206] Thus, one TRP ON-OFF hypothesis corresponds to interference measurements from a particular configuration of one or more interference TRPs, and then interference of another TRP ON-OFF hypothesis may be measured based on the interference measurements associated with the particular configuration of the interference TRPs. For example, a first TRP ON-OFF hypothesis may correspond to first interference measurements from a first configuration of the one or more interference TRPs, and a second TRP ON-OFF hypothesis may correspond to second interference measurements from a second configuration of the one or more interference TRPs. In some implementations, the second interference measurements may be calculated based on the first interference measurements and other interference measurements.
[0207] In the example, the IMR can be measured while other TRPs are ON-OFF following the corresponding TRP ON-OFF hypothesis. However, the measurement can still be done without turning off corresponding TRPs by simply setting the same resource as the IMR of the corresponding off-TRP to zero power (i.e., mimic no interference from an OFF TRP) . For example, this can be achieved by using zero power channel state information reference signal (ZP-CSI-RS) .
[0208] In other words, in a particular TRP ON-OFF hypothesis, interferences could be measured without turning off one or more TRPs (e.g., interfering TRPs) . Rather, zero power signal may be transmitted on interference measurement resources from an interferring TRP that is supposed to be an OFF TRP in the hypothesis to measure the interferences in the particular TRP ON-OFF hypothesis. For example, ZP-CSI-RS may be configured on interfering TRPs on REs that correspond to the IMR of the serving TRP rather than turning those interfering TRPs OFF
[0209] FIG. 12 illustrates an example when multiple channel measurement resources (CMRs) are linked or associated together, in accordance with alternative embodiments.
[0210] Alternatively, the multiple channel measurement resources may be linked or associated together for measurement configuration and report as illustrated in FIG. 12. The multiple CMRs may correspond to the same channel of a serving TRP, however, each CMR is also used to measure interference that corresponds to a different interference hypothesis. Each interference hypothesis may correspond to a given TRP ON-OFF hypothesis for interfering TRPs.
[0211] In some examples, the measurement configuration that associates a plurality of channel measurement resources (e.g., CMR1, CMR2, CMR3 and CMR4) in the example of FIG. 12) together may be transmitted as measurement resource configuration from a network device to a UE, such as step 902 in the example of FIG. 9 or step 1704 in the method 1700 as shown in FIG. 17.
[0212] Reference is now made with respect to FIG. 13, which shows an example of channel measurement and interference measurement resource configuration for different TRPs.
[0213] FIG. 13 illustrates an example of resource configuration for multiple channel measurement resources. Referring to FIG. 13, there are a set of 3 TRPs (e.g., TRP1 denoted by 1302, TRP2 denoted by 1304, TRP3 denoted by 1306) , where TRP1 1302 is a main serving TRP that the measurement is targeting to, TRP2 1304 and TRP3 1306 are two main interference TRPs. In this example, CMR1, CMR2, CMR3 and CMR4 are all configured to measure channel of TRP1 (denoted as H1) . Furthermore, CMR1 is also configured to measure the interference outside of TRP2 and TRP 3. Therefore, TRP2 1304 and TRP3 1306 may be turned OFF at the resource for CMR1. CMR2 may be also used to measure interference from TRP2 1304, thus TRP2 1304 is turned on with data transmission while TRP3 1306 is turned off in the resources overlapped with CMR2. CMR3 may be also used to measure interference from TRP2 1304 and TRP3 1306, as both TRPs are turned ON. CMR4 can be used to measure the interference from TRP3 1306, and TRP2 1304 can be turned OFF for the time of CMR4. This way, all CMRs are linked to measure the same channel, but each CMR is also used to measure interference corresponding to a different interference hypothesis which may also correspond to a different TRP ON-OFF hypothesis.
[0214] It is noted that in some examples, an interference measurement on CMR2 corresponds to an interference hypothesis when TPR2 1304 is ON and TRP3 1306 is OFF, interference from TRP2 and interferences outside of TRP2 and TRP3 (e.g., interferences from TRPs other than TRP2 and TRP3) could be measured or derived. Furthermore, because the interferences outside of TRP2 and TRP3 (e.g., TRPs other than TRP2 and TRP3) can be derived based on interference measurement on CMR1, interference from TRP2 alone could be derived or calculated based on the interferences from TRPs other than TRP2 and TRP3 (e.g., outside from TRP2 and TRP3) obtained from interference measurement using CMR1 and the interference measurement on CMR2. Similarly, an interference measurement on CMR3 corresponds a hypothesis where TRP2 and TRP3 are ON, which also includes interferences from TRPs other than TRP2 and TRP3, in addition to interferences from TRP2 and TRP3. Thus, interferences from TRP2 and TRP3 alone could be derived based on the interference measurement on CMR3 and the interference measurement on CMR1. What is more, an interference measurement on IMR4 corresponds a hypothesis where TRP2 is OFF and TRP3 are ON, which also includes interference from TRPs other than TRP2 and TRP3, in addition to interference from TRP3. Therefore, interference from TRP3 alone could be derived based on the interference measurement on CMR4 and the interference measurement on CMR1. This way, each CMR corresponds to a different interference hypothesis or a different TRP ON-OFF hypothesis. The terms “interference hypothesis” and “TRP ON-OFF hypothesis” could be interchangeably utilized in the present disclosure.
[0215] Therefore, associating a plurality of channel measurement resources together may help to measure interferences caused by different interference TRPs (e.g., the TRP2 1304 and the TRP3 1306) in different TRP ON-OFF hypothesis.
[0216] Similarly, to get potential measurement of interference for TRP1 1302 from different TRP ON-OFF hypothesis with respect to TRP2 1304 and TRP3 1306, the potential configuration can be CMR1, CMR2, CMR3 and CMR4 all linked together. In some other scenarios, some interference measurements with respect to a TRP ON-OFF hypothesis can be derived from measurement of other TRP ON-OFF hypothesis, thus no resource needs to be configured for that hypothesis. For example, another potential configuration can be CMR1, CMR2 and CMR4 linked together (without associating CMR3) , where the interferences (caused by both TRP2 1304 and TRP3 1306, when TRP2 and TRP3 are both ON) , that could be measured by CMR3 in FIG. 13, can be derived by adding interference from TRP2 and TRP3 that are obtained from existing resources.
[0217] Stately differently, one possible configuration may include associating CMR1, CMR2, and CMR4 together without associating CMR3. Such possible configuration may enable interferences corresponding to 4 different hypotheses to be measured accurately. For example, a first hypothesis is a configuration when both TRP2 and TRP3 are OFF, a first interference measurement can be measured on CMR1. A second hypothesis is a configuration when TRP2 is ON and TRP3 is OFF, as a second interference measurement can be measured on CMR2. A third hypothesis is a configuration when TRP2 is OFF and TRP3 is ON, a third interference measurement can be measured on CMR4. Another interference measurements may be performed to measure interferences corresponding to a further hypothesis when both TRP2 and TRP3 are ON, which is referred as the fourth interference measurement. The fourth inference measurement may be obtained, derived, or calculated based on interference from TRP2 alone, interference from TRP3 alone and interferences from TRPs outside of TRP2 and TRP3 together. Each of the interference from TRP2 alone, interference from TRP3 alone, and the interferences from TRPs outside of TRP2 and TRP3 can be respectively calculated from measurement results from CMR1, CMR2 and CMR4. Therefore, in the configuration of CMR1 being associated with CMR2and CMR4 (without associating CMR3) , interference corresponding to the above 4 interference hypothesis (e.g., the first hypothesis, the second hypothesis, the third hypothesis, and the fourth hypothesis) may be derived from the first, second, and third interference measurements described above. In this example, although CMR1 is associated with CMR2and CMR4 without configuring CMR3, the fourth inference measurement could be still calculated or derived based on the first, second, and third interference measurements. Thus, in this scenario, the UE may report CSI that corresponds to the above four hypotheses even though only three channel measurement resources (CMR1, CMR2, and CMR4) are configured and associated together.
[0218] Thus, one TRP ON-OFF hypothesis corresponds to interference measurements from a particular configuration of one or more interference TRPs, and then interference of another TRP ON-OFF hypothesis may be measured based on the interference measurements associated with the particular configuration of the interference TRPs. For example, a first TRP ON-OFF hypothesis may correspond to first interference measurements from a first configuration of the one or more interference TRPs, and a second TRP ON-OFF hypothesis may correspond to second interference measurements from a second configuration of the one or more interference TRPs. In some implementations, the second interference measurements may be calculated based on the first interference measurements and other interference measurements.
[0219] The above linked resource may be one set of resources, a NW can configure multiple set of resources such that a UE can report the best set of resources. Different set of resources usually correspond to different beams. This is similar to CSI-report without the above linked resource scenario, where the NW can configure multiple CSI-RS resources and the UE may report the best CSI-RS resource through measurement through CRI in a CSI feedback report. Measurement report
[0220] In some implementations, after the network (NW) provides RS configurations and sends RSs corresponding to the RS configurations, the UE may perform channel and interference measurements and send channel measurement results via a CSI report to the NW.
[0221] In some examples, for the linked RS resources described above (e.g., the example as described with reference to FIG. 10 or the example as described with reference to FIG. 12) , the UE may provide a joint CSI report that includes a respective CSI report associated with a different TRP ON-OFF hypothesis (corresponding to a different respective interference measurement) to help the NW make scheduling and TRP ON-OFF decisions. The joint CSI report may contain multiple sub-CSI reports a respective one of which corresponds to a different TRP ON-OFF hypothesis. Each sub-CSI report may correspond to a hypothesis measured by an IMR. Additional sub-CSI reports may be reported based on the hypothesis that can be derived from current measurement. For example, a BS may configure measurement resources of CMR1 associated with IMR1, IMR2 and IMR4 as shown in Figure 11 but without associating with IMR3. A UE may report three sub-CSI reports that correspond to channel measurement from CMR1 and interference measurements based on IMR1, IMR2 and IMR4, respectively. Furthermore, because an interference measurement corresponding to the interference hypothesis (when both TRP2 and TRP3 are ON) can be derived or calculated from the interference measurements on IMR1, IMR2 and IMR4, the UE may be configured to report an addition sub-CSI report with channel measurement from CMR1 and the interference measurement corresponding to the interference hypothesis when both TRP2 and TRP3 are ON.
[0222] For example, in the example of FIG. 11, if the IMR2 is used to measure interference from TRP2 1104, and the IMR4 is used to measure interference from TRP3 1106, IMR1 is used to measure interference from other devices outside of the TRP set (e.g., the TRP set including TRP1 1102, TRP2 1104, and TRP3 1106) , the UE may derive interference measurements when both TRP2 1104 and TRP3 1106 are ON. Hence, the UE may report an additional sub-CSI for a hypothesis where TRP2 1104 and TRP3 1106 are ON without utilizing or associating a corresponding IM resource (e.g., IMR3) .
[0223] Each sub-CSI report may contain separate CSI content, or it may share a base report, and only differential values for different hypothesis are additionally reported. The report format may include, but not limit to, one or more of the following examples: A joint CSI report may include a single shared CRI and multiple sets of parameters, such as, but not limited to RI, PMI, LI, CQI.
[0224] As disclosed herein, RI refers to rank indicator, PMI refers to precoding matrix indicator, LI refers to layer indicator, and CQI refers to channel quality indicator.
[0225] If there are multiple sets of reference signal (RS) resources configured, the UE may report which set of RS resources is best , e.g., provide the best measurement results, via CRI. Each set of RS resources may include a linked CMR and multiple IMRs or multiple CMRs, as described in the RS configuration (e.g., FIG. 10 or FIG. 12) . If only one set of RS resources is configured, then in some examples, CRI may not be reported or a fixed CRI is reported. Then for each interference hypothesis or each TRP ON-OFF hypothesis, the UE may report a separate set of parameters, that may include one or more of RI, PMI, LI, CQI for each hypothesis. Each interference hypothesis may correspond to an IMR or CMR. In some scenarios, only multiple CMRs are configured. In such case, the UE may report the RS having a best channel measurement from the CMR, however, only one set of IMRs are configured and shared for all CRI and to be linked to the CMRs. The UE reports a base CSI, with parameters including, but not limited to CRI, RI, PMI, LI, and CQI and differential CQI for each hypothesis for improved link adaption.
[0226] As disclosed herein, CRI refers to channel state information reference signal resource indicator.
[0227] Again, there may be multiple sets of RS resources configured for report based on CRI, or there may be a single set of RS resources configured where no CRI is reported or a fixed CRI is to be reported. As with a regular CSI report, the UE may report parameters, such as, but not limited to, CRI, RI, PMI, LI, CQI, based on one base RS setting, e.g., based on CMR1 and IMR1 for channel and interference measurements or based on all linked CMRs and IMRs (e.g., CMR1 is associated with IMR1, IMR2, IMR3, and IMR4 in the example of FIG. 10) . Then, in order to reduce overhead and due to the common channel experienced for the measurement (just interference being different) , the base CRI, RI, PMI, LI value may be shared or common for different interference hypothesis. However, the CQI value, which represents channel quality of each codeword, can be different for different interference hypotheses, thus a separate CQI or differential CQI can be reported for each interference hypothesis that is different from base interference hypothesis. Note that differential CQI for each hypothesis and a common set of other parameters are just one example, the report can in general contain a set of common parameters for all linked resource and a separate set of parameters in full or differential format for each interference hypothesis. How to divide the common and separate set of parameters may be predefined or configured by the NW. The UE reports a base reference signal received power (RSRP) and / or signal-to-interference-plus-noise ratio (SINR) for different beams, and differential RRSP / SINR for different hypotheses.
[0228] In some scenarios, such as, but not limited to, high frequency and / or an analog beamforming scenario, a full CSI report may not be needed. The UE may typically only report RSRP or SINR for a given beam represented by a RS or a RS port (may be CSI-RS, SSB or other RS) . In this case, the UE may report RSRP and / or SINR for a base interference hypothesis and report differential RSRP and / or SINR for all other interference hypothesis.
[0229] As disclosed herein, CSI-RS refers to channel state information reference signal, SSB refers to synchronization signal block.
[0230] Stated differently, the channel state information (CSI) report transmitted by the UE may comprise a first reference signal received power (RSRP) and respective differential reference signal received powers with respect to the first reference signal received power for each respective interference measurement that corresponds to each respective interference hypothesis / TRP ON-OFF hypothesis. As depicted above, each respective interference measurement or each respective TRP ON-OFF hypothesis is associated with a configuration of one or more TRPs being in an ON state or in an OFF state. In some examples, the channel state information (CSI) report transmitted by the UE may comprise a first signal-to-interference-plus-noise ratio (SINR) and respective differential signal-to-interference-plus-noise ratios with respect to the first SINR for each respective interference measurement that corresponds to each respective interference hypothesis / TRP ON-OFF hypothesis.
[0231] In some examples, the network (NW) may configure the RS at locations corresponding to different TRP ON-OFF hypothesis for the corresponding measurement. It may be beneficial to perform the measurement over a shorter time period rather than spread them over a larger time span. These have the following benefits: (1) . It may save the network energy and the UE energy as both the TRP and the UE may perform all the RS transmission, measurement and report in a shorter period, allowing the TRP and the UE to sleep at other times and not to constantly wake up to do measurement; (2) . A channel aging effect during the shorter time period is less, which allows for better and more accurate measurement results.
[0232] FIG. 14 demonstrates measurement windows for RS configurations and CSI reports for different TRP ON-OFF hypothesis.
[0233] As presented in FIG. 14, which shows an example of performing such interference measurements as illustrated in the examples of FIG. 11 or FIG. 13 in a small measurement window. FIG. 14 illustrates an example including a measuring window 1410 over which channel measurements and interference measurements may be taken for TRP1, TRP2 and TRP3. The vertical axis for each of the three TRPs is an indication if the TRPs are ON or OFF (for each of the three TRPs, the bottom boundary line is representative of OFF and the top boundary line is representative of ON) and the horizontal axis is an indication of time. Referring to FIG. 14, TRP1, denoted as 1402, is a main serving TRP, which sometimes may be referred to as an anchor TRP or a coverage TRP. TRP1 1402 may be kept awake most of the time in some examples. However, this is just an example, it is also possible that TRP1 1402 may have its own sleep pattern. For a UCCF system (e.g., the UCCF system 800 as shown in FIG. 8) , the network NW may coordinate with multiple TRPs to have or configure some ON-OFF pattern (e.g., a respective ON-OFF pattern) for each TRP. The ON-OFF pattern may be also a sleep pattern. In some examples, the ON-OFF pattern may also be associated with DRX / DTX periodicity etc. The ON-OFF pattern for each TRP may be periodic. The NW may configure multiple TRPs to be woken up (turned ON) during a similar time window such that the UE can do all the measurements with respect to the multiple TRPs at that time window.
[0234] The TRP ON / OFF pattern may be configured as a periodic pattern. For example, the BS may configure a starting offset, a periodicity of the ON / OFF pattern, an ON time and / or OFF time for each period for each TRP ON / OFF pattern. A TRP ON / OFF pattern may be associated with a TRP or cell DTX / DRX configuration. The TRP or cell DTX / DRX may be also configured with a starting offset, a periodicity of the DTX / DRX pattern, an ON time and / or OFF time for each period of the DTX / DRX pattern. A cell or TRP DTX / DRX configuration means no data scheduling or transmission, no CSI-RS for cell or TRP in the DTX off time, while no data reception or reception of CSI-report for the cell or TRP in the DRX off time. Similarly, a TRP ON-OFF pattern may be associated or indicated by a sleep pattern, in a similar periodic way.
[0235] As disclosed herein, DRX refers to discontinuous reception, and DTX refers to discontinuous transmission.
[0236] In some examples, one method to achieve that is that, instead of having the same ON time for different interfering or interference TRPs (e.g., TRP2 1404 and TRP3 1406) , there is a slight shift (e.g., slight time difference) in ON time for TRP2 1404 and TRP3 1406. This creates opportunities within the UE measurement window denoted by 1410 that different TRP ON-OFF hypothesis may be created within that window. Referring again to FIG. 14, at time 1420, CM1 may be measured when TRP1 is ON and TRP2 and TRP3 are OFF, at time 1425, IM1 may be measured when TRP1 is ON and TRP2 and TRP3 are OFF, at time 1430, CM2 may be measured when TRP1 and TRP2 are ON and TRP3 is OFF, at time 1435, IM2 may be measured when TRP1 and TRP2 are ON and TRP3 is OFF, at time 1440, CM3 may be measured when TRP1 and TRP3 are ON and TRP2 is OFF, at time 1445, IM3 may be measured when TRP1, TRP2 and TRP3 are ON, and at time 1455, IM4 may be measured when TPR1 and TRP3 are ON and TRP2 is OFF. The CMRs and IMRs configuration based on a method described with reference to FIG. 11 and Fig. 13 can be shown in Fig. 14, using option 1: NZP-CSI-RS and CSI-IM for channel and interference measurements and option 2: NZP-CSI-RS for both channel and interference measurements, respectively and option 3: NZP-CSI-RS for channel measurement and both NZP-CSI-RS and CSI-IM for interference measurements.
[0237] As disclosed herein, NZP-CSI-RS refers to non-zero-power channel state information reference signal, and CSI-IM refers to channel state information interference measurement.
[0238] With reference to FIGs. 11, 13, and 14, the measurement window for the TRP1 1402, TRP2 1404 and TRP3 1406 could be applied to the examples of FIGs. 11 and 13. For example, in the example of FIG. 11, the TRP1 1102 may be kept awake most of the time, such as during a UE measurement window or a UE measuring window (e.g., the UE measurement window 1412) . The TRP2 1104 may be turned ON at a time (denoted by 1470) that is earlier than a time (denoted by 1480) when the TRP3 1106 is turned ON. There is a slight time shift between turning the TRP2 1104 ON and turning the TRP3 1106 ON, which may enable the different TRP ON-OFF hypothesis (e.g., one TRP ON-OFF hypothesis where the TRP2 1104 is turned ON and the TRP3 1106 is turned OFF, and another TRP ON-OFF hypothesis where the TRP2 1104 is turned OFF and the TRP3 1106 is turned ON) to be generated. In the example of FIG. 11, with respect to channel measurements (CMs) , each of one or more reference signals configured for the CMs may include an NZP-CSI-RS. For interference measurements (IMs) , channel state information interference measurement (CSI-IM) resources may be configured.
[0239] In the example of FIG. 13, the TRP1 1302 may be kept awake most of the time, such as during a UE measurement window (e.g., the UE measurement window 1412) . The TRP2 1304 may be turned ON at a time (denoted by 1470) that is earlier than a time (denoted by 1480) when the TRP3 1306 is turned ON. There is a slight time shift between the time of turning the TRP2 1304 ON and the time of turning the TRP3 1306 ON, which may enable the different TRP ON-OFF hypothesis (e.g., one TRP ON-OFF hypothesis where the TRP2 1304 is turned ON and the TRP3 1306 is turned OFF, and another TRP ON-OFF hypothesis where the TRP2 1304 is turned OFF and the TRP3 1306 is turned ON) to be generated. In the example of FIG. 13, each of one or more reference signals configured for the interference measurements (IMs) may include an NZP-CSI-RS.
[0240] As described above, for example with regard to FIG. 14, a UE measurement window may be used as an efficient way to perform measurements in a shorter time period for different TRP ON-OFF hypotheses.
[0241] In order to configure the use of such a measurement window, each CMR and IMR may be configured separately and linked to a resource group such that the UE may link CMR and IMR together for a measurement report. In other words, each CMR and IMR may have its own flexible resource configuration and could be associated with respect to one or another or each other in some implementation. In some examples, the time frequency location and orthogonal cover code (OCC) used for each resource may be flexibly configured. That means, resources for each CMR and IMR are configured separately.
[0242] The BS may ensure TRP ON-OFF and other configurations are aligned with a target measurement.
[0243] FIG. 15 shows an example of RS configuration within a small-time window. The small-time window may include a UE measurement time window.
[0244] In some examples, the multiple CM and IM may be configured together in one UE measuring window. In a particular example, as shown in FIG. 15, CMR1, CMR2, CMR3, and CMR (and optionally IM) may be configured in different slots with a starting slot 1510 and two gaps 1520 and 1530 between two different CM (e.g., CM1and CM2 or CM2 and CM3) being configured. Note that FIG. 15 does not show IMR, but IMR may be located in the same slot as CMR or have its own time domain configurations (e.g. in different symbols or different frequency resources) . Here a slot is an example of time unit. Other time units, such as symbols and subframes may be also used.
[0245] IMR may be located in the same slot as CMR with a different time frequency location in the slot. An example of this may be same time location, but different frequency location.
[0246] In another example, a TRP ON-OFF pattern and a UE measurement window may be defined using something similar to a DTX or DRX configuration.
[0247] The UE may report hypothesis based on what the UE measures or occurs in the UE measurement window.
[0248] For a UE measurement window-based report, such as examples described in FIG. 14 and FIG. 15, the UE may know potential TRP ON-OFF hypotheses that the UE may experience during the measurement window. Thus, the UE may report sub-CSI based on the TRP ON-OFF hypotheses the UE experiences in the UE measurement window. These hypotheses may also be the potential scenarios the UE experiences in the data transmission and thus are useful for the network to make TRP selection and link adaptation related decisions.
[0249] The notation of CM and CMR, and of IM and IMR may be exchangeable in this disclosure. For the measurement described in the example of this disclosure, it is possible to utilize an actual TRP ON-OFF scenario to perform the measurement of RS corresponding to the interference measurement of that hypothesis. In some scenarios, this may not be the most convenient way to configure the RS. Thus, the network may represent TRP ON-OFF hypotheses for measurement by allowing a TRP to transmit data or use a zero-power signal (e.g., zero power channel state information reference signal) that is overlapping with the IM or CM measurement resources (IMR or CMR) to mimic the scenario of interference created by an ON and OFF TRP hypothesis, respectively.
[0250] In addition, although in this disclosure, the different interference assumptions corresponds to different TPR ON-OFF hypotheses, the RS configuration and report method may be applicable to different interference caused by other factors or scenarios, e.g. different traffic pattern or different scheduling pattern from different interfering or interference TRPs. If the measurement shares a same channel condition and different interference assumptions (e.g., respective different interference measurements) , the method as described herein can be applied.
[0251] In some examples, the measurement window (e.g., the UE measurement / measuring window) may be one way or one example to configure the RS resources. In practice, a NW can also configure different RSs at different time frequency locations and with different sequences or orthogonal cover codes based on the NW decisions. It should be understood that, in the example of FIGs. 11, 13 and 14, although the TRP1 1102, the TRP1 1302 and the TRP1 1402 are denoted by reference numbers 1102, 1302, 1402, in some embodiments, the TRP1 1102, the TRP1 1302 and the TRP1 1402 may be an identical serving TRP. Furthermore, in some embodiments, the TRP2 1104, the TRP2 1304 and the TRP2 1404 may be an identical interference TRP, and in some embodiments, the TRP3 1106, the TRP3 1306 and the TRP3 1406 may be an identical interference TRP. In other examples, the TRP1 1102, the TRP1 1302 and the TRP1 1402 may be different devices. Alternatively, the TRP2 1104, the TRP2 1304 and the TRP2 1404 may be different devices, and the TRP3 1106, the TRP3 1306 and the TRP3 1406 may be different devices as well.
[0252] FIG. 16 is a signal flow diagram 1600 illustrating communication between a network device 1601 and a terminal device 1602, which might for example be a UE 802 as shown in FIG. 8, which may enable channel measurements and interference measurements to be performed, in accordance with example embodiments.
[0253] At step 1604, the terminal device 1602 receives measurement resource configuration that associates a channel measurement resource with a plurality of interference measurement resources. The channel measurement resource corresponds to a channel measurement associated with a first network device, such as a serving network device or a serving TRP. In some examples, the channel measurement resource may be utilized to measure a channel between the network device 1601 (e.g., a serving TRP) and the terminal device 1602 (e.g., the UE 802) . In some examples, step 1604 may include some of the configuration information transmitted in step 902 of FIG. 9.
[0254] In some examples, referring back to FIG. 10, the measurement resource configuration at step 1604 may include the measurement resource configuration in the example of FIG. 10. The measurement resource configuration associates a channel measurement resource (e.g., CMR1) with a plurality of interference measurement resources (e.g., IMR1, IMR2, IMR3 and IMR4) .
[0255] Each of the plurality of interference measurement resources corresponds to a respective interference measurement in a plurality of interference measurements. The respective interference measurement may be associated with an interference assumption or an interference hypothesis. In some examples, the interference assumption or the interference hypothesis may include TRP ON-OFF hypothesis. The interference assumption or the interference hypothesis may include a configuration of one or more second network devices. The one or more second network devices may include interference or interfering TRPs.
[0256] In some examples, the configuration of the one or more second network devices is related to: (1) a second network device of the one or more second network devices being configured to be in an ON state or in an OFF state; (2) a second network device of the one or more second network devices being configured to be in a woken up state or in a sleep state.
[0257] At step 1606, optionally, the terminal device 1602 may receive one or more first reference signals for the channel measurement associated with the first network device. In some examples, each of the one or more first reference signal comprises a non-zero-power channel state information reference signal (NZP-CSI-RS) . In some examples step 1606 may be consistent with transmission made in or similar to step 904 of FIG. 9 for the channel measurement.
[0258] At step 1608, optionally, the terminal device 1602 may perform the channel measurement associated with the first network device based on the received one or more first reference signals and the channel measurement resource. In some examples, step 1608 may be consistent with transmissions made in or similar to step 906 of FIG. 9 based on the channel measurement resource (e.g., CMR1 as shown in the example of FIG. 10) . In some examples, the channel measurement may be taken within a measuring window, such as the measuring window 1410 in the example of FIG. 14.
[0259] At step 1610, optionally, the terminal device 1602 may perform a respective interference measurement. In some examples, the respective interference measurement is performed based on a corresponding one of the plurality of interference measurement resources. In some examples, step 1610 may be consistent with transmissions made in step 906 of FIG. 9 based on the interference measurement resource (e.g., IMR1-IMR4 as shown in the example of FIG. 10) . Furthermore, step 1610 may be performed in the example of FIG. 11 to perform different respective interference measurement in various TRP ON-OFF hypotheses. In some examples, the different respective interference measurement may be taken within a measuring window, such as the measuring window 1410 in the example of FIG. 14.
[0260] In some alternative examples, the terminal device 1602 may perform additional interference measurements associated with another corresponding configuration of the one or more second network devices based on the plurality of interference measurement resources. In such case, an interference measurement is performed based on the additional interference measurements.
[0261] At step 1612, optionally, the terminal device 1602 may transmit a channel state information (CSI) report, such as based on the channel measurement resource and the plurality of interference measurement resources. In some examples, step 1612 may be consistent with transmission made or similar to in step 908 of FIG. 9.
[0262] In some examples, the CSI report comprises at least one of: channel state information reference signal resource indicator (CSI-RS resource indicator) ; rank indicator (RI) ; precoding matrix indicator (PMI) ; layer indicator (LI) ; and channel quality indicator (CQI) .
[0263] In some implementation, the CSI report comprises a plurality of sub-reports, and each of the plurality of sub-reports corresponds to the respective interference measurement. Each of the plurality of sub-reports comprises a respective channel state information associated with the respective interference measurement.
[0264] Alternatively, the CSI report may comprise a first parameter set for channel state information for the plurality of interference measurements and a respective set of second parameter sets for each respective interference measurement. The first parameter set may include a common parameter set for the plurality of interference measurements. Each second parameter set is an individual parameter set that corresponds to each respective interference measurement.
[0265] In some examples, the CSI report may comprise a base channel state information report and a respective differential channel quality indicator for each respective interference measurement.
[0266] In some applications, the CSI report may comprise a first reference signal received power (RSRP) and respective differential reference signal received powers with respect to the first reference signal received power for each respective interference measurement.
[0267] Optionally, the CSI report may comprise a first signal-to-interference-plus-noise ratio (SINR) and respective differential signal-to-interference-plus-noise ratios with respect to the first signal-to-interference-plus-noise ratio for each respective interference measurement.
[0268] In some embodiments, at step 1614, the network device 1601 may make scheduling decisions based on the CSI report. In some examples, step 1614 may be consistent with or similar to step 910 of FIG. 9.
[0269] In some embodiments, at step 1616, the terminal device 1602 may receive scheduling information for data based on the channel state information report. In some examples, step 1616 may be consistent with or similar to step 912 of FIG. 9. In some examples, the scheduling information pertaining to a window for performing a channel measurement and one or more interference measurements may be consistent to the configuration discussed in the example of FIG. 14.
[0270] Such a method of associating a channel measurement resource with a plurality of interference measurement resources may help to improve accuracy of channel measurement and interference measurements, which may aid in providing an accurate link adaption. Furthermore, because the network devices (e.g., TRPs) in a communications system (e.g., UCCF system) may be turned ON or OFF dynamically, the energy for the network and the UE may be still saved in the communications system.
[0271] FIG. 17 is a signal flow diagram 1700 illustrating communication between a network device 1701 and a terminal device 1702, which might for example be a UE 802 as shown in FIG. 8, which may enable channel measurements and interference measurements to be performed, in accordance with alternative example embodiments.
[0272] At step 1704, the terminal device 1702 receives measurement resource configuration that associates a plurality of channel measurement resources with a first network device. The first network device may include a serving network device or a serving TRP. In some examples, the plurality of channel measurements resources may be utilized to measure a channel between a network device 1701 (e.g., a serving TRP) and a terminal device 1702 (e.g., the UE 802) . Furthermore, each of the plurality of channel measurements resources may correspond to a respective interference measurement in a plurality of interference measurements. The respective interference measurement may be associated with an interference assumption or an interference hypothesis. In some examples, the interference assumption or the interference hypothesis may include TRP ON-OFF hypothesis. The interference assumption or the interference hypothesis may include a configuration of one or more second network devices. The one or more second network devices may include interference or interfering TRPs. In some examples, step 1704 may include some of the configuration information transmitted in step 902 of FIG. 9.
[0273] In some examples, referring back to FIG. 12, the measurement resource configuration transmitted at step 1704 may include the measurement resource configuration in the example of FIG. 12. The measurement resource configuration that associates a plurality of channel measurement resources together (e.g., CMR1, CMR2, CMR3, and CMR4 are associated together) .
[0274] In some examples, the configuration of the one or more second network devices is related to: (1) a second network device of the one or more second network devices being configured to be in an ON state or in an OFF state; (2) a second network device of the one or more second network devices being configured to be in a woken up state or in a sleep state.
[0275] At step 1706, optionally, the terminal device 1702 may receive one or more first reference signals for the respective interference measurement. In some examples, each of the one or more first reference signal may comprise a channel state information interference measurement reference signal (CSI-IM-RS) . In some examples step 1706 may be consistent with transmission made in or similar to step 904 of FIG. 9 for the channel measurement.
[0276] At step 1708, optionally, the terminal device 1702 may perform the respective interference measurement. In some examples, the respective interference measurement is performed based on the received one or more first reference signals and the plurality of channel measurement resources. In other examples, the respective interference measurement is performed based on the received one or more first reference signals and other interference measurements. In some examples, step 1708 may be consistent with transmissions made in step 906 of FIG. 9 based on the channel measurement resource (e.g., CMR1-CMR4 which are associated with respect to each other as shown in the example of FIG. 12) . Furthermore, step 1708 may be performed in the example of FIG. 13 to perform different respective interference measurement in various TRP ON-OFF hypotheses. In some examples, the different respective interference measurement may be taken within a measuring window, such as the measuring window 1410 in the example of FIG. 14.
[0277] At step 1710, optionally, the terminal device 1702 may transmit a channel state information (CSI) report, such as based on the plurality of channel measurement resources. In some examples, step 1710 may be consistent with transmission made or similar to in step 908 of FIG. 9.
[0278] In some examples, the CSI report comprises at least one of: CSI-RS resource indicator; RI; PMI; LI; and CQI.
[0279] In some implementation, the CSI report comprises a plurality of sub-reports, and each of the plurality of sub-reports corresponds to the respective interference measurement. Each of the plurality of sub-reports comprises a respective channel state information associated with the respective interference measurement.
[0280] Alternatively, the CSI report may comprise a first parameter set for channel state information for the plurality of interference measurements and a respective set of second parameter sets for each respective interference measurement. The first parameter set may include a common parameter set for the plurality of interference measurements. Each second parameter set is an individual parameter set that corresponds to each respective interference measurement.
[0281] In some examples, the CSI report may comprise a base channel state information report and a respective differential channel quality indicator for each respective interference measurement.
[0282] In some applications, the CSI report may comprise a first reference signal received power (RSRP) and respective differential reference signal received powers with respect to the first reference signal received power for each respective interference measurement.
[0283] Optionally, the CSI report may comprise a first signal-to-interference-plus-noise ratio (SINR) and respective differential signal-to-interference-plus-noise ratios with respect to the first signal-to-interference-plus-noise ratio for each respective interference measurement.
[0284] In some embodiments, when the terminal device (e.g., UE 802) 1702 transmits the channel state information report to the network device 1701 (e.g., a base station) , at step 1712, the network device 1701 may make scheduling decisions based on the CSI report. In some examples, step 1712 may be consistent with or similar to step 910 of FIG. 9.
[0285] In some embodiments, at step 1714, the terminal device 1702 (e.g., the UE 802) may receive scheduling information for data from the network device 1701, based on the CSI report. In some examples, step 1714may be consistent with or similar to step 912 of FIG. 9. In some examples, the scheduling information pertaining to a window for performing one or more interference measurements may be consistent to the configuration discussed in the example of FIG. 14.
[0286] Alternatively, when the network device receives the channel state information report, the network device may transmit scheduling information for one or more second network devices (e.g., interference TRPs) based on the CSI report. The scheduling information comprises information to: configure a second network device of the one or more second network devices to be in an ON state or in an OFF state; or configure a second network device of the one or more second network devices to be in a woken up state or in a sleep state.
[0287] Such a method of associating a plurality of channel measurement resources with a first network device (e.g., a serving device) may enable interferences caused by interference devices to be measured in different interference assumption accurately, which may also allow for an accurate link adaption. Furthermore, because the network devices in a communication system (e.g., UCCF system) may be turned ON or OFF dynamically, the energy for the network and the UE may be still saved in the communications system.
[0288] It should be understood that, in the example of FIGs. 16 and 17, although the network devices 1601 and 1701 are denoted by reference numbers 1601 and 1701, in some embodiments, the network device 1601 and the network device 1701 may be an identical network device. In other examples, the network device 1601 and the network device 1701 may be different network devices. Furthermore, although the terminal devices 1602 and 1702 are denoted by reference numbers 1602 and 1702, in some embodiments, the terminal device 1602 and the network device 1702 may be an identical terminal device. In other examples, the terminal device 1602 and the network device 1702 may be different terminal devices.
[0289] The present disclosure describes a method of configurating measurement resources for channel measurements and interference measurements, which may help to improve accuracy of the channel measurements and the interference measurements in different interference assumptions, such as different TRP ON-OFF hypothesis. For example, a channel measurement resource is configured to be associated with a plurality of interference measurement resources. The channel measurement resource may be utilized for a channel measurement associated with a serving network device, such as the channel measurement between the serving network device and a terminal device. Each of the plurality of interference measurement resources may correspond to a respective interference measurement in a plurality of interference measurements.
[0290] In some alternative applications, measurement resources may be configured to associate a plurality of channel measurement resources with a serving network device. Each of the plurality of channel measurement resources corresponds to a respective interference measurement in a plurality of interference measurements. Such a configuration may help to improve accuracy of the interference measurements in different interference assumptions, such as different TRP ON-OFF hypothesis.
[0291] Furthermore, a channel state information (CSI) report may be transmitted to a network device (e.g., a base station) so that the network device will be able to make different TRP ON-OFF decisions or scheduling decisions based on the CSI report.
[0292] In some examples, the CSI report comprises at least one of: channel state information reference signal resource indicator (CSI-RS resource indicator) ; rank indicator (RI) ; precoding matrix indicator (PMI) ; layer indicator (LI) ; and channel quality indicator (CQI) .
[0293] In some examples, the present disclosure may be applied in any suitable system, such future 6G wireless communication systems, to offer critical services or power saving services.
[0294] Examples of devices, apparatus or systems (e.g., UE, BS, TRP, NW) to perform the various methods described herein are also disclosed.
[0295] In the present disclosure, the terms “a” or “an” are defined to mean “at least one” , that is, these terms do not exclude a plural number of items, unless stated otherwise.
[0296] In the present disclosure, terms such as “substantially” , “generally” and “about” , which modify a value, condition or characteristic of a feature of an example embodiment, should be understood to mean that the value, condition or characteristic is defined within tolerances that are acceptable for the proper operation of the example embodiment for its intended application.
[0297] In the present disclosure, unless stated otherwise, the terms “connected” and “coupled” , and derivatives and variants thereof, refer herein to any structural or functional connection or coupling, either direct or indirect, between two or more elements. For example, the connection or coupling between the elements can be acoustical, mechanical, optical, electrical, thermal, logical, or any combinations thereof.
[0298] In the present disclosure, expressions such as “match” , “matching” and “matched” , including variants and derivatives thereof, are intended to refer herein to a condition in which two or more elements are either the same or within some predetermined tolerance of each other. That is, these terms are meant to encompass not only “exactly” or “identically” matching the two elements but also “substantially” , “approximately” or “subjectively” matching the two or more elements, as well as providing a higher or best match among a plurality of matching possibilities.
[0299] In the present disclosure, the expression “based on” is intended to mean “based at least partly on” , that is, this expression can mean “based solely on” or “based partially on” , and so should not be interpreted in a limited manner. More particularly, the expression “based on” could also be understood as meaning “depending on” , “representative of” , “indicative of” , “associated with” or similar expressions.
[0300] In the present disclosure, the terms "system" and "network" may be used interchangeably in different embodiments of this application. "At least one" means one or more, and "a plurality of" means two or more. The term "and / or" describes an association relationship of associated objects, and indicates that three relationships may exist. For example, A and / or B may indicate the following three cases: Only A exists, both A and B exist, and only B exists, where A and B may be singular or plural. The character " / " indicates an "or" relationship between associated objects. "At least one of the following items (pieces) " or a similar expression thereof indicates any combination of these items, including a single item (piece) or any combination of a plurality of items (pieces) . For example, "at least one of A, B, or C" includes: only A; only B; only C; A and B; A and C; B and C; or A, B, and C, and "at least one of A, B, and C" may also be understood as including: only A; only B; only C; A and B; A and C; B and C; or A, B, and C. In addition, unless otherwise specified, ordinal numbers such as "first" and "second" in embodiments of this application are used to distinguish between a plurality of objects, and are not used to limit a sequence, a time sequence, priorities, or importance of the plurality of objects.
[0301] A person skilled in the art should understand that embodiments of this application may be provided as a method, an apparatus (or system) , computer-readable storage medium, or a computer program product. Therefore, this application may use a form of a hardware-only embodiment, a software-only embodiment, or an embodiment with a combination of software and hardware. Moreover, this application may use a form of a computer program product that is implemented on one or more computer-usable storage media (including but not limited to a disk memory, an optical memory, and the like) that include computer-usable program code.
[0302] This application is described with reference to the flowcharts and / or block diagrams of the method, the device (system) , and the computer program product according to this application. It should be understood that computer program instructions may be used to implement each process and / or each block in the flowcharts and / or the block diagrams and a combination of a process and / or a block in the flowcharts and / or the block diagrams. The computer program instructions may be provided for a general-purpose computer, a dedicated computer, an embedded processor, or a processor of another programmable data processing device and enable a machine to execute the instructions. When executed by any computer or the processor of a programmable data processing device, the instructions cause the apparatus to implement specific functions as described in one or more procedures in the flowcharts and / or one or more blocks in the block diagrams. The computer program instructions may alternatively be stored in a computer-readable memory that can indicate a computer or another programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate an artifact that includes an instruction apparatus. The instruction apparatus implements a specific function in one or more procedures in the flowcharts and / or one or more blocks in the block diagrams.
[0303] The computer program instructions may alternatively be loaded onto a computer or another programmable data processing device, so that a series of operations and steps are performed on the computer or the another programmable device, so that computer-implemented processing is generated. Therefore, the instructions executed on the computer or on another programmable device provide steps for implementing specific functions as described in one or more procedures in the flowcharts and / or one or more blocks in the block diagrams.
[0304] Although this disclosure refers to illustrative implementations, this is not intended to be construed in a limiting sense. Various modifications and combinations of the illustrative implementations, as well as other implementations of the disclosure, will be apparent to persons skilled in the art upon reference to the description.
[0305] Features disclosed herein in the context of any particular implementations may also or instead be implemented in other implementations. method implementations, for example, may also or instead be implemented in apparatus, system, and / or computer program product implementations. In addition, although implementations are described primarily in the context of methods and apparatus, other implementations are also contemplated, as instructions stored on one or more non-transitory computer-readable media, for example. Such media could store programming or instructions to perform any of various methods consistent with the present disclosure.
[0306] Although aspects of the disclosure of the present disclosure have been described with reference to specific features and example implementations thereof, various modifications and combinations can be made thereto without departing from the disclosure. The description and drawings are, accordingly, to be regarded simply as an illustration of some implementations of the disclosure as defined by the appended claims, and are contemplated to cover any and all modifications, variations, combinations or equivalents that fall within the scope of the present disclosure. Therefore, although implementations and potential advantages have been described in detail, various changes, substitutions and alterations can be made herein without departing from the disclosure as defined by the appended claims. Moreover, the scope of the present application is not intended to be limited to the particular implementations of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. As one of ordinary skill in the art will readily appreciate from the disclosure of the present disclosure, processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed, that perform substantially the same function or achieve substantially the same result as the corresponding implementations described herein may be utilized according to the present disclosure. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.
[0307] Moreover, any module, component, or device exemplified herein that executes instructions may include or otherwise have access to a non-transitory computer readable or processor readable storage medium or media for storage of information, such as computer readable or processor readable instructions, data structures, program modules, and / or other data. A non-exhaustive list of examples of non-transitory computer readable or processor readable storage media includes magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, optical disks such as compact disc read-only memory (CD-ROM) , digital video discs or digital versatile disc (DVDs) , Blu-ray DiscTM, or other optical storage, volatile and non-volatile, removable and nonremovable media implemented in any method or technology, random-access memory (RAM) , read-only memory (ROM) , electrically erasable programmable read-only memory (EEPROM) , flash memory or other memory technology. Any such non-transitory computer readable or processor readable storage media may be part of a device or accessible or connectable thereto. Any application or module herein described may be implemented using instructions that are readable and executable by a computer or processor may be stored or otherwise held by such non-transitory computer readable or processor readable storage media.
[0308] It is clear that a person skilled in the art can make various modifications and variations to this application without departing from the scope of this disclosure. This disclosure is intended to cover these modifications and variations of this application provided that they fall within the scope of protection defined by the following claims and their equivalent technologies.
[0309] The following acronyms / abbreviations / initialisms may be referenced herein:
Claims
1.A method at a terminal device, the method comprising:receiving measurement resource configuration that associates a channel measurement resource with a plurality of interference measurement resources, wherein the channel measurement resource corresponds to a channel measurement associated with a first network device, and each of the plurality of interference measurement resources corresponds to a respective interference measurement in a plurality of interference measurements.2.The method of claim 1, further comprising:receiving one or more first reference signals for the channel measurement associated with the first network device; andperforming the channel measurement associated with the first network device based on the received one or more first reference signals and the channel measurement resource.3.The method of claim 2, wherein each of the one or more first reference signal comprises a non-zero-power channel state information reference signal.4.The method of any one of claims 1 to 3, wherein the respective interference measurement is associated with a corresponding configuration of one or more second network devices.5.The method of any one of claims 1 to 4, further comprising:performing the respective interference measurement based on a corresponding interference measurement resource.6.The method of claim 4, further comprising:performing additional interference measurements associated with another corresponding configuration of the one or more second network devices based on the plurality of interference measurement resources.7.The method of any one of claims 4 to 6, wherein each of the plurality of interference measurement resources comprises a channel state information interference measurement resource.8.A method at a terminal device, the method comprising:receiving measurement resource configuration that associates a plurality of channel measurement resources with a first network device, wherein each of the plurality of channel measurement resources corresponds to a respective interference measurement in a plurality of interference measurements.9.The method of claim 8, wherein the plurality of channel measurement resources also corresponds to a channel measurement associated with the first network device.10.The method of claim 8 or 9, further comprising receiving one or more first reference signals for the respective interference measurement.11.The method of claim 10, further comprising performing the respective interference measurement based on the received one or more first reference signals and a corresponding channel measurement resource.12.The method of claim 10, further comprising performing additional interference measurement based on the received one or more first reference signals and the plurality of channel measurement resources.13.The method of any one of claims 1 to 7, further comprising transmitting a channel state information report based on the channel measurement resource and the plurality of interference measurement resources.14.The method of any one of claims 8 to 12, further comprising transmitting a channel state information report based on the plurality of channel measurement resources.15.The method of claim 13 or claim 14, wherein the channel state information report comprises at least one of:channel state information reference signal resource indicator;rank indicator;precoding matrix indicator;layer indicator; andchannel quality indicator.16.The method of claim 13 or claim 14, wherein the channel state information report comprises a plurality of sub-reports, and each of the plurality of sub-reports corresponds to the respective interference measurement.17.The method of claim 16, wherein each of the plurality of sub-reports comprises a respective channel state information associated with the respective interference measurement.18.The method of claim 13 or claim 14, wherein the channel state information report comprises a first parameter set for channel state information for the plurality of interference measurements and a respective set of second parameter sets for each respective interference measurement.19.The method of claim 13 or claim 14, wherein the channel state information report comprises a base channel state information report and a respective differential channel quality indicator for each respective interference measurement.20.The method of claim 13 or claim 14, wherein the channel state information report comprises a first reference signal received power and respective differential reference signal received powers with respect to the first reference signal received power for each respective interference measurement.21.The method of claim 13 or claim 14, wherein the channel state information report comprises a first signal-to-interference-plus-noise ratio and respective differential signal-to-interference-plus-noise ratios with respect to the first signal-to-interference-plus-noise ratio for each respective interference measurement.22.The method of any one of claims 12 to 21 further comprising receiving scheduling information for data based on the channel state information report.23.The method of claim 22, wherein the configuration of one or more second network devices is related to:a second network device of the one or more second network devices being configured to be in an ON state or in an OFF state; ora second network device of the one or more second network devices being configured to be in a woken up state or in a sleep state.24.A method at a network device, the method comprising:transmitting measurement resource configuration that associates a channel measurement resource with a plurality of interference measurement resources, wherein the channel measurement resource corresponds to a channel measurement associated with a first network device, and each of the plurality of interference measurement resources corresponds to a respective interference measurement.25.The method of claim 24, further comprising transmitting one or more first reference signals for the channel measurement associated with the first network device.26.The method of claim 25, wherein each of the one or more first reference signal comprises a non-zero-power channel state information reference signal.27.The method of any one of claims 24 to 26, wherein the respective interference measurement is associated with a corresponding configuration of one or more second network devices.28.The method of any one of claims 24 to 26, wherein each of the plurality of interference measurement resources comprises a channel state information interference measurement resource.29.A method at a network device, the method comprising:transmitting measurement resource configuration that associates a plurality of channel measurement resources with a first network device, wherein each of the plurality of channel measurement resources corresponds to a respective interference measurement in a plurality of interference measurements.30.The method of claim 29, wherein the plurality of channel measurement resources also corresponds to a channel measurement associated with the first network device.31.The method of claim 29 or 30, further comprising transmitting one or more first reference signals for the respective interference measurement.32.The method of any one of claims 24 to 28, further comprising receiving a channel state information report based on the channel measurement resource and the plurality of interference measurement resources.33.The method of any one of claims 29 to 31, further comprising receiving a channel state information report based on the plurality of channel measurement resources.34.The method of claim 32 or claim 33, wherein the channel state information report comprises at least one of:channel state information reference signal resource indicator;rank indicator;precoding matrix indicator;layer indicator; andchannel quality indicator.35.The method of claim 32 or claim 33, wherein the channel state information report comprises a plurality of sub-reports, and each of the plurality of sub-reports corresponds to the respective interference measurement.36.The method of claim 35, wherein each of the plurality of sub-reports comprises a respective channel state information associated with the respective interference measurement.37.The method of claim 32 or claim 33, wherein the channel state information report comprises a first parameter set for channel state information for the plurality of interference measurements and a respective set of second parameter sets for each respective interference measurement.38.The method of claim 32 or claim 33, wherein the channel state information report comprises a base channel state information report and a respective differential channel quality indicator for each respective interference measurement.39.The method of claim 32 or claim 33, wherein the channel state information report comprises a first reference signal received power and respective differential reference signal received powers with respect to the first reference signal received power for each respective interference measurement.40.The method of claim 32 or claim 33, wherein the channel state information report comprises a first signal-to-interference-plus-noise ratio and respective differential signal-to-interference-plus-noise ratios with respect to the first signal-to-interference-plus-noise ratio for each respective interference measurement.41.The method of any one of claims 24 to 40 further comprising transmitting scheduling information for data based on channel state information report.42.The method of any one of claims 27 to 40 further comprising transmitting scheduling information for the one or more second network devices based on the channel state information report.43.The method of claim 42 wherein the scheduling information comprises information to:configuring a second network device of the one or more second network devices to be in an ON state or in an OFF state; orconfiguring a second network device of the one or more second network devices to be in a woken-up state or in a sleep state.44.A communication apparatus, configured to perform the method of any one of claims 1 to 23.45.A communication apparatus, configured to perform the method of any one of claims 24 to 43.46.An apparatus, the apparatus comprising:one or more processors; anda memory storing instructions which, when executed by the one or more processors, cause the apparatus to perform the method of any one of claims 1 to 23.47.An apparatus comprising:one or more processors; anda memory storing instructions which, when executed by the one or more processors, cause the apparatus to perform the method of any one of claims 24 to 43.48.A communication apparatus, configured to perform the method of any one of claims 1 to 23 or the method of any one of claims 24 to 43.49.A computer program product storing instructions which, when executed, cause an apparatus to perform the method of any one of claims 1 to 23 or the method of any one of claims 24 to 43.50.A computer-readable storage medium having instructions stored thereon which, when executed by one or more processors, cause the one or more processors to perform the method of any one of claims 1 to 23 or the method of any one of claims 24 to 43.51.A communication system, wherein the communication system comprises a first communication apparatus configured to perform the method of any one of claims 1 to 23 and a second communication apparatus configured to perform the method of any one of claims 24 to 43.